| /* |
| * virtual page mapping and translated block handling |
| * |
| * Copyright (c) 2003 Fabrice Bellard |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2 of the License, or (at your option) any later version. |
| * |
| * This library is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with this library; if not, write to the Free Software |
| * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| */ |
| #include "config.h" |
| #include <stdlib.h> |
| #include <stdio.h> |
| #include <stdarg.h> |
| #include <string.h> |
| #include <errno.h> |
| #include <unistd.h> |
| #include <inttypes.h> |
| #if !defined(CONFIG_SOFTMMU) |
| #include <sys/mman.h> |
| #endif |
| |
| #include "cpu.h" |
| #include "exec-all.h" |
| |
| //#define DEBUG_TB_INVALIDATE |
| //#define DEBUG_FLUSH |
| //#define DEBUG_TLB |
| |
| /* make various TB consistency checks */ |
| //#define DEBUG_TB_CHECK |
| //#define DEBUG_TLB_CHECK |
| |
| /* threshold to flush the translated code buffer */ |
| #define CODE_GEN_BUFFER_MAX_SIZE (CODE_GEN_BUFFER_SIZE - CODE_GEN_MAX_SIZE) |
| |
| #define SMC_BITMAP_USE_THRESHOLD 10 |
| |
| #define MMAP_AREA_START 0x00000000 |
| #define MMAP_AREA_END 0xa8000000 |
| |
| TranslationBlock tbs[CODE_GEN_MAX_BLOCKS]; |
| TranslationBlock *tb_hash[CODE_GEN_HASH_SIZE]; |
| TranslationBlock *tb_phys_hash[CODE_GEN_PHYS_HASH_SIZE]; |
| int nb_tbs; |
| /* any access to the tbs or the page table must use this lock */ |
| spinlock_t tb_lock = SPIN_LOCK_UNLOCKED; |
| |
| uint8_t code_gen_buffer[CODE_GEN_BUFFER_SIZE]; |
| uint8_t *code_gen_ptr; |
| |
| int phys_ram_size; |
| int phys_ram_fd; |
| uint8_t *phys_ram_base; |
| uint8_t *phys_ram_dirty; |
| |
| typedef struct PageDesc { |
| /* offset in host memory of the page + io_index in the low 12 bits */ |
| unsigned long phys_offset; |
| /* list of TBs intersecting this physical page */ |
| TranslationBlock *first_tb; |
| /* in order to optimize self modifying code, we count the number |
| of lookups we do to a given page to use a bitmap */ |
| unsigned int code_write_count; |
| uint8_t *code_bitmap; |
| #if defined(CONFIG_USER_ONLY) |
| unsigned long flags; |
| #endif |
| } PageDesc; |
| |
| typedef struct VirtPageDesc { |
| /* physical address of code page. It is valid only if 'valid_tag' |
| matches 'virt_valid_tag' */ |
| target_ulong phys_addr; |
| unsigned int valid_tag; |
| #if !defined(CONFIG_SOFTMMU) |
| /* original page access rights. It is valid only if 'valid_tag' |
| matches 'virt_valid_tag' */ |
| unsigned int prot; |
| #endif |
| } VirtPageDesc; |
| |
| #define L2_BITS 10 |
| #define L1_BITS (32 - L2_BITS - TARGET_PAGE_BITS) |
| |
| #define L1_SIZE (1 << L1_BITS) |
| #define L2_SIZE (1 << L2_BITS) |
| |
| static void io_mem_init(void); |
| |
| unsigned long real_host_page_size; |
| unsigned long host_page_bits; |
| unsigned long host_page_size; |
| unsigned long host_page_mask; |
| |
| static PageDesc *l1_map[L1_SIZE]; |
| |
| #if !defined(CONFIG_USER_ONLY) |
| static VirtPageDesc *l1_virt_map[L1_SIZE]; |
| static unsigned int virt_valid_tag; |
| #endif |
| |
| /* io memory support */ |
| CPUWriteMemoryFunc *io_mem_write[IO_MEM_NB_ENTRIES][4]; |
| CPUReadMemoryFunc *io_mem_read[IO_MEM_NB_ENTRIES][4]; |
| static int io_mem_nb; |
| |
| /* log support */ |
| char *logfilename = "/tmp/qemu.log"; |
| FILE *logfile; |
| int loglevel; |
| |
| static void page_init(void) |
| { |
| /* NOTE: we can always suppose that host_page_size >= |
| TARGET_PAGE_SIZE */ |
| #ifdef _WIN32 |
| real_host_page_size = 4096; |
| #else |
| real_host_page_size = getpagesize(); |
| #endif |
| if (host_page_size == 0) |
| host_page_size = real_host_page_size; |
| if (host_page_size < TARGET_PAGE_SIZE) |
| host_page_size = TARGET_PAGE_SIZE; |
| host_page_bits = 0; |
| while ((1 << host_page_bits) < host_page_size) |
| host_page_bits++; |
| host_page_mask = ~(host_page_size - 1); |
| #if !defined(CONFIG_USER_ONLY) |
| virt_valid_tag = 1; |
| #endif |
| } |
| |
| static inline PageDesc *page_find_alloc(unsigned int index) |
| { |
| PageDesc **lp, *p; |
| |
| lp = &l1_map[index >> L2_BITS]; |
| p = *lp; |
| if (!p) { |
| /* allocate if not found */ |
| p = qemu_malloc(sizeof(PageDesc) * L2_SIZE); |
| memset(p, 0, sizeof(PageDesc) * L2_SIZE); |
| *lp = p; |
| } |
| return p + (index & (L2_SIZE - 1)); |
| } |
| |
| static inline PageDesc *page_find(unsigned int index) |
| { |
| PageDesc *p; |
| |
| p = l1_map[index >> L2_BITS]; |
| if (!p) |
| return 0; |
| return p + (index & (L2_SIZE - 1)); |
| } |
| |
| #if !defined(CONFIG_USER_ONLY) |
| static void tlb_protect_code(CPUState *env, target_ulong addr); |
| static void tlb_unprotect_code_phys(CPUState *env, unsigned long phys_addr, target_ulong vaddr); |
| |
| static inline VirtPageDesc *virt_page_find_alloc(unsigned int index) |
| { |
| VirtPageDesc **lp, *p; |
| |
| lp = &l1_virt_map[index >> L2_BITS]; |
| p = *lp; |
| if (!p) { |
| /* allocate if not found */ |
| p = qemu_malloc(sizeof(VirtPageDesc) * L2_SIZE); |
| memset(p, 0, sizeof(VirtPageDesc) * L2_SIZE); |
| *lp = p; |
| } |
| return p + (index & (L2_SIZE - 1)); |
| } |
| |
| static inline VirtPageDesc *virt_page_find(unsigned int index) |
| { |
| VirtPageDesc *p; |
| |
| p = l1_virt_map[index >> L2_BITS]; |
| if (!p) |
| return 0; |
| return p + (index & (L2_SIZE - 1)); |
| } |
| |
| static void virt_page_flush(void) |
| { |
| int i, j; |
| VirtPageDesc *p; |
| |
| virt_valid_tag++; |
| |
| if (virt_valid_tag == 0) { |
| virt_valid_tag = 1; |
| for(i = 0; i < L1_SIZE; i++) { |
| p = l1_virt_map[i]; |
| if (p) { |
| for(j = 0; j < L2_SIZE; j++) |
| p[j].valid_tag = 0; |
| } |
| } |
| } |
| } |
| #else |
| static void virt_page_flush(void) |
| { |
| } |
| #endif |
| |
| void cpu_exec_init(void) |
| { |
| if (!code_gen_ptr) { |
| code_gen_ptr = code_gen_buffer; |
| page_init(); |
| io_mem_init(); |
| } |
| } |
| |
| static inline void invalidate_page_bitmap(PageDesc *p) |
| { |
| if (p->code_bitmap) { |
| qemu_free(p->code_bitmap); |
| p->code_bitmap = NULL; |
| } |
| p->code_write_count = 0; |
| } |
| |
| /* set to NULL all the 'first_tb' fields in all PageDescs */ |
| static void page_flush_tb(void) |
| { |
| int i, j; |
| PageDesc *p; |
| |
| for(i = 0; i < L1_SIZE; i++) { |
| p = l1_map[i]; |
| if (p) { |
| for(j = 0; j < L2_SIZE; j++) { |
| p->first_tb = NULL; |
| invalidate_page_bitmap(p); |
| p++; |
| } |
| } |
| } |
| } |
| |
| /* flush all the translation blocks */ |
| /* XXX: tb_flush is currently not thread safe */ |
| void tb_flush(CPUState *env) |
| { |
| int i; |
| #if defined(DEBUG_FLUSH) |
| printf("qemu: flush code_size=%d nb_tbs=%d avg_tb_size=%d\n", |
| code_gen_ptr - code_gen_buffer, |
| nb_tbs, |
| nb_tbs > 0 ? (code_gen_ptr - code_gen_buffer) / nb_tbs : 0); |
| #endif |
| nb_tbs = 0; |
| for(i = 0;i < CODE_GEN_HASH_SIZE; i++) |
| tb_hash[i] = NULL; |
| virt_page_flush(); |
| |
| for(i = 0;i < CODE_GEN_PHYS_HASH_SIZE; i++) |
| tb_phys_hash[i] = NULL; |
| page_flush_tb(); |
| |
| code_gen_ptr = code_gen_buffer; |
| /* XXX: flush processor icache at this point if cache flush is |
| expensive */ |
| } |
| |
| #ifdef DEBUG_TB_CHECK |
| |
| static void tb_invalidate_check(unsigned long address) |
| { |
| TranslationBlock *tb; |
