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/*
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* virtual page mapping and translated block handling
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*
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* Copyright (c) 2003 Fabrice Bellard
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include "config.h" |
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#ifdef _WIN32
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#include <windows.h> |
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#else
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#include <sys/types.h> |
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#include <sys/mman.h> |
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#endif
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#include "qemu-common.h" |
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#include "cpu.h" |
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#include "tcg.h" |
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#include "hw/hw.h" |
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#include "hw/qdev.h" |
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#include "osdep.h" |
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#include "kvm.h" |
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#include "hw/xen.h" |
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#include "qemu-timer.h" |
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#include "memory.h" |
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#include "exec-memory.h" |
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#if defined(CONFIG_USER_ONLY)
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#include <qemu.h> |
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#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
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#include <sys/param.h> |
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#if __FreeBSD_version >= 700104 |
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#define HAVE_KINFO_GETVMMAP
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#define sigqueue sigqueue_freebsd /* avoid redefinition */ |
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#include <sys/time.h> |
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#include <sys/proc.h> |
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#include <machine/profile.h> |
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#define _KERNEL
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#include <sys/user.h> |
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#undef _KERNEL
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#undef sigqueue
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#include <libutil.h> |
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#endif
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#endif
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#else /* !CONFIG_USER_ONLY */ |
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#include "xen-mapcache.h" |
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#include "trace.h" |
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#endif
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#define WANT_EXEC_OBSOLETE
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#include "exec-obsolete.h" |
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//#define DEBUG_TB_INVALIDATE
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//#define DEBUG_FLUSH
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//#define DEBUG_TLB
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//#define DEBUG_UNASSIGNED
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/* make various TB consistency checks */
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//#define DEBUG_TB_CHECK
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//#define DEBUG_TLB_CHECK
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|
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//#define DEBUG_IOPORT
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//#define DEBUG_SUBPAGE
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#if !defined(CONFIG_USER_ONLY)
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/* TB consistency checks only implemented for usermode emulation. */
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#undef DEBUG_TB_CHECK
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#endif
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#define SMC_BITMAP_USE_THRESHOLD 10 |
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static TranslationBlock *tbs;
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static int code_gen_max_blocks; |
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TranslationBlock *tb_phys_hash[CODE_GEN_PHYS_HASH_SIZE]; |
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static int nb_tbs; |
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/* any access to the tbs or the page table must use this lock */
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spinlock_t tb_lock = SPIN_LOCK_UNLOCKED; |
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#if defined(__arm__) || defined(__sparc_v9__)
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/* The prologue must be reachable with a direct jump. ARM and Sparc64
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have limited branch ranges (possibly also PPC) so place it in a
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section close to code segment. */
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#define code_gen_section \
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__attribute__((__section__(".gen_code"))) \
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__attribute__((aligned (32)))
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#elif defined(_WIN32)
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/* Maximum alignment for Win32 is 16. */
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#define code_gen_section \
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__attribute__((aligned (16)))
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#else
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#define code_gen_section \
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__attribute__((aligned (32)))
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#endif
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uint8_t code_gen_prologue[1024] code_gen_section;
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static uint8_t *code_gen_buffer;
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static unsigned long code_gen_buffer_size; |
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/* threshold to flush the translated code buffer */
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static unsigned long code_gen_buffer_max_size; |
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static uint8_t *code_gen_ptr;
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#if !defined(CONFIG_USER_ONLY)
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int phys_ram_fd;
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static int in_migration; |
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RAMList ram_list = { .blocks = QLIST_HEAD_INITIALIZER(ram_list.blocks) }; |
117 |
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static MemoryRegion *system_memory;
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static MemoryRegion *system_io;
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MemoryRegion io_mem_ram, io_mem_rom, io_mem_unassigned, io_mem_notdirty; |
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static MemoryRegion io_mem_subpage_ram;
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#endif
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CPUState *first_cpu; |
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/* current CPU in the current thread. It is only valid inside
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cpu_exec() */
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DEFINE_TLS(CPUState *,cpu_single_env); |
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/* 0 = Do not count executed instructions.
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1 = Precise instruction counting.
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2 = Adaptive rate instruction counting. */
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int use_icount = 0; |
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typedef struct PageDesc { |
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/* list of TBs intersecting this ram page */
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TranslationBlock *first_tb; |
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/* in order to optimize self modifying code, we count the number
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of lookups we do to a given page to use a bitmap */
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unsigned int code_write_count; |
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uint8_t *code_bitmap; |
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#if defined(CONFIG_USER_ONLY)
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unsigned long flags; |
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#endif
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} PageDesc; |
146 |
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/* In system mode we want L1_MAP to be based on ram offsets,
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while in user mode we want it to be based on virtual addresses. */
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#if !defined(CONFIG_USER_ONLY)
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#if HOST_LONG_BITS < TARGET_PHYS_ADDR_SPACE_BITS
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# define L1_MAP_ADDR_SPACE_BITS HOST_LONG_BITS
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#else
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# define L1_MAP_ADDR_SPACE_BITS TARGET_PHYS_ADDR_SPACE_BITS
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#endif
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#else
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# define L1_MAP_ADDR_SPACE_BITS TARGET_VIRT_ADDR_SPACE_BITS
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#endif
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/* Size of the L2 (and L3, etc) page tables. */
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#define L2_BITS 10 |
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#define L2_SIZE (1 << L2_BITS) |
162 |
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#define P_L2_LEVELS \
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(((TARGET_PHYS_ADDR_SPACE_BITS - TARGET_PAGE_BITS - 1) / L2_BITS) + 1) |
165 |
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/* The bits remaining after N lower levels of page tables. */
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#define V_L1_BITS_REM \
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((L1_MAP_ADDR_SPACE_BITS - TARGET_PAGE_BITS) % L2_BITS) |
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#if V_L1_BITS_REM < 4 |
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#define V_L1_BITS (V_L1_BITS_REM + L2_BITS)
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#else
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#define V_L1_BITS V_L1_BITS_REM
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#endif
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#define V_L1_SIZE ((target_ulong)1 << V_L1_BITS) |
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#define V_L1_SHIFT (L1_MAP_ADDR_SPACE_BITS - TARGET_PAGE_BITS - V_L1_BITS)
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unsigned long qemu_real_host_page_size; |
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unsigned long qemu_host_page_size; |
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unsigned long qemu_host_page_mask; |
183 |
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/* This is a multi-level map on the virtual address space.
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The bottom level has pointers to PageDesc. */
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static void *l1_map[V_L1_SIZE]; |
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#if !defined(CONFIG_USER_ONLY)
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typedef struct PhysPageEntry PhysPageEntry; |
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static MemoryRegionSection *phys_sections;
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static unsigned phys_sections_nb, phys_sections_nb_alloc; |
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static uint16_t phys_section_unassigned;
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static uint16_t phys_section_notdirty;
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static uint16_t phys_section_rom;
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static uint16_t phys_section_watch;
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struct PhysPageEntry {
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uint16_t is_leaf : 1;
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/* index into phys_sections (is_leaf) or phys_map_nodes (!is_leaf) */
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uint16_t ptr : 15;
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}; |
203 |
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/* Simple allocator for PhysPageEntry nodes */
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static PhysPageEntry (*phys_map_nodes)[L2_SIZE];
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static unsigned phys_map_nodes_nb, phys_map_nodes_nb_alloc; |
207 |
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#define PHYS_MAP_NODE_NIL (((uint16_t)~0) >> 1) |
209 |
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/* This is a multi-level map on the physical address space.
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The bottom level has pointers to MemoryRegionSections. */
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static PhysPageEntry phys_map = { .ptr = PHYS_MAP_NODE_NIL, .is_leaf = 0 }; |
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static void io_mem_init(void); |
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static void memory_map_init(void); |
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/* io memory support */
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MemoryRegion *io_mem_region[IO_MEM_NB_ENTRIES]; |
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static char io_mem_used[IO_MEM_NB_ENTRIES]; |
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static MemoryRegion io_mem_watch;
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#endif
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/* log support */
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#ifdef WIN32
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static const char *logfilename = "qemu.log"; |
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#else
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static const char *logfilename = "/tmp/qemu.log"; |
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#endif
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FILE *logfile; |
230 |
int loglevel;
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static int log_append = 0; |
232 |
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/* statistics */
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#if !defined(CONFIG_USER_ONLY)
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static int tlb_flush_count; |
236 |
#endif
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static int tb_flush_count; |
238 |
static int tb_phys_invalidate_count; |
239 |
|
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#ifdef _WIN32
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static void map_exec(void *addr, long size) |
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{ |
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DWORD old_protect; |
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VirtualProtect(addr, size, |
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PAGE_EXECUTE_READWRITE, &old_protect); |
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} |
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#else
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static void map_exec(void *addr, long size) |
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{ |
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unsigned long start, end, page_size; |
252 |
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page_size = getpagesize(); |
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start = (unsigned long)addr; |
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start &= ~(page_size - 1);
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end = (unsigned long)addr + size; |
258 |
end += page_size - 1;
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end &= ~(page_size - 1);
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mprotect((void *)start, end - start,
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PROT_READ | PROT_WRITE | PROT_EXEC); |
263 |
} |
264 |
#endif
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static void page_init(void) |
267 |
{ |
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/* NOTE: we can always suppose that qemu_host_page_size >=
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TARGET_PAGE_SIZE */
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#ifdef _WIN32
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{ |
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SYSTEM_INFO system_info; |
273 |
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GetSystemInfo(&system_info); |
275 |
qemu_real_host_page_size = system_info.dwPageSize; |
276 |
} |
277 |
#else
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qemu_real_host_page_size = getpagesize(); |
279 |
#endif
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280 |
if (qemu_host_page_size == 0) |
281 |
qemu_host_page_size = qemu_real_host_page_size; |
282 |
if (qemu_host_page_size < TARGET_PAGE_SIZE)
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qemu_host_page_size = TARGET_PAGE_SIZE; |
284 |
qemu_host_page_mask = ~(qemu_host_page_size - 1);
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285 |
|
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#if defined(CONFIG_BSD) && defined(CONFIG_USER_ONLY)
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{ |
288 |
#ifdef HAVE_KINFO_GETVMMAP
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struct kinfo_vmentry *freep;
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int i, cnt;
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291 |
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freep = kinfo_getvmmap(getpid(), &cnt); |
293 |
if (freep) {
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mmap_lock(); |
295 |
for (i = 0; i < cnt; i++) { |
296 |
unsigned long startaddr, endaddr; |
297 |
|
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startaddr = freep[i].kve_start; |
299 |
endaddr = freep[i].kve_end; |
300 |
if (h2g_valid(startaddr)) {
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startaddr = h2g(startaddr) & TARGET_PAGE_MASK; |
302 |
|
303 |
if (h2g_valid(endaddr)) {
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304 |
endaddr = h2g(endaddr); |
305 |
page_set_flags(startaddr, endaddr, PAGE_RESERVED); |
306 |
} else {
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307 |
#if TARGET_ABI_BITS <= L1_MAP_ADDR_SPACE_BITS
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308 |
endaddr = ~0ul;
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309 |
page_set_flags(startaddr, endaddr, PAGE_RESERVED); |
310 |
#endif
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} |
312 |
} |
313 |
} |
314 |
free(freep); |
315 |
mmap_unlock(); |
316 |
} |
317 |
#else
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FILE *f; |
319 |
|
320 |
last_brk = (unsigned long)sbrk(0); |
321 |
|
322 |
f = fopen("/compat/linux/proc/self/maps", "r"); |
323 |
if (f) {
|
324 |
mmap_lock(); |
325 |
|
326 |
do {
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327 |
unsigned long startaddr, endaddr; |
328 |
int n;
|
329 |
|
330 |
n = fscanf (f, "%lx-%lx %*[^\n]\n", &startaddr, &endaddr);
|
331 |
|
332 |
if (n == 2 && h2g_valid(startaddr)) { |
333 |
startaddr = h2g(startaddr) & TARGET_PAGE_MASK; |
334 |
|
335 |
if (h2g_valid(endaddr)) {
|
336 |
endaddr = h2g(endaddr); |
337 |
} else {
|
338 |
endaddr = ~0ul;
|
339 |
} |
340 |
page_set_flags(startaddr, endaddr, PAGE_RESERVED); |
341 |
} |
342 |
} while (!feof(f));
|
343 |
|
344 |
fclose(f); |
345 |
mmap_unlock(); |
346 |
} |
347 |
#endif
|
348 |
} |
349 |
#endif
|
350 |
} |
351 |
|
352 |
static PageDesc *page_find_alloc(tb_page_addr_t index, int alloc) |
353 |
{ |
354 |
PageDesc *pd; |
355 |
void **lp;
|
356 |
int i;
|
357 |
|
358 |
#if defined(CONFIG_USER_ONLY)
|
359 |
/* We can't use g_malloc because it may recurse into a locked mutex. */
|
360 |
# define ALLOC(P, SIZE) \
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361 |
do { \
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362 |
P = mmap(NULL, SIZE, PROT_READ | PROT_WRITE, \
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363 |
MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); \ |
364 |
} while (0) |
365 |
#else
|
366 |
# define ALLOC(P, SIZE) \
|
367 |
do { P = g_malloc0(SIZE); } while (0) |
368 |
#endif
|
369 |
|
370 |
/* Level 1. Always allocated. */
|
371 |
lp = l1_map + ((index >> V_L1_SHIFT) & (V_L1_SIZE - 1));
|
372 |
|
373 |
/* Level 2..N-1. */
|
374 |
for (i = V_L1_SHIFT / L2_BITS - 1; i > 0; i--) { |
375 |
void **p = *lp;
|
376 |
|
377 |
if (p == NULL) { |
378 |
if (!alloc) {
|
379 |
return NULL; |
380 |
} |
381 |
ALLOC(p, sizeof(void *) * L2_SIZE); |
382 |
*lp = p; |
383 |
} |
384 |
|
385 |
lp = p + ((index >> (i * L2_BITS)) & (L2_SIZE - 1));
|
386 |
} |
387 |
|
388 |
pd = *lp; |
389 |
if (pd == NULL) { |
390 |
if (!alloc) {
|
391 |
return NULL; |
392 |
} |
393 |
ALLOC(pd, sizeof(PageDesc) * L2_SIZE);
|
394 |
*lp = pd; |
395 |
} |
396 |
|
397 |
#undef ALLOC
|
398 |
|
399 |
return pd + (index & (L2_SIZE - 1)); |
400 |
} |
401 |
|
402 |
static inline PageDesc *page_find(tb_page_addr_t index) |
403 |
{ |
404 |
return page_find_alloc(index, 0); |
405 |
} |
406 |
|
407 |
#if !defined(CONFIG_USER_ONLY)
|
408 |
|
409 |
static void phys_map_node_reserve(unsigned nodes) |
410 |
{ |
411 |
if (phys_map_nodes_nb + nodes > phys_map_nodes_nb_alloc) {
|
412 |
typedef PhysPageEntry Node[L2_SIZE];
|
413 |
phys_map_nodes_nb_alloc = MAX(phys_map_nodes_nb_alloc * 2, 16); |
414 |
phys_map_nodes_nb_alloc = MAX(phys_map_nodes_nb_alloc, |
415 |
phys_map_nodes_nb + nodes); |
416 |
phys_map_nodes = g_renew(Node, phys_map_nodes, |
417 |
phys_map_nodes_nb_alloc); |
418 |
} |
419 |
} |
420 |
|
421 |
static uint16_t phys_map_node_alloc(void) |
422 |
{ |
423 |
unsigned i;
|
424 |
uint16_t ret; |
425 |
|
426 |
ret = phys_map_nodes_nb++; |
427 |
assert(ret != PHYS_MAP_NODE_NIL); |
428 |
assert(ret != phys_map_nodes_nb_alloc); |
429 |
for (i = 0; i < L2_SIZE; ++i) { |
430 |
phys_map_nodes[ret][i].is_leaf = 0;
|
431 |
phys_map_nodes[ret][i].ptr = PHYS_MAP_NODE_NIL; |
432 |
} |
433 |
return ret;
|
434 |
} |
435 |
|
436 |
static void phys_map_nodes_reset(void) |
437 |
{ |
438 |
phys_map_nodes_nb = 0;
|
439 |
} |
440 |
|
441 |
|
442 |
static void phys_page_set_level(PhysPageEntry *lp, target_phys_addr_t *index, |
443 |
target_phys_addr_t *nb, uint16_t leaf, |
444 |
int level)
|
445 |
{ |
446 |
PhysPageEntry *p; |
447 |
int i;
|
448 |
target_phys_addr_t step = (target_phys_addr_t)1 << (level * L2_BITS);
|
449 |
|
450 |
if (!lp->is_leaf && lp->ptr == PHYS_MAP_NODE_NIL) {
|
451 |
lp->ptr = phys_map_node_alloc(); |
452 |
p = phys_map_nodes[lp->ptr]; |
453 |
if (level == 0) { |
454 |
for (i = 0; i < L2_SIZE; i++) { |
455 |
p[i].is_leaf = 1;
|
456 |
p[i].ptr = phys_section_unassigned; |
457 |
} |
458 |
} |
459 |
} else {
|
460 |
p = phys_map_nodes[lp->ptr]; |
461 |
} |
462 |
lp = &p[(*index >> (level * L2_BITS)) & (L2_SIZE - 1)];
|
463 |
|
464 |
while (*nb && lp < &p[L2_SIZE]) {
|
465 |
if ((*index & (step - 1)) == 0 && *nb >= step) { |
466 |
lp->is_leaf = true;
|
467 |
lp->ptr = leaf; |
468 |
*index += step; |
469 |
*nb -= step; |
470 |
} else {
|
471 |
phys_page_set_level(lp, index, nb, leaf, level - 1);
|
472 |
} |
473 |
++lp; |
474 |
} |
475 |
} |
476 |
|
477 |
static void phys_page_set(target_phys_addr_t index, target_phys_addr_t nb, |
478 |
uint16_t leaf) |
479 |
{ |
480 |
/* Wildly overreserve - it doesn't matter much. */
|
481 |
phys_map_node_reserve(3 * P_L2_LEVELS);
|
482 |
|
483 |
phys_page_set_level(&phys_map, &index, &nb, leaf, P_L2_LEVELS - 1);
|
484 |
} |
485 |
|
486 |
static MemoryRegionSection *phys_page_find(target_phys_addr_t index)
|
487 |
{ |
488 |
PhysPageEntry lp = phys_map; |
489 |
PhysPageEntry *p; |
490 |
int i;
|
491 |
uint16_t s_index = phys_section_unassigned; |
492 |
|
493 |
for (i = P_L2_LEVELS - 1; i >= 0 && !lp.is_leaf; i--) { |
494 |
if (lp.ptr == PHYS_MAP_NODE_NIL) {
|
495 |
goto not_found;
|
496 |
} |
497 |
p = phys_map_nodes[lp.ptr]; |
498 |
lp = p[(index >> (i * L2_BITS)) & (L2_SIZE - 1)];
|
499 |
} |
500 |
|
501 |
s_index = lp.ptr; |
502 |
not_found:
|
503 |
return &phys_sections[s_index];
|
504 |
} |
505 |
|
506 |
static target_phys_addr_t section_addr(MemoryRegionSection *section,
|
507 |
target_phys_addr_t addr) |
508 |
{ |
509 |
addr -= section->offset_within_address_space; |
510 |
addr += section->offset_within_region; |
511 |
return addr;
|
512 |
} |
513 |
|
514 |
static void tlb_protect_code(ram_addr_t ram_addr); |
515 |
static void tlb_unprotect_code_phys(CPUState *env, ram_addr_t ram_addr, |
516 |
target_ulong vaddr); |
517 |
#define mmap_lock() do { } while(0) |
518 |
#define mmap_unlock() do { } while(0) |
519 |
#endif
|
520 |
|
521 |
#define DEFAULT_CODE_GEN_BUFFER_SIZE (32 * 1024 * 1024) |
522 |
|
523 |
#if defined(CONFIG_USER_ONLY)
|
524 |
/* Currently it is not recommended to allocate big chunks of data in
|
525 |
user mode. It will change when a dedicated libc will be used */
|
526 |
#define USE_STATIC_CODE_GEN_BUFFER
|
527 |
#endif
|
528 |
|
529 |
#ifdef USE_STATIC_CODE_GEN_BUFFER
|
530 |
static uint8_t static_code_gen_buffer[DEFAULT_CODE_GEN_BUFFER_SIZE]
|
531 |
__attribute__((aligned (CODE_GEN_ALIGN))); |
532 |
#endif
|
533 |
|
534 |
static void code_gen_alloc(unsigned long tb_size) |
535 |
{ |
536 |
#ifdef USE_STATIC_CODE_GEN_BUFFER
|
537 |
code_gen_buffer = static_code_gen_buffer; |
538 |
code_gen_buffer_size = DEFAULT_CODE_GEN_BUFFER_SIZE; |
539 |
map_exec(code_gen_buffer, code_gen_buffer_size); |
540 |
#else
|
541 |
code_gen_buffer_size = tb_size; |
542 |
if (code_gen_buffer_size == 0) { |
543 |
#if defined(CONFIG_USER_ONLY)
|
544 |
code_gen_buffer_size = DEFAULT_CODE_GEN_BUFFER_SIZE; |
545 |
#else
|
546 |
/* XXX: needs adjustments */
|
547 |
code_gen_buffer_size = (unsigned long)(ram_size / 4); |
548 |
#endif
|
549 |
} |
550 |
if (code_gen_buffer_size < MIN_CODE_GEN_BUFFER_SIZE)
|
551 |
code_gen_buffer_size = MIN_CODE_GEN_BUFFER_SIZE; |
552 |
/* The code gen buffer location may have constraints depending on
|
553 |
the host cpu and OS */
|
554 |
#if defined(__linux__)
|
555 |
{ |
556 |
int flags;
|
557 |
void *start = NULL; |
558 |
|
559 |
flags = MAP_PRIVATE | MAP_ANONYMOUS; |
560 |
#if defined(__x86_64__)
|
561 |
flags |= MAP_32BIT; |
562 |
/* Cannot map more than that */
|
563 |
if (code_gen_buffer_size > (800 * 1024 * 1024)) |
564 |
code_gen_buffer_size = (800 * 1024 * 1024); |
565 |
#elif defined(__sparc_v9__)
|
566 |
// Map the buffer below 2G, so we can use direct calls and branches
|
567 |
flags |= MAP_FIXED; |
568 |
start = (void *) 0x60000000UL; |
569 |
if (code_gen_buffer_size > (512 * 1024 * 1024)) |
570 |
code_gen_buffer_size = (512 * 1024 * 1024); |
571 |
#elif defined(__arm__)
|
572 |
/* Keep the buffer no bigger than 16MB to branch between blocks */
|
573 |
if (code_gen_buffer_size > 16 * 1024 * 1024) |
574 |
code_gen_buffer_size = 16 * 1024 * 1024; |
575 |
#elif defined(__s390x__)
|
576 |
/* Map the buffer so that we can use direct calls and branches. */
|
577 |
/* We have a +- 4GB range on the branches; leave some slop. */
|
578 |
if (code_gen_buffer_size > (3ul * 1024 * 1024 * 1024)) { |
579 |
code_gen_buffer_size = 3ul * 1024 * 1024 * 1024; |
580 |
} |
581 |
start = (void *)0x90000000UL; |
582 |
#endif
|
583 |
code_gen_buffer = mmap(start, code_gen_buffer_size, |
584 |
PROT_WRITE | PROT_READ | PROT_EXEC, |
585 |
flags, -1, 0); |
586 |
if (code_gen_buffer == MAP_FAILED) {
|
587 |
fprintf(stderr, "Could not allocate dynamic translator buffer\n");
|
588 |
exit(1);
|
589 |
} |
590 |
} |
591 |
#elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__) \
|
592 |
|| defined(__DragonFly__) || defined(__OpenBSD__) \ |
593 |
|| defined(__NetBSD__) |
594 |
{ |
595 |
int flags;
|
596 |
void *addr = NULL; |
597 |
flags = MAP_PRIVATE | MAP_ANONYMOUS; |
598 |
#if defined(__x86_64__)
|
599 |
/* FreeBSD doesn't have MAP_32BIT, use MAP_FIXED and assume
|
600 |
* 0x40000000 is free */
|
601 |
flags |= MAP_FIXED; |
602 |
addr = (void *)0x40000000; |
603 |
/* Cannot map more than that */
|
604 |
if (code_gen_buffer_size > (800 * 1024 * 1024)) |
605 |
code_gen_buffer_size = (800 * 1024 * 1024); |
606 |
#elif defined(__sparc_v9__)
|
607 |
// Map the buffer below 2G, so we can use direct calls and branches
|
608 |
flags |= MAP_FIXED; |
609 |
addr = (void *) 0x60000000UL; |
610 |
if (code_gen_buffer_size > (512 * 1024 * 1024)) { |
611 |
code_gen_buffer_size = (512 * 1024 * 1024); |
612 |
} |
613 |
#endif
|
614 |
code_gen_buffer = mmap(addr, code_gen_buffer_size, |
615 |
PROT_WRITE | PROT_READ | PROT_EXEC, |
616 |
flags, -1, 0); |
617 |
if (code_gen_buffer == MAP_FAILED) {
|
618 |
fprintf(stderr, "Could not allocate dynamic translator buffer\n");
|
619 |
exit(1);
|
620 |
} |
621 |
} |
622 |
#else
|
623 |
code_gen_buffer = g_malloc(code_gen_buffer_size); |
624 |
map_exec(code_gen_buffer, code_gen_buffer_size); |
625 |
#endif
|
626 |
#endif /* !USE_STATIC_CODE_GEN_BUFFER */ |
627 |
map_exec(code_gen_prologue, sizeof(code_gen_prologue));
|
628 |
code_gen_buffer_max_size = code_gen_buffer_size - |
629 |
(TCG_MAX_OP_SIZE * OPC_BUF_SIZE); |
630 |
code_gen_max_blocks = code_gen_buffer_size / CODE_GEN_AVG_BLOCK_SIZE; |
631 |
tbs = g_malloc(code_gen_max_blocks * sizeof(TranslationBlock));
|
632 |
} |
633 |
|
634 |
/* Must be called before using the QEMU cpus. 'tb_size' is the size
|
635 |
(in bytes) allocated to the translation buffer. Zero means default
|
636 |
size. */
|
637 |
void tcg_exec_init(unsigned long tb_size) |
638 |
{ |
639 |
cpu_gen_init(); |
640 |
code_gen_alloc(tb_size); |
641 |
code_gen_ptr = code_gen_buffer; |
642 |
page_init(); |
643 |
#if !defined(CONFIG_USER_ONLY) || !defined(CONFIG_USE_GUEST_BASE)
|
644 |
/* There's no guest base to take into account, so go ahead and
|
645 |
initialize the prologue now. */
|
646 |
tcg_prologue_init(&tcg_ctx); |
647 |
#endif
|
648 |
} |
649 |
|
650 |
bool tcg_enabled(void) |
651 |
{ |
652 |
return code_gen_buffer != NULL; |
653 |
} |
654 |
|
655 |
void cpu_exec_init_all(void) |
656 |
{ |
657 |
#if !defined(CONFIG_USER_ONLY)
|
658 |
memory_map_init(); |
659 |
io_mem_init(); |
660 |
#endif
|
661 |
} |
662 |
|
663 |
#if defined(CPU_SAVE_VERSION) && !defined(CONFIG_USER_ONLY)
|
664 |
|
665 |
static int cpu_common_post_load(void *opaque, int version_id) |
666 |
{ |
667 |
CPUState *env = opaque; |
668 |
|
669 |
/* 0x01 was CPU_INTERRUPT_EXIT. This line can be removed when the
|
670 |
version_id is increased. */
|
671 |
env->interrupt_request &= ~0x01;
|
672 |
tlb_flush(env, 1);
|
673 |
|
674 |
return 0; |
675 |
} |
676 |
|
677 |
static const VMStateDescription vmstate_cpu_common = { |
678 |
.name = "cpu_common",
|
679 |
.version_id = 1,
|
680 |
.minimum_version_id = 1,
|
681 |
.minimum_version_id_old = 1,
|
682 |
.post_load = cpu_common_post_load, |
683 |
.fields = (VMStateField []) { |
684 |
VMSTATE_UINT32(halted, CPUState), |
685 |
VMSTATE_UINT32(interrupt_request, CPUState), |
686 |
VMSTATE_END_OF_LIST() |
687 |
} |
688 |
}; |
689 |
#endif
|
690 |
|
691 |
CPUState *qemu_get_cpu(int cpu)
|
692 |
{ |
693 |
CPUState *env = first_cpu; |
694 |
|
695 |
while (env) {
|
696 |
if (env->cpu_index == cpu)
|
697 |
break;
|
698 |
env = env->next_cpu; |
699 |
} |
700 |
|
701 |
return env;
|
702 |
} |
703 |
|
704 |
void cpu_exec_init(CPUState *env)
|
705 |
{ |
706 |
CPUState **penv; |
707 |
int cpu_index;
|
708 |
|
709 |
#if defined(CONFIG_USER_ONLY)
|
710 |
cpu_list_lock(); |
711 |
#endif
|
712 |
env->next_cpu = NULL;
|
713 |
penv = &first_cpu; |
714 |
cpu_index = 0;
|
715 |
while (*penv != NULL) { |
716 |
penv = &(*penv)->next_cpu; |
717 |
cpu_index++; |
718 |
} |
719 |
env->cpu_index = cpu_index; |
720 |
env->numa_node = 0;
|
721 |
QTAILQ_INIT(&env->breakpoints); |
722 |
QTAILQ_INIT(&env->watchpoints); |
723 |
#ifndef CONFIG_USER_ONLY
|
724 |
env->thread_id = qemu_get_thread_id(); |
725 |
#endif
|
726 |
*penv = env; |
727 |
#if defined(CONFIG_USER_ONLY)
|
728 |
cpu_list_unlock(); |
729 |
#endif
|
730 |
#if defined(CPU_SAVE_VERSION) && !defined(CONFIG_USER_ONLY)
|
731 |
vmstate_register(NULL, cpu_index, &vmstate_cpu_common, env);
|
732 |
register_savevm(NULL, "cpu", cpu_index, CPU_SAVE_VERSION, |
733 |
cpu_save, cpu_load, env); |
734 |
#endif
|
735 |
} |
736 |
|
737 |
/* Allocate a new translation block. Flush the translation buffer if
|
738 |
too many translation blocks or too much generated code. */
|
739 |
static TranslationBlock *tb_alloc(target_ulong pc)
|
740 |
{ |
741 |
TranslationBlock *tb; |
742 |
|
743 |
if (nb_tbs >= code_gen_max_blocks ||
|
744 |
(code_gen_ptr - code_gen_buffer) >= code_gen_buffer_max_size) |
745 |
return NULL; |
746 |
tb = &tbs[nb_tbs++]; |
747 |
tb->pc = pc; |
748 |
tb->cflags = 0;
|
749 |
return tb;
|
750 |
} |
751 |
|
752 |
void tb_free(TranslationBlock *tb)
|
753 |
{ |
754 |
/* In practice this is mostly used for single use temporary TB
|
755 |
Ignore the hard cases and just back up if this TB happens to
|
756 |
be the last one generated. */
|
757 |
if (nb_tbs > 0 && tb == &tbs[nb_tbs - 1]) { |
758 |
code_gen_ptr = tb->tc_ptr; |
759 |
nb_tbs--; |
760 |
} |
761 |
} |
762 |
|
763 |
static inline void invalidate_page_bitmap(PageDesc *p) |
764 |
{ |
765 |
if (p->code_bitmap) {
|
766 |
g_free(p->code_bitmap); |
767 |
p->code_bitmap = NULL;
|
768 |
} |
769 |
p->code_write_count = 0;
|
770 |
} |
771 |
|
772 |
/* Set to NULL all the 'first_tb' fields in all PageDescs. */
|
773 |
|
774 |
static void page_flush_tb_1 (int level, void **lp) |
775 |
{ |
776 |
int i;
|
777 |
|
778 |
if (*lp == NULL) { |
779 |
return;
|
780 |
} |
781 |
if (level == 0) { |
782 |
PageDesc *pd = *lp; |
783 |
for (i = 0; i < L2_SIZE; ++i) { |
784 |
pd[i].first_tb = NULL;
|
785 |
invalidate_page_bitmap(pd + i); |
786 |
} |
787 |
} else {
|
788 |
void **pp = *lp;
|
789 |
for (i = 0; i < L2_SIZE; ++i) { |
790 |
page_flush_tb_1 (level - 1, pp + i);
|
791 |
} |
792 |
} |
793 |
} |
794 |
|
795 |
static void page_flush_tb(void) |
796 |
{ |
797 |
int i;
|
798 |
for (i = 0; i < V_L1_SIZE; i++) { |
799 |
page_flush_tb_1(V_L1_SHIFT / L2_BITS - 1, l1_map + i);
|
800 |
} |
801 |
} |
802 |
|
803 |
/* flush all the translation blocks */
|
804 |
/* XXX: tb_flush is currently not thread safe */
|
805 |
void tb_flush(CPUState *env1)
|
806 |
{ |
807 |
CPUState *env; |
808 |
#if defined(DEBUG_FLUSH)
|
809 |
printf("qemu: flush code_size=%ld nb_tbs=%d avg_tb_size=%ld\n",
|
810 |
(unsigned long)(code_gen_ptr - code_gen_buffer), |
811 |
nb_tbs, nb_tbs > 0 ?
