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/*
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* Virtual page mapping
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*
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* Copyright (c) 2003 Fabrice Bellard
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include "config.h" |
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#ifdef _WIN32
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#include <windows.h> |
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#else
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#include <sys/types.h> |
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#include <sys/mman.h> |
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#endif
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#include "qemu-common.h" |
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#include "cpu.h" |
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#include "tcg.h" |
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#include "hw/hw.h" |
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#include "hw/qdev.h" |
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#include "qemu/osdep.h" |
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#include "sysemu/kvm.h" |
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#include "hw/xen/xen.h" |
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#include "qemu/timer.h" |
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#include "qemu/config-file.h" |
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#include "exec/memory.h" |
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#include "sysemu/dma.h" |
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#include "exec/address-spaces.h" |
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#if defined(CONFIG_USER_ONLY)
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#include <qemu.h> |
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#else /* !CONFIG_USER_ONLY */ |
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#include "sysemu/xen-mapcache.h" |
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#include "trace.h" |
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#endif
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#include "exec/cpu-all.h" |
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#include "exec/cputlb.h" |
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#include "translate-all.h" |
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#include "exec/memory-internal.h" |
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//#define DEBUG_SUBPAGE
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#if !defined(CONFIG_USER_ONLY)
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int phys_ram_fd;
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static int in_migration; |
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RAMList ram_list = { .blocks = QTAILQ_HEAD_INITIALIZER(ram_list.blocks) };
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static MemoryRegion *system_memory;
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static MemoryRegion *system_io;
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|
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AddressSpace address_space_io; |
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AddressSpace address_space_memory; |
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DMAContext dma_context_memory; |
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|
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MemoryRegion io_mem_rom, io_mem_notdirty; |
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static MemoryRegion io_mem_unassigned, io_mem_subpage_ram;
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#endif
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CPUArchState *first_cpu; |
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/* current CPU in the current thread. It is only valid inside
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cpu_exec() */
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DEFINE_TLS(CPUArchState *,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;
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#if !defined(CONFIG_USER_ONLY)
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static MemoryRegionSection *phys_sections;
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static unsigned phys_sections_nb, phys_sections_nb_alloc; |
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static uint16_t phys_section_unassigned;
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static uint16_t phys_section_notdirty;
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static uint16_t phys_section_rom;
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static uint16_t phys_section_watch;
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/* Simple allocator for PhysPageEntry nodes */
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static PhysPageEntry (*phys_map_nodes)[L2_SIZE];
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static unsigned phys_map_nodes_nb, phys_map_nodes_nb_alloc; |
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#define PHYS_MAP_NODE_NIL (((uint16_t)~0) >> 1) |
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static void io_mem_init(void); |
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static void memory_map_init(void); |
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static void *qemu_safe_ram_ptr(ram_addr_t addr); |
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static MemoryRegion io_mem_watch;
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#endif
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#if !defined(CONFIG_USER_ONLY)
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static void phys_map_node_reserve(unsigned nodes) |
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{
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if (phys_map_nodes_nb + nodes > phys_map_nodes_nb_alloc) {
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typedef PhysPageEntry Node[L2_SIZE];
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phys_map_nodes_nb_alloc = MAX(phys_map_nodes_nb_alloc * 2, 16); |
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phys_map_nodes_nb_alloc = MAX(phys_map_nodes_nb_alloc, |
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phys_map_nodes_nb + nodes); |
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phys_map_nodes = g_renew(Node, phys_map_nodes, |
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phys_map_nodes_nb_alloc); |
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} |
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} |
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static uint16_t phys_map_node_alloc(void) |
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{
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unsigned i;
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uint16_t ret; |
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ret = phys_map_nodes_nb++; |
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assert(ret != PHYS_MAP_NODE_NIL); |
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assert(ret != phys_map_nodes_nb_alloc); |
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for (i = 0; i < L2_SIZE; ++i) { |
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phys_map_nodes[ret][i].is_leaf = 0;
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phys_map_nodes[ret][i].ptr = PHYS_MAP_NODE_NIL; |
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} |
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return ret;
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} |
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static void phys_map_nodes_reset(void) |
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{
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phys_map_nodes_nb = 0;
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} |
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static void phys_page_set_level(PhysPageEntry *lp, hwaddr *index, |
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hwaddr *nb, uint16_t leaf, |
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int level)
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{
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PhysPageEntry *p; |
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int i;
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hwaddr step = (hwaddr)1 << (level * L2_BITS);
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if (!lp->is_leaf && lp->ptr == PHYS_MAP_NODE_NIL) {
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lp->ptr = phys_map_node_alloc(); |
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p = phys_map_nodes[lp->ptr]; |
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if (level == 0) { |
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for (i = 0; i < L2_SIZE; i++) { |
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p[i].is_leaf = 1;
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p[i].ptr = phys_section_unassigned; |
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} |
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} |
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} else {
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p = phys_map_nodes[lp->ptr]; |
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} |
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lp = &p[(*index >> (level * L2_BITS)) & (L2_SIZE - 1)];
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while (*nb && lp < &p[L2_SIZE]) {
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if ((*index & (step - 1)) == 0 && *nb >= step) { |
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lp->is_leaf = true;
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lp->ptr = leaf; |
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*index += step; |
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*nb -= step; |
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} else {
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phys_page_set_level(lp, index, nb, leaf, level - 1);
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} |
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++lp; |
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} |
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} |
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static void phys_page_set(AddressSpaceDispatch *d, |
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hwaddr index, hwaddr nb, |
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uint16_t leaf) |
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{
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/* Wildly overreserve - it doesn't matter much. */
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phys_map_node_reserve(3 * P_L2_LEVELS);
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phys_page_set_level(&d->phys_map, &index, &nb, leaf, P_L2_LEVELS - 1);
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} |
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static MemoryRegionSection *phys_page_find(AddressSpaceDispatch *d, hwaddr index)
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{
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PhysPageEntry lp = d->phys_map; |
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PhysPageEntry *p; |
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int i;
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for (i = P_L2_LEVELS - 1; i >= 0 && !lp.is_leaf; i--) { |
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if (lp.ptr == PHYS_MAP_NODE_NIL) {
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return &phys_sections[phys_section_unassigned];
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} |
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p = phys_map_nodes[lp.ptr]; |
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lp = p[(index >> (i * L2_BITS)) & (L2_SIZE - 1)];
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} |
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return &phys_sections[lp.ptr];
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} |
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bool memory_region_is_unassigned(MemoryRegion *mr)
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{
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return mr != &io_mem_rom && mr != &io_mem_notdirty && !mr->rom_device
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&& mr != &io_mem_watch; |
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} |
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MemoryRegionSection *address_space_translate(AddressSpace *as, hwaddr addr, |
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hwaddr *xlat, hwaddr *plen, |
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bool is_write)
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{
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MemoryRegionSection *section; |
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Int128 diff; |
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section = phys_page_find(as->dispatch, addr >> TARGET_PAGE_BITS); |
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/* Compute offset within MemoryRegionSection */
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addr -= section->offset_within_address_space; |
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/* Compute offset within MemoryRegion */
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*xlat = addr + section->offset_within_region; |
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diff = int128_sub(section->mr->size, int128_make64(addr)); |
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*plen = MIN(int128_get64(diff), *plen); |
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return section;
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} |
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#endif
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void cpu_exec_init_all(void) |
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{
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#if !defined(CONFIG_USER_ONLY)
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qemu_mutex_init(&ram_list.mutex); |
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memory_map_init(); |
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io_mem_init(); |
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#endif
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} |
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#if !defined(CONFIG_USER_ONLY)
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static int cpu_common_post_load(void *opaque, int version_id) |
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{
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CPUState *cpu = opaque; |
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/* 0x01 was CPU_INTERRUPT_EXIT. This line can be removed when the
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version_id is increased. */
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cpu->interrupt_request &= ~0x01;
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tlb_flush(cpu->env_ptr, 1);
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return 0; |
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} |
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static const VMStateDescription vmstate_cpu_common = { |
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.name = "cpu_common",
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.version_id = 1,
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.minimum_version_id = 1,
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.minimum_version_id_old = 1,
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.post_load = cpu_common_post_load, |
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.fields = (VMStateField []) {
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VMSTATE_UINT32(halted, CPUState), |
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VMSTATE_UINT32(interrupt_request, CPUState), |
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VMSTATE_END_OF_LIST() |
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} |
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}; |
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#else
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#define vmstate_cpu_common vmstate_dummy
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#endif
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CPUState *qemu_get_cpu(int index)
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{
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CPUArchState *env = first_cpu; |
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CPUState *cpu = NULL;
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while (env) {
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cpu = ENV_GET_CPU(env); |
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if (cpu->cpu_index == index) {
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break;
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} |
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env = env->next_cpu; |
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} |
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return env ? cpu : NULL; |
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} |
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void qemu_for_each_cpu(void (*func)(CPUState *cpu, void *data), void *data) |
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{
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CPUArchState *env = first_cpu; |
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while (env) {
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func(ENV_GET_CPU(env), data); |
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env = env->next_cpu; |
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} |
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} |
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void cpu_exec_init(CPUArchState *env)
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{
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CPUState *cpu = ENV_GET_CPU(env); |
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CPUClass *cc = CPU_GET_CLASS(cpu); |
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CPUArchState **penv; |
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int cpu_index;
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#if defined(CONFIG_USER_ONLY)
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cpu_list_lock(); |
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#endif
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env->next_cpu = NULL;