| int i; |
| address &= TARGET_PAGE_MASK; |
| for(i = 0;i < CODE_GEN_HASH_SIZE; i++) { |
| for(tb = tb_hash[i]; tb != NULL; tb = tb->hash_next) { |
| if (!(address + TARGET_PAGE_SIZE <= tb->pc || |
| address >= tb->pc + tb->size)) { |
| printf("ERROR invalidate: address=%08lx PC=%08lx size=%04x\n", |
| address, tb->pc, tb->size); |
| } |
| } |
| } |
| } |
| |
| /* verify that all the pages have correct rights for code */ |
| static void tb_page_check(void) |
| { |
| TranslationBlock *tb; |
| int i, flags1, flags2; |
| |
| for(i = 0;i < CODE_GEN_HASH_SIZE; i++) { |
| for(tb = tb_hash[i]; tb != NULL; tb = tb->hash_next) { |
| flags1 = page_get_flags(tb->pc); |
| flags2 = page_get_flags(tb->pc + tb->size - 1); |
| if ((flags1 & PAGE_WRITE) || (flags2 & PAGE_WRITE)) { |
| printf("ERROR page flags: PC=%08lx size=%04x f1=%x f2=%x\n", |
| tb->pc, tb->size, flags1, flags2); |
| } |
| } |
| } |
| } |
| |
| void tb_jmp_check(TranslationBlock *tb) |
| { |
| TranslationBlock *tb1; |
| unsigned int n1; |
| |
| /* suppress any remaining jumps to this TB */ |
| tb1 = tb->jmp_first; |
| for(;;) { |
| n1 = (long)tb1 & 3; |
| tb1 = (TranslationBlock *)((long)tb1 & ~3); |
| if (n1 == 2) |
| break; |
| tb1 = tb1->jmp_next[n1]; |
| } |
| /* check end of list */ |
| if (tb1 != tb) { |
| printf("ERROR: jmp_list from 0x%08lx\n", (long)tb); |
| } |
| } |
| |
| #endif |
| |
| /* invalidate one TB */ |
| static inline void tb_remove(TranslationBlock **ptb, TranslationBlock *tb, |
| int next_offset) |
| { |
| TranslationBlock *tb1; |
| for(;;) { |
| tb1 = *ptb; |
| if (tb1 == tb) { |
| *ptb = *(TranslationBlock **)((char *)tb1 + next_offset); |
| break; |
| } |
| ptb = (TranslationBlock **)((char *)tb1 + next_offset); |
| } |
| } |
| |
| static inline void tb_page_remove(TranslationBlock **ptb, TranslationBlock *tb) |
| { |
| TranslationBlock *tb1; |
| unsigned int n1; |
| |
| for(;;) { |
| tb1 = *ptb; |
| n1 = (long)tb1 & 3; |
| tb1 = (TranslationBlock *)((long)tb1 & ~3); |
| if (tb1 == tb) { |
| *ptb = tb1->page_next[n1]; |
| break; |
| } |
| ptb = &tb1->page_next[n1]; |
| } |
| } |
| |
| static inline void tb_jmp_remove(TranslationBlock *tb, int n) |
| { |
| TranslationBlock *tb1, **ptb; |
| unsigned int n1; |
| |
| ptb = &tb->jmp_next[n]; |
| tb1 = *ptb; |
| if (tb1) { |
| /* find tb(n) in circular list */ |
| for(;;) { |
| tb1 = *ptb; |
| n1 = (long)tb1 & 3; |
| tb1 = (TranslationBlock *)((long)tb1 & ~3); |
| if (n1 == n && tb1 == tb) |
| break; |
| if (n1 == 2) { |
| ptb = &tb1->jmp_first; |
| } else { |
| ptb = &tb1->jmp_next[n1]; |
| } |
| } |
| /* now we can suppress tb(n) from the list */ |
| *ptb = tb->jmp_next[n]; |
| |
| tb->jmp_next[n] = NULL; |
| } |
| } |
| |
| /* reset the jump entry 'n' of a TB so that it is not chained to |
| another TB */ |
| static inline void tb_reset_jump(TranslationBlock *tb, int n) |
| { |
| tb_set_jmp_target(tb, n, (unsigned long)(tb->tc_ptr + tb->tb_next_offset[n])); |
| } |
| |
| static inline void tb_invalidate(TranslationBlock *tb) |
| { |
| unsigned int h, n1; |
| TranslationBlock *tb1, *tb2, **ptb; |
| |
| tb_invalidated_flag = 1; |
| |
| /* remove the TB from the hash list */ |
| h = tb_hash_func(tb->pc); |
| ptb = &tb_hash[h]; |
| for(;;) { |
| tb1 = *ptb; |
| /* NOTE: the TB is not necessarily linked in the hash. It |
| indicates that it is not currently used */ |
| if (tb1 == NULL) |
| return; |
| if (tb1 == tb) { |
| *ptb = tb1->hash_next; |
| break; |
| } |
| ptb = &tb1->hash_next; |
| } |
| |
| /* suppress this TB from the two jump lists */ |
| tb_jmp_remove(tb, 0); |
| tb_jmp_remove(tb, 1); |
| |
| /* suppress any remaining jumps to this TB */ |
| tb1 = tb->jmp_first; |
| for(;;) { |
| n1 = (long)tb1 & 3; |
| if (n1 == 2) |
| break; |
| tb1 = (TranslationBlock *)((long)tb1 & ~3); |
| tb2 = tb1->jmp_next[n1]; |
| tb_reset_jump(tb1, n1); |
| tb1->jmp_next[n1] = NULL; |
| tb1 = tb2; |
| } |
| tb->jmp_first = (TranslationBlock *)((long)tb | 2); /* fail safe */ |
| } |
| |
| static inline void tb_phys_invalidate(TranslationBlock *tb, unsigned int page_addr) |
| { |
| PageDesc *p; |
| unsigned int h; |
| target_ulong phys_pc; |
| |
| /* remove the TB from the hash list */ |
| phys_pc = tb->page_addr[0] + (tb->pc & ~TARGET_PAGE_MASK); |
| h = tb_phys_hash_func(phys_pc); |
| tb_remove(&tb_phys_hash[h], tb, |
| offsetof(TranslationBlock, phys_hash_next)); |
| |
| /* remove the TB from the page list */ |
| if (tb->page_addr[0] != page_addr) { |
| p = page_find(tb->page_addr[0] >> TARGET_PAGE_BITS); |
| tb_page_remove(&p->first_tb, tb); |
| invalidate_page_bitmap(p); |
| } |
| if (tb->page_addr[1] != -1 && tb->page_addr[1] != page_addr) { |
| p = page_find(tb->page_addr[1] >> TARGET_PAGE_BITS); |
| tb_page_remove(&p->first_tb, tb); |
| invalidate_page_bitmap(p); |
| } |
| |
| tb_invalidate(tb); |
| } |
| |
| static inline void set_bits(uint8_t *tab, int start, int len) |
| { |
| int end, mask, end1; |
| |
| end = start + len; |
| tab += start >> 3; |
| mask = 0xff << (start & 7); |
| if ((start & ~7) == (end & ~7)) { |
| if (start < end) { |
| mask &= ~(0xff << (end & 7)); |
| *tab |= mask; |
| } |
| } else { |
| *tab++ |= mask; |
| start = (start + 8) & ~7; |
| end1 = end & ~7; |
| while (start < end1) { |
| *tab++ = 0xff; |
| start += 8; |
| } |
| if (start < end) { |
| mask = ~(0xff << (end & 7)); |
| *tab |= mask; |
| } |
| } |
| } |
| |
| static void build_page_bitmap(PageDesc *p) |
| { |
| int n, tb_start, tb_end; |
| TranslationBlock *tb; |
| |
| p->code_bitmap = qemu_malloc(TARGET_PAGE_SIZE / 8); |
| if (!p->code_bitmap) |
| return; |
| memset(p->code_bitmap, 0, TARGET_PAGE_SIZE / 8); |
| |
| tb = p->first_tb; |
| while (tb != NULL) { |
| n = (long)tb & 3; |
| tb = (TranslationBlock *)((long)tb & ~3); |
| /* NOTE: this is subtle as a TB may span two physical pages */ |
| if (n == 0) { |
| /* NOTE: tb_end may be after the end of the page, but |
| it is not a problem */ |
| tb_start = tb->pc & ~TARGET_PAGE_MASK; |
| tb_end = tb_start + tb->size; |
| if (tb_end > TARGET_PAGE_SIZE) |
| tb_end = TARGET_PAGE_SIZE; |
| } else { |
| tb_start = 0; |
| tb_end = ((tb->pc + tb->size) & ~TARGET_PAGE_MASK); |
| } |
| set_bits(p->code_bitmap, tb_start, tb_end - tb_start); |
| tb = tb->page_next[n]; |
| } |
| } |
| |
| #ifdef TARGET_HAS_PRECISE_SMC |
| |
| static void tb_gen_code(CPUState *env, |
| target_ulong pc, target_ulong cs_base, int flags, |
| int cflags) |
| { |
| TranslationBlock *tb; |
| uint8_t *tc_ptr; |
| target_ulong phys_pc, phys_page2, virt_page2; |
| int code_gen_size; |
| |
| phys_pc = get_phys_addr_code(env, (unsigned long)pc); |
| tb = tb_alloc((unsigned long)pc); |
| if (!tb) { |
| /* flush must be done */ |
| tb_flush(env); |
| /* cannot fail at this point */ |
| tb = tb_alloc((unsigned long)pc); |
| } |
| tc_ptr = code_gen_ptr; |
| tb->tc_ptr = tc_ptr; |
| tb->cs_base = cs_base; |
| tb->flags = flags; |
| tb->cflags = cflags; |
| cpu_gen_code(env, tb, CODE_GEN_MAX_SIZE, &code_gen_size); |
| code_gen_ptr = (void *)(((unsigned long)code_gen_ptr + code_gen_size + CODE_GEN_ALIGN - 1) & ~(CODE_GEN_ALIGN - 1)); |
| |
| /* check next page if needed */ |
| virt_page2 = ((unsigned long)pc + tb->size - 1) & TARGET_PAGE_MASK; |
| phys_page2 = -1; |