|
812 |
((unsigned long)(code_gen_ptr - code_gen_buffer)) / nb_tbs : 0); |
813 |
#endif
|
814 |
if ((unsigned long)(code_gen_ptr - code_gen_buffer) > code_gen_buffer_size) |
815 |
cpu_abort(env1, "Internal error: code buffer overflow\n");
|
816 |
|
817 |
nb_tbs = 0;
|
818 |
|
819 |
for(env = first_cpu; env != NULL; env = env->next_cpu) { |
820 |
memset (env->tb_jmp_cache, 0, TB_JMP_CACHE_SIZE * sizeof (void *)); |
821 |
} |
822 |
|
823 |
memset (tb_phys_hash, 0, CODE_GEN_PHYS_HASH_SIZE * sizeof (void *)); |
824 |
page_flush_tb(); |
825 |
|
826 |
code_gen_ptr = code_gen_buffer; |
827 |
/* XXX: flush processor icache at this point if cache flush is
|
828 |
expensive */
|
829 |
tb_flush_count++; |
830 |
} |
831 |
|
832 |
#ifdef DEBUG_TB_CHECK
|
833 |
|
834 |
static void tb_invalidate_check(target_ulong address) |
835 |
{ |
836 |
TranslationBlock *tb; |
837 |
int i;
|
838 |
address &= TARGET_PAGE_MASK; |
839 |
for(i = 0;i < CODE_GEN_PHYS_HASH_SIZE; i++) { |
840 |
for(tb = tb_phys_hash[i]; tb != NULL; tb = tb->phys_hash_next) { |
841 |
if (!(address + TARGET_PAGE_SIZE <= tb->pc ||
|
842 |
address >= tb->pc + tb->size)) { |
843 |
printf("ERROR invalidate: address=" TARGET_FMT_lx
|
844 |
" PC=%08lx size=%04x\n",
|
845 |
address, (long)tb->pc, tb->size);
|
846 |
} |
847 |
} |
848 |
} |
849 |
} |
850 |
|
851 |
/* verify that all the pages have correct rights for code */
|
852 |
static void tb_page_check(void) |
853 |
{ |
854 |
TranslationBlock *tb; |
855 |
int i, flags1, flags2;
|
856 |
|
857 |
for(i = 0;i < CODE_GEN_PHYS_HASH_SIZE; i++) { |
858 |
for(tb = tb_phys_hash[i]; tb != NULL; tb = tb->phys_hash_next) { |
859 |
flags1 = page_get_flags(tb->pc); |
860 |
flags2 = page_get_flags(tb->pc + tb->size - 1);
|
861 |
if ((flags1 & PAGE_WRITE) || (flags2 & PAGE_WRITE)) {
|
862 |
printf("ERROR page flags: PC=%08lx size=%04x f1=%x f2=%x\n",
|
863 |
(long)tb->pc, tb->size, flags1, flags2);
|
864 |
} |
865 |
} |
866 |
} |
867 |
} |
868 |
|
869 |
#endif
|
870 |
|
871 |
/* invalidate one TB */
|
872 |
static inline void tb_remove(TranslationBlock **ptb, TranslationBlock *tb, |
873 |
int next_offset)
|
874 |
{ |
875 |
TranslationBlock *tb1; |
876 |
for(;;) {
|
877 |
tb1 = *ptb; |
878 |
if (tb1 == tb) {
|
879 |
*ptb = *(TranslationBlock **)((char *)tb1 + next_offset);
|
880 |
break;
|
881 |
} |
882 |
ptb = (TranslationBlock **)((char *)tb1 + next_offset);
|
883 |
} |
884 |
} |
885 |
|
886 |
static inline void tb_page_remove(TranslationBlock **ptb, TranslationBlock *tb) |
887 |
{ |
888 |
TranslationBlock *tb1; |
889 |
unsigned int n1; |
890 |
|
891 |
for(;;) {
|
892 |
tb1 = *ptb; |
893 |
n1 = (long)tb1 & 3; |
894 |
tb1 = (TranslationBlock *)((long)tb1 & ~3); |
895 |
if (tb1 == tb) {
|
896 |
*ptb = tb1->page_next[n1]; |
897 |
break;
|
898 |
} |
899 |
ptb = &tb1->page_next[n1]; |
900 |
} |
901 |
} |
902 |
|
903 |
static inline void tb_jmp_remove(TranslationBlock *tb, int n) |
904 |
{ |
905 |
TranslationBlock *tb1, **ptb; |
906 |
unsigned int n1; |
907 |
|
908 |
ptb = &tb->jmp_next[n]; |
909 |
tb1 = *ptb; |
910 |
if (tb1) {
|
911 |
/* find tb(n) in circular list */
|
912 |
for(;;) {
|
913 |
tb1 = *ptb; |
914 |
n1 = (long)tb1 & 3; |
915 |
tb1 = (TranslationBlock *)((long)tb1 & ~3); |
916 |
if (n1 == n && tb1 == tb)
|
917 |
break;
|
918 |
if (n1 == 2) { |
919 |
ptb = &tb1->jmp_first; |
920 |
} else {
|
921 |
ptb = &tb1->jmp_next[n1]; |
922 |
} |
923 |
} |
924 |
/* now we can suppress tb(n) from the list */
|
925 |
*ptb = tb->jmp_next[n]; |
926 |
|
927 |
tb->jmp_next[n] = NULL;
|
928 |
} |
929 |
} |
930 |
|
931 |
/* reset the jump entry 'n' of a TB so that it is not chained to
|
932 |
another TB */
|
933 |
static inline void tb_reset_jump(TranslationBlock *tb, int n) |
934 |
{ |
935 |
tb_set_jmp_target(tb, n, (unsigned long)(tb->tc_ptr + tb->tb_next_offset[n])); |
936 |
} |
937 |
|
938 |
void tb_phys_invalidate(TranslationBlock *tb, tb_page_addr_t page_addr)
|
939 |
{ |
940 |
CPUState *env; |
941 |
PageDesc *p; |
942 |
unsigned int h, n1; |
943 |
tb_page_addr_t phys_pc; |
944 |
TranslationBlock *tb1, *tb2; |
945 |
|
946 |
/* remove the TB from the hash list */
|
947 |
phys_pc = tb->page_addr[0] + (tb->pc & ~TARGET_PAGE_MASK);
|
948 |
h = tb_phys_hash_func(phys_pc); |
949 |
tb_remove(&tb_phys_hash[h], tb, |
950 |
offsetof(TranslationBlock, phys_hash_next)); |
951 |
|
952 |
/* remove the TB from the page list */
|
953 |
if (tb->page_addr[0] != page_addr) { |
954 |
p = page_find(tb->page_addr[0] >> TARGET_PAGE_BITS);
|
955 |
tb_page_remove(&p->first_tb, tb); |
956 |
invalidate_page_bitmap(p); |
957 |
} |
958 |
if (tb->page_addr[1] != -1 && tb->page_addr[1] != page_addr) { |
959 |
p = page_find(tb->page_addr[1] >> TARGET_PAGE_BITS);
|
960 |
tb_page_remove(&p->first_tb, tb); |
961 |
invalidate_page_bitmap(p); |
962 |
} |
963 |
|
964 |
tb_invalidated_flag = 1;
|
965 |
|
966 |
/* remove the TB from the hash list */
|
967 |
h = tb_jmp_cache_hash_func(tb->pc); |
968 |
for(env = first_cpu; env != NULL; env = env->next_cpu) { |
969 |
if (env->tb_jmp_cache[h] == tb)
|
970 |
env->tb_jmp_cache[h] = NULL;
|
971 |
} |
972 |
|
973 |
/* suppress this TB from the two jump lists */
|
974 |
tb_jmp_remove(tb, 0);
|
975 |
tb_jmp_remove(tb, 1);
|
976 |
|
977 |
/* suppress any remaining jumps to this TB */
|
978 |
tb1 = tb->jmp_first; |
979 |
for(;;) {
|
980 |
n1 = (long)tb1 & 3; |
981 |
if (n1 == 2) |
982 |
break;
|
983 |
tb1 = (TranslationBlock *)((long)tb1 & ~3); |
984 |
tb2 = tb1->jmp_next[n1]; |
985 |
tb_reset_jump(tb1, n1); |
986 |
tb1->jmp_next[n1] = NULL;
|
987 |
tb1 = tb2; |
988 |
} |
989 |
tb->jmp_first = (TranslationBlock *)((long)tb | 2); /* fail safe */ |
990 |
|
991 |
tb_phys_invalidate_count++; |
992 |
} |
993 |
|
994 |
static inline void set_bits(uint8_t *tab, int start, int len) |
995 |
{ |
996 |
int end, mask, end1;
|
997 |
|
998 |
end = start + len; |
999 |
tab += start >> 3;
|
1000 |
mask = 0xff << (start & 7); |
1001 |
if ((start & ~7) == (end & ~7)) { |
1002 |
if (start < end) {
|
1003 |
mask &= ~(0xff << (end & 7)); |
1004 |
*tab |= mask; |
1005 |
} |
1006 |
} else {
|
1007 |
*tab++ |= mask; |
1008 |
start = (start + 8) & ~7; |
1009 |
end1 = end & ~7;
|
1010 |
while (start < end1) {
|
1011 |
*tab++ = 0xff;
|
1012 |
start += 8;
|
1013 |
} |
1014 |
if (start < end) {
|
1015 |
mask = ~(0xff << (end & 7)); |
1016 |
*tab |= mask; |
1017 |
} |
1018 |
} |
1019 |
} |
1020 |
|
1021 |
static void build_page_bitmap(PageDesc *p) |
1022 |
{ |
1023 |
int n, tb_start, tb_end;
|
1024 |
TranslationBlock *tb; |
1025 |
|
1026 |
p->code_bitmap = g_malloc0(TARGET_PAGE_SIZE / 8);
|
1027 |
|
1028 |
tb = p->first_tb; |
1029 |
while (tb != NULL) { |
1030 |
n = (long)tb & 3; |
1031 |
tb = (TranslationBlock *)((long)tb & ~3); |
1032 |
/* NOTE: this is subtle as a TB may span two physical pages */
|
1033 |
if (n == 0) { |
1034 |
/* NOTE: tb_end may be after the end of the page, but
|
1035 |
it is not a problem */
|
1036 |
tb_start = tb->pc & ~TARGET_PAGE_MASK; |
1037 |
tb_end = tb_start + tb->size; |
1038 |
if (tb_end > TARGET_PAGE_SIZE)
|
1039 |
tb_end = TARGET_PAGE_SIZE; |
1040 |
} else {
|
1041 |
tb_start = 0;
|
1042 |
tb_end = ((tb->pc + tb->size) & ~TARGET_PAGE_MASK); |
1043 |
} |
1044 |
set_bits(p->code_bitmap, tb_start, tb_end - tb_start); |
1045 |
tb = tb->page_next[n]; |
1046 |
} |
1047 |
} |
1048 |
|
1049 |
TranslationBlock *tb_gen_code(CPUState *env, |
1050 |
target_ulong pc, target_ulong cs_base, |
1051 |
int flags, int cflags) |
1052 |
{ |
1053 |
TranslationBlock *tb; |
1054 |
uint8_t *tc_ptr; |
1055 |
tb_page_addr_t phys_pc, phys_page2; |
1056 |
target_ulong virt_page2; |
1057 |
int code_gen_size;
|
1058 |
|
1059 |
phys_pc = get_page_addr_code(env, pc); |
1060 |
tb = tb_alloc(pc); |
1061 |
if (!tb) {
|
1062 |
/* flush must be done */
|
1063 |
tb_flush(env); |
1064 |
/* cannot fail at this point */
|
1065 |
tb = tb_alloc(pc); |
1066 |
/* Don't forget to invalidate previous TB info. */
|
1067 |
tb_invalidated_flag = 1;
|
1068 |
} |
1069 |
tc_ptr = code_gen_ptr; |
1070 |
tb->tc_ptr = tc_ptr; |
1071 |
tb->cs_base = cs_base; |
1072 |
tb->flags = flags; |
1073 |
tb->cflags = cflags; |
1074 |
cpu_gen_code(env, tb, &code_gen_size); |
1075 |
code_gen_ptr = (void *)(((unsigned long)code_gen_ptr + code_gen_size + CODE_GEN_ALIGN - 1) & ~(CODE_GEN_ALIGN - 1)); |
1076 |
|
1077 |
/* check next page if needed */
|
1078 |
virt_page2 = (pc + tb->size - 1) & TARGET_PAGE_MASK;
|
1079 |
phys_page2 = -1;
|
1080 |
if ((pc & TARGET_PAGE_MASK) != virt_page2) {
|
1081 |
phys_page2 = get_page_addr_code(env, virt_page2); |
1082 |
} |
1083 |
tb_link_page(tb, phys_pc, phys_page2); |
1084 |
return tb;
|
1085 |
} |
1086 |
|
1087 |
/* invalidate all TBs which intersect with the target physical page
|
1088 |
starting in range [start;end[. NOTE: start and end must refer to
|
1089 |
the same physical page. 'is_cpu_write_access' should be true if called
|
1090 |
from a real cpu write access: the virtual CPU will exit the current
|
1091 |
TB if code is modified inside this TB. */
|
1092 |
void tb_invalidate_phys_page_range(tb_page_addr_t start, tb_page_addr_t end,
|
1093 |
int is_cpu_write_access)
|
1094 |
{ |
1095 |
TranslationBlock *tb, *tb_next, *saved_tb; |
1096 |
CPUState *env = cpu_single_env; |
1097 |
tb_page_addr_t tb_start, tb_end; |
1098 |
PageDesc *p; |
1099 |
int n;
|
1100 |
#ifdef TARGET_HAS_PRECISE_SMC
|
1101 |
int current_tb_not_found = is_cpu_write_access;
|
1102 |
TranslationBlock *current_tb = NULL;
|
1103 |
int current_tb_modified = 0; |
1104 |
target_ulong current_pc = 0;
|
1105 |
target_ulong current_cs_base = 0;
|
1106 |
int current_flags = 0; |
1107 |
#endif /* TARGET_HAS_PRECISE_SMC */ |
1108 |
|
1109 |
p = page_find(start >> TARGET_PAGE_BITS); |
1110 |
if (!p)
|
1111 |
return;
|
1112 |
if (!p->code_bitmap &&
|
1113 |
++p->code_write_count >= SMC_BITMAP_USE_THRESHOLD && |
1114 |
is_cpu_write_access) { |
1115 |
/* build code bitmap */
|
1116 |
build_page_bitmap(p); |
1117 |
} |
1118 |
|
1119 |
/* we remove all the TBs in the range [start, end[ */
|
1120 |
/* XXX: see if in some cases it could be faster to invalidate all the code */
|
1121 |
tb = p->first_tb; |
1122 |
while (tb != NULL) { |
1123 |
n = (long)tb & 3; |
1124 |
tb = (TranslationBlock *)((long)tb & ~3); |
1125 |
tb_next = tb->page_next[n]; |
1126 |
/* NOTE: this is subtle as a TB may span two physical pages */
|
1127 |
if (n == 0) { |
1128 |
/* NOTE: tb_end may be after the end of the page, but
|
1129 |
it is not a problem */
|
1130 |
tb_start = tb->page_addr[0] + (tb->pc & ~TARGET_PAGE_MASK);
|
1131 |
tb_end = tb_start + tb->size; |
1132 |
} else {
|
1133 |
tb_start = tb->page_addr[1];
|
1134 |
tb_end = tb_start + ((tb->pc + tb->size) & ~TARGET_PAGE_MASK); |
1135 |
} |
1136 |
if (!(tb_end <= start || tb_start >= end)) {
|
1137 |
#ifdef TARGET_HAS_PRECISE_SMC
|
1138 |
if (current_tb_not_found) {
|
1139 |
current_tb_not_found = 0;
|
1140 |
current_tb = NULL;
|
1141 |
if (env->mem_io_pc) {
|
1142 |
/* now we have a real cpu fault */
|
1143 |
current_tb = tb_find_pc(env->mem_io_pc); |
1144 |
} |
1145 |
} |
1146 |
if (current_tb == tb &&
|
1147 |
(current_tb->cflags & CF_COUNT_MASK) != 1) {
|
1148 |
/* If we are modifying the current TB, we must stop
|
1149 |
its execution. We could be more precise by checking
|
1150 |
that the modification is after the current PC, but it
|
1151 |
would require a specialized function to partially
|
1152 |
restore the CPU state */
|
1153 |
|
1154 |
current_tb_modified = 1;
|
1155 |
cpu_restore_state(current_tb, env, env->mem_io_pc); |
1156 |
cpu_get_tb_cpu_state(env, ¤t_pc, ¤t_cs_base, |
1157 |
¤t_flags); |
1158 |
} |
1159 |
#endif /* TARGET_HAS_PRECISE_SMC */ |
1160 |
/* we need to do that to handle the case where a signal
|
1161 |
occurs while doing tb_phys_invalidate() */
|
1162 |
saved_tb = NULL;
|
1163 |
if (env) {
|
1164 |
saved_tb = env->current_tb; |
1165 |
env->current_tb = NULL;
|
1166 |
} |
1167 |
tb_phys_invalidate(tb, -1);
|
1168 |
if (env) {
|
1169 |
env->current_tb = saved_tb; |
1170 |
if (env->interrupt_request && env->current_tb)
|
1171 |
cpu_interrupt(env, env->interrupt_request); |
1172 |
} |
1173 |
} |
1174 |
tb = tb_next; |
1175 |
} |
1176 |
#if !defined(CONFIG_USER_ONLY)
|
1177 |
/* if no code remaining, no need to continue to use slow writes */
|
1178 |
if (!p->first_tb) {
|
1179 |
invalidate_page_bitmap(p); |
1180 |
if (is_cpu_write_access) {
|
1181 |
tlb_unprotect_code_phys(env, start, env->mem_io_vaddr); |
1182 |
} |
1183 |
} |
1184 |
#endif
|
1185 |
#ifdef TARGET_HAS_PRECISE_SMC
|
1186 |
if (current_tb_modified) {
|
1187 |
/* we generate a block containing just the instruction
|
1188 |
modifying the memory. It will ensure that it cannot modify
|
1189 |
itself */
|
1190 |
env->current_tb = NULL;
|
1191 |
tb_gen_code(env, current_pc, current_cs_base, current_flags, 1);
|
1192 |
cpu_resume_from_signal(env, NULL);
|
1193 |
} |
1194 |
#endif
|
1195 |
} |
1196 |
|
1197 |
/* len must be <= 8 and start must be a multiple of len */
|
1198 |
static inline void tb_invalidate_phys_page_fast(tb_page_addr_t start, int len) |
1199 |
{ |
1200 |
PageDesc *p; |
1201 |
int offset, b;
|
1202 |
#if 0
|
1203 |
if (1) {
|
1204 |
qemu_log("modifying code at 0x%x size=%d EIP=%x PC=%08x\n",
|
1205 |
cpu_single_env->mem_io_vaddr, len,
|
1206 |
cpu_single_env->eip,
|
1207 |
cpu_single_env->eip + (long)cpu_single_env->segs[R_CS].base);
|
1208 |
}
|
1209 |
#endif
|
1210 |
p = page_find(start >> TARGET_PAGE_BITS); |
1211 |
if (!p)
|
1212 |
return;
|
1213 |
if (p->code_bitmap) {
|
1214 |
offset = start & ~TARGET_PAGE_MASK; |
1215 |
b = p->code_bitmap[offset >> 3] >> (offset & 7); |
1216 |
if (b & ((1 << len) - 1)) |
1217 |
goto do_invalidate;
|
1218 |
} else {
|
1219 |
do_invalidate:
|
1220 |
tb_invalidate_phys_page_range(start, start + len, 1);
|
1221 |
} |
1222 |
} |
1223 |
|
1224 |
#if !defined(CONFIG_SOFTMMU)
|
1225 |
static void tb_invalidate_phys_page(tb_page_addr_t addr, |
1226 |
unsigned long pc, void *puc) |
1227 |
{ |
1228 |
TranslationBlock *tb; |
1229 |
PageDesc *p; |
1230 |
int n;
|
1231 |
#ifdef TARGET_HAS_PRECISE_SMC
|
1232 |
TranslationBlock *current_tb = NULL;
|
1233 |
CPUState *env = cpu_single_env; |
1234 |
int current_tb_modified = 0; |
1235 |
target_ulong current_pc = 0;
|
1236 |
target_ulong current_cs_base = 0;
|
1237 |
int current_flags = 0; |
1238 |
#endif
|
1239 |
|
1240 |
addr &= TARGET_PAGE_MASK; |
1241 |
p = page_find(addr >> TARGET_PAGE_BITS); |
1242 |
if (!p)
|
1243 |
return;
|
1244 |
tb = p->first_tb; |
1245 |
#ifdef TARGET_HAS_PRECISE_SMC
|
1246 |
if (tb && pc != 0) { |
1247 |
current_tb = tb_find_pc(pc); |
1248 |
} |
1249 |
#endif
|
1250 |
while (tb != NULL) { |
1251 |
n = (long)tb & 3; |
1252 |
tb = (TranslationBlock *)((long)tb & ~3); |
1253 |
#ifdef TARGET_HAS_PRECISE_SMC
|
1254 |
if (current_tb == tb &&
|
1255 |
(current_tb->cflags & CF_COUNT_MASK) != 1) {
|
1256 |
/* If we are modifying the current TB, we must stop
|
1257 |
its execution. We could be more precise by checking
|
1258 |
that the modification is after the current PC, but it
|
1259 |
would require a specialized function to partially
|
1260 |
restore the CPU state */
|
1261 |
|
