| /* |
| * internal execution defines for qemu |
| * |
| * 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 |
| */ |
| |
| #define GEN_FLAG_CODE32_SHIFT 0 |
| #define GEN_FLAG_ADDSEG_SHIFT 1 |
| #define GEN_FLAG_SS32_SHIFT 2 |
| #define GEN_FLAG_VM_SHIFT 3 |
| #define GEN_FLAG_ST_SHIFT 4 |
| #define GEN_FLAG_TF_SHIFT 8 /* same position as eflags */ |
| #define GEN_FLAG_CPL_SHIFT 9 |
| #define GEN_FLAG_IOPL_SHIFT 12 /* same position as eflags */ |
| |
| struct TranslationBlock; |
| int cpu_x86_gen_code(struct TranslationBlock *tb, |
| int max_code_size, int *gen_code_size_ptr); |
| int cpu_x86_search_pc(struct TranslationBlock *tb, |
| uint32_t *found_pc, unsigned long searched_pc); |
| void cpu_x86_tblocks_init(void); |
| void page_init(void); |
| int page_unprotect(unsigned long address); |
| |
| #define CODE_GEN_MAX_SIZE 65536 |
| #define CODE_GEN_ALIGN 16 /* must be >= of the size of a icache line */ |
| |
| #define CODE_GEN_HASH_BITS 15 |
| #define CODE_GEN_HASH_SIZE (1 << CODE_GEN_HASH_BITS) |
| |
| /* maximum total translate dcode allocated */ |
| #define CODE_GEN_BUFFER_SIZE (2048 * 1024) |
| //#define CODE_GEN_BUFFER_SIZE (128 * 1024) |
| |
| #if defined(__powerpc__) |
| #define USE_DIRECT_JUMP |
| #endif |
| |
| typedef struct TranslationBlock { |
| unsigned long pc; /* simulated PC corresponding to this block (EIP + CS base) */ |
| unsigned long cs_base; /* CS base for this block */ |
| unsigned int flags; /* flags defining in which context the code was generated */ |
| uint16_t size; /* size of target code for this block (1 <= |
| size <= TARGET_PAGE_SIZE) */ |
| uint8_t *tc_ptr; /* pointer to the translated code */ |
| struct TranslationBlock *hash_next; /* next matching block */ |
| struct TranslationBlock *page_next[2]; /* next blocks in even/odd page */ |
| /* the following data are used to directly call another TB from |
| the code of this one. */ |
| uint16_t tb_next_offset[2]; /* offset of original jump target */ |
| #ifdef USE_DIRECT_JUMP |
| uint16_t tb_jmp_offset[2]; /* offset of jump instruction */ |
| #else |
| uint8_t *tb_next[2]; /* address of jump generated code */ |
| #endif |
| /* list of TBs jumping to this one. This is a circular list using |
| the two least significant bits of the pointers to tell what is |
| the next pointer: 0 = jmp_next[0], 1 = jmp_next[1], 2 = |
| jmp_first */ |
| struct TranslationBlock *jmp_next[2]; |
| struct TranslationBlock *jmp_first; |
| } TranslationBlock; |
| |
| static inline unsigned int tb_hash_func(unsigned long pc) |
| { |
| return pc & (CODE_GEN_HASH_SIZE - 1); |
| } |
| |
| TranslationBlock *tb_alloc(unsigned long pc); |
| void tb_flush(void); |
| void tb_link(TranslationBlock *tb); |
| |
| extern TranslationBlock *tb_hash[CODE_GEN_HASH_SIZE]; |
| |
| extern uint8_t code_gen_buffer[CODE_GEN_BUFFER_SIZE]; |
| extern uint8_t *code_gen_ptr; |
| |
| /* find a translation block in the translation cache. If not found, |
| return NULL and the pointer to the last element of the list in pptb */ |
| static inline TranslationBlock *tb_find(TranslationBlock ***pptb, |
| unsigned long pc, |
| unsigned long cs_base, |
| unsigned int flags) |
| { |
| TranslationBlock **ptb, *tb; |
| unsigned int h; |
| |
| h = tb_hash_func(pc); |
| ptb = &tb_hash[h]; |
| for(;;) { |
| tb = *ptb; |
| if (!tb) |
| break; |
| if (tb->pc == pc && tb->cs_base == cs_base && tb->flags == flags) |
| return tb; |
| ptb = &tb->hash_next; |
| } |
| *pptb = ptb; |
| return NULL; |
| } |
| |
| #if defined(__powerpc__) |
| |
| static inline void tb_set_jmp_target(TranslationBlock *tb, |
| int n, unsigned long addr) |
| { |
| uint32_t val, *ptr; |
| unsigned long offