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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 <stdlib.h> |
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#include <stdio.h> |
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#include <stdarg.h> |
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#include <string.h> |
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#include <errno.h> |
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#include <unistd.h> |
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#include <inttypes.h> |
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#include "cpu.h" |
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#include "exec-all.h" |
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#include "qemu-common.h" |
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#include "tcg.h" |
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#include "hw/hw.h" |
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#include "osdep.h" |
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#include "kvm.h" |
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#if defined(CONFIG_USER_ONLY)
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#include <qemu.h> |
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#include <signal.h> |
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#endif
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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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//#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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|
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#define SMC_BITMAP_USE_THRESHOLD 10 |
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#if defined(TARGET_SPARC64)
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#define TARGET_PHYS_ADDR_SPACE_BITS 41 |
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#elif defined(TARGET_SPARC)
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#define TARGET_PHYS_ADDR_SPACE_BITS 36 |
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#elif defined(TARGET_ALPHA)
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#define TARGET_PHYS_ADDR_SPACE_BITS 42 |
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#define TARGET_VIRT_ADDR_SPACE_BITS 42 |
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#elif defined(TARGET_PPC64)
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#define TARGET_PHYS_ADDR_SPACE_BITS 42 |
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#elif defined(TARGET_X86_64)
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#define TARGET_PHYS_ADDR_SPACE_BITS 42 |
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#elif defined(TARGET_I386)
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#define TARGET_PHYS_ADDR_SPACE_BITS 36 |
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#else
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#define TARGET_PHYS_ADDR_SPACE_BITS 32 |
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#endif
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static TranslationBlock *tbs;
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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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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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uint8_t *phys_ram_dirty; |
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static int in_migration; |
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typedef struct RAMBlock { |
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uint8_t *host; |
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ram_addr_t offset; |
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ram_addr_t length; |
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struct RAMBlock *next;
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} RAMBlock; |
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static RAMBlock *ram_blocks;
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/* TODO: When we implement (and use) ram deallocation (e.g. for hotplug)
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then we can no longer assume contiguous ram offsets, and external uses
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of this variable will break. */
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ram_addr_t last_ram_offset; |
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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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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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/* Current instruction counter. While executing translated code this may
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include some instructions that have not yet been executed. */
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int64_t qemu_icount; |
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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; |
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typedef struct PhysPageDesc { |
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/* offset in host memory of the page + io_index in the low bits */
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ram_addr_t phys_offset; |
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ram_addr_t region_offset; |
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} PhysPageDesc; |
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#define L2_BITS 10 |
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#if defined(CONFIG_USER_ONLY) && defined(TARGET_VIRT_ADDR_SPACE_BITS)
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/* XXX: this is a temporary hack for alpha target.
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* In the future, this is to be replaced by a multi-level table
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* to actually be able to handle the complete 64 bits address space.
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*/
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#define L1_BITS (TARGET_VIRT_ADDR_SPACE_BITS - L2_BITS - TARGET_PAGE_BITS)
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#else
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#define L1_BITS (32 - L2_BITS - TARGET_PAGE_BITS) |
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#endif
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#define L1_SIZE (1 << L1_BITS) |
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#define L2_SIZE (1 << L2_BITS) |
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unsigned long qemu_real_host_page_size; |
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unsigned long qemu_host_page_bits; |
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unsigned long qemu_host_page_size; |
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unsigned long qemu_host_page_mask; |
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/* XXX: for system emulation, it could just be an array */
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static PageDesc *l1_map[L1_SIZE];
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static PhysPageDesc **l1_phys_map;
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#if !defined(CONFIG_USER_ONLY)
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static void io_mem_init(void); |
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/* io memory support */
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CPUWriteMemoryFunc *io_mem_write[IO_MEM_NB_ENTRIES][4];
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CPUReadMemoryFunc *io_mem_read[IO_MEM_NB_ENTRIES][4];
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void *io_mem_opaque[IO_MEM_NB_ENTRIES];
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static char io_mem_used[IO_MEM_NB_ENTRIES]; |
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static int 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; |
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int loglevel;
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static int log_append = 0; |
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/* statistics */
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static int tlb_flush_count; |
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static int tb_flush_count; |
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static int tb_phys_invalidate_count; |
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#define SUBPAGE_IDX(addr) ((addr) & ~TARGET_PAGE_MASK)
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typedef struct subpage_t { |
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target_phys_addr_t base; |
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CPUReadMemoryFunc * const *mem_read[TARGET_PAGE_SIZE][4]; |
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CPUWriteMemoryFunc * const *mem_write[TARGET_PAGE_SIZE][4]; |
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void *opaque[TARGET_PAGE_SIZE][2][4]; |
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ram_addr_t region_offset[TARGET_PAGE_SIZE][2][4]; |
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} subpage_t; |
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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; |
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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; |
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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); |
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} |
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#endif
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static void page_init(void) |
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{ |
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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; |
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GetSystemInfo(&system_info); |
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qemu_real_host_page_size = system_info.dwPageSize; |
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} |
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#else
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qemu_real_host_page_size = getpagesize(); |
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#endif
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if (qemu_host_page_size == 0) |
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qemu_host_page_size = qemu_real_host_page_size; |
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if (qemu_host_page_size < TARGET_PAGE_SIZE)
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qemu_host_page_size = TARGET_PAGE_SIZE; |
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qemu_host_page_bits = 0;
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while ((1 << qemu_host_page_bits) < qemu_host_page_size) |
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qemu_host_page_bits++; |
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qemu_host_page_mask = ~(qemu_host_page_size - 1);
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l1_phys_map = qemu_vmalloc(L1_SIZE * sizeof(void *)); |
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memset(l1_phys_map, 0, L1_SIZE * sizeof(void *)); |
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#if !defined(_WIN32) && defined(CONFIG_USER_ONLY)
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{ |
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long long startaddr, endaddr; |
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FILE *f; |
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int n;
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mmap_lock(); |
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last_brk = (unsigned long)sbrk(0); |
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f = fopen("/proc/self/maps", "r"); |
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if (f) {
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do {
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n = fscanf (f, "%llx-%llx %*[^\n]\n", &startaddr, &endaddr);
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if (n == 2) { |
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startaddr = MIN(startaddr, |
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(1ULL << TARGET_PHYS_ADDR_SPACE_BITS) - 1); |
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endaddr = MIN(endaddr, |
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(1ULL << TARGET_PHYS_ADDR_SPACE_BITS) - 1); |
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page_set_flags(startaddr & TARGET_PAGE_MASK, |
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TARGET_PAGE_ALIGN(endaddr), |
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PAGE_RESERVED); |
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} |
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} while (!feof(f));
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fclose(f); |
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} |
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mmap_unlock(); |
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} |
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#endif
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} |
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static inline PageDesc **page_l1_map(target_ulong index) |
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{ |
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#if TARGET_LONG_BITS > 32 |
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/* Host memory outside guest VM. For 32-bit targets we have already
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excluded high addresses. */
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if (index > ((target_ulong)L2_SIZE * L1_SIZE))
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return NULL; |
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#endif
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return &l1_map[index >> L2_BITS];
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} |
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static inline PageDesc *page_find_alloc(target_ulong index) |
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{ |
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PageDesc **lp, *p; |
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lp = page_l1_map(index); |
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if (!lp)
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return NULL; |
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p = *lp; |
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if (!p) {
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/* allocate if not found */
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#if defined(CONFIG_USER_ONLY)
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size_t len = sizeof(PageDesc) * L2_SIZE;
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/* Don't use qemu_malloc because it may recurse. */
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p = mmap(NULL, len, PROT_READ | PROT_WRITE,
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MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); |
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*lp = p; |
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if (h2g_valid(p)) {
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unsigned long addr = h2g(p); |
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page_set_flags(addr & TARGET_PAGE_MASK, |
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TARGET_PAGE_ALIGN(addr + len), |
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PAGE_RESERVED); |
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} |
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#else
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p = qemu_mallocz(sizeof(PageDesc) * L2_SIZE);
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*lp = p; |
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#endif
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} |
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return p + (index & (L2_SIZE - 1)); |
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} |
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static inline PageDesc *page_find(target_ulong index) |
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{ |
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PageDesc **lp, *p; |
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lp = page_l1_map(index); |
344 |
if (!lp)
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return NULL; |
346 |
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p = *lp; |
348 |
if (!p) {
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return NULL; |
350 |
} |
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return p + (index & (L2_SIZE - 1)); |
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} |
353 |
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static PhysPageDesc *phys_page_find_alloc(target_phys_addr_t index, int alloc) |
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{ |
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void **lp, **p;
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PhysPageDesc *pd; |
358 |
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p = (void **)l1_phys_map;
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#if TARGET_PHYS_ADDR_SPACE_BITS > 32 |
361 |
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#if TARGET_PHYS_ADDR_SPACE_BITS > (32 + L1_BITS) |
363 |
#error unsupported TARGET_PHYS_ADDR_SPACE_BITS
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#endif
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lp = p + ((index >> (L1_BITS + L2_BITS)) & (L1_SIZE - 1));
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p = *lp; |
367 |
if (!p) {
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/* allocate if not found */
|
369 |
if (!alloc)
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return NULL; |
371 |
p = qemu_vmalloc(sizeof(void *) * L1_SIZE); |
372 |
memset(p, 0, sizeof(void *) * L1_SIZE); |
373 |
*lp = p; |
374 |
} |
375 |
#endif
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lp = p + ((index >> L2_BITS) & (L1_SIZE - 1));
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pd = *lp; |
378 |
if (!pd) {
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int i;
|
380 |
/* allocate if not found */
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381 |
if (!alloc)
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return NULL; |
383 |
pd = qemu_vmalloc(sizeof(PhysPageDesc) * L2_SIZE);
|
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*lp = pd; |
385 |
for (i = 0; i < L2_SIZE; i++) { |
386 |
pd[i].phys_offset = IO_MEM_UNASSIGNED; |
387 |
pd[i].region_offset = (index + i) << TARGET_PAGE_BITS; |
388 |
} |
389 |
} |
390 |
return ((PhysPageDesc *)pd) + (index & (L2_SIZE - 1)); |
391 |
} |
392 |
|
393 |
static inline PhysPageDesc *phys_page_find(target_phys_addr_t index) |
394 |
{ |
395 |
return phys_page_find_alloc(index, 0); |
396 |
} |
397 |
|
398 |
#if !defined(CONFIG_USER_ONLY)
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399 |
static void tlb_protect_code(ram_addr_t ram_addr); |
400 |
static void tlb_unprotect_code_phys(CPUState *env, ram_addr_t ram_addr, |
401 |
target_ulong vaddr); |
402 |
#define mmap_lock() do { } while(0) |
403 |
#define mmap_unlock() do { } while(0) |
404 |
#endif
|
405 |
|
406 |
#define DEFAULT_CODE_GEN_BUFFER_SIZE (32 * 1024 * 1024) |
407 |
|
408 |
#if defined(CONFIG_USER_ONLY)
|
409 |
/* Currently it is not recommended to allocate big chunks of data in
|
410 |
user mode. It will change when a dedicated libc will be used */
|
411 |
#define USE_STATIC_CODE_GEN_BUFFER
|
412 |
#endif
|
413 |
|
414 |
#ifdef USE_STATIC_CODE_GEN_BUFFER
|
415 |
static uint8_t static_code_gen_buffer[DEFAULT_CODE_GEN_BUFFER_SIZE];
|
416 |
#endif
|
417 |
|
418 |
static void code_gen_alloc(unsigned long tb_size) |
419 |
{ |
420 |
#ifdef USE_STATIC_CODE_GEN_BUFFER
|
421 |
code_gen_buffer = static_code_gen_buffer; |
422 |
code_gen_buffer_size = DEFAULT_CODE_GEN_BUFFER_SIZE; |
423 |
map_exec(code_gen_buffer, code_gen_buffer_size); |
424 |
#else
|
425 |
code_gen_buffer_size = tb_size; |
426 |
if (code_gen_buffer_size == 0) { |
427 |
#if defined(CONFIG_USER_ONLY)
|
428 |
/* in user mode, phys_ram_size is not meaningful */
|
429 |
code_gen_buffer_size = DEFAULT_CODE_GEN_BUFFER_SIZE; |
430 |
#else
|
431 |
/* XXX: needs adjustments */
|
432 |
code_gen_buffer_size = (unsigned long)(ram_size / 4); |
433 |
#endif
|
434 |
} |
435 |
if (code_gen_buffer_size < MIN_CODE_GEN_BUFFER_SIZE)
|
436 |
code_gen_buffer_size = MIN_CODE_GEN_BUFFER_SIZE; |
437 |
/* The code gen buffer location may have constraints depending on
|
438 |
the host cpu and OS */
|
439 |
#if defined(__linux__)
|
440 |
{ |
441 |
int flags;
|
442 |
void *start = NULL; |
443 |
|
444 |
flags = MAP_PRIVATE | MAP_ANONYMOUS; |
445 |
#if defined(__x86_64__)
|
446 |
flags |= MAP_32BIT; |
447 |
/* Cannot map more than that */
|
448 |
if (code_gen_buffer_size > (800 * 1024 * 1024)) |
449 |
code_gen_buffer_size = (800 * 1024 * 1024); |
450 |
#elif defined(__sparc_v9__)
|
451 |
// Map the buffer below 2G, so we can use direct calls and branches
|
452 |
flags |= MAP_FIXED; |
453 |
start = (void *) 0x60000000UL; |
454 |
if (code_gen_buffer_size > (512 * 1024 * 1024)) |
455 |
code_gen_buffer_size = (512 * 1024 * 1024); |
456 |
#elif defined(__arm__)
|
457 |
/* Map the buffer below 32M, so we can use direct calls and branches */
|
458 |
flags |= MAP_FIXED; |
459 |
start = (void *) 0x01000000UL; |
460 |
if (code_gen_buffer_size > 16 * 1024 * 1024) |
461 |
code_gen_buffer_size = 16 * 1024 * 1024; |
462 |
#endif
|
463 |
code_gen_buffer = mmap(start, code_gen_buffer_size, |
464 |
PROT_WRITE | PROT_READ | PROT_EXEC, |
465 |
flags, -1, 0); |
466 |
if (code_gen_buffer == MAP_FAILED) {
|
467 |
fprintf(stderr, "Could not allocate dynamic translator buffer\n");
|
468 |
exit(1);
|
469 |
} |
470 |
} |
471 |
#elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__)
|
472 |
{ |
473 |
int flags;
|
474 |
void *addr = NULL; |
475 |
flags = MAP_PRIVATE | MAP_ANONYMOUS; |
476 |
#if defined(__x86_64__)
|
477 |
/* FreeBSD doesn't have MAP_32BIT, use MAP_FIXED and assume
|
478 |
* 0x40000000 is free */
|
479 |
flags |= MAP_FIXED; |
480 |
addr = (void *)0x40000000; |
481 |
/* Cannot map more than that */
|
482 |
if (code_gen_buffer_size > (800 * 1024 * 1024)) |
483 |
code_gen_buffer_size = (800 * 1024 * 1024); |
484 |
#endif
|
485 |
code_gen_buffer = mmap(addr, code_gen_buffer_size, |
486 |
PROT_WRITE | PROT_READ | PROT_EXEC, |
487 |
flags, -1, 0); |
488 |
if (code_gen_buffer == MAP_FAILED) {
|
489 |
fprintf(stderr, "Could not allocate dynamic translator buffer\n");
|
490 |
exit(1);
|
491 |
} |
492 |
} |
493 |
#else
|
494 |
code_gen_buffer = qemu_malloc(code_gen_buffer_size); |
495 |
map_exec(code_gen_buffer, code_gen_buffer_size); |
496 |
#endif
|
497 |
#endif /* !USE_STATIC_CODE_GEN_BUFFER */ |
498 |
map_exec(code_gen_prologue, sizeof(code_gen_prologue));
|
499 |
code_gen_buffer_max_size = code_gen_buffer_size - |
500 |
code_gen_max_block_size(); |
501 |
code_gen_max_blocks = code_gen_buffer_size / CODE_GEN_AVG_BLOCK_SIZE; |
502 |
tbs = qemu_malloc(code_gen_max_blocks * sizeof(TranslationBlock));
|
503 |
} |
504 |
|
505 |
/* Must be called before using the QEMU cpus. 'tb_size' is the size
|
506 |
(in bytes) allocated to the translation buffer. Zero means default
|
507 |
size. */
|
508 |
void cpu_exec_init_all(unsigned long tb_size) |
509 |
{ |
510 |
cpu_gen_init(); |
511 |
code_gen_alloc(tb_size); |
512 |
code_gen_ptr = code_gen_buffer; |
513 |
page_init(); |
514 |
#if !defined(CONFIG_USER_ONLY)
|
515 |
io_mem_init(); |
516 |
#endif
|
517 |
} |
518 |
|
519 |
#if defined(CPU_SAVE_VERSION) && !defined(CONFIG_USER_ONLY)
|
520 |
|
521 |
static void cpu_common_pre_save(void *opaque) |
522 |
{ |
523 |
CPUState *env = opaque; |
524 |
|
525 |
cpu_synchronize_state(env); |
526 |
} |
527 |
|
528 |
static int cpu_common_pre_load(void *opaque) |
529 |
{ |
530 |
CPUState *env = opaque; |
531 |
|
532 |
cpu_synchronize_state(env); |
533 |
return 0; |
534 |
} |
535 |
|
536 |
static int cpu_common_post_load(void *opaque, int version_id) |
537 |
{ |
538 |
CPUState *env = opaque; |
539 |
|
540 |
/* 0x01 was CPU_INTERRUPT_EXIT. This line can be removed when the
|
541 |
version_id is increased. */
|
542 |
env->interrupt_request &= ~0x01;
|
543 |
tlb_flush(env, 1);
|
544 |
|
545 |
return 0; |
546 |
} |
547 |
|
548 |
static const VMStateDescription vmstate_cpu_common = { |
549 |
.name = "cpu_common",
|
550 |
.version_id = 1,
|
551 |
.minimum_version_id = 1,
|
552 |
.minimum_version_id_old = 1,
|
553 |
.pre_save = cpu_common_pre_save, |
554 |
.pre_load = cpu_common_pre_load, |
555 |
.post_load = cpu_common_post_load, |
556 |
.fields = (VMStateField []) { |
557 |
VMSTATE_UINT32(halted, CPUState), |
558 |
VMSTATE_UINT32(interrupt_request, CPUState), |
559 |
VMSTATE_END_OF_LIST() |
560 |
} |
561 |
}; |
562 |
#endif
|
563 |
|
564 |
CPUState *qemu_get_cpu(int cpu)
|
565 |
{ |
566 |
CPUState *env = first_cpu; |
567 |
|
568 |
while (env) {
|
569 |
if (env->cpu_index == cpu)
|
570 |
break;
|
571 |
env = env->next_cpu; |
572 |
} |
573 |
|
574 |
return env;
|
575 |
} |
576 |
|
577 |
void cpu_exec_init(CPUState *env)
|
578 |
{ |
579 |
CPUState **penv; |
580 |
int cpu_index;
|
581 |
|
582 |
#if defined(CONFIG_USER_ONLY)
|
583 |
cpu_list_lock(); |
584 |
#endif
|
585 |
env->next_cpu = NULL;
|
586 |
penv = &first_cpu; |
587 |
cpu_index = 0;
|
588 |
while (*penv != NULL) { |
589 |
penv = &(*penv)->next_cpu; |
590 |
cpu_index++; |
591 |
} |
592 |
env->cpu_index = cpu_index; |
593 |
env->numa_node = 0;
|
594 |
QTAILQ_INIT(&env->breakpoints); |
595 |
QTAILQ_INIT(&env->watchpoints); |
596 |
*penv = env; |
597 |
#if defined(CONFIG_USER_ONLY)
|
598 |
cpu_list_unlock(); |
599 |
#endif
|
600 |
#if defined(CPU_SAVE_VERSION) && !defined(CONFIG_USER_ONLY)
|
601 |
vmstate_register(cpu_index, &vmstate_cpu_common, env); |
602 |
register_savevm("cpu", cpu_index, CPU_SAVE_VERSION,
|
603 |
cpu_save, cpu_load, env); |
604 |
#endif
|
605 |
} |
606 |
|
607 |
static inline void invalidate_page_bitmap(PageDesc *p) |
608 |
{ |
609 |
if (p->code_bitmap) {
|
610 |
qemu_free(p->code_bitmap); |
611 |
p->code_bitmap = NULL;
|
612 |
} |
613 |
p->code_write_count = 0;
|
614 |
} |
615 |
|
616 |
/* set to NULL all the 'first_tb' fields in all PageDescs */
|
617 |
static void page_flush_tb(void) |
618 |
{ |
619 |
int i, j;
|
620 |
PageDesc *p; |
621 |
|
622 |
for(i = 0; i < L1_SIZE; i++) { |
623 |
p = l1_map[i]; |
624 |
if (p) {
|
625 |
for(j = 0; j < L2_SIZE; j++) { |
626 |
p->first_tb = NULL;
|
627 |
invalidate_page_bitmap(p); |
628 |
p++; |
629 |
} |
630 |
} |
631 |
} |
632 |
} |
633 |
|
634 |
/* flush all the translation blocks */
|
635 |
/* XXX: tb_flush is currently not thread safe */
|
636 |
void tb_flush(CPUState *env1)
|
637 |
{ |
638 |
CPUState *env; |
639 |
#if defined(DEBUG_FLUSH)
|
640 |
printf("qemu: flush code_size=%ld nb_tbs=%d avg_tb_size=%ld\n",
|
641 |
(unsigned long)(code_gen_ptr - code_gen_buffer), |
642 |
nb_tbs, nb_tbs > 0 ?