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penv = &first_cpu; |
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cpu_index = 0;
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while (*penv != NULL) { |
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penv = &(*penv)->next_cpu; |
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cpu_index++; |
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} |
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cpu->cpu_index = cpu_index; |
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cpu->numa_node = 0;
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QTAILQ_INIT(&env->breakpoints); |
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QTAILQ_INIT(&env->watchpoints); |
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#ifndef CONFIG_USER_ONLY
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cpu->thread_id = qemu_get_thread_id(); |
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#endif
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*penv = env; |
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#if defined(CONFIG_USER_ONLY)
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cpu_list_unlock(); |
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#endif
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vmstate_register(NULL, cpu_index, &vmstate_cpu_common, cpu);
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#if defined(CPU_SAVE_VERSION) && !defined(CONFIG_USER_ONLY)
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register_savevm(NULL, "cpu", cpu_index, CPU_SAVE_VERSION, |
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cpu_save, cpu_load, env); |
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assert(cc->vmsd == NULL);
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#endif
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if (cc->vmsd != NULL) { |
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vmstate_register(NULL, cpu_index, cc->vmsd, cpu);
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} |
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} |
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|
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#if defined(TARGET_HAS_ICE)
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#if defined(CONFIG_USER_ONLY)
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static void breakpoint_invalidate(CPUArchState *env, target_ulong pc) |
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{
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tb_invalidate_phys_page_range(pc, pc + 1, 0); |
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} |
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#else
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static void breakpoint_invalidate(CPUArchState *env, target_ulong pc) |
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{
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tb_invalidate_phys_addr(cpu_get_phys_page_debug(env, pc) | |
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(pc & ~TARGET_PAGE_MASK)); |
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} |
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#endif
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#endif /* TARGET_HAS_ICE */ |
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|
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#if defined(CONFIG_USER_ONLY)
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void cpu_watchpoint_remove_all(CPUArchState *env, int mask) |
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|
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{
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} |
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int cpu_watchpoint_insert(CPUArchState *env, target_ulong addr, target_ulong len,
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int flags, CPUWatchpoint **watchpoint)
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{
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return -ENOSYS;
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} |
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#else
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/* Add a watchpoint. */
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int cpu_watchpoint_insert(CPUArchState *env, target_ulong addr, target_ulong len,
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int flags, CPUWatchpoint **watchpoint)
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{
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target_ulong len_mask = ~(len - 1);
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CPUWatchpoint *wp; |
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|
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/* sanity checks: allow power-of-2 lengths, deny unaligned watchpoints */
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if ((len & (len - 1)) || (addr & ~len_mask) || |
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len == 0 || len > TARGET_PAGE_SIZE) {
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fprintf(stderr, "qemu: tried to set invalid watchpoint at "
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TARGET_FMT_lx ", len=" TARGET_FMT_lu "\n", addr, len); |
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return -EINVAL;
|
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} |
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wp = g_malloc(sizeof(*wp));
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|
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wp->vaddr = addr; |
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wp->len_mask = len_mask; |
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wp->flags = flags; |
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|
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/* keep all GDB-injected watchpoints in front */
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if (flags & BP_GDB)
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QTAILQ_INSERT_HEAD(&env->watchpoints, wp, entry); |
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else
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QTAILQ_INSERT_TAIL(&env->watchpoints, wp, entry); |
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|
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tlb_flush_page(env, addr); |
| 384 |
|
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if (watchpoint)
|
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*watchpoint = wp; |
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return 0; |
| 388 |
} |
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|
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/* Remove a specific watchpoint. */
|
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int cpu_watchpoint_remove(CPUArchState *env, target_ulong addr, target_ulong len,
|
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int flags)
|
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{
|
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target_ulong len_mask = ~(len - 1);
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CPUWatchpoint *wp; |
| 396 |
|
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QTAILQ_FOREACH(wp, &env->watchpoints, entry) {
|
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if (addr == wp->vaddr && len_mask == wp->len_mask
|
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&& flags == (wp->flags & ~BP_WATCHPOINT_HIT)) {
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cpu_watchpoint_remove_by_ref(env, wp); |
| 401 |
return 0; |
| 402 |
} |
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} |
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return -ENOENT;
|
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} |
| 406 |
|
| 407 |
/* Remove a specific watchpoint by reference. */
|
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void cpu_watchpoint_remove_by_ref(CPUArchState *env, CPUWatchpoint *watchpoint)
|
| 409 |
{
|
| 410 |
QTAILQ_REMOVE(&env->watchpoints, watchpoint, entry); |
| 411 |
|
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tlb_flush_page(env, watchpoint->vaddr); |
| 413 |
|
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g_free(watchpoint); |
| 415 |
} |
| 416 |
|
| 417 |
/* Remove all matching watchpoints. */
|
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void cpu_watchpoint_remove_all(CPUArchState *env, int mask) |
| 419 |
{
|
| 420 |
CPUWatchpoint *wp, *next; |
| 421 |
|
| 422 |
QTAILQ_FOREACH_SAFE(wp, &env->watchpoints, entry, next) {
|
| 423 |
if (wp->flags & mask)
|
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cpu_watchpoint_remove_by_ref(env, wp); |
| 425 |
} |
| 426 |
} |
| 427 |
#endif
|
| 428 |
|
| 429 |
/* Add a breakpoint. */
|
| 430 |
int cpu_breakpoint_insert(CPUArchState *env, target_ulong pc, int flags, |
| 431 |
CPUBreakpoint **breakpoint) |
| 432 |
{
|
| 433 |
#if defined(TARGET_HAS_ICE)
|
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CPUBreakpoint *bp; |
| 435 |
|
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bp = g_malloc(sizeof(*bp));
|
| 437 |
|
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bp->pc = pc; |
| 439 |
bp->flags = flags; |
| 440 |
|
| 441 |
/* keep all GDB-injected breakpoints in front */
|
| 442 |
if (flags & BP_GDB)
|
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QTAILQ_INSERT_HEAD(&env->breakpoints, bp, entry); |
| 444 |
else
|
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QTAILQ_INSERT_TAIL(&env->breakpoints, bp, entry); |
| 446 |
|
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breakpoint_invalidate(env, pc); |
| 448 |
|
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if (breakpoint)
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*breakpoint = bp; |
| 451 |
return 0; |
| 452 |
#else
|
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return -ENOSYS;
|
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#endif
|
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} |
| 456 |
|
| 457 |
/* Remove a specific breakpoint. */
|
| 458 |
int cpu_breakpoint_remove(CPUArchState *env, target_ulong pc, int flags) |
| 459 |
{
|
| 460 |
#if defined(TARGET_HAS_ICE)
|
| 461 |
CPUBreakpoint *bp; |
| 462 |
|
| 463 |
QTAILQ_FOREACH(bp, &env->breakpoints, entry) {
|
| 464 |
if (bp->pc == pc && bp->flags == flags) {
|
| 465 |
cpu_breakpoint_remove_by_ref(env, bp); |
| 466 |
return 0; |
| 467 |
} |
| 468 |
} |
| 469 |
return -ENOENT;
|
| 470 |
#else
|
| 471 |
return -ENOSYS;
|
| 472 |
#endif
|
| 473 |
} |
| 474 |
|
| 475 |
/* Remove a specific breakpoint by reference. */
|
| 476 |
void cpu_breakpoint_remove_by_ref(CPUArchState *env, CPUBreakpoint *breakpoint)
|
| 477 |
{
|
| 478 |
#if defined(TARGET_HAS_ICE)
|
| 479 |
QTAILQ_REMOVE(&env->breakpoints, breakpoint, entry); |
| 480 |
|
| 481 |
breakpoint_invalidate(env, breakpoint->pc); |
| 482 |
|
| 483 |
g_free(breakpoint); |
| 484 |
#endif
|
| 485 |
} |
| 486 |
|
| 487 |
/* Remove all matching breakpoints. */
|
| 488 |
void cpu_breakpoint_remove_all(CPUArchState *env, int mask) |
| 489 |
{
|
| 490 |
#if defined(TARGET_HAS_ICE)
|
| 491 |
CPUBreakpoint *bp, *next; |
| 492 |
|
| 493 |
QTAILQ_FOREACH_SAFE(bp, &env->breakpoints, entry, next) {
|
| 494 |
if (bp->flags & mask)
|
| 495 |
cpu_breakpoint_remove_by_ref(env, bp); |
| 496 |
} |
| 497 |
#endif
|
| 498 |
} |
| 499 |
|
| 500 |
/* enable or disable single step mode. EXCP_DEBUG is returned by the
|
| 501 |
CPU loop after each instruction */
|
| 502 |
void cpu_single_step(CPUArchState *env, int enabled) |
| 503 |
{
|
| 504 |
#if defined(TARGET_HAS_ICE)
|
| 505 |
if (env->singlestep_enabled != enabled) {
|
| 506 |
env->singlestep_enabled = enabled; |
| 507 |
if (kvm_enabled())
|
| 508 |
kvm_update_guest_debug(env, 0);
|
| 509 |
else {
|
| 510 |
/* must flush all the translated code to avoid inconsistencies */
|
| 511 |
/* XXX: only flush what is necessary */
|
| 512 |
tb_flush(env); |
| 513 |
} |
| 514 |
} |
| 515 |
#endif
|
| 516 |
} |
| 517 |
|
| 518 |
void cpu_exit(CPUArchState *env)
|
| 519 |
{
|
| 520 |
CPUState *cpu = ENV_GET_CPU(env); |
| 521 |
|
| 522 |
cpu->exit_request = 1;
|
| 523 |
cpu->tcg_exit_req = 1;
|
| 524 |
} |
| 525 |
|
| 526 |
void cpu_abort(CPUArchState *env, const char *fmt, ...) |
| 527 |
{
|
| 528 |
va_list ap; |
| 529 |
va_list ap2; |
| 530 |
|
| 531 |
va_start(ap, fmt); |
| 532 |
va_copy(ap2, ap); |
| 533 |
fprintf(stderr, "qemu: fatal: ");
|
| 534 |
vfprintf(stderr, fmt, ap); |
| 535 |
fprintf(stderr, "\n");
|
| 536 |
cpu_dump_state(env, stderr, fprintf, CPU_DUMP_FPU | CPU_DUMP_CCOP); |
| 537 |
if (qemu_log_enabled()) {
|
| 538 |
qemu_log("qemu: fatal: ");
|
| 539 |
qemu_log_vprintf(fmt, ap2); |
| 540 |
qemu_log("\n");
|
| 541 |
log_cpu_state(env, CPU_DUMP_FPU | CPU_DUMP_CCOP); |
| 542 |
qemu_log_flush(); |
| 543 |
qemu_log_close(); |
| 544 |
} |
| 545 |
va_end(ap2); |
| 546 |
va_end(ap); |
| 547 |
#if defined(CONFIG_USER_ONLY)
|
| 548 |
{
|
| 549 |
struct sigaction act;
|
| 550 |
sigfillset(&act.sa_mask); |
| 551 |
act.sa_handler = SIG_DFL; |
| 552 |
sigaction(SIGABRT, &act, NULL);
|
| 553 |
} |
| 554 |
#endif
|
| 555 |
abort(); |
| 556 |
} |
| 557 |
|
| 558 |
CPUArchState *cpu_copy(CPUArchState *env) |
| 559 |
{
|
| 560 |
CPUArchState *new_env = cpu_init(env->cpu_model_str); |
| 561 |
CPUArchState *next_cpu = new_env->next_cpu; |
| 562 |
#if defined(TARGET_HAS_ICE)
|
| 563 |
CPUBreakpoint *bp; |
| 564 |
CPUWatchpoint *wp; |
| 565 |
#endif
|
| 566 |
|
| 567 |
memcpy(new_env, env, sizeof(CPUArchState));
|
| 568 |
|
| 569 |
/* Preserve chaining. */
|
| 570 |
new_env->next_cpu = next_cpu; |
| 571 |
|
| 572 |
/* Clone all break/watchpoints.
|
| 573 |
Note: Once we support ptrace with hw-debug register access, make sure
|
| 574 |
BP_CPU break/watchpoints are handled correctly on clone. */
|
| 575 |
QTAILQ_INIT(&env->breakpoints); |
| 576 |
QTAILQ_INIT(&env->watchpoints); |
| 577 |
#if defined(TARGET_HAS_ICE)
|
| 578 |
QTAILQ_FOREACH(bp, &env->breakpoints, entry) {
|
| 579 |
cpu_breakpoint_insert(new_env, bp->pc, bp->flags, NULL);
|
| 580 |
} |
| 581 |
QTAILQ_FOREACH(wp, &env->watchpoints, entry) {
|
| 582 |
cpu_watchpoint_insert(new_env, wp->vaddr, (~wp->len_mask) + 1,
|
| 583 |
wp->flags, NULL);
|
| 584 |
} |
| 585 |
#endif
|
| 586 |
|
| 587 |
return new_env;
|
| 588 |
} |
| 589 |
|
| 590 |
#if !defined(CONFIG_USER_ONLY)
|
| 591 |
static void tlb_reset_dirty_range_all(ram_addr_t start, ram_addr_t end, |
| 592 |
uintptr_t length) |
| 593 |
{
|
| 594 |
uintptr_t start1; |
| 595 |
|
| 596 |
/* we modify the TLB cache so that the dirty bit will be set again
|
| 597 |
when accessing the range */
|
| 598 |
start1 = (uintptr_t)qemu_safe_ram_ptr(start); |
| 599 |
/* Check that we don't span multiple blocks - this breaks the
|
| 600 |
address comparisons below. */
|
| 601 |
if ((uintptr_t)qemu_safe_ram_ptr(end - 1) - start1 |
| 602 |
!= (end - 1) - start) {
|
| 603 |
abort(); |
| 604 |
} |
| 605 |
cpu_tlb_reset_dirty_all(start1, length); |
| 606 |
|
| 607 |
} |
| 608 |
|
| 609 |
/* Note: start and end must be within the same ram block. */
|
| 610 |
void cpu_physical_memory_reset_dirty(ram_addr_t start, ram_addr_t end,
|
| 611 |
int dirty_flags)
|
| 612 |
{
|
| 613 |
uintptr_t length; |
| 614 |
|
| 615 |
start &= TARGET_PAGE_MASK; |
| 616 |
end = TARGET_PAGE_ALIGN(end); |
| 617 |
|
| 618 |
length = end - start; |
| 619 |
if (length == 0) |
| 620 |
return;
|
| 621 |
cpu_physical_memory_mask_dirty_range(start, length, dirty_flags); |
| 622 |
|
| 623 |
if (tcg_enabled()) {
|
| 624 |
tlb_reset_dirty_range_all(start, end, length); |
| 625 |
} |
| 626 |
} |
| 627 |
|
| 628 |
static int cpu_physical_memory_set_dirty_tracking(int enable) |
| 629 |
{
|
| 630 |
int ret = 0; |
| 631 |
in_migration = enable; |
| 632 |
return ret;
|
| 633 |
} |
| 634 |
|
| 635 |
hwaddr memory_region_section_get_iotlb(CPUArchState *env, |
| 636 |
MemoryRegionSection *section, |
| 637 |
target_ulong vaddr, |
| 638 |
hwaddr paddr, hwaddr xlat, |
| 639 |
int prot,
|
| 640 |
target_ulong *address) |
| 641 |
{
|
| 642 |
hwaddr iotlb; |
| 643 |
CPUWatchpoint *wp; |
| 644 |
|
| 645 |
if (memory_region_is_ram(section->mr)) {
|
| 646 |
/* Normal RAM. */
|
| 647 |
iotlb = (memory_region_get_ram_addr(section->mr) & TARGET_PAGE_MASK) |
| 648 |
+ xlat; |
| 649 |
if (!section->readonly) {
|
| 650 |
iotlb |= phys_section_notdirty; |
| 651 |
} else {
|
| 652 |
iotlb |= phys_section_rom; |
| 653 |
} |
| 654 |
} else {
|
| 655 |
iotlb = section - phys_sections; |
| 656 |
iotlb += xlat; |
| 657 |
} |
| 658 |
|
| 659 |
/* Make accesses to pages with watchpoints go via the
|
| 660 |
watchpoint trap routines. */
|
| 661 |
QTAILQ_FOREACH(wp, &env->watchpoints, entry) {
|
| 662 |
if (vaddr == (wp->vaddr & TARGET_PAGE_MASK)) {
|
| 663 |
/* Avoid trapping reads of pages with a write breakpoint. */
|
| 664 |
if ((prot & PAGE_WRITE) || (wp->flags & BP_MEM_READ)) {
|
| 665 |
iotlb = phys_section_watch + paddr; |
| 666 |
*address |= TLB_MMIO; |
| 667 |
break;
|
| 668 |
} |
| 669 |
} |
| 670 |
} |
| 671 |
|
| 672 |
return iotlb;
|
| 673 |
} |
| 674 |
#endif /* defined(CONFIG_USER_ONLY) */ |
| 675 |
|
| 676 |
#if !defined(CONFIG_USER_ONLY)
|
| 677 |
|
| 678 |
#define SUBPAGE_IDX(addr) ((addr) & ~TARGET_PAGE_MASK)
|
| 679 |
typedef struct subpage_t { |
| 680 |
MemoryRegion iomem; |
| 681 |
hwaddr base; |
| 682 |
uint16_t sub_section[TARGET_PAGE_SIZE]; |
| 683 |
} subpage_t; |
| 684 |
|
| 685 |
static int subpage_register (subpage_t *mmio, uint32_t start, uint32_t end, |
| 686 |
uint16_t section); |
| 687 |
static subpage_t *subpage_init(hwaddr base);
|
| 688 |
static void destroy_page_desc(uint16_t section_index) |
| 689 |
{
|
| 690 |
MemoryRegionSection *section = &phys_sections[section_index]; |
| 691 |
MemoryRegion *mr = section->mr; |
| 692 |
|
| 693 |
if (mr->subpage) {
|
| 694 |
subpage_t *subpage = container_of(mr, subpage_t, iomem); |
| 695 |
memory_region_destroy(&subpage->iomem); |
| 696 |
g_free(subpage); |
| 697 |
} |
| 698 |
} |
| 699 |
|
| 700 |
static void destroy_l2_mapping(PhysPageEntry *lp, unsigned level) |
| 701 |
{
|
| 702 |
unsigned i;
|
| 703 |
PhysPageEntry *p; |
| 704 |
|
| 705 |
if (lp->ptr == PHYS_MAP_NODE_NIL) {
|
| 706 |
return;
|
| 707 |
} |
| 708 |
|
| 709 |
p = phys_map_nodes[lp->ptr]; |
| 710 |
for (i = 0; i < L2_SIZE; ++i) { |
| 711 |
if (!p[i].is_leaf) {
|
| 712 |
destroy_l2_mapping(&p[i], level - 1);
|
| 713 |
} else {
|
| 714 |
destroy_page_desc(p[i].ptr); |
| 715 |
} |
| 716 |
} |
| 717 |
lp->is_leaf = 0;
|
| 718 |
lp->ptr = PHYS_MAP_NODE_NIL; |
| 719 |
} |
| 720 |
|
| 721 |
static void destroy_all_mappings(AddressSpaceDispatch *d) |
| 722 |
{
|
| 723 |
destroy_l2_mapping(&d->phys_map, P_L2_LEVELS - 1);
|
| 724 |
phys_map_nodes_reset(); |
| 725 |
} |
| 726 |
|
| 727 |
static uint16_t phys_section_add(MemoryRegionSection *section)
|
| 728 |
{
|
| 729 |
/* The physical section number is ORed with a page-aligned
|
| 730 |
* pointer to produce the iotlb entries. Thus it should
|
| 731 |
* never overflow into the page-aligned value.