1262 |
current_tb_modified = 1;
|
1263 |
cpu_restore_state(current_tb, env, pc); |
1264 |
cpu_get_tb_cpu_state(env, ¤t_pc, ¤t_cs_base, |
1265 |
¤t_flags); |
1266 |
} |
1267 |
#endif /* TARGET_HAS_PRECISE_SMC */ |
1268 |
tb_phys_invalidate(tb, addr); |
1269 |
tb = tb->page_next[n]; |
1270 |
} |
1271 |
p->first_tb = NULL;
|
1272 |
#ifdef TARGET_HAS_PRECISE_SMC
|
1273 |
if (current_tb_modified) {
|
1274 |
/* we generate a block containing just the instruction
|
1275 |
modifying the memory. It will ensure that it cannot modify
|
1276 |
itself */
|
1277 |
env->current_tb = NULL;
|
1278 |
tb_gen_code(env, current_pc, current_cs_base, current_flags, 1);
|
1279 |
cpu_resume_from_signal(env, puc); |
1280 |
} |
1281 |
#endif
|
1282 |
} |
1283 |
#endif
|
1284 |
|
1285 |
/* add the tb in the target page and protect it if necessary */
|
1286 |
static inline void tb_alloc_page(TranslationBlock *tb, |
1287 |
unsigned int n, tb_page_addr_t page_addr) |
1288 |
{ |
1289 |
PageDesc *p; |
1290 |
#ifndef CONFIG_USER_ONLY
|
1291 |
bool page_already_protected;
|
1292 |
#endif
|
1293 |
|
1294 |
tb->page_addr[n] = page_addr; |
1295 |
p = page_find_alloc(page_addr >> TARGET_PAGE_BITS, 1);
|
1296 |
tb->page_next[n] = p->first_tb; |
1297 |
#ifndef CONFIG_USER_ONLY
|
1298 |
page_already_protected = p->first_tb != NULL;
|
1299 |
#endif
|
1300 |
p->first_tb = (TranslationBlock *)((long)tb | n);
|
1301 |
invalidate_page_bitmap(p); |
1302 |
|
1303 |
#if defined(TARGET_HAS_SMC) || 1 |
1304 |
|
1305 |
#if defined(CONFIG_USER_ONLY)
|
1306 |
if (p->flags & PAGE_WRITE) {
|
1307 |
target_ulong addr; |
1308 |
PageDesc *p2; |
1309 |
int prot;
|
1310 |
|
1311 |
/* force the host page as non writable (writes will have a
|
1312 |
page fault + mprotect overhead) */
|
1313 |
page_addr &= qemu_host_page_mask; |
1314 |
prot = 0;
|
1315 |
for(addr = page_addr; addr < page_addr + qemu_host_page_size;
|
1316 |
addr += TARGET_PAGE_SIZE) { |
1317 |
|
1318 |
p2 = page_find (addr >> TARGET_PAGE_BITS); |
1319 |
if (!p2)
|
1320 |
continue;
|
1321 |
prot |= p2->flags; |
1322 |
p2->flags &= ~PAGE_WRITE; |
1323 |
} |
1324 |
mprotect(g2h(page_addr), qemu_host_page_size, |
1325 |
(prot & PAGE_BITS) & ~PAGE_WRITE); |
1326 |
#ifdef DEBUG_TB_INVALIDATE
|
1327 |
printf("protecting code page: 0x" TARGET_FMT_lx "\n", |
1328 |
page_addr); |
1329 |
#endif
|
1330 |
} |
1331 |
#else
|
1332 |
/* if some code is already present, then the pages are already
|
1333 |
protected. So we handle the case where only the first TB is
|
1334 |
allocated in a physical page */
|
1335 |
if (!page_already_protected) {
|
1336 |
tlb_protect_code(page_addr); |
1337 |
} |
1338 |
#endif
|
1339 |
|
1340 |
#endif /* TARGET_HAS_SMC */ |
1341 |
} |
1342 |
|
1343 |
/* add a new TB and link it to the physical page tables. phys_page2 is
|
1344 |
(-1) to indicate that only one page contains the TB. */
|
1345 |
void tb_link_page(TranslationBlock *tb,
|
1346 |
tb_page_addr_t phys_pc, tb_page_addr_t phys_page2) |
1347 |
{ |
1348 |
unsigned int h; |
1349 |
TranslationBlock **ptb; |
1350 |
|
1351 |
/* Grab the mmap lock to stop another thread invalidating this TB
|
1352 |
before we are done. */
|
1353 |
mmap_lock(); |
1354 |
/* add in the physical hash table */
|
1355 |
h = tb_phys_hash_func(phys_pc); |
1356 |
ptb = &tb_phys_hash[h]; |
1357 |
tb->phys_hash_next = *ptb; |
1358 |
*ptb = tb; |
1359 |
|
1360 |
/* add in the page list */
|
1361 |
tb_alloc_page(tb, 0, phys_pc & TARGET_PAGE_MASK);
|
1362 |
if (phys_page2 != -1) |
1363 |
tb_alloc_page(tb, 1, phys_page2);
|
1364 |
else
|
1365 |
tb->page_addr[1] = -1; |
1366 |
|
1367 |
tb->jmp_first = (TranslationBlock *)((long)tb | 2); |
1368 |
tb->jmp_next[0] = NULL; |
1369 |
tb->jmp_next[1] = NULL; |
1370 |
|
1371 |
/* init original jump addresses */
|
1372 |
if (tb->tb_next_offset[0] != 0xffff) |
1373 |
tb_reset_jump(tb, 0);
|
1374 |
if (tb->tb_next_offset[1] != 0xffff) |
1375 |
tb_reset_jump(tb, 1);
|
1376 |
|
1377 |
#ifdef DEBUG_TB_CHECK
|
1378 |
tb_page_check(); |
1379 |
#endif
|
1380 |
mmap_unlock(); |
1381 |
} |
1382 |
|
1383 |
/* find the TB 'tb' such that tb[0].tc_ptr <= tc_ptr <
|
1384 |
tb[1].tc_ptr. Return NULL if not found */
|
1385 |
TranslationBlock *tb_find_pc(unsigned long tc_ptr) |
1386 |
{ |
1387 |
int m_min, m_max, m;
|
1388 |
unsigned long v; |
1389 |
TranslationBlock *tb; |
1390 |
|
1391 |
if (nb_tbs <= 0) |
1392 |
return NULL; |
1393 |
if (tc_ptr < (unsigned long)code_gen_buffer || |
1394 |
tc_ptr >= (unsigned long)code_gen_ptr) |
1395 |
return NULL; |
1396 |
/* binary search (cf Knuth) */
|
1397 |
m_min = 0;
|
1398 |
m_max = nb_tbs - 1;
|
1399 |
while (m_min <= m_max) {
|
1400 |
m = (m_min + m_max) >> 1;
|
1401 |
tb = &tbs[m]; |
1402 |
v = (unsigned long)tb->tc_ptr; |
1403 |
if (v == tc_ptr)
|
1404 |
return tb;
|
1405 |
else if (tc_ptr < v) { |
1406 |
m_max = m - 1;
|
1407 |
} else {
|
1408 |
m_min = m + 1;
|
1409 |
} |
1410 |
} |
1411 |
return &tbs[m_max];
|
1412 |
} |
1413 |
|
1414 |
static void tb_reset_jump_recursive(TranslationBlock *tb); |
1415 |
|
1416 |
static inline void tb_reset_jump_recursive2(TranslationBlock *tb, int n) |
1417 |
{ |
1418 |
TranslationBlock *tb1, *tb_next, **ptb; |
1419 |
unsigned int n1; |
1420 |
|
1421 |
tb1 = tb->jmp_next[n]; |
1422 |
if (tb1 != NULL) { |
1423 |
/* find head of list */
|
1424 |
for(;;) {
|
1425 |
n1 = (long)tb1 & 3; |
1426 |
tb1 = (TranslationBlock *)((long)tb1 & ~3); |
1427 |
if (n1 == 2) |
1428 |
break;
|
1429 |
tb1 = tb1->jmp_next[n1]; |
1430 |
} |
1431 |
/* we are now sure now that tb jumps to tb1 */
|
1432 |
tb_next = tb1; |
1433 |
|
1434 |
/* remove tb from the jmp_first list */
|
1435 |
ptb = &tb_next->jmp_first; |
1436 |
for(;;) {
|
1437 |
tb1 = *ptb; |
1438 |
n1 = (long)tb1 & 3; |
1439 |
tb1 = (TranslationBlock *)((long)tb1 & ~3); |
1440 |
if (n1 == n && tb1 == tb)
|
1441 |
break;
|
1442 |
ptb = &tb1->jmp_next[n1]; |
1443 |
} |
1444 |
*ptb = tb->jmp_next[n]; |
1445 |
tb->jmp_next[n] = NULL;
|
1446 |
|
1447 |
/* suppress the jump to next tb in generated code */
|
1448 |
tb_reset_jump(tb, n); |
1449 |
|
1450 |
/* suppress jumps in the tb on which we could have jumped */
|
1451 |
tb_reset_jump_recursive(tb_next); |
1452 |
} |
1453 |
} |
1454 |
|
1455 |
static void tb_reset_jump_recursive(TranslationBlock *tb) |
1456 |
{ |
1457 |
tb_reset_jump_recursive2(tb, 0);
|
1458 |
tb_reset_jump_recursive2(tb, 1);
|
1459 |
} |
1460 |
|
1461 |
#if defined(TARGET_HAS_ICE)
|
1462 |
#if defined(CONFIG_USER_ONLY)
|
1463 |
static void breakpoint_invalidate(CPUState *env, target_ulong pc) |
1464 |
{ |
1465 |
tb_invalidate_phys_page_range(pc, pc + 1, 0); |
1466 |
} |
1467 |
#else
|
1468 |
static void breakpoint_invalidate(CPUState *env, target_ulong pc) |
1469 |
{ |
1470 |
target_phys_addr_t addr; |
1471 |
ram_addr_t ram_addr; |
1472 |
MemoryRegionSection *section; |
1473 |
|
1474 |
addr = cpu_get_phys_page_debug(env, pc); |
1475 |
section = phys_page_find(addr >> TARGET_PAGE_BITS); |
1476 |
if (!(memory_region_is_ram(section->mr)
|
1477 |
|| (section->mr->rom_device && section->mr->readable))) { |
1478 |
return;
|
1479 |
} |
1480 |
ram_addr = (memory_region_get_ram_addr(section->mr) & TARGET_PAGE_MASK) |
1481 |
+ section_addr(section, addr); |
1482 |
tb_invalidate_phys_page_range(ram_addr, ram_addr + 1, 0); |
1483 |
} |
1484 |
#endif
|
1485 |
#endif /* TARGET_HAS_ICE */ |
1486 |
|
1487 |
#if defined(CONFIG_USER_ONLY)
|
1488 |
void cpu_watchpoint_remove_all(CPUState *env, int mask) |
1489 |
|
1490 |
{ |
1491 |
} |
1492 |
|
1493 |
int cpu_watchpoint_insert(CPUState *env, target_ulong addr, target_ulong len,
|
1494 |
int flags, CPUWatchpoint **watchpoint)
|
1495 |
{ |
1496 |
return -ENOSYS;
|
1497 |
} |
1498 |
#else
|
1499 |
/* Add a watchpoint. */
|
1500 |
int cpu_watchpoint_insert(CPUState *env, target_ulong addr, target_ulong len,
|
1501 |
int flags, CPUWatchpoint **watchpoint)
|
1502 |
{ |
1503 |
target_ulong len_mask = ~(len - 1);
|
1504 |
CPUWatchpoint *wp; |
1505 |
|
1506 |
/* sanity checks: allow power-of-2 lengths, deny unaligned watchpoints */
|
1507 |
if ((len & (len - 1)) || (addr & ~len_mask) || |
1508 |
len == 0 || len > TARGET_PAGE_SIZE) {
|
1509 |
fprintf(stderr, "qemu: tried to set invalid watchpoint at "
|
1510 |
TARGET_FMT_lx ", len=" TARGET_FMT_lu "\n", addr, len); |
1511 |
return -EINVAL;
|
1512 |
} |
1513 |
wp = g_malloc(sizeof(*wp));
|
1514 |
|
1515 |
wp->vaddr = addr; |
1516 |
wp->len_mask = len_mask; |
1517 |
wp->flags = flags; |
1518 |
|
1519 |
/* keep all GDB-injected watchpoints in front */
|
1520 |
if (flags & BP_GDB)
|
1521 |
QTAILQ_INSERT_HEAD(&env->watchpoints, wp, entry); |
1522 |
else
|
1523 |
QTAILQ_INSERT_TAIL(&env->watchpoints, wp, entry); |
1524 |
|
1525 |
tlb_flush_page(env, addr); |
1526 |
|
1527 |
if (watchpoint)
|
1528 |
*watchpoint = wp; |
1529 |
return 0; |
1530 |
} |
1531 |
|
1532 |
/* Remove a specific watchpoint. */
|
1533 |
int cpu_watchpoint_remove(CPUState *env, target_ulong addr, target_ulong len,
|
1534 |
int flags)
|
1535 |
{ |
1536 |
target_ulong len_mask = ~(len - 1);
|
1537 |
CPUWatchpoint *wp; |
1538 |
|
1539 |
QTAILQ_FOREACH(wp, &env->watchpoints, entry) { |
1540 |
if (addr == wp->vaddr && len_mask == wp->len_mask
|
1541 |
&& flags == (wp->flags & ~BP_WATCHPOINT_HIT)) { |
1542 |
cpu_watchpoint_remove_by_ref(env, wp); |
1543 |
return 0; |
1544 |
} |
1545 |
} |
1546 |
return -ENOENT;
|
1547 |
} |
1548 |
|
1549 |
/* Remove a specific watchpoint by reference. */
|
1550 |
void cpu_watchpoint_remove_by_ref(CPUState *env, CPUWatchpoint *watchpoint)
|
1551 |
{ |
1552 |
QTAILQ_REMOVE(&env->watchpoints, watchpoint, entry); |
1553 |
|
1554 |
tlb_flush_page(env, watchpoint->vaddr); |
1555 |
|
1556 |
g_free(watchpoint); |
1557 |
} |
1558 |
|
1559 |
/* Remove all matching watchpoints. */
|
1560 |
void cpu_watchpoint_remove_all(CPUState *env, int mask) |
1561 |
{ |
1562 |
CPUWatchpoint *wp, *next; |
1563 |
|
1564 |
QTAILQ_FOREACH_SAFE(wp, &env->watchpoints, entry, next) { |
1565 |
if (wp->flags & mask)
|
1566 |
cpu_watchpoint_remove_by_ref(env, wp); |
1567 |
} |
1568 |
} |
1569 |
#endif
|
1570 |
|
1571 |
/* Add a breakpoint. */
|
1572 |
int cpu_breakpoint_insert(CPUState *env, target_ulong pc, int flags, |
1573 |
CPUBreakpoint **breakpoint) |
1574 |
{ |
1575 |
#if defined(TARGET_HAS_ICE)
|
1576 |
CPUBreakpoint *bp; |
1577 |
|
1578 |
bp = g_malloc(sizeof(*bp));
|
1579 |
|
1580 |
bp->pc = pc; |
1581 |
bp->flags = flags; |
1582 |
|
1583 |
/* keep all GDB-injected breakpoints in front */
|
1584 |
if (flags & BP_GDB)
|
1585 |
QTAILQ_INSERT_HEAD(&env->breakpoints, bp, entry); |
1586 |
else
|
1587 |
QTAILQ_INSERT_TAIL(&env->breakpoints, bp, entry); |
1588 |
|
1589 |
breakpoint_invalidate(env, pc); |
1590 |
|
1591 |
if (breakpoint)
|
1592 |
*breakpoint = bp; |
1593 |
return 0; |
1594 |
#else
|
1595 |
return -ENOSYS;
|
1596 |
#endif
|
1597 |
} |
1598 |
|
1599 |
/* Remove a specific breakpoint. */
|
1600 |
int cpu_breakpoint_remove(CPUState *env, target_ulong pc, int flags) |
1601 |
{ |
1602 |
#if defined(TARGET_HAS_ICE)
|
1603 |
CPUBreakpoint *bp; |
1604 |
|
1605 |
QTAILQ_FOREACH(bp, &env->breakpoints, entry) { |
1606 |
if (bp->pc == pc && bp->flags == flags) {
|
1607 |
cpu_breakpoint_remove_by_ref(env, bp); |
1608 |
return 0; |
1609 |
} |
1610 |
} |
1611 |
return -ENOENT;
|
1612 |
#else
|
1613 |
return -ENOSYS;
|
1614 |
#endif
|
1615 |
} |
1616 |
|
1617 |
/* Remove a specific breakpoint by reference. */
|
1618 |
void cpu_breakpoint_remove_by_ref(CPUState *env, CPUBreakpoint *breakpoint)
|
1619 |
{ |
1620 |
#if defined(TARGET_HAS_ICE)
|
1621 |
QTAILQ_REMOVE(&env->breakpoints, breakpoint, entry); |
1622 |
|
1623 |
breakpoint_invalidate(env, breakpoint->pc); |
1624 |
|
1625 |
g_free(breakpoint); |
1626 |
#endif
|
1627 |
} |
1628 |
|
1629 |
/* Remove all matching breakpoints. */
|
1630 |
void cpu_breakpoint_remove_all(CPUState *env, int mask) |
1631 |
{ |
1632 |
#if defined(TARGET_HAS_ICE)
|
1633 |
CPUBreakpoint *bp, *next; |
1634 |
|
1635 |
QTAILQ_FOREACH_SAFE(bp, &env->breakpoints, entry, next) { |
1636 |
if (bp->flags & mask)
|
1637 |
cpu_breakpoint_remove_by_ref(env, bp); |
1638 |
} |
1639 |
#endif
|
1640 |
} |
1641 |
|
1642 |
/* enable or disable single step mode. EXCP_DEBUG is returned by the
|
1643 |
CPU loop after each instruction */
|
1644 |
void cpu_single_step(CPUState *env, int enabled) |
1645 |
{ |
1646 |
#if defined(TARGET_HAS_ICE)
|
1647 |
if (env->singlestep_enabled != enabled) {
|
1648 |
env->singlestep_enabled = enabled; |
1649 |
if (kvm_enabled())
|
1650 |
kvm_update_guest_debug(env, 0);
|
1651 |
else {
|
1652 |
/* must flush all the translated code to avoid inconsistencies */
|
1653 |
/* XXX: only flush what is necessary */
|
1654 |
tb_flush(env); |
1655 |
} |
1656 |
} |
1657 |
#endif
|
1658 |
} |
1659 |
|
1660 |
/* enable or disable low levels log */
|
1661 |
void cpu_set_log(int log_flags) |
1662 |
{ |
1663 |
loglevel = log_flags; |
1664 |
if (loglevel && !logfile) {
|
1665 |
logfile = fopen(logfilename, log_append ? "a" : "w"); |
1666 |
if (!logfile) {
|
1667 |
perror(logfilename); |
1668 |
_exit(1);
|
1669 |
} |
1670 |
#if !defined(CONFIG_SOFTMMU)
|
1671 |
/* must avoid mmap() usage of glibc by setting a buffer "by hand" */
|
1672 |
{ |
1673 |
static char logfile_buf[4096]; |
1674 |
setvbuf(logfile, logfile_buf, _IOLBF, sizeof(logfile_buf));
|
1675 |
} |
1676 |
#elif defined(_WIN32)
|
1677 |
/* Win32 doesn't support line-buffering, so use unbuffered output. */
|
1678 |
setvbuf(logfile, NULL, _IONBF, 0); |
1679 |
#else
|
1680 |
setvbuf(logfile, NULL, _IOLBF, 0); |
1681 |
#endif
|
1682 |
log_append = 1;
|
1683 |
} |
1684 |
if (!loglevel && logfile) {
|
1685 |
fclose(logfile); |
1686 |
logfile = NULL;
|
1687 |
} |
1688 |
} |
1689 |
|
1690 |
void cpu_set_log_filename(const char *filename) |
1691 |
{ |
1692 |
logfilename = strdup(filename); |
1693 |
if (logfile) {
|
1694 |
fclose(logfile); |
1695 |
logfile = NULL;
|
1696 |
} |
1697 |
cpu_set_log(loglevel); |
1698 |
} |
1699 |
|
1700 |
static void cpu_unlink_tb(CPUState *env) |
1701 |
{ |
1702 |
/* FIXME: TB unchaining isn't SMP safe. For now just ignore the
|
1703 |
problem and hope the cpu will stop of its own accord. For userspace
|
1704 |
emulation this often isn't actually as bad as it sounds. Often
|
1705 |
signals are used primarily to interrupt blocking syscalls. */
|
1706 |
TranslationBlock *tb; |
1707 |
static spinlock_t interrupt_lock = SPIN_LOCK_UNLOCKED;
|
1708 |
|
1709 |
spin_lock(&interrupt_lock); |
1710 |
tb = env->current_tb; |
1711 |
/* if the cpu is currently executing code, we must unlink it and
|
1712 |
all the potentially executing TB */
|
1713 |
if (tb) {
|
1714 |
env->current_tb = NULL;
|
1715 |
tb_reset_jump_recursive(tb); |
1716 |
} |
1717 |
spin_unlock(&interrupt_lock); |
1718 |
} |
1719 |
|
1720 |
#ifndef CONFIG_USER_ONLY
|
1721 |
/* mask must never be zero, except for A20 change call */
|
1722 |
static void tcg_handle_interrupt(CPUState *env, int mask) |
1723 |
{ |
1724 |
int old_mask;
|
1725 |
|
1726 |
old_mask = env->interrupt_request; |
1727 |
env->interrupt_request |= mask; |
1728 |
|
1729 |
/*
|
1730 |
* If called from iothread context, wake the target cpu in
|
1731 |
* case its halted.