|
643 |
((unsigned long)(code_gen_ptr - code_gen_buffer)) / nb_tbs : 0); |
644 |
#endif
|
645 |
if ((unsigned long)(code_gen_ptr - code_gen_buffer) > code_gen_buffer_size) |
646 |
cpu_abort(env1, "Internal error: code buffer overflow\n");
|
647 |
|
648 |
nb_tbs = 0;
|
649 |
|
650 |
for(env = first_cpu; env != NULL; env = env->next_cpu) { |
651 |
memset (env->tb_jmp_cache, 0, TB_JMP_CACHE_SIZE * sizeof (void *)); |
652 |
} |
653 |
|
654 |
memset (tb_phys_hash, 0, CODE_GEN_PHYS_HASH_SIZE * sizeof (void *)); |
655 |
page_flush_tb(); |
656 |
|
657 |
code_gen_ptr = code_gen_buffer; |
658 |
/* XXX: flush processor icache at this point if cache flush is
|
659 |
expensive */
|
660 |
tb_flush_count++; |
661 |
} |
662 |
|
663 |
#ifdef DEBUG_TB_CHECK
|
664 |
|
665 |
static void tb_invalidate_check(target_ulong address) |
666 |
{ |
667 |
TranslationBlock *tb; |
668 |
int i;
|
669 |
address &= TARGET_PAGE_MASK; |
670 |
for(i = 0;i < CODE_GEN_PHYS_HASH_SIZE; i++) { |
671 |
for(tb = tb_phys_hash[i]; tb != NULL; tb = tb->phys_hash_next) { |
672 |
if (!(address + TARGET_PAGE_SIZE <= tb->pc ||
|
673 |
address >= tb->pc + tb->size)) { |
674 |
printf("ERROR invalidate: address=" TARGET_FMT_lx
|
675 |
" PC=%08lx size=%04x\n",
|
676 |
address, (long)tb->pc, tb->size);
|
677 |
} |
678 |
} |
679 |
} |
680 |
} |
681 |
|
682 |
/* verify that all the pages have correct rights for code */
|
683 |
static void tb_page_check(void) |
684 |
{ |
685 |
TranslationBlock *tb; |
686 |
int i, flags1, flags2;
|
687 |
|
688 |
for(i = 0;i < CODE_GEN_PHYS_HASH_SIZE; i++) { |
689 |
for(tb = tb_phys_hash[i]; tb != NULL; tb = tb->phys_hash_next) { |
690 |
flags1 = page_get_flags(tb->pc); |
691 |
flags2 = page_get_flags(tb->pc + tb->size - 1);
|
692 |
if ((flags1 & PAGE_WRITE) || (flags2 & PAGE_WRITE)) {
|
693 |
printf("ERROR page flags: PC=%08lx size=%04x f1=%x f2=%x\n",
|
694 |
(long)tb->pc, tb->size, flags1, flags2);
|
695 |
} |
696 |
} |
697 |
} |
698 |
} |
699 |
|
700 |
#endif
|
701 |
|
702 |
/* invalidate one TB */
|
703 |
static inline void tb_remove(TranslationBlock **ptb, TranslationBlock *tb, |
704 |
int next_offset)
|
705 |
{ |
706 |
TranslationBlock *tb1; |
707 |
for(;;) {
|
708 |
tb1 = *ptb; |
709 |
if (tb1 == tb) {
|
710 |
*ptb = *(TranslationBlock **)((char *)tb1 + next_offset);
|
711 |
break;
|
712 |
} |
713 |
ptb = (TranslationBlock **)((char *)tb1 + next_offset);
|
714 |
} |
715 |
} |
716 |
|
717 |
static inline void tb_page_remove(TranslationBlock **ptb, TranslationBlock *tb) |
718 |
{ |
719 |
TranslationBlock *tb1; |
720 |
unsigned int n1; |
721 |
|
722 |
for(;;) {
|
723 |
tb1 = *ptb; |
724 |
n1 = (long)tb1 & 3; |
725 |
tb1 = (TranslationBlock *)((long)tb1 & ~3); |
726 |
if (tb1 == tb) {
|
727 |
*ptb = tb1->page_next[n1]; |
728 |
break;
|
729 |
} |
730 |
ptb = &tb1->page_next[n1]; |
731 |
} |
732 |
} |
733 |
|
734 |
static inline void tb_jmp_remove(TranslationBlock *tb, int n) |
735 |
{ |
736 |
TranslationBlock *tb1, **ptb; |
737 |
unsigned int n1; |
738 |
|
739 |
ptb = &tb->jmp_next[n]; |
740 |
tb1 = *ptb; |
741 |
if (tb1) {
|
742 |
/* find tb(n) in circular list */
|
743 |
for(;;) {
|
744 |
tb1 = *ptb; |
745 |
n1 = (long)tb1 & 3; |
746 |
tb1 = (TranslationBlock *)((long)tb1 & ~3); |
747 |
if (n1 == n && tb1 == tb)
|
748 |
break;
|
749 |
if (n1 == 2) { |
750 |
ptb = &tb1->jmp_first; |
751 |
} else {
|
752 |
ptb = &tb1->jmp_next[n1]; |
753 |
} |
754 |
} |
755 |
/* now we can suppress tb(n) from the list */
|
756 |
*ptb = tb->jmp_next[n]; |
757 |
|
758 |
tb->jmp_next[n] = NULL;
|
759 |
} |
760 |
} |
761 |
|
762 |
/* reset the jump entry 'n' of a TB so that it is not chained to
|
763 |
another TB */
|
764 |
static inline void tb_reset_jump(TranslationBlock *tb, int n) |
765 |
{ |
766 |
tb_set_jmp_target(tb, n, (unsigned long)(tb->tc_ptr + tb->tb_next_offset[n])); |
767 |
} |
768 |
|
769 |
void tb_phys_invalidate(TranslationBlock *tb, target_ulong page_addr)
|
770 |
{ |
771 |
CPUState *env; |
772 |
PageDesc *p; |
773 |
unsigned int h, n1; |
774 |
target_phys_addr_t phys_pc; |
775 |
TranslationBlock *tb1, *tb2; |
776 |
|
777 |
/* remove the TB from the hash list */
|
778 |
phys_pc = tb->page_addr[0] + (tb->pc & ~TARGET_PAGE_MASK);
|
779 |
h = tb_phys_hash_func(phys_pc); |
780 |
tb_remove(&tb_phys_hash[h], tb, |
781 |
offsetof(TranslationBlock, phys_hash_next)); |
782 |
|
783 |
/* remove the TB from the page list */
|
784 |
if (tb->page_addr[0] != page_addr) { |
785 |
p = page_find(tb->page_addr[0] >> TARGET_PAGE_BITS);
|
786 |
tb_page_remove(&p->first_tb, tb); |
787 |
invalidate_page_bitmap(p); |
788 |
} |
789 |
if (tb->page_addr[1] != -1 && tb->page_addr[1] != page_addr) { |
790 |
p = page_find(tb->page_addr[1] >> TARGET_PAGE_BITS);
|
791 |
tb_page_remove(&p->first_tb, tb); |
792 |
invalidate_page_bitmap(p); |
793 |
} |
794 |
|
795 |
tb_invalidated_flag = 1;
|
796 |
|
797 |
/* remove the TB from the hash list */
|
798 |
h = tb_jmp_cache_hash_func(tb->pc); |
799 |
for(env = first_cpu; env != NULL; env = env->next_cpu) { |
800 |
if (env->tb_jmp_cache[h] == tb)
|
801 |
env->tb_jmp_cache[h] = NULL;
|
802 |
} |
803 |
|
804 |
/* suppress this TB from the two jump lists */
|
805 |
tb_jmp_remove(tb, 0);
|
806 |
tb_jmp_remove(tb, 1);
|
807 |
|
808 |
/* suppress any remaining jumps to this TB */
|
809 |
tb1 = tb->jmp_first; |
810 |
for(;;) {
|
811 |
n1 = (long)tb1 & 3; |
812 |
if (n1 == 2) |
813 |
break;
|
814 |
tb1 = (TranslationBlock *)((long)tb1 & ~3); |
815 |
tb2 = tb1->jmp_next[n1]; |
816 |
tb_reset_jump(tb1, n1); |
817 |
tb1->jmp_next[n1] = NULL;
|
818 |
tb1 = tb2; |
819 |
} |
820 |
tb->jmp_first = (TranslationBlock *)((long)tb | 2); /* fail safe */ |
821 |
|
822 |
tb_phys_invalidate_count++; |
823 |
} |
824 |
|
825 |
static inline void set_bits(uint8_t *tab, int start, int len) |
826 |
{ |
827 |
int end, mask, end1;
|
828 |
|
829 |
end = start + len; |
830 |
tab += start >> 3;
|
831 |
mask = 0xff << (start & 7); |
832 |
if ((start & ~7) == (end & ~7)) { |
833 |
if (start < end) {
|
834 |
mask &= ~(0xff << (end & 7)); |
835 |
*tab |= mask; |
836 |
} |
837 |
} else {
|
838 |
*tab++ |= mask; |
839 |
start = (start + 8) & ~7; |
840 |
end1 = end & ~7;
|
841 |
while (start < end1) {
|
842 |
*tab++ = 0xff;
|
843 |
start += 8;
|
844 |
} |
845 |
if (start < end) {
|
846 |
mask = ~(0xff << (end & 7)); |
847 |
*tab |= mask; |
848 |
} |
849 |
} |
850 |
} |
851 |
|
852 |
static void build_page_bitmap(PageDesc *p) |
853 |
{ |
854 |
int n, tb_start, tb_end;
|
855 |
TranslationBlock *tb; |
856 |
|
857 |
p->code_bitmap = qemu_mallocz(TARGET_PAGE_SIZE / 8);
|
858 |
|
859 |
tb = p->first_tb; |
860 |
while (tb != NULL) { |
861 |
n = (long)tb & 3; |
862 |
tb = (TranslationBlock *)((long)tb & ~3); |
863 |
/* NOTE: this is subtle as a TB may span two physical pages */
|
864 |
if (n == 0) { |
865 |
/* NOTE: tb_end may be after the end of the page, but
|
866 |
it is not a problem */
|
867 |
tb_start = tb->pc & ~TARGET_PAGE_MASK; |
868 |
tb_end = tb_start + tb->size; |
869 |
if (tb_end > TARGET_PAGE_SIZE)
|
870 |
tb_end = TARGET_PAGE_SIZE; |
871 |
} else {
|
872 |
tb_start = 0;
|
873 |
tb_end = ((tb->pc + tb->size) & ~TARGET_PAGE_MASK); |
874 |
} |
875 |
set_bits(p->code_bitmap, tb_start, tb_end - tb_start); |
876 |
tb = tb->page_next[n]; |
877 |
} |
878 |
} |
879 |
|
880 |
TranslationBlock *tb_gen_code(CPUState *env, |
881 |
target_ulong pc, target_ulong cs_base, |
882 |
int flags, int cflags) |
883 |
{ |
884 |
TranslationBlock *tb; |
885 |
uint8_t *tc_ptr; |
886 |
target_ulong phys_pc, phys_page2, virt_page2; |
887 |
int code_gen_size;
|
888 |
|
889 |
phys_pc = get_phys_addr_code(env, pc); |
890 |
tb = tb_alloc(pc); |
891 |
if (!tb) {
|
892 |
/* flush must be done */
|
893 |
tb_flush(env); |
894 |
/* cannot fail at this point */
|
895 |
tb = tb_alloc(pc); |
896 |
/* Don't forget to invalidate previous TB info. */
|
897 |
tb_invalidated_flag = 1;
|
898 |
} |
899 |
tc_ptr = code_gen_ptr; |
900 |
tb->tc_ptr = tc_ptr; |
901 |
tb->cs_base = cs_base; |
902 |
tb->flags = flags; |
903 |
tb->cflags = cflags; |
904 |
cpu_gen_code(env, tb, &code_gen_size); |
905 |
code_gen_ptr = (void *)(((unsigned long)code_gen_ptr + code_gen_size + CODE_GEN_ALIGN - 1) & ~(CODE_GEN_ALIGN - 1)); |
906 |
|
907 |
/* check next page if needed */
|
908 |
virt_page2 = (pc + tb->size - 1) & TARGET_PAGE_MASK;
|
909 |
phys_page2 = -1;
|
910 |
if ((pc & TARGET_PAGE_MASK) != virt_page2) {
|
911 |
phys_page2 = get_phys_addr_code(env, virt_page2); |
912 |
} |
913 |
tb_link_phys(tb, phys_pc, phys_page2); |
914 |
return tb;
|
915 |
} |
916 |
|
917 |
/* invalidate all TBs which intersect with the target physical page
|
918 |
starting in range [start;end[. NOTE: start and end must refer to
|
919 |
the same physical page. 'is_cpu_write_access' should be true if called
|
920 |
from a real cpu write access: the virtual CPU will exit the current
|
921 |
TB if code is modified inside this TB. */
|
922 |
void tb_invalidate_phys_page_range(target_phys_addr_t start, target_phys_addr_t end,
|
923 |
int is_cpu_write_access)
|
924 |
{ |
925 |
TranslationBlock *tb, *tb_next, *saved_tb; |
926 |
CPUState *env = cpu_single_env; |
927 |
target_ulong tb_start, tb_end; |
928 |
PageDesc *p; |
929 |
int n;
|
930 |
#ifdef TARGET_HAS_PRECISE_SMC
|
931 |
int current_tb_not_found = is_cpu_write_access;
|
932 |
TranslationBlock *current_tb = NULL;
|
933 |
int current_tb_modified = 0; |
934 |
target_ulong current_pc = 0;
|
935 |
target_ulong current_cs_base = 0;
|
936 |
int current_flags = 0; |
937 |
#endif /* TARGET_HAS_PRECISE_SMC */ |
938 |
|
939 |
p = page_find(start >> TARGET_PAGE_BITS); |
940 |
if (!p)
|
941 |
return;
|
942 |
if (!p->code_bitmap &&
|
943 |
++p->code_write_count >= SMC_BITMAP_USE_THRESHOLD && |
944 |
is_cpu_write_access) { |
945 |
/* build code bitmap */
|
946 |
build_page_bitmap(p); |
947 |
} |
948 |
|
949 |
/* we remove all the TBs in the range [start, end[ */
|
950 |
/* XXX: see if in some cases it could be faster to invalidate all the code */
|
951 |
tb = p->first_tb; |
952 |
while (tb != NULL) { |
953 |
n = (long)tb & 3; |
954 |
tb = (TranslationBlock *)((long)tb & ~3); |
955 |
tb_next = tb->page_next[n]; |
956 |
/* NOTE: this is subtle as a TB may span two physical pages */
|
957 |
if (n == 0) { |
958 |
/* NOTE: tb_end may be after the end of the page, but
|
959 |
it is not a problem */
|
960 |
tb_start = tb->page_addr[0] + (tb->pc & ~TARGET_PAGE_MASK);
|
961 |
tb_end = tb_start + tb->size; |
962 |
} else {
|
963 |
tb_start = tb->page_addr[1];
|
964 |
tb_end = tb_start + ((tb->pc + tb->size) & ~TARGET_PAGE_MASK); |
965 |
} |
966 |
if (!(tb_end <= start || tb_start >= end)) {
|
967 |
#ifdef TARGET_HAS_PRECISE_SMC
|
968 |
if (current_tb_not_found) {
|
969 |
current_tb_not_found = 0;
|
970 |
current_tb = NULL;
|
971 |
if (env->mem_io_pc) {
|
972 |
/* now we have a real cpu fault */
|
973 |
current_tb = tb_find_pc(env->mem_io_pc); |
974 |
} |
975 |
} |
976 |
if (current_tb == tb &&
|
977 |
(current_tb->cflags & CF_COUNT_MASK) != 1) {
|
978 |
/* If we are modifying the current TB, we must stop
|
979 |
its execution. We could be more precise by checking
|
980 |
that the modification is after the current PC, but it
|
981 |
would require a specialized function to partially
|
982 |
restore the CPU state */
|
983 |
|
984 |
current_tb_modified = 1;
|
985 |
cpu_restore_state(current_tb, env, |
986 |
env->mem_io_pc, NULL);
|
987 |
cpu_get_tb_cpu_state(env, ¤t_pc, ¤t_cs_base, |
988 |
¤t_flags); |
989 |
} |
990 |
#endif /* TARGET_HAS_PRECISE_SMC */ |
991 |
/* we need to do that to handle the case where a signal
|
992 |
occurs while doing tb_phys_invalidate() */
|
993 |
saved_tb = NULL;
|
994 |
if (env) {
|
995 |
saved_tb = env->current_tb; |
996 |
env->current_tb = NULL;
|
997 |
} |
998 |
tb_phys_invalidate(tb, -1);
|
999 |
if (env) {
|
1000 |
env->current_tb = saved_tb; |
1001 |
if (env->interrupt_request && env->current_tb)
|
1002 |
cpu_interrupt(env, env->interrupt_request); |
1003 |
} |
1004 |
} |
1005 |
tb = tb_next; |
1006 |
} |
1007 |
#if !defined(CONFIG_USER_ONLY)
|
1008 |
/* if no code remaining, no need to continue to use slow writes */
|
1009 |
if (!p->first_tb) {
|
1010 |
invalidate_page_bitmap(p); |
1011 |
if (is_cpu_write_access) {
|
1012 |
tlb_unprotect_code_phys(env, start, env->mem_io_vaddr); |
1013 |
} |
1014 |
} |
1015 |
#endif
|
1016 |
#ifdef TARGET_HAS_PRECISE_SMC
|
1017 |
if (current_tb_modified) {
|
1018 |
/* we generate a block containing just the instruction
|
1019 |
modifying the memory. It will ensure that it cannot modify
|
1020 |
itself */
|
1021 |
env->current_tb = NULL;
|
1022 |
tb_gen_code(env, current_pc, current_cs_base, current_flags, 1);
|
1023 |
cpu_resume_from_signal(env, NULL);
|
1024 |
} |
1025 |
#endif
|
1026 |
} |
1027 |
|
1028 |
/* len must be <= 8 and start must be a multiple of len */
|
1029 |
static inline void tb_invalidate_phys_page_fast(target_phys_addr_t start, int len) |
1030 |
{ |
1031 |
PageDesc *p; |
1032 |
int offset, b;
|
1033 |
#if 0
|
1034 |
if (1) {
|
1035 |
qemu_log("modifying code at 0x%x size=%d EIP=%x PC=%08x\n",
|
1036 |
cpu_single_env->mem_io_vaddr, len,
|
1037 |
cpu_single_env->eip,
|
1038 |
cpu_single_env->eip + (long)cpu_single_env->segs[R_CS].base);
|
1039 |
}
|
1040 |
#endif
|
1041 |
p = page_find(start >> TARGET_PAGE_BITS); |
1042 |
if (!p)
|
1043 |
return;
|
1044 |
if (p->code_bitmap) {
|
1045 |
offset = start & ~TARGET_PAGE_MASK; |
1046 |
b = p->code_bitmap[offset >> 3] >> (offset & 7); |
1047 |
if (b & ((1 << len) - 1)) |
1048 |
goto do_invalidate;
|
1049 |
} else {
|
1050 |
do_invalidate:
|
1051 |
tb_invalidate_phys_page_range(start, start + len, 1);
|
1052 |
} |
1053 |
} |
1054 |
|
1055 |
#if !defined(CONFIG_SOFTMMU)
|
1056 |
static void tb_invalidate_phys_page(target_phys_addr_t addr, |
1057 |
unsigned long pc, void *puc) |
1058 |
{ |
1059 |
TranslationBlock *tb; |
1060 |
PageDesc *p; |
1061 |
int n;
|
1062 |
#ifdef TARGET_HAS_PRECISE_SMC
|
1063 |
TranslationBlock *current_tb = NULL;
|
1064 |
CPUState *env = cpu_single_env; |
1065 |
int current_tb_modified = 0; |
1066 |
target_ulong current_pc = 0;
|
1067 |
target_ulong current_cs_base = 0;
|
1068 |
int current_flags = 0; |
1069 |
#endif
|
1070 |
|
1071 |
addr &= TARGET_PAGE_MASK; |
1072 |
p = page_find(addr >> TARGET_PAGE_BITS); |
1073 |
if (!p)
|
1074 |
return;
|
1075 |
tb = p->first_tb; |
1076 |
#ifdef TARGET_HAS_PRECISE_SMC
|
1077 |
if (tb && pc != 0) { |
1078 |
current_tb = tb_find_pc(pc); |
1079 |
} |
1080 |
#endif
|
1081 |
while (tb != NULL) { |
1082 |
n = (long)tb & 3; |
1083 |
tb = (TranslationBlock *)((long)tb & ~3); |
1084 |
#ifdef TARGET_HAS_PRECISE_SMC
|
1085 |
if (current_tb == tb &&
|
1086 |
(current_tb->cflags & CF_COUNT_MASK) != 1) {
|
1087 |
/* If we are modifying the current TB, we must stop
|
1088 |
its execution. We could be more precise by checking
|
1089 |
that the modification is after the current PC, but it
|
1090 |
would require a specialized function to partially
|
1091 |
restore the CPU state */
|
1092 |
|
1093 |
current_tb_modified = 1;
|
1094 |
cpu_restore_state(current_tb, env, pc, puc); |
1095 |