|
| 732 |
*/
|
| 733 |
assert(phys_sections_nb < TARGET_PAGE_SIZE); |
| 734 |
|
| 735 |
if (phys_sections_nb == phys_sections_nb_alloc) {
|
| 736 |
phys_sections_nb_alloc = MAX(phys_sections_nb_alloc * 2, 16); |
| 737 |
phys_sections = g_renew(MemoryRegionSection, phys_sections, |
| 738 |
phys_sections_nb_alloc); |
| 739 |
} |
| 740 |
phys_sections[phys_sections_nb] = *section; |
| 741 |
return phys_sections_nb++;
|
| 742 |
} |
| 743 |
|
| 744 |
static void phys_sections_clear(void) |
| 745 |
{
|
| 746 |
phys_sections_nb = 0;
|
| 747 |
} |
| 748 |
|
| 749 |
static void register_subpage(AddressSpaceDispatch *d, MemoryRegionSection *section) |
| 750 |
{
|
| 751 |
subpage_t *subpage; |
| 752 |
hwaddr base = section->offset_within_address_space |
| 753 |
& TARGET_PAGE_MASK; |
| 754 |
MemoryRegionSection *existing = phys_page_find(d, base >> TARGET_PAGE_BITS); |
| 755 |
MemoryRegionSection subsection = {
|
| 756 |
.offset_within_address_space = base, |
| 757 |
.size = TARGET_PAGE_SIZE, |
| 758 |
}; |
| 759 |
hwaddr start, end; |
| 760 |
|
| 761 |
assert(existing->mr->subpage || existing->mr == &io_mem_unassigned); |
| 762 |
|
| 763 |
if (!(existing->mr->subpage)) {
|
| 764 |
subpage = subpage_init(base); |
| 765 |
subsection.mr = &subpage->iomem; |
| 766 |
phys_page_set(d, base >> TARGET_PAGE_BITS, 1,
|
| 767 |
phys_section_add(&subsection)); |
| 768 |
} else {
|
| 769 |
subpage = container_of(existing->mr, subpage_t, iomem); |
| 770 |
} |
| 771 |
start = section->offset_within_address_space & ~TARGET_PAGE_MASK; |
| 772 |
end = start + section->size - 1;
|
| 773 |
subpage_register(subpage, start, end, phys_section_add(section)); |
| 774 |
} |
| 775 |
|
| 776 |
|
| 777 |
static void register_multipage(AddressSpaceDispatch *d, MemoryRegionSection *section) |
| 778 |
{
|
| 779 |
hwaddr start_addr = section->offset_within_address_space; |
| 780 |
ram_addr_t size = section->size; |
| 781 |
hwaddr addr; |
| 782 |
uint16_t section_index = phys_section_add(section); |
| 783 |
|
| 784 |
assert(size); |
| 785 |
|
| 786 |
addr = start_addr; |
| 787 |
phys_page_set(d, addr >> TARGET_PAGE_BITS, size >> TARGET_PAGE_BITS, |
| 788 |
section_index); |
| 789 |
} |
| 790 |
|
| 791 |
QEMU_BUILD_BUG_ON(TARGET_PHYS_ADDR_SPACE_BITS > MAX_PHYS_ADDR_SPACE_BITS) |
| 792 |
|
| 793 |
static MemoryRegionSection limit(MemoryRegionSection section)
|
| 794 |
{
|
| 795 |
section.size = MIN(section.offset_within_address_space + section.size, |
| 796 |
MAX_PHYS_ADDR + 1)
|
| 797 |
- section.offset_within_address_space; |
| 798 |
|
| 799 |
return section;
|
| 800 |
} |
| 801 |
|
| 802 |
static void mem_add(MemoryListener *listener, MemoryRegionSection *section) |
| 803 |
{
|
| 804 |
AddressSpaceDispatch *d = container_of(listener, AddressSpaceDispatch, listener); |
| 805 |
MemoryRegionSection now = limit(*section), remain = limit(*section); |
| 806 |
|
| 807 |
if ((now.offset_within_address_space & ~TARGET_PAGE_MASK)
|
| 808 |
|| (now.size < TARGET_PAGE_SIZE)) {
|
| 809 |
now.size = MIN(TARGET_PAGE_ALIGN(now.offset_within_address_space) |
| 810 |
- now.offset_within_address_space, |
| 811 |
now.size); |
| 812 |
register_subpage(d, &now); |
| 813 |
remain.size -= now.size; |
| 814 |
remain.offset_within_address_space += now.size; |
| 815 |
remain.offset_within_region += now.size; |
| 816 |
} |
| 817 |
while (remain.size >= TARGET_PAGE_SIZE) {
|
| 818 |
now = remain; |
| 819 |
if (remain.offset_within_region & ~TARGET_PAGE_MASK) {
|
| 820 |
now.size = TARGET_PAGE_SIZE; |
| 821 |
register_subpage(d, &now); |
| 822 |
} else {
|
| 823 |
now.size &= TARGET_PAGE_MASK; |
| 824 |
register_multipage(d, &now); |
| 825 |
} |
| 826 |
remain.size -= now.size; |
| 827 |
remain.offset_within_address_space += now.size; |
| 828 |
remain.offset_within_region += now.size; |
| 829 |
} |
| 830 |
now = remain; |
| 831 |
if (now.size) {
|
| 832 |
register_subpage(d, &now); |
| 833 |
} |
| 834 |
} |
| 835 |
|
| 836 |
void qemu_flush_coalesced_mmio_buffer(void) |
| 837 |
{
|
| 838 |
if (kvm_enabled())
|
| 839 |
kvm_flush_coalesced_mmio_buffer(); |
| 840 |
} |
| 841 |
|
| 842 |
void qemu_mutex_lock_ramlist(void) |
| 843 |
{
|
| 844 |
qemu_mutex_lock(&ram_list.mutex); |
| 845 |
} |
| 846 |
|
| 847 |
void qemu_mutex_unlock_ramlist(void) |
| 848 |
{
|
| 849 |
qemu_mutex_unlock(&ram_list.mutex); |
| 850 |
} |
| 851 |
|
| 852 |
#if defined(__linux__) && !defined(TARGET_S390X)
|
| 853 |
|
| 854 |
#include <sys/vfs.h> |
| 855 |
|
| 856 |
#define HUGETLBFS_MAGIC 0x958458f6 |
| 857 |
|
| 858 |
static long gethugepagesize(const char *path) |
| 859 |
{
|
| 860 |
struct statfs fs;
|
| 861 |
int ret;
|
| 862 |
|
| 863 |
do {
|
| 864 |
ret = statfs(path, &fs); |
| 865 |
} while (ret != 0 && errno == EINTR); |
| 866 |
|
| 867 |
if (ret != 0) { |
| 868 |
perror(path); |
| 869 |
return 0; |
| 870 |
} |
| 871 |
|
| 872 |
if (fs.f_type != HUGETLBFS_MAGIC)
|
| 873 |
fprintf(stderr, "Warning: path not on HugeTLBFS: %s\n", path);
|
| 874 |
|
| 875 |
return fs.f_bsize;
|
| 876 |
} |
| 877 |
|
| 878 |
static void *file_ram_alloc(RAMBlock *block, |
| 879 |
ram_addr_t memory, |
| 880 |
const char *path) |
| 881 |
{
|
| 882 |
char *filename;
|
| 883 |
char *sanitized_name;
|
| 884 |
char *c;
|
| 885 |
void *area;
|
| 886 |
int fd;
|
| 887 |
#ifdef MAP_POPULATE
|
| 888 |
int flags;
|
| 889 |
#endif
|
| 890 |
unsigned long hpagesize; |
| 891 |
|
| 892 |
hpagesize = gethugepagesize(path); |
| 893 |
if (!hpagesize) {
|
| 894 |
return NULL; |
| 895 |
} |
| 896 |
|
| 897 |
if (memory < hpagesize) {
|
| 898 |
return NULL; |
| 899 |
} |
| 900 |
|
| 901 |
if (kvm_enabled() && !kvm_has_sync_mmu()) {
|
| 902 |
fprintf(stderr, "host lacks kvm mmu notifiers, -mem-path unsupported\n");
|
| 903 |
return NULL; |
| 904 |
} |
| 905 |
|
| 906 |
/* Make name safe to use with mkstemp by replacing '/' with '_'. */
|
| 907 |
sanitized_name = g_strdup(block->mr->name); |
| 908 |
for (c = sanitized_name; *c != '\0'; c++) { |
| 909 |
if (*c == '/') |
| 910 |
*c = '_';
|
| 911 |
} |
| 912 |
|
| 913 |
filename = g_strdup_printf("%s/qemu_back_mem.%s.XXXXXX", path,
|
| 914 |
sanitized_name); |
| 915 |
g_free(sanitized_name); |
| 916 |
|
| 917 |
fd = mkstemp(filename); |
| 918 |
if (fd < 0) { |
| 919 |
perror("unable to create backing store for hugepages");
|
| 920 |
g_free(filename); |
| 921 |
return NULL; |
| 922 |
} |
| 923 |
unlink(filename); |
| 924 |
g_free(filename); |
| 925 |
|
| 926 |
memory = (memory+hpagesize-1) & ~(hpagesize-1); |
| 927 |
|
| 928 |
/*
|
| 929 |
* ftruncate is not supported by hugetlbfs in older
|
| 930 |
* hosts, so don't bother bailing out on errors.
|
| 931 |
* If anything goes wrong with it under other filesystems,
|
| 932 |
* mmap will fail.
|
| 933 |
*/
|
| 934 |
if (ftruncate(fd, memory))
|
| 935 |
perror("ftruncate");
|
| 936 |
|
| 937 |
#ifdef MAP_POPULATE
|
| 938 |
/* NB: MAP_POPULATE won't exhaustively alloc all phys pages in the case
|
| 939 |
* MAP_PRIVATE is requested. For mem_prealloc we mmap as MAP_SHARED
|
| 940 |
* to sidestep this quirk.
|
| 941 |
*/
|
| 942 |
flags = mem_prealloc ? MAP_POPULATE | MAP_SHARED : MAP_PRIVATE; |
| 943 |
area = mmap(0, memory, PROT_READ | PROT_WRITE, flags, fd, 0); |
| 944 |
#else
|
| 945 |
area = mmap(0, memory, PROT_READ | PROT_WRITE, MAP_PRIVATE, fd, 0); |
| 946 |
#endif
|
| 947 |
if (area == MAP_FAILED) {
|
| 948 |
perror("file_ram_alloc: can't mmap RAM pages");
|
| 949 |
close(fd); |
| 950 |
return (NULL); |
| 951 |
} |
| 952 |
block->fd = fd; |
| 953 |
return area;
|
| 954 |
} |
| 955 |
#endif
|
| 956 |
|
| 957 |
static ram_addr_t find_ram_offset(ram_addr_t size)
|
| 958 |
{
|
| 959 |
RAMBlock *block, *next_block; |
| 960 |
ram_addr_t offset = RAM_ADDR_MAX, mingap = RAM_ADDR_MAX; |
| 961 |
|
| 962 |
assert(size != 0); /* it would hand out same offset multiple times */ |
| 963 |
|
| 964 |
if (QTAILQ_EMPTY(&ram_list.blocks))
|
| 965 |
return 0; |
| 966 |
|
| 967 |
QTAILQ_FOREACH(block, &ram_list.blocks, next) {
|
| 968 |
ram_addr_t end, next = RAM_ADDR_MAX; |
| 969 |
|
| 970 |
end = block->offset + block->length; |
| 971 |
|
| 972 |
QTAILQ_FOREACH(next_block, &ram_list.blocks, next) {
|
| 973 |
if (next_block->offset >= end) {
|
| 974 |
next = MIN(next, next_block->offset); |
| 975 |
} |
| 976 |
} |
| 977 |
if (next - end >= size && next - end < mingap) {
|
| 978 |
offset = end; |
| 979 |
mingap = next - end; |
| 980 |
} |
| 981 |
} |
| 982 |
|
| 983 |
if (offset == RAM_ADDR_MAX) {
|
| 984 |
fprintf(stderr, "Failed to find gap of requested size: %" PRIu64 "\n", |
| 985 |
(uint64_t)size); |
| 986 |
abort(); |
| 987 |
} |
| 988 |
|
| 989 |
return offset;
|
| 990 |
} |
| 991 |
|
| 992 |
ram_addr_t last_ram_offset(void)
|
| 993 |
{
|
| 994 |
RAMBlock *block; |
| 995 |
ram_addr_t last = 0;
|
| 996 |
|
| 997 |
QTAILQ_FOREACH(block, &ram_list.blocks, next) |
| 998 |
last = MAX(last, block->offset + block->length); |
| 999 |
|
| 1000 |
return last;
|
| 1001 |
} |
| 1002 |
|
| 1003 |
static void qemu_ram_setup_dump(void *addr, ram_addr_t size) |
| 1004 |
{
|
| 1005 |
int ret;
|
| 1006 |
QemuOpts *machine_opts; |
| 1007 |
|
| 1008 |
/* Use MADV_DONTDUMP, if user doesn't want the guest memory in the core */
|
| 1009 |
machine_opts = qemu_opts_find(qemu_find_opts("machine"), 0); |
| 1010 |
if (machine_opts &&
|
| 1011 |
!qemu_opt_get_bool(machine_opts, "dump-guest-core", true)) { |
| 1012 |
ret = qemu_madvise(addr, size, QEMU_MADV_DONTDUMP); |
| 1013 |
if (ret) {
|
| 1014 |
perror("qemu_madvise");
|
| 1015 |
fprintf(stderr, "madvise doesn't support MADV_DONTDUMP, "
|
| 1016 |
"but dump_guest_core=off specified\n");
|
| 1017 |
} |
| 1018 |
} |
| 1019 |
} |
| 1020 |
|
| 1021 |
void qemu_ram_set_idstr(ram_addr_t addr, const char *name, DeviceState *dev) |
| 1022 |
{
|
| 1023 |
RAMBlock *new_block, *block; |
| 1024 |
|
| 1025 |
new_block = NULL;
|
| 1026 |
QTAILQ_FOREACH(block, &ram_list.blocks, next) {
|
| 1027 |
if (block->offset == addr) {
|
| 1028 |
new_block = block; |
| 1029 |
break;
|
| 1030 |
} |
| 1031 |
} |
| 1032 |
assert(new_block); |
| 1033 |
assert(!new_block->idstr[0]);
|
| 1034 |
|
| 1035 |
if (dev) {
|
| 1036 |
char *id = qdev_get_dev_path(dev);
|
| 1037 |
if (id) {
|