|
1732 |
*/
|
1733 |
if (!qemu_cpu_is_self(env)) {
|
1734 |
qemu_cpu_kick(env); |
1735 |
return;
|
1736 |
} |
1737 |
|
1738 |
if (use_icount) {
|
1739 |
env->icount_decr.u16.high = 0xffff;
|
1740 |
if (!can_do_io(env)
|
1741 |
&& (mask & ~old_mask) != 0) {
|
1742 |
cpu_abort(env, "Raised interrupt while not in I/O function");
|
1743 |
} |
1744 |
} else {
|
1745 |
cpu_unlink_tb(env); |
1746 |
} |
1747 |
} |
1748 |
|
1749 |
CPUInterruptHandler cpu_interrupt_handler = tcg_handle_interrupt; |
1750 |
|
1751 |
#else /* CONFIG_USER_ONLY */ |
1752 |
|
1753 |
void cpu_interrupt(CPUState *env, int mask) |
1754 |
{ |
1755 |
env->interrupt_request |= mask; |
1756 |
cpu_unlink_tb(env); |
1757 |
} |
1758 |
#endif /* CONFIG_USER_ONLY */ |
1759 |
|
1760 |
void cpu_reset_interrupt(CPUState *env, int mask) |
1761 |
{ |
1762 |
env->interrupt_request &= ~mask; |
1763 |
} |
1764 |
|
1765 |
void cpu_exit(CPUState *env)
|
1766 |
{ |
1767 |
env->exit_request = 1;
|
1768 |
cpu_unlink_tb(env); |
1769 |
} |
1770 |
|
1771 |
const CPULogItem cpu_log_items[] = {
|
1772 |
{ CPU_LOG_TB_OUT_ASM, "out_asm",
|
1773 |
"show generated host assembly code for each compiled TB" },
|
1774 |
{ CPU_LOG_TB_IN_ASM, "in_asm",
|
1775 |
"show target assembly code for each compiled TB" },
|
1776 |
{ CPU_LOG_TB_OP, "op",
|
1777 |
"show micro ops for each compiled TB" },
|
1778 |
{ CPU_LOG_TB_OP_OPT, "op_opt",
|
1779 |
"show micro ops "
|
1780 |
#ifdef TARGET_I386
|
1781 |
"before eflags optimization and "
|
1782 |
#endif
|
1783 |
"after liveness analysis" },
|
1784 |
{ CPU_LOG_INT, "int",
|
1785 |
"show interrupts/exceptions in short format" },
|
1786 |
{ CPU_LOG_EXEC, "exec",
|
1787 |
"show trace before each executed TB (lots of logs)" },
|
1788 |
{ CPU_LOG_TB_CPU, "cpu",
|
1789 |
"show CPU state before block translation" },
|
1790 |
#ifdef TARGET_I386
|
1791 |
{ CPU_LOG_PCALL, "pcall",
|
1792 |
"show protected mode far calls/returns/exceptions" },
|
1793 |
{ CPU_LOG_RESET, "cpu_reset",
|
1794 |
"show CPU state before CPU resets" },
|
1795 |
#endif
|
1796 |
#ifdef DEBUG_IOPORT
|
1797 |
{ CPU_LOG_IOPORT, "ioport",
|
1798 |
"show all i/o ports accesses" },
|
1799 |
#endif
|
1800 |
{ 0, NULL, NULL }, |
1801 |
}; |
1802 |
|
1803 |
static int cmp1(const char *s1, int n, const char *s2) |
1804 |
{ |
1805 |
if (strlen(s2) != n)
|
1806 |
return 0; |
1807 |
return memcmp(s1, s2, n) == 0; |
1808 |
} |
1809 |
|
1810 |
/* takes a comma separated list of log masks. Return 0 if error. */
|
1811 |
int cpu_str_to_log_mask(const char *str) |
1812 |
{ |
1813 |
const CPULogItem *item;
|
1814 |
int mask;
|
1815 |
const char *p, *p1; |
1816 |
|
1817 |
p = str; |
1818 |
mask = 0;
|
1819 |
for(;;) {
|
1820 |
p1 = strchr(p, ',');
|
1821 |
if (!p1)
|
1822 |
p1 = p + strlen(p); |
1823 |
if(cmp1(p,p1-p,"all")) { |
1824 |
for(item = cpu_log_items; item->mask != 0; item++) { |
1825 |
mask |= item->mask; |
1826 |
} |
1827 |
} else {
|
1828 |
for(item = cpu_log_items; item->mask != 0; item++) { |
1829 |
if (cmp1(p, p1 - p, item->name))
|
1830 |
goto found;
|
1831 |
} |
1832 |
return 0; |
1833 |
} |
1834 |
found:
|
1835 |
mask |= item->mask; |
1836 |
if (*p1 != ',') |
1837 |
break;
|
1838 |
p = p1 + 1;
|
1839 |
} |
1840 |
return mask;
|
1841 |
} |
1842 |
|
1843 |
void cpu_abort(CPUState *env, const char *fmt, ...) |
1844 |
{ |
1845 |
va_list ap; |
1846 |
va_list ap2; |
1847 |
|
1848 |
va_start(ap, fmt); |
1849 |
va_copy(ap2, ap); |
1850 |
fprintf(stderr, "qemu: fatal: ");
|
1851 |
vfprintf(stderr, fmt, ap); |
1852 |
fprintf(stderr, "\n");
|
1853 |
#ifdef TARGET_I386
|
1854 |
cpu_dump_state(env, stderr, fprintf, X86_DUMP_FPU | X86_DUMP_CCOP); |
1855 |
#else
|
1856 |
cpu_dump_state(env, stderr, fprintf, 0);
|
1857 |
#endif
|
1858 |
if (qemu_log_enabled()) {
|
1859 |
qemu_log("qemu: fatal: ");
|
1860 |
qemu_log_vprintf(fmt, ap2); |
1861 |
qemu_log("\n");
|
1862 |
#ifdef TARGET_I386
|
1863 |
log_cpu_state(env, X86_DUMP_FPU | X86_DUMP_CCOP); |
1864 |
#else
|
1865 |
log_cpu_state(env, 0);
|
1866 |
#endif
|
1867 |
qemu_log_flush(); |
1868 |
qemu_log_close(); |
1869 |
} |
1870 |
va_end(ap2); |
1871 |
va_end(ap); |
1872 |
#if defined(CONFIG_USER_ONLY)
|
1873 |
{ |
1874 |
struct sigaction act;
|
1875 |
sigfillset(&act.sa_mask); |
1876 |
act.sa_handler = SIG_DFL; |
1877 |
sigaction(SIGABRT, &act, NULL);
|
1878 |
} |
1879 |
#endif
|
1880 |
abort(); |
1881 |
} |
1882 |
|
1883 |
CPUState *cpu_copy(CPUState *env) |
1884 |
{ |
1885 |
CPUState *new_env = cpu_init(env->cpu_model_str); |
1886 |
CPUState *next_cpu = new_env->next_cpu; |
1887 |
int cpu_index = new_env->cpu_index;
|
1888 |
#if defined(TARGET_HAS_ICE)
|
1889 |
CPUBreakpoint *bp; |
1890 |
CPUWatchpoint *wp; |
1891 |
#endif
|
1892 |
|
1893 |
memcpy(new_env, env, sizeof(CPUState));
|
1894 |
|
1895 |
/* Preserve chaining and index. */
|
1896 |
new_env->next_cpu = next_cpu; |
1897 |
new_env->cpu_index = cpu_index; |
1898 |
|
1899 |
/* Clone all break/watchpoints.
|
1900 |
Note: Once we support ptrace with hw-debug register access, make sure
|
1901 |
BP_CPU break/watchpoints are handled correctly on clone. */
|
1902 |
QTAILQ_INIT(&env->breakpoints); |
1903 |
QTAILQ_INIT(&env->watchpoints); |
1904 |
#if defined(TARGET_HAS_ICE)
|
1905 |
QTAILQ_FOREACH(bp, &env->breakpoints, entry) { |
1906 |
cpu_breakpoint_insert(new_env, bp->pc, bp->flags, NULL);
|
1907 |
} |
1908 |
QTAILQ_FOREACH(wp, &env->watchpoints, entry) { |
1909 |
cpu_watchpoint_insert(new_env, wp->vaddr, (~wp->len_mask) + 1,
|
1910 |
wp->flags, NULL);
|
1911 |
} |
1912 |
#endif
|
1913 |
|
1914 |
return new_env;
|
1915 |
} |
1916 |
|
1917 |
#if !defined(CONFIG_USER_ONLY)
|
1918 |
|
1919 |
static inline void tlb_flush_jmp_cache(CPUState *env, target_ulong addr) |
1920 |
{ |
1921 |
unsigned int i; |
1922 |
|
1923 |
/* Discard jump cache entries for any tb which might potentially
|
1924 |
overlap the flushed page. */
|
1925 |
i = tb_jmp_cache_hash_page(addr - TARGET_PAGE_SIZE); |
1926 |
memset (&env->tb_jmp_cache[i], 0,
|
1927 |
TB_JMP_PAGE_SIZE * sizeof(TranslationBlock *));
|
1928 |
|
1929 |
i = tb_jmp_cache_hash_page(addr); |
1930 |
memset (&env->tb_jmp_cache[i], 0,
|
1931 |
TB_JMP_PAGE_SIZE * sizeof(TranslationBlock *));
|
1932 |
} |
1933 |
|
1934 |
static CPUTLBEntry s_cputlb_empty_entry = {
|
1935 |
.addr_read = -1,
|
1936 |
.addr_write = -1,
|
1937 |
.addr_code = -1,
|
1938 |
.addend = -1,
|
1939 |
}; |
1940 |
|
1941 |
/* NOTE:
|
1942 |
* If flush_global is true (the usual case), flush all tlb entries.
|
1943 |
* If flush_global is false, flush (at least) all tlb entries not
|
1944 |
* marked global.
|
1945 |
*
|
1946 |
* Since QEMU doesn't currently implement a global/not-global flag
|
1947 |
* for tlb entries, at the moment tlb_flush() will also flush all
|
1948 |
* tlb entries in the flush_global == false case. This is OK because
|
1949 |
* CPU architectures generally permit an implementation to drop
|
1950 |
* entries from the TLB at any time, so flushing more entries than
|
1951 |
* required is only an efficiency issue, not a correctness issue.
|
1952 |
*/
|
1953 |
void tlb_flush(CPUState *env, int flush_global) |
1954 |
{ |
1955 |
int i;
|
1956 |
|
1957 |
#if defined(DEBUG_TLB)
|
1958 |
printf("tlb_flush:\n");
|
1959 |
#endif
|
1960 |
/* must reset current TB so that interrupts cannot modify the
|
1961 |
links while we are modifying them */
|
1962 |
env->current_tb = NULL;
|
1963 |
|
1964 |
for(i = 0; i < CPU_TLB_SIZE; i++) { |
1965 |
int mmu_idx;
|
1966 |
for (mmu_idx = 0; mmu_idx < NB_MMU_MODES; mmu_idx++) { |
1967 |
env->tlb_table[mmu_idx][i] = s_cputlb_empty_entry; |
1968 |
} |
1969 |
} |
1970 |
|
1971 |
memset (env->tb_jmp_cache, 0, TB_JMP_CACHE_SIZE * sizeof (void *)); |
1972 |
|
1973 |
env->tlb_flush_addr = -1;
|
1974 |
env->tlb_flush_mask = 0;
|
1975 |
tlb_flush_count++; |
1976 |
} |
1977 |
|
1978 |
static inline void tlb_flush_entry(CPUTLBEntry *tlb_entry, target_ulong addr) |
1979 |
{ |
1980 |
if (addr == (tlb_entry->addr_read &
|
1981 |
(TARGET_PAGE_MASK | TLB_INVALID_MASK)) || |
1982 |
addr == (tlb_entry->addr_write & |
1983 |
(TARGET_PAGE_MASK | TLB_INVALID_MASK)) || |
1984 |
addr == (tlb_entry->addr_code & |
1985 |
(TARGET_PAGE_MASK | TLB_INVALID_MASK))) { |
1986 |
*tlb_entry = s_cputlb_empty_entry; |
1987 |
} |
1988 |
} |
1989 |
|
1990 |
void tlb_flush_page(CPUState *env, target_ulong addr)
|
1991 |
{ |
1992 |
int i;
|
1993 |
int mmu_idx;
|
1994 |
|
1995 |
#if defined(DEBUG_TLB)
|
1996 |
printf("tlb_flush_page: " TARGET_FMT_lx "\n", addr); |
1997 |
#endif
|
1998 |
/* Check if we need to flush due to large pages. */
|
1999 |
if ((addr & env->tlb_flush_mask) == env->tlb_flush_addr) {
|
2000 |
#if defined(DEBUG_TLB)
|
2001 |
printf("tlb_flush_page: forced full flush ("
|
2002 |
TARGET_FMT_lx "/" TARGET_FMT_lx ")\n", |
2003 |
env->tlb_flush_addr, env->tlb_flush_mask); |
2004 |
#endif
|
2005 |
tlb_flush(env, 1);
|
2006 |
return;
|
2007 |
} |
2008 |
/* must reset current TB so that interrupts cannot modify the
|
2009 |
links while we are modifying them */
|
2010 |
env->current_tb = NULL;
|
2011 |
|
2012 |
addr &= TARGET_PAGE_MASK; |
2013 |
i = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
|
2014 |
for (mmu_idx = 0; mmu_idx < NB_MMU_MODES; mmu_idx++) |
2015 |
tlb_flush_entry(&env->tlb_table[mmu_idx][i], addr); |
2016 |
|
2017 |
tlb_flush_jmp_cache(env, addr); |
2018 |
} |
2019 |
|
2020 |
/* update the TLBs so that writes to code in the virtual page 'addr'
|
2021 |
can be detected */
|
2022 |
static void tlb_protect_code(ram_addr_t ram_addr) |
2023 |
{ |
2024 |
cpu_physical_memory_reset_dirty(ram_addr, |
2025 |
ram_addr + TARGET_PAGE_SIZE, |
2026 |
CODE_DIRTY_FLAG); |
2027 |
} |
2028 |
|
2029 |
/* update the TLB so that writes in physical page 'phys_addr' are no longer
|
2030 |
tested for self modifying code */
|
2031 |
static void tlb_unprotect_code_phys(CPUState *env, ram_addr_t ram_addr, |
2032 |
target_ulong vaddr) |
2033 |
{ |
2034 |
cpu_physical_memory_set_dirty_flags(ram_addr, CODE_DIRTY_FLAG); |
2035 |
} |
2036 |
|
2037 |
static inline void tlb_reset_dirty_range(CPUTLBEntry *tlb_entry, |
2038 |
unsigned long start, unsigned long length) |
2039 |
{ |
2040 |
unsigned long addr; |
2041 |
if ((tlb_entry->addr_write & ~TARGET_PAGE_MASK) == io_mem_ram.ram_addr) {
|
2042 |
addr = (tlb_entry->addr_write & TARGET_PAGE_MASK) + tlb_entry->addend; |
2043 |
if ((addr - start) < length) {
|
2044 |
tlb_entry->addr_write = (tlb_entry->addr_write & TARGET_PAGE_MASK) | TLB_NOTDIRTY; |
2045 |
} |
2046 |
} |
2047 |
} |
2048 |
|
2049 |
/* Note: start and end must be within the same ram block. */
|
2050 |
void cpu_physical_memory_reset_dirty(ram_addr_t start, ram_addr_t end,
|
2051 |
int dirty_flags)
|
2052 |
{ |
2053 |
CPUState *env; |
2054 |
unsigned long length, start1; |
2055 |
int i;
|
2056 |
|
2057 |
start &= TARGET_PAGE_MASK; |
2058 |
end = TARGET_PAGE_ALIGN(end); |
2059 |
|
2060 |
length = end - start; |
2061 |
if (length == 0) |
2062 |
return;
|
2063 |
cpu_physical_memory_mask_dirty_range(start, length, dirty_flags); |
2064 |
|
2065 |
/* we modify the TLB cache so that the dirty bit will be set again
|
2066 |
when accessing the range */
|
2067 |
start1 = (unsigned long)qemu_safe_ram_ptr(start); |
2068 |
/* Check that we don't span multiple blocks - this breaks the
|
2069 |
address comparisons below. */
|
2070 |
if ((unsigned long)qemu_safe_ram_ptr(end - 1) - start1 |
2071 |
!= (end - 1) - start) {
|
2072 |
abort(); |
2073 |
} |
2074 |
|
2075 |
for(env = first_cpu; env != NULL; env = env->next_cpu) { |
2076 |
int mmu_idx;
|
2077 |
for (mmu_idx = 0; mmu_idx < NB_MMU_MODES; mmu_idx++) { |
2078 |
for(i = 0; i < CPU_TLB_SIZE; i++) |
2079 |
tlb_reset_dirty_range(&env->tlb_table[mmu_idx][i], |
2080 |
start1, length); |
2081 |
} |
2082 |
} |
2083 |
} |
2084 |
|
2085 |
int cpu_physical_memory_set_dirty_tracking(int enable) |
2086 |
{ |
2087 |
int ret = 0; |
2088 |
in_migration = enable; |
2089 |
return ret;
|
2090 |
} |
2091 |
|
2092 |
static inline void tlb_update_dirty(CPUTLBEntry *tlb_entry) |
2093 |
{ |
2094 |
ram_addr_t ram_addr; |
2095 |
void *p;
|
2096 |
|
2097 |
if ((tlb_entry->addr_write & ~TARGET_PAGE_MASK) == io_mem_ram.ram_addr) {
|
2098 |
p = (void *)(unsigned long)((tlb_entry->addr_write & TARGET_PAGE_MASK) |
2099 |
+ tlb_entry->addend); |
2100 |
ram_addr = qemu_ram_addr_from_host_nofail(p); |
2101 |
if (!cpu_physical_memory_is_dirty(ram_addr)) {
|
2102 |
tlb_entry->addr_write |= TLB_NOTDIRTY; |
2103 |
} |
2104 |
} |
2105 |
} |
2106 |
|
2107 |
/* update the TLB according to the current state of the dirty bits */
|
2108 |
void cpu_tlb_update_dirty(CPUState *env)
|
2109 |
{ |
2110 |
int i;
|
2111 |
int mmu_idx;
|
2112 |
for (mmu_idx = 0; mmu_idx < NB_MMU_MODES; mmu_idx++) { |
2113 |
for(i = 0; i < CPU_TLB_SIZE; i++) |
2114 |
tlb_update_dirty(&env->tlb_table[mmu_idx][i]); |
2115 |
} |
2116 |
} |
2117 |
|
2118 |
static inline void tlb_set_dirty1(CPUTLBEntry *tlb_entry, target_ulong vaddr) |
2119 |
{ |
2120 |
if (tlb_entry->addr_write == (vaddr | TLB_NOTDIRTY))
|
2121 |
tlb_entry->addr_write = vaddr; |
2122 |
} |
2123 |
|
2124 |
/* update the TLB corresponding to virtual page vaddr
|
2125 |
so that it is no longer dirty */
|
2126 |
static inline void tlb_set_dirty(CPUState *env, target_ulong vaddr) |
2127 |
{ |
2128 |
int i;
|
2129 |
int mmu_idx;
|
2130 |
|
2131 |
vaddr &= TARGET_PAGE_MASK; |
2132 |
i = (vaddr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
|
2133 |
for (mmu_idx = 0; mmu_idx < NB_MMU_MODES; mmu_idx++) |
2134 |
tlb_set_dirty1(&env->tlb_table[mmu_idx][i], vaddr); |
2135 |
} |
2136 |
|
2137 |
/* Our TLB does not support large pages, so remember the area covered by
|
2138 |
large pages and trigger a full TLB flush if these are invalidated. */
|
2139 |
static void tlb_add_large_page(CPUState *env, target_ulong vaddr, |
2140 |
target_ulong size) |
2141 |
{ |
2142 |
target_ulong mask = ~(size - 1);
|
2143 |
|
2144 |
if (env->tlb_flush_addr == (target_ulong)-1) { |
2145 |
env->tlb_flush_addr = vaddr & mask; |
2146 |
env->tlb_flush_mask = mask; |
2147 |
return;
|
2148 |
} |
2149 |
/* Extend the existing region to include the new page.
|
2150 |
This is a compromise between unnecessary flushes and the cost
|
2151 |
of maintaining a full variable size TLB. */
|
2152 |
mask &= env->tlb_flush_mask; |
2153 |
while (((env->tlb_flush_addr ^ vaddr) & mask) != 0) { |
2154 |
mask <<= 1;
|
2155 |
} |
2156 |
env->tlb_flush_addr &= mask; |
2157 |
env->tlb_flush_mask = mask; |
2158 |
} |
2159 |
|
2160 |
static bool is_ram_rom(MemoryRegionSection *s) |
2161 |
{ |
2162 |
return memory_region_is_ram(s->mr);
|
2163 |
} |
2164 |
|
2165 |
static bool is_romd(MemoryRegionSection *s) |
2166 |
{ |
2167 |
MemoryRegion *mr = s->mr; |
2168 |
|
2169 |
return mr->rom_device && mr->readable;
|
2170 |
} |
2171 |
|
2172 |
static bool is_ram_rom_romd(MemoryRegionSection *s) |
2173 |
{ |
2174 |
return is_ram_rom(s) || is_romd(s);
|
2175 |
} |
2176 |
|
2177 |
/* Add a new TLB entry. At most one entry for a given virtual address
|
2178 |
is permitted. Only a single TARGET_PAGE_SIZE region is mapped, the
|
2179 |
supplied size is only used by tlb_flush_page. */
|
2180 |
void tlb_set_page(CPUState *env, target_ulong vaddr,
|
2181 |
target_phys_addr_t paddr, int prot,
|
2182 |
int mmu_idx, target_ulong size)
|
2183 |
{ |
2184 |
MemoryRegionSection *section; |
2185 |
unsigned int index; |
2186 |
target_ulong address; |
2187 |
target_ulong code_address; |
2188 |
unsigned long addend; |
2189 |
CPUTLBEntry *te; |
2190 |
CPUWatchpoint *wp; |
2191 |
target_phys_addr_t iotlb; |
2192 |
|
2193 |
assert(size >= TARGET_PAGE_SIZE); |
2194 |
if (size != TARGET_PAGE_SIZE) {
|
2195 |
tlb_add_large_page(env, vaddr, size); |
2196 |
} |
2197 |
section = phys_page_find(paddr >> TARGET_PAGE_BITS); |
2198 |
#if defined(DEBUG_TLB)
|
2199 |
printf("tlb_set_page: vaddr=" TARGET_FMT_lx " paddr=0x" TARGET_FMT_plx |
2200 |
" prot=%x idx=%d pd=0x%08lx\n",
|
2201 |
vaddr, paddr, prot, mmu_idx, pd); |
2202 |
#endif
|
2203 |
|
2204 |
address = vaddr; |
2205 |
if (!is_ram_rom_romd(section)) {
|
2206 |
/* IO memory case (romd handled later) */
|
2207 |
address |= TLB_MMIO; |
2208 |
} |
2209 |
if (is_ram_rom_romd(section)) {
|
2210 |
addend = (unsigned long)memory_region_get_ram_ptr(section->mr) |
2211 |
+ section_addr(section, paddr); |
2212 |
} else {
|
2213 |
addend = 0;
|
2214 |
} |
2215 |
if (is_ram_rom(section)) {
|
2216 |
/* Normal RAM. */
|
2217 |
iotlb = (memory_region_get_ram_addr(section->mr) & TARGET_PAGE_MASK) |
2218 |
+ section_addr(section, paddr); |
2219 |
if (!section->readonly)
|
2220 |
iotlb |= phys_section_notdirty; |
2221 |
else
|
2222 |
iotlb |= phys_section_rom; |
2223 |
} else {
|
2224 |
/* IO handlers are currently passed a physical address.
|
2225 |
It would be nice to pass an offset from the base address
|
2226 |
of that region. This would avoid having to special case RAM,
|
2227 |
and avoid full address decoding in every device.
|
2228 |
We can't use the high bits of pd for this because
|
2229 |
IO_MEM_ROMD uses these as a ram address. */
|
2230 |
iotlb = section - phys_sections; |
2231 |
iotlb += section_addr(section, paddr); |
2232 |
} |
2233 |
|
2234 |
code_address = address; |
2235 |
/* Make accesses to pages with watchpoints go via the
|
2236 |
watchpoint trap routines. */
|
2237 |
QTAILQ_FOREACH(wp, &env->watchpoints, entry) { |
2238 |
if (vaddr == (wp->vaddr & TARGET_PAGE_MASK)) {
|
2239 |
/* Avoid trapping reads of pages with a write breakpoint. */
|
2240 |
if ((prot & PAGE_WRITE) || (wp->flags & BP_MEM_READ)) {
|
2241 |
iotlb = phys_section_watch + paddr; |
2242 |
address |= TLB_MMIO; |
2243 |
break;
|
2244 |
} |
2245 |
} |
2246 |
} |
2247 |
|
2248 |
index = (vaddr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
|
2249 |
env->iotlb[mmu_idx][index] = iotlb - vaddr; |
2250 |
te = &env->tlb_table[mmu_idx][index]; |
2251 |
te->addend = addend - vaddr; |
2252 |
if (prot & PAGE_READ) {
|
2253 |
te->addr_read = address; |
2254 |
} else {
|
2255 |
te->addr_read = -1;
|
2256 |
} |
2257 |
|
2258 |
if (prot & PAGE_EXEC) {
|
2259 |
te->addr_code = code_address; |
2260 |
} else {
|
2261 |
te->addr_code = -1;
|
2262 |
} |
2263 |
if (prot & PAGE_WRITE) {
|
2264 |
if ((memory_region_is_ram(section->mr) && section->readonly)
|
2265 |
|| is_romd(section)) { |
2266 |
/* Write access calls the I/O callback. */
|
2267 |
te->addr_write = address | TLB_MMIO; |
2268 |
} else if (memory_region_is_ram(section->mr) |
2269 |
&& !cpu_physical_memory_is_dirty( |
2270 |
section->mr->ram_addr |
2271 |
+ section_addr(section, paddr))) { |
2272 |
te->addr_write = address | TLB_NOTDIRTY; |
2273 |
} else {
|
2274 |
te->addr_write = address; |
2275 |
} |
2276 |
} else {
|
2277 |
te->addr_write = -1;
|
2278 |
} |
2279 |
} |
2280 |
|
2281 |
#else
|
2282 |
|
2283 |
void tlb_flush(CPUState *env, int flush_global) |
2284 |
{ |
2285 |
} |
2286 |
|
2287 |
void tlb_flush_page(CPUState *env, target_ulong addr)
|
2288 |
{ |
2289 |
} |
2290 |
|
2291 |
/*
|
2292 |
* Walks guest process memory "regions" one by one
|
2293 |
* and calls callback function 'fn' for each region.
|
2294 |
*/
|
2295 |
|
2296 |
struct walk_memory_regions_data
|
2297 |
{ |
2298 |
walk_memory_regions_fn fn; |
2299 |
void *priv;
|
2300 |
unsigned long start; |
2301 |
int prot;
|
2302 |
}; |
2303 |
|
2304 |
static int walk_memory_regions_end(struct walk_memory_regions_data *data, |
2305 |
abi_ulong end, int new_prot)
|
2306 |
{ |
2307 |
if (data->start != -1ul) { |
2308 |
int rc = data->fn(data->priv, data->start, end, data->prot);
|
2309 |
if (rc != 0) { |
2310 |
return rc;
|
2311 |
} |
2312 |
} |
2313 |
|
2314 |
data->start = (new_prot ? end : -1ul);
|
2315 |
data->prot = new_prot; |
2316 |
|
2317 |
return 0; |
2318 |
} |
2319 |
|
2320 |
static int walk_memory_regions_1(struct walk_memory_regions_data *data, |
2321 |
abi_ulong base, int level, void **lp) |
2322 |
{ |
2323 |
abi_ulong pa; |
2324 |
int i, rc;
|
2325 |
|
2326 |
if (*lp == NULL) { |
2327 |
return walk_memory_regions_end(data, base, 0); |
2328 |
} |
2329 |
|
2330 |
if (level == 0) { |
2331 |
PageDesc *pd = *lp; |
2332 |
for (i = 0; i < L2_SIZE; ++i) { |
2333 |
int prot = pd[i].flags;
|
2334 |
|
2335 |
pa = base | (i << TARGET_PAGE_BITS); |
2336 |
if (prot != data->prot) {
|
2337 |
rc = walk_memory_regions_end(data, pa, prot); |
2338 |
if (rc != 0) { |
2339 |
return rc;
|
2340 |
} |
2341 |
} |
2342 |
} |
2343 |
} else {
|
2344 |
void **pp = *lp;
|
2345 |
for (i = 0; i < L2_SIZE; ++i) { |
2346 |
pa = base | ((abi_ulong)i << |
2347 |
(TARGET_PAGE_BITS + L2_BITS * level)); |
2348 |
rc = walk_memory_regions_1(data, pa, level - 1, pp + i);
|
2349 |
if (rc != 0) { |
2350 |
return rc;
|
2351 |
} |
2352 |
} |
2353 |
} |
2354 |
|
2355 |
return 0; |
2356 |
} |
2357 |
|
2358 |
int walk_memory_regions(void *priv, walk_memory_regions_fn fn) |
2359 |
{ |
2360 |
struct walk_memory_regions_data data;
|
2361 |
unsigned long i; |
2362 |
|
2363 |
data.fn = fn; |
2364 |
data.priv = priv; |
2365 |
data.start = -1ul;
|
2366 |
data.prot = 0;
|
2367 |
|
2368 |
for (i = 0; i < V_L1_SIZE; i++) { |
2369 |
int rc = walk_memory_regions_1(&data, (abi_ulong)i << V_L1_SHIFT,
|
2370 |
V_L1_SHIFT / L2_BITS - 1, l1_map + i);
|
2371 |
if (rc != 0) { |
2372 |
return rc;
|
2373 |
} |
2374 |
} |
2375 |
|
2376 |
return walk_memory_regions_end(&data, 0, 0); |
2377 |
} |
2378 |
|
2379 |
static int dump_region(void *priv, abi_ulong start, |
2380 |
abi_ulong end, unsigned long prot) |
2381 |
{ |
2382 |
FILE *f = (FILE *)priv; |
2383 |
|
2384 |
(void) fprintf(f, TARGET_ABI_FMT_lx"-"TARGET_ABI_FMT_lx |
2385 |
" "TARGET_ABI_FMT_lx" %c%c%c\n", |
2386 |
start, end, end - start, |
2387 |
((prot & PAGE_READ) ? 'r' : '-'), |
2388 |
((prot & PAGE_WRITE) ? 'w' : '-'), |
2389 |
((prot & PAGE_EXEC) ? 'x' : '-')); |
2390 |
|
2391 |
return (0); |
2392 |
} |
2393 |
|
2394 |
/* dump memory mappings */
|
2395 |
void page_dump(FILE *f)
|
2396 |
{ |
2397 |
(void) fprintf(f, "%-8s %-8s %-8s %s\n", |
2398 |
"start", "end", "size", "prot"); |
2399 |
walk_memory_regions(f, dump_region); |
2400 |
} |
2401 |
|
2402 |
int page_get_flags(target_ulong address)
|
2403 |
{ |
2404 |
PageDesc *p; |
2405 |
|
2406 |
p = page_find(address >> TARGET_PAGE_BITS); |
2407 |
if (!p)
|
2408 |
return 0; |
2409 |
return p->flags;
|
2410 |
} |
2411 |
|
2412 |
/* Modify the flags of a page and invalidate the code if necessary.