cpu_get_tb_cpu_state(env, ¤t_pc, ¤t_cs_base, |
1096 |
¤t_flags); |
1097 |
} |
1098 |
#endif /* TARGET_HAS_PRECISE_SMC */ |
1099 |
tb_phys_invalidate(tb, addr); |
1100 |
tb = tb->page_next[n]; |
1101 |
} |
1102 |
p->first_tb = NULL;
|
1103 |
#ifdef TARGET_HAS_PRECISE_SMC
|
1104 |
if (current_tb_modified) {
|
1105 |
/* we generate a block containing just the instruction
|
1106 |
modifying the memory. It will ensure that it cannot modify
|
1107 |
itself */
|
1108 |
env->current_tb = NULL;
|
1109 |
tb_gen_code(env, current_pc, current_cs_base, current_flags, 1);
|
1110 |
cpu_resume_from_signal(env, puc); |
1111 |
} |
1112 |
#endif
|
1113 |
} |
1114 |
#endif
|
1115 |
|
1116 |
/* add the tb in the target page and protect it if necessary */
|
1117 |
static inline void tb_alloc_page(TranslationBlock *tb, |
1118 |
unsigned int n, target_ulong page_addr) |
1119 |
{ |
1120 |
PageDesc *p; |
1121 |
TranslationBlock *last_first_tb; |
1122 |
|
1123 |
tb->page_addr[n] = page_addr; |
1124 |
p = page_find_alloc(page_addr >> TARGET_PAGE_BITS); |
1125 |
tb->page_next[n] = p->first_tb; |
1126 |
last_first_tb = p->first_tb; |
1127 |
p->first_tb = (TranslationBlock *)((long)tb | n);
|
1128 |
invalidate_page_bitmap(p); |
1129 |
|
1130 |
#if defined(TARGET_HAS_SMC) || 1 |
1131 |
|
1132 |
#if defined(CONFIG_USER_ONLY)
|
1133 |
if (p->flags & PAGE_WRITE) {
|
1134 |
target_ulong addr; |
1135 |
PageDesc *p2; |
1136 |
int prot;
|
1137 |
|
1138 |
/* force the host page as non writable (writes will have a
|
1139 |
page fault + mprotect overhead) */
|
1140 |
page_addr &= qemu_host_page_mask; |
1141 |
prot = 0;
|
1142 |
for(addr = page_addr; addr < page_addr + qemu_host_page_size;
|
1143 |
addr += TARGET_PAGE_SIZE) { |
1144 |
|
1145 |
p2 = page_find (addr >> TARGET_PAGE_BITS); |
1146 |
if (!p2)
|
1147 |
continue;
|
1148 |
prot |= p2->flags; |
1149 |
p2->flags &= ~PAGE_WRITE; |
1150 |
page_get_flags(addr); |
1151 |
} |
1152 |
mprotect(g2h(page_addr), qemu_host_page_size, |
1153 |
(prot & PAGE_BITS) & ~PAGE_WRITE); |
1154 |
#ifdef DEBUG_TB_INVALIDATE
|
1155 |
printf("protecting code page: 0x" TARGET_FMT_lx "\n", |
1156 |
page_addr); |
1157 |
#endif
|
1158 |
} |
1159 |
#else
|
1160 |
/* if some code is already present, then the pages are already
|
1161 |
protected. So we handle the case where only the first TB is
|
1162 |
allocated in a physical page */
|
1163 |
if (!last_first_tb) {
|
1164 |
tlb_protect_code(page_addr); |
1165 |
} |
1166 |
#endif
|
1167 |
|
1168 |
#endif /* TARGET_HAS_SMC */ |
1169 |
} |
1170 |
|
1171 |
/* Allocate a new translation block. Flush the translation buffer if
|
1172 |
too many translation blocks or too much generated code. */
|
1173 |
TranslationBlock *tb_alloc(target_ulong pc) |
1174 |
{ |
1175 |
TranslationBlock *tb; |
1176 |
|
1177 |
if (nb_tbs >= code_gen_max_blocks ||
|
1178 |
(code_gen_ptr - code_gen_buffer) >= code_gen_buffer_max_size) |
1179 |
return NULL; |
1180 |
tb = &tbs[nb_tbs++]; |
1181 |
tb->pc = pc; |
1182 |
tb->cflags = 0;
|
1183 |
return tb;
|
1184 |
} |
1185 |
|
1186 |
void tb_free(TranslationBlock *tb)
|
1187 |
{ |
1188 |
/* In practice this is mostly used for single use temporary TB
|
1189 |
Ignore the hard cases and just back up if this TB happens to
|
1190 |
be the last one generated. */
|
1191 |
if (nb_tbs > 0 && tb == &tbs[nb_tbs - 1]) { |
1192 |
code_gen_ptr = tb->tc_ptr; |
1193 |
nb_tbs--; |
1194 |
} |
1195 |
} |
1196 |
|
1197 |
/* add a new TB and link it to the physical page tables. phys_page2 is
|
1198 |
(-1) to indicate that only one page contains the TB. */
|
1199 |
void tb_link_phys(TranslationBlock *tb,
|
1200 |
target_ulong phys_pc, target_ulong phys_page2) |
1201 |
{ |
1202 |
unsigned int h; |
1203 |
TranslationBlock **ptb; |
1204 |
|
1205 |
/* Grab the mmap lock to stop another thread invalidating this TB
|
1206 |
before we are done. */
|
1207 |
mmap_lock(); |
1208 |
/* add in the physical hash table */
|
1209 |
h = tb_phys_hash_func(phys_pc); |
1210 |
ptb = &tb_phys_hash[h]; |
1211 |
tb->phys_hash_next = *ptb; |
1212 |
*ptb = tb; |
1213 |
|
1214 |
/* add in the page list */
|
1215 |
tb_alloc_page(tb, 0, phys_pc & TARGET_PAGE_MASK);
|
1216 |
if (phys_page2 != -1) |
1217 |
tb_alloc_page(tb, 1, phys_page2);
|
1218 |
else
|
1219 |
tb->page_addr[1] = -1; |
1220 |
|
1221 |
tb->jmp_first = (TranslationBlock *)((long)tb | 2); |
1222 |
tb->jmp_next[0] = NULL; |
1223 |
tb->jmp_next[1] = NULL; |
1224 |
|
1225 |
/* init original jump addresses */
|
1226 |
if (tb->tb_next_offset[0] != 0xffff) |
1227 |
tb_reset_jump(tb, 0);
|
1228 |
if (tb->tb_next_offset[1] != 0xffff) |
1229 |
tb_reset_jump(tb, 1);
|
1230 |
|
1231 |
#ifdef DEBUG_TB_CHECK
|
1232 |
tb_page_check(); |
1233 |
#endif
|
1234 |
mmap_unlock(); |
1235 |
} |
1236 |
|
1237 |
/* find the TB 'tb' such that tb[0].tc_ptr <= tc_ptr <
|
1238 |
tb[1].tc_ptr. Return NULL if not found */
|
1239 |
TranslationBlock *tb_find_pc(unsigned long tc_ptr) |
1240 |
{ |
1241 |
int m_min, m_max, m;
|
1242 |
unsigned long v; |
1243 |
TranslationBlock *tb; |
1244 |
|
1245 |
if (nb_tbs <= 0) |
1246 |
return NULL; |
1247 |
if (tc_ptr < (unsigned long)code_gen_buffer || |
1248 |
tc_ptr >= (unsigned long)code_gen_ptr) |
1249 |
return NULL; |
1250 |
/* binary search (cf Knuth) */
|
1251 |
m_min = 0;
|
1252 |
m_max = nb_tbs - 1;
|
1253 |
while (m_min <= m_max) {
|
1254 |
m = (m_min + m_max) >> 1;
|
1255 |
tb = &tbs[m]; |
1256 |
v = (unsigned long)tb->tc_ptr; |
1257 |
if (v == tc_ptr)
|
1258 |
return tb;
|
1259 |
else if (tc_ptr < v) { |
1260 |
m_max = m - 1;
|
1261 |
} else {
|
1262 |
m_min = m + 1;
|
1263 |
} |
1264 |
} |
1265 |
return &tbs[m_max];
|
1266 |
} |
1267 |
|
1268 |
static void tb_reset_jump_recursive(TranslationBlock *tb); |
1269 |
|
1270 |
static inline void tb_reset_jump_recursive2(TranslationBlock *tb, int n) |
1271 |
{ |
1272 |
TranslationBlock *tb1, *tb_next, **ptb; |
1273 |
unsigned int n1; |
1274 |
|
1275 |
tb1 = tb->jmp_next[n]; |
1276 |
if (tb1 != NULL) { |
1277 |
/* find head of list */
|
1278 |
for(;;) {
|
1279 |
n1 = (long)tb1 & 3; |
1280 |
tb1 = (TranslationBlock *)((long)tb1 & ~3); |
1281 |
if (n1 == 2) |
1282 |
break;
|
1283 |
tb1 = tb1->jmp_next[n1]; |
1284 |
} |
1285 |
/* we are now sure now that tb jumps to tb1 */
|
1286 |
tb_next = tb1; |
1287 |
|
1288 |
/* remove tb from the jmp_first list */
|
1289 |
ptb = &tb_next->jmp_first; |
1290 |
for(;;) {
|
1291 |
tb1 = *ptb; |
1292 |
n1 = (long)tb1 & 3; |
1293 |
tb1 = (TranslationBlock *)((long)tb1 & ~3); |
1294 |
if (n1 == n && tb1 == tb)
|
1295 |
break;
|
1296 |
ptb = &tb1->jmp_next[n1]; |
1297 |
} |
1298 |
*ptb = tb->jmp_next[n]; |
1299 |
tb->jmp_next[n] = NULL;
|
1300 |
|
1301 |
/* suppress the jump to next tb in generated code */
|
1302 |
tb_reset_jump(tb, n); |
1303 |
|
1304 |
/* suppress jumps in the tb on which we could have jumped */
|
1305 |
tb_reset_jump_recursive(tb_next); |
1306 |
} |
1307 |
} |
1308 |
|
1309 |
static void tb_reset_jump_recursive(TranslationBlock *tb) |
1310 |
{ |
1311 |
tb_reset_jump_recursive2(tb, 0);
|
1312 |
tb_reset_jump_recursive2(tb, 1);
|
1313 |
} |
1314 |
|
1315 |
#if defined(TARGET_HAS_ICE)
|
1316 |
static void breakpoint_invalidate(CPUState *env, target_ulong pc) |
1317 |
{ |
1318 |
target_phys_addr_t addr; |
1319 |
target_ulong pd; |
1320 |
ram_addr_t ram_addr; |
1321 |
PhysPageDesc *p; |
1322 |
|
1323 |
addr = cpu_get_phys_page_debug(env, pc); |
1324 |
p = phys_page_find(addr >> TARGET_PAGE_BITS); |
1325 |
if (!p) {
|
1326 |
pd = IO_MEM_UNASSIGNED; |
1327 |
} else {
|
1328 |
pd = p->phys_offset; |
1329 |
} |
1330 |
ram_addr = (pd & TARGET_PAGE_MASK) | (pc & ~TARGET_PAGE_MASK); |
1331 |
tb_invalidate_phys_page_range(ram_addr, ram_addr + 1, 0); |
1332 |
} |
1333 |
#endif
|
1334 |
|
1335 |
/* Add a watchpoint. */
|
1336 |
int cpu_watchpoint_insert(CPUState *env, target_ulong addr, target_ulong len,
|
1337 |
int flags, CPUWatchpoint **watchpoint)
|
1338 |
{ |
1339 |
target_ulong len_mask = ~(len - 1);
|
1340 |
CPUWatchpoint *wp; |
1341 |
|
1342 |
/* sanity checks: allow power-of-2 lengths, deny unaligned watchpoints */
|
1343 |
if ((len != 1 && len != 2 && len != 4 && len != 8) || (addr & ~len_mask)) { |
1344 |
fprintf(stderr, "qemu: tried to set invalid watchpoint at "
|
1345 |
TARGET_FMT_lx ", len=" TARGET_FMT_lu "\n", addr, len); |
1346 |
return -EINVAL;
|
1347 |
} |
1348 |
wp = qemu_malloc(sizeof(*wp));
|
1349 |
|
1350 |
wp->vaddr = addr; |
1351 |
wp->len_mask = len_mask; |
1352 |
wp->flags = flags; |
1353 |
|
1354 |
/* keep all GDB-injected watchpoints in front */
|
1355 |
if (flags & BP_GDB)
|
1356 |
QTAILQ_INSERT_HEAD(&env->watchpoints, wp, entry); |
1357 |
else
|
1358 |
QTAILQ_INSERT_TAIL(&env->watchpoints, wp, entry); |
1359 |
|
1360 |
tlb_flush_page(env, addr); |
1361 |
|
1362 |
if (watchpoint)
|
1363 |
*watchpoint = wp; |
1364 |
return 0; |
1365 |
} |
1366 |
|
1367 |
/* Remove a specific watchpoint. */
|
1368 |
int cpu_watchpoint_remove(CPUState *env, target_ulong addr, target_ulong len,
|
1369 |
int flags)
|
1370 |
{ |
1371 |
target_ulong len_mask = ~(len - 1);
|
1372 |
CPUWatchpoint *wp; |
1373 |
|
1374 |
QTAILQ_FOREACH(wp, &env->watchpoints, entry) { |
1375 |
if (addr == wp->vaddr && len_mask == wp->len_mask
|
1376 |
&& flags == (wp->flags & ~BP_WATCHPOINT_HIT)) { |
1377 |
cpu_watchpoint_remove_by_ref(env, wp); |
1378 |
return 0; |
1379 |
} |
1380 |
} |
1381 |
return -ENOENT;
|
1382 |
} |
1383 |
|
1384 |
/* Remove a specific watchpoint by reference. */
|
1385 |
void cpu_watchpoint_remove_by_ref(CPUState *env, CPUWatchpoint *watchpoint)
|
1386 |
{ |
1387 |
QTAILQ_REMOVE(&env->watchpoints, watchpoint, entry); |
1388 |
|
1389 |
tlb_flush_page(env, watchpoint->vaddr); |
1390 |
|
1391 |
qemu_free(watchpoint); |
1392 |
} |
1393 |
|
1394 |
/* Remove all matching watchpoints. */
|
1395 |
void cpu_watchpoint_remove_all(CPUState *env, int mask) |
1396 |
{ |
1397 |
CPUWatchpoint *wp, *next; |
1398 |
|
1399 |
QTAILQ_FOREACH_SAFE(wp, &env->watchpoints, entry, next) { |
1400 |
if (wp->flags & mask)
|
1401 |
cpu_watchpoint_remove_by_ref(env, wp); |
1402 |
} |
1403 |
} |
1404 |
|
1405 |
/* Add a breakpoint. */
|
1406 |
int cpu_breakpoint_insert(CPUState *env, target_ulong pc, int flags, |
1407 |
CPUBreakpoint **breakpoint) |
1408 |
{ |
1409 |
#if defined(TARGET_HAS_ICE)
|
1410 |
CPUBreakpoint *bp; |
1411 |
|
1412 |
bp = qemu_malloc(sizeof(*bp));
|
1413 |
|
1414 |
bp->pc = pc; |
1415 |
bp->flags = flags; |
1416 |
|
1417 |
/* keep all GDB-injected breakpoints in front */
|
1418 |
if (flags & BP_GDB)
|
1419 |
QTAILQ_INSERT_HEAD(&env->breakpoints, bp, entry); |
1420 |
else
|
1421 |
QTAILQ_INSERT_TAIL(&env->breakpoints, bp, entry); |
1422 |
|
1423 |
breakpoint_invalidate(env, pc); |
1424 |
|
1425 |
if (breakpoint)
|
1426 |
*breakpoint = bp; |
1427 |
return 0; |
1428 |
#else
|
1429 |
return -ENOSYS;
|
1430 |
#endif
|
1431 |
} |
1432 |
|
1433 |
/* Remove a specific breakpoint. */
|
1434 |
int cpu_breakpoint_remove(CPUState *env, target_ulong pc, int flags) |
1435 |
{ |
1436 |
#if defined(TARGET_HAS_ICE)
|
1437 |
CPUBreakpoint *bp; |
1438 |
|
1439 |
QTAILQ_FOREACH(bp, &env->breakpoints, entry) { |
1440 |
if (bp->pc == pc && bp->flags == flags) {
|
1441 |
cpu_breakpoint_remove_by_ref(env, bp); |
1442 |
return 0; |
1443 |
} |
1444 |
} |
1445 |
return -ENOENT;
|
1446 |
#else
|
1447 |
return -ENOSYS;
|
1448 |
#endif
|
1449 |
} |
1450 |
|
1451 |
/* Remove a specific breakpoint by reference. */
|
1452 |
void cpu_breakpoint_remove_by_ref(CPUState *env, CPUBreakpoint *breakpoint)
|
1453 |
{ |
1454 |
#if defined(TARGET_HAS_ICE)
|
1455 |
QTAILQ_REMOVE(&env->breakpoints, breakpoint, entry); |
1456 |
|
1457 |
breakpoint_invalidate(env, breakpoint->pc); |
1458 |
|
1459 |
qemu_free(breakpoint); |
1460 |
#endif
|
1461 |
} |
1462 |
|
1463 |
/* Remove all matching breakpoints. */
|
1464 |
void cpu_breakpoint_remove_all(CPUState *env, int mask) |
1465 |
{ |
1466 |
#if defined(TARGET_HAS_ICE)
|
1467 |
CPUBreakpoint *bp, *next; |
1468 |
|
1469 |
QTAILQ_FOREACH_SAFE(bp, &env->breakpoints, entry, next) { |
1470 |
if (bp->flags & mask)
|
1471 |
cpu_breakpoint_remove_by_ref(env, bp); |
1472 |
} |
1473 |
#endif
|
1474 |
} |
1475 |
|
1476 |
/* enable or disable single step mode. EXCP_DEBUG is returned by the
|
1477 |
CPU loop after each instruction */
|
1478 |
void cpu_single_step(CPUState *env, int enabled) |
1479 |
{ |
1480 |
#if defined(TARGET_HAS_ICE)
|
1481 |
if (env->singlestep_enabled != enabled) {
|
1482 |
env->singlestep_enabled = enabled; |
1483 |
if (kvm_enabled())
|
1484 |
kvm_update_guest_debug(env, 0);
|
1485 |
else {
|
1486 |
/* must flush all the translated code to avoid inconsistencies */
|
1487 |
/* XXX: only flush what is necessary */
|
1488 |
tb_flush(env); |
1489 |
} |
1490 |
} |
1491 |
#endif
|
1492 |
} |
1493 |
|
1494 |
/* enable or disable low levels log */
|
1495 |
void cpu_set_log(int log_flags) |
1496 |
{ |
1497 |
loglevel = log_flags; |
1498 |
if (loglevel && !logfile) {
|
1499 |
logfile = fopen(logfilename, log_append ? "a" : "w"); |
1500 |
if (!logfile) {
|
1501 |
perror(logfilename); |
1502 |
_exit(1);
|
1503 |
} |
1504 |
#if !defined(CONFIG_SOFTMMU)
|
1505 |
/* must avoid mmap() usage of glibc by setting a buffer "by hand" */
|
1506 |
{ |
1507 |
static char logfile_buf[4096]; |
1508 |
setvbuf(logfile, logfile_buf, _IOLBF, sizeof(logfile_buf));
|
1509 |
} |
1510 |
#elif !defined(_WIN32)
|
1511 |
/* Win32 doesn't support line-buffering and requires size >= 2 */
|
1512 |
setvbuf(logfile, NULL, _IOLBF, 0); |
1513 |
#endif
|
1514 |
log_append = 1;
|
1515 |
} |
1516 |
if (!loglevel && logfile) {
|
1517 |
fclose(logfile); |
1518 |
logfile = NULL;
|
1519 |
} |
1520 |
} |
1521 |
|
1522 |
void cpu_set_log_filename(const char *filename) |
1523 |
{ |
1524 |
logfilename = strdup(filename); |
1525 |
if (logfile) {
|
1526 |
fclose(logfile); |
1527 |
logfile = NULL;
|
1528 |
} |
1529 |
cpu_set_log(loglevel); |
1530 |
} |
1531 |
|
1532 |
static void cpu_unlink_tb(CPUState *env) |
1533 |
{ |
1534 |
/* FIXME: TB unchaining isn't SMP safe. For now just ignore the
|
1535 |
problem and hope the cpu will stop of its own accord. For userspace
|
1536 |
emulation this often isn't actually as bad as it sounds. Often
|
1537 |
signals are used primarily to interrupt blocking syscalls. */
|
1538 |
TranslationBlock *tb; |
1539 |
static spinlock_t interrupt_lock = SPIN_LOCK_UNLOCKED;
|
1540 |
|
1541 |
spin_lock(&interrupt_lock); |
1542 |
tb = env->current_tb; |
1543 |
/* if the cpu is currently executing code, we must unlink it and
|
1544 |
all the potentially executing TB */
|
1545 |
if (tb) {
|
1546 |
env->current_tb = NULL;
|
1547 |
tb_reset_jump_recursive(tb); |
1548 |
} |
1549 |
spin_unlock(&interrupt_lock); |
1550 |
} |
1551 |
|
1552 |
/* mask must never be zero, except for A20 change call */
|
1553 |
void cpu_interrupt(CPUState *env, int mask) |
1554 |
{ |
1555 |
int old_mask;
|
1556 |
|
1557 |
old_mask = env->interrupt_request; |
1558 |
env->interrupt_request |= mask; |
1559 |
|
1560 |
#ifndef CONFIG_USER_ONLY
|
1561 |
/*
|
1562 |
* If called from iothread context, wake the target cpu in
|
1563 |
* case its halted.