| 1038 |
snprintf(new_block->idstr, sizeof(new_block->idstr), "%s/", id); |
| 1039 |
g_free(id); |
| 1040 |
} |
| 1041 |
} |
| 1042 |
pstrcat(new_block->idstr, sizeof(new_block->idstr), name);
|
| 1043 |
|
| 1044 |
/* This assumes the iothread lock is taken here too. */
|
| 1045 |
qemu_mutex_lock_ramlist(); |
| 1046 |
QTAILQ_FOREACH(block, &ram_list.blocks, next) {
|
| 1047 |
if (block != new_block && !strcmp(block->idstr, new_block->idstr)) {
|
| 1048 |
fprintf(stderr, "RAMBlock \"%s\" already registered, abort!\n",
|
| 1049 |
new_block->idstr); |
| 1050 |
abort(); |
| 1051 |
} |
| 1052 |
} |
| 1053 |
qemu_mutex_unlock_ramlist(); |
| 1054 |
} |
| 1055 |
|
| 1056 |
static int memory_try_enable_merging(void *addr, size_t len) |
| 1057 |
{
|
| 1058 |
QemuOpts *opts; |
| 1059 |
|
| 1060 |
opts = qemu_opts_find(qemu_find_opts("machine"), 0); |
| 1061 |
if (opts && !qemu_opt_get_bool(opts, "mem-merge", true)) { |
| 1062 |
/* disabled by the user */
|
| 1063 |
return 0; |
| 1064 |
} |
| 1065 |
|
| 1066 |
return qemu_madvise(addr, len, QEMU_MADV_MERGEABLE);
|
| 1067 |
} |
| 1068 |
|
| 1069 |
ram_addr_t qemu_ram_alloc_from_ptr(ram_addr_t size, void *host,
|
| 1070 |
MemoryRegion *mr) |
| 1071 |
{
|
| 1072 |
RAMBlock *block, *new_block; |
| 1073 |
|
| 1074 |
size = TARGET_PAGE_ALIGN(size); |
| 1075 |
new_block = g_malloc0(sizeof(*new_block));
|
| 1076 |
|
| 1077 |
/* This assumes the iothread lock is taken here too. */
|
| 1078 |
qemu_mutex_lock_ramlist(); |
| 1079 |
new_block->mr = mr; |
| 1080 |
new_block->offset = find_ram_offset(size); |
| 1081 |
if (host) {
|
| 1082 |
new_block->host = host; |
| 1083 |
new_block->flags |= RAM_PREALLOC_MASK; |
| 1084 |
} else {
|
| 1085 |
if (mem_path) {
|
| 1086 |
#if defined (__linux__) && !defined(TARGET_S390X)
|
| 1087 |
new_block->host = file_ram_alloc(new_block, size, mem_path); |
| 1088 |
if (!new_block->host) {
|
| 1089 |
new_block->host = qemu_anon_ram_alloc(size); |
| 1090 |
memory_try_enable_merging(new_block->host, size); |
| 1091 |
} |
| 1092 |
#else
|
| 1093 |
fprintf(stderr, "-mem-path option unsupported\n");
|
| 1094 |
exit(1);
|
| 1095 |
#endif
|
| 1096 |
} else {
|
| 1097 |
if (xen_enabled()) {
|
| 1098 |
xen_ram_alloc(new_block->offset, size, mr); |
| 1099 |
} else if (kvm_enabled()) { |
| 1100 |
/* some s390/kvm configurations have special constraints */
|
| 1101 |
new_block->host = kvm_ram_alloc(size); |
| 1102 |
} else {
|
| 1103 |
new_block->host = qemu_anon_ram_alloc(size); |
| 1104 |
} |
| 1105 |
memory_try_enable_merging(new_block->host, size); |
| 1106 |
} |
| 1107 |
} |
| 1108 |
new_block->length = size; |
| 1109 |
|
| 1110 |
/* Keep the list sorted from biggest to smallest block. */
|
| 1111 |
QTAILQ_FOREACH(block, &ram_list.blocks, next) {
|
| 1112 |
if (block->length < new_block->length) {
|
| 1113 |
break;
|
| 1114 |
} |
| 1115 |
} |
| 1116 |
if (block) {
|
| 1117 |
QTAILQ_INSERT_BEFORE(block, new_block, next); |
| 1118 |
} else {
|
| 1119 |
QTAILQ_INSERT_TAIL(&ram_list.blocks, new_block, next); |
| 1120 |
} |
| 1121 |
ram_list.mru_block = NULL;
|
| 1122 |
|
| 1123 |
ram_list.version++; |
| 1124 |
qemu_mutex_unlock_ramlist(); |
| 1125 |
|
| 1126 |
ram_list.phys_dirty = g_realloc(ram_list.phys_dirty, |
| 1127 |
last_ram_offset() >> TARGET_PAGE_BITS); |
| 1128 |
memset(ram_list.phys_dirty + (new_block->offset >> TARGET_PAGE_BITS), |
| 1129 |
0, size >> TARGET_PAGE_BITS);
|
| 1130 |
cpu_physical_memory_set_dirty_range(new_block->offset, size, 0xff);
|
| 1131 |
|
| 1132 |
qemu_ram_setup_dump(new_block->host, size); |
| 1133 |
qemu_madvise(new_block->host, size, QEMU_MADV_HUGEPAGE); |
| 1134 |
|
| 1135 |
if (kvm_enabled())
|
| 1136 |
kvm_setup_guest_memory(new_block->host, size); |
| 1137 |
|
| 1138 |
return new_block->offset;
|
| 1139 |
} |
| 1140 |
|
| 1141 |
ram_addr_t qemu_ram_alloc(ram_addr_t size, MemoryRegion *mr) |
| 1142 |
{
|
| 1143 |
return qemu_ram_alloc_from_ptr(size, NULL, mr); |
| 1144 |
} |
| 1145 |
|
| 1146 |
void qemu_ram_free_from_ptr(ram_addr_t addr)
|
| 1147 |
{
|
| 1148 |
RAMBlock *block; |
| 1149 |
|
| 1150 |
/* This assumes the iothread lock is taken here too. */
|
| 1151 |
qemu_mutex_lock_ramlist(); |
| 1152 |
QTAILQ_FOREACH(block, &ram_list.blocks, next) {
|
| 1153 |
if (addr == block->offset) {
|
| 1154 |
QTAILQ_REMOVE(&ram_list.blocks, block, next); |
| 1155 |
ram_list.mru_block = NULL;
|
| 1156 |
ram_list.version++; |
| 1157 |
g_free(block); |
| 1158 |
break;
|
| 1159 |
} |
| 1160 |
} |
| 1161 |
qemu_mutex_unlock_ramlist(); |
| 1162 |
} |
| 1163 |
|
| 1164 |
void qemu_ram_free(ram_addr_t addr)
|
| 1165 |
{
|
| 1166 |
RAMBlock *block; |
| 1167 |
|
| 1168 |
/* This assumes the iothread lock is taken here too. */
|
| 1169 |
qemu_mutex_lock_ramlist(); |
| 1170 |
QTAILQ_FOREACH(block, &ram_list.blocks, next) {
|
| 1171 |
if (addr == block->offset) {
|
| 1172 |
QTAILQ_REMOVE(&ram_list.blocks, block, next); |
| 1173 |
ram_list.mru_block = NULL;
|
| 1174 |
ram_list.version++; |
| 1175 |
if (block->flags & RAM_PREALLOC_MASK) {
|
| 1176 |
; |
| 1177 |
} else if (mem_path) { |
| 1178 |
#if defined (__linux__) && !defined(TARGET_S390X)
|
| 1179 |
if (block->fd) {
|
| 1180 |
munmap(block->host, block->length); |
| 1181 |
close(block->fd); |
| 1182 |
} else {
|
| 1183 |
qemu_anon_ram_free(block->host, block->length); |
| 1184 |
} |
| 1185 |
#else
|
| 1186 |
abort(); |
| 1187 |
#endif
|
| 1188 |
} else {
|
| 1189 |
if (xen_enabled()) {
|
| 1190 |
xen_invalidate_map_cache_entry(block->host); |
| 1191 |
} else {
|
| 1192 |
qemu_anon_ram_free(block->host, block->length); |
| 1193 |
} |
| 1194 |
} |
| 1195 |
g_free(block); |
| 1196 |
break;
|
| 1197 |
} |
| 1198 |
} |
| 1199 |
qemu_mutex_unlock_ramlist(); |
| 1200 |
|
| 1201 |
} |
| 1202 |
|
| 1203 |
#ifndef _WIN32
|
| 1204 |
void qemu_ram_remap(ram_addr_t addr, ram_addr_t length)
|
| 1205 |
{
|
| 1206 |
RAMBlock *block; |
| 1207 |
ram_addr_t offset; |
| 1208 |
int flags;
|
| 1209 |
void *area, *vaddr;
|
| 1210 |
|
| 1211 |
QTAILQ_FOREACH(block, &ram_list.blocks, next) {
|
| 1212 |
offset = addr - block->offset; |
| 1213 |
if (offset < block->length) {
|
| 1214 |
vaddr = block->host + offset; |
| 1215 |
if (block->flags & RAM_PREALLOC_MASK) {
|
| 1216 |
; |
| 1217 |
} else {
|
| 1218 |
flags = MAP_FIXED; |
| 1219 |
munmap(vaddr, length); |
| 1220 |
if (mem_path) {
|
| 1221 |
#if defined(__linux__) && !defined(TARGET_S390X)
|
| 1222 |
if (block->fd) {
|
| 1223 |
#ifdef MAP_POPULATE
|
| 1224 |
flags |= mem_prealloc ? MAP_POPULATE | MAP_SHARED : |
| 1225 |
MAP_PRIVATE; |
| 1226 |
#else
|
| 1227 |
flags |= MAP_PRIVATE; |
| 1228 |
#endif
|
| 1229 |
area = mmap(vaddr, length, PROT_READ | PROT_WRITE, |
| 1230 |
flags, block->fd, offset); |
| 1231 |
} else {
|
| 1232 |
flags |= MAP_PRIVATE | MAP_ANONYMOUS; |
| 1233 |
area = mmap(vaddr, length, PROT_READ | PROT_WRITE, |
| 1234 |
flags, -1, 0); |
| 1235 |
} |
| 1236 |
#else
|
| 1237 |
abort(); |
| 1238 |
#endif
|
| 1239 |
} else {
|
| 1240 |
#if defined(TARGET_S390X) && defined(CONFIG_KVM)
|
| 1241 |
flags |= MAP_SHARED | MAP_ANONYMOUS; |
| 1242 |
area = mmap(vaddr, length, PROT_EXEC|PROT_READ|PROT_WRITE, |
| 1243 |
flags, -1, 0); |
| 1244 |
#else
|
| 1245 |
flags |= MAP_PRIVATE | MAP_ANONYMOUS; |
| 1246 |
area = mmap(vaddr, length, PROT_READ | PROT_WRITE, |
| 1247 |
flags, -1, 0); |
| 1248 |
#endif
|
| 1249 |
} |
| 1250 |
if (area != vaddr) {
|
| 1251 |
fprintf(stderr, "Could not remap addr: "
|
| 1252 |
RAM_ADDR_FMT "@" RAM_ADDR_FMT "\n", |
| 1253 |
length, addr); |
| 1254 |
exit(1);
|
| 1255 |
} |
| 1256 |
memory_try_enable_merging(vaddr, length); |
| 1257 |
qemu_ram_setup_dump(vaddr, length); |
| 1258 |
} |
| 1259 |
return;
|
| 1260 |
} |
| 1261 |
} |
| 1262 |
} |
| 1263 |
#endif /* !_WIN32 */ |
| 1264 |
|
| 1265 |
/* Return a host pointer to ram allocated with qemu_ram_alloc.
|
| 1266 |
With the exception of the softmmu code in this file, this should
|
| 1267 |
only be used for local memory (e.g. video ram) that the device owns,
|
| 1268 |
and knows it isn't going to access beyond the end of the block.
|
| 1269 |
|
| 1270 |
It should not be used for general purpose DMA.
|
| 1271 |
Use cpu_physical_memory_map/cpu_physical_memory_rw instead.
|
| 1272 |
*/
|
| 1273 |
void *qemu_get_ram_ptr(ram_addr_t addr)
|
| 1274 |
{
|
| 1275 |
RAMBlock *block; |
| 1276 |
|
| 1277 |
/* The list is protected by the iothread lock here. */
|
| 1278 |
block = ram_list.mru_block; |
| 1279 |
if (block && addr - block->offset < block->length) {
|
| 1280 |
goto found;
|
| 1281 |
} |
| 1282 |
QTAILQ_FOREACH(block, &ram_list.blocks, next) {
|
| 1283 |
if (addr - block->offset < block->length) {
|
| 1284 |
goto found;
|
| 1285 |
} |
| 1286 |
} |
| 1287 |
|
| 1288 |
fprintf(stderr, "Bad ram offset %" PRIx64 "\n", (uint64_t)addr); |
| 1289 |
abort(); |
| 1290 |
|
| 1291 |
found:
|
| 1292 |
ram_list.mru_block = block; |
| 1293 |
if (xen_enabled()) {
|
| 1294 |
/* We need to check if the requested address is in the RAM
|
| 1295 |
* because we don't want to map the entire memory in QEMU.
|
| 1296 |
* In that case just map until the end of the page.
|
| 1297 |
*/
|
| 1298 |
if (block->offset == 0) { |
| 1299 |
return xen_map_cache(addr, 0, 0); |
| 1300 |
} else if (block->host == NULL) { |
| 1301 |
block->host = |
| 1302 |
xen_map_cache(block->offset, block->length, 1);
|
| 1303 |
} |
| 1304 |
} |
| 1305 |
return block->host + (addr - block->offset);
|
| 1306 |
} |
| 1307 |
|
| 1308 |
/* Return a host pointer to ram allocated with qemu_ram_alloc. Same as
|
| 1309 |
* qemu_get_ram_ptr but do not touch ram_list.mru_block.
|
| 1310 |
*
|
| 1311 |
* ??? Is this still necessary?
|
| 1312 |
*/
|
| 1313 |
static void *qemu_safe_ram_ptr(ram_addr_t addr) |
| 1314 |
{
|
| 1315 |
RAMBlock *block; |
| 1316 |
|
| 1317 |
/* The list is protected by the iothread lock here. */
|
| 1318 |
QTAILQ_FOREACH(block, &ram_list.blocks, next) {
|
| 1319 |
if (addr - block->offset < block->length) {
|
| 1320 |
if (xen_enabled()) {
|
| 1321 |
/* We need to check if the requested address is in the RAM
|
| 1322 |
* because we don't want to map the entire memory in QEMU.
|
| 1323 |
* In that case just map until the end of the page.