|
2413 |
The flag PAGE_WRITE_ORG is positioned automatically depending
|
2414 |
on PAGE_WRITE. The mmap_lock should already be held. */
|
2415 |
void page_set_flags(target_ulong start, target_ulong end, int flags) |
2416 |
{ |
2417 |
target_ulong addr, len; |
2418 |
|
2419 |
/* This function should never be called with addresses outside the
|
2420 |
guest address space. If this assert fires, it probably indicates
|
2421 |
a missing call to h2g_valid. */
|
2422 |
#if TARGET_ABI_BITS > L1_MAP_ADDR_SPACE_BITS
|
2423 |
assert(end < ((abi_ulong)1 << L1_MAP_ADDR_SPACE_BITS));
|
2424 |
#endif
|
2425 |
assert(start < end); |
2426 |
|
2427 |
start = start & TARGET_PAGE_MASK; |
2428 |
end = TARGET_PAGE_ALIGN(end); |
2429 |
|
2430 |
if (flags & PAGE_WRITE) {
|
2431 |
flags |= PAGE_WRITE_ORG; |
2432 |
} |
2433 |
|
2434 |
for (addr = start, len = end - start;
|
2435 |
len != 0;
|
2436 |
len -= TARGET_PAGE_SIZE, addr += TARGET_PAGE_SIZE) { |
2437 |
PageDesc *p = page_find_alloc(addr >> TARGET_PAGE_BITS, 1);
|
2438 |
|
2439 |
/* If the write protection bit is set, then we invalidate
|
2440 |
the code inside. */
|
2441 |
if (!(p->flags & PAGE_WRITE) &&
|
2442 |
(flags & PAGE_WRITE) && |
2443 |
p->first_tb) { |
2444 |
tb_invalidate_phys_page(addr, 0, NULL); |
2445 |
} |
2446 |
p->flags = flags; |
2447 |
} |
2448 |
} |
2449 |
|
2450 |
int page_check_range(target_ulong start, target_ulong len, int flags) |
2451 |
{ |
2452 |
PageDesc *p; |
2453 |
target_ulong end; |
2454 |
target_ulong addr; |
2455 |
|
2456 |
/* This function should never be called with addresses outside the
|
2457 |
guest address space. If this assert fires, it probably indicates
|
2458 |
a missing call to h2g_valid. */
|
2459 |
#if TARGET_ABI_BITS > L1_MAP_ADDR_SPACE_BITS
|
2460 |
assert(start < ((abi_ulong)1 << L1_MAP_ADDR_SPACE_BITS));
|
2461 |
#endif
|
2462 |
|
2463 |
if (len == 0) { |
2464 |
return 0; |
2465 |
} |
2466 |
if (start + len - 1 < start) { |
2467 |
/* We've wrapped around. */
|
2468 |
return -1; |
2469 |
} |
2470 |
|
2471 |
end = TARGET_PAGE_ALIGN(start+len); /* must do before we loose bits in the next step */
|
2472 |
start = start & TARGET_PAGE_MASK; |
2473 |
|
2474 |
for (addr = start, len = end - start;
|
2475 |
len != 0;
|
2476 |
len -= TARGET_PAGE_SIZE, addr += TARGET_PAGE_SIZE) { |
2477 |
p = page_find(addr >> TARGET_PAGE_BITS); |
2478 |
if( !p )
|
2479 |
return -1; |
2480 |
if( !(p->flags & PAGE_VALID) )
|
2481 |
return -1; |
2482 |
|
2483 |
if ((flags & PAGE_READ) && !(p->flags & PAGE_READ))
|
2484 |
return -1; |
2485 |
if (flags & PAGE_WRITE) {
|
2486 |
if (!(p->flags & PAGE_WRITE_ORG))
|
2487 |
return -1; |
2488 |
/* unprotect the page if it was put read-only because it
|
2489 |
contains translated code */
|
2490 |
if (!(p->flags & PAGE_WRITE)) {
|
2491 |
if (!page_unprotect(addr, 0, NULL)) |
2492 |
return -1; |
2493 |
} |
2494 |
return 0; |
2495 |
} |
2496 |
} |
2497 |
return 0; |
2498 |
} |
2499 |
|
2500 |
/* called from signal handler: invalidate the code and unprotect the
|
2501 |
page. Return TRUE if the fault was successfully handled. */
|
2502 |
int page_unprotect(target_ulong address, unsigned long pc, void *puc) |
2503 |
{ |
2504 |
unsigned int prot; |
2505 |
PageDesc *p; |
2506 |
target_ulong host_start, host_end, addr; |
2507 |
|
2508 |
/* Technically this isn't safe inside a signal handler. However we
|
2509 |
know this only ever happens in a synchronous SEGV handler, so in
|
2510 |
practice it seems to be ok. */
|
2511 |
mmap_lock(); |
2512 |
|
2513 |
p = page_find(address >> TARGET_PAGE_BITS); |
2514 |
if (!p) {
|
2515 |
mmap_unlock(); |
2516 |
return 0; |
2517 |
} |
2518 |
|
2519 |
/* if the page was really writable, then we change its
|
2520 |
protection back to writable */
|
2521 |
if ((p->flags & PAGE_WRITE_ORG) && !(p->flags & PAGE_WRITE)) {
|
2522 |
host_start = address & qemu_host_page_mask; |
2523 |
host_end = host_start + qemu_host_page_size; |
2524 |
|
2525 |
prot = 0;
|
2526 |
for (addr = host_start ; addr < host_end ; addr += TARGET_PAGE_SIZE) {
|
2527 |
p = page_find(addr >> TARGET_PAGE_BITS); |
2528 |
p->flags |= PAGE_WRITE; |
2529 |
prot |= p->flags; |
2530 |
|
2531 |
/* and since the content will be modified, we must invalidate
|
2532 |
the corresponding translated code. */
|
2533 |
tb_invalidate_phys_page(addr, pc, puc); |
2534 |
#ifdef DEBUG_TB_CHECK
|
2535 |
tb_invalidate_check(addr); |
2536 |
#endif
|
2537 |
} |
2538 |
mprotect((void *)g2h(host_start), qemu_host_page_size,
|
2539 |
prot & PAGE_BITS); |
2540 |
|
2541 |
mmap_unlock(); |
2542 |
return 1; |
2543 |
} |
2544 |
mmap_unlock(); |
2545 |
return 0; |
2546 |
} |
2547 |
|
2548 |
static inline void tlb_set_dirty(CPUState *env, |
2549 |
unsigned long addr, target_ulong vaddr) |
2550 |
{ |
2551 |
} |
2552 |
#endif /* defined(CONFIG_USER_ONLY) */ |
2553 |
|
2554 |
#if !defined(CONFIG_USER_ONLY)
|
2555 |
|
2556 |
#define SUBPAGE_IDX(addr) ((addr) & ~TARGET_PAGE_MASK)
|
2557 |
typedef struct subpage_t { |
2558 |
MemoryRegion iomem; |
2559 |
target_phys_addr_t base; |
2560 |
uint16_t sub_section[TARGET_PAGE_SIZE]; |
2561 |
} subpage_t; |
2562 |
|
2563 |
static int subpage_register (subpage_t *mmio, uint32_t start, uint32_t end, |
2564 |
uint16_t section); |
2565 |
static subpage_t *subpage_init(target_phys_addr_t base);
|
2566 |
static void destroy_page_desc(uint16_t section_index) |
2567 |
{ |
2568 |
MemoryRegionSection *section = &phys_sections[section_index]; |
2569 |
MemoryRegion *mr = section->mr; |
2570 |
|
2571 |
if (mr->subpage) {
|
2572 |
subpage_t *subpage = container_of(mr, subpage_t, iomem); |
2573 |
memory_region_destroy(&subpage->iomem); |
2574 |
g_free(subpage); |
2575 |
} |
2576 |
} |
2577 |
|
2578 |
static void destroy_l2_mapping(PhysPageEntry *lp, unsigned level) |
2579 |
{ |
2580 |
unsigned i;
|
2581 |
PhysPageEntry *p; |
2582 |
|
2583 |
if (lp->ptr == PHYS_MAP_NODE_NIL) {
|
2584 |
return;
|
2585 |
} |
2586 |
|
2587 |
p = phys_map_nodes[lp->ptr]; |
2588 |
for (i = 0; i < L2_SIZE; ++i) { |
2589 |
if (!p[i].is_leaf) {
|
2590 |
destroy_l2_mapping(&p[i], level - 1);
|
2591 |
} else {
|
2592 |
destroy_page_desc(p[i].ptr); |
2593 |
} |
2594 |
} |
2595 |
lp->is_leaf = 0;
|
2596 |
lp->ptr = PHYS_MAP_NODE_NIL; |
2597 |
} |
2598 |
|
2599 |
static void destroy_all_mappings(void) |
2600 |
{ |
2601 |
destroy_l2_mapping(&phys_map, P_L2_LEVELS - 1);
|
2602 |
phys_map_nodes_reset(); |
2603 |
} |
2604 |
|
2605 |
static uint16_t phys_section_add(MemoryRegionSection *section)
|
2606 |
{ |
2607 |
if (phys_sections_nb == phys_sections_nb_alloc) {
|
2608 |
phys_sections_nb_alloc = MAX(phys_sections_nb_alloc * 2, 16); |
2609 |
phys_sections = g_renew(MemoryRegionSection, phys_sections, |
2610 |
phys_sections_nb_alloc); |
2611 |
} |
2612 |
phys_sections[phys_sections_nb] = *section; |
2613 |
return phys_sections_nb++;
|
2614 |
} |
2615 |
|
2616 |
static void phys_sections_clear(void) |
2617 |
{ |
2618 |
phys_sections_nb = 0;
|
2619 |
} |
2620 |
|
2621 |
/* register physical memory.
|
2622 |
For RAM, 'size' must be a multiple of the target page size.
|
2623 |
If (phys_offset & ~TARGET_PAGE_MASK) != 0, then it is an
|
2624 |
io memory page. The address used when calling the IO function is
|
2625 |
the offset from the start of the region, plus region_offset. Both
|
2626 |
start_addr and region_offset are rounded down to a page boundary
|
2627 |
before calculating this offset. This should not be a problem unless
|
2628 |
the low bits of start_addr and region_offset differ. */
|
2629 |
static void register_subpage(MemoryRegionSection *section) |
2630 |
{ |
2631 |
subpage_t *subpage; |
2632 |
target_phys_addr_t base = section->offset_within_address_space |
2633 |
& TARGET_PAGE_MASK; |
2634 |
MemoryRegionSection *existing = phys_page_find(base >> TARGET_PAGE_BITS); |
2635 |
MemoryRegionSection subsection = { |
2636 |
.offset_within_address_space = base, |
2637 |
.size = TARGET_PAGE_SIZE, |
2638 |
}; |
2639 |
target_phys_addr_t start, end; |
2640 |
|
2641 |
assert(existing->mr->subpage || existing->mr == &io_mem_unassigned); |
2642 |
|
2643 |
if (!(existing->mr->subpage)) {
|
2644 |
subpage = subpage_init(base); |
2645 |
subsection.mr = &subpage->iomem; |
2646 |
phys_page_set(base >> TARGET_PAGE_BITS, 1,
|
2647 |
phys_section_add(&subsection)); |
2648 |
} else {
|
2649 |
subpage = container_of(existing->mr, subpage_t, iomem); |
2650 |
} |
2651 |
start = section->offset_within_address_space & ~TARGET_PAGE_MASK; |
2652 |
end = start + section->size; |
2653 |
subpage_register(subpage, start, end, phys_section_add(section)); |
2654 |
} |
2655 |
|
2656 |
|
2657 |
static void register_multipage(MemoryRegionSection *section) |
2658 |
{ |
2659 |
target_phys_addr_t start_addr = section->offset_within_address_space; |
2660 |
ram_addr_t size = section->size; |
2661 |
target_phys_addr_t addr; |
2662 |
uint16_t section_index = phys_section_add(section); |
2663 |
|
2664 |
assert(size); |
2665 |
|
2666 |
addr = start_addr; |
2667 |
phys_page_set(addr >> TARGET_PAGE_BITS, size >> TARGET_PAGE_BITS, |
2668 |
section_index); |
2669 |
} |
2670 |
|
2671 |
void cpu_register_physical_memory_log(MemoryRegionSection *section,
|
2672 |
bool readonly)
|
2673 |
{ |
2674 |
MemoryRegionSection now = *section, remain = *section; |
2675 |
|
2676 |
if ((now.offset_within_address_space & ~TARGET_PAGE_MASK)
|
2677 |
|| (now.size < TARGET_PAGE_SIZE)) { |
2678 |
now.size = MIN(TARGET_PAGE_ALIGN(now.offset_within_address_space) |
2679 |
- now.offset_within_address_space, |
2680 |
now.size); |
2681 |
register_subpage(&now); |
2682 |
remain.size -= now.size; |
2683 |
remain.offset_within_address_space += now.size; |
2684 |
remain.offset_within_region += now.size; |
2685 |
} |
2686 |
now = remain; |
2687 |
now.size &= TARGET_PAGE_MASK; |
2688 |
if (now.size) {
|
2689 |
register_multipage(&now); |
2690 |
remain.size -= now.size; |
2691 |
remain.offset_within_address_space += now.size; |
2692 |
remain.offset_within_region += now.size; |
2693 |
} |
2694 |
now = remain; |
2695 |
if (now.size) {
|
2696 |
register_subpage(&now); |
2697 |
} |
2698 |
} |
2699 |
|
2700 |
|
2701 |
void qemu_register_coalesced_mmio(target_phys_addr_t addr, ram_addr_t size)
|
2702 |
{ |
2703 |
if (kvm_enabled())
|
2704 |
kvm_coalesce_mmio_region(addr, size); |
2705 |
} |
2706 |
|
2707 |
void qemu_unregister_coalesced_mmio(target_phys_addr_t addr, ram_addr_t size)
|
2708 |
{ |
2709 |
if (kvm_enabled())
|
2710 |
kvm_uncoalesce_mmio_region(addr, size); |
2711 |
} |
2712 |
|
2713 |
void qemu_flush_coalesced_mmio_buffer(void) |
2714 |
{ |
2715 |
if (kvm_enabled())
|
2716 |
kvm_flush_coalesced_mmio_buffer(); |
2717 |
} |
2718 |
|
2719 |
#if defined(__linux__) && !defined(TARGET_S390X)
|
2720 |
|
2721 |
#include <sys/vfs.h> |
2722 |
|
2723 |
#define HUGETLBFS_MAGIC 0x958458f6 |
2724 |
|
2725 |
static long gethugepagesize(const char *path) |
2726 |
{ |
2727 |
struct statfs fs;
|
2728 |
int ret;
|
2729 |
|
2730 |
do {
|
2731 |
ret = statfs(path, &fs); |
2732 |
} while (ret != 0 && errno == EINTR); |
2733 |
|
2734 |
if (ret != 0) { |
2735 |
perror(path); |
2736 |
return 0; |
2737 |
} |
2738 |
|
2739 |
if (fs.f_type != HUGETLBFS_MAGIC)
|
2740 |
fprintf(stderr, "Warning: path not on HugeTLBFS: %s\n", path);
|
2741 |
|
2742 |
return fs.f_bsize;
|
2743 |
} |
2744 |
|
2745 |
static void *file_ram_alloc(RAMBlock *block, |
2746 |
ram_addr_t memory, |
2747 |
const char *path) |
2748 |
{ |
2749 |
char *filename;
|
2750 |
void *area;
|
2751 |
int fd;
|
2752 |
#ifdef MAP_POPULATE
|
2753 |
int flags;
|
2754 |
#endif
|
2755 |
unsigned long hpagesize; |
2756 |
|
2757 |
hpagesize = gethugepagesize(path); |
2758 |
if (!hpagesize) {
|
2759 |
return NULL; |
2760 |
} |
2761 |
|
2762 |
if (memory < hpagesize) {
|
2763 |
return NULL; |
2764 |
} |
2765 |
|
2766 |
if (kvm_enabled() && !kvm_has_sync_mmu()) {
|
2767 |
fprintf(stderr, "host lacks kvm mmu notifiers, -mem-path unsupported\n");
|
2768 |
return NULL; |
2769 |
} |
2770 |
|
2771 |
if (asprintf(&filename, "%s/qemu_back_mem.XXXXXX", path) == -1) { |
2772 |
return NULL; |
2773 |
} |
2774 |
|
2775 |
fd = mkstemp(filename); |
2776 |
if (fd < 0) { |
2777 |
perror("unable to create backing store for hugepages");
|
2778 |
free(filename); |
2779 |
return NULL; |
2780 |
} |
2781 |
unlink(filename); |
2782 |
free(filename); |
2783 |
|
2784 |
memory = (memory+hpagesize-1) & ~(hpagesize-1); |
2785 |
|
2786 |
/*
|
2787 |
* ftruncate is not supported by hugetlbfs in older
|
2788 |
* hosts, so don't bother bailing out on errors.
|
2789 |
* If anything goes wrong with it under other filesystems,
|
2790 |
* mmap will fail.
|
2791 |
*/
|
2792 |
if (ftruncate(fd, memory))
|
2793 |
perror("ftruncate");
|
2794 |
|
2795 |
#ifdef MAP_POPULATE
|
2796 |
/* NB: MAP_POPULATE won't exhaustively alloc all phys pages in the case
|
2797 |
* MAP_PRIVATE is requested. For mem_prealloc we mmap as MAP_SHARED
|
2798 |
* to sidestep this quirk.
|
2799 |
*/
|
2800 |
flags = mem_prealloc ? MAP_POPULATE | MAP_SHARED : MAP_PRIVATE; |
2801 |
area = mmap(0, memory, PROT_READ | PROT_WRITE, flags, fd, 0); |
2802 |
#else
|
2803 |
area = mmap(0, memory, PROT_READ | PROT_WRITE, MAP_PRIVATE, fd, 0); |
2804 |
#endif
|
2805 |
if (area == MAP_FAILED) {
|
2806 |
perror("file_ram_alloc: can't mmap RAM pages");
|
2807 |
close(fd); |
2808 |
return (NULL); |
2809 |
} |
2810 |
block->fd = fd; |
2811 |
return area;
|
2812 |
} |
2813 |
#endif
|
2814 |
|
2815 |
static ram_addr_t find_ram_offset(ram_addr_t size)
|
2816 |
{ |
2817 |
RAMBlock *block, *next_block; |
2818 |
ram_addr_t offset = RAM_ADDR_MAX, mingap = RAM_ADDR_MAX; |
2819 |
|
2820 |
if (QLIST_EMPTY(&ram_list.blocks))
|
2821 |
return 0; |
2822 |
|
2823 |
QLIST_FOREACH(block, &ram_list.blocks, next) { |
2824 |
ram_addr_t end, next = RAM_ADDR_MAX; |
2825 |
|
2826 |
end = block->offset + block->length; |
2827 |
|
2828 |
QLIST_FOREACH(next_block, &ram_list.blocks, next) { |
2829 |
if (next_block->offset >= end) {
|
2830 |
next = MIN(next, next_block->offset); |
2831 |
} |
2832 |
} |
2833 |
if (next - end >= size && next - end < mingap) {
|
2834 |
offset = end; |
2835 |
mingap = next - end; |
2836 |
} |
2837 |
} |
2838 |
|
2839 |
if (offset == RAM_ADDR_MAX) {
|
2840 |
fprintf(stderr, "Failed to find gap of requested size: %" PRIu64 "\n", |
2841 |
(uint64_t)size); |
2842 |
abort(); |
2843 |
} |
2844 |
|
2845 |
return offset;
|
2846 |
} |
2847 |
|
2848 |
static ram_addr_t last_ram_offset(void) |
2849 |
{ |
2850 |
RAMBlock *block; |
2851 |
ram_addr_t last = 0;
|
2852 |
|
2853 |
QLIST_FOREACH(block, &ram_list.blocks, next) |
2854 |
last = MAX(last, block->offset + block->length); |
2855 |
|
2856 |
return last;
|
2857 |
} |
2858 |
|
2859 |
void qemu_ram_set_idstr(ram_addr_t addr, const char *name, DeviceState *dev) |
2860 |
{ |
2861 |
RAMBlock *new_block, *block; |
2862 |
|
2863 |
new_block = NULL;
|
2864 |
QLIST_FOREACH(block, &ram_list.blocks, next) { |
2865 |
if (block->offset == addr) {
|
2866 |
new_block = block; |
2867 |
break;
|
2868 |
} |
2869 |
} |
2870 |
assert(new_block); |
2871 |
assert(!new_block->idstr[0]);
|
2872 |
|
2873 |
if (dev && dev->parent_bus && dev->parent_bus->info->get_dev_path) {
|
2874 |
char *id = dev->parent_bus->info->get_dev_path(dev);
|
2875 |
if (id) {
|
2876 |
snprintf(new_block->idstr, sizeof(new_block->idstr), "%s/", id); |
2877 |
g_free(id); |
2878 |
} |
2879 |
} |
2880 |
pstrcat(new_block->idstr, sizeof(new_block->idstr), name);
|
2881 |
|
2882 |
QLIST_FOREACH(block, &ram_list.blocks, next) { |
2883 |
if (block != new_block && !strcmp(block->idstr, new_block->idstr)) {
|
2884 |
fprintf(stderr, "RAMBlock \"%s\" already registered, abort!\n",
|
2885 |
new_block->idstr); |
2886 |
abort(); |
2887 |
} |
2888 |
} |
2889 |
} |
2890 |
|
2891 |
ram_addr_t qemu_ram_alloc_from_ptr(ram_addr_t size, void *host,
|
2892 |
MemoryRegion *mr) |
2893 |
{ |
2894 |
RAMBlock *new_block; |
2895 |
|
2896 |
size = TARGET_PAGE_ALIGN(size); |
2897 |
new_block = g_malloc0(sizeof(*new_block));
|
2898 |
|
2899 |
new_block->mr = mr; |
2900 |
new_block->offset = find_ram_offset(size); |
2901 |
if (host) {
|
2902 |
new_block->host = host; |
2903 |
new_block->flags |= RAM_PREALLOC_MASK; |
2904 |
} else {
|
2905 |
if (mem_path) {
|
2906 |
#if defined (__linux__) && !defined(TARGET_S390X)
|
2907 |
new_block->host = file_ram_alloc(new_block, size, mem_path); |
2908 |
if (!new_block->host) {
|
2909 |
new_block->host = qemu_vmalloc(size); |
2910 |
qemu_madvise(new_block->host, size, QEMU_MADV_MERGEABLE); |
2911 |
} |
2912 |
#else
|
2913 |
fprintf(stderr, "-mem-path option unsupported\n");
|
2914 |
exit(1);
|
2915 |
#endif
|
2916 |
} else {
|
2917 |
#if defined(TARGET_S390X) && defined(CONFIG_KVM)
|
2918 |
/* S390 KVM requires the topmost vma of the RAM to be smaller than
|
2919 |
an system defined value, which is at least 256GB. Larger systems
|
2920 |
have larger values. We put the guest between the end of data
|
2921 |
segment (system break) and this value. We use 32GB as a base to
|
2922 |
have enough room for the system break to grow. */
|
2923 |
new_block->host = mmap((void*)0x800000000, size, |
2924 |
PROT_EXEC|PROT_READ|PROT_WRITE, |
2925 |
MAP_SHARED | MAP_ANONYMOUS | MAP_FIXED, -1, 0); |
2926 |
if (new_block->host == MAP_FAILED) {
|
2927 |
fprintf(stderr, "Allocating RAM failed\n");
|
2928 |
abort(); |
2929 |
} |
2930 |
#else
|
2931 |
if (xen_enabled()) {
|
2932 |
xen_ram_alloc(new_block->offset, size, mr); |
2933 |
} else {
|
2934 |
new_block->host = qemu_vmalloc(size); |
2935 |
} |
2936 |
#endif
|
2937 |
qemu_madvise(new_block->host, size, QEMU_MADV_MERGEABLE); |
2938 |
} |
2939 |
} |
2940 |
new_block->length = size; |
2941 |
|
2942 |
QLIST_INSERT_HEAD(&ram_list.blocks, new_block, next); |
2943 |
|
2944 |
ram_list.phys_dirty = g_realloc(ram_list.phys_dirty, |
2945 |
last_ram_offset() >> TARGET_PAGE_BITS); |
2946 |
memset(ram_list.phys_dirty + (new_block->offset >> TARGET_PAGE_BITS), |
2947 |
0xff, size >> TARGET_PAGE_BITS);
|
2948 |
|
2949 |
if (kvm_enabled())
|
2950 |
kvm_setup_guest_memory(new_block->host, size); |
2951 |
|
2952 |
return new_block->offset;
|
2953 |
} |
2954 |
|
2955 |
ram_addr_t qemu_ram_alloc(ram_addr_t size, MemoryRegion *mr) |
2956 |
{ |
2957 |
return qemu_ram_alloc_from_ptr(size, NULL, mr); |
2958 |
} |
2959 |
|
2960 |
void qemu_ram_free_from_ptr(ram_addr_t addr)
|
2961 |
{ |
2962 |
RAMBlock *block; |
2963 |
|
2964 |
QLIST_FOREACH(block, &ram_list.blocks, next) { |
2965 |
if (addr == block->offset) {
|
2966 |
QLIST_REMOVE(block, next); |
2967 |
g_free(block); |
2968 |
return;
|
2969 |
} |
2970 |
} |
2971 |
} |
2972 |
|
2973 |
void qemu_ram_free(ram_addr_t addr)
|
2974 |
{ |
2975 |
RAMBlock *block; |
2976 |
|
2977 |
QLIST_FOREACH(block, &ram_list.blocks, next) { |
2978 |
if (addr == block->offset) {
|
2979 |
QLIST_REMOVE(block, next); |
2980 |
if (block->flags & RAM_PREALLOC_MASK) {
|
2981 |
; |
2982 |
} else if (mem_path) { |
2983 |
#if defined (__linux__) && !defined(TARGET_S390X)
|
2984 |
if (block->fd) {
|
2985 |
munmap(block->host, block->length); |
2986 |
close(block->fd); |
2987 |
} else {
|
2988 |
qemu_vfree(block->host); |
2989 |
} |
2990 |
#else
|
2991 |
abort(); |
2992 |
#endif
|
2993 |
} else {
|
2994 |
#if defined(TARGET_S390X) && defined(CONFIG_KVM)
|
2995 |
munmap(block->host, block->length); |
2996 |
#else
|
2997 |
if (xen_enabled()) {
|
2998 |
xen_invalidate_map_cache_entry(block->host); |
2999 |
} else {
|
3000 |
qemu_vfree(block->host); |
3001 |
} |
3002 |
#endif
|
3003 |
} |
3004 |
g_free(block); |
3005 |
return;
|
3006 |
} |
3007 |
} |
3008 |
|
3009 |
} |
3010 |
|
3011 |
#ifndef _WIN32
|
3012 |
void qemu_ram_remap(ram_addr_t addr, ram_addr_t length)
|
3013 |
{ |
3014 |
RAMBlock *block; |
3015 |
ram_addr_t offset; |
3016 |
int flags;
|
3017 |
void *area, *vaddr;
|
3018 |
|
3019 |
QLIST_FOREACH(block, &ram_list.blocks, next) { |
3020 |
offset = addr - block->offset; |
3021 |
if (offset < block->length) {
|
3022 |
vaddr = block->host + offset; |
3023 |
if (block->flags & RAM_PREALLOC_MASK) {
|
3024 |
; |
3025 |
} else {
|
3026 |
flags = MAP_FIXED; |
3027 |
munmap(vaddr, length); |
3028 |
if (mem_path) {
|
3029 |
#if defined(__linux__) && !defined(TARGET_S390X)
|
3030 |
if (block->fd) {
|
3031 |
#ifdef MAP_POPULATE
|
3032 |
flags |= mem_prealloc ? MAP_POPULATE | MAP_SHARED : |
3033 |
MAP_PRIVATE; |
3034 |
#else
|
3035 |
flags |= MAP_PRIVATE; |
3036 |
#endif
|
3037 |
area = mmap(vaddr, length, PROT_READ | PROT_WRITE, |
3038 |
flags, block->fd, offset); |
3039 |
} else {
|
3040 |
flags |= MAP_PRIVATE | MAP_ANONYMOUS; |
3041 |
area = mmap(vaddr, length, PROT_READ | PROT_WRITE, |
3042 |
flags, -1, 0); |
3043 |
} |
3044 |
#else
|
3045 |
abort(); |
3046 |
#endif
|
3047 |
} else {
|
3048 |
#if defined(TARGET_S390X) && defined(CONFIG_KVM)
|
3049 |
flags |= MAP_SHARED | MAP_ANONYMOUS; |
3050 |
area = mmap(vaddr, length, PROT_EXEC|PROT_READ|PROT_WRITE, |
3051 |
flags, -1, 0); |
3052 |
#else
|
3053 |
flags |= MAP_PRIVATE | MAP_ANONYMOUS; |
3054 |
area = mmap(vaddr, length, PROT_READ | PROT_WRITE, |
3055 |
flags, -1, 0); |
3056 |
#endif
|
3057 |
} |
3058 |
if (area != vaddr) {
|
3059 |
fprintf(stderr, "Could not remap addr: "
|
3060 |
RAM_ADDR_FMT "@" RAM_ADDR_FMT "\n", |
3061 |
length, addr); |
3062 |
exit(1);
|
3063 |
} |
3064 |
qemu_madvise(vaddr, length, QEMU_MADV_MERGEABLE); |
3065 |
} |
3066 |
return;
|
3067 |
} |
3068 |
} |
3069 |
} |
3070 |
#endif /* !_WIN32 */ |
3071 |
|
3072 |
/* Return a host pointer to ram allocated with qemu_ram_alloc.