|
1564 |
*/
|
1565 |
if (!qemu_cpu_self(env)) {
|
1566 |
qemu_cpu_kick(env); |
1567 |
return;
|
1568 |
} |
1569 |
#endif
|
1570 |
|
1571 |
if (use_icount) {
|
1572 |
env->icount_decr.u16.high = 0xffff;
|
1573 |
#ifndef CONFIG_USER_ONLY
|
1574 |
if (!can_do_io(env)
|
1575 |
&& (mask & ~old_mask) != 0) {
|
1576 |
cpu_abort(env, "Raised interrupt while not in I/O function");
|
1577 |
} |
1578 |
#endif
|
1579 |
} else {
|
1580 |
cpu_unlink_tb(env); |
1581 |
} |
1582 |
} |
1583 |
|
1584 |
void cpu_reset_interrupt(CPUState *env, int mask) |
1585 |
{ |
1586 |
env->interrupt_request &= ~mask; |
1587 |
} |
1588 |
|
1589 |
void cpu_exit(CPUState *env)
|
1590 |
{ |
1591 |
env->exit_request = 1;
|
1592 |
cpu_unlink_tb(env); |
1593 |
} |
1594 |
|
1595 |
const CPULogItem cpu_log_items[] = {
|
1596 |
{ CPU_LOG_TB_OUT_ASM, "out_asm",
|
1597 |
"show generated host assembly code for each compiled TB" },
|
1598 |
{ CPU_LOG_TB_IN_ASM, "in_asm",
|
1599 |
"show target assembly code for each compiled TB" },
|
1600 |
{ CPU_LOG_TB_OP, "op",
|
1601 |
"show micro ops for each compiled TB" },
|
1602 |
{ CPU_LOG_TB_OP_OPT, "op_opt",
|
1603 |
"show micro ops "
|
1604 |
#ifdef TARGET_I386
|
1605 |
"before eflags optimization and "
|
1606 |
#endif
|
1607 |
"after liveness analysis" },
|
1608 |
{ CPU_LOG_INT, "int",
|
1609 |
"show interrupts/exceptions in short format" },
|
1610 |
{ CPU_LOG_EXEC, "exec",
|
1611 |
"show trace before each executed TB (lots of logs)" },
|
1612 |
{ CPU_LOG_TB_CPU, "cpu",
|
1613 |
"show CPU state before block translation" },
|
1614 |
#ifdef TARGET_I386
|
1615 |
{ CPU_LOG_PCALL, "pcall",
|
1616 |
"show protected mode far calls/returns/exceptions" },
|
1617 |
{ CPU_LOG_RESET, "cpu_reset",
|
1618 |
"show CPU state before CPU resets" },
|
1619 |
#endif
|
1620 |
#ifdef DEBUG_IOPORT
|
1621 |
{ CPU_LOG_IOPORT, "ioport",
|
1622 |
"show all i/o ports accesses" },
|
1623 |
#endif
|
1624 |
{ 0, NULL, NULL }, |
1625 |
}; |
1626 |
|
1627 |
static int cmp1(const char *s1, int n, const char *s2) |
1628 |
{ |
1629 |
if (strlen(s2) != n)
|
1630 |
return 0; |
1631 |
return memcmp(s1, s2, n) == 0; |
1632 |
} |
1633 |
|
1634 |
/* takes a comma separated list of log masks. Return 0 if error. */
|
1635 |
int cpu_str_to_log_mask(const char *str) |
1636 |
{ |
1637 |
const CPULogItem *item;
|
1638 |
int mask;
|
1639 |
const char *p, *p1; |
1640 |
|
1641 |
p = str; |
1642 |
mask = 0;
|
1643 |
for(;;) {
|
1644 |
p1 = strchr(p, ',');
|
1645 |
if (!p1)
|
1646 |
p1 = p + strlen(p); |
1647 |
if(cmp1(p,p1-p,"all")) { |
1648 |
for(item = cpu_log_items; item->mask != 0; item++) { |
1649 |
mask |= item->mask; |
1650 |
} |
1651 |
} else {
|
1652 |
for(item = cpu_log_items; item->mask != 0; item++) { |
1653 |
if (cmp1(p, p1 - p, item->name))
|
1654 |
goto found;
|
1655 |
} |
1656 |
return 0; |
1657 |
} |
1658 |
found:
|
1659 |
mask |= item->mask; |
1660 |
if (*p1 != ',') |
1661 |
break;
|
1662 |
p = p1 + 1;
|
1663 |
} |
1664 |
return mask;
|
1665 |
} |
1666 |
|
1667 |
void cpu_abort(CPUState *env, const char *fmt, ...) |
1668 |
{ |
1669 |
va_list ap; |
1670 |
va_list ap2; |
1671 |
|
1672 |
va_start(ap, fmt); |
1673 |
va_copy(ap2, ap); |
1674 |
fprintf(stderr, "qemu: fatal: ");
|
1675 |
vfprintf(stderr, fmt, ap); |
1676 |
fprintf(stderr, "\n");
|
1677 |
#ifdef TARGET_I386
|
1678 |
cpu_dump_state(env, stderr, fprintf, X86_DUMP_FPU | X86_DUMP_CCOP); |
1679 |
#else
|
1680 |
cpu_dump_state(env, stderr, fprintf, 0);
|
1681 |
#endif
|
1682 |
if (qemu_log_enabled()) {
|
1683 |
qemu_log("qemu: fatal: ");
|
1684 |
qemu_log_vprintf(fmt, ap2); |
1685 |
qemu_log("\n");
|
1686 |
#ifdef TARGET_I386
|
1687 |
log_cpu_state(env, X86_DUMP_FPU | X86_DUMP_CCOP); |
1688 |
#else
|
1689 |
log_cpu_state(env, 0);
|
1690 |
#endif
|
1691 |
qemu_log_flush(); |
1692 |
qemu_log_close(); |
1693 |
} |
1694 |
va_end(ap2); |
1695 |
va_end(ap); |
1696 |
#if defined(CONFIG_USER_ONLY)
|
1697 |
{ |
1698 |
struct sigaction act;
|
1699 |
sigfillset(&act.sa_mask); |
1700 |
act.sa_handler = SIG_DFL; |
1701 |
sigaction(SIGABRT, &act, NULL);
|
1702 |
} |
1703 |
#endif
|
1704 |
abort(); |
1705 |
} |
1706 |
|
1707 |
CPUState *cpu_copy(CPUState *env) |
1708 |
{ |
1709 |
CPUState *new_env = cpu_init(env->cpu_model_str); |
1710 |
CPUState *next_cpu = new_env->next_cpu; |
1711 |
int cpu_index = new_env->cpu_index;
|
1712 |
#if defined(TARGET_HAS_ICE)
|
1713 |
CPUBreakpoint *bp; |
1714 |
CPUWatchpoint *wp; |
1715 |
#endif
|
1716 |
|
1717 |
memcpy(new_env, env, sizeof(CPUState));
|
1718 |
|
1719 |
/* Preserve chaining and index. */
|
1720 |
new_env->next_cpu = next_cpu; |
1721 |
new_env->cpu_index = cpu_index; |
1722 |
|
1723 |
/* Clone all break/watchpoints.
|
1724 |
Note: Once we support ptrace with hw-debug register access, make sure
|
1725 |
BP_CPU break/watchpoints are handled correctly on clone. */
|
1726 |
QTAILQ_INIT(&env->breakpoints); |
1727 |
QTAILQ_INIT(&env->watchpoints); |
1728 |
#if defined(TARGET_HAS_ICE)
|
1729 |
QTAILQ_FOREACH(bp, &env->breakpoints, entry) { |
1730 |
cpu_breakpoint_insert(new_env, bp->pc, bp->flags, NULL);
|
1731 |
} |
1732 |
QTAILQ_FOREACH(wp, &env->watchpoints, entry) { |
1733 |
cpu_watchpoint_insert(new_env, wp->vaddr, (~wp->len_mask) + 1,
|
1734 |
wp->flags, NULL);
|
1735 |
} |
1736 |
#endif
|
1737 |
|
1738 |
return new_env;
|
1739 |
} |
1740 |
|
1741 |
#if !defined(CONFIG_USER_ONLY)
|
1742 |
|
1743 |
static inline void tlb_flush_jmp_cache(CPUState *env, target_ulong addr) |
1744 |
{ |
1745 |
unsigned int i; |
1746 |
|
1747 |
/* Discard jump cache entries for any tb which might potentially
|
1748 |
overlap the flushed page. */
|
1749 |
i = tb_jmp_cache_hash_page(addr - TARGET_PAGE_SIZE); |
1750 |
memset (&env->tb_jmp_cache[i], 0,
|
1751 |
TB_JMP_PAGE_SIZE * sizeof(TranslationBlock *));
|
1752 |
|
1753 |
i = tb_jmp_cache_hash_page(addr); |
1754 |
memset (&env->tb_jmp_cache[i], 0,
|
1755 |
TB_JMP_PAGE_SIZE * sizeof(TranslationBlock *));
|
1756 |
} |
1757 |
|
1758 |
static CPUTLBEntry s_cputlb_empty_entry = {
|
1759 |
.addr_read = -1,
|
1760 |
.addr_write = -1,
|
1761 |
.addr_code = -1,
|
1762 |
.addend = -1,
|
1763 |
}; |
1764 |
|
1765 |
/* NOTE: if flush_global is true, also flush global entries (not
|
1766 |
implemented yet) */
|
1767 |
void tlb_flush(CPUState *env, int flush_global) |
1768 |
{ |
1769 |
int i;
|
1770 |
|
1771 |
#if defined(DEBUG_TLB)
|
1772 |
printf("tlb_flush:\n");
|
1773 |
#endif
|
1774 |
/* must reset current TB so that interrupts cannot modify the
|
1775 |
links while we are modifying them */
|
1776 |
env->current_tb = NULL;
|
1777 |
|
1778 |
for(i = 0; i < CPU_TLB_SIZE; i++) { |
1779 |
int mmu_idx;
|
1780 |
for (mmu_idx = 0; mmu_idx < NB_MMU_MODES; mmu_idx++) { |
1781 |
env->tlb_table[mmu_idx][i] = s_cputlb_empty_entry; |
1782 |
} |
1783 |
} |
1784 |
|
1785 |
memset (env->tb_jmp_cache, 0, TB_JMP_CACHE_SIZE * sizeof (void *)); |
1786 |
|
1787 |
tlb_flush_count++; |
1788 |
} |
1789 |
|
1790 |
static inline void tlb_flush_entry(CPUTLBEntry *tlb_entry, target_ulong addr) |
1791 |
{ |
1792 |
if (addr == (tlb_entry->addr_read &
|
1793 |
(TARGET_PAGE_MASK | TLB_INVALID_MASK)) || |
1794 |
addr == (tlb_entry->addr_write & |
1795 |
(TARGET_PAGE_MASK | TLB_INVALID_MASK)) || |
1796 |
addr == (tlb_entry->addr_code & |
1797 |
(TARGET_PAGE_MASK | TLB_INVALID_MASK))) { |
1798 |
*tlb_entry = s_cputlb_empty_entry; |
1799 |
} |
1800 |
} |
1801 |
|
1802 |
void tlb_flush_page(CPUState *env, target_ulong addr)
|
1803 |
{ |
1804 |
int i;
|
1805 |
int mmu_idx;
|
1806 |
|
1807 |
#if defined(DEBUG_TLB)
|
1808 |
printf("tlb_flush_page: " TARGET_FMT_lx "\n", addr); |
1809 |
#endif
|
1810 |
/* must reset current TB so that interrupts cannot modify the
|
1811 |
links while we are modifying them */
|
1812 |
env->current_tb = NULL;
|
1813 |
|
1814 |
addr &= TARGET_PAGE_MASK; |
1815 |
i = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
|
1816 |
for (mmu_idx = 0; mmu_idx < NB_MMU_MODES; mmu_idx++) |
1817 |
tlb_flush_entry(&env->tlb_table[mmu_idx][i], addr); |
1818 |
|
1819 |
tlb_flush_jmp_cache(env, addr); |
1820 |
} |
1821 |
|
1822 |
/* update the TLBs so that writes to code in the virtual page 'addr'
|
1823 |
can be detected */
|
1824 |
static void tlb_protect_code(ram_addr_t ram_addr) |
1825 |
{ |
1826 |
cpu_physical_memory_reset_dirty(ram_addr, |
1827 |
ram_addr + TARGET_PAGE_SIZE, |
1828 |
CODE_DIRTY_FLAG); |
1829 |
} |
1830 |
|
1831 |
/* update the TLB so that writes in physical page 'phys_addr' are no longer
|
1832 |
tested for self modifying code */
|
1833 |
static void tlb_unprotect_code_phys(CPUState *env, ram_addr_t ram_addr, |
1834 |
target_ulong vaddr) |
1835 |
{ |
1836 |
phys_ram_dirty[ram_addr >> TARGET_PAGE_BITS] |= CODE_DIRTY_FLAG; |
1837 |
} |
1838 |
|
1839 |
static inline void tlb_reset_dirty_range(CPUTLBEntry *tlb_entry, |
1840 |
unsigned long start, unsigned long length) |
1841 |
{ |
1842 |
unsigned long addr; |
1843 |
if ((tlb_entry->addr_write & ~TARGET_PAGE_MASK) == IO_MEM_RAM) {
|
1844 |
addr = (tlb_entry->addr_write & TARGET_PAGE_MASK) + tlb_entry->addend; |
1845 |
if ((addr - start) < length) {
|
1846 |
tlb_entry->addr_write = (tlb_entry->addr_write & TARGET_PAGE_MASK) | TLB_NOTDIRTY; |
1847 |
} |
1848 |
} |
1849 |
} |
1850 |
|
1851 |
/* Note: start and end must be within the same ram block. */
|
1852 |
void cpu_physical_memory_reset_dirty(ram_addr_t start, ram_addr_t end,
|
1853 |
int dirty_flags)
|
1854 |
{ |
1855 |
CPUState *env; |
1856 |
unsigned long length, start1; |
1857 |
int i, mask, len;
|
1858 |
uint8_t *p; |
1859 |
|
1860 |
start &= TARGET_PAGE_MASK; |
1861 |
end = TARGET_PAGE_ALIGN(end); |
1862 |
|
1863 |
length = end - start; |
1864 |
if (length == 0) |
1865 |
return;
|
1866 |
len = length >> TARGET_PAGE_BITS; |
1867 |
mask = ~dirty_flags; |
1868 |
p = phys_ram_dirty + (start >> TARGET_PAGE_BITS); |
1869 |
for(i = 0; i < len; i++) |
1870 |
p[i] &= mask; |
1871 |
|
1872 |
/* we modify the TLB cache so that the dirty bit will be set again
|
1873 |
when accessing the range */
|
1874 |
start1 = (unsigned long)qemu_get_ram_ptr(start); |
1875 |
/* Chek that we don't span multiple blocks - this breaks the
|
1876 |
address comparisons below. */
|
1877 |
if ((unsigned long)qemu_get_ram_ptr(end - 1) - start1 |
1878 |
!= (end - 1) - start) {
|
1879 |
abort(); |
1880 |
} |
1881 |
|
1882 |
for(env = first_cpu; env != NULL; env = env->next_cpu) { |
1883 |
int mmu_idx;
|
1884 |
for (mmu_idx = 0; mmu_idx < NB_MMU_MODES; mmu_idx++) { |
1885 |
for(i = 0; i < CPU_TLB_SIZE; i++) |
1886 |
tlb_reset_dirty_range(&env->tlb_table[mmu_idx][i], |
1887 |
start1, length); |
1888 |
} |
1889 |
} |
1890 |
} |
1891 |
|
1892 |
int cpu_physical_memory_set_dirty_tracking(int enable) |
1893 |
{ |
1894 |
in_migration = enable; |
1895 |
if (kvm_enabled()) {
|
1896 |
return kvm_set_migration_log(enable);
|
1897 |
} |
1898 |
return 0; |
1899 |
} |
1900 |
|
1901 |
int cpu_physical_memory_get_dirty_tracking(void) |
1902 |
{ |
1903 |
return in_migration;
|
1904 |
} |
1905 |
|
1906 |
int cpu_physical_sync_dirty_bitmap(target_phys_addr_t start_addr,
|
1907 |
target_phys_addr_t end_addr) |
1908 |
{ |
1909 |
int ret = 0; |
1910 |
|
1911 |
if (kvm_enabled())
|
1912 |
ret = kvm_physical_sync_dirty_bitmap(start_addr, end_addr); |
1913 |
return ret;
|
1914 |
} |
1915 |
|
1916 |
static inline void tlb_update_dirty(CPUTLBEntry *tlb_entry) |
1917 |
{ |
1918 |
ram_addr_t ram_addr; |
1919 |
void *p;
|
1920 |
|
1921 |
if ((tlb_entry->addr_write & ~TARGET_PAGE_MASK) == IO_MEM_RAM) {
|
1922 |
p = (void *)(unsigned long)((tlb_entry->addr_write & TARGET_PAGE_MASK) |
1923 |
+ tlb_entry->addend); |
1924 |
ram_addr = qemu_ram_addr_from_host(p); |
1925 |
if (!cpu_physical_memory_is_dirty(ram_addr)) {
|
1926 |
tlb_entry->addr_write |= TLB_NOTDIRTY; |
1927 |
} |
1928 |
} |
1929 |
} |
1930 |
|
1931 |
/* update the TLB according to the current state of the dirty bits */
|
1932 |
void cpu_tlb_update_dirty(CPUState *env)
|
1933 |
{ |
1934 |
int i;
|
1935 |
int mmu_idx;
|
1936 |
for (mmu_idx = 0; mmu_idx < NB_MMU_MODES; mmu_idx++) { |
1937 |
for(i = 0; i < CPU_TLB_SIZE; i++) |
1938 |
tlb_update_dirty(&env->tlb_table[mmu_idx][i]); |
1939 |
} |
1940 |
} |
1941 |
|
1942 |
static inline void tlb_set_dirty1(CPUTLBEntry *tlb_entry, target_ulong vaddr) |
1943 |
{ |
1944 |
if (tlb_entry->addr_write == (vaddr | TLB_NOTDIRTY))
|
1945 |
tlb_entry->addr_write = vaddr; |
1946 |
} |
1947 |
|
1948 |
/* update the TLB corresponding to virtual page vaddr
|
1949 |
so that it is no longer dirty */
|
1950 |
static inline void tlb_set_dirty(CPUState *env, target_ulong vaddr) |
1951 |
{ |
1952 |
int i;
|
1953 |
int mmu_idx;
|
1954 |
|
1955 |
vaddr &= TARGET_PAGE_MASK; |
1956 |
i = (vaddr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
|
1957 |
for (mmu_idx = 0; mmu_idx < NB_MMU_MODES; mmu_idx++) |
1958 |
tlb_set_dirty1(&env->tlb_table[mmu_idx][i], vaddr); |
1959 |
} |
1960 |
|
1961 |
/* add a new TLB entry. At most one entry for a given virtual address
|
1962 |
is permitted. Return 0 if OK or 2 if the page could not be mapped
|
1963 |
(can only happen in non SOFTMMU mode for I/O pages or pages
|
1964 |
conflicting with the host address space). */
|
1965 |
int tlb_set_page_exec(CPUState *env, target_ulong vaddr,
|
1966 |
target_phys_addr_t paddr, int prot,
|
1967 |
int mmu_idx, int is_softmmu) |
1968 |
{ |
1969 |
PhysPageDesc *p; |
1970 |
unsigned long pd; |
1971 |
unsigned int index; |
1972 |
target_ulong address; |
1973 |
target_ulong code_address; |
1974 |
target_phys_addr_t addend; |
1975 |
int ret;
|
1976 |
CPUTLBEntry *te; |
1977 |
CPUWatchpoint *wp; |
1978 |
target_phys_addr_t iotlb; |
1979 |
|
1980 |
p = phys_page_find(paddr >> TARGET_PAGE_BITS); |
1981 |
if (!p) {
|
1982 |
pd = IO_MEM_UNASSIGNED; |
1983 |
} else {
|
1984 |
pd = p->phys_offset; |
1985 |
} |
1986 |
#if defined(DEBUG_TLB)
|
1987 |
printf("tlb_set_page: vaddr=" TARGET_FMT_lx " paddr=0x%08x prot=%x idx=%d smmu=%d pd=0x%08lx\n", |
1988 |
vaddr, (int)paddr, prot, mmu_idx, is_softmmu, pd);
|
1989 |
#endif
|
1990 |
|
1991 |
ret = 0;
|
1992 |
address = vaddr; |
1993 |
if ((pd & ~TARGET_PAGE_MASK) > IO_MEM_ROM && !(pd & IO_MEM_ROMD)) {
|
1994 |
/* IO memory case (romd handled later) */
|
1995 |
address |= TLB_MMIO; |
1996 |
} |
1997 |
addend = (unsigned long)qemu_get_ram_ptr(pd & TARGET_PAGE_MASK); |
1998 |
if ((pd & ~TARGET_PAGE_MASK) <= IO_MEM_ROM) {
|
1999 |
/* Normal RAM. */
|
2000 |
iotlb = pd & TARGET_PAGE_MASK; |
2001 |
if ((pd & ~TARGET_PAGE_MASK) == IO_MEM_RAM)
|
2002 |
iotlb |= IO_MEM_NOTDIRTY; |
2003 |
else
|
2004 |
iotlb |= IO_MEM_ROM; |
2005 |
} else {
|
2006 |
/* IO handlers are currently passed a physical address.