| if (((unsigned long)pc & TARGET_PAGE_MASK) != virt_page2) { |
| phys_page2 = get_phys_addr_code(env, virt_page2); |
| } |
| tb_link_phys(tb, phys_pc, phys_page2); |
| } |
| #endif |
| |
| /* invalidate all TBs which intersect with the target physical page |
| starting in range [start;end[. NOTE: start and end must refer to |
| the same physical page. 'is_cpu_write_access' should be true if called |
| from a real cpu write access: the virtual CPU will exit the current |
| TB if code is modified inside this TB. */ |
| void tb_invalidate_phys_page_range(target_ulong start, target_ulong end, |
| int is_cpu_write_access) |
| { |
| int n, current_tb_modified, current_tb_not_found, current_flags; |
| #if defined(TARGET_HAS_PRECISE_SMC) || !defined(CONFIG_USER_ONLY) |
| CPUState *env = cpu_single_env; |
| #endif |
| PageDesc *p; |
| TranslationBlock *tb, *tb_next, *current_tb; |
| target_ulong tb_start, tb_end; |
| target_ulong current_pc, current_cs_base; |
| |
| p = page_find(start >> TARGET_PAGE_BITS); |
| if (!p) |
| return; |
| if (!p->code_bitmap && |
| ++p->code_write_count >= SMC_BITMAP_USE_THRESHOLD && |
| is_cpu_write_access) { |
| /* build code bitmap */ |
| build_page_bitmap(p); |
| } |
| |
| /* we remove all the TBs in the range [start, end[ */ |
| /* XXX: see if in some cases it could be faster to invalidate all the code */ |
| current_tb_not_found = is_cpu_write_access; |
| current_tb_modified = 0; |
| current_tb = NULL; /* avoid warning */ |
| current_pc = 0; /* avoid warning */ |
| current_cs_base = 0; /* avoid warning */ |
| current_flags = 0; /* avoid warning */ |
| tb = p->first_tb; |
| while (tb != NULL) { |
| n = (long)tb & 3; |
| tb = (TranslationBlock *)((long)tb & ~3); |
| tb_next = tb->page_next[n]; |
| /* NOTE: this is subtle as a TB may span two physical pages */ |
| if (n == 0) { |
| /* NOTE: tb_end may be after the end of the page, but |
| it is not a problem */ |
| tb_start = tb->page_addr[0] + (tb->pc & ~TARGET_PAGE_MASK); |
| tb_end = tb_start + tb->size; |
| } else { |
| tb_start = tb->page_addr[1]; |
| tb_end = tb_start + ((tb->pc + tb->size) & ~TARGET_PAGE_MASK); |
| } |
| if (!(tb_end <= start || tb_start >= end)) { |
| #ifdef TARGET_HAS_PRECISE_SMC |
| if (current_tb_not_found) { |
| current_tb_not_found = 0; |
| current_tb = NULL; |
| if (env->mem_write_pc) { |
| /* now we have a real cpu fault */ |
| current_tb = tb_find_pc(env->mem_write_pc); |
| } |
| } |
| if (current_tb == tb && |
| !(current_tb->cflags & CF_SINGLE_INSN)) { |
| /* If we are modifying the current TB, we must stop |
| its execution. We could be more precise by checking |
| that the modification is after the current PC, but it |
| would require a specialized function to partially |
| restore the CPU state */ |
| |
| current_tb_modified = 1; |
| cpu_restore_state(current_tb, env, |
| env->mem_write_pc, NULL); |
| #if defined(TARGET_I386) |
| current_flags = env->hflags; |
| current_flags |= (env->eflags & (IOPL_MASK | TF_MASK | VM_MASK)); |
| current_cs_base = (target_ulong)env->segs[R_CS].base; |
| current_pc = current_cs_base + env->eip; |
| #else |
| #error unsupported CPU |
| #endif |
| } |
| #endif /* TARGET_HAS_PRECISE_SMC */ |
| tb_phys_invalidate(tb, -1); |
| } |
| tb = tb_next; |
| } |
| #if !defined(CONFIG_USER_ONLY) |
| /* if no code remaining, no need to continue to use slow writes */ |
| if (!p->first_tb) { |
| invalidate_page_bitmap(p); |
| if (is_cpu_write_access) { |
| tlb_unprotect_code_phys(env, start, env->mem_write_vaddr); |
| } |
| } |
| #endif |
| #ifdef TARGET_HAS_PRECISE_SMC |
| if (current_tb_modified) { |
| /* we generate a block containing just the instruction |
| modifying the memory. It will ensure that it cannot modify |
| itself */ |
| tb_gen_code(env, current_pc, current_cs_base, current_flags, |
| CF_SINGLE_INSN); |
| cpu_resume_from_signal(env, NULL); |
| } |
| #endif |
| } |
| |
| /* len must be <= 8 and start must be a multiple of len */ |
| static inline void tb_invalidate_phys_page_fast(target_ulong start, int len) |
| { |
| PageDesc *p; |
| int offset, b; |
| #if 0 |
| if (cpu_single_env->cr[0] & CR0_PE_MASK) { |
| printf("modifying code at 0x%x size=%d EIP=%x\n", |
| (vaddr & TARGET_PAGE_MASK) | (start & ~TARGET_PAGE_MASK), len, |
| cpu_single_env->eip); |
| } |
| #endif |
| p = page_find(start >> TARGET_PAGE_BITS); |
| if (!p) |
| return; |
| if (p->code_bitmap) { |
| offset = start & ~TARGET_PAGE_MASK; |
| b = p->code_bitmap[offset >> 3] >> (offset & 7); |
| if (b & ((1 << len) - 1)) |
| goto do_invalidate; |
| } else { |
| do_invalidate: |
| tb_invalidate_phys_page_range(start, start + len, 1); |
| } |
| } |
| |
| #if !defined(CONFIG_SOFTMMU) |
| static void tb_invalidate_phys_page(target_ulong addr, |
| unsigned long pc, void *puc) |
| { |
| int n, current_flags, current_tb_modified; |
| target_ulong current_pc, current_cs_base; |
| PageDesc *p; |
| TranslationBlock *tb, *current_tb; |
| #ifdef TARGET_HAS_PRECISE_SMC |
| CPUState *env = cpu_single_env; |
| #endif |
| |
| addr &= TARGET_PAGE_MASK; |
| p = page_find(addr >> TARGET_PAGE_BITS); |
| if (!p) |
| return; |
| tb = p->first_tb; |
| current_tb_modified = 0; |
| current_tb = NULL; |
| current_pc = 0; /* avoid warning */ |
| current_cs_base = 0; /* avoid warning */ |
| current_flags = 0; /* avoid warning */ |
| #ifdef TARGET_HAS_PRECISE_SMC |
| if (tb && pc != 0) { |
| current_tb = tb_find_pc(pc); |
| } |
| #endif |
| while (tb != NULL) { |
| n = (long)tb & 3; |
| tb = (TranslationBlock *)((long)tb & ~3); |
| #ifdef TARGET_HAS_PRECISE_SMC |
| if (current_tb == tb && |
| !(current_tb->cflags & CF_SINGLE_INSN)) { |
| /* If we are modifying the current TB, we must stop |
| its execution. We could be more precise by checking |
| that the modification is after the current PC, but it |
| would require a specialized function to partially |
| restore the CPU state */ |
| |
| current_tb_modified = 1; |
| cpu_restore_state(current_tb, env, pc, puc); |
| #if defined(TARGET_I386) |
| current_flags = env->hflags; |
| current_flags |= (env->eflags & (IOPL_MASK | TF_MASK | VM_MASK)); |
| current_cs_base = (target_ulong)env->segs[R_CS].base; |
| current_pc = current_cs_base + env->eip; |
| #else |
| #error unsupported CPU |
| #endif |
| } |
| #endif /* TARGET_HAS_PRECISE_SMC */ |
| tb_phys_invalidate(tb, addr); |
| tb = tb->page_next[n]; |
| } |
| p->first_tb = NULL; |
| #ifdef TARGET_HAS_PRECISE_SMC |
| if (current_tb_modified) { |
| /* we generate a block containing just the instruction |
| modifying the memory. It will ensure that it cannot modify |
| itself */ |
| tb_gen_code(env, current_pc, current_cs_base, current_flags, |
| CF_SINGLE_INSN); |
| cpu_resume_from_signal(env, puc); |
| } |
| #endif |
| } |
| #endif |
| |
| /* add the tb in the target page and protect it if necessary */ |
| static inline void tb_alloc_page(TranslationBlock *tb, |
| unsigned int n, unsigned int page_addr) |
| { |
| PageDesc *p; |
| TranslationBlock *last_first_tb; |
| |
| tb->page_addr[n] = page_addr; |
| p = page_find(page_addr >> TARGET_PAGE_BITS); |
| tb->page_next[n] = p->first_tb; |
| last_first_tb = p->first_tb; |
| p->first_tb = (TranslationBlock *)((long)tb | n); |
| invalidate_page_bitmap(p); |
| |