|
| 1324 |
*/
|
| 1325 |
if (block->offset == 0) { |
| 1326 |
return xen_map_cache(addr, 0, 0); |
| 1327 |
} else if (block->host == NULL) { |
| 1328 |
block->host = |
| 1329 |
xen_map_cache(block->offset, block->length, 1);
|
| 1330 |
} |
| 1331 |
} |
| 1332 |
return block->host + (addr - block->offset);
|
| 1333 |
} |
| 1334 |
} |
| 1335 |
|
| 1336 |
fprintf(stderr, "Bad ram offset %" PRIx64 "\n", (uint64_t)addr); |
| 1337 |
abort(); |
| 1338 |
|
| 1339 |
return NULL; |
| 1340 |
} |
| 1341 |
|
| 1342 |
/* Return a host pointer to guest's ram. Similar to qemu_get_ram_ptr
|
| 1343 |
* but takes a size argument */
|
| 1344 |
static void *qemu_ram_ptr_length(ram_addr_t addr, ram_addr_t *size) |
| 1345 |
{
|
| 1346 |
if (*size == 0) { |
| 1347 |
return NULL; |
| 1348 |
} |
| 1349 |
if (xen_enabled()) {
|
| 1350 |
return xen_map_cache(addr, *size, 1); |
| 1351 |
} else {
|
| 1352 |
RAMBlock *block; |
| 1353 |
|
| 1354 |
QTAILQ_FOREACH(block, &ram_list.blocks, next) {
|
| 1355 |
if (addr - block->offset < block->length) {
|
| 1356 |
if (addr - block->offset + *size > block->length)
|
| 1357 |
*size = block->length - addr + block->offset; |
| 1358 |
return block->host + (addr - block->offset);
|
| 1359 |
} |
| 1360 |
} |
| 1361 |
|
| 1362 |
fprintf(stderr, "Bad ram offset %" PRIx64 "\n", (uint64_t)addr); |
| 1363 |
abort(); |
| 1364 |
} |
| 1365 |
} |
| 1366 |
|
| 1367 |
int qemu_ram_addr_from_host(void *ptr, ram_addr_t *ram_addr) |
| 1368 |
{
|
| 1369 |
RAMBlock *block; |
| 1370 |
uint8_t *host = ptr; |
| 1371 |
|
| 1372 |
if (xen_enabled()) {
|
| 1373 |
*ram_addr = xen_ram_addr_from_mapcache(ptr); |
| 1374 |
return 0; |
| 1375 |
} |
| 1376 |
|
| 1377 |
QTAILQ_FOREACH(block, &ram_list.blocks, next) {
|
| 1378 |
/* This case append when the block is not mapped. */
|
| 1379 |
if (block->host == NULL) { |
| 1380 |
continue;
|
| 1381 |
} |
| 1382 |
if (host - block->host < block->length) {
|
| 1383 |
*ram_addr = block->offset + (host - block->host); |
| 1384 |
return 0; |
| 1385 |
} |
| 1386 |
} |
| 1387 |
|
| 1388 |
return -1; |
| 1389 |
} |
| 1390 |
|
| 1391 |
/* Some of the softmmu routines need to translate from a host pointer
|
| 1392 |
(typically a TLB entry) back to a ram offset. */
|
| 1393 |
ram_addr_t qemu_ram_addr_from_host_nofail(void *ptr)
|
| 1394 |
{
|
| 1395 |
ram_addr_t ram_addr; |
| 1396 |
|
| 1397 |
if (qemu_ram_addr_from_host(ptr, &ram_addr)) {
|
| 1398 |
fprintf(stderr, "Bad ram pointer %p\n", ptr);
|
| 1399 |
abort(); |
| 1400 |
} |
| 1401 |
return ram_addr;
|
| 1402 |
} |
| 1403 |
|
| 1404 |
static void notdirty_mem_write(void *opaque, hwaddr ram_addr, |
| 1405 |
uint64_t val, unsigned size)
|
| 1406 |
{
|
| 1407 |
int dirty_flags;
|
| 1408 |
dirty_flags = cpu_physical_memory_get_dirty_flags(ram_addr); |
| 1409 |
if (!(dirty_flags & CODE_DIRTY_FLAG)) {
|
| 1410 |
tb_invalidate_phys_page_fast(ram_addr, size); |
| 1411 |
dirty_flags = cpu_physical_memory_get_dirty_flags(ram_addr); |
| 1412 |
} |
| 1413 |
switch (size) {
|
| 1414 |
case 1: |
| 1415 |
stb_p(qemu_get_ram_ptr(ram_addr), val); |
| 1416 |
break;
|
| 1417 |
case 2: |
| 1418 |
stw_p(qemu_get_ram_ptr(ram_addr), val); |
| 1419 |
break;
|
| 1420 |
case 4: |
| 1421 |
stl_p(qemu_get_ram_ptr(ram_addr), val); |
| 1422 |
break;
|
| 1423 |
default:
|
| 1424 |
abort(); |
| 1425 |
} |
| 1426 |
dirty_flags |= (0xff & ~CODE_DIRTY_FLAG);
|
| 1427 |
cpu_physical_memory_set_dirty_flags(ram_addr, dirty_flags); |
| 1428 |
/* we remove the notdirty callback only if the code has been
|
| 1429 |
flushed */
|
| 1430 |
if (dirty_flags == 0xff) |
| 1431 |
tlb_set_dirty(cpu_single_env, cpu_single_env->mem_io_vaddr); |
| 1432 |
} |
| 1433 |
|
| 1434 |
static bool notdirty_mem_accepts(void *opaque, hwaddr addr, |
| 1435 |
unsigned size, bool is_write) |
| 1436 |
{
|
| 1437 |
return is_write;
|
| 1438 |
} |
| 1439 |
|
| 1440 |
static const MemoryRegionOps notdirty_mem_ops = { |
| 1441 |
.write = notdirty_mem_write, |
| 1442 |
.valid.accepts = notdirty_mem_accepts, |
| 1443 |
.endianness = DEVICE_NATIVE_ENDIAN, |
| 1444 |
}; |
| 1445 |
|
| 1446 |
/* Generate a debug exception if a watchpoint has been hit. */
|
| 1447 |
static void check_watchpoint(int offset, int len_mask, int flags) |
| 1448 |
{
|
| 1449 |
CPUArchState *env = cpu_single_env; |
| 1450 |
target_ulong pc, cs_base; |
| 1451 |
target_ulong vaddr; |
| 1452 |
CPUWatchpoint *wp; |
| 1453 |
int cpu_flags;
|
| 1454 |
|
| 1455 |
if (env->watchpoint_hit) {
|
| 1456 |
/* We re-entered the check after replacing the TB. Now raise
|
| 1457 |
* the debug interrupt so that is will trigger after the
|
| 1458 |
* current instruction. */
|
| 1459 |
cpu_interrupt(ENV_GET_CPU(env), CPU_INTERRUPT_DEBUG); |
| 1460 |
return;
|
| 1461 |
} |
| 1462 |
vaddr = (env->mem_io_vaddr & TARGET_PAGE_MASK) + offset; |
| 1463 |
QTAILQ_FOREACH(wp, &env->watchpoints, entry) {
|
| 1464 |
if ((vaddr == (wp->vaddr & len_mask) ||
|
| 1465 |
(vaddr & wp->len_mask) == wp->vaddr) && (wp->flags & flags)) {
|
| 1466 |
wp->flags |= BP_WATCHPOINT_HIT; |
| 1467 |
if (!env->watchpoint_hit) {
|
| 1468 |
env->watchpoint_hit = wp; |
| 1469 |
tb_check_watchpoint(env); |
| 1470 |
if (wp->flags & BP_STOP_BEFORE_ACCESS) {
|
| 1471 |
env->exception_index = EXCP_DEBUG; |
| 1472 |
cpu_loop_exit(env); |
| 1473 |
} else {
|
| 1474 |
cpu_get_tb_cpu_state(env, &pc, &cs_base, &cpu_flags); |
| 1475 |
tb_gen_code(env, pc, cs_base, cpu_flags, 1);
|
| 1476 |
cpu_resume_from_signal(env, NULL);
|
| 1477 |
} |
| 1478 |
} |
| 1479 |
} else {
|
| 1480 |
wp->flags &= ~BP_WATCHPOINT_HIT; |
| 1481 |
} |
| 1482 |
} |
| 1483 |
} |
| 1484 |
|
| 1485 |
/* Watchpoint access routines. Watchpoints are inserted using TLB tricks,
|
| 1486 |
so these check for a hit then pass through to the normal out-of-line
|
| 1487 |
phys routines. */
|
| 1488 |
static uint64_t watch_mem_read(void *opaque, hwaddr addr, |
| 1489 |
unsigned size)
|
| 1490 |
{
|
| 1491 |
check_watchpoint(addr & ~TARGET_PAGE_MASK, ~(size - 1), BP_MEM_READ);
|
| 1492 |
switch (size) {
|
| 1493 |
case 1: return ldub_phys(addr); |
| 1494 |
case 2: return lduw_phys(addr); |
| 1495 |
case 4: return ldl_phys(addr); |
| 1496 |
default: abort();
|
| 1497 |
} |
| 1498 |
} |
| 1499 |
|
| 1500 |
static void watch_mem_write(void *opaque, hwaddr addr, |
| 1501 |
uint64_t val, unsigned size)
|
| 1502 |
{
|
| 1503 |
check_watchpoint(addr & ~TARGET_PAGE_MASK, ~(size - 1), BP_MEM_WRITE);
|
| 1504 |
switch (size) {
|
| 1505 |
case 1: |
| 1506 |
stb_phys(addr, val); |
| 1507 |
break;
|
| 1508 |
case 2: |
| 1509 |
stw_phys(addr, val); |
| 1510 |
break;
|
| 1511 |
case 4: |
| 1512 |
stl_phys(addr, val); |
| 1513 |
break;
|
| 1514 |
default: abort();
|
| 1515 |
} |
| 1516 |
} |
| 1517 |
|
| 1518 |
static const MemoryRegionOps watch_mem_ops = { |
| 1519 |
.read = watch_mem_read, |
| 1520 |
.write = watch_mem_write, |
| 1521 |
.endianness = DEVICE_NATIVE_ENDIAN, |
| 1522 |
}; |
| 1523 |
|
| 1524 |
static uint64_t subpage_read(void *opaque, hwaddr addr, |
| 1525 |
unsigned len)
|
| 1526 |
{
|
| 1527 |
subpage_t *mmio = opaque; |
| 1528 |
unsigned int idx = SUBPAGE_IDX(addr); |
| 1529 |
MemoryRegionSection *section; |
| 1530 |
#if defined(DEBUG_SUBPAGE)
|
| 1531 |
printf("%s: subpage %p len %d addr " TARGET_FMT_plx " idx %d\n", __func__, |
| 1532 |
mmio, len, addr, idx); |
| 1533 |
#endif
|
| 1534 |
|
| 1535 |
section = &phys_sections[mmio->sub_section[idx]]; |
| 1536 |
addr += mmio->base; |
| 1537 |
addr -= section->offset_within_address_space; |
| 1538 |
addr += section->offset_within_region; |
| 1539 |
return io_mem_read(section->mr, addr, len);
|
| 1540 |
} |
| 1541 |
|
| 1542 |
static void subpage_write(void *opaque, hwaddr addr, |
| 1543 |
uint64_t value, unsigned len)
|
| 1544 |
{
|
| 1545 |
subpage_t *mmio = opaque; |
| 1546 |
unsigned int idx = SUBPAGE_IDX(addr); |
| 1547 |
MemoryRegionSection *section; |
| 1548 |
#if defined(DEBUG_SUBPAGE)
|
| 1549 |
printf("%s: subpage %p len %d addr " TARGET_FMT_plx
|
| 1550 |
" idx %d value %"PRIx64"\n", |
| 1551 |
__func__, mmio, len, addr, idx, value); |
| 1552 |
#endif
|
| 1553 |
|
| 1554 |
section = &phys_sections[mmio->sub_section[idx]]; |
| 1555 |
addr += mmio->base; |
| 1556 |
addr -= section->offset_within_address_space; |
| 1557 |
addr += section->offset_within_region; |
| 1558 |
io_mem_write(section->mr, addr, value, len); |
| 1559 |
} |
| 1560 |
|
| 1561 |
static bool subpage_accepts(void *opaque, hwaddr addr, |
| 1562 |
unsigned size, bool is_write) |
| 1563 |
{
|
| 1564 |
subpage_t *mmio = opaque; |
| 1565 |
unsigned int idx = SUBPAGE_IDX(addr); |
| 1566 |
MemoryRegionSection *section; |
| 1567 |
#if defined(DEBUG_SUBPAGE)
|
| 1568 |
printf("%s: subpage %p %c len %d addr " TARGET_FMT_plx
|
| 1569 |
" idx %d\n", __func__, mmio,
|
| 1570 |
is_write ? 'w' : 'r', len, addr, idx); |
| 1571 |
#endif
|
| 1572 |
|
| 1573 |
section = &phys_sections[mmio->sub_section[idx]]; |
| 1574 |
addr += mmio->base; |
| 1575 |
addr -= section->offset_within_address_space; |
| 1576 |
addr += section->offset_within_region; |
| 1577 |
return memory_region_access_valid(section->mr, addr, size, is_write);
|
| 1578 |
} |
| 1579 |
|
| 1580 |
static const MemoryRegionOps subpage_ops = { |
| 1581 |
.read = subpage_read, |
| 1582 |
.write = subpage_write, |
| 1583 |
.valid.accepts = subpage_accepts, |
| 1584 |
.endianness = DEVICE_NATIVE_ENDIAN, |
| 1585 |
}; |
| 1586 |
|
| 1587 |
static uint64_t subpage_ram_read(void *opaque, hwaddr addr, |
| 1588 |
unsigned size)
|
| 1589 |
{
|
| 1590 |
ram_addr_t raddr = addr; |
| 1591 |
void *ptr = qemu_get_ram_ptr(raddr);
|
| 1592 |
switch (size) {
|
| 1593 |
case 1: return ldub_p(ptr); |
| 1594 |
case 2: return lduw_p(ptr); |
| 1595 |
case 4: return ldl_p(ptr); |
| 1596 |
default: abort();
|
| 1597 |
} |
| 1598 |
} |
| 1599 |
|
| 1600 |
static void subpage_ram_write(void *opaque, hwaddr addr, |
| 1601 |
uint64_t value, unsigned size)
|
| 1602 |
{
|
| 1603 |
ram_addr_t raddr = addr; |
| 1604 |
void *ptr = qemu_get_ram_ptr(raddr);
|
| 1605 |
switch (size) {
|
| 1606 |
case 1: return stb_p(ptr, value); |
| 1607 |
case 2: return stw_p(ptr, value); |
| 1608 |
case 4: return stl_p(ptr, value); |
| 1609 |
default: abort();
|
| 1610 |
} |
| 1611 |
} |
| 1612 |
|
| 1613 |
static const MemoryRegionOps subpage_ram_ops = { |
| 1614 |
.read = subpage_ram_read, |
| 1615 |
.write = subpage_ram_write, |
| 1616 |
.endianness = DEVICE_NATIVE_ENDIAN, |
| 1617 |
}; |
| 1618 |
|
| 1619 |
static int subpage_register (subpage_t *mmio, uint32_t start, uint32_t end, |
| 1620 |
uint16_t section) |
| 1621 |
{
|
| 1622 |
int idx, eidx;
|
| 1623 |
|
| 1624 |
if (start >= TARGET_PAGE_SIZE || end >= TARGET_PAGE_SIZE)
|
| 1625 |
return -1; |
| 1626 |
idx = SUBPAGE_IDX(start); |
| 1627 |
eidx = SUBPAGE_IDX(end); |
| 1628 |
#if defined(DEBUG_SUBPAGE)
|
| 1629 |
printf("%s: %p start %08x end %08x idx %08x eidx %08x mem %ld\n", __func__,
|
| 1630 |
mmio, start, end, idx, eidx, memory); |
| 1631 |
#endif
|
| 1632 |
if (memory_region_is_ram(phys_sections[section].mr)) {
|
| 1633 |
MemoryRegionSection new_section = phys_sections[section]; |
| 1634 |
new_section.mr = &io_mem_subpage_ram; |
| 1635 |
section = phys_section_add(&new_section); |
| 1636 |
} |
| 1637 |
for (; idx <= eidx; idx++) {
|
| 1638 |
mmio->sub_section[idx] = section; |
| 1639 |
} |
| 1640 |
|
| 1641 |
return 0; |
| 1642 |
} |
| 1643 |
|
| 1644 |
static subpage_t *subpage_init(hwaddr base)
|
| 1645 |