|
2007 |
It would be nice to pass an offset from the base address
|
2008 |
of that region. This would avoid having to special case RAM,
|
2009 |
and avoid full address decoding in every device.
|
2010 |
We can't use the high bits of pd for this because
|
2011 |
IO_MEM_ROMD uses these as a ram address. */
|
2012 |
iotlb = (pd & ~TARGET_PAGE_MASK); |
2013 |
if (p) {
|
2014 |
iotlb += p->region_offset; |
2015 |
} else {
|
2016 |
iotlb += paddr; |
2017 |
} |
2018 |
} |
2019 |
|
2020 |
code_address = address; |
2021 |
/* Make accesses to pages with watchpoints go via the
|
2022 |
watchpoint trap routines. */
|
2023 |
QTAILQ_FOREACH(wp, &env->watchpoints, entry) { |
2024 |
if (vaddr == (wp->vaddr & TARGET_PAGE_MASK)) {
|
2025 |
iotlb = io_mem_watch + paddr; |
2026 |
/* TODO: The memory case can be optimized by not trapping
|
2027 |
reads of pages with a write breakpoint. */
|
2028 |
address |= TLB_MMIO; |
2029 |
} |
2030 |
} |
2031 |
|
2032 |
index = (vaddr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
|
2033 |
env->iotlb[mmu_idx][index] = iotlb - vaddr; |
2034 |
te = &env->tlb_table[mmu_idx][index]; |
2035 |
te->addend = addend - vaddr; |
2036 |
if (prot & PAGE_READ) {
|
2037 |
te->addr_read = address; |
2038 |
} else {
|
2039 |
te->addr_read = -1;
|
2040 |
} |
2041 |
|
2042 |
if (prot & PAGE_EXEC) {
|
2043 |
te->addr_code = code_address; |
2044 |
} else {
|
2045 |
te->addr_code = -1;
|
2046 |
} |
2047 |
if (prot & PAGE_WRITE) {
|
2048 |
if ((pd & ~TARGET_PAGE_MASK) == IO_MEM_ROM ||
|
2049 |
(pd & IO_MEM_ROMD)) { |
2050 |
/* Write access calls the I/O callback. */
|
2051 |
te->addr_write = address | TLB_MMIO; |
2052 |
} else if ((pd & ~TARGET_PAGE_MASK) == IO_MEM_RAM && |
2053 |
!cpu_physical_memory_is_dirty(pd)) { |
2054 |
te->addr_write = address | TLB_NOTDIRTY; |
2055 |
} else {
|
2056 |
te->addr_write = address; |
2057 |
} |
2058 |
} else {
|
2059 |
te->addr_write = -1;
|
2060 |
} |
2061 |
return ret;
|
2062 |
} |
2063 |
|
2064 |
#else
|
2065 |
|
2066 |
void tlb_flush(CPUState *env, int flush_global) |
2067 |
{ |
2068 |
} |
2069 |
|
2070 |
void tlb_flush_page(CPUState *env, target_ulong addr)
|
2071 |
{ |
2072 |
} |
2073 |
|
2074 |
int tlb_set_page_exec(CPUState *env, target_ulong vaddr,
|
2075 |
target_phys_addr_t paddr, int prot,
|
2076 |
int mmu_idx, int is_softmmu) |
2077 |
{ |
2078 |
return 0; |
2079 |
} |
2080 |
|
2081 |
/*
|
2082 |
* Walks guest process memory "regions" one by one
|
2083 |
* and calls callback function 'fn' for each region.
|
2084 |
*/
|
2085 |
int walk_memory_regions(void *priv, |
2086 |
int (*fn)(void *, unsigned long, unsigned long, unsigned long)) |
2087 |
{ |
2088 |
unsigned long start, end; |
2089 |
PageDesc *p = NULL;
|
2090 |
int i, j, prot, prot1;
|
2091 |
int rc = 0; |
2092 |
|
2093 |
start = end = -1;
|
2094 |
prot = 0;
|
2095 |
|
2096 |
for (i = 0; i <= L1_SIZE; i++) { |
2097 |
p = (i < L1_SIZE) ? l1_map[i] : NULL;
|
2098 |
for (j = 0; j < L2_SIZE; j++) { |
2099 |
prot1 = (p == NULL) ? 0 : p[j].flags; |
2100 |
/*
|
2101 |
* "region" is one continuous chunk of memory
|
2102 |
* that has same protection flags set.
|
2103 |
*/
|
2104 |
if (prot1 != prot) {
|
2105 |
end = (i << (32 - L1_BITS)) | (j << TARGET_PAGE_BITS);
|
2106 |
if (start != -1) { |
2107 |
rc = (*fn)(priv, start, end, prot); |
2108 |
/* callback can stop iteration by returning != 0 */
|
2109 |
if (rc != 0) |
2110 |
return (rc);
|
2111 |
} |
2112 |
if (prot1 != 0) |
2113 |
start = end; |
2114 |
else
|
2115 |
start = -1;
|
2116 |
prot = prot1; |
2117 |
} |
2118 |
if (p == NULL) |
2119 |
break;
|
2120 |
} |
2121 |
} |
2122 |
return (rc);
|
2123 |
} |
2124 |
|
2125 |
static int dump_region(void *priv, unsigned long start, |
2126 |
unsigned long end, unsigned long prot) |
2127 |
{ |
2128 |
FILE *f = (FILE *)priv; |
2129 |
|
2130 |
(void) fprintf(f, "%08lx-%08lx %08lx %c%c%c\n", |
2131 |
start, end, end - start, |
2132 |
((prot & PAGE_READ) ? 'r' : '-'), |
2133 |
((prot & PAGE_WRITE) ? 'w' : '-'), |
2134 |
((prot & PAGE_EXEC) ? 'x' : '-')); |
2135 |
|
2136 |
return (0); |
2137 |
} |
2138 |
|
2139 |
/* dump memory mappings */
|
2140 |
void page_dump(FILE *f)
|
2141 |
{ |
2142 |
(void) fprintf(f, "%-8s %-8s %-8s %s\n", |
2143 |
"start", "end", "size", "prot"); |
2144 |
walk_memory_regions(f, dump_region); |
2145 |
} |
2146 |
|
2147 |
int page_get_flags(target_ulong address)
|
2148 |
{ |
2149 |
PageDesc *p; |
2150 |
|
2151 |
p = page_find(address >> TARGET_PAGE_BITS); |
2152 |
if (!p)
|
2153 |
return 0; |
2154 |
return p->flags;
|
2155 |
} |
2156 |
|
2157 |
/* modify the flags of a page and invalidate the code if
|
2158 |
necessary. The flag PAGE_WRITE_ORG is positioned automatically
|
2159 |
depending on PAGE_WRITE */
|
2160 |
void page_set_flags(target_ulong start, target_ulong end, int flags) |
2161 |
{ |
2162 |
PageDesc *p; |
2163 |
target_ulong addr; |
2164 |
|
2165 |
/* mmap_lock should already be held. */
|
2166 |
start = start & TARGET_PAGE_MASK; |
2167 |
end = TARGET_PAGE_ALIGN(end); |
2168 |
if (flags & PAGE_WRITE)
|
2169 |
flags |= PAGE_WRITE_ORG; |
2170 |
for(addr = start; addr < end; addr += TARGET_PAGE_SIZE) {
|
2171 |
p = page_find_alloc(addr >> TARGET_PAGE_BITS); |
2172 |
/* We may be called for host regions that are outside guest
|
2173 |
address space. */
|
2174 |
if (!p)
|
2175 |
return;
|
2176 |
/* if the write protection is set, then we invalidate the code
|
2177 |
inside */
|
2178 |
if (!(p->flags & PAGE_WRITE) &&
|
2179 |
(flags & PAGE_WRITE) && |
2180 |
p->first_tb) { |
2181 |
tb_invalidate_phys_page(addr, 0, NULL); |
2182 |
} |
2183 |
p->flags = flags; |
2184 |
} |
2185 |
} |
2186 |
|
2187 |
int page_check_range(target_ulong start, target_ulong len, int flags) |
2188 |
{ |
2189 |
PageDesc *p; |
2190 |
target_ulong end; |
2191 |
target_ulong addr; |
2192 |
|
2193 |
if (start + len < start)
|
2194 |
/* we've wrapped around */
|
2195 |
return -1; |
2196 |
|
2197 |
end = TARGET_PAGE_ALIGN(start+len); /* must do before we loose bits in the next step */
|
2198 |
start = start & TARGET_PAGE_MASK; |
2199 |
|
2200 |
for(addr = start; addr < end; addr += TARGET_PAGE_SIZE) {
|
2201 |
p = page_find(addr >> TARGET_PAGE_BITS); |
2202 |
if( !p )
|
2203 |
return -1; |
2204 |
if( !(p->flags & PAGE_VALID) )
|
2205 |
return -1; |
2206 |
|
2207 |
if ((flags & PAGE_READ) && !(p->flags & PAGE_READ))
|
2208 |
return -1; |
2209 |
if (flags & PAGE_WRITE) {
|
2210 |
if (!(p->flags & PAGE_WRITE_ORG))
|
2211 |
return -1; |
2212 |
/* unprotect the page if it was put read-only because it
|
2213 |
contains translated code */
|
2214 |
if (!(p->flags & PAGE_WRITE)) {
|
2215 |
if (!page_unprotect(addr, 0, NULL)) |
2216 |
return -1; |
2217 |
} |
2218 |
return 0; |
2219 |
} |
2220 |
} |
2221 |
return 0; |
2222 |
} |
2223 |
|
2224 |
/* called from signal handler: invalidate the code and unprotect the
|
2225 |
page. Return TRUE if the fault was successfully handled. */
|
2226 |
int page_unprotect(target_ulong address, unsigned long pc, void *puc) |
2227 |
{ |
2228 |
unsigned int page_index, prot, pindex; |
2229 |
PageDesc *p, *p1; |
2230 |
target_ulong host_start, host_end, addr; |
2231 |
|
2232 |
/* Technically this isn't safe inside a signal handler. However we
|
2233 |
know this only ever happens in a synchronous SEGV handler, so in
|
2234 |
practice it seems to be ok. */
|
2235 |
mmap_lock(); |
2236 |
|
2237 |
host_start = address & qemu_host_page_mask; |
2238 |
page_index = host_start >> TARGET_PAGE_BITS; |
2239 |
p1 = page_find(page_index); |
2240 |
if (!p1) {
|
2241 |
mmap_unlock(); |
2242 |
return 0; |
2243 |
} |
2244 |
host_end = host_start + qemu_host_page_size; |
2245 |
p = p1; |
2246 |
prot = 0;
|
2247 |
for(addr = host_start;addr < host_end; addr += TARGET_PAGE_SIZE) {
|
2248 |
prot |= p->flags; |
2249 |
p++; |
2250 |
} |
2251 |
/* if the page was really writable, then we change its
|
2252 |
protection back to writable */
|
2253 |
if (prot & PAGE_WRITE_ORG) {
|
2254 |
pindex = (address - host_start) >> TARGET_PAGE_BITS; |
2255 |
if (!(p1[pindex].flags & PAGE_WRITE)) {
|
2256 |
mprotect((void *)g2h(host_start), qemu_host_page_size,
|
2257 |
(prot & PAGE_BITS) | PAGE_WRITE); |
2258 |
p1[pindex].flags |= PAGE_WRITE; |
2259 |
/* and since the content will be modified, we must invalidate
|
2260 |
the corresponding translated code. */
|
2261 |
tb_invalidate_phys_page(address, pc, puc); |
2262 |
#ifdef DEBUG_TB_CHECK
|
2263 |
tb_invalidate_check(address); |
2264 |
#endif
|
2265 |
mmap_unlock(); |
2266 |
return 1; |
2267 |
} |
2268 |
} |
2269 |
mmap_unlock(); |
2270 |
return 0; |
2271 |
} |
2272 |
|
2273 |
static inline void tlb_set_dirty(CPUState *env, |
2274 |
unsigned long addr, target_ulong vaddr) |
2275 |
{ |
2276 |
} |
2277 |
#endif /* defined(CONFIG_USER_ONLY) */ |
2278 |
|
2279 |
#if !defined(CONFIG_USER_ONLY)
|
2280 |
|
2281 |
static int subpage_register (subpage_t *mmio, uint32_t start, uint32_t end, |
2282 |
ram_addr_t memory, ram_addr_t region_offset); |
2283 |
static void *subpage_init (target_phys_addr_t base, ram_addr_t *phys, |
2284 |
ram_addr_t orig_memory, ram_addr_t region_offset); |
2285 |
#define CHECK_SUBPAGE(addr, start_addr, start_addr2, end_addr, end_addr2, \
|
2286 |
need_subpage) \ |
2287 |
do { \
|
2288 |
if (addr > start_addr) \
|
2289 |
start_addr2 = 0; \
|
2290 |
else { \
|
2291 |
start_addr2 = start_addr & ~TARGET_PAGE_MASK; \ |
2292 |
if (start_addr2 > 0) \ |
2293 |
need_subpage = 1; \
|
2294 |
} \ |
2295 |
\ |
2296 |
if ((start_addr + orig_size) - addr >= TARGET_PAGE_SIZE) \
|
2297 |
end_addr2 = TARGET_PAGE_SIZE - 1; \
|
2298 |
else { \
|
2299 |
end_addr2 = (start_addr + orig_size - 1) & ~TARGET_PAGE_MASK; \
|
2300 |
if (end_addr2 < TARGET_PAGE_SIZE - 1) \ |
2301 |
need_subpage = 1; \
|
2302 |
} \ |
2303 |
} while (0) |
2304 |
|
2305 |
/* register physical memory.
|
2306 |
For RAM, 'size' must be a multiple of the target page size.
|
2307 |
If (phys_offset & ~TARGET_PAGE_MASK) != 0, then it is an
|
2308 |
io memory page. The address used when calling the IO function is
|
2309 |
the offset from the start of the region, plus region_offset. Both
|
2310 |
start_addr and region_offset are rounded down to a page boundary
|
2311 |
before calculating this offset. This should not be a problem unless
|
2312 |
the low bits of start_addr and region_offset differ. */
|
2313 |
void cpu_register_physical_memory_offset(target_phys_addr_t start_addr,
|
2314 |
ram_addr_t size, |
2315 |
ram_addr_t phys_offset, |
2316 |
ram_addr_t region_offset) |
2317 |
{ |
2318 |
target_phys_addr_t addr, end_addr; |
2319 |
PhysPageDesc *p; |
2320 |
CPUState *env; |
2321 |
ram_addr_t orig_size = size; |
2322 |
void *subpage;
|
2323 |
|
2324 |
if (kvm_enabled())
|
2325 |
kvm_set_phys_mem(start_addr, size, phys_offset); |
2326 |
|
2327 |
if (phys_offset == IO_MEM_UNASSIGNED) {
|
2328 |
region_offset = start_addr; |
2329 |
} |
2330 |
region_offset &= TARGET_PAGE_MASK; |
2331 |
size = (size + TARGET_PAGE_SIZE - 1) & TARGET_PAGE_MASK;
|
2332 |
end_addr = start_addr + (target_phys_addr_t)size; |
2333 |
for(addr = start_addr; addr != end_addr; addr += TARGET_PAGE_SIZE) {
|
2334 |
p = phys_page_find(addr >> TARGET_PAGE_BITS); |
2335 |
if (p && p->phys_offset != IO_MEM_UNASSIGNED) {
|
2336 |
ram_addr_t orig_memory = p->phys_offset; |
2337 |
target_phys_addr_t start_addr2, end_addr2; |
2338 |
int need_subpage = 0; |
2339 |
|
2340 |
CHECK_SUBPAGE(addr, start_addr, start_addr2, end_addr, end_addr2, |
2341 |
need_subpage); |
2342 |
if (need_subpage || phys_offset & IO_MEM_SUBWIDTH) {
|
2343 |
if (!(orig_memory & IO_MEM_SUBPAGE)) {
|
2344 |
subpage = subpage_init((addr & TARGET_PAGE_MASK), |
2345 |
&p->phys_offset, orig_memory, |
2346 |
p->region_offset); |
2347 |
} else {
|
2348 |
subpage = io_mem_opaque[(orig_memory & ~TARGET_PAGE_MASK) |
2349 |
>> IO_MEM_SHIFT]; |
2350 |
} |
2351 |
subpage_register(subpage, start_addr2, end_addr2, phys_offset, |
2352 |
region_offset); |
2353 |
p->region_offset = 0;
|
2354 |
} else {
|
2355 |
p->phys_offset = phys_offset; |
2356 |
if ((phys_offset & ~TARGET_PAGE_MASK) <= IO_MEM_ROM ||
|
2357 |
(phys_offset & IO_MEM_ROMD)) |
2358 |
phys_offset += TARGET_PAGE_SIZE; |
2359 |
} |
2360 |
} else {
|
2361 |
p = phys_page_find_alloc(addr >> TARGET_PAGE_BITS, 1);
|
2362 |
p->phys_offset = phys_offset; |
2363 |
p->region_offset = region_offset; |
2364 |
if ((phys_offset & ~TARGET_PAGE_MASK) <= IO_MEM_ROM ||
|
2365 |
(phys_offset & IO_MEM_ROMD)) { |
2366 |
phys_offset += TARGET_PAGE_SIZE; |
2367 |
} else {
|
2368 |
target_phys_addr_t start_addr2, end_addr2; |
2369 |
int need_subpage = 0; |
2370 |
|
2371 |
CHECK_SUBPAGE(addr, start_addr, start_addr2, end_addr, |
2372 |
end_addr2, need_subpage); |
2373 |
|
2374 |
if (need_subpage || phys_offset & IO_MEM_SUBWIDTH) {
|
2375 |
subpage = subpage_init((addr & TARGET_PAGE_MASK), |
2376 |
&p->phys_offset, IO_MEM_UNASSIGNED, |
2377 |
addr & TARGET_PAGE_MASK); |
2378 |
subpage_register(subpage, start_addr2, end_addr2, |
2379 |
phys_offset, region_offset); |
2380 |
p->region_offset = 0;
|
2381 |
} |
2382 |
} |
2383 |
} |
2384 |
region_offset += TARGET_PAGE_SIZE; |
2385 |
} |
2386 |
|
2387 |
/* since each CPU stores ram addresses in its TLB cache, we must
|
2388 |
reset the modified entries */
|
2389 |
/* XXX: slow ! */
|
2390 |
for(env = first_cpu; env != NULL; env = env->next_cpu) { |
2391 |
tlb_flush(env, 1);
|
2392 |
} |
2393 |
} |
2394 |
|
2395 |
/* XXX: temporary until new memory mapping API */
|
2396 |
ram_addr_t cpu_get_physical_page_desc(target_phys_addr_t addr) |
2397 |
{ |
2398 |
PhysPageDesc *p; |
2399 |
|
2400 |
p = phys_page_find(addr >> TARGET_PAGE_BITS); |
2401 |
if (!p)
|
2402 |
return IO_MEM_UNASSIGNED;
|
2403 |
return p->phys_offset;
|
2404 |
} |
2405 |
|
2406 |
void qemu_register_coalesced_mmio(target_phys_addr_t addr, ram_addr_t size)
|
2407 |
{ |
2408 |
if (kvm_enabled())
|
2409 |
kvm_coalesce_mmio_region(addr, size); |
2410 |
} |
2411 |
|
2412 |
void qemu_unregister_coalesced_mmio(target_phys_addr_t addr, ram_addr_t size)
|
2413 |
{ |
2414 |
if (kvm_enabled())
|
2415 |
kvm_uncoalesce_mmio_region(addr, size); |
2416 |
} |
2417 |
|
2418 |
ram_addr_t qemu_ram_alloc(ram_addr_t size) |
2419 |
{ |
2420 |
RAMBlock *new_block; |
2421 |
|
2422 |
size = TARGET_PAGE_ALIGN(size); |
2423 |
new_block = qemu_malloc(sizeof(*new_block));
|
2424 |
|
2425 |
#if defined(TARGET_S390X) && defined(CONFIG_KVM)
|
2426 |
/* XXX S390 KVM requires the topmost vma of the RAM to be < 256GB */
|
2427 |
new_block->host = mmap((void*)0x1000000, size, PROT_EXEC|PROT_READ|PROT_WRITE, |
2428 |
MAP_SHARED | MAP_ANONYMOUS, -1, 0); |
2429 |
#else
|
2430 |
new_block->host = qemu_vmalloc(size); |
2431 |
#endif
|
2432 |
#ifdef MADV_MERGEABLE
|
2433 |
madvise(new_block->host, size, MADV_MERGEABLE); |
2434 |
#endif
|
2435 |
new_block->offset = last_ram_offset; |
2436 |
new_block->length = size; |
2437 |
|
2438 |
new_block->next = ram_blocks; |
2439 |
ram_blocks = new_block; |
2440 |
|
2441 |
phys_ram_dirty = qemu_realloc(phys_ram_dirty, |
2442 |
(last_ram_offset + size) >> TARGET_PAGE_BITS); |
2443 |
memset(phys_ram_dirty + (last_ram_offset >> TARGET_PAGE_BITS), |
2444 |
0xff, size >> TARGET_PAGE_BITS);
|
2445 |
|
2446 |
last_ram_offset += size; |
2447 |
|
2448 |
if (kvm_enabled())
|
2449 |
kvm_setup_guest_memory(new_block->host, size); |
2450 |
|
2451 |
return new_block->offset;
|
2452 |
} |
2453 |
|
2454 |
void qemu_ram_free(ram_addr_t addr)
|
2455 |
{ |
2456 |
/* TODO: implement this. */
|
2457 |
} |
2458 |
|
2459 |
/* Return a host pointer to ram allocated with qemu_ram_alloc.