| #ifdef TARGET_HAS_SMC |
| |
| #if defined(CONFIG_USER_ONLY) |
| if (p->flags & PAGE_WRITE) { |
| unsigned long host_start, host_end, addr; |
| int prot; |
| |
| /* force the host page as non writable (writes will have a |
| page fault + mprotect overhead) */ |
| host_start = page_addr & host_page_mask; |
| host_end = host_start + host_page_size; |
| prot = 0; |
| for(addr = host_start; addr < host_end; addr += TARGET_PAGE_SIZE) |
| prot |= page_get_flags(addr); |
| mprotect((void *)host_start, host_page_size, |
| (prot & PAGE_BITS) & ~PAGE_WRITE); |
| #ifdef DEBUG_TB_INVALIDATE |
| printf("protecting code page: 0x%08lx\n", |
| host_start); |
| #endif |
| p->flags &= ~PAGE_WRITE; |
| } |
| #else |
| /* if some code is already present, then the pages are already |
| protected. So we handle the case where only the first TB is |
| allocated in a physical page */ |
| if (!last_first_tb) { |
| target_ulong virt_addr; |
| |
| virt_addr = (tb->pc & TARGET_PAGE_MASK) + (n << TARGET_PAGE_BITS); |
| tlb_protect_code(cpu_single_env, virt_addr); |
| } |
| #endif |
| |
| #endif /* TARGET_HAS_SMC */ |
| } |
| |
| /* Allocate a new translation block. Flush the translation buffer if |
| too many translation blocks or too much generated code. */ |
| TranslationBlock *tb_alloc(unsigned long pc) |
| { |
| TranslationBlock *tb; |
| |
| if (nb_tbs >= CODE_GEN_MAX_BLOCKS || |
| (code_gen_ptr - code_gen_buffer) >= CODE_GEN_BUFFER_MAX_SIZE) |
| return NULL; |
| tb = &tbs[nb_tbs++]; |
| tb->pc = pc; |
| tb->cflags = 0; |
| return tb; |
| } |
| |
| /* add a new TB and link it to the physical page tables. phys_page2 is |
| (-1) to indicate that only one page contains the TB. */ |
| void tb_link_phys(TranslationBlock *tb, |
| target_ulong phys_pc, target_ulong phys_page2) |
| { |
| unsigned int h; |
| TranslationBlock **ptb; |
| |
| /* add in the physical hash table */ |
| h = tb_phys_hash_func(phys_pc); |
| ptb = &tb_phys_hash[h]; |
| tb->phys_hash_next = *ptb; |
| *ptb = tb; |
| |
| /* add in the page list */ |
| tb_alloc_page(tb, 0, phys_pc & TARGET_PAGE_MASK); |
| if (phys_page2 != -1) |
| tb_alloc_page(tb, 1, phys_page2); |
| else |
| tb->page_addr[1] = -1; |
| #ifdef DEBUG_TB_CHECK |
| tb_page_check(); |
| #endif |
| } |
| |
| /* link the tb with the other TBs */ |
| void tb_link(TranslationBlock *tb) |
| { |
| #if !defined(CONFIG_USER_ONLY) |
| { |
| VirtPageDesc *vp; |
| target_ulong addr; |
| |
| /* save the code memory mappings (needed to invalidate the code) */ |
| addr = tb->pc & TARGET_PAGE_MASK; |
| vp = virt_page_find_alloc(addr >> TARGET_PAGE_BITS); |
| #ifdef DEBUG_TLB_CHECK |
| if (vp->valid_tag == virt_valid_tag && |
| vp->phys_addr != tb->page_addr[0]) { |
| printf("Error tb addr=0x%x phys=0x%x vp->phys_addr=0x%x\n", |
| addr, tb->page_addr[0], vp->phys_addr); |
| } |
| #endif |
| vp->phys_addr = tb->page_addr[0]; |
| if (vp->valid_tag != virt_valid_tag) { |
| vp->valid_tag = virt_valid_tag; |
| #if !defined(CONFIG_SOFTMMU) |
| vp->prot = 0; |
| #endif |
| } |
| |
| if (tb->page_addr[1] != -1) { |
| addr += TARGET_PAGE_SIZE; |
| vp = virt_page_find_alloc(addr >> TARGET_PAGE_BITS); |
| #ifdef DEBUG_TLB_CHECK |
| if (vp->valid_tag == virt_valid_tag && |
| vp->phys_addr != tb->page_addr[1]) { |
| printf("Error tb addr=0x%x phys=0x%x vp->phys_addr=0x%x\n", |
| addr, tb->page_addr[1], vp->phys_addr); |
| } |
| #endif |
| vp->phys_addr = tb->page_addr[1]; |
| if (vp->valid_tag != virt_valid_tag) { |
| vp->valid_tag = virt_valid_tag; |
| #if !defined(CONFIG_SOFTMMU) |
| vp->prot = 0; |
| #endif |
| } |
| } |
| } |
| #endif |
| |
| tb->jmp_first = (TranslationBlock *)((long)tb | 2); |
| tb->jmp_next[0] = NULL; |
| tb->jmp_next[1] = NULL; |
| #ifdef USE_CODE_COPY |
| tb->cflags &= ~CF_FP_USED; |
| if (tb->cflags & CF_TB_FP_USED) |
| tb->cflags |= CF_FP_USED; |
| #endif |
| |
| /* init original jump addresses */ |
| if (tb->tb_next_offset[0] != 0xffff) |
| tb_reset_jump(tb, 0); |
| if (tb->tb_next_offset[1] != 0xffff) |
| tb_reset_jump(tb, 1); |
| } |
| |
| /* find the TB 'tb' such that tb[0].tc_ptr <= tc_ptr < |
| tb[1].tc_ptr. Return NULL if not found */ |
| TranslationBlock *tb_find_pc(unsigned long tc_ptr) |
| { |
| int m_min, m_max, m; |
| unsigned long v; |
| TranslationBlock *tb; |
| |
| if (nb_tbs <= 0) |
| return NULL; |
| if (tc_ptr < (unsigned long)code_gen_buffer || |
| tc_ptr >= (unsigned long)code_gen_ptr) |
| return NULL; |
| /* binary search (cf Knuth) */ |
| m_min = 0; |
| m_max = nb_tbs - 1; |
| while (m_min <= m_max) { |
| m = (m_min + m_max) >> 1; |
| tb = &tbs[m]; |
| v = (unsigned long)tb->tc_ptr; |
| if (v == tc_ptr) |
| return tb; |
| else if (tc_ptr < v) { |
| m_max = m - 1; |
| } else { |
| m_min = m + 1; |
| } |
| } |
| return &tbs[m_max]; |
| } |
| |
| static void tb_reset_jump_recursive(TranslationBlock *tb); |
| |
| static inline void tb_reset_jump_recursive2(TranslationBlock *tb, int n) |
| { |
| TranslationBlock *tb1, *tb_next, **ptb; |
| unsigned int n1; |
| |
| tb1 = tb->jmp_next[n]; |
| if (tb1 != NULL) { |
| /* find head of list */ |
| for(;;) { |
| n1 = (long)tb1 & 3; |
| tb1 = (TranslationBlock *)((long)tb1 & ~3); |
| if (n1 == 2) |
| break; |
| tb1 = tb1->jmp_next[n1]; |
| } |
| /* we are now sure now that tb jumps to tb1 */ |
| tb_next = tb1; |
| |
| /* remove tb from the jmp_first list */ |
| ptb = &tb_next->jmp_first; |
| for(;;) { |
| tb1 = *ptb; |
| n1 = (long)tb1 & 3; |
| tb1 = (TranslationBlock *)((long)tb1 & ~3); |
| if (n1 == n && tb1 == tb) |
| break; |
| ptb = &tb1->jmp_next[n1]; |
| } |
| *ptb = tb->jmp_next[n]; |
| tb->jmp_next[n] = NULL; |
| |
| /* suppress the jump to next tb in generated code */ |
| tb_reset_jump(tb, n); |
| |
| /* suppress jumps in the tb on which we could have jumped */ |
| tb_reset_jump_recursive(tb_next); |
| } |
| } |
| |
| static void tb_reset_jump_recursive(TranslationBlock *tb) |
| { |
| tb_reset_jump_recursive2(tb, 0); |
| tb_reset_jump_recursive2(tb, 1); |
| } |
| |
| static void breakpoint_invalidate(CPUState *env, target_ulong pc) |
| { |
| target_ulong phys_addr; |
| |
| phys_addr = cpu_get_phys_page_debug(env, pc); |
| tb_invalidate_phys_page_range(phys_addr, phys_addr + 1, 0); |
| } |
| |
| /* add a breakpoint. EXCP_DEBUG is returned by the CPU loop if a |
| breakpoint is reached */ |
| int cpu_breakpoint_insert(CPUState *env, target_ulong pc) |
| { |
| #if defined(TARGET_I386) || defined(TARGET_PPC) |
| int i; |
| |
| for(i = 0; i < env->nb_breakpoints; i++) { |
| if (env->breakpoints[i] == pc) |
| return 0; |
| } |
| |
| if (env->nb_breakpoints >= MAX_BREAKPOINTS) |
| return -1; |
| env->breakpoints[env->nb_breakpoints++] = pc; |
| |
| breakpoint_invalidate(env, pc); |
| return 0; |
| #else |
| return -1; |
| #endif |
| } |
| |
| /* remove a breakpoint */ |
| int cpu_breakpoint_remove(CPUState *env, target_ulong pc) |
| { |
| #if defined(TARGET_I386) || defined(TARGET_PPC) |
| int i; |
| for(i = 0; i < env->nb_breakpoints; i++) { |
| if (env->breakpoints[i] == pc) |
| goto found; |
| } |
| return -1; |
| found: |
| memmove(&env->breakpoints[i], &env->breakpoints[i + 1], |
| (env->nb_breakpoints - (i + 1)) * sizeof(env->breakpoints[0])); |
| env->nb_breakpoints--; |
| |
| breakpoint_invalidate(env, pc); |