{
|
| 1646 |
subpage_t *mmio; |
| 1647 |
|
| 1648 |
mmio = g_malloc0(sizeof(subpage_t));
|
| 1649 |
|
| 1650 |
mmio->base = base; |
| 1651 |
memory_region_init_io(&mmio->iomem, &subpage_ops, mmio, |
| 1652 |
"subpage", TARGET_PAGE_SIZE);
|
| 1653 |
mmio->iomem.subpage = true;
|
| 1654 |
#if defined(DEBUG_SUBPAGE)
|
| 1655 |
printf("%s: %p base " TARGET_FMT_plx " len %08x %d\n", __func__, |
| 1656 |
mmio, base, TARGET_PAGE_SIZE, subpage_memory); |
| 1657 |
#endif
|
| 1658 |
subpage_register(mmio, 0, TARGET_PAGE_SIZE-1, phys_section_unassigned); |
| 1659 |
|
| 1660 |
return mmio;
|
| 1661 |
} |
| 1662 |
|
| 1663 |
static uint16_t dummy_section(MemoryRegion *mr)
|
| 1664 |
{
|
| 1665 |
MemoryRegionSection section = {
|
| 1666 |
.mr = mr, |
| 1667 |
.offset_within_address_space = 0,
|
| 1668 |
.offset_within_region = 0,
|
| 1669 |
.size = UINT64_MAX, |
| 1670 |
}; |
| 1671 |
|
| 1672 |
return phys_section_add(§ion);
|
| 1673 |
} |
| 1674 |
|
| 1675 |
MemoryRegion *iotlb_to_region(hwaddr index) |
| 1676 |
{
|
| 1677 |
return phys_sections[index & ~TARGET_PAGE_MASK].mr;
|
| 1678 |
} |
| 1679 |
|
| 1680 |
static void io_mem_init(void) |
| 1681 |
{
|
| 1682 |
memory_region_init_io(&io_mem_rom, &unassigned_mem_ops, NULL, "rom", UINT64_MAX); |
| 1683 |
memory_region_init_io(&io_mem_unassigned, &unassigned_mem_ops, NULL,
|
| 1684 |
"unassigned", UINT64_MAX);
|
| 1685 |
memory_region_init_io(&io_mem_notdirty, ¬dirty_mem_ops, NULL,
|
| 1686 |
"notdirty", UINT64_MAX);
|
| 1687 |
memory_region_init_io(&io_mem_subpage_ram, &subpage_ram_ops, NULL,
|
| 1688 |
"subpage-ram", UINT64_MAX);
|
| 1689 |
memory_region_init_io(&io_mem_watch, &watch_mem_ops, NULL,
|
| 1690 |
"watch", UINT64_MAX);
|
| 1691 |
} |
| 1692 |
|
| 1693 |
static void mem_begin(MemoryListener *listener) |
| 1694 |
{
|
| 1695 |
AddressSpaceDispatch *d = container_of(listener, AddressSpaceDispatch, listener); |
| 1696 |
|
| 1697 |
destroy_all_mappings(d); |
| 1698 |
d->phys_map.ptr = PHYS_MAP_NODE_NIL; |
| 1699 |
} |
| 1700 |
|
| 1701 |
static void core_begin(MemoryListener *listener) |
| 1702 |
{
|
| 1703 |
phys_sections_clear(); |
| 1704 |
phys_section_unassigned = dummy_section(&io_mem_unassigned); |
| 1705 |
phys_section_notdirty = dummy_section(&io_mem_notdirty); |
| 1706 |
phys_section_rom = dummy_section(&io_mem_rom); |
| 1707 |
phys_section_watch = dummy_section(&io_mem_watch); |
| 1708 |
} |
| 1709 |
|
| 1710 |
static void tcg_commit(MemoryListener *listener) |
| 1711 |
{
|
| 1712 |
CPUArchState *env; |
| 1713 |
|
| 1714 |
/* since each CPU stores ram addresses in its TLB cache, we must
|
| 1715 |
reset the modified entries */
|
| 1716 |
/* XXX: slow ! */
|
| 1717 |
for(env = first_cpu; env != NULL; env = env->next_cpu) { |
| 1718 |
tlb_flush(env, 1);
|
| 1719 |
} |
| 1720 |
} |
| 1721 |
|
| 1722 |
static void core_log_global_start(MemoryListener *listener) |
| 1723 |
{
|
| 1724 |
cpu_physical_memory_set_dirty_tracking(1);
|
| 1725 |
} |
| 1726 |
|
| 1727 |
static void core_log_global_stop(MemoryListener *listener) |
| 1728 |
{
|
| 1729 |
cpu_physical_memory_set_dirty_tracking(0);
|
| 1730 |
} |
| 1731 |
|
| 1732 |
static void io_region_add(MemoryListener *listener, |
| 1733 |
MemoryRegionSection *section) |
| 1734 |
{
|
| 1735 |
MemoryRegionIORange *mrio = g_new(MemoryRegionIORange, 1);
|
| 1736 |
|
| 1737 |
mrio->mr = section->mr; |
| 1738 |
mrio->offset = section->offset_within_region; |
| 1739 |
iorange_init(&mrio->iorange, &memory_region_iorange_ops, |
| 1740 |
section->offset_within_address_space, section->size); |
| 1741 |
ioport_register(&mrio->iorange); |
| 1742 |
} |
| 1743 |
|
| 1744 |
static void io_region_del(MemoryListener *listener, |
| 1745 |
MemoryRegionSection *section) |
| 1746 |
{
|
| 1747 |
isa_unassign_ioport(section->offset_within_address_space, section->size); |
| 1748 |
} |
| 1749 |
|
| 1750 |
static MemoryListener core_memory_listener = {
|
| 1751 |
.begin = core_begin, |
| 1752 |
.log_global_start = core_log_global_start, |
| 1753 |
.log_global_stop = core_log_global_stop, |
| 1754 |
.priority = 1,
|
| 1755 |
}; |
| 1756 |
|
| 1757 |
static MemoryListener io_memory_listener = {
|
| 1758 |
.region_add = io_region_add, |
| 1759 |
.region_del = io_region_del, |
| 1760 |
.priority = 0,
|
| 1761 |
}; |
| 1762 |
|
| 1763 |
static MemoryListener tcg_memory_listener = {
|
| 1764 |
.commit = tcg_commit, |
| 1765 |
}; |
| 1766 |
|
| 1767 |
void address_space_init_dispatch(AddressSpace *as)
|
| 1768 |
{
|
| 1769 |
AddressSpaceDispatch *d = g_new(AddressSpaceDispatch, 1);
|
| 1770 |
|
| 1771 |
d->phys_map = (PhysPageEntry) { .ptr = PHYS_MAP_NODE_NIL, .is_leaf = 0 };
|
| 1772 |
d->listener = (MemoryListener) {
|
| 1773 |
.begin = mem_begin, |
| 1774 |
.region_add = mem_add, |
| 1775 |
.region_nop = mem_add, |
| 1776 |
.priority = 0,
|
| 1777 |
}; |
| 1778 |
as->dispatch = d; |
| 1779 |
memory_listener_register(&d->listener, as); |
| 1780 |
} |
| 1781 |
|
| 1782 |
void address_space_destroy_dispatch(AddressSpace *as)
|
| 1783 |
{
|
| 1784 |
AddressSpaceDispatch *d = as->dispatch; |
| 1785 |
|
| 1786 |
memory_listener_unregister(&d->listener); |
| 1787 |
destroy_l2_mapping(&d->phys_map, P_L2_LEVELS - 1);
|
| 1788 |
g_free(d); |
| 1789 |
as->dispatch = NULL;
|
| 1790 |
} |
| 1791 |
|
| 1792 |
static void memory_map_init(void) |
| 1793 |
{
|
| 1794 |
system_memory = g_malloc(sizeof(*system_memory));
|
| 1795 |
memory_region_init(system_memory, "system", INT64_MAX);
|
| 1796 |
address_space_init(&address_space_memory, system_memory); |
| 1797 |
address_space_memory.name = "memory";
|
| 1798 |
|
| 1799 |
system_io = g_malloc(sizeof(*system_io));
|
| 1800 |
memory_region_init(system_io, "io", 65536); |
| 1801 |
address_space_init(&address_space_io, system_io); |
| 1802 |
address_space_io.name = "I/O";
|
| 1803 |
|
| 1804 |
memory_listener_register(&core_memory_listener, &address_space_memory); |
| 1805 |
memory_listener_register(&io_memory_listener, &address_space_io); |
| 1806 |
memory_listener_register(&tcg_memory_listener, &address_space_memory); |
| 1807 |
|
| 1808 |
dma_context_init(&dma_context_memory, &address_space_memory, |
| 1809 |
NULL, NULL, NULL); |
| 1810 |
} |
| 1811 |
|
| 1812 |
MemoryRegion *get_system_memory(void)
|
| 1813 |
{
|
| 1814 |
return system_memory;
|
| 1815 |
} |
| 1816 |
|
| 1817 |
MemoryRegion *get_system_io(void)
|
| 1818 |
{
|
| 1819 |
return system_io;
|
| 1820 |
} |
| 1821 |
|
| 1822 |
#endif /* !defined(CONFIG_USER_ONLY) */ |
| 1823 |
|
| 1824 |
/* physical memory access (slow version, mainly for debug) */
|
| 1825 |
#if defined(CONFIG_USER_ONLY)
|
| 1826 |
int cpu_memory_rw_debug(CPUArchState *env, target_ulong addr,
|
| 1827 |
uint8_t *buf, int len, int is_write) |
| 1828 |
{
|
| 1829 |
int l, flags;
|
| 1830 |
target_ulong page; |
| 1831 |
void * p;
|
| 1832 |
|
| 1833 |
while (len > 0) { |
| 1834 |
page = addr & TARGET_PAGE_MASK; |
| 1835 |
l = (page + TARGET_PAGE_SIZE) - addr; |
| 1836 |
if (l > len)
|
| 1837 |
l = len; |
| 1838 |
flags = page_get_flags(page); |
| 1839 |
if (!(flags & PAGE_VALID))
|
| 1840 |
return -1; |
| 1841 |
if (is_write) {
|
| 1842 |
if (!(flags & PAGE_WRITE))
|
| 1843 |
return -1; |
| 1844 |
/* XXX: this code should not depend on lock_user */
|
| 1845 |
if (!(p = lock_user(VERIFY_WRITE, addr, l, 0))) |
| 1846 |
return -1; |
| 1847 |
memcpy(p, buf, l); |
| 1848 |
unlock_user(p, addr, l); |
| 1849 |
} else {
|
| 1850 |
if (!(flags & PAGE_READ))
|
| 1851 |
return -1; |
| 1852 |
/* XXX: this code should not depend on lock_user */
|
| 1853 |
if (!(p = lock_user(VERIFY_READ, addr, l, 1))) |
| 1854 |
return -1; |
| 1855 |
memcpy(buf, p, l); |
| 1856 |
unlock_user(p, addr, 0);
|
| 1857 |
} |
| 1858 |
len -= l; |
| 1859 |
buf += l; |
| 1860 |
addr += l; |
| 1861 |
} |
| 1862 |
return 0; |
| 1863 |
} |
| 1864 |
|
| 1865 |
#else
|
| 1866 |
|
| 1867 |
static void invalidate_and_set_dirty(hwaddr addr, |
| 1868 |
hwaddr length) |
| 1869 |
{
|
| 1870 |
if (!cpu_physical_memory_is_dirty(addr)) {
|
| 1871 |
/* invalidate code */
|
| 1872 |
tb_invalidate_phys_page_range(addr, addr + length, 0);
|
| 1873 |
/* set dirty bit */
|
| 1874 |
cpu_physical_memory_set_dirty_flags(addr, (0xff & ~CODE_DIRTY_FLAG));
|
| 1875 |
} |
| 1876 |
xen_modified_memory(addr, length); |
| 1877 |
} |
| 1878 |
|
| 1879 |
static inline bool memory_access_is_direct(MemoryRegion *mr, bool is_write) |
| 1880 |
{
|
| 1881 |
if (memory_region_is_ram(mr)) {
|
| 1882 |
return !(is_write && mr->readonly);
|
| 1883 |
} |
| 1884 |
if (memory_region_is_romd(mr)) {
|
| 1885 |
return !is_write;
|
| 1886 |
} |
| 1887 |
|
| 1888 |
return false; |
| 1889 |
} |
| 1890 |
|
| 1891 |
static inline int memory_access_size(int l, hwaddr addr) |
| 1892 |
{
|
| 1893 |
if (l >= 4 && ((addr & 3) == 0)) { |
| 1894 |
return 4; |
| 1895 |
} |
| 1896 |
if (l >= 2 && ((addr & 1) == 0)) { |
| 1897 |
return 2; |
| 1898 |
} |
| 1899 |
return 1; |
| 1900 |
} |
| 1901 |
|
| 1902 |
void address_space_rw(AddressSpace *as, hwaddr addr, uint8_t *buf,
|
| 1903 |
int len, bool is_write) |
| 1904 |
{
|
| 1905 |
hwaddr l; |
| 1906 |
uint8_t *ptr; |
| 1907 |
uint32_t val; |
| 1908 |
hwaddr addr1; |
| 1909 |
MemoryRegionSection *section; |
| 1910 |
|
| 1911 |
while (len > 0) { |
| 1912 |
l = len; |
| 1913 |
section = address_space_translate(as, addr, &addr1, &l, is_write); |
| 1914 |
|
| 1915 |
if (is_write) {
|
| 1916 |
if (!memory_access_is_direct(section->mr, is_write)) {
|
| 1917 |
l = memory_access_size(l, addr1); |
| 1918 |
/* XXX: could force cpu_single_env to NULL to avoid
|
| 1919 |
potential bugs */
|
| 1920 |
if (l == 4) { |
| 1921 |
/* 32 bit write access */
|
| 1922 |
val = ldl_p(buf); |
| 1923 |
io_mem_write(section->mr, addr1, val, 4);
|
| 1924 |
} else if (l == 2) { |
| 1925 |
/* 16 bit write access */
|
| 1926 |
val = lduw_p(buf); |
| 1927 |
io_mem_write(section->mr, addr1, val, 2);
|
| 1928 |
} else {
|
| 1929 |
/* 8 bit write access */
|
| 1930 |
val = ldub_p(buf); |
| 1931 |
io_mem_write(section->mr, addr1, val, 1);
|
| 1932 |
} |
| 1933 |
} else {
|
| 1934 |
addr1 += memory_region_get_ram_addr(section->mr); |
| 1935 |
/* RAM case */
|
| 1936 |
ptr = qemu_get_ram_ptr(addr1); |
| 1937 |
memcpy(ptr, buf, l); |
| 1938 |
invalidate_and_set_dirty(addr1, l); |
| 1939 |
} |
| 1940 |
} else {
|
| 1941 |
if (!memory_access_is_direct(section->mr, is_write)) {
|
| 1942 |
/* I/O case */
|
| 1943 |
l = memory_access_size(l, addr1); |
| 1944 |
if (l == 4) { |
| 1945 |
/* 32 bit read access */
|
| 1946 |
val = io_mem_read(section->mr, addr1, 4);
|
| 1947 |
stl_p(buf, val); |
| 1948 |
} else if (l == 2) { |
| 1949 |
/* 16 bit read access */
|
| 1950 |
val = io_mem_read(section->mr, addr1, 2);
|
| 1951 |
stw_p(buf, val); |
| 1952 |
} else {
|
| 1953 |
/* 8 bit read access */
|
| 1954 |
val = io_mem_read(section->mr, addr1, 1);
|
| 1955 |
stb_p(buf, val); |
| 1956 |
} |
| 1957 |
} else {
|
| 1958 |
/* RAM case */
|
| 1959 |
ptr = qemu_get_ram_ptr(section->mr->ram_addr + addr1); |
| 1960 |
memcpy(buf, ptr, l); |
| 1961 |
} |
| 1962 |
} |
| 1963 |
len -= l; |
| 1964 |
buf += l; |
| 1965 |
addr += l; |
| 1966 |
} |
| 1967 |
} |
| 1968 |
|
| 1969 |
void address_space_write(AddressSpace *as, hwaddr addr,
|
| 1970 |
const uint8_t *buf, int len) |
| 1971 |
{
|
| 1972 |
address_space_rw(as, addr, (uint8_t *)buf, len, true);
|
| 1973 |
} |
| 1974 |
|
| 1975 |
/**
|
| 1976 |
* address_space_read: read from an address space.