|
2460 |
With the exception of the softmmu code in this file, this should
|
2461 |
only be used for local memory (e.g. video ram) that the device owns,
|
2462 |
and knows it isn't going to access beyond the end of the block.
|
2463 |
|
2464 |
It should not be used for general purpose DMA.
|
2465 |
Use cpu_physical_memory_map/cpu_physical_memory_rw instead.
|
2466 |
*/
|
2467 |
void *qemu_get_ram_ptr(ram_addr_t addr)
|
2468 |
{ |
2469 |
RAMBlock *prev; |
2470 |
RAMBlock **prevp; |
2471 |
RAMBlock *block; |
2472 |
|
2473 |
prev = NULL;
|
2474 |
prevp = &ram_blocks; |
2475 |
block = ram_blocks; |
2476 |
while (block && (block->offset > addr
|
2477 |
|| block->offset + block->length <= addr)) { |
2478 |
if (prev)
|
2479 |
prevp = &prev->next; |
2480 |
prev = block; |
2481 |
block = block->next; |
2482 |
} |
2483 |
if (!block) {
|
2484 |
fprintf(stderr, "Bad ram offset %" PRIx64 "\n", (uint64_t)addr); |
2485 |
abort(); |
2486 |
} |
2487 |
/* Move this entry to to start of the list. */
|
2488 |
if (prev) {
|
2489 |
prev->next = block->next; |
2490 |
block->next = *prevp; |
2491 |
*prevp = block; |
2492 |
} |
2493 |
return block->host + (addr - block->offset);
|
2494 |
} |
2495 |
|
2496 |
/* Some of the softmmu routines need to translate from a host pointer
|
2497 |
(typically a TLB entry) back to a ram offset. */
|
2498 |
ram_addr_t qemu_ram_addr_from_host(void *ptr)
|
2499 |
{ |
2500 |
RAMBlock *prev; |
2501 |
RAMBlock **prevp; |
2502 |
RAMBlock *block; |
2503 |
uint8_t *host = ptr; |
2504 |
|
2505 |
prev = NULL;
|
2506 |
prevp = &ram_blocks; |
2507 |
block = ram_blocks; |
2508 |
while (block && (block->host > host
|
2509 |
|| block->host + block->length <= host)) { |
2510 |
if (prev)
|
2511 |
prevp = &prev->next; |
2512 |
prev = block; |
2513 |
block = block->next; |
2514 |
} |
2515 |
if (!block) {
|
2516 |
fprintf(stderr, "Bad ram pointer %p\n", ptr);
|
2517 |
abort(); |
2518 |
} |
2519 |
return block->offset + (host - block->host);
|
2520 |
} |
2521 |
|
2522 |
static uint32_t unassigned_mem_readb(void *opaque, target_phys_addr_t addr) |
2523 |
{ |
2524 |
#ifdef DEBUG_UNASSIGNED
|
2525 |
printf("Unassigned mem read " TARGET_FMT_plx "\n", addr); |
2526 |
#endif
|
2527 |
#if defined(TARGET_SPARC) || defined(TARGET_MICROBLAZE)
|
2528 |
do_unassigned_access(addr, 0, 0, 0, 1); |
2529 |
#endif
|
2530 |
return 0; |
2531 |
} |
2532 |
|
2533 |
static uint32_t unassigned_mem_readw(void *opaque, target_phys_addr_t addr) |
2534 |
{ |
2535 |
#ifdef DEBUG_UNASSIGNED
|
2536 |
printf("Unassigned mem read " TARGET_FMT_plx "\n", addr); |
2537 |
#endif
|
2538 |
#if defined(TARGET_SPARC) || defined(TARGET_MICROBLAZE)
|
2539 |
do_unassigned_access(addr, 0, 0, 0, 2); |
2540 |
#endif
|
2541 |
return 0; |
2542 |
} |
2543 |
|
2544 |
static uint32_t unassigned_mem_readl(void *opaque, target_phys_addr_t addr) |
2545 |
{ |
2546 |
#ifdef DEBUG_UNASSIGNED
|
2547 |
printf("Unassigned mem read " TARGET_FMT_plx "\n", addr); |
2548 |
#endif
|
2549 |
#if defined(TARGET_SPARC) || defined(TARGET_MICROBLAZE)
|
2550 |
do_unassigned_access(addr, 0, 0, 0, 4); |
2551 |
#endif
|
2552 |
return 0; |
2553 |
} |
2554 |
|
2555 |
static void unassigned_mem_writeb(void *opaque, target_phys_addr_t addr, uint32_t val) |
2556 |
{ |
2557 |
#ifdef DEBUG_UNASSIGNED
|
2558 |
printf("Unassigned mem write " TARGET_FMT_plx " = 0x%x\n", addr, val); |
2559 |
#endif
|
2560 |
#if defined(TARGET_SPARC) || defined(TARGET_MICROBLAZE)
|
2561 |
do_unassigned_access(addr, 1, 0, 0, 1); |
2562 |
#endif
|
2563 |
} |
2564 |
|
2565 |
static void unassigned_mem_writew(void *opaque, target_phys_addr_t addr, uint32_t val) |
2566 |
{ |
2567 |
#ifdef DEBUG_UNASSIGNED
|
2568 |
printf("Unassigned mem write " TARGET_FMT_plx " = 0x%x\n", addr, val); |
2569 |
#endif
|
2570 |
#if defined(TARGET_SPARC) || defined(TARGET_MICROBLAZE)
|
2571 |
do_unassigned_access(addr, 1, 0, 0, 2); |
2572 |
#endif
|
2573 |
} |
2574 |
|
2575 |
static void unassigned_mem_writel(void *opaque, target_phys_addr_t addr, uint32_t val) |
2576 |
{ |
2577 |
#ifdef DEBUG_UNASSIGNED
|
2578 |
printf("Unassigned mem write " TARGET_FMT_plx " = 0x%x\n", addr, val); |
2579 |
#endif
|
2580 |
#if defined(TARGET_SPARC) || defined(TARGET_MICROBLAZE)
|
2581 |
do_unassigned_access(addr, 1, 0, 0, 4); |
2582 |
#endif
|
2583 |
} |
2584 |
|
2585 |
static CPUReadMemoryFunc * const unassigned_mem_read[3] = { |
2586 |
unassigned_mem_readb, |
2587 |
unassigned_mem_readw, |
2588 |
unassigned_mem_readl, |
2589 |
}; |
2590 |
|
2591 |
static CPUWriteMemoryFunc * const unassigned_mem_write[3] = { |
2592 |
unassigned_mem_writeb, |
2593 |
unassigned_mem_writew, |
2594 |
unassigned_mem_writel, |
2595 |
}; |
2596 |
|
2597 |
static void notdirty_mem_writeb(void *opaque, target_phys_addr_t ram_addr, |
2598 |
uint32_t val) |
2599 |
{ |
2600 |
int dirty_flags;
|
2601 |
dirty_flags = phys_ram_dirty[ram_addr >> TARGET_PAGE_BITS]; |
2602 |
if (!(dirty_flags & CODE_DIRTY_FLAG)) {
|
2603 |
#if !defined(CONFIG_USER_ONLY)
|
2604 |
tb_invalidate_phys_page_fast(ram_addr, 1);
|
2605 |
dirty_flags = phys_ram_dirty[ram_addr >> TARGET_PAGE_BITS]; |
2606 |
#endif
|
2607 |
} |
2608 |
stb_p(qemu_get_ram_ptr(ram_addr), val); |
2609 |
dirty_flags |= (0xff & ~CODE_DIRTY_FLAG);
|
2610 |
phys_ram_dirty[ram_addr >> TARGET_PAGE_BITS] = dirty_flags; |
2611 |
/* we remove the notdirty callback only if the code has been
|
2612 |
flushed */
|
2613 |
if (dirty_flags == 0xff) |
2614 |
tlb_set_dirty(cpu_single_env, cpu_single_env->mem_io_vaddr); |
2615 |
} |
2616 |
|
2617 |
static void notdirty_mem_writew(void *opaque, target_phys_addr_t ram_addr, |
2618 |
uint32_t val) |
2619 |
{ |
2620 |
int dirty_flags;
|
2621 |
dirty_flags = phys_ram_dirty[ram_addr >> TARGET_PAGE_BITS]; |
2622 |
if (!(dirty_flags & CODE_DIRTY_FLAG)) {
|
2623 |
#if !defined(CONFIG_USER_ONLY)
|
2624 |
tb_invalidate_phys_page_fast(ram_addr, 2);
|
2625 |
dirty_flags = phys_ram_dirty[ram_addr >> TARGET_PAGE_BITS]; |
2626 |
#endif
|
2627 |
} |
2628 |
stw_p(qemu_get_ram_ptr(ram_addr), val); |
2629 |
dirty_flags |= (0xff & ~CODE_DIRTY_FLAG);
|
2630 |
phys_ram_dirty[ram_addr >> TARGET_PAGE_BITS] = dirty_flags; |
2631 |
/* we remove the notdirty callback only if the code has been
|
2632 |
flushed */
|
2633 |
if (dirty_flags == 0xff) |
2634 |
tlb_set_dirty(cpu_single_env, cpu_single_env->mem_io_vaddr); |
2635 |
} |
2636 |
|
2637 |
static void notdirty_mem_writel(void *opaque, target_phys_addr_t ram_addr, |
2638 |
uint32_t val) |
2639 |
{ |
2640 |
int dirty_flags;
|
2641 |
dirty_flags = phys_ram_dirty[ram_addr >> TARGET_PAGE_BITS]; |
2642 |
if (!(dirty_flags & CODE_DIRTY_FLAG)) {
|
2643 |
#if !defined(CONFIG_USER_ONLY)
|
2644 |
tb_invalidate_phys_page_fast(ram_addr, 4);
|
2645 |
dirty_flags = phys_ram_dirty[ram_addr >> TARGET_PAGE_BITS]; |
2646 |
#endif
|
2647 |
} |
2648 |
stl_p(qemu_get_ram_ptr(ram_addr), val); |
2649 |
dirty_flags |= (0xff & ~CODE_DIRTY_FLAG);
|
2650 |
phys_ram_dirty[ram_addr >> TARGET_PAGE_BITS] = dirty_flags; |
2651 |
/* we remove the notdirty callback only if the code has been
|
2652 |
flushed */
|
2653 |
if (dirty_flags == 0xff) |
2654 |
tlb_set_dirty(cpu_single_env, cpu_single_env->mem_io_vaddr); |
2655 |
} |
2656 |
|
2657 |
static CPUReadMemoryFunc * const error_mem_read[3] = { |
2658 |
NULL, /* never used */ |
2659 |
NULL, /* never used */ |
2660 |
NULL, /* never used */ |
2661 |
}; |
2662 |
|
2663 |
static CPUWriteMemoryFunc * const notdirty_mem_write[3] = { |
2664 |
notdirty_mem_writeb, |
2665 |
notdirty_mem_writew, |
2666 |
notdirty_mem_writel, |
2667 |
}; |
2668 |
|
2669 |
/* Generate a debug exception if a watchpoint has been hit. */
|
2670 |
static void check_watchpoint(int offset, int len_mask, int flags) |
2671 |
{ |
2672 |
CPUState *env = cpu_single_env; |
2673 |
target_ulong pc, cs_base; |
2674 |
TranslationBlock *tb; |
2675 |
target_ulong vaddr; |
2676 |
CPUWatchpoint *wp; |
2677 |
int cpu_flags;
|
2678 |
|
2679 |
if (env->watchpoint_hit) {
|
2680 |
/* We re-entered the check after replacing the TB. Now raise
|
2681 |
* the debug interrupt so that is will trigger after the
|
2682 |
* current instruction. */
|
2683 |
cpu_interrupt(env, CPU_INTERRUPT_DEBUG); |
2684 |
return;
|
2685 |
} |
2686 |
vaddr = (env->mem_io_vaddr & TARGET_PAGE_MASK) + offset; |
2687 |
QTAILQ_FOREACH(wp, &env->watchpoints, entry) { |
2688 |
if ((vaddr == (wp->vaddr & len_mask) ||
|
2689 |
(vaddr & wp->len_mask) == wp->vaddr) && (wp->flags & flags)) { |
2690 |
wp->flags |= BP_WATCHPOINT_HIT; |
2691 |
if (!env->watchpoint_hit) {
|
2692 |
env->watchpoint_hit = wp; |
2693 |
tb = tb_find_pc(env->mem_io_pc); |
2694 |
if (!tb) {
|
2695 |
cpu_abort(env, "check_watchpoint: could not find TB for "
|
2696 |
"pc=%p", (void *)env->mem_io_pc); |
2697 |
} |
2698 |
cpu_restore_state(tb, env, env->mem_io_pc, NULL);
|
2699 |
tb_phys_invalidate(tb, -1);
|
2700 |
if (wp->flags & BP_STOP_BEFORE_ACCESS) {
|
2701 |
env->exception_index = EXCP_DEBUG; |
2702 |
} else {
|
2703 |
cpu_get_tb_cpu_state(env, &pc, &cs_base, &cpu_flags); |
2704 |
tb_gen_code(env, pc, cs_base, cpu_flags, 1);
|
2705 |
} |
2706 |
cpu_resume_from_signal(env, NULL);
|
2707 |
} |
2708 |
} else {
|
2709 |
wp->flags &= ~BP_WATCHPOINT_HIT; |
2710 |
} |
2711 |
} |
2712 |
} |
2713 |
|
2714 |
/* Watchpoint access routines. Watchpoints are inserted using TLB tricks,
|
2715 |
so these check for a hit then pass through to the normal out-of-line
|
2716 |
phys routines. */
|
2717 |
static uint32_t watch_mem_readb(void *opaque, target_phys_addr_t addr) |
2718 |
{ |
2719 |
check_watchpoint(addr & ~TARGET_PAGE_MASK, ~0x0, BP_MEM_READ);
|
2720 |
return ldub_phys(addr);
|
2721 |
} |
2722 |
|
2723 |
static uint32_t watch_mem_readw(void *opaque, target_phys_addr_t addr) |
2724 |
{ |
2725 |
check_watchpoint(addr & ~TARGET_PAGE_MASK, ~0x1, BP_MEM_READ);
|
2726 |
return lduw_phys(addr);
|
2727 |
} |
2728 |
|
2729 |
static uint32_t watch_mem_readl(void *opaque, target_phys_addr_t addr) |
2730 |
{ |
2731 |
check_watchpoint(addr & ~TARGET_PAGE_MASK, ~0x3, BP_MEM_READ);
|
2732 |
return ldl_phys(addr);
|
2733 |
} |
2734 |
|
2735 |
static void watch_mem_writeb(void *opaque, target_phys_addr_t addr, |
2736 |
uint32_t val) |
2737 |
{ |
2738 |
check_watchpoint(addr & ~TARGET_PAGE_MASK, ~0x0, BP_MEM_WRITE);
|
2739 |
stb_phys(addr, val); |
2740 |
} |
2741 |
|
2742 |
static void watch_mem_writew(void *opaque, target_phys_addr_t addr, |
2743 |
uint32_t val) |
2744 |
{ |
2745 |
check_watchpoint(addr & ~TARGET_PAGE_MASK, ~0x1, BP_MEM_WRITE);
|
2746 |
stw_phys(addr, val); |
2747 |
} |
2748 |
|
2749 |
static void watch_mem_writel(void *opaque, target_phys_addr_t addr, |
2750 |
uint32_t val) |
2751 |
{ |
2752 |
check_watchpoint(addr & ~TARGET_PAGE_MASK, ~0x3, BP_MEM_WRITE);
|
2753 |
stl_phys(addr, val); |
2754 |
} |
2755 |
|
2756 |
static CPUReadMemoryFunc * const watch_mem_read[3] = { |
2757 |
watch_mem_readb, |
2758 |
watch_mem_readw, |
2759 |
watch_mem_readl, |
2760 |
}; |
2761 |
|
2762 |
static CPUWriteMemoryFunc * const watch_mem_write[3] = { |
2763 |
watch_mem_writeb, |
2764 |
watch_mem_writew, |
2765 |
watch_mem_writel, |
2766 |
}; |
2767 |
|
2768 |
static inline uint32_t subpage_readlen (subpage_t *mmio, target_phys_addr_t addr, |
2769 |
unsigned int len) |
2770 |
{ |
2771 |
uint32_t ret; |
2772 |
unsigned int idx; |
2773 |
|
2774 |
idx = SUBPAGE_IDX(addr); |
2775 |
#if defined(DEBUG_SUBPAGE)
|
2776 |
printf("%s: subpage %p len %d addr " TARGET_FMT_plx " idx %d\n", __func__, |
2777 |
mmio, len, addr, idx); |
2778 |
#endif
|
2779 |
ret = (**mmio->mem_read[idx][len])(mmio->opaque[idx][0][len],
|
2780 |
addr + mmio->region_offset[idx][0][len]);
|
2781 |
|
2782 |
return ret;
|
2783 |
} |
2784 |
|
2785 |
static inline void subpage_writelen (subpage_t *mmio, target_phys_addr_t addr, |
2786 |
uint32_t value, unsigned int len) |
2787 |
{ |
2788 |
unsigned int idx; |
2789 |
|
2790 |
idx = SUBPAGE_IDX(addr); |
2791 |
#if defined(DEBUG_SUBPAGE)
|
2792 |
printf("%s: subpage %p len %d addr " TARGET_FMT_plx " idx %d value %08x\n", __func__, |
2793 |
mmio, len, addr, idx, value); |
2794 |
#endif
|
2795 |
(**mmio->mem_write[idx][len])(mmio->opaque[idx][1][len],
|
2796 |
addr + mmio->region_offset[idx][1][len],
|
2797 |
value); |
2798 |
} |
2799 |
|
2800 |
static uint32_t subpage_readb (void *opaque, target_phys_addr_t addr) |
2801 |
{ |
2802 |
#if defined(DEBUG_SUBPAGE)
|
2803 |
printf("%s: addr " TARGET_FMT_plx "\n", __func__, addr); |
2804 |
#endif
|
2805 |
|
2806 |
return subpage_readlen(opaque, addr, 0); |
2807 |
} |
2808 |
|
2809 |
static void subpage_writeb (void *opaque, target_phys_addr_t addr, |
2810 |
uint32_t value) |
2811 |
{ |
2812 |
#if defined(DEBUG_SUBPAGE)
|
2813 |
printf("%s: addr " TARGET_FMT_plx " val %08x\n", __func__, addr, value); |
2814 |
#endif
|
2815 |
subpage_writelen(opaque, addr, value, 0);
|
2816 |
} |
2817 |
|
2818 |
static uint32_t subpage_readw (void *opaque, target_phys_addr_t addr) |
2819 |
{ |
2820 |
#if defined(DEBUG_SUBPAGE)
|
2821 |
printf("%s: addr " TARGET_FMT_plx "\n", __func__, addr); |
2822 |
#endif
|
2823 |
|
2824 |
return subpage_readlen(opaque, addr, 1); |
2825 |
} |
2826 |
|
2827 |
static void subpage_writew (void *opaque, target_phys_addr_t addr, |
2828 |
uint32_t value) |
2829 |
{ |
2830 |
#if defined(DEBUG_SUBPAGE)
|
2831 |
printf("%s: addr " TARGET_FMT_plx " val %08x\n", __func__, addr, value); |
2832 |
#endif
|
2833 |
subpage_writelen(opaque, addr, value, 1);
|
2834 |
} |
2835 |
|
2836 |
static uint32_t subpage_readl (void *opaque, target_phys_addr_t addr) |
2837 |
{ |
2838 |
#if defined(DEBUG_SUBPAGE)
|
2839 |
printf("%s: addr " TARGET_FMT_plx "\n", __func__, addr); |
2840 |
#endif
|
2841 |
|
2842 |
return subpage_readlen(opaque, addr, 2); |
2843 |
} |
2844 |
|
2845 |
static void subpage_writel (void *opaque, |
2846 |
target_phys_addr_t addr, uint32_t value) |
2847 |
{ |
2848 |
#if defined(DEBUG_SUBPAGE)
|
2849 |
printf("%s: addr " TARGET_FMT_plx " val %08x\n", __func__, addr, value); |
2850 |
#endif
|
2851 |
subpage_writelen(opaque, addr, value, 2);
|
2852 |
} |
2853 |
|
2854 |
static CPUReadMemoryFunc * const subpage_read[] = { |
2855 |
&subpage_readb, |
2856 |
&subpage_readw, |
2857 |
&subpage_readl, |
2858 |
}; |
2859 |
|
2860 |
static CPUWriteMemoryFunc * const subpage_write[] = { |
2861 |
&subpage_writeb, |
2862 |
&subpage_writew, |
2863 |
&subpage_writel, |
2864 |
}; |
2865 |
|
2866 |
static int subpage_register (subpage_t *mmio, uint32_t start, uint32_t end, |
2867 |
ram_addr_t memory, ram_addr_t region_offset) |
2868 |
{ |
2869 |
int idx, eidx;
|
2870 |
unsigned int i; |
2871 |
|
2872 |
if (start >= TARGET_PAGE_SIZE || end >= TARGET_PAGE_SIZE)
|
2873 |
return -1; |
2874 |
idx = SUBPAGE_IDX(start); |
2875 |
eidx = SUBPAGE_IDX(end); |
2876 |
#if defined(DEBUG_SUBPAGE)
|
2877 |
printf("%s: %p start %08x end %08x idx %08x eidx %08x mem %ld\n", __func__,
|
2878 |
mmio, start, end, idx, eidx, memory); |
2879 |
#endif
|
2880 |
memory >>= IO_MEM_SHIFT; |
2881 |
for (; idx <= eidx; idx++) {
|
2882 |
for (i = 0; i < 4; i++) { |
2883 |
if (io_mem_read[memory][i]) {
|
2884 |
mmio->mem_read[idx][i] = &io_mem_read[memory][i]; |
2885 |
mmio->opaque[idx][0][i] = io_mem_opaque[memory];
|
2886 |
mmio->region_offset[idx][0][i] = region_offset;
|
2887 |
} |
2888 |
if (io_mem_write[memory][i]) {
|
2889 |
mmio->mem_write[idx][i] = &io_mem_write[memory][i]; |
2890 |
mmio->opaque[idx][1][i] = io_mem_opaque[memory];
|
2891 |
mmio->region_offset[idx][1][i] = region_offset;
|
2892 |
} |
2893 |
} |
2894 |
} |
2895 |
|
2896 |
return 0; |
2897 |
} |
2898 |
|
2899 |
static void *subpage_init (target_phys_addr_t base, ram_addr_t *phys, |
2900 |
ram_addr_t orig_memory, ram_addr_t region_offset) |
2901 |
{ |
2902 |
subpage_t *mmio; |
2903 |
int subpage_memory;
|
2904 |
|
2905 |
mmio = qemu_mallocz(sizeof(subpage_t));
|
2906 |
|
2907 |
mmio->base = base; |
2908 |
subpage_memory = cpu_register_io_memory(subpage_read, subpage_write, mmio); |
2909 |
#if defined(DEBUG_SUBPAGE)
|
2910 |
printf("%s: %p base " TARGET_FMT_plx " len %08x %d\n", __func__, |
2911 |
mmio, base, TARGET_PAGE_SIZE, subpage_memory); |
2912 |
#endif
|
2913 |
*phys = subpage_memory | IO_MEM_SUBPAGE; |
2914 |
subpage_register(mmio, 0, TARGET_PAGE_SIZE - 1, orig_memory, |
2915 |
region_offset); |
2916 |
|
2917 |
return mmio;
|
2918 |
} |
2919 |
|
2920 |
static int get_free_io_mem_idx(void) |
2921 |
{ |
2922 |
int i;
|
2923 |
|
2924 |
for (i = 0; i<IO_MEM_NB_ENTRIES; i++) |
2925 |
if (!io_mem_used[i]) {
|
2926 |
io_mem_used[i] = 1;
|
2927 |
return i;
|
2928 |
} |
2929 |
fprintf(stderr, "RAN out out io_mem_idx, max %d !\n", IO_MEM_NB_ENTRIES);
|
2930 |
return -1; |
2931 |
} |
2932 |
|
2933 |
/* mem_read and mem_write are arrays of functions containing the
|
2934 |
function to access byte (index 0), word (index 1) and dword (index
|
2935 |
2). Functions can be omitted with a NULL function pointer.