|
3073 |
With the exception of the softmmu code in this file, this should
|
3074 |
only be used for local memory (e.g. video ram) that the device owns,
|
3075 |
and knows it isn't going to access beyond the end of the block.
|
3076 |
|
3077 |
It should not be used for general purpose DMA.
|
3078 |
Use cpu_physical_memory_map/cpu_physical_memory_rw instead.
|
3079 |
*/
|
3080 |
void *qemu_get_ram_ptr(ram_addr_t addr)
|
3081 |
{ |
3082 |
RAMBlock *block; |
3083 |
|
3084 |
QLIST_FOREACH(block, &ram_list.blocks, next) { |
3085 |
if (addr - block->offset < block->length) {
|
3086 |
/* Move this entry to to start of the list. */
|
3087 |
if (block != QLIST_FIRST(&ram_list.blocks)) {
|
3088 |
QLIST_REMOVE(block, next); |
3089 |
QLIST_INSERT_HEAD(&ram_list.blocks, block, next); |
3090 |
} |
3091 |
if (xen_enabled()) {
|
3092 |
/* We need to check if the requested address is in the RAM
|
3093 |
* because we don't want to map the entire memory in QEMU.
|
3094 |
* In that case just map until the end of the page.
|
3095 |
*/
|
3096 |
if (block->offset == 0) { |
3097 |
return xen_map_cache(addr, 0, 0); |
3098 |
} else if (block->host == NULL) { |
3099 |
block->host = |
3100 |
xen_map_cache(block->offset, block->length, 1);
|
3101 |
} |
3102 |
} |
3103 |
return block->host + (addr - block->offset);
|
3104 |
} |
3105 |
} |
3106 |
|
3107 |
fprintf(stderr, "Bad ram offset %" PRIx64 "\n", (uint64_t)addr); |
3108 |
abort(); |
3109 |
|
3110 |
return NULL; |
3111 |
} |
3112 |
|
3113 |
/* Return a host pointer to ram allocated with qemu_ram_alloc.
|
3114 |
* Same as qemu_get_ram_ptr but avoid reordering ramblocks.
|
3115 |
*/
|
3116 |
void *qemu_safe_ram_ptr(ram_addr_t addr)
|
3117 |
{ |
3118 |
RAMBlock *block; |
3119 |
|
3120 |
QLIST_FOREACH(block, &ram_list.blocks, next) { |
3121 |
if (addr - block->offset < block->length) {
|
3122 |
if (xen_enabled()) {
|
3123 |
/* We need to check if the requested address is in the RAM
|
3124 |
* because we don't want to map the entire memory in QEMU.
|
3125 |
* In that case just map until the end of the page.
|
3126 |
*/
|
3127 |
if (block->offset == 0) { |
3128 |
return xen_map_cache(addr, 0, 0); |
3129 |
} else if (block->host == NULL) { |
3130 |
block->host = |
3131 |
xen_map_cache(block->offset, block->length, 1);
|
3132 |
} |
3133 |
} |
3134 |
return block->host + (addr - block->offset);
|
3135 |
} |
3136 |
} |
3137 |
|
3138 |
fprintf(stderr, "Bad ram offset %" PRIx64 "\n", (uint64_t)addr); |
3139 |
abort(); |
3140 |
|
3141 |
return NULL; |
3142 |
} |
3143 |
|
3144 |
/* Return a host pointer to guest's ram. Similar to qemu_get_ram_ptr
|
3145 |
* but takes a size argument */
|
3146 |
void *qemu_ram_ptr_length(ram_addr_t addr, ram_addr_t *size)
|
3147 |
{ |
3148 |
if (*size == 0) { |
3149 |
return NULL; |
3150 |
} |
3151 |
if (xen_enabled()) {
|
3152 |
return xen_map_cache(addr, *size, 1); |
3153 |
} else {
|
3154 |
RAMBlock *block; |
3155 |
|
3156 |
QLIST_FOREACH(block, &ram_list.blocks, next) { |
3157 |
if (addr - block->offset < block->length) {
|
3158 |
if (addr - block->offset + *size > block->length)
|
3159 |
*size = block->length - addr + block->offset; |
3160 |
return block->host + (addr - block->offset);
|
3161 |
} |
3162 |
} |
3163 |
|
3164 |
fprintf(stderr, "Bad ram offset %" PRIx64 "\n", (uint64_t)addr); |
3165 |
abort(); |
3166 |
} |
3167 |
} |
3168 |
|
3169 |
void qemu_put_ram_ptr(void *addr) |
3170 |
{ |
3171 |
trace_qemu_put_ram_ptr(addr); |
3172 |
} |
3173 |
|
3174 |
int qemu_ram_addr_from_host(void *ptr, ram_addr_t *ram_addr) |
3175 |
{ |
3176 |
RAMBlock *block; |
3177 |
uint8_t *host = ptr; |
3178 |
|
3179 |
if (xen_enabled()) {
|
3180 |
*ram_addr = xen_ram_addr_from_mapcache(ptr); |
3181 |
return 0; |
3182 |
} |
3183 |
|
3184 |
QLIST_FOREACH(block, &ram_list.blocks, next) { |
3185 |
/* This case append when the block is not mapped. */
|
3186 |
if (block->host == NULL) { |
3187 |
continue;
|
3188 |
} |
3189 |
if (host - block->host < block->length) {
|
3190 |
*ram_addr = block->offset + (host - block->host); |
3191 |
return 0; |
3192 |
} |
3193 |
} |
3194 |
|
3195 |
return -1; |
3196 |
} |
3197 |
|
3198 |
/* Some of the softmmu routines need to translate from a host pointer
|
3199 |
(typically a TLB entry) back to a ram offset. */
|
3200 |
ram_addr_t qemu_ram_addr_from_host_nofail(void *ptr)
|
3201 |
{ |
3202 |
ram_addr_t ram_addr; |
3203 |
|
3204 |
if (qemu_ram_addr_from_host(ptr, &ram_addr)) {
|
3205 |
fprintf(stderr, "Bad ram pointer %p\n", ptr);
|
3206 |
abort(); |
3207 |
} |
3208 |
return ram_addr;
|
3209 |
} |
3210 |
|
3211 |
static uint64_t unassigned_mem_read(void *opaque, target_phys_addr_t addr, |
3212 |
unsigned size)
|
3213 |
{ |
3214 |
#ifdef DEBUG_UNASSIGNED
|
3215 |
printf("Unassigned mem read " TARGET_FMT_plx "\n", addr); |
3216 |
#endif
|
3217 |
#if defined(TARGET_ALPHA) || defined(TARGET_SPARC) || defined(TARGET_MICROBLAZE)
|
3218 |
cpu_unassigned_access(cpu_single_env, addr, 0, 0, 0, size); |
3219 |
#endif
|
3220 |
return 0; |
3221 |
} |
3222 |
|
3223 |
static void unassigned_mem_write(void *opaque, target_phys_addr_t addr, |
3224 |
uint64_t val, unsigned size)
|
3225 |
{ |
3226 |
#ifdef DEBUG_UNASSIGNED
|
3227 |
printf("Unassigned mem write " TARGET_FMT_plx " = 0x%"PRIx64"\n", addr, val); |
3228 |
#endif
|
3229 |
#if defined(TARGET_ALPHA) || defined(TARGET_SPARC) || defined(TARGET_MICROBLAZE)
|
3230 |
cpu_unassigned_access(cpu_single_env, addr, 1, 0, 0, size); |
3231 |
#endif
|
3232 |
} |
3233 |
|
3234 |
static const MemoryRegionOps unassigned_mem_ops = { |
3235 |
.read = unassigned_mem_read, |
3236 |
.write = unassigned_mem_write, |
3237 |
.endianness = DEVICE_NATIVE_ENDIAN, |
3238 |
}; |
3239 |
|
3240 |
static uint64_t error_mem_read(void *opaque, target_phys_addr_t addr, |
3241 |
unsigned size)
|
3242 |
{ |
3243 |
abort(); |
3244 |
} |
3245 |
|
3246 |
static void error_mem_write(void *opaque, target_phys_addr_t addr, |
3247 |
uint64_t value, unsigned size)
|
3248 |
{ |
3249 |
abort(); |
3250 |
} |
3251 |
|
3252 |
static const MemoryRegionOps error_mem_ops = { |
3253 |
.read = error_mem_read, |
3254 |
.write = error_mem_write, |
3255 |
.endianness = DEVICE_NATIVE_ENDIAN, |
3256 |
}; |
3257 |
|
3258 |
static const MemoryRegionOps rom_mem_ops = { |
3259 |
.read = error_mem_read, |
3260 |
.write = unassigned_mem_write, |
3261 |
.endianness = DEVICE_NATIVE_ENDIAN, |
3262 |
}; |
3263 |
|
3264 |
static void notdirty_mem_write(void *opaque, target_phys_addr_t ram_addr, |
3265 |
uint64_t val, unsigned size)
|
3266 |
{ |
3267 |
int dirty_flags;
|
3268 |
dirty_flags = cpu_physical_memory_get_dirty_flags(ram_addr); |
3269 |
if (!(dirty_flags & CODE_DIRTY_FLAG)) {
|
3270 |
#if !defined(CONFIG_USER_ONLY)
|
3271 |
tb_invalidate_phys_page_fast(ram_addr, size); |
3272 |
dirty_flags = cpu_physical_memory_get_dirty_flags(ram_addr); |
3273 |
#endif
|
3274 |
} |
3275 |
switch (size) {
|
3276 |
case 1: |
3277 |
stb_p(qemu_get_ram_ptr(ram_addr), val); |
3278 |
break;
|
3279 |
case 2: |
3280 |
stw_p(qemu_get_ram_ptr(ram_addr), val); |
3281 |
break;
|
3282 |
case 4: |
3283 |
stl_p(qemu_get_ram_ptr(ram_addr), val); |
3284 |
break;
|
3285 |
default:
|
3286 |
abort(); |
3287 |
} |
3288 |
dirty_flags |= (0xff & ~CODE_DIRTY_FLAG);
|
3289 |
cpu_physical_memory_set_dirty_flags(ram_addr, dirty_flags); |
3290 |
/* we remove the notdirty callback only if the code has been
|
3291 |
flushed */
|
3292 |
if (dirty_flags == 0xff) |
3293 |
tlb_set_dirty(cpu_single_env, cpu_single_env->mem_io_vaddr); |
3294 |
} |
3295 |
|
3296 |
static const MemoryRegionOps notdirty_mem_ops = { |
3297 |
.read = error_mem_read, |
3298 |
.write = notdirty_mem_write, |
3299 |
.endianness = DEVICE_NATIVE_ENDIAN, |
3300 |
}; |
3301 |
|
3302 |
/* Generate a debug exception if a watchpoint has been hit. */
|
3303 |
static void check_watchpoint(int offset, int len_mask, int flags) |
3304 |
{ |
3305 |
CPUState *env = cpu_single_env; |
3306 |
target_ulong pc, cs_base; |
3307 |
TranslationBlock *tb; |
3308 |
target_ulong vaddr; |
3309 |
CPUWatchpoint *wp; |
3310 |
int cpu_flags;
|
3311 |
|
3312 |
if (env->watchpoint_hit) {
|
3313 |
/* We re-entered the check after replacing the TB. Now raise
|
3314 |
* the debug interrupt so that is will trigger after the
|
3315 |
* current instruction. */
|
3316 |
cpu_interrupt(env, CPU_INTERRUPT_DEBUG); |
3317 |
return;
|
3318 |
} |
3319 |
vaddr = (env->mem_io_vaddr & TARGET_PAGE_MASK) + offset; |
3320 |
QTAILQ_FOREACH(wp, &env->watchpoints, entry) { |
3321 |
if ((vaddr == (wp->vaddr & len_mask) ||
|
3322 |
(vaddr & wp->len_mask) == wp->vaddr) && (wp->flags & flags)) { |
3323 |
wp->flags |= BP_WATCHPOINT_HIT; |
3324 |
if (!env->watchpoint_hit) {
|
3325 |
env->watchpoint_hit = wp; |
3326 |
tb = tb_find_pc(env->mem_io_pc); |
3327 |
if (!tb) {
|
3328 |
cpu_abort(env, "check_watchpoint: could not find TB for "
|
3329 |
"pc=%p", (void *)env->mem_io_pc); |
3330 |
} |
3331 |
cpu_restore_state(tb, env, env->mem_io_pc); |
3332 |
tb_phys_invalidate(tb, -1);
|
3333 |
if (wp->flags & BP_STOP_BEFORE_ACCESS) {
|
3334 |
env->exception_index = EXCP_DEBUG; |
3335 |
cpu_loop_exit(env); |
3336 |
} else {
|
3337 |
cpu_get_tb_cpu_state(env, &pc, &cs_base, &cpu_flags); |
3338 |
tb_gen_code(env, pc, cs_base, cpu_flags, 1);
|
3339 |
cpu_resume_from_signal(env, NULL);
|
3340 |
} |
3341 |
} |
3342 |
} else {
|
3343 |
wp->flags &= ~BP_WATCHPOINT_HIT; |
3344 |
} |
3345 |
} |
3346 |
} |
3347 |
|
3348 |
/* Watchpoint access routines. Watchpoints are inserted using TLB tricks,
|
3349 |
so these check for a hit then pass through to the normal out-of-line
|
3350 |
phys routines. */
|
3351 |
static uint64_t watch_mem_read(void *opaque, target_phys_addr_t addr, |
3352 |
unsigned size)
|
3353 |
{ |
3354 |
check_watchpoint(addr & ~TARGET_PAGE_MASK, ~(size - 1), BP_MEM_READ);
|
3355 |
switch (size) {
|
3356 |
case 1: return ldub_phys(addr); |
3357 |
case 2: return lduw_phys(addr); |
3358 |
case 4: return ldl_phys(addr); |
3359 |
default: abort();
|
3360 |
} |
3361 |
} |
3362 |
|
3363 |
static void watch_mem_write(void *opaque, target_phys_addr_t addr, |
3364 |
uint64_t val, unsigned size)
|
3365 |
{ |
3366 |
check_watchpoint(addr & ~TARGET_PAGE_MASK, ~(size - 1), BP_MEM_WRITE);
|
3367 |
switch (size) {
|
3368 |
case 1: |
3369 |
stb_phys(addr, val); |
3370 |
break;
|
3371 |
case 2: |
3372 |
stw_phys(addr, val); |
3373 |
break;
|
3374 |
case 4: |
3375 |
stl_phys(addr, val); |
3376 |
break;
|
3377 |
default: abort();
|
3378 |
} |
3379 |
} |
3380 |
|
3381 |
static const MemoryRegionOps watch_mem_ops = { |
3382 |
.read = watch_mem_read, |
3383 |
.write = watch_mem_write, |
3384 |
.endianness = DEVICE_NATIVE_ENDIAN, |
3385 |
}; |
3386 |
|
3387 |
static uint64_t subpage_read(void *opaque, target_phys_addr_t addr, |
3388 |
unsigned len)
|
3389 |
{ |
3390 |
subpage_t *mmio = opaque; |
3391 |
unsigned int idx = SUBPAGE_IDX(addr); |
3392 |
MemoryRegionSection *section; |
3393 |
#if defined(DEBUG_SUBPAGE)
|
3394 |
printf("%s: subpage %p len %d addr " TARGET_FMT_plx " idx %d\n", __func__, |
3395 |
mmio, len, addr, idx); |
3396 |
#endif
|
3397 |
|
3398 |
section = &phys_sections[mmio->sub_section[idx]]; |
3399 |
addr += mmio->base; |
3400 |
addr -= section->offset_within_address_space; |
3401 |
addr += section->offset_within_region; |
3402 |
return io_mem_read(section->mr, addr, len);
|
3403 |
} |
3404 |
|
3405 |
static void subpage_write(void *opaque, target_phys_addr_t addr, |
3406 |
uint64_t value, unsigned len)
|
3407 |
{ |
3408 |
subpage_t *mmio = opaque; |
3409 |
unsigned int idx = SUBPAGE_IDX(addr); |
3410 |
MemoryRegionSection *section; |
3411 |
#if defined(DEBUG_SUBPAGE)
|
3412 |
printf("%s: subpage %p len %d addr " TARGET_FMT_plx
|
3413 |
" idx %d value %"PRIx64"\n", |
3414 |
__func__, mmio, len, addr, idx, value); |
3415 |
#endif
|
3416 |
|
3417 |
section = &phys_sections[mmio->sub_section[idx]]; |
3418 |
addr += mmio->base; |
3419 |
addr -= section->offset_within_address_space; |
3420 |
addr += section->offset_within_region; |
3421 |
io_mem_write(section->mr, addr, value, len); |
3422 |
} |
3423 |
|
3424 |
static const MemoryRegionOps subpage_ops = { |
3425 |
.read = subpage_read, |
3426 |
.write = subpage_write, |
3427 |
.endianness = DEVICE_NATIVE_ENDIAN, |
3428 |
}; |
3429 |
|
3430 |
static uint64_t subpage_ram_read(void *opaque, target_phys_addr_t addr, |
3431 |
unsigned size)
|
3432 |
{ |
3433 |
ram_addr_t raddr = addr; |
3434 |
void *ptr = qemu_get_ram_ptr(raddr);
|
3435 |
switch (size) {
|
3436 |
case 1: return ldub_p(ptr); |
3437 |
case 2: return lduw_p(ptr); |
3438 |
case 4: return ldl_p(ptr); |
3439 |
default: abort();
|
3440 |
} |
3441 |
} |
3442 |
|
3443 |
static void subpage_ram_write(void *opaque, target_phys_addr_t addr, |
3444 |
uint64_t value, unsigned size)
|
3445 |
{ |
3446 |
ram_addr_t raddr = addr; |
3447 |
void *ptr = qemu_get_ram_ptr(raddr);
|
3448 |
switch (size) {
|
3449 |
case 1: return stb_p(ptr, value); |
3450 |
case 2: return stw_p(ptr, value); |
3451 |
case 4: return stl_p(ptr, value); |
3452 |
default: abort();
|
3453 |
} |
3454 |
} |
3455 |
|
3456 |
static const MemoryRegionOps subpage_ram_ops = { |
3457 |
.read = subpage_ram_read, |
3458 |
.write = subpage_ram_write, |
3459 |
.endianness = DEVICE_NATIVE_ENDIAN, |
3460 |
}; |
3461 |
|
3462 |
static int subpage_register (subpage_t *mmio, uint32_t start, uint32_t end, |
3463 |
uint16_t section) |
3464 |
{ |
3465 |
int idx, eidx;
|
3466 |
|
3467 |
if (start >= TARGET_PAGE_SIZE || end >= TARGET_PAGE_SIZE)
|
3468 |
return -1; |
3469 |
idx = SUBPAGE_IDX(start); |
3470 |
eidx = SUBPAGE_IDX(end); |
3471 |
#if defined(DEBUG_SUBPAGE)
|
3472 |
printf("%s: %p start %08x end %08x idx %08x eidx %08x mem %ld\n", __func__,
|
3473 |
mmio, start, end, idx, eidx, memory); |
3474 |
#endif
|
3475 |
if (memory_region_is_ram(phys_sections[section].mr)) {
|
3476 |
MemoryRegionSection new_section = phys_sections[section]; |
3477 |
new_section.mr = &io_mem_subpage_ram; |
3478 |
section = phys_section_add(&new_section); |
3479 |
} |
3480 |
for (; idx <= eidx; idx++) {
|
3481 |
mmio->sub_section[idx] = section; |
3482 |
} |
3483 |
|
3484 |
return 0; |
3485 |
} |
3486 |
|
3487 |
static subpage_t *subpage_init(target_phys_addr_t base)
|
3488 |
{ |
3489 |
subpage_t *mmio; |
3490 |
|
3491 |
mmio = g_malloc0(sizeof(subpage_t));
|
3492 |
|
3493 |
mmio->base = base; |
3494 |
memory_region_init_io(&mmio->iomem, &subpage_ops, mmio, |
3495 |
"subpage", TARGET_PAGE_SIZE);
|
3496 |
mmio->iomem.subpage = true;
|
3497 |
#if defined(DEBUG_SUBPAGE)
|
3498 |
printf("%s: %p base " TARGET_FMT_plx " len %08x %d\n", __func__, |
3499 |
mmio, base, TARGET_PAGE_SIZE, subpage_memory); |
3500 |
#endif
|
3501 |
subpage_register(mmio, 0, TARGET_PAGE_SIZE-1, phys_section_unassigned); |
3502 |
|
3503 |
return mmio;
|
3504 |
} |
3505 |
|
3506 |
static int get_free_io_mem_idx(void) |
3507 |
{ |
3508 |
int i;
|
3509 |
|
3510 |
for (i = 0; i<IO_MEM_NB_ENTRIES; i++) |
3511 |
if (!io_mem_used[i]) {
|
3512 |
io_mem_used[i] = 1;
|
3513 |
return i;
|
3514 |
} |
3515 |
fprintf(stderr, "RAN out out io_mem_idx, max %d !\n", IO_MEM_NB_ENTRIES);
|
3516 |
return -1; |
3517 |
} |
3518 |
|
3519 |
/* mem_read and mem_write are arrays of functions containing the
|
3520 |
function to access byte (index 0), word (index 1) and dword (index
|
3521 |
2). Functions can be omitted with a NULL function pointer.