| return 0; |
| #else |
| return -1; |
| #endif |
| } |
| |
| /* enable or disable single step mode. EXCP_DEBUG is returned by the |
| CPU loop after each instruction */ |
| void cpu_single_step(CPUState *env, int enabled) |
| { |
| #if defined(TARGET_I386) || defined(TARGET_PPC) |
| if (env->singlestep_enabled != enabled) { |
| env->singlestep_enabled = enabled; |
| /* must flush all the translated code to avoid inconsistancies */ |
| /* XXX: only flush what is necessary */ |
| tb_flush(env); |
| } |
| #endif |
| } |
| |
| /* enable or disable low levels log */ |
| void cpu_set_log(int log_flags) |
| { |
| loglevel = log_flags; |
| if (loglevel && !logfile) { |
| logfile = fopen(logfilename, "w"); |
| if (!logfile) { |
| perror(logfilename); |
| _exit(1); |
| } |
| #if !defined(CONFIG_SOFTMMU) |
| /* must avoid mmap() usage of glibc by setting a buffer "by hand" */ |
| { |
| static uint8_t logfile_buf[4096]; |
| setvbuf(logfile, logfile_buf, _IOLBF, sizeof(logfile_buf)); |
| } |
| #else |
| setvbuf(logfile, NULL, _IOLBF, 0); |
| #endif |
| } |
| } |
| |
| void cpu_set_log_filename(const char *filename) |
| { |
| logfilename = strdup(filename); |
| } |
| |
| /* mask must never be zero, except for A20 change call */ |
| void cpu_interrupt(CPUState *env, int mask) |
| { |
| TranslationBlock *tb; |
| static int interrupt_lock; |
| |
| env->interrupt_request |= mask; |
| /* if the cpu is currently executing code, we must unlink it and |
| all the potentially executing TB */ |
| tb = env->current_tb; |
| if (tb && !testandset(&interrupt_lock)) { |
| env->current_tb = NULL; |
| tb_reset_jump_recursive(tb); |
| interrupt_lock = 0; |
| } |
| } |
| |
| void cpu_reset_interrupt(CPUState *env, int mask) |
| { |
| env->interrupt_request &= ~mask; |
| } |
| |
| CPULogItem cpu_log_items[] = { |
| { CPU_LOG_TB_OUT_ASM, "out_asm", |
| "show generated host assembly code for each compiled TB" }, |
| { CPU_LOG_TB_IN_ASM, "in_asm", |
| "show target assembly code for each compiled TB" }, |
| { CPU_LOG_TB_OP, "op", |
| "show micro ops for each compiled TB (only usable if 'in_asm' used)" }, |
| #ifdef TARGET_I386 |
| { CPU_LOG_TB_OP_OPT, "op_opt", |
| "show micro ops after optimization for each compiled TB" }, |
| #endif |
| { CPU_LOG_INT, "int", |
| "show interrupts/exceptions in short format" }, |
| { CPU_LOG_EXEC, "exec", |
| "show trace before each executed TB (lots of logs)" }, |
| { CPU_LOG_TB_CPU, "cpu", |
| "show CPU state before bloc translation" }, |
| #ifdef TARGET_I386 |
| { CPU_LOG_PCALL, "pcall", |
| "show protected mode far calls/returns/exceptions" }, |
| #endif |
| { CPU_LOG_IOPORT, "ioport", |
| "show all i/o ports accesses" }, |
| { 0, NULL, NULL }, |
| }; |
| |
| static int cmp1(const char *s1, int n, const char *s2) |
| { |
| if (strlen(s2) != n) |
| return 0; |
| return memcmp(s1, s2, n) == 0; |
| } |
| |
| /* takes a comma separated list of log masks. Return 0 if error. */ |
| int cpu_str_to_log_mask(const char *str) |
| { |
| CPULogItem *item; |
| int mask; |
| const char *p, *p1; |
| |
| p = str; |
| mask = 0; |
| for(;;) { |
| p1 = strchr(p, ','); |
| if (!p1) |
| p1 = p + strlen(p); |
| for(item = cpu_log_items; item->mask != 0; item++) { |
| if (cmp1(p, p1 - p, item->name)) |
| goto found; |
| } |
| return 0; |
| found: |
| mask |= item->mask; |
| if (*p1 != ',') |
| break; |
| p = p1 + 1; |
| } |
| return mask; |
| } |
| |
| void cpu_abort(CPUState *env, const char *fmt, ...) |
| { |
| va_list ap; |
| |
| va_start(ap, fmt); |
| fprintf(stderr, "qemu: fatal: "); |
| vfprintf(stderr, fmt, ap); |
| fprintf(stderr, "\n"); |
| #ifdef TARGET_I386 |
| cpu_x86_dump_state(env, stderr, X86_DUMP_FPU | X86_DUMP_CCOP); |
| #endif |
| va_end(ap); |
| abort(); |
| } |
| |
| #if !defined(CONFIG_USER_ONLY) |
| |
| /* NOTE: if flush_global is true, also flush global entries (not |
| implemented yet) */ |
| void tlb_flush(CPUState *env, int flush_global) |
| { |
| int i; |
| |
| #if defined(DEBUG_TLB) |
| printf("tlb_flush:\n"); |
| #endif |
| /* must reset current TB so that interrupts cannot modify the |
| links while we are modifying them */ |
| env->current_tb = NULL; |
| |
| for(i = 0; i < CPU_TLB_SIZE; i++) { |
| env->tlb_read[0][i].address = -1; |
| env->tlb_write[0][i].address = -1; |
| env->tlb_read[1][i].address = -1; |
| env->tlb_write[1][i].address = -1; |
| } |
| |
| virt_page_flush(); |
| for(i = 0;i < CODE_GEN_HASH_SIZE; i++) |
| tb_hash[i] = NULL; |
| |
| #if !defined(CONFIG_SOFTMMU) |
| munmap((void *)MMAP_AREA_START, MMAP_AREA_END - MMAP_AREA_START); |
| #endif |
| } |
| |
| static inline void tlb_flush_entry(CPUTLBEntry *tlb_entry, target_ulong addr) |
| { |
| if (addr == (tlb_entry->address & |
| (TARGET_PAGE_MASK | TLB_INVALID_MASK))) |
| tlb_entry->address = -1; |
| } |
| |
| void tlb_flush_page(CPUState *env, target_ulong addr) |
| { |
| int i, n; |
| VirtPageDesc *vp; |
| PageDesc *p; |
| TranslationBlock *tb; |
| |
| #if defined(DEBUG_TLB) |
| printf("tlb_flush_page: 0x%08x\n", addr); |
| #endif |
| /* must reset current TB so that interrupts cannot modify the |
| links while we are modifying them */ |
| env->current_tb = NULL; |
| |
| addr &= TARGET_PAGE_MASK; |
| i = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1); |
| tlb_flush_entry(&env->tlb_read[0][i], addr); |
| tlb_flush_entry(&env->tlb_write[0][i], addr); |
| tlb_flush_entry(&env->tlb_read[1][i], addr); |
| tlb_flush_entry(&env->tlb_write[1][i], addr); |
| |
| /* remove from the virtual pc hash table all the TB at this |
| virtual address */ |
| |
| vp = virt_page_find(addr >> TARGET_PAGE_BITS); |
| if (vp && vp->valid_tag == virt_valid_tag) { |
| p = page_find(vp->phys_addr >> TARGET_PAGE_BITS); |
| if (p) { |
| /* we remove all the links to the TBs in this virtual page */ |
| tb = p->first_tb; |
| while (tb != NULL) { |
| n = (long)tb & 3; |
| tb = (TranslationBlock *)((long)tb & ~3); |
| if ((tb->pc & TARGET_PAGE_MASK) == addr || |
| ((tb->pc + tb->size - 1) & TARGET_PAGE_MASK) == addr) { |
| tb_invalidate(tb); |
| } |
| tb = tb->page_next[n]; |
| } |
| } |
| vp->valid_tag = 0; |
| } |
| |
| #if !defined(CONFIG_SOFTMMU) |
| if (addr < MMAP_AREA_END) |
| munmap((void *)addr, TARGET_PAGE_SIZE); |
| #endif |
| } |
| |
| static inline void tlb_protect_code1(CPUTLBEntry *tlb_entry, target_ulong addr) |
| { |
| if (addr == (tlb_entry->address & |
| (TARGET_PAGE_MASK | TLB_INVALID_MASK)) && |
| (tlb_entry->address & ~TARGET_PAGE_MASK) != IO_MEM_CODE && |
| (tlb_entry->address & ~TARGET_PAGE_MASK) != IO_MEM_ROM) { |
| tlb_entry->address = (tlb_entry->address & TARGET_PAGE_MASK) | IO_MEM_CODE; |
| } |
| } |
| |
| /* update the TLBs so that writes to code in the virtual page 'addr' |
| can be detected */ |
| static void tlb_protect_code(CPUState *env, target_ulong addr) |
| { |
| int i; |
| |
| addr &= TARGET_PAGE_MASK; |
| i = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1); |
| tlb_protect_code1(&env->tlb_write[0][i], addr); |
| tlb_protect_code1(&env->tlb_write[1][i], addr); |
| #if !defined(CONFIG_SOFTMMU) |
| /* NOTE: as we generated the code for this page, it is already at |
| least readable */ |
| if (addr < MMAP_AREA_END) |
| mprotect((void *)addr, TARGET_PAGE_SIZE, PROT_READ); |