|
2936 |
If io_index is non zero, the corresponding io zone is
|
2937 |
modified. If it is zero, a new io zone is allocated. The return
|
2938 |
value can be used with cpu_register_physical_memory(). (-1) is
|
2939 |
returned if error. */
|
2940 |
static int cpu_register_io_memory_fixed(int io_index, |
2941 |
CPUReadMemoryFunc * const *mem_read,
|
2942 |
CPUWriteMemoryFunc * const *mem_write,
|
2943 |
void *opaque)
|
2944 |
{ |
2945 |
int i, subwidth = 0; |
2946 |
|
2947 |
if (io_index <= 0) { |
2948 |
io_index = get_free_io_mem_idx(); |
2949 |
if (io_index == -1) |
2950 |
return io_index;
|
2951 |
} else {
|
2952 |
io_index >>= IO_MEM_SHIFT; |
2953 |
if (io_index >= IO_MEM_NB_ENTRIES)
|
2954 |
return -1; |
2955 |
} |
2956 |
|
2957 |
for(i = 0;i < 3; i++) { |
2958 |
if (!mem_read[i] || !mem_write[i])
|
2959 |
subwidth = IO_MEM_SUBWIDTH; |
2960 |
io_mem_read[io_index][i] = mem_read[i]; |
2961 |
io_mem_write[io_index][i] = mem_write[i]; |
2962 |
} |
2963 |
io_mem_opaque[io_index] = opaque; |
2964 |
return (io_index << IO_MEM_SHIFT) | subwidth;
|
2965 |
} |
2966 |
|
2967 |
int cpu_register_io_memory(CPUReadMemoryFunc * const *mem_read, |
2968 |
CPUWriteMemoryFunc * const *mem_write,
|
2969 |
void *opaque)
|
2970 |
{ |
2971 |
return cpu_register_io_memory_fixed(0, mem_read, mem_write, opaque); |
2972 |
} |
2973 |
|
2974 |
void cpu_unregister_io_memory(int io_table_address) |
2975 |
{ |
2976 |
int i;
|
2977 |
int io_index = io_table_address >> IO_MEM_SHIFT;
|
2978 |
|
2979 |
for (i=0;i < 3; i++) { |
2980 |
io_mem_read[io_index][i] = unassigned_mem_read[i]; |
2981 |
io_mem_write[io_index][i] = unassigned_mem_write[i]; |
2982 |
} |
2983 |
io_mem_opaque[io_index] = NULL;
|
2984 |
io_mem_used[io_index] = 0;
|
2985 |
} |
2986 |
|
2987 |
static void io_mem_init(void) |
2988 |
{ |
2989 |
int i;
|
2990 |
|
2991 |
cpu_register_io_memory_fixed(IO_MEM_ROM, error_mem_read, unassigned_mem_write, NULL);
|
2992 |
cpu_register_io_memory_fixed(IO_MEM_UNASSIGNED, unassigned_mem_read, unassigned_mem_write, NULL);
|
2993 |
cpu_register_io_memory_fixed(IO_MEM_NOTDIRTY, error_mem_read, notdirty_mem_write, NULL);
|
2994 |
for (i=0; i<5; i++) |
2995 |
io_mem_used[i] = 1;
|
2996 |
|
2997 |
io_mem_watch = cpu_register_io_memory(watch_mem_read, |
2998 |
watch_mem_write, NULL);
|
2999 |
} |
3000 |
|
3001 |
#endif /* !defined(CONFIG_USER_ONLY) */ |
3002 |
|
3003 |
/* physical memory access (slow version, mainly for debug) */
|
3004 |
#if defined(CONFIG_USER_ONLY)
|
3005 |
void cpu_physical_memory_rw(target_phys_addr_t addr, uint8_t *buf,
|
3006 |
int len, int is_write) |
3007 |
{ |
3008 |
int l, flags;
|
3009 |
target_ulong page; |
3010 |
void * p;
|
3011 |
|
3012 |
while (len > 0) { |
3013 |
page = addr & TARGET_PAGE_MASK; |
3014 |
l = (page + TARGET_PAGE_SIZE) - addr; |
3015 |
if (l > len)
|
3016 |
l = len; |
3017 |
flags = page_get_flags(page); |
3018 |
if (!(flags & PAGE_VALID))
|
3019 |
return;
|
3020 |
if (is_write) {
|
3021 |
if (!(flags & PAGE_WRITE))
|
3022 |
return;
|
3023 |
/* XXX: this code should not depend on lock_user */
|
3024 |
if (!(p = lock_user(VERIFY_WRITE, addr, l, 0))) |
3025 |
/* FIXME - should this return an error rather than just fail? */
|
3026 |
return;
|
3027 |
memcpy(p, buf, l); |
3028 |
unlock_user(p, addr, l); |
3029 |
} else {
|
3030 |
if (!(flags & PAGE_READ))
|
3031 |
return;
|
3032 |
/* XXX: this code should not depend on lock_user */
|
3033 |
if (!(p = lock_user(VERIFY_READ, addr, l, 1))) |
3034 |
/* FIXME - should this return an error rather than just fail? */
|
3035 |
return;
|
3036 |
memcpy(buf, p, l); |
3037 |
unlock_user(p, addr, 0);
|
3038 |
} |
3039 |
len -= l; |
3040 |
buf += l; |
3041 |
addr += l; |
3042 |
} |
3043 |
} |
3044 |
|
3045 |
#else
|
3046 |
void cpu_physical_memory_rw(target_phys_addr_t addr, uint8_t *buf,
|
3047 |
int len, int is_write) |
3048 |
{ |
3049 |
int l, io_index;
|
3050 |
uint8_t *ptr; |
3051 |
uint32_t val; |
3052 |
target_phys_addr_t page; |
3053 |
unsigned long pd; |
3054 |
PhysPageDesc *p; |
3055 |
|
3056 |
while (len > 0) { |
3057 |
page = addr & TARGET_PAGE_MASK; |
3058 |
l = (page + TARGET_PAGE_SIZE) - addr; |
3059 |
if (l > len)
|
3060 |
l = len; |
3061 |
p = phys_page_find(page >> TARGET_PAGE_BITS); |
3062 |
if (!p) {
|
3063 |
pd = IO_MEM_UNASSIGNED; |
3064 |
} else {
|
3065 |
pd = p->phys_offset; |
3066 |
} |
3067 |
|
3068 |
if (is_write) {
|
3069 |
if ((pd & ~TARGET_PAGE_MASK) != IO_MEM_RAM) {
|
3070 |
target_phys_addr_t addr1 = addr; |
3071 |
io_index = (pd >> IO_MEM_SHIFT) & (IO_MEM_NB_ENTRIES - 1);
|
3072 |
if (p)
|
3073 |
addr1 = (addr & ~TARGET_PAGE_MASK) + p->region_offset; |
3074 |
/* XXX: could force cpu_single_env to NULL to avoid
|
3075 |
potential bugs */
|
3076 |
if (l >= 4 && ((addr1 & 3) == 0)) { |
3077 |
/* 32 bit write access */
|
3078 |
val = ldl_p(buf); |
3079 |
io_mem_write[io_index][2](io_mem_opaque[io_index], addr1, val);
|
3080 |
l = 4;
|
3081 |
} else if (l >= 2 && ((addr1 & 1) == 0)) { |
3082 |
/* 16 bit write access */
|
3083 |
val = lduw_p(buf); |
3084 |
io_mem_write[io_index][1](io_mem_opaque[io_index], addr1, val);
|
3085 |
l = 2;
|
3086 |
} else {
|
3087 |
/* 8 bit write access */
|
3088 |
val = ldub_p(buf); |
3089 |
io_mem_write[io_index][0](io_mem_opaque[io_index], addr1, val);
|
3090 |
l = 1;
|
3091 |
} |
3092 |
} else {
|
3093 |
unsigned long addr1; |
3094 |
addr1 = (pd & TARGET_PAGE_MASK) + (addr & ~TARGET_PAGE_MASK); |
3095 |
/* RAM case */
|
3096 |
ptr = qemu_get_ram_ptr(addr1); |
3097 |
memcpy(ptr, buf, l); |
3098 |
if (!cpu_physical_memory_is_dirty(addr1)) {
|
3099 |
/* invalidate code */
|
3100 |
tb_invalidate_phys_page_range(addr1, addr1 + l, 0);
|
3101 |
/* set dirty bit */
|
3102 |
phys_ram_dirty[addr1 >> TARGET_PAGE_BITS] |= |
3103 |
(0xff & ~CODE_DIRTY_FLAG);
|
3104 |
} |
3105 |
} |
3106 |
} else {
|
3107 |
if ((pd & ~TARGET_PAGE_MASK) > IO_MEM_ROM &&
|
3108 |
!(pd & IO_MEM_ROMD)) { |
3109 |
target_phys_addr_t addr1 = addr; |
3110 |
/* I/O case */
|
3111 |
io_index = (pd >> IO_MEM_SHIFT) & (IO_MEM_NB_ENTRIES - 1);
|
3112 |
if (p)
|
3113 |
addr1 = (addr & ~TARGET_PAGE_MASK) + p->region_offset; |
3114 |
if (l >= 4 && ((addr1 & 3) == 0)) { |
3115 |
/* 32 bit read access */
|
3116 |
val = io_mem_read[io_index][2](io_mem_opaque[io_index], addr1);
|
3117 |
stl_p(buf, val); |
3118 |
l = 4;
|
3119 |
} else if (l >= 2 && ((addr1 & 1) == 0)) { |
3120 |
/* 16 bit read access */
|
3121 |
val = io_mem_read[io_index][1](io_mem_opaque[io_index], addr1);
|
3122 |
stw_p(buf, val); |
3123 |
l = 2;
|
3124 |
} else {
|
3125 |
/* 8 bit read access */
|
3126 |
val = io_mem_read[io_index][0](io_mem_opaque[io_index], addr1);
|
3127 |
stb_p(buf, val); |
3128 |
l = 1;
|
3129 |
} |
3130 |
} else {
|
3131 |
/* RAM case */
|
3132 |
ptr = qemu_get_ram_ptr(pd & TARGET_PAGE_MASK) + |
3133 |
(addr & ~TARGET_PAGE_MASK); |
3134 |
memcpy(buf, ptr, l); |
3135 |
} |
3136 |
} |
3137 |
len -= l; |
3138 |
buf += l; |
3139 |
addr += l; |
3140 |
} |
3141 |
} |
3142 |
|
3143 |
/* used for ROM loading : can write in RAM and ROM */
|
3144 |
void cpu_physical_memory_write_rom(target_phys_addr_t addr,
|
3145 |
const uint8_t *buf, int len) |
3146 |
{ |
3147 |
int l;
|
3148 |
uint8_t *ptr; |
3149 |
target_phys_addr_t page; |
3150 |
unsigned long pd; |
3151 |
PhysPageDesc *p; |
3152 |
|
3153 |
while (len > 0) { |
3154 |
page = addr & TARGET_PAGE_MASK; |
3155 |
l = (page + TARGET_PAGE_SIZE) - addr; |
3156 |
if (l > len)
|
3157 |
l = len; |
3158 |
p = phys_page_find(page >> TARGET_PAGE_BITS); |
3159 |
if (!p) {
|
3160 |
pd = IO_MEM_UNASSIGNED; |
3161 |
} else {
|
3162 |
pd = p->phys_offset; |
3163 |
} |
3164 |
|
3165 |
if ((pd & ~TARGET_PAGE_MASK) != IO_MEM_RAM &&
|
3166 |
(pd & ~TARGET_PAGE_MASK) != IO_MEM_ROM && |
3167 |
!(pd & IO_MEM_ROMD)) { |
3168 |
/* do nothing */
|
3169 |
} else {
|
3170 |
unsigned long addr1; |
3171 |
addr1 = (pd & TARGET_PAGE_MASK) + (addr & ~TARGET_PAGE_MASK); |
3172 |
/* ROM/RAM case */
|
3173 |
ptr = qemu_get_ram_ptr(addr1); |
3174 |
memcpy(ptr, buf, l); |
3175 |
} |
3176 |
len -= l; |
3177 |
buf += l; |
3178 |
addr += l; |
3179 |
} |
3180 |
} |
3181 |
|
3182 |
typedef struct { |
3183 |
void *buffer;
|
3184 |
target_phys_addr_t addr; |
3185 |
target_phys_addr_t len; |
3186 |
} BounceBuffer; |
3187 |
|
3188 |
static BounceBuffer bounce;
|
3189 |
|
3190 |
typedef struct MapClient { |
3191 |
void *opaque;
|
3192 |
void (*callback)(void *opaque); |
3193 |
QLIST_ENTRY(MapClient) link; |
3194 |
} MapClient; |
3195 |
|
3196 |
static QLIST_HEAD(map_client_list, MapClient) map_client_list
|
3197 |
= QLIST_HEAD_INITIALIZER(map_client_list); |
3198 |
|
3199 |
void *cpu_register_map_client(void *opaque, void (*callback)(void *opaque)) |
3200 |
{ |
3201 |
MapClient *client = qemu_malloc(sizeof(*client));
|
3202 |
|
3203 |
client->opaque = opaque; |
3204 |
client->callback = callback; |
3205 |
QLIST_INSERT_HEAD(&map_client_list, client, link); |
3206 |
return client;
|
3207 |
} |
3208 |
|
3209 |
void cpu_unregister_map_client(void *_client) |
3210 |
{ |
3211 |
MapClient *client = (MapClient *)_client; |
3212 |
|
3213 |
QLIST_REMOVE(client, link); |
3214 |
qemu_free(client); |
3215 |
} |
3216 |
|
3217 |
static void cpu_notify_map_clients(void) |
3218 |
{ |
3219 |
MapClient *client; |
3220 |
|
3221 |
while (!QLIST_EMPTY(&map_client_list)) {
|
3222 |
client = QLIST_FIRST(&map_client_list); |
3223 |
client->callback(client->opaque); |
3224 |
cpu_unregister_map_client(client); |
3225 |
} |
3226 |
} |
3227 |
|
3228 |
/* Map a physical memory region into a host virtual address.
|
3229 |
* May map a subset of the requested range, given by and returned in *plen.
|
3230 |
* May return NULL if resources needed to perform the mapping are exhausted.
|
3231 |
* Use only for reads OR writes - not for read-modify-write operations.
|
3232 |
* Use cpu_register_map_client() to know when retrying the map operation is
|
3233 |
* likely to succeed.
|
3234 |
*/
|
3235 |
void *cpu_physical_memory_map(target_phys_addr_t addr,
|
3236 |
target_phys_addr_t *plen, |
3237 |
int is_write)
|
3238 |
{ |
3239 |
target_phys_addr_t len = *plen; |
3240 |
target_phys_addr_t done = 0;
|
3241 |
int l;
|
3242 |
uint8_t *ret = NULL;
|
3243 |
uint8_t *ptr; |
3244 |
target_phys_addr_t page; |
3245 |
unsigned long pd; |
3246 |
PhysPageDesc *p; |
3247 |
unsigned long addr1; |
3248 |
|
3249 |
while (len > 0) { |
3250 |
page = addr & TARGET_PAGE_MASK; |
3251 |
l = (page + TARGET_PAGE_SIZE) - addr; |
3252 |
if (l > len)
|
3253 |
l = len; |
3254 |
p = phys_page_find(page >> TARGET_PAGE_BITS); |
3255 |
if (!p) {
|
3256 |
pd = IO_MEM_UNASSIGNED; |
3257 |
} else {
|
3258 |
pd = p->phys_offset; |
3259 |
} |
3260 |
|
3261 |
if ((pd & ~TARGET_PAGE_MASK) != IO_MEM_RAM) {
|
3262 |
if (done || bounce.buffer) {
|
3263 |
break;
|
3264 |
} |
3265 |
bounce.buffer = qemu_memalign(TARGET_PAGE_SIZE, TARGET_PAGE_SIZE); |
3266 |
bounce.addr = addr; |
3267 |
bounce.len = l; |
3268 |
if (!is_write) {
|
3269 |
cpu_physical_memory_rw(addr, bounce.buffer, l, 0);
|
3270 |
} |
3271 |
ptr = bounce.buffer; |
3272 |
} else {
|
3273 |
addr1 = (pd & TARGET_PAGE_MASK) + (addr & ~TARGET_PAGE_MASK); |
3274 |
ptr = qemu_get_ram_ptr(addr1); |
3275 |
} |
3276 |
if (!done) {
|
3277 |
ret = ptr; |
3278 |
} else if (ret + done != ptr) { |
3279 |
break;
|
3280 |
} |
3281 |
|
3282 |
len -= l; |
3283 |
addr += l; |
3284 |
done += l; |
3285 |
} |
3286 |
*plen = done; |
3287 |
return ret;
|
3288 |
} |
3289 |
|
3290 |
/* Unmaps a memory region previously mapped by cpu_physical_memory_map().