|
| 1977 |
*
|
| 1978 |
* @as: #AddressSpace to be accessed
|
| 1979 |
* @addr: address within that address space
|
| 1980 |
* @buf: buffer with the data transferred
|
| 1981 |
*/
|
| 1982 |
void address_space_read(AddressSpace *as, hwaddr addr, uint8_t *buf, int len) |
| 1983 |
{
|
| 1984 |
address_space_rw(as, addr, buf, len, false);
|
| 1985 |
} |
| 1986 |
|
| 1987 |
|
| 1988 |
void cpu_physical_memory_rw(hwaddr addr, uint8_t *buf,
|
| 1989 |
int len, int is_write) |
| 1990 |
{
|
| 1991 |
return address_space_rw(&address_space_memory, addr, buf, len, is_write);
|
| 1992 |
} |
| 1993 |
|
| 1994 |
/* used for ROM loading : can write in RAM and ROM */
|
| 1995 |
void cpu_physical_memory_write_rom(hwaddr addr,
|
| 1996 |
const uint8_t *buf, int len) |
| 1997 |
{
|
| 1998 |
hwaddr l; |
| 1999 |
uint8_t *ptr; |
| 2000 |
hwaddr addr1; |
| 2001 |
MemoryRegionSection *section; |
| 2002 |
|
| 2003 |
while (len > 0) { |
| 2004 |
l = len; |
| 2005 |
section = address_space_translate(&address_space_memory, |
| 2006 |
addr, &addr1, &l, true);
|
| 2007 |
|
| 2008 |
if (!(memory_region_is_ram(section->mr) ||
|
| 2009 |
memory_region_is_romd(section->mr))) {
|
| 2010 |
/* do nothing */
|
| 2011 |
} else {
|
| 2012 |
addr1 += memory_region_get_ram_addr(section->mr); |
| 2013 |
/* ROM/RAM case */
|
| 2014 |
ptr = qemu_get_ram_ptr(addr1); |
| 2015 |
memcpy(ptr, buf, l); |
| 2016 |
invalidate_and_set_dirty(addr1, l); |
| 2017 |
} |
| 2018 |
len -= l; |
| 2019 |
buf += l; |
| 2020 |
addr += l; |
| 2021 |
} |
| 2022 |
} |
| 2023 |
|
| 2024 |
typedef struct { |
| 2025 |
void *buffer;
|
| 2026 |
hwaddr addr; |
| 2027 |
hwaddr len; |
| 2028 |
} BounceBuffer; |
| 2029 |
|
| 2030 |
static BounceBuffer bounce;
|
| 2031 |
|
| 2032 |
typedef struct MapClient { |
| 2033 |
void *opaque;
|
| 2034 |
void (*callback)(void *opaque); |
| 2035 |
QLIST_ENTRY(MapClient) link; |
| 2036 |
} MapClient; |
| 2037 |
|
| 2038 |
static QLIST_HEAD(map_client_list, MapClient) map_client_list
|
| 2039 |
= QLIST_HEAD_INITIALIZER(map_client_list); |
| 2040 |
|
| 2041 |
void *cpu_register_map_client(void *opaque, void (*callback)(void *opaque)) |
| 2042 |
{
|
| 2043 |
MapClient *client = g_malloc(sizeof(*client));
|
| 2044 |
|
| 2045 |
client->opaque = opaque; |
| 2046 |
client->callback = callback; |
| 2047 |
QLIST_INSERT_HEAD(&map_client_list, client, link); |
| 2048 |
return client;
|
| 2049 |
} |
| 2050 |
|
| 2051 |
static void cpu_unregister_map_client(void *_client) |
| 2052 |
{
|
| 2053 |
MapClient *client = (MapClient *)_client; |
| 2054 |
|
| 2055 |
QLIST_REMOVE(client, link); |
| 2056 |
g_free(client); |
| 2057 |
} |
| 2058 |
|
| 2059 |
static void cpu_notify_map_clients(void) |
| 2060 |
{
|
| 2061 |
MapClient *client; |
| 2062 |
|
| 2063 |
while (!QLIST_EMPTY(&map_client_list)) {
|
| 2064 |
client = QLIST_FIRST(&map_client_list); |
| 2065 |
client->callback(client->opaque); |
| 2066 |
cpu_unregister_map_client(client); |
| 2067 |
} |
| 2068 |
} |
| 2069 |
|
| 2070 |
bool address_space_access_valid(AddressSpace *as, hwaddr addr, int len, bool is_write) |
| 2071 |
{
|
| 2072 |
MemoryRegionSection *section; |
| 2073 |
hwaddr l, xlat; |
| 2074 |
|
| 2075 |
while (len > 0) { |
| 2076 |
l = len; |
| 2077 |
section = address_space_translate(as, addr, &xlat, &l, is_write); |
| 2078 |
if (!memory_access_is_direct(section->mr, is_write)) {
|
| 2079 |
l = memory_access_size(l, addr); |
| 2080 |
if (!memory_region_access_valid(section->mr, xlat, l, is_write)) {
|
| 2081 |
return false; |
| 2082 |
} |
| 2083 |
} |
| 2084 |
|
| 2085 |
len -= l; |
| 2086 |
addr += l; |
| 2087 |
} |
| 2088 |
return true; |
| 2089 |
} |
| 2090 |
|
| 2091 |
/* Map a physical memory region into a host virtual address.
|
| 2092 |
* May map a subset of the requested range, given by and returned in *plen.
|
| 2093 |
* May return NULL if resources needed to perform the mapping are exhausted.
|
| 2094 |
* Use only for reads OR writes - not for read-modify-write operations.
|
| 2095 |
* Use cpu_register_map_client() to know when retrying the map operation is
|
| 2096 |
* likely to succeed.
|
| 2097 |
*/
|
| 2098 |
void *address_space_map(AddressSpace *as,
|
| 2099 |
hwaddr addr, |
| 2100 |
hwaddr *plen, |
| 2101 |
bool is_write)
|
| 2102 |
{
|
| 2103 |
hwaddr len = *plen; |
| 2104 |
hwaddr todo = 0;
|
| 2105 |
hwaddr l, xlat; |
| 2106 |
MemoryRegionSection *section; |
| 2107 |
ram_addr_t raddr = RAM_ADDR_MAX; |
| 2108 |
ram_addr_t rlen; |
| 2109 |
void *ret;
|
| 2110 |
|
| 2111 |
while (len > 0) { |
| 2112 |
l = len; |
| 2113 |
section = address_space_translate(as, addr, &xlat, &l, is_write); |
| 2114 |
|
| 2115 |
if (!memory_access_is_direct(section->mr, is_write)) {
|
| 2116 |
if (todo || bounce.buffer) {
|
| 2117 |
break;
|
| 2118 |
} |
| 2119 |
bounce.buffer = qemu_memalign(TARGET_PAGE_SIZE, TARGET_PAGE_SIZE); |
| 2120 |
bounce.addr = addr; |
| 2121 |
bounce.len = l; |
| 2122 |
if (!is_write) {
|
| 2123 |
address_space_read(as, addr, bounce.buffer, l); |
| 2124 |
} |
| 2125 |
|
| 2126 |
*plen = l; |
| 2127 |
return bounce.buffer;
|
| 2128 |
} |
| 2129 |
if (!todo) {
|
| 2130 |
raddr = memory_region_get_ram_addr(section->mr) + xlat; |
| 2131 |
} else {
|
| 2132 |
if (memory_region_get_ram_addr(section->mr) + xlat != raddr + todo) {
|
| 2133 |
break;
|
| 2134 |
} |
| 2135 |
} |
| 2136 |
|
| 2137 |
len -= l; |
| 2138 |
addr += l; |
| 2139 |
todo += l; |
| 2140 |
} |
| 2141 |
rlen = todo; |
| 2142 |
ret = qemu_ram_ptr_length(raddr, &rlen); |
| 2143 |
*plen = rlen; |
| 2144 |
return ret;
|
| 2145 |
} |
| 2146 |
|
| 2147 |
/* Unmaps a memory region previously mapped by address_space_map().
|
| 2148 |
* Will also mark the memory as dirty if is_write == 1. access_len gives
|
| 2149 |
* the amount of memory that was actually read or written by the caller.
|
| 2150 |
*/
|
| 2151 |
void address_space_unmap(AddressSpace *as, void *buffer, hwaddr len, |
| 2152 |
int is_write, hwaddr access_len)
|
| 2153 |
{
|
| 2154 |
if (buffer != bounce.buffer) {
|
| 2155 |
if (is_write) {
|
| 2156 |
ram_addr_t addr1 = qemu_ram_addr_from_host_nofail(buffer); |
| 2157 |
while (access_len) {
|
| 2158 |
unsigned l;
|
| 2159 |
l = TARGET_PAGE_SIZE; |
| 2160 |
if (l > access_len)
|
| 2161 |
l = access_len; |
| 2162 |
invalidate_and_set_dirty(addr1, l); |
| 2163 |
addr1 += l; |
| 2164 |
access_len -= l; |
| 2165 |
} |
| 2166 |
} |
| 2167 |
if (xen_enabled()) {
|
| 2168 |
xen_invalidate_map_cache_entry(buffer); |
| 2169 |
} |
| 2170 |
return;
|
| 2171 |
} |
| 2172 |
if (is_write) {
|
| 2173 |
address_space_write(as, bounce.addr, bounce.buffer, access_len); |
| 2174 |
} |
| 2175 |
qemu_vfree(bounce.buffer); |
| 2176 |
bounce.buffer = NULL;
|
| 2177 |
cpu_notify_map_clients(); |
| 2178 |
} |
| 2179 |
|
| 2180 |
void *cpu_physical_memory_map(hwaddr addr,
|
| 2181 |
hwaddr *plen, |
| 2182 |
int is_write)
|
| 2183 |
{
|
| 2184 |
return address_space_map(&address_space_memory, addr, plen, is_write);
|
| 2185 |
} |
| 2186 |
|
| 2187 |
void cpu_physical_memory_unmap(void *buffer, hwaddr len, |
| 2188 |
int is_write, hwaddr access_len)
|
| 2189 |
{
|
| 2190 |
return address_space_unmap(&address_space_memory, buffer, len, is_write, access_len);
|
| 2191 |
} |
| 2192 |
|
| 2193 |
/* warning: addr must be aligned */
|
| 2194 |
static inline uint32_t ldl_phys_internal(hwaddr addr, |
| 2195 |
enum device_endian endian)
|
| 2196 |
{
|
| 2197 |
uint8_t *ptr; |
| 2198 |
uint32_t val; |
| 2199 |
MemoryRegionSection *section; |
| 2200 |
hwaddr l = 4;
|
| 2201 |
hwaddr addr1; |
| 2202 |
|
| 2203 |
section = address_space_translate(&address_space_memory, addr, &addr1, &l, |
| 2204 |
false);
|
| 2205 |
if (l < 4 || !memory_access_is_direct(section->mr, false)) { |
| 2206 |
/* I/O case */
|
| 2207 |
val = io_mem_read(section->mr, addr1, 4);
|
| 2208 |
#if defined(TARGET_WORDS_BIGENDIAN)
|
| 2209 |
if (endian == DEVICE_LITTLE_ENDIAN) {
|
| 2210 |
val = bswap32(val); |
| 2211 |
} |
| 2212 |
#else
|
| 2213 |
if (endian == DEVICE_BIG_ENDIAN) {
|
| 2214 |
val = bswap32(val); |
| 2215 |
} |
| 2216 |
#endif
|
| 2217 |
} else {
|
| 2218 |
/* RAM case */
|
| 2219 |
ptr = qemu_get_ram_ptr((memory_region_get_ram_addr(section->mr) |
| 2220 |
& TARGET_PAGE_MASK) |
| 2221 |
+ addr1); |
| 2222 |
switch (endian) {
|
| 2223 |
case DEVICE_LITTLE_ENDIAN:
|
| 2224 |
val = ldl_le_p(ptr); |
| 2225 |
break;
|
| 2226 |
case DEVICE_BIG_ENDIAN:
|
| 2227 |
val = ldl_be_p(ptr); |
| 2228 |
break;
|
| 2229 |
default:
|
| 2230 |
val = ldl_p(ptr); |
| 2231 |
break;
|
| 2232 |
} |
| 2233 |
} |
| 2234 |
return val;
|
| 2235 |
} |
| 2236 |
|
| 2237 |
uint32_t ldl_phys(hwaddr addr) |
| 2238 |
{
|
| 2239 |
return ldl_phys_internal(addr, DEVICE_NATIVE_ENDIAN);
|
| 2240 |
} |
| 2241 |
|
| 2242 |
uint32_t ldl_le_phys(hwaddr addr) |
| 2243 |
{
|
| 2244 |
return ldl_phys_internal(addr, DEVICE_LITTLE_ENDIAN);
|
| 2245 |
} |
| 2246 |
|
| 2247 |
uint32_t ldl_be_phys(hwaddr addr) |
| 2248 |
{
|
| 2249 |
return ldl_phys_internal(addr, DEVICE_BIG_ENDIAN);
|
| 2250 |
} |
| 2251 |
|
| 2252 |
/* warning: addr must be aligned */
|
| 2253 |
static inline uint64_t ldq_phys_internal(hwaddr addr, |
| 2254 |
enum device_endian endian)
|
| 2255 |
{
|
| 2256 |
uint8_t *ptr; |
| 2257 |
uint64_t val; |
| 2258 |
MemoryRegionSection *section; |
| 2259 |
hwaddr l = 8;
|
| 2260 |
hwaddr addr1; |
| 2261 |
|
| 2262 |
section = address_space_translate(&address_space_memory, addr, &addr1, &l, |
| 2263 |
false);
|
| 2264 |
if (l < 8 || !memory_access_is_direct(section->mr, false)) { |
| 2265 |
/* I/O case */
|
| 2266 |
|
| 2267 |
/* XXX This is broken when device endian != cpu endian.