|
3522 |
If io_index is non zero, the corresponding io zone is
|
3523 |
modified. If it is zero, a new io zone is allocated. The return
|
3524 |
value can be used with cpu_register_physical_memory(). (-1) is
|
3525 |
returned if error. */
|
3526 |
static int cpu_register_io_memory_fixed(int io_index, MemoryRegion *mr) |
3527 |
{ |
3528 |
if (io_index <= 0) { |
3529 |
io_index = get_free_io_mem_idx(); |
3530 |
if (io_index == -1) |
3531 |
return io_index;
|
3532 |
} else {
|
3533 |
if (io_index >= IO_MEM_NB_ENTRIES)
|
3534 |
return -1; |
3535 |
} |
3536 |
|
3537 |
io_mem_region[io_index] = mr; |
3538 |
|
3539 |
return io_index;
|
3540 |
} |
3541 |
|
3542 |
int cpu_register_io_memory(MemoryRegion *mr)
|
3543 |
{ |
3544 |
return cpu_register_io_memory_fixed(0, mr); |
3545 |
} |
3546 |
|
3547 |
void cpu_unregister_io_memory(int io_index) |
3548 |
{ |
3549 |
io_mem_region[io_index] = NULL;
|
3550 |
io_mem_used[io_index] = 0;
|
3551 |
} |
3552 |
|
3553 |
static uint16_t dummy_section(MemoryRegion *mr)
|
3554 |
{ |
3555 |
MemoryRegionSection section = { |
3556 |
.mr = mr, |
3557 |
.offset_within_address_space = 0,
|
3558 |
.offset_within_region = 0,
|
3559 |
.size = UINT64_MAX, |
3560 |
}; |
3561 |
|
3562 |
return phys_section_add(§ion);
|
3563 |
} |
3564 |
|
3565 |
MemoryRegion *iotlb_to_region(target_phys_addr_t index) |
3566 |
{ |
3567 |
return phys_sections[index & ~TARGET_PAGE_MASK].mr;
|
3568 |
} |
3569 |
|
3570 |
static void io_mem_init(void) |
3571 |
{ |
3572 |
int i;
|
3573 |
|
3574 |
/* Must be first: */
|
3575 |
memory_region_init_io(&io_mem_ram, &error_mem_ops, NULL, "ram", UINT64_MAX); |
3576 |
assert(io_mem_ram.ram_addr == 0);
|
3577 |
memory_region_init_io(&io_mem_rom, &rom_mem_ops, NULL, "rom", UINT64_MAX); |
3578 |
memory_region_init_io(&io_mem_unassigned, &unassigned_mem_ops, NULL,
|
3579 |
"unassigned", UINT64_MAX);
|
3580 |
memory_region_init_io(&io_mem_notdirty, ¬dirty_mem_ops, NULL,
|
3581 |
"notdirty", UINT64_MAX);
|
3582 |
memory_region_init_io(&io_mem_subpage_ram, &subpage_ram_ops, NULL,
|
3583 |
"subpage-ram", UINT64_MAX);
|
3584 |
for (i=0; i<5; i++) |
3585 |
io_mem_used[i] = 1;
|
3586 |
|
3587 |
memory_region_init_io(&io_mem_watch, &watch_mem_ops, NULL,
|
3588 |
"watch", UINT64_MAX);
|
3589 |
} |
3590 |
|
3591 |
static void core_begin(MemoryListener *listener) |
3592 |
{ |
3593 |
destroy_all_mappings(); |
3594 |
phys_sections_clear(); |
3595 |
phys_map.ptr = PHYS_MAP_NODE_NIL; |
3596 |
phys_section_unassigned = dummy_section(&io_mem_unassigned); |
3597 |
phys_section_notdirty = dummy_section(&io_mem_notdirty); |
3598 |
phys_section_rom = dummy_section(&io_mem_rom); |
3599 |
phys_section_watch = dummy_section(&io_mem_watch); |
3600 |
} |
3601 |
|
3602 |
static void core_commit(MemoryListener *listener) |
3603 |
{ |
3604 |
CPUState *env; |
3605 |
|
3606 |
/* since each CPU stores ram addresses in its TLB cache, we must
|
3607 |
reset the modified entries */
|
3608 |
/* XXX: slow ! */
|
3609 |
for(env = first_cpu; env != NULL; env = env->next_cpu) { |
3610 |
tlb_flush(env, 1);
|
3611 |
} |
3612 |
} |
3613 |
|
3614 |
static void core_region_add(MemoryListener *listener, |
3615 |
MemoryRegionSection *section) |
3616 |
{ |
3617 |
cpu_register_physical_memory_log(section, section->readonly); |
3618 |
} |
3619 |
|
3620 |
static void core_region_del(MemoryListener *listener, |
3621 |
MemoryRegionSection *section) |
3622 |
{ |
3623 |
} |
3624 |
|
3625 |
static void core_region_nop(MemoryListener *listener, |
3626 |
MemoryRegionSection *section) |
3627 |
{ |
3628 |
cpu_register_physical_memory_log(section, section->readonly); |
3629 |
} |
3630 |
|
3631 |
static void core_log_start(MemoryListener *listener, |
3632 |
MemoryRegionSection *section) |
3633 |
{ |
3634 |
} |
3635 |
|
3636 |
static void core_log_stop(MemoryListener *listener, |
3637 |
MemoryRegionSection *section) |
3638 |
{ |
3639 |
} |
3640 |
|
3641 |
static void core_log_sync(MemoryListener *listener, |
3642 |
MemoryRegionSection *section) |
3643 |
{ |
3644 |
} |
3645 |
|
3646 |
static void core_log_global_start(MemoryListener *listener) |
3647 |
{ |
3648 |
cpu_physical_memory_set_dirty_tracking(1);
|
3649 |
} |
3650 |
|
3651 |
static void core_log_global_stop(MemoryListener *listener) |
3652 |
{ |
3653 |
cpu_physical_memory_set_dirty_tracking(0);
|
3654 |
} |
3655 |
|
3656 |
static void core_eventfd_add(MemoryListener *listener, |
3657 |
MemoryRegionSection *section, |
3658 |
bool match_data, uint64_t data, int fd) |
3659 |
{ |
3660 |
} |
3661 |
|
3662 |
static void core_eventfd_del(MemoryListener *listener, |
3663 |
MemoryRegionSection *section, |
3664 |
bool match_data, uint64_t data, int fd) |
3665 |
{ |
3666 |
} |
3667 |
|
3668 |
static void io_begin(MemoryListener *listener) |
3669 |
{ |
3670 |
} |
3671 |
|
3672 |
static void io_commit(MemoryListener *listener) |
3673 |
{ |
3674 |
} |
3675 |
|
3676 |
static void io_region_add(MemoryListener *listener, |
3677 |
MemoryRegionSection *section) |
3678 |
{ |
3679 |
MemoryRegionIORange *mrio = g_new(MemoryRegionIORange, 1);
|
3680 |
|
3681 |
mrio->mr = section->mr; |
3682 |
mrio->offset = section->offset_within_region; |
3683 |
iorange_init(&mrio->iorange, &memory_region_iorange_ops, |
3684 |
section->offset_within_address_space, section->size); |
3685 |
ioport_register(&mrio->iorange); |
3686 |
} |
3687 |
|
3688 |
static void io_region_del(MemoryListener *listener, |
3689 |
MemoryRegionSection *section) |
3690 |
{ |
3691 |
isa_unassign_ioport(section->offset_within_address_space, section->size); |
3692 |
} |
3693 |
|
3694 |
static void io_region_nop(MemoryListener *listener, |
3695 |
MemoryRegionSection *section) |
3696 |
{ |
3697 |
} |
3698 |
|
3699 |
static void io_log_start(MemoryListener *listener, |
3700 |
MemoryRegionSection *section) |
3701 |
{ |
3702 |
} |
3703 |
|
3704 |
static void io_log_stop(MemoryListener *listener, |
3705 |
MemoryRegionSection *section) |
3706 |
{ |
3707 |
} |
3708 |
|
3709 |
static void io_log_sync(MemoryListener *listener, |
3710 |
MemoryRegionSection *section) |
3711 |
{ |
3712 |
} |
3713 |
|
3714 |
static void io_log_global_start(MemoryListener *listener) |
3715 |
{ |
3716 |
} |
3717 |
|
3718 |
static void io_log_global_stop(MemoryListener *listener) |
3719 |
{ |
3720 |
} |
3721 |
|
3722 |
static void io_eventfd_add(MemoryListener *listener, |
3723 |
MemoryRegionSection *section, |
3724 |
bool match_data, uint64_t data, int fd) |
3725 |
{ |
3726 |
} |
3727 |
|
3728 |
static void io_eventfd_del(MemoryListener *listener, |
3729 |
MemoryRegionSection *section, |
3730 |
bool match_data, uint64_t data, int fd) |
3731 |
{ |
3732 |
} |
3733 |
|
3734 |
static MemoryListener core_memory_listener = {
|
3735 |
.begin = core_begin, |
3736 |
.commit = core_commit, |
3737 |
.region_add = core_region_add, |
3738 |
.region_del = core_region_del, |
3739 |
.region_nop = core_region_nop, |
3740 |
.log_start = core_log_start, |
3741 |
.log_stop = core_log_stop, |
3742 |
.log_sync = core_log_sync, |
3743 |
.log_global_start = core_log_global_start, |
3744 |
.log_global_stop = core_log_global_stop, |
3745 |
.eventfd_add = core_eventfd_add, |
3746 |
.eventfd_del = core_eventfd_del, |
3747 |
.priority = 0,
|
3748 |
}; |
3749 |
|
3750 |
static MemoryListener io_memory_listener = {
|
3751 |
.begin = io_begin, |
3752 |
.commit = io_commit, |
3753 |
.region_add = io_region_add, |
3754 |
.region_del = io_region_del, |
3755 |
.region_nop = io_region_nop, |
3756 |
.log_start = io_log_start, |
3757 |
.log_stop = io_log_stop, |
3758 |
.log_sync = io_log_sync, |
3759 |
.log_global_start = io_log_global_start, |
3760 |
.log_global_stop = io_log_global_stop, |
3761 |
.eventfd_add = io_eventfd_add, |
3762 |
.eventfd_del = io_eventfd_del, |
3763 |
.priority = 0,
|
3764 |
}; |
3765 |
|
3766 |
static void memory_map_init(void) |
3767 |
{ |
3768 |
system_memory = g_malloc(sizeof(*system_memory));
|
3769 |
memory_region_init(system_memory, "system", INT64_MAX);
|
3770 |
set_system_memory_map(system_memory); |
3771 |
|
3772 |
system_io = g_malloc(sizeof(*system_io));
|
3773 |
memory_region_init(system_io, "io", 65536); |
3774 |
set_system_io_map(system_io); |
3775 |
|
3776 |
memory_listener_register(&core_memory_listener, system_memory); |
3777 |
memory_listener_register(&io_memory_listener, system_io); |
3778 |
} |
3779 |
|
3780 |
MemoryRegion *get_system_memory(void)
|
3781 |
{ |
3782 |
return system_memory;
|
3783 |
} |
3784 |
|
3785 |
MemoryRegion *get_system_io(void)
|
3786 |
{ |
3787 |
return system_io;
|
3788 |
} |
3789 |
|
3790 |
#endif /* !defined(CONFIG_USER_ONLY) */ |
3791 |
|
3792 |
/* physical memory access (slow version, mainly for debug) */
|
3793 |
#if defined(CONFIG_USER_ONLY)
|
3794 |
int cpu_memory_rw_debug(CPUState *env, target_ulong addr,
|
3795 |
uint8_t *buf, int len, int is_write) |
3796 |
{ |
3797 |
int l, flags;
|
3798 |
target_ulong page; |
3799 |
void * p;
|
3800 |
|
3801 |
while (len > 0) { |
3802 |
page = addr & TARGET_PAGE_MASK; |
3803 |
l = (page + TARGET_PAGE_SIZE) - addr; |
3804 |
if (l > len)
|
3805 |
l = len; |
3806 |
flags = page_get_flags(page); |
3807 |
if (!(flags & PAGE_VALID))
|
3808 |
return -1; |
3809 |
if (is_write) {
|
3810 |
if (!(flags & PAGE_WRITE))
|
3811 |
return -1; |
3812 |
/* XXX: this code should not depend on lock_user */
|
3813 |
if (!(p = lock_user(VERIFY_WRITE, addr, l, 0))) |
3814 |
return -1; |
3815 |
memcpy(p, buf, l); |
3816 |
unlock_user(p, addr, l); |
3817 |
} else {
|
3818 |
if (!(flags & PAGE_READ))
|
3819 |
return -1; |
3820 |
/* XXX: this code should not depend on lock_user */
|
3821 |
if (!(p = lock_user(VERIFY_READ, addr, l, 1))) |
3822 |
return -1; |
3823 |
memcpy(buf, p, l); |
3824 |
unlock_user(p, addr, 0);
|
3825 |
} |
3826 |
len -= l; |
3827 |
buf += l; |
3828 |
addr += l; |
3829 |
} |
3830 |
return 0; |
3831 |
} |
3832 |
|
3833 |
#else
|
3834 |
void cpu_physical_memory_rw(target_phys_addr_t addr, uint8_t *buf,
|
3835 |
int len, int is_write) |
3836 |
{ |
3837 |
int l;
|
3838 |
uint8_t *ptr; |
3839 |
uint32_t val; |
3840 |
target_phys_addr_t page; |
3841 |
MemoryRegionSection *section; |
3842 |
|
3843 |
while (len > 0) { |
3844 |
page = addr & TARGET_PAGE_MASK; |
3845 |
l = (page + TARGET_PAGE_SIZE) - addr; |
3846 |
if (l > len)
|
3847 |
l = len; |
3848 |
section = phys_page_find(page >> TARGET_PAGE_BITS); |
3849 |
|
3850 |
if (is_write) {
|
3851 |
if (!memory_region_is_ram(section->mr)) {
|
3852 |
target_phys_addr_t addr1; |
3853 |
addr1 = section_addr(section, addr); |
3854 |
/* XXX: could force cpu_single_env to NULL to avoid
|
3855 |
potential bugs */
|
3856 |
if (l >= 4 && ((addr1 & 3) == 0)) { |
3857 |
/* 32 bit write access */
|
3858 |
val = ldl_p(buf); |
3859 |
io_mem_write(section->mr, addr1, val, 4);
|
3860 |
l = 4;
|
3861 |
} else if (l >= 2 && ((addr1 & 1) == 0)) { |
3862 |
/* 16 bit write access */
|
3863 |
val = lduw_p(buf); |
3864 |
io_mem_write(section->mr, addr1, val, 2);
|
3865 |
l = 2;
|
3866 |
} else {
|
3867 |
/* 8 bit write access */
|
3868 |
val = ldub_p(buf); |
3869 |
io_mem_write(section->mr, addr1, val, 1);
|
3870 |
l = 1;
|
3871 |
} |
3872 |
} else if (!section->readonly) { |
3873 |
ram_addr_t addr1; |
3874 |
addr1 = memory_region_get_ram_addr(section->mr) |
3875 |
+ section_addr(section, addr); |
3876 |
/* RAM case */
|
3877 |
ptr = qemu_get_ram_ptr(addr1); |
3878 |
memcpy(ptr, buf, l); |
3879 |
if (!cpu_physical_memory_is_dirty(addr1)) {
|
3880 |
/* invalidate code */
|
3881 |
tb_invalidate_phys_page_range(addr1, addr1 + l, 0);
|
3882 |
/* set dirty bit */
|
3883 |
cpu_physical_memory_set_dirty_flags( |
3884 |
addr1, (0xff & ~CODE_DIRTY_FLAG));
|
3885 |
} |
3886 |
qemu_put_ram_ptr(ptr); |
3887 |
} |
3888 |
} else {
|
3889 |
if (!is_ram_rom_romd(section)) {
|
3890 |
target_phys_addr_t addr1; |
3891 |
/* I/O case */
|
3892 |
addr1 = section_addr(section, addr); |
3893 |
if (l >= 4 && ((addr1 & 3) == 0)) { |
3894 |
/* 32 bit read access */
|
3895 |
val = io_mem_read(section->mr, addr1, 4);
|
3896 |
stl_p(buf, val); |
3897 |
l = 4;
|
3898 |
} else if (l >= 2 && ((addr1 & 1) == 0)) { |
3899 |
/* 16 bit read access */
|
3900 |
val = io_mem_read(section->mr, addr1, 2);
|
3901 |
stw_p(buf, val); |
3902 |
l = 2;
|
3903 |
} else {
|
3904 |
/* 8 bit read access */
|
3905 |
val = io_mem_read(section->mr, addr1, 1);
|
3906 |
stb_p(buf, val); |
3907 |
l = 1;
|
3908 |
} |
3909 |
} else {
|
3910 |
/* RAM case */
|
3911 |
ptr = qemu_get_ram_ptr(section->mr->ram_addr) |
3912 |
+ section_addr(section, addr); |
3913 |
memcpy(buf, ptr, l); |
3914 |
qemu_put_ram_ptr(ptr); |
3915 |
} |
3916 |
} |
3917 |
len -= l; |
3918 |
buf += l; |
3919 |
addr += l; |
3920 |
} |
3921 |
} |
3922 |
|
3923 |
/* used for ROM loading : can write in RAM and ROM */
|
3924 |
void cpu_physical_memory_write_rom(target_phys_addr_t addr,
|
3925 |
const uint8_t *buf, int len) |
3926 |
{ |
3927 |
int l;
|
3928 |
uint8_t *ptr; |
3929 |
target_phys_addr_t page; |
3930 |
MemoryRegionSection *section; |
3931 |
|
3932 |
while (len > 0) { |
3933 |
page = addr & TARGET_PAGE_MASK; |
3934 |
l = (page + TARGET_PAGE_SIZE) - addr; |
3935 |
if (l > len)
|
3936 |
l = len; |
3937 |
section = phys_page_find(page >> TARGET_PAGE_BITS); |
3938 |
|
3939 |
if (!is_ram_rom_romd(section)) {
|
3940 |
/* do nothing */
|
3941 |
} else {
|
3942 |
unsigned long addr1; |
3943 |
addr1 = memory_region_get_ram_addr(section->mr) |
3944 |
+ section_addr(section, addr); |
3945 |
/* ROM/RAM case */
|
3946 |
ptr = qemu_get_ram_ptr(addr1); |
3947 |
memcpy(ptr, buf, l); |
3948 |
qemu_put_ram_ptr(ptr); |
3949 |
} |
3950 |
len -= l; |
3951 |
buf += l; |
3952 |
addr += l; |
3953 |
} |
3954 |
} |
3955 |
|
3956 |
typedef struct { |
3957 |
void *buffer;
|
3958 |
target_phys_addr_t addr; |
3959 |
target_phys_addr_t len; |
3960 |
} BounceBuffer; |
3961 |
|
3962 |
static BounceBuffer bounce;
|
3963 |
|
3964 |
typedef struct MapClient { |
3965 |
void *opaque;
|
3966 |
void (*callback)(void *opaque); |
3967 |
QLIST_ENTRY(MapClient) link; |
3968 |
} MapClient; |
3969 |
|
3970 |
static QLIST_HEAD(map_client_list, MapClient) map_client_list
|
3971 |
= QLIST_HEAD_INITIALIZER(map_client_list); |
3972 |
|
3973 |
void *cpu_register_map_client(void *opaque, void (*callback)(void *opaque)) |
3974 |
{ |
3975 |
MapClient *client = g_malloc(sizeof(*client));
|
3976 |
|
3977 |
client->opaque = opaque; |
3978 |
client->callback = callback; |
3979 |
QLIST_INSERT_HEAD(&map_client_list, client, link); |
3980 |
return client;
|
3981 |
} |
3982 |
|
3983 |
void cpu_unregister_map_client(void *_client) |
3984 |
{ |
3985 |
MapClient *client = (MapClient *)_client; |
3986 |
|
3987 |
QLIST_REMOVE(client, link); |
3988 |
g_free(client); |
3989 |
} |
3990 |
|
3991 |
static void cpu_notify_map_clients(void) |
3992 |
{ |
3993 |
MapClient *client; |
3994 |
|
3995 |
while (!QLIST_EMPTY(&map_client_list)) {
|
3996 |
client = QLIST_FIRST(&map_client_list); |
3997 |
client->callback(client->opaque); |
3998 |
cpu_unregister_map_client(client); |
3999 |
} |
4000 |
} |
4001 |
|
4002 |
/* Map a physical memory region into a host virtual address.
|
4003 |
* May map a subset of the requested range, given by and returned in *plen.
|
4004 |
* May return NULL if resources needed to perform the mapping are exhausted.
|
4005 |
* Use only for reads OR writes - not for read-modify-write operations.
|
4006 |
* Use cpu_register_map_client() to know when retrying the map operation is
|
4007 |
* likely to succeed.
|
4008 |
*/
|
4009 |
void *cpu_physical_memory_map(target_phys_addr_t addr,
|
4010 |
target_phys_addr_t *plen, |
4011 |
int is_write)
|
4012 |
{ |
4013 |
target_phys_addr_t len = *plen; |
4014 |
target_phys_addr_t todo = 0;
|
4015 |
int l;
|
4016 |
target_phys_addr_t page; |
4017 |
MemoryRegionSection *section; |
4018 |
ram_addr_t raddr = RAM_ADDR_MAX; |
4019 |
ram_addr_t rlen; |
4020 |
void *ret;
|
4021 |
|
4022 |
while (len > 0) { |
4023 |
page = addr & TARGET_PAGE_MASK; |
4024 |
l = (page + TARGET_PAGE_SIZE) - addr; |
4025 |
if (l > len)
|
4026 |
l = len; |
4027 |
section = phys_page_find(page >> TARGET_PAGE_BITS); |
4028 |
|
4029 |
if (!(memory_region_is_ram(section->mr) && !section->readonly)) {
|
4030 |
if (todo || bounce.buffer) {
|
4031 |
break;
|
4032 |
} |
4033 |
bounce.buffer = qemu_memalign(TARGET_PAGE_SIZE, TARGET_PAGE_SIZE); |
4034 |
bounce.addr = addr; |
4035 |
bounce.len = l; |
4036 |
if (!is_write) {
|
4037 |
cpu_physical_memory_read(addr, bounce.buffer, l); |
4038 |
} |
4039 |
|
4040 |
*plen = l; |
4041 |
return bounce.buffer;
|
4042 |
} |
4043 |
if (!todo) {
|
4044 |
raddr = memory_region_get_ram_addr(section->mr) |
4045 |
+ section_addr(section, addr); |
4046 |
} |
4047 |
|
4048 |
len -= l; |
4049 |
addr += l; |
4050 |
todo += l; |
4051 |
} |
4052 |
rlen = todo; |
4053 |
ret = qemu_ram_ptr_length(raddr, &rlen); |
4054 |
*plen = rlen; |
4055 |
return ret;
|
4056 |
} |
4057 |
|
4058 |
/* Unmaps a memory region previously mapped by cpu_physical_memory_map().
|
4059 |
* Will also mark the memory as dirty if is_write == 1. access_len gives
|
4060 |
* the amount of memory that was actually read or written by the caller.
|
4061 |
*/
|
4062 |
void cpu_physical_memory_unmap(void *buffer, target_phys_addr_t len, |
4063 |
int is_write, target_phys_addr_t access_len)
|
4064 |
{ |
4065 |
if (buffer != bounce.buffer) {
|
4066 |
if (is_write) {
|
4067 |
ram_addr_t addr1 = qemu_ram_addr_from_host_nofail(buffer); |
4068 |
while (access_len) {
|
4069 |
unsigned l;
|
4070 |
l = TARGET_PAGE_SIZE; |
4071 |
if (l > access_len)
|
4072 |
l = access_len; |
4073 |
if (!cpu_physical_memory_is_dirty(addr1)) {
|
4074 |
/* invalidate code */
|
4075 |
tb_invalidate_phys_page_range(addr1, addr1 + l, 0);
|
4076 |
/* set dirty bit */
|
4077 |
cpu_physical_memory_set_dirty_flags( |
4078 |
addr1, (0xff & ~CODE_DIRTY_FLAG));
|
4079 |
} |
4080 |
addr1 += l; |
4081 |
access_len -= l; |
4082 |
} |
4083 |
} |
4084 |
if (xen_enabled()) {
|
4085 |
xen_invalidate_map_cache_entry(buffer); |
4086 |
} |
4087 |
return;
|
4088 |
} |
4089 |
if (is_write) {
|
4090 |
cpu_physical_memory_write(bounce.addr, bounce.buffer, access_len); |
4091 |
} |
4092 |
qemu_vfree(bounce.buffer); |
4093 |
bounce.buffer = NULL;
|
4094 |
cpu_notify_map_clients(); |
4095 |
} |
4096 |
|
4097 |
/* warning: addr must be aligned */
|
4098 |
static inline uint32_t ldl_phys_internal(target_phys_addr_t addr, |
4099 |
enum device_endian endian)
|
4100 |
{ |
4101 |
uint8_t *ptr; |
4102 |
uint32_t val; |
4103 |
MemoryRegionSection *section; |
4104 |
|
4105 |
section = phys_page_find(addr >> TARGET_PAGE_BITS); |
4106 |
|
4107 |
if (!is_ram_rom_romd(section)) {
|
4108 |
/* I/O case */
|
4109 |
addr = section_addr(section, addr); |
4110 |
val = io_mem_read(section->mr, addr, 4);
|
4111 |
#if defined(TARGET_WORDS_BIGENDIAN)
|
4112 |
if (endian == DEVICE_LITTLE_ENDIAN) {
|
4113 |
val = bswap32(val); |
4114 |
} |
4115 |
#else
|
4116 |
if (endian == DEVICE_BIG_ENDIAN) {
|
4117 |
val = bswap32(val); |
4118 |
} |
4119 |
#endif
|
4120 |
} else {
|
4121 |
/* RAM case */
|
4122 |
ptr = qemu_get_ram_ptr((memory_region_get_ram_addr(section->mr) |
4123 |
& TARGET_PAGE_MASK) |
4124 |
+ section_addr(section, addr)); |
4125 |
switch (endian) {
|
4126 |
case DEVICE_LITTLE_ENDIAN:
|
4127 |
val = ldl_le_p(ptr); |
4128 |
break;
|
4129 |
case DEVICE_BIG_ENDIAN:
|
4130 |
val = ldl_be_p(ptr); |
4131 |
break;
|
4132 |
default:
|
4133 |
val = ldl_p(ptr); |
4134 |
break;
|
4135 |
} |
4136 |
} |
4137 |
return val;
|
4138 |
} |
4139 |
|
4140 |
uint32_t ldl_phys(target_phys_addr_t addr) |
4141 |
{ |
4142 |
return ldl_phys_internal(addr, DEVICE_NATIVE_ENDIAN);
|
4143 |
} |
4144 |
|
4145 |
uint32_t ldl_le_phys(target_phys_addr_t addr) |
4146 |
{ |
4147 |
return ldl_phys_internal(addr, DEVICE_LITTLE_ENDIAN);
|
4148 |
} |
4149 |
|
4150 |
uint32_t ldl_be_phys(target_phys_addr_t addr) |
4151 |
{ |
4152 |
return ldl_phys_internal(addr, DEVICE_BIG_ENDIAN);
|
4153 |
} |
4154 |
|
4155 |
/* warning: addr must be aligned */
|
4156 |
static inline uint64_t ldq_phys_internal(target_phys_addr_t addr, |
4157 |
enum device_endian endian)
|
4158 |
{ |
4159 |
uint8_t *ptr; |
4160 |
uint64_t val; |
4161 |
MemoryRegionSection *section; |
4162 |
|
4163 |
section = phys_page_find(addr >> TARGET_PAGE_BITS); |
4164 |
|
4165 |
if (!is_ram_rom_romd(section)) {
|
4166 |
/* I/O case */
|
4167 |
addr = section_addr(section, addr); |
4168 |
|
4169 |
/* XXX This is broken when device endian != cpu endian.