|
3291 |
* Will also mark the memory as dirty if is_write == 1. access_len gives
|
3292 |
* the amount of memory that was actually read or written by the caller.
|
3293 |
*/
|
3294 |
void cpu_physical_memory_unmap(void *buffer, target_phys_addr_t len, |
3295 |
int is_write, target_phys_addr_t access_len)
|
3296 |
{ |
3297 |
if (buffer != bounce.buffer) {
|
3298 |
if (is_write) {
|
3299 |
ram_addr_t addr1 = qemu_ram_addr_from_host(buffer); |
3300 |
while (access_len) {
|
3301 |
unsigned l;
|
3302 |
l = TARGET_PAGE_SIZE; |
3303 |
if (l > access_len)
|
3304 |
l = access_len; |
3305 |
if (!cpu_physical_memory_is_dirty(addr1)) {
|
3306 |
/* invalidate code */
|
3307 |
tb_invalidate_phys_page_range(addr1, addr1 + l, 0);
|
3308 |
/* set dirty bit */
|
3309 |
phys_ram_dirty[addr1 >> TARGET_PAGE_BITS] |= |
3310 |
(0xff & ~CODE_DIRTY_FLAG);
|
3311 |
} |
3312 |
addr1 += l; |
3313 |
access_len -= l; |
3314 |
} |
3315 |
} |
3316 |
return;
|
3317 |
} |
3318 |
if (is_write) {
|
3319 |
cpu_physical_memory_write(bounce.addr, bounce.buffer, access_len); |
3320 |
} |
3321 |
qemu_vfree(bounce.buffer); |
3322 |
bounce.buffer = NULL;
|
3323 |
cpu_notify_map_clients(); |
3324 |
} |
3325 |
|
3326 |
/* warning: addr must be aligned */
|
3327 |
uint32_t ldl_phys(target_phys_addr_t addr) |
3328 |
{ |
3329 |
int io_index;
|
3330 |
uint8_t *ptr; |
3331 |
uint32_t val; |
3332 |
unsigned long pd; |
3333 |
PhysPageDesc *p; |
3334 |
|
3335 |
p = phys_page_find(addr >> TARGET_PAGE_BITS); |
3336 |
if (!p) {
|
3337 |
pd = IO_MEM_UNASSIGNED; |
3338 |
} else {
|
3339 |
pd = p->phys_offset; |
3340 |
} |
3341 |
|
3342 |
if ((pd & ~TARGET_PAGE_MASK) > IO_MEM_ROM &&
|
3343 |
!(pd & IO_MEM_ROMD)) { |
3344 |
/* I/O case */
|
3345 |
io_index = (pd >> IO_MEM_SHIFT) & (IO_MEM_NB_ENTRIES - 1);
|
3346 |
if (p)
|
3347 |
addr = (addr & ~TARGET_PAGE_MASK) + p->region_offset; |
3348 |
val = io_mem_read[io_index][2](io_mem_opaque[io_index], addr);
|
3349 |
} else {
|
3350 |
/* RAM case */
|
3351 |
ptr = qemu_get_ram_ptr(pd & TARGET_PAGE_MASK) + |
3352 |
(addr & ~TARGET_PAGE_MASK); |
3353 |
val = ldl_p(ptr); |
3354 |
} |
3355 |
return val;
|
3356 |
} |
3357 |
|
3358 |
/* warning: addr must be aligned */
|
3359 |
uint64_t ldq_phys(target_phys_addr_t addr) |
3360 |
{ |
3361 |
int io_index;
|
3362 |
uint8_t *ptr; |
3363 |
uint64_t val; |
3364 |
unsigned long pd; |
3365 |
PhysPageDesc *p; |
3366 |
|
3367 |
p = phys_page_find(addr >> TARGET_PAGE_BITS); |
3368 |
if (!p) {
|
3369 |
pd = IO_MEM_UNASSIGNED; |
3370 |
} else {
|
3371 |
pd = p->phys_offset; |
3372 |
} |
3373 |
|
3374 |
if ((pd & ~TARGET_PAGE_MASK) > IO_MEM_ROM &&
|
3375 |
!(pd & IO_MEM_ROMD)) { |
3376 |
/* I/O case */
|
3377 |
io_index = (pd >> IO_MEM_SHIFT) & (IO_MEM_NB_ENTRIES - 1);
|
3378 |
if (p)
|
3379 |
addr = (addr & ~TARGET_PAGE_MASK) + p->region_offset; |
3380 |
#ifdef TARGET_WORDS_BIGENDIAN
|
3381 |
val = (uint64_t)io_mem_read[io_index][2](io_mem_opaque[io_index], addr) << 32; |
3382 |
val |= io_mem_read[io_index][2](io_mem_opaque[io_index], addr + 4); |
3383 |
#else
|
3384 |
val = io_mem_read[io_index][2](io_mem_opaque[io_index], addr);
|
3385 |
val |= (uint64_t)io_mem_read[io_index][2](io_mem_opaque[io_index], addr + 4) << 32; |
3386 |
#endif
|
3387 |
} else {
|
3388 |
/* RAM case */
|
3389 |
ptr = qemu_get_ram_ptr(pd & TARGET_PAGE_MASK) + |
3390 |
(addr & ~TARGET_PAGE_MASK); |
3391 |
val = ldq_p(ptr); |
3392 |
} |
3393 |
return val;
|
3394 |
} |
3395 |
|
3396 |
/* XXX: optimize */
|
3397 |
uint32_t ldub_phys(target_phys_addr_t addr) |
3398 |
{ |
3399 |
uint8_t val; |
3400 |
cpu_physical_memory_read(addr, &val, 1);
|
3401 |
return val;
|
3402 |
} |
3403 |
|
3404 |
/* XXX: optimize */
|
3405 |
uint32_t lduw_phys(target_phys_addr_t addr) |
3406 |
{ |
3407 |
uint16_t val; |
3408 |
cpu_physical_memory_read(addr, (uint8_t *)&val, 2);
|
3409 |
return tswap16(val);
|
3410 |
} |
3411 |
|
3412 |
/* warning: addr must be aligned. The ram page is not masked as dirty
|
3413 |
and the code inside is not invalidated. It is useful if the dirty
|
3414 |
bits are used to track modified PTEs */
|
3415 |
void stl_phys_notdirty(target_phys_addr_t addr, uint32_t val)
|
3416 |
{ |
3417 |
int io_index;
|
3418 |
uint8_t *ptr; |
3419 |
unsigned long pd; |
3420 |
PhysPageDesc *p; |
3421 |
|
3422 |
p = phys_page_find(addr >> TARGET_PAGE_BITS); |
3423 |
if (!p) {
|
3424 |
pd = IO_MEM_UNASSIGNED; |
3425 |
} else {
|
3426 |
pd = p->phys_offset; |
3427 |
} |
3428 |
|
3429 |
if ((pd & ~TARGET_PAGE_MASK) != IO_MEM_RAM) {
|
3430 |
io_index = (pd >> IO_MEM_SHIFT) & (IO_MEM_NB_ENTRIES - 1);
|
3431 |
if (p)
|
3432 |
addr = (addr & ~TARGET_PAGE_MASK) + p->region_offset; |
3433 |
io_mem_write[io_index][2](io_mem_opaque[io_index], addr, val);
|
3434 |
} else {
|
3435 |
unsigned long addr1 = (pd & TARGET_PAGE_MASK) + (addr & ~TARGET_PAGE_MASK); |
3436 |
ptr = qemu_get_ram_ptr(addr1); |
3437 |
stl_p(ptr, val); |
3438 |
|
3439 |
if (unlikely(in_migration)) {
|
3440 |
if (!cpu_physical_memory_is_dirty(addr1)) {
|
3441 |
/* invalidate code */
|
3442 |
tb_invalidate_phys_page_range(addr1, addr1 + 4, 0); |
3443 |
/* set dirty bit */
|
3444 |
phys_ram_dirty[addr1 >> TARGET_PAGE_BITS] |= |
3445 |
(0xff & ~CODE_DIRTY_FLAG);
|
3446 |
} |
3447 |
} |
3448 |
} |
3449 |
} |
3450 |
|
3451 |
void stq_phys_notdirty(target_phys_addr_t addr, uint64_t val)
|
3452 |
{ |
3453 |
int io_index;
|
3454 |
uint8_t *ptr; |
3455 |
unsigned long pd; |
3456 |
PhysPageDesc *p; |
3457 |
|
3458 |
p = phys_page_find(addr >> TARGET_PAGE_BITS); |
3459 |
if (!p) {
|
3460 |
pd = IO_MEM_UNASSIGNED; |
3461 |
} else {
|
3462 |
pd = p->phys_offset; |
3463 |
} |
3464 |
|
3465 |
if ((pd & ~TARGET_PAGE_MASK) != IO_MEM_RAM) {
|
3466 |
io_index = (pd >> IO_MEM_SHIFT) & (IO_MEM_NB_ENTRIES - 1);
|
3467 |
if (p)
|
3468 |
addr = (addr & ~TARGET_PAGE_MASK) + p->region_offset; |
3469 |
#ifdef TARGET_WORDS_BIGENDIAN
|
3470 |
io_mem_write[io_index][2](io_mem_opaque[io_index], addr, val >> 32); |
3471 |
io_mem_write[io_index][2](io_mem_opaque[io_index], addr + 4, val); |
3472 |
#else
|
3473 |
io_mem_write[io_index][2](io_mem_opaque[io_index], addr, val);
|
3474 |
io_mem_write[io_index][2](io_mem_opaque[io_index], addr + 4, val >> 32); |
3475 |
#endif
|
3476 |
} else {
|
3477 |
ptr = qemu_get_ram_ptr(pd & TARGET_PAGE_MASK) + |
3478 |
(addr & ~TARGET_PAGE_MASK); |
3479 |
stq_p(ptr, val); |
3480 |
} |
3481 |
} |
3482 |
|
3483 |
/* warning: addr must be aligned */
|
3484 |
void stl_phys(target_phys_addr_t addr, uint32_t val)
|
3485 |
{ |
3486 |
int io_index;
|
3487 |
uint8_t *ptr; |
3488 |
unsigned long pd; |
3489 |
PhysPageDesc *p; |
3490 |
|
3491 |
p = phys_page_find(addr >> TARGET_PAGE_BITS); |
3492 |
if (!p) {
|
3493 |
pd = IO_MEM_UNASSIGNED; |
3494 |
} else {
|
3495 |
pd = p->phys_offset; |
3496 |
} |
3497 |
|
3498 |
if ((pd & ~TARGET_PAGE_MASK) != IO_MEM_RAM) {
|
3499 |
io_index = (pd >> IO_MEM_SHIFT) & (IO_MEM_NB_ENTRIES - 1);
|
3500 |
if (p)
|
3501 |
addr = (addr & ~TARGET_PAGE_MASK) + p->region_offset; |
3502 |
io_mem_write[io_index][2](io_mem_opaque[io_index], addr, val);
|
3503 |
} else {
|
3504 |
unsigned long addr1; |
3505 |
addr1 = (pd & TARGET_PAGE_MASK) + (addr & ~TARGET_PAGE_MASK); |
3506 |
/* RAM case */
|
3507 |
ptr = qemu_get_ram_ptr(addr1); |
3508 |
stl_p(ptr, val); |
3509 |
if (!cpu_physical_memory_is_dirty(addr1)) {
|
3510 |
/* invalidate code */
|
3511 |
tb_invalidate_phys_page_range(addr1, addr1 + 4, 0); |
3512 |
/* set dirty bit */
|
3513 |
phys_ram_dirty[addr1 >> TARGET_PAGE_BITS] |= |
3514 |
(0xff & ~CODE_DIRTY_FLAG);
|
3515 |
} |
3516 |
} |
3517 |
} |
3518 |
|
3519 |
/* XXX: optimize */
|
3520 |
void stb_phys(target_phys_addr_t addr, uint32_t val)
|
3521 |
{ |
3522 |
uint8_t v = val; |
3523 |
cpu_physical_memory_write(addr, &v, 1);
|
3524 |
} |
3525 |
|
3526 |
/* XXX: optimize */
|
3527 |
void stw_phys(target_phys_addr_t addr, uint32_t val)
|
3528 |
{ |
3529 |
uint16_t v = tswap16(val); |
3530 |
cpu_physical_memory_write(addr, (const uint8_t *)&v, 2); |
3531 |
} |
3532 |
|
3533 |
/* XXX: optimize */
|
3534 |
void stq_phys(target_phys_addr_t addr, uint64_t val)
|
3535 |
{ |
3536 |
val = tswap64(val); |
3537 |
cpu_physical_memory_write(addr, (const uint8_t *)&val, 8); |
3538 |
} |
3539 |
|
3540 |
#endif
|
3541 |
|
3542 |
/* virtual memory access for debug (includes writing to ROM) */
|
3543 |
int cpu_memory_rw_debug(CPUState *env, target_ulong addr,
|
3544 |
uint8_t *buf, int len, int is_write) |
3545 |
{ |
3546 |
int l;
|
3547 |
target_phys_addr_t phys_addr; |
3548 |
target_ulong page; |
3549 |
|
3550 |
while (len > 0) { |
3551 |
page = addr & TARGET_PAGE_MASK; |
3552 |
phys_addr = cpu_get_phys_page_debug(env, page); |
3553 |
/* if no physical page mapped, return an error */
|
3554 |
if (phys_addr == -1) |
3555 |
return -1; |
3556 |
l = (page + TARGET_PAGE_SIZE) - addr; |
3557 |
if (l > len)
|
3558 |
l = len; |
3559 |
phys_addr += (addr & ~TARGET_PAGE_MASK); |
3560 |
#if !defined(CONFIG_USER_ONLY)
|
3561 |
if (is_write)
|
3562 |
cpu_physical_memory_write_rom(phys_addr, buf, l); |
3563 |
else
|
3564 |
#endif
|
3565 |
cpu_physical_memory_rw(phys_addr, buf, l, is_write); |
3566 |
len -= l; |
3567 |
buf += l; |
3568 |
addr += l; |
3569 |
} |
3570 |
return 0; |
3571 |
} |
3572 |
|
3573 |
/* in deterministic execution mode, instructions doing device I/Os
|
3574 |
must be at the end of the TB */
|
3575 |
void cpu_io_recompile(CPUState *env, void *retaddr) |
3576 |
{ |
3577 |
TranslationBlock *tb; |
3578 |
uint32_t n, cflags; |
3579 |
target_ulong pc, cs_base; |
3580 |
uint64_t flags; |
3581 |
|
3582 |
tb = tb_find_pc((unsigned long)retaddr); |
3583 |
if (!tb) {
|
3584 |
cpu_abort(env, "cpu_io_recompile: could not find TB for pc=%p",
|
3585 |
retaddr); |
3586 |
} |
3587 |
n = env->icount_decr.u16.low + tb->icount; |
3588 |
cpu_restore_state(tb, env, (unsigned long)retaddr, NULL); |
3589 |
/* Calculate how many instructions had been executed before the fault
|
3590 |
occurred. */
|
3591 |
n = n - env->icount_decr.u16.low; |
3592 |
/* Generate a new TB ending on the I/O insn. */
|
3593 |
n++; |
3594 |
/* On MIPS and SH, delay slot instructions can only be restarted if
|
3595 |
they were already the first instruction in the TB. If this is not
|
3596 |
the first instruction in a TB then re-execute the preceding
|
3597 |
branch. */
|
3598 |
#if defined(TARGET_MIPS)
|
3599 |
if ((env->hflags & MIPS_HFLAG_BMASK) != 0 && n > 1) { |
3600 |
env->active_tc.PC -= 4;
|
3601 |
env->icount_decr.u16.low++; |
3602 |
env->hflags &= ~MIPS_HFLAG_BMASK; |
3603 |
} |
3604 |
#elif defined(TARGET_SH4)
|
3605 |
if ((env->flags & ((DELAY_SLOT | DELAY_SLOT_CONDITIONAL))) != 0 |
3606 |
&& n > 1) {
|
3607 |
env->pc -= 2;
|
3608 |
env->icount_decr.u16.low++; |
3609 |
env->flags &= ~(DELAY_SLOT | DELAY_SLOT_CONDITIONAL); |
3610 |
} |
3611 |
#endif
|
3612 |
/* This should never happen. */
|
3613 |
if (n > CF_COUNT_MASK)
|
3614 |
cpu_abort(env, "TB too big during recompile");
|
3615 |
|
3616 |
cflags = n | CF_LAST_IO; |
3617 |
pc = tb->pc; |
3618 |
cs_base = tb->cs_base; |
3619 |
flags = tb->flags; |
3620 |
tb_phys_invalidate(tb, -1);
|
3621 |
/* FIXME: In theory this could raise an exception. In practice
|
3622 |
we have already translated the block once so it's probably ok. */
|
3623 |
tb_gen_code(env, pc, cs_base, flags, cflags); |
3624 |
/* TODO: If env->pc != tb->pc (i.e. the faulting instruction was not
|
3625 |
the first in the TB) then we end up generating a whole new TB and
|
3626 |
repeating the fault, which is horribly inefficient.
|
3627 |
Better would be to execute just this insn uncached, or generate a
|
3628 |
second new TB. */
|
3629 |
cpu_resume_from_signal(env, NULL);
|
3630 |
} |
3631 |
|
3632 |
void dump_exec_info(FILE *f,
|
3633 |
int (*cpu_fprintf)(FILE *f, const char *fmt, ...)) |
3634 |
{ |
3635 |
int i, target_code_size, max_target_code_size;
|
3636 |
int direct_jmp_count, direct_jmp2_count, cross_page;
|
3637 |
TranslationBlock *tb; |
3638 |
|
3639 |
target_code_size = 0;
|
3640 |
max_target_code_size = 0;
|
3641 |
cross_page = 0;
|
3642 |
direct_jmp_count = 0;
|
3643 |
direct_jmp2_count = 0;
|
3644 |
for(i = 0; i < nb_tbs; i++) { |
3645 |
tb = &tbs[i]; |
3646 |
target_code_size += tb->size; |
3647 |
if (tb->size > max_target_code_size)
|
3648 |
max_target_code_size = tb->size; |
3649 |
if (tb->page_addr[1] != -1) |
3650 |
cross_page++; |
3651 |
if (tb->tb_next_offset[0] != 0xffff) { |
3652 |
direct_jmp_count++; |
3653 |
if (tb->tb_next_offset[1] != 0xffff) { |
3654 |
direct_jmp2_count++; |
3655 |
} |
3656 |
} |
3657 |
} |
3658 |
/* XXX: avoid using doubles ? */
|
3659 |
cpu_fprintf(f, "Translation buffer state:\n");
|
3660 |
cpu_fprintf(f, "gen code size %ld/%ld\n",
|
3661 |
code_gen_ptr - code_gen_buffer, code_gen_buffer_max_size); |
3662 |
cpu_fprintf(f, "TB count %d/%d\n",
|
3663 |
nb_tbs, code_gen_max_blocks); |
3664 |
cpu_fprintf(f, "TB avg target size %d max=%d bytes\n",
|
3665 |
nb_tbs ? target_code_size / nb_tbs : 0,
|
3666 |
max_target_code_size); |
3667 |
cpu_fprintf(f, "TB avg host size %d bytes (expansion ratio: %0.1f)\n",
|
3668 |
nb_tbs ? (code_gen_ptr - code_gen_buffer) / nb_tbs : 0,
|
3669 |
target_code_size ? (double) (code_gen_ptr - code_gen_buffer) / target_code_size : 0); |
3670 |
cpu_fprintf(f, "cross page TB count %d (%d%%)\n",
|
3671 |
cross_page, |
3672 |
nb_tbs ? (cross_page * 100) / nb_tbs : 0); |
3673 |
cpu_fprintf(f, "direct jump count %d (%d%%) (2 jumps=%d %d%%)\n",
|
3674 |
direct_jmp_count, |
3675 |
nb_tbs ? (direct_jmp_count * 100) / nb_tbs : 0, |
3676 |
direct_jmp2_count, |
3677 |
nb_tbs ? (direct_jmp2_count * 100) / nb_tbs : 0); |
3678 |
cpu_fprintf(f, "\nStatistics:\n");
|
3679 |
cpu_fprintf(f, "TB flush count %d\n", tb_flush_count);
|
3680 |
cpu_fprintf(f, "TB invalidate count %d\n", tb_phys_invalidate_count);
|
3681 |
cpu_fprintf(f, "TLB flush count %d\n", tlb_flush_count);
|
3682 |
tcg_dump_info(f, cpu_fprintf); |
3683 |
} |
3684 |
|
3685 |
#if !defined(CONFIG_USER_ONLY)
|
3686 |
|
3687 |
#define MMUSUFFIX _cmmu
|
3688 |
#define GETPC() NULL |
3689 |
#define env cpu_single_env
|
3690 |
#define SOFTMMU_CODE_ACCESS
|
3691 |
|
3692 |
#define SHIFT 0 |
3693 |
#include "softmmu_template.h" |
3694 |
|
3695 |
#define SHIFT 1 |
3696 |
#include "softmmu_template.h" |
3697 |
|
3698 |
#define SHIFT 2 |
3699 |
#include "softmmu_template.h" |
3700 |
|
3701 |
#define SHIFT 3 |
3702 |
#include "softmmu_template.h" |
3703 |
|
3704 |
#undef env
|
3705 |
|
3706 |
#endif
|