| #endif |
| } |
| |
| static inline void tlb_unprotect_code2(CPUTLBEntry *tlb_entry, |
| unsigned long phys_addr) |
| { |
| if ((tlb_entry->address & ~TARGET_PAGE_MASK) == IO_MEM_CODE && |
| ((tlb_entry->address & TARGET_PAGE_MASK) + tlb_entry->addend) == phys_addr) { |
| tlb_entry->address = (tlb_entry->address & TARGET_PAGE_MASK) | IO_MEM_NOTDIRTY; |
| } |
| } |
| |
| /* update the TLB so that writes in physical page 'phys_addr' are no longer |
| tested self modifying code */ |
| static void tlb_unprotect_code_phys(CPUState *env, unsigned long phys_addr, target_ulong vaddr) |
| { |
| int i; |
| |
| phys_addr &= TARGET_PAGE_MASK; |
| phys_addr += (long)phys_ram_base; |
| i = (vaddr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1); |
| tlb_unprotect_code2(&env->tlb_write[0][i], phys_addr); |
| tlb_unprotect_code2(&env->tlb_write[1][i], phys_addr); |
| } |
| |
| static inline void tlb_reset_dirty_range(CPUTLBEntry *tlb_entry, |
| unsigned long start, unsigned long length) |
| { |
| unsigned long addr; |
| if ((tlb_entry->address & ~TARGET_PAGE_MASK) == IO_MEM_RAM) { |
| addr = (tlb_entry->address & TARGET_PAGE_MASK) + tlb_entry->addend; |
| if ((addr - start) < length) { |
| tlb_entry->address = (tlb_entry->address & TARGET_PAGE_MASK) | IO_MEM_NOTDIRTY; |
| } |
| } |
| } |
| |
| void cpu_physical_memory_reset_dirty(target_ulong start, target_ulong end) |
| { |
| CPUState *env; |
| unsigned long length, start1; |
| int i; |
| |
| start &= TARGET_PAGE_MASK; |
| end = TARGET_PAGE_ALIGN(end); |
| |
| length = end - start; |
| if (length == 0) |
| return; |
| memset(phys_ram_dirty + (start >> TARGET_PAGE_BITS), 0, length >> TARGET_PAGE_BITS); |
| |
| env = cpu_single_env; |
| /* we modify the TLB cache so that the dirty bit will be set again |
| when accessing the range */ |
| start1 = start + (unsigned long)phys_ram_base; |
| for(i = 0; i < CPU_TLB_SIZE; i++) |
| tlb_reset_dirty_range(&env->tlb_write[0][i], start1, length); |
| for(i = 0; i < CPU_TLB_SIZE; i++) |
| tlb_reset_dirty_range(&env->tlb_write[1][i], start1, length); |
| |
| #if !defined(CONFIG_SOFTMMU) |
| /* XXX: this is expensive */ |
| { |
| VirtPageDesc *p; |
| int j; |
| target_ulong addr; |
| |
| for(i = 0; i < L1_SIZE; i++) { |
| p = l1_virt_map[i]; |
| if (p) { |
| addr = i << (TARGET_PAGE_BITS + L2_BITS); |
| for(j = 0; j < L2_SIZE; j++) { |
| if (p->valid_tag == virt_valid_tag && |
| p->phys_addr >= start && p->phys_addr < end && |
| (p->prot & PROT_WRITE)) { |
| if (addr < MMAP_AREA_END) { |
| mprotect((void *)addr, TARGET_PAGE_SIZE, |
| p->prot & ~PROT_WRITE); |
| } |
| } |
| addr += TARGET_PAGE_SIZE; |
| p++; |
| } |
| } |
| } |
| } |
| #endif |
| } |
| |
| static inline void tlb_set_dirty1(CPUTLBEntry *tlb_entry, |
| unsigned long start) |
| { |
| unsigned long addr; |
| if ((tlb_entry->address & ~TARGET_PAGE_MASK) == IO_MEM_NOTDIRTY) { |
| addr = (tlb_entry->address & TARGET_PAGE_MASK) + tlb_entry->addend; |
| if (addr == start) { |
| tlb_entry->address = (tlb_entry->address & TARGET_PAGE_MASK) | IO_MEM_RAM; |
| } |
| } |
| } |
| |
| /* update the TLB corresponding to virtual page vaddr and phys addr |
| addr so that it is no longer dirty */ |
| static inline void tlb_set_dirty(unsigned long addr, target_ulong vaddr) |
| { |
| CPUState *env = cpu_single_env; |
| int i; |
| |
| phys_ram_dirty[(addr - (unsigned long)phys_ram_base) >> TARGET_PAGE_BITS] = 1; |
| |
| addr &= TARGET_PAGE_MASK; |
| i = (vaddr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1); |
| tlb_set_dirty1(&env->tlb_write[0][i], addr); |
| tlb_set_dirty1(&env->tlb_write[1][i], addr); |
| } |
| |
| /* add a new TLB entry. At most one entry for a given virtual address |
| is permitted. Return 0 if OK or 2 if the page could not be mapped |
| (can only happen in non SOFTMMU mode for I/O pages or pages |
| conflicting with the host address space). */ |
| int tlb_set_page(CPUState *env, target_ulong vaddr, |
| target_phys_addr_t paddr, int prot, |
| int is_user, int is_softmmu) |
| { |
| PageDesc *p; |
| unsigned long pd; |
| TranslationBlock *first_tb; |
| unsigned int index; |
| target_ulong address; |
| unsigned long addend; |
| int ret; |
| |
| p = page_find(paddr >> TARGET_PAGE_BITS); |
| if (!p) { |
| pd = IO_MEM_UNASSIGNED; |
| first_tb = NULL; |
| } else { |
| pd = p->phys_offset; |
| first_tb = p->first_tb; |
| } |
| #if defined(DEBUG_TLB) |
| printf("tlb_set_page: vaddr=0x%08x paddr=0x%08x prot=%x u=%d c=%d smmu=%d pd=0x%08x\n", |
| vaddr, paddr, prot, is_user, (first_tb != NULL), is_softmmu, pd); |
| #endif |
| |
| ret = 0; |
| #if !defined(CONFIG_SOFTMMU) |
| if (is_softmmu) |
| #endif |
| { |
| if ((pd & ~TARGET_PAGE_MASK) > IO_MEM_ROM) { |
| /* IO memory case */ |
| address = vaddr | pd; |
| addend = paddr; |
| } else { |
| /* standard memory */ |
| address = vaddr; |
| addend = (unsigned long)phys_ram_base + (pd & TARGET_PAGE_MASK); |
| } |
| |
| index = (vaddr >> 12) & (CPU_TLB_SIZE - 1); |
| addend -= vaddr; |
| if (prot & PAGE_READ) { |
| env->tlb_read[is_user][index].address = address; |
| env->tlb_read[is_user][index].addend = addend; |
| } else { |
| env->tlb_read[is_user][index].address = -1; |
| env->tlb_read[is_user][index].addend = -1; |
| } |
| if (prot & PAGE_WRITE) { |
| if ((pd & ~TARGET_PAGE_MASK) == IO_MEM_ROM) { |
| /* ROM: access is ignored (same as unassigned) */ |
| env->tlb_write[is_user][index].address = vaddr | IO_MEM_ROM; |
| env->tlb_write[is_user][index].addend = addend; |
| } else |
| /* XXX: the PowerPC code seems not ready to handle |
| self modifying code with DCBI */ |
| #if defined(TARGET_HAS_SMC) || 1 |
| if (first_tb) { |
| /* if code is present, we use a specific memory |
| handler. It works only for physical memory access */ |
| env->tlb_write[is_user][index].address = vaddr | IO_MEM_CODE; |
| env->tlb_write[is_user][index].addend = addend; |
| } else |
| #endif |
| if ((pd & ~TARGET_PAGE_MASK) == IO_MEM_RAM && |
| !cpu_physical_memory_is_dirty(pd)) { |
| env->tlb_write[is_user][index].address = vaddr | IO_MEM_NOTDIRTY; |
| env->tlb_write[is_user][index].addend = addend; |
| } else { |
| env->tlb_write[is_user][index].address = address; |
| env->tlb_write[is_user][index].addend = addend; |
| } |
| } else { |
| env->tlb_write[is_user][index].address = -1; |
| env->tlb_write[is_user][index].addend = -1; |
| } |
| } |
| #if !defined(CONFIG_SOFTMMU) |
| else { |
| if ((pd & ~TARGET_PAGE_MASK) > IO_MEM_ROM) { |
| /* IO access: no mapping is done as it will be handled by the |
| soft MMU */ |
| if (!(env->hflags & HF_SOFTMMU_MASK)) |
| ret = 2; |
| } else { |
| void *map_addr; |
| |
| if (vaddr >= MMAP_AREA_END) { |
| ret = 2; |
| } else { |
| if (prot & PROT_WRITE) { |
| if ((pd & ~TARGET_PAGE_MASK) == IO_MEM_ROM || |
| #if defined(TARGET_HAS_SMC) || 1 |
| first_tb || |
| #endif |
| ((pd & ~TARGET_PAGE_MASK) == IO_MEM_RAM && |
| !cpu_physical_memory_is_dirty(pd))) { |
| /* ROM: we do as if code was inside */ |
| /* if code is present, we only map as read only and save the |
| original mapping */ |
| VirtPageDesc *vp; |
| |
| vp = virt_page_find_alloc(vaddr >> TARGET_PAGE_BITS); |
| vp->phys_addr = pd; |
| vp->prot = prot; |
| vp->valid_tag = virt_valid_tag; |
| prot &= ~PAGE_WRITE; |
| } |