|
| 2268 |
Fix and add "endian" variable check */
|
| 2269 |
#ifdef TARGET_WORDS_BIGENDIAN
|
| 2270 |
val = io_mem_read(section->mr, addr1, 4) << 32; |
| 2271 |
val |= io_mem_read(section->mr, addr1 + 4, 4); |
| 2272 |
#else
|
| 2273 |
val = io_mem_read(section->mr, addr1, 4);
|
| 2274 |
val |= io_mem_read(section->mr, addr1 + 4, 4) << 32; |
| 2275 |
#endif
|
| 2276 |
} else {
|
| 2277 |
/* RAM case */
|
| 2278 |
ptr = qemu_get_ram_ptr((memory_region_get_ram_addr(section->mr) |
| 2279 |
& TARGET_PAGE_MASK) |
| 2280 |
+ addr1); |
| 2281 |
switch (endian) {
|
| 2282 |
case DEVICE_LITTLE_ENDIAN:
|
| 2283 |
val = ldq_le_p(ptr); |
| 2284 |
break;
|
| 2285 |
case DEVICE_BIG_ENDIAN:
|
| 2286 |
val = ldq_be_p(ptr); |
| 2287 |
break;
|
| 2288 |
default:
|
| 2289 |
val = ldq_p(ptr); |
| 2290 |
break;
|
| 2291 |
} |
| 2292 |
} |
| 2293 |
return val;
|
| 2294 |
} |
| 2295 |
|
| 2296 |
uint64_t ldq_phys(hwaddr addr) |
| 2297 |
{
|
| 2298 |
return ldq_phys_internal(addr, DEVICE_NATIVE_ENDIAN);
|
| 2299 |
} |
| 2300 |
|
| 2301 |
uint64_t ldq_le_phys(hwaddr addr) |
| 2302 |
{
|
| 2303 |
return ldq_phys_internal(addr, DEVICE_LITTLE_ENDIAN);
|
| 2304 |
} |
| 2305 |
|
| 2306 |
uint64_t ldq_be_phys(hwaddr addr) |
| 2307 |
{
|
| 2308 |
return ldq_phys_internal(addr, DEVICE_BIG_ENDIAN);
|
| 2309 |
} |
| 2310 |
|
| 2311 |
/* XXX: optimize */
|
| 2312 |
uint32_t ldub_phys(hwaddr addr) |
| 2313 |
{
|
| 2314 |
uint8_t val; |
| 2315 |
cpu_physical_memory_read(addr, &val, 1);
|
| 2316 |
return val;
|
| 2317 |
} |
| 2318 |
|
| 2319 |
/* warning: addr must be aligned */
|
| 2320 |
static inline uint32_t lduw_phys_internal(hwaddr addr, |
| 2321 |
enum device_endian endian)
|
| 2322 |
{
|
| 2323 |
uint8_t *ptr; |
| 2324 |
uint64_t val; |
| 2325 |
MemoryRegionSection *section; |
| 2326 |
hwaddr l = 2;
|
| 2327 |
hwaddr addr1; |
| 2328 |
|
| 2329 |
section = address_space_translate(&address_space_memory, addr, &addr1, &l, |
| 2330 |
false);
|
| 2331 |
if (l < 2 || !memory_access_is_direct(section->mr, false)) { |
| 2332 |
/* I/O case */
|
| 2333 |
val = io_mem_read(section->mr, addr1, 2);
|
| 2334 |
#if defined(TARGET_WORDS_BIGENDIAN)
|
| 2335 |
if (endian == DEVICE_LITTLE_ENDIAN) {
|
| 2336 |
val = bswap16(val); |
| 2337 |
} |
| 2338 |
#else
|
| 2339 |
if (endian == DEVICE_BIG_ENDIAN) {
|
| 2340 |
val = bswap16(val); |
| 2341 |
} |
| 2342 |
#endif
|
| 2343 |
} else {
|
| 2344 |
/* RAM case */
|
| 2345 |
ptr = qemu_get_ram_ptr((memory_region_get_ram_addr(section->mr) |
| 2346 |
& TARGET_PAGE_MASK) |
| 2347 |
+ addr1); |
| 2348 |
switch (endian) {
|
| 2349 |
case DEVICE_LITTLE_ENDIAN:
|
| 2350 |
val = lduw_le_p(ptr); |
| 2351 |
break;
|
| 2352 |
case DEVICE_BIG_ENDIAN:
|
| 2353 |
val = lduw_be_p(ptr); |
| 2354 |
break;
|
| 2355 |
default:
|
| 2356 |
val = lduw_p(ptr); |
| 2357 |
break;
|
| 2358 |
} |
| 2359 |
} |
| 2360 |
return val;
|
| 2361 |
} |
| 2362 |
|
| 2363 |
uint32_t lduw_phys(hwaddr addr) |
| 2364 |
{
|
| 2365 |
return lduw_phys_internal(addr, DEVICE_NATIVE_ENDIAN);
|
| 2366 |
} |
| 2367 |
|
| 2368 |
uint32_t lduw_le_phys(hwaddr addr) |
| 2369 |
{
|
| 2370 |
return lduw_phys_internal(addr, DEVICE_LITTLE_ENDIAN);
|
| 2371 |
} |
| 2372 |
|
| 2373 |
uint32_t lduw_be_phys(hwaddr addr) |
| 2374 |
{
|
| 2375 |
return lduw_phys_internal(addr, DEVICE_BIG_ENDIAN);
|
| 2376 |
} |
| 2377 |
|
| 2378 |
/* warning: addr must be aligned. The ram page is not masked as dirty
|
| 2379 |
and the code inside is not invalidated. It is useful if the dirty
|
| 2380 |
bits are used to track modified PTEs */
|
| 2381 |
void stl_phys_notdirty(hwaddr addr, uint32_t val)
|
| 2382 |
{
|
| 2383 |
uint8_t *ptr; |
| 2384 |
MemoryRegionSection *section; |
| 2385 |
hwaddr l = 4;
|
| 2386 |
hwaddr addr1; |
| 2387 |
|
| 2388 |
section = address_space_translate(&address_space_memory, addr, &addr1, &l, |
| 2389 |
true);
|
| 2390 |
if (l < 4 || !memory_access_is_direct(section->mr, true)) { |
| 2391 |
io_mem_write(section->mr, addr1, val, 4);
|
| 2392 |
} else {
|
| 2393 |
addr1 += memory_region_get_ram_addr(section->mr) & TARGET_PAGE_MASK; |
| 2394 |
ptr = qemu_get_ram_ptr(addr1); |
| 2395 |
stl_p(ptr, val); |
| 2396 |
|
| 2397 |
if (unlikely(in_migration)) {
|
| 2398 |
if (!cpu_physical_memory_is_dirty(addr1)) {
|
| 2399 |
/* invalidate code */
|
| 2400 |
tb_invalidate_phys_page_range(addr1, addr1 + 4, 0); |
| 2401 |
/* set dirty bit */
|
| 2402 |
cpu_physical_memory_set_dirty_flags( |
| 2403 |
addr1, (0xff & ~CODE_DIRTY_FLAG));
|
| 2404 |
} |
| 2405 |
} |
| 2406 |
} |
| 2407 |
} |
| 2408 |
|
| 2409 |
/* warning: addr must be aligned */
|
| 2410 |
static inline void stl_phys_internal(hwaddr addr, uint32_t val, |
| 2411 |
enum device_endian endian)
|
| 2412 |
{
|
| 2413 |
uint8_t *ptr; |
| 2414 |
MemoryRegionSection *section; |
| 2415 |
hwaddr l = 4;
|
| 2416 |
hwaddr addr1; |
| 2417 |
|
| 2418 |
section = address_space_translate(&address_space_memory, addr, &addr1, &l, |
| 2419 |
true);
|
| 2420 |
if (l < 4 || !memory_access_is_direct(section->mr, true)) { |
| 2421 |
#if defined(TARGET_WORDS_BIGENDIAN)
|
| 2422 |
if (endian == DEVICE_LITTLE_ENDIAN) {
|
| 2423 |
val = bswap32(val); |
| 2424 |
} |
| 2425 |
#else
|
| 2426 |
if (endian == DEVICE_BIG_ENDIAN) {
|
| 2427 |
val = bswap32(val); |
| 2428 |
} |
| 2429 |
#endif
|
| 2430 |
io_mem_write(section->mr, addr1, val, 4);
|
| 2431 |
} else {
|
| 2432 |
/* RAM case */
|
| 2433 |
addr1 += memory_region_get_ram_addr(section->mr) & TARGET_PAGE_MASK; |
| 2434 |
ptr = qemu_get_ram_ptr(addr1); |
| 2435 |
switch (endian) {
|
| 2436 |
case DEVICE_LITTLE_ENDIAN:
|
| 2437 |
stl_le_p(ptr, val); |
| 2438 |
break;
|
| 2439 |
case DEVICE_BIG_ENDIAN:
|
| 2440 |
stl_be_p(ptr, val); |
| 2441 |
break;
|
| 2442 |
default:
|
| 2443 |
stl_p(ptr, val); |
| 2444 |
break;
|
| 2445 |
} |
| 2446 |
invalidate_and_set_dirty(addr1, 4);
|
| 2447 |
} |
| 2448 |
} |
| 2449 |
|
| 2450 |
void stl_phys(hwaddr addr, uint32_t val)
|
| 2451 |
{
|
| 2452 |
stl_phys_internal(addr, val, DEVICE_NATIVE_ENDIAN); |
| 2453 |
} |
| 2454 |
|
| 2455 |
void stl_le_phys(hwaddr addr, uint32_t val)
|
| 2456 |
{
|
| 2457 |
stl_phys_internal(addr, val, DEVICE_LITTLE_ENDIAN); |
| 2458 |
} |
| 2459 |
|
| 2460 |
void stl_be_phys(hwaddr addr, uint32_t val)
|
| 2461 |
{
|
| 2462 |
stl_phys_internal(addr, val, DEVICE_BIG_ENDIAN); |
| 2463 |
} |
| 2464 |
|
| 2465 |
/* XXX: optimize */
|
| 2466 |
void stb_phys(hwaddr addr, uint32_t val)
|
| 2467 |
{
|
| 2468 |
uint8_t v = val; |
| 2469 |
cpu_physical_memory_write(addr, &v, 1);
|
| 2470 |
} |
| 2471 |
|
| 2472 |
/* warning: addr must be aligned */
|
| 2473 |
static inline void stw_phys_internal(hwaddr addr, uint32_t val, |
| 2474 |
enum device_endian endian)
|
| 2475 |
{
|
| 2476 |
uint8_t *ptr; |
| 2477 |
MemoryRegionSection *section; |
| 2478 |
hwaddr l = 2;
|
| 2479 |
hwaddr addr1; |
| 2480 |
|
| 2481 |
section = address_space_translate(&address_space_memory, addr, &addr1, &l, |
| 2482 |
true);
|
| 2483 |
if (l < 2 || !memory_access_is_direct(section->mr, true)) { |
| 2484 |
#if defined(TARGET_WORDS_BIGENDIAN)
|
| 2485 |
if (endian == DEVICE_LITTLE_ENDIAN) {
|
| 2486 |
val = bswap16(val); |
| 2487 |
} |
| 2488 |
#else
|
| 2489 |
if (endian == DEVICE_BIG_ENDIAN) {
|
| 2490 |
val = bswap16(val); |
| 2491 |
} |
| 2492 |
#endif
|
| 2493 |
io_mem_write(section->mr, addr1, val, 2);
|
| 2494 |
} else {
|
| 2495 |
/* RAM case */
|
| 2496 |
addr1 += memory_region_get_ram_addr(section->mr) & TARGET_PAGE_MASK; |
| 2497 |
ptr = qemu_get_ram_ptr(addr1); |
| 2498 |
switch (endian) {
|
| 2499 |
case DEVICE_LITTLE_ENDIAN:
|
| 2500 |
stw_le_p(ptr, val); |
| 2501 |
break;
|
| 2502 |
case DEVICE_BIG_ENDIAN:
|
| 2503 |
stw_be_p(ptr, val); |
| 2504 |
break;
|
| 2505 |
default:
|
| 2506 |
stw_p(ptr, val); |
| 2507 |
break;
|
| 2508 |
} |
| 2509 |
invalidate_and_set_dirty(addr1, 2);
|
| 2510 |
} |
| 2511 |
} |
| 2512 |
|
| 2513 |
void stw_phys(hwaddr addr, uint32_t val)
|
| 2514 |
{
|
| 2515 |
stw_phys_internal(addr, val, DEVICE_NATIVE_ENDIAN); |
| 2516 |
} |
| 2517 |
|
| 2518 |
void stw_le_phys(hwaddr addr, uint32_t val)
|
| 2519 |
{
|
| 2520 |
stw_phys_internal(addr, val, DEVICE_LITTLE_ENDIAN); |
| 2521 |
} |
| 2522 |
|
| 2523 |
void stw_be_phys(hwaddr addr, uint32_t val)
|
| 2524 |
{
|
| 2525 |
stw_phys_internal(addr, val, DEVICE_BIG_ENDIAN); |
| 2526 |
} |
| 2527 |
|
| 2528 |
/* XXX: optimize */
|
| 2529 |
void stq_phys(hwaddr addr, uint64_t val)
|
| 2530 |
{
|
| 2531 |
val = tswap64(val); |
| 2532 |
cpu_physical_memory_write(addr, &val, 8);
|
| 2533 |
} |
| 2534 |
|
| 2535 |
void stq_le_phys(hwaddr addr, uint64_t val)
|
| 2536 |
{
|
| 2537 |
val = cpu_to_le64(val); |
| 2538 |
cpu_physical_memory_write(addr, &val, 8);
|
| 2539 |
} |
| 2540 |
|
| 2541 |
void stq_be_phys(hwaddr addr, uint64_t val)
|
| 2542 |
{
|
| 2543 |
val = cpu_to_be64(val); |
| 2544 |
cpu_physical_memory_write(addr, &val, 8);
|
| 2545 |
} |
| 2546 |
|
| 2547 |
/* virtual memory access for debug (includes writing to ROM) */
|
| 2548 |
int cpu_memory_rw_debug(CPUArchState *env, target_ulong addr,
|
| 2549 |
uint8_t *buf, int len, int is_write) |
| 2550 |
{
|
| 2551 |
int l;
|
| 2552 |
hwaddr phys_addr; |
| 2553 |
target_ulong page; |
| 2554 |
|
| 2555 |
while (len > 0) { |
| 2556 |
page = addr & TARGET_PAGE_MASK; |
| 2557 |
phys_addr = cpu_get_phys_page_debug(env, page); |
| 2558 |
/* if no physical page mapped, return an error */
|
| 2559 |
if (phys_addr == -1) |
| 2560 |
return -1; |
| 2561 |
l = (page + TARGET_PAGE_SIZE) - addr; |
| 2562 |
if (l > len)
|
| 2563 |
l = len; |
| 2564 |
phys_addr += (addr & ~TARGET_PAGE_MASK); |
| 2565 |
if (is_write)
|
| 2566 |
cpu_physical_memory_write_rom(phys_addr, buf, l); |
| 2567 |
else
|
| 2568 |
cpu_physical_memory_rw(phys_addr, buf, l, is_write); |
| 2569 |
len -= l; |
| 2570 |
buf += l; |
| 2571 |
addr += l; |
| 2572 |
} |
| 2573 |
return 0; |
| 2574 |
} |
| 2575 |
#endif
|
| 2576 |
|
| 2577 |
#if !defined(CONFIG_USER_ONLY)
|
| 2578 |
|
| 2579 |
/*
|
| 2580 |
* A helper function for the _utterly broken_ virtio device model to find out if
|
| 2581 |
* it's running on a big endian machine. Don't do this at home kids!
|
| 2582 |
*/
|
| 2583 |
bool virtio_is_big_endian(void); |
| 2584 |
bool virtio_is_big_endian(void) |
| 2585 |
{
|
| 2586 |
#if defined(TARGET_WORDS_BIGENDIAN)
|
| 2587 |
return true; |
| 2588 |
#else
|
| 2589 |
return false; |
| 2590 |
#endif
|
| 2591 |
} |
| 2592 |
|
| 2593 |
#endif
|
| 2594 |
|
| 2595 |
#ifndef CONFIG_USER_ONLY
|
| 2596 |
bool cpu_physical_memory_is_io(hwaddr phys_addr)
|
| 2597 |
{
|
| 2598 |
MemoryRegionSection *section; |
| 2599 |
hwaddr l = 1;
|
| 2600 |
|
| 2601 |
section = address_space_translate(&address_space_memory, |
| 2602 |
phys_addr, &phys_addr, &l, false);
|
| 2603 |
|
| 2604 |
return !(memory_region_is_ram(section->mr) ||
|
| 2605 |
memory_region_is_romd(section->mr)); |
| 2606 |
} |
| 2607 |
#endif
|