|
4170 |
Fix and add "endian" variable check */
|
4171 |
#ifdef TARGET_WORDS_BIGENDIAN
|
4172 |
val = io_mem_read(section->mr, addr, 4) << 32; |
4173 |
val |= io_mem_read(section->mr, addr + 4, 4); |
4174 |
#else
|
4175 |
val = io_mem_read(section->mr, addr, 4);
|
4176 |
val |= io_mem_read(section->mr, addr + 4, 4) << 32; |
4177 |
#endif
|
4178 |
} else {
|
4179 |
/* RAM case */
|
4180 |
ptr = qemu_get_ram_ptr((memory_region_get_ram_addr(section->mr) |
4181 |
& TARGET_PAGE_MASK) |
4182 |
+ section_addr(section, addr)); |
4183 |
switch (endian) {
|
4184 |
case DEVICE_LITTLE_ENDIAN:
|
4185 |
val = ldq_le_p(ptr); |
4186 |
break;
|
4187 |
case DEVICE_BIG_ENDIAN:
|
4188 |
val = ldq_be_p(ptr); |
4189 |
break;
|
4190 |
default:
|
4191 |
val = ldq_p(ptr); |
4192 |
break;
|
4193 |
} |
4194 |
} |
4195 |
return val;
|
4196 |
} |
4197 |
|
4198 |
uint64_t ldq_phys(target_phys_addr_t addr) |
4199 |
{ |
4200 |
return ldq_phys_internal(addr, DEVICE_NATIVE_ENDIAN);
|
4201 |
} |
4202 |
|
4203 |
uint64_t ldq_le_phys(target_phys_addr_t addr) |
4204 |
{ |
4205 |
return ldq_phys_internal(addr, DEVICE_LITTLE_ENDIAN);
|
4206 |
} |
4207 |
|
4208 |
uint64_t ldq_be_phys(target_phys_addr_t addr) |
4209 |
{ |
4210 |
return ldq_phys_internal(addr, DEVICE_BIG_ENDIAN);
|
4211 |
} |
4212 |
|
4213 |
/* XXX: optimize */
|
4214 |
uint32_t ldub_phys(target_phys_addr_t addr) |
4215 |
{ |
4216 |
uint8_t val; |
4217 |
cpu_physical_memory_read(addr, &val, 1);
|
4218 |
return val;
|
4219 |
} |
4220 |
|
4221 |
/* warning: addr must be aligned */
|
4222 |
static inline uint32_t lduw_phys_internal(target_phys_addr_t addr, |
4223 |
enum device_endian endian)
|
4224 |
{ |
4225 |
uint8_t *ptr; |
4226 |
uint64_t val; |
4227 |
MemoryRegionSection *section; |
4228 |
|
4229 |
section = phys_page_find(addr >> TARGET_PAGE_BITS); |
4230 |
|
4231 |
if (!is_ram_rom_romd(section)) {
|
4232 |
/* I/O case */
|
4233 |
addr = section_addr(section, addr); |
4234 |
val = io_mem_read(section->mr, addr, 2);
|
4235 |
#if defined(TARGET_WORDS_BIGENDIAN)
|
4236 |
if (endian == DEVICE_LITTLE_ENDIAN) {
|
4237 |
val = bswap16(val); |
4238 |
} |
4239 |
#else
|
4240 |
if (endian == DEVICE_BIG_ENDIAN) {
|
4241 |
val = bswap16(val); |
4242 |
} |
4243 |
#endif
|
4244 |
} else {
|
4245 |
/* RAM case */
|
4246 |
ptr = qemu_get_ram_ptr((memory_region_get_ram_addr(section->mr) |
4247 |
& TARGET_PAGE_MASK) |
4248 |
+ section_addr(section, addr)); |
4249 |
switch (endian) {
|
4250 |
case DEVICE_LITTLE_ENDIAN:
|
4251 |
val = lduw_le_p(ptr); |
4252 |
break;
|
4253 |
case DEVICE_BIG_ENDIAN:
|
4254 |
val = lduw_be_p(ptr); |
4255 |
break;
|
4256 |
default:
|
4257 |
val = lduw_p(ptr); |
4258 |
break;
|
4259 |
} |
4260 |
} |
4261 |
return val;
|
4262 |
} |
4263 |
|
4264 |
uint32_t lduw_phys(target_phys_addr_t addr) |
4265 |
{ |
4266 |
return lduw_phys_internal(addr, DEVICE_NATIVE_ENDIAN);
|
4267 |
} |
4268 |
|
4269 |
uint32_t lduw_le_phys(target_phys_addr_t addr) |
4270 |
{ |
4271 |
return lduw_phys_internal(addr, DEVICE_LITTLE_ENDIAN);
|
4272 |
} |
4273 |
|
4274 |
uint32_t lduw_be_phys(target_phys_addr_t addr) |
4275 |
{ |
4276 |
return lduw_phys_internal(addr, DEVICE_BIG_ENDIAN);
|
4277 |
} |
4278 |
|
4279 |
/* warning: addr must be aligned. The ram page is not masked as dirty
|
4280 |
and the code inside is not invalidated. It is useful if the dirty
|
4281 |
bits are used to track modified PTEs */
|
4282 |
void stl_phys_notdirty(target_phys_addr_t addr, uint32_t val)
|
4283 |
{ |
4284 |
uint8_t *ptr; |
4285 |
MemoryRegionSection *section; |
4286 |
|
4287 |
section = phys_page_find(addr >> TARGET_PAGE_BITS); |
4288 |
|
4289 |
if (!memory_region_is_ram(section->mr) || section->readonly) {
|
4290 |
addr = section_addr(section, addr); |
4291 |
if (memory_region_is_ram(section->mr)) {
|
4292 |
section = &phys_sections[phys_section_rom]; |
4293 |
} |
4294 |
io_mem_write(section->mr, addr, val, 4);
|
4295 |
} else {
|
4296 |
unsigned long addr1 = (memory_region_get_ram_addr(section->mr) |
4297 |
& TARGET_PAGE_MASK) |
4298 |
+ section_addr(section, addr); |
4299 |
ptr = qemu_get_ram_ptr(addr1); |
4300 |
stl_p(ptr, val); |
4301 |
|
4302 |
if (unlikely(in_migration)) {
|
4303 |
if (!cpu_physical_memory_is_dirty(addr1)) {
|
4304 |
/* invalidate code */
|
4305 |
tb_invalidate_phys_page_range(addr1, addr1 + 4, 0); |
4306 |
/* set dirty bit */
|
4307 |
cpu_physical_memory_set_dirty_flags( |
4308 |
addr1, (0xff & ~CODE_DIRTY_FLAG));
|
4309 |
} |
4310 |
} |
4311 |
} |
4312 |
} |
4313 |
|
4314 |
void stq_phys_notdirty(target_phys_addr_t addr, uint64_t val)
|
4315 |
{ |
4316 |
uint8_t *ptr; |
4317 |
MemoryRegionSection *section; |
4318 |
|
4319 |
section = phys_page_find(addr >> TARGET_PAGE_BITS); |
4320 |
|
4321 |
if (!memory_region_is_ram(section->mr) || section->readonly) {
|
4322 |
addr = section_addr(section, addr); |
4323 |
if (memory_region_is_ram(section->mr)) {
|
4324 |
section = &phys_sections[phys_section_rom]; |
4325 |
} |
4326 |
#ifdef TARGET_WORDS_BIGENDIAN
|
4327 |
io_mem_write(section->mr, addr, val >> 32, 4); |
4328 |
io_mem_write(section->mr, addr + 4, (uint32_t)val, 4); |
4329 |
#else
|
4330 |
io_mem_write(section->mr, addr, (uint32_t)val, 4);
|
4331 |
io_mem_write(section->mr, addr + 4, val >> 32, 4); |
4332 |
#endif
|
4333 |
} else {
|
4334 |
ptr = qemu_get_ram_ptr((memory_region_get_ram_addr(section->mr) |
4335 |
& TARGET_PAGE_MASK) |
4336 |
+ section_addr(section, addr)); |
4337 |
stq_p(ptr, val); |
4338 |
} |
4339 |
} |
4340 |
|
4341 |
/* warning: addr must be aligned */
|
4342 |
static inline void stl_phys_internal(target_phys_addr_t addr, uint32_t val, |
4343 |
enum device_endian endian)
|
4344 |
{ |
4345 |
uint8_t *ptr; |
4346 |
MemoryRegionSection *section; |
4347 |
|
4348 |
section = phys_page_find(addr >> TARGET_PAGE_BITS); |
4349 |
|
4350 |
if (!memory_region_is_ram(section->mr) || section->readonly) {
|
4351 |
addr = section_addr(section, addr); |
4352 |
if (memory_region_is_ram(section->mr)) {
|
4353 |
section = &phys_sections[phys_section_rom]; |
4354 |
} |
4355 |
#if defined(TARGET_WORDS_BIGENDIAN)
|
4356 |
if (endian == DEVICE_LITTLE_ENDIAN) {
|
4357 |
val = bswap32(val); |
4358 |
} |
4359 |
#else
|
4360 |
if (endian == DEVICE_BIG_ENDIAN) {
|
4361 |
val = bswap32(val); |
4362 |
} |
4363 |
#endif
|
4364 |
io_mem_write(section->mr, addr, val, 4);
|
4365 |
} else {
|
4366 |
unsigned long addr1; |
4367 |
addr1 = (memory_region_get_ram_addr(section->mr) & TARGET_PAGE_MASK) |
4368 |
+ section_addr(section, addr); |
4369 |
/* RAM case */
|
4370 |
ptr = qemu_get_ram_ptr(addr1); |
4371 |
switch (endian) {
|
4372 |
case DEVICE_LITTLE_ENDIAN:
|
4373 |
stl_le_p(ptr, val); |
4374 |
break;
|
4375 |
case DEVICE_BIG_ENDIAN:
|
4376 |
stl_be_p(ptr, val); |
4377 |
break;
|
4378 |
default:
|
4379 |
stl_p(ptr, val); |
4380 |
break;
|
4381 |
} |
4382 |
if (!cpu_physical_memory_is_dirty(addr1)) {
|
4383 |
/* invalidate code */
|
4384 |
tb_invalidate_phys_page_range(addr1, addr1 + 4, 0); |
4385 |
/* set dirty bit */
|
4386 |
cpu_physical_memory_set_dirty_flags(addr1, |
4387 |
(0xff & ~CODE_DIRTY_FLAG));
|
4388 |
} |
4389 |
} |
4390 |
} |
4391 |
|
4392 |
void stl_phys(target_phys_addr_t addr, uint32_t val)
|
4393 |
{ |
4394 |
stl_phys_internal(addr, val, DEVICE_NATIVE_ENDIAN); |
4395 |
} |
4396 |
|
4397 |
void stl_le_phys(target_phys_addr_t addr, uint32_t val)
|
4398 |
{ |
4399 |
stl_phys_internal(addr, val, DEVICE_LITTLE_ENDIAN); |
4400 |
} |
4401 |
|
4402 |
void stl_be_phys(target_phys_addr_t addr, uint32_t val)
|
4403 |
{ |
4404 |
stl_phys_internal(addr, val, DEVICE_BIG_ENDIAN); |
4405 |
} |
4406 |
|
4407 |
/* XXX: optimize */
|
4408 |
void stb_phys(target_phys_addr_t addr, uint32_t val)
|
4409 |
{ |
4410 |
uint8_t v = val; |
4411 |
cpu_physical_memory_write(addr, &v, 1);
|
4412 |
} |
4413 |
|
4414 |
/* warning: addr must be aligned */
|
4415 |
static inline void stw_phys_internal(target_phys_addr_t addr, uint32_t val, |
4416 |
enum device_endian endian)
|
4417 |
{ |
4418 |
uint8_t *ptr; |
4419 |
MemoryRegionSection *section; |
4420 |
|
4421 |
section = phys_page_find(addr >> TARGET_PAGE_BITS); |
4422 |
|
4423 |
if (!memory_region_is_ram(section->mr) || section->readonly) {
|
4424 |
addr = section_addr(section, addr); |
4425 |
if (memory_region_is_ram(section->mr)) {
|
4426 |
section = &phys_sections[phys_section_rom]; |
4427 |
} |
4428 |
#if defined(TARGET_WORDS_BIGENDIAN)
|
4429 |
if (endian == DEVICE_LITTLE_ENDIAN) {
|
4430 |
val = bswap16(val); |
4431 |
} |
4432 |
#else
|
4433 |
if (endian == DEVICE_BIG_ENDIAN) {
|
4434 |
val = bswap16(val); |
4435 |
} |
4436 |
#endif
|
4437 |
io_mem_write(section->mr, addr, val, 2);
|
4438 |
} else {
|
4439 |
unsigned long addr1; |
4440 |
addr1 = (memory_region_get_ram_addr(section->mr) & TARGET_PAGE_MASK) |
4441 |
+ section_addr(section, addr); |
4442 |
/* RAM case */
|
4443 |
ptr = qemu_get_ram_ptr(addr1); |
4444 |
switch (endian) {
|
4445 |
case DEVICE_LITTLE_ENDIAN:
|
4446 |
stw_le_p(ptr, val); |
4447 |
break;
|
4448 |
case DEVICE_BIG_ENDIAN:
|
4449 |
stw_be_p(ptr, val); |
4450 |
break;
|
4451 |
default:
|
4452 |
stw_p(ptr, val); |
4453 |
break;
|
4454 |
} |
4455 |
if (!cpu_physical_memory_is_dirty(addr1)) {
|
4456 |
/* invalidate code */
|
4457 |
tb_invalidate_phys_page_range(addr1, addr1 + 2, 0); |
4458 |
/* set dirty bit */
|
4459 |
cpu_physical_memory_set_dirty_flags(addr1, |
4460 |
(0xff & ~CODE_DIRTY_FLAG));
|
4461 |
} |
4462 |
} |
4463 |
} |
4464 |
|
4465 |
void stw_phys(target_phys_addr_t addr, uint32_t val)
|
4466 |
{ |
4467 |
stw_phys_internal(addr, val, DEVICE_NATIVE_ENDIAN); |
4468 |
} |
4469 |
|
4470 |
void stw_le_phys(target_phys_addr_t addr, uint32_t val)
|
4471 |
{ |
4472 |
stw_phys_internal(addr, val, DEVICE_LITTLE_ENDIAN); |
4473 |
} |
4474 |
|
4475 |
void stw_be_phys(target_phys_addr_t addr, uint32_t val)
|
4476 |
{ |
4477 |
stw_phys_internal(addr, val, DEVICE_BIG_ENDIAN); |
4478 |
} |
4479 |
|
4480 |
/* XXX: optimize */
|
4481 |
void stq_phys(target_phys_addr_t addr, uint64_t val)
|
4482 |
{ |
4483 |
val = tswap64(val); |
4484 |
cpu_physical_memory_write(addr, &val, 8);
|
4485 |
} |
4486 |
|
4487 |
void stq_le_phys(target_phys_addr_t addr, uint64_t val)
|
4488 |
{ |
4489 |
val = cpu_to_le64(val); |
4490 |
cpu_physical_memory_write(addr, &val, 8);
|
4491 |
} |
4492 |
|
4493 |
void stq_be_phys(target_phys_addr_t addr, uint64_t val)
|
4494 |
{ |
4495 |
val = cpu_to_be64(val); |
4496 |
cpu_physical_memory_write(addr, &val, 8);
|
4497 |
} |
4498 |
|
4499 |
/* virtual memory access for debug (includes writing to ROM) */
|
4500 |
int cpu_memory_rw_debug(CPUState *env, target_ulong addr,
|
4501 |
uint8_t *buf, int len, int is_write) |
4502 |
{ |
4503 |
int l;
|
4504 |
target_phys_addr_t phys_addr; |
4505 |
target_ulong page; |
4506 |
|
4507 |
while (len > 0) { |
4508 |
page = addr & TARGET_PAGE_MASK; |
4509 |
phys_addr = cpu_get_phys_page_debug(env, page); |
4510 |
/* if no physical page mapped, return an error */
|
4511 |
if (phys_addr == -1) |
4512 |
return -1; |
4513 |
l = (page + TARGET_PAGE_SIZE) - addr; |
4514 |
if (l > len)
|
4515 |
l = len; |
4516 |
phys_addr += (addr & ~TARGET_PAGE_MASK); |
4517 |
if (is_write)
|
4518 |
cpu_physical_memory_write_rom(phys_addr, buf, l); |
4519 |
else
|
4520 |
cpu_physical_memory_rw(phys_addr, buf, l, is_write); |
4521 |
len -= l; |
4522 |
buf += l; |
4523 |
addr += l; |
4524 |
} |
4525 |
return 0; |
4526 |
} |
4527 |
#endif
|
4528 |
|
4529 |
/* in deterministic execution mode, instructions doing device I/Os
|
4530 |
must be at the end of the TB */
|
4531 |
void cpu_io_recompile(CPUState *env, void *retaddr) |
4532 |
{ |
4533 |
TranslationBlock *tb; |
4534 |
uint32_t n, cflags; |
4535 |
target_ulong pc, cs_base; |
4536 |
uint64_t flags; |
4537 |
|
4538 |
tb = tb_find_pc((unsigned long)retaddr); |
4539 |
if (!tb) {
|
4540 |
cpu_abort(env, "cpu_io_recompile: could not find TB for pc=%p",
|
4541 |
retaddr); |
4542 |
} |
4543 |
n = env->icount_decr.u16.low + tb->icount; |
4544 |
cpu_restore_state(tb, env, (unsigned long)retaddr); |
4545 |
/* Calculate how many instructions had been executed before the fault
|
4546 |
occurred. */
|
4547 |
n = n - env->icount_decr.u16.low; |
4548 |
/* Generate a new TB ending on the I/O insn. */
|
4549 |
n++; |
4550 |
/* On MIPS and SH, delay slot instructions can only be restarted if
|
4551 |
they were already the first instruction in the TB. If this is not
|
4552 |
the first instruction in a TB then re-execute the preceding
|
4553 |
branch. */
|
4554 |
#if defined(TARGET_MIPS)
|
4555 |
if ((env->hflags & MIPS_HFLAG_BMASK) != 0 && n > 1) { |
4556 |
env->active_tc.PC -= 4;
|
4557 |
env->icount_decr.u16.low++; |
4558 |
env->hflags &= ~MIPS_HFLAG_BMASK; |
4559 |
} |
4560 |
#elif defined(TARGET_SH4)
|
4561 |
if ((env->flags & ((DELAY_SLOT | DELAY_SLOT_CONDITIONAL))) != 0 |
4562 |
&& n > 1) {
|
4563 |
env->pc -= 2;
|
4564 |
env->icount_decr.u16.low++; |
4565 |
env->flags &= ~(DELAY_SLOT | DELAY_SLOT_CONDITIONAL); |
4566 |
} |
4567 |
#endif
|
4568 |
/* This should never happen. */
|
4569 |
if (n > CF_COUNT_MASK)
|
4570 |
cpu_abort(env, "TB too big during recompile");
|
4571 |
|
4572 |
cflags = n | CF_LAST_IO; |
4573 |
pc = tb->pc; |
4574 |
cs_base = tb->cs_base; |
4575 |
flags = tb->flags; |
4576 |
tb_phys_invalidate(tb, -1);
|
4577 |
/* FIXME: In theory this could raise an exception. In practice
|
4578 |
we have already translated the block once so it's probably ok. */
|
4579 |
tb_gen_code(env, pc, cs_base, flags, cflags); |
4580 |
/* TODO: If env->pc != tb->pc (i.e. the faulting instruction was not
|
4581 |
the first in the TB) then we end up generating a whole new TB and
|
4582 |
repeating the fault, which is horribly inefficient.
|
4583 |
Better would be to execute just this insn uncached, or generate a
|
4584 |
second new TB. */
|
4585 |
cpu_resume_from_signal(env, NULL);
|
4586 |
} |
4587 |
|
4588 |
#if !defined(CONFIG_USER_ONLY)
|
4589 |
|
4590 |
void dump_exec_info(FILE *f, fprintf_function cpu_fprintf)
|
4591 |
{ |
4592 |
int i, target_code_size, max_target_code_size;
|
4593 |
int direct_jmp_count, direct_jmp2_count, cross_page;
|
4594 |
TranslationBlock *tb; |
4595 |
|
4596 |
target_code_size = 0;
|
4597 |
max_target_code_size = 0;
|
4598 |
cross_page = 0;
|
4599 |
direct_jmp_count = 0;
|
4600 |
direct_jmp2_count = 0;
|
4601 |
for(i = 0; i < nb_tbs; i++) { |
4602 |
tb = &tbs[i]; |
4603 |
target_code_size += tb->size; |
4604 |
if (tb->size > max_target_code_size)
|
4605 |
max_target_code_size = tb->size; |
4606 |
if (tb->page_addr[1] != -1) |
4607 |
cross_page++; |
4608 |
if (tb->tb_next_offset[0] != 0xffff) { |
4609 |
direct_jmp_count++; |
4610 |
if (tb->tb_next_offset[1] != 0xffff) { |
4611 |
direct_jmp2_count++; |
4612 |
} |
4613 |
} |
4614 |
} |
4615 |
/* XXX: avoid using doubles ? */
|
4616 |
cpu_fprintf(f, "Translation buffer state:\n");
|
4617 |
cpu_fprintf(f, "gen code size %td/%ld\n",
|
4618 |
code_gen_ptr - code_gen_buffer, code_gen_buffer_max_size); |
4619 |
cpu_fprintf(f, "TB count %d/%d\n",
|
4620 |
nb_tbs, code_gen_max_blocks); |
4621 |
cpu_fprintf(f, "TB avg target size %d max=%d bytes\n",
|
4622 |
nb_tbs ? target_code_size / nb_tbs : 0,
|
4623 |
max_target_code_size); |
4624 |
cpu_fprintf(f, "TB avg host size %td bytes (expansion ratio: %0.1f)\n",
|
4625 |
nb_tbs ? (code_gen_ptr - code_gen_buffer) / nb_tbs : 0,
|
4626 |
target_code_size ? (double) (code_gen_ptr - code_gen_buffer) / target_code_size : 0); |
4627 |
cpu_fprintf(f, "cross page TB count %d (%d%%)\n",
|
4628 |
cross_page, |
4629 |
nb_tbs ? (cross_page * 100) / nb_tbs : 0); |
4630 |
cpu_fprintf(f, "direct jump count %d (%d%%) (2 jumps=%d %d%%)\n",
|
4631 |
direct_jmp_count, |
4632 |
nb_tbs ? (direct_jmp_count * 100) / nb_tbs : 0, |
4633 |
direct_jmp2_count, |
4634 |
nb_tbs ? (direct_jmp2_count * 100) / nb_tbs : 0); |
4635 |
cpu_fprintf(f, "\nStatistics:\n");
|
4636 |
cpu_fprintf(f, "TB flush count %d\n", tb_flush_count);
|
4637 |
cpu_fprintf(f, "TB invalidate count %d\n", tb_phys_invalidate_count);
|
4638 |
cpu_fprintf(f, "TLB flush count %d\n", tlb_flush_count);
|
4639 |
tcg_dump_info(f, cpu_fprintf); |
4640 |
} |
4641 |
|
4642 |
/* NOTE: this function can trigger an exception */
|
4643 |
/* NOTE2: the returned address is not exactly the physical address: it
|
4644 |
is the offset relative to phys_ram_base */
|
4645 |
tb_page_addr_t get_page_addr_code(CPUState *env1, target_ulong addr) |
4646 |
{ |
4647 |
int mmu_idx, page_index, pd;
|
4648 |
void *p;
|
4649 |
MemoryRegion *mr; |
4650 |
|
4651 |
page_index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
|
4652 |
mmu_idx = cpu_mmu_index(env1); |
4653 |
if (unlikely(env1->tlb_table[mmu_idx][page_index].addr_code !=
|
4654 |
(addr & TARGET_PAGE_MASK))) { |
4655 |
ldub_code(addr); |
4656 |
} |
4657 |
pd = env1->iotlb[mmu_idx][page_index] & ~TARGET_PAGE_MASK; |
4658 |
mr = iotlb_to_region(pd); |
4659 |
if (mr != &io_mem_ram && mr != &io_mem_rom
|
4660 |
&& mr != &io_mem_notdirty && !mr->rom_device) { |
4661 |
#if defined(TARGET_ALPHA) || defined(TARGET_MIPS) || defined(TARGET_SPARC)
|
4662 |
cpu_unassigned_access(env1, addr, 0, 1, 0, 4); |
4663 |
#else
|
4664 |
cpu_abort(env1, "Trying to execute code outside RAM or ROM at 0x" TARGET_FMT_lx "\n", addr); |
4665 |
#endif
|
4666 |
} |
4667 |
p = (void *)((uintptr_t)addr + env1->tlb_table[mmu_idx][page_index].addend);
|
4668 |
return qemu_ram_addr_from_host_nofail(p);
|
4669 |
} |
4670 |
|
4671 |
/*
|
4672 |
* A helper function for the _utterly broken_ virtio device model to find out if
|
4673 |
* it's running on a big endian machine. Don't do this at home kids!
|
4674 |
*/
|
4675 |
bool virtio_is_big_endian(void); |
4676 |
bool virtio_is_big_endian(void) |
4677 |
{ |
4678 |
#if defined(TARGET_WORDS_BIGENDIAN)
|
4679 |
return true; |
4680 |
#else
|
4681 |
return false; |
4682 |
#endif
|
4683 |
} |
4684 |
|
4685 |
#define MMUSUFFIX _cmmu
|
4686 |
#undef GETPC
|
4687 |
#define GETPC() NULL |
4688 |
#define env cpu_single_env
|
4689 |
#define SOFTMMU_CODE_ACCESS
|
4690 |
|
4691 |
#define SHIFT 0 |
4692 |
#include "softmmu_template.h" |
4693 |
|
4694 |
#define SHIFT 1 |
4695 |
#include "softmmu_template.h" |
4696 |
|
4697 |
#define SHIFT 2 |
4698 |
#include "softmmu_template.h" |
4699 |
|
4700 |
#define SHIFT 3 |
4701 |
#include "softmmu_template.h" |
4702 |
|
4703 |
#undef env
|
4704 |
|
4705 |
#endif
|