| } |
| map_addr = mmap((void *)vaddr, TARGET_PAGE_SIZE, prot, |
| MAP_SHARED | MAP_FIXED, phys_ram_fd, (pd & TARGET_PAGE_MASK)); |
| if (map_addr == MAP_FAILED) { |
| cpu_abort(env, "mmap failed when mapped physical address 0x%08x to virtual address 0x%08x\n", |
| paddr, vaddr); |
| } |
| } |
| } |
| } |
| #endif |
| return ret; |
| } |
| |
| /* called from signal handler: invalidate the code and unprotect the |
| page. Return TRUE if the fault was succesfully handled. */ |
| int page_unprotect(unsigned long addr, unsigned long pc, void *puc) |
| { |
| #if !defined(CONFIG_SOFTMMU) |
| VirtPageDesc *vp; |
| |
| #if defined(DEBUG_TLB) |
| printf("page_unprotect: addr=0x%08x\n", addr); |
| #endif |
| addr &= TARGET_PAGE_MASK; |
| |
| /* if it is not mapped, no need to worry here */ |
| if (addr >= MMAP_AREA_END) |
| return 0; |
| vp = virt_page_find(addr >> TARGET_PAGE_BITS); |
| if (!vp) |
| return 0; |
| /* NOTE: in this case, validate_tag is _not_ tested as it |
| validates only the code TLB */ |
| if (vp->valid_tag != virt_valid_tag) |
| return 0; |
| if (!(vp->prot & PAGE_WRITE)) |
| return 0; |
| #if defined(DEBUG_TLB) |
| printf("page_unprotect: addr=0x%08x phys_addr=0x%08x prot=%x\n", |
| addr, vp->phys_addr, vp->prot); |
| #endif |
| if (mprotect((void *)addr, TARGET_PAGE_SIZE, vp->prot) < 0) |
| cpu_abort(cpu_single_env, "error mprotect addr=0x%lx prot=%d\n", |
| (unsigned long)addr, vp->prot); |
| /* set the dirty bit */ |
| phys_ram_dirty[vp->phys_addr >> TARGET_PAGE_BITS] = 1; |
| /* flush the code inside */ |
| tb_invalidate_phys_page(vp->phys_addr, pc, puc); |
| return 1; |
| #else |
| return 0; |
| #endif |
| } |
| |
| #else |
| |
| void tlb_flush(CPUState *env, int flush_global) |
| { |
| } |
| |
| void tlb_flush_page(CPUState *env, target_ulong addr) |
| { |
| } |
| |
| int tlb_set_page(CPUState *env, target_ulong vaddr, |
| target_phys_addr_t paddr, int prot, |
| int is_user, int is_softmmu) |
| { |
| return 0; |
| } |
| |
| /* dump memory mappings */ |
| void page_dump(FILE *f) |
| { |
| unsigned long start, end; |
| int i, j, prot, prot1; |
| PageDesc *p; |
| |
| fprintf(f, "%-8s %-8s %-8s %s\n", |
| "start", "end", "size", "prot"); |
| start = -1; |
| end = -1; |
| prot = 0; |
| for(i = 0; i <= L1_SIZE; i++) { |
| if (i < L1_SIZE) |
| p = l1_map[i]; |
| else |
| p = NULL; |
| for(j = 0;j < L2_SIZE; j++) { |
| if (!p) |
| prot1 = 0; |
| else |
| prot1 = p[j].flags; |
| if (prot1 != prot) { |
| end = (i << (32 - L1_BITS)) | (j << TARGET_PAGE_BITS); |
| if (start != -1) { |
| fprintf(f, "%08lx-%08lx %08lx %c%c%c\n", |
| start, end, end - start, |
| prot & PAGE_READ ? 'r' : '-', |
| prot & PAGE_WRITE ? 'w' : '-', |
| prot & PAGE_EXEC ? 'x' : '-'); |
| } |
| if (prot1 != 0) |
| start = end; |
| else |
| start = -1; |
| prot = prot1; |
| } |
| if (!p) |
| break; |
| } |
| } |
| } |
| |
| int page_get_flags(unsigned long address) |
| { |
| PageDesc *p; |
| |
| p = page_find(address >> TARGET_PAGE_BITS); |
| if (!p) |
| return 0; |
| return p->flags; |
| } |
| |
| /* modify the flags of a page and invalidate the code if |
| necessary. The flag PAGE_WRITE_ORG is positionned automatically |
| depending on PAGE_WRITE */ |
| void page_set_flags(unsigned long start, unsigned long end, int flags) |
| { |
| PageDesc *p; |
| unsigned long addr; |
| |
| start = start & TARGET_PAGE_MASK; |
| end = TARGET_PAGE_ALIGN(end); |
| if (flags & PAGE_WRITE) |
| flags |= PAGE_WRITE_ORG; |
| spin_lock(&tb_lock); |
| for(addr = start; addr < end; addr += TARGET_PAGE_SIZE) { |
| p = page_find_alloc(addr >> TARGET_PAGE_BITS); |
| /* if the write protection is set, then we invalidate the code |
| inside */ |
| if (!(p->flags & PAGE_WRITE) && |
| (flags & PAGE_WRITE) && |
| p->first_tb) { |
| tb_invalidate_phys_page(addr, 0, NULL); |
| } |
| p->flags = flags; |
| } |
| spin_unlock(&tb_lock); |
| } |
| |
| /* called from signal handler: invalidate the code and unprotect the |
| page. Return TRUE if the fault was succesfully handled. */ |
| int page_unprotect(unsigned long address, unsigned long pc, void *puc) |
| { |
| unsigned int page_index, prot, pindex; |
| PageDesc *p, *p1; |
| unsigned long host_start, host_end, addr; |
| |
| host_start = address & host_page_mask; |
| page_index = host_start >> TARGET_PAGE_BITS; |
| p1 = page_find(page_index); |
| if (!p1) |
| return 0; |
| host_end = host_start + host_page_size; |
| p = p1; |
| prot = 0; |
| for(addr = host_start;addr < host_end; addr += TARGET_PAGE_SIZE) { |
| prot |= p->flags; |
| p++; |
| } |
| /* if the page was really writable, then we change its |
| protection back to writable */ |
| if (prot & PAGE_WRITE_ORG) { |
| pindex = (address - host_start) >> TARGET_PAGE_BITS; |
| if (!(p1[pindex].flags & PAGE_WRITE)) { |
| mprotect((void *)host_start, host_page_size, |
| (prot & PAGE_BITS) | PAGE_WRITE); |
| p1[pindex].flags |= PAGE_WRITE; |
| /* and since the content will be modified, we must invalidate |
| the corresponding translated code. */ |
| tb_invalidate_phys_page(address, pc, puc); |
| #ifdef DEBUG_TB_CHECK |
| tb_invalidate_check(address); |
| #endif |
| return 1; |
| } |
| } |
| return 0; |
| } |
| |
| /* call this function when system calls directly modify a memory area */ |
| void page_unprotect_range(uint8_t *data, unsigned long data_size) |
| { |
| unsigned long start, end, addr; |
| |
| start = (unsigned long)data; |
| end = start + data_size; |
| start &= TARGET_PAGE_MASK; |
| end = TARGET_PAGE_ALIGN(end); |
| for(addr = start; addr < end; addr += TARGET_PAGE_SIZE) { |
| page_unprotect(addr, 0, NULL); |
| } |
| } |
| |
| static inline void tlb_set_dirty(unsigned long addr, target_ulong vaddr) |
| { |
| } |
| #endif /* defined(CONFIG_USER_ONLY) */ |
| |
| /* register physical memory. 'size' must be a multiple of the target |
| page size. If (phys_offset & ~TARGET_PAGE_MASK) != 0, then it is an |
| io memory page */ |
| void cpu_register_physical_memory(target_phys_addr_t start_addr, |
| unsigned long size, |
| unsigned long phys_offset) |
| { |
| unsigned long addr, end_addr; |
| PageDesc *p; |
| |
| end_addr = start_addr + size; |
| for(addr = start_addr; addr < end_addr; addr += TARGET_PAGE_SIZE) { |
| p = page_find_alloc(addr >> TARGET_PAGE_BITS); |
| p->phys_offset = phys_offset; |
| if ((phys_offset & ~TARGET_PAGE_MASK) <= IO_MEM_ROM) |
| phys_offset += TARGET_PAGE_SIZE; |
| } |
| } |
| |
| static uint32_t unassigned_mem_readb(target_phys_addr_t addr) |
| { |
| return 0; |
| } |
| |
| static void unassigned_mem_writeb(target_phys_addr_t addr, uint32_t val) |
| { |
| } |
| |
| static CPUReadMemoryFunc *unassigned_mem_read[3] = { |
| unassigned_mem_readb, |
| unassigned_mem_readb, |
| unassigned_mem_readb, |
| }; |
| |
| static CPUWriteMemoryFunc *unassigned_mem_write[3] = { |
| unassigned_mem_writeb, |
| unassigned_mem_writeb, |
| unassigned_mem_writeb, |
| }; |
| |
| /* self modifying code support in soft mmu mode : writing to a page |
| containing code comes to these functions */ |
| |
| static void code_mem_writeb(target_phys_addr_t addr, uint32_t val) |
| { |
| unsigned long phys_addr; |
| |
| phys_addr = addr - (unsigned long)phys_ram_base; |
| #if !defined(CONFIG_USER_ONLY) |
| tb_invalidate_phys_page_fast(phys_addr, 1); |
| #endif |
| stb_raw((uint8_t *)addr, val); |
| phys_ram_dirty[phys_addr >> TARGET_PAGE_BITS] = 1; |
| } |
| |
| static void code_mem_writew(target_phys_addr_t addr, uint32_t val) |
| { |
| unsigned long phys_addr; |
| |
| phys_addr = addr - (unsigned long)phys_ram_base; |
| #if !defined(CONFIG_USER_ONLY) |
| tb_invalidate_phys_page_fast(phys_addr, 2); |
| #endif |
| stw_raw((uint8_t *)addr, val); |
| phys_ram_dirty[phys_addr >> TARGET_PAGE_BITS] = 1; |
| } |
| |
| static void code_mem_writel(target_phys_addr_t addr, uint32_t val) |
| { |
| unsigned long phys_addr; |
| |
| phys_addr = addr - (unsigned long)phys_ram_base; |
| #if !defined(CONFIG_USER_ONLY) |
| tb_invalidate_phys_page_fast(phys_addr, 4); |
| #endif |
| stl_raw((uint8_t *)addr, val); |
| phys_ram_dirty[phys_addr >> TARGET_PAGE_BITS] = 1; |
| } |
| |
| static CPUReadMemoryFunc *code_mem_read[3] = { |
| NULL, /* never used */ |
| NULL, /* never used */ |
| NULL, /* never used */ |
| }; |
| |
| static CPUWriteMemoryFunc *code_mem_write[3] = { |
| code_mem_writeb, |
| code_mem_writew, |
| code_mem_writel, |
| }; |
| |
| static void notdirty_mem_writeb(target_phys_addr_t addr, uint32_t val) |
| { |
| stb_raw((uint8_t *)addr, val); |
| tlb_set_dirty(addr, cpu_single_env->mem_write_vaddr); |
| } |
| |
| static void notdirty_mem_writew(target_phys_addr_t addr, uint32_t val) |
| { |
| stw_raw((uint8_t *)addr, val); |
| tlb_set_dirty(addr, cpu_single_env->mem_write_vaddr); |
| } |
| |
| static void notdirty_mem_writel(target_phys_addr_t addr, uint32_t val) |
| { |
| stl_raw((uint8_t *)addr, val); |
| tlb_set_dirty(addr, cpu_single_env->mem_write_vaddr); |
| } |
| |
| static CPUWriteMemoryFunc *notdirty_mem_write[3] = { |
| notdirty_mem_writeb, |
| notdirty_mem_writew, |
| notdirty_mem_writel, |
| }; |
| |
| static void io_mem_init(void) |
| { |
| cpu_register_io_memory(IO_MEM_ROM >> IO_MEM_SHIFT, code_mem_read, unassigned_mem_write); |
| cpu_register_io_memory(IO_MEM_UNASSIGNED >> IO_MEM_SHIFT, unassigned_mem_read, unassigned_mem_write); |
| cpu_register_io_memory(IO_MEM_CODE >> IO_MEM_SHIFT, code_mem_read, code_mem_write); |
| cpu_register_io_memory(IO_MEM_NOTDIRTY >> IO_MEM_SHIFT, code_mem_read, notdirty_mem_write); |
| io_mem_nb = 5; |
| |
| /* alloc dirty bits array */ |
| phys_ram_dirty = qemu_malloc(phys_ram_size >> TARGET_PAGE_BITS); |
| } |
| |
| /* mem_read and mem_write are arrays of functions containing the |
| function to access byte (index 0), word (index 1) and dword (index |
| 2). All functions must be supplied. If io_index is non zero, the |
| corresponding io zone is modified. If it is zero, a new io zone is |
| allocated. The return value can be used with |
| cpu_register_physical_memory(). (-1) is returned if error. */ |
| int cpu_register_io_memory(int io_index, |
| CPUReadMemoryFunc **mem_read, |
| CPUWriteMemoryFunc **mem_write) |
| { |
| int i; |
| |
| if (io_index <= 0) { |
| if (io_index >= IO_MEM_NB_ENTRIES) |
| return -1; |
| io_index = io_mem_nb++; |
| } else { |
| if (io_index >= IO_MEM_NB_ENTRIES) |
| return -1; |
| } |
| |
| for(i = 0;i < 3; i++) { |
| io_mem_read[io_index][i] = mem_read[i]; |
| io_mem_write[io_index][i] = mem_write[i]; |
| } |
| return io_index << IO_MEM_SHIFT; |
| } |
| |
| /* physical memory access (slow version, mainly for debug) */ |
| #if defined(CONFIG_USER_ONLY) |
| void cpu_physical_memory_rw(target_phys_addr_t addr, uint8_t *buf, |
| int len, int is_write) |
| { |
| int l, flags; |
| target_ulong page; |
| |
| while (len > 0) { |
| page = addr & TARGET_PAGE_MASK; |
| l = (page + TARGET_PAGE_SIZE) - addr; |
| if (l > len) |
| l = len; |
| flags = page_get_flags(page); |
| if (!(flags & PAGE_VALID)) |
| return; |
| if (is_write) { |
| if (!(flags & PAGE_WRITE)) |
| return; |
| memcpy((uint8_t *)addr, buf, len); |
| } else { |
| if (!(flags & PAGE_READ)) |
| return; |
| memcpy(buf, (uint8_t *)addr, len); |
| } |
| len -= l; |
| buf += l; |
| addr += l; |
| } |
| } |
| #else |
| void cpu_physical_memory_rw(target_phys_addr_t addr, uint8_t *buf, |
| int len, int is_write) |
| { |
| int l, io_index; |
| uint8_t *ptr; |
| uint32_t val; |
| target_phys_addr_t page; |
| unsigned long pd; |
| PageDesc *p; |
| |
| while (len > 0) { |
| page = addr & TARGET_PAGE_MASK; |
| l = (page + TARGET_PAGE_SIZE) - addr; |
| if (l > len) |
| l = len; |
| p = page_find(page >> TARGET_PAGE_BITS); |
| if (!p) { |
| pd = IO_MEM_UNASSIGNED; |
| } else { |
| pd = p->phys_offset; |
| } |
| |
| if (is_write) { |
| if ((pd & ~TARGET_PAGE_MASK) != 0) { |
| io_index = (pd >> IO_MEM_SHIFT) & (IO_MEM_NB_ENTRIES - 1); |
| if (l >= 4 && ((addr & 3) == 0)) { |
| /* 32 bit read access */ |
| val = ldl_raw(buf); |
| io_mem_write[io_index][2](addr, val); |
| l = 4; |
| } else if (l >= 2 && ((addr & 1) == 0)) { |
| /* 16 bit read access */ |
| val = lduw_raw(buf); |
| io_mem_write[io_index][1](addr, val); |
| l = 2; |
| } else { |
| /* 8 bit access */ |
| val = ldub_raw(buf); |
| io_mem_write[io_index][0](addr, val); |
| l = 1; |
| } |
| } else { |
| unsigned long addr1; |
| addr1 = (pd & TARGET_PAGE_MASK) + (addr & ~TARGET_PAGE_MASK); |
| /* RAM case */ |
| ptr = phys_ram_base + addr1; |
| memcpy(ptr, buf, l); |
| /* invalidate code */ |
| tb_invalidate_phys_page_range(addr1, addr1 + l, 0); |
| /* set dirty bit */ |
| phys_ram_dirty[page >> TARGET_PAGE_BITS] = 1; |
| } |
| } else { |
| if ((pd & ~TARGET_PAGE_MASK) > IO_MEM_ROM && |
| (pd & ~TARGET_PAGE_MASK) != IO_MEM_CODE) { |
| /* I/O case */ |
| io_index = (pd >> IO_MEM_SHIFT) & (IO_MEM_NB_ENTRIES - 1); |
| if (l >= 4 && ((addr & 3) == 0)) { |
| /* 32 bit read access */ |
| val = io_mem_read[io_index][2](addr); |
| stl_raw(buf, val); |
| l = 4; |
| } else if (l >= 2 && ((addr & 1) == 0)) { |
| /* 16 bit read access */ |
| val = io_mem_read[io_index][1](addr); |
| stw_raw(buf, val); |
| l = 2; |
| } else { |
| /* 8 bit access */ |
| val = io_mem_read[io_index][0](addr); |
| stb_raw(buf, val); |
| l = 1; |
| } |
| } else { |
| /* RAM case */ |
| ptr = phys_ram_base + (pd & TARGET_PAGE_MASK) + |
| (addr & ~TARGET_PAGE_MASK); |
| memcpy(buf, ptr, l); |
| } |
| } |
| len -= l; |
| buf += l; |
| addr += l; |
| } |
| } |
| #endif |
| |
| /* virtual memory access for debug */ |
| int cpu_memory_rw_debug(CPUState *env, target_ulong addr, |
| uint8_t *buf, int len, int is_write) |
| { |
| int l; |
| target_ulong page, phys_addr; |
| |
| while (len > 0) { |
| page = addr & TARGET_PAGE_MASK; |
| phys_addr = cpu_get_phys_page_debug(env, page); |
| /* if no physical page mapped, return an error */ |
| if (phys_addr == -1) |
| return -1; |
| l = (page + TARGET_PAGE_SIZE) - addr; |
| if (l > len) |
| l = len; |
| cpu_physical_memory_rw(phys_addr + (addr & ~TARGET_PAGE_MASK), |
| buf, l, is_write); |
| len -= l; |
| buf += l; |
| addr += l; |
| } |
| return 0; |
| } |
| |
| #if !defined(CONFIG_USER_ONLY) |
| |
| #define MMUSUFFIX _cmmu |
| #define GETPC() NULL |
| #define env cpu_single_env |
| |
| #define SHIFT 0 |
| #include "softmmu_template.h" |
| |
| #define SHIFT 1 |
| #include "softmmu_template.h" |
| |
| #define SHIFT 2 |
| #include "softmmu_template.h" |
| |
| #define SHIFT 3 |
| #include "softmmu_template.h" |
| |
| #undef env |
| |
| #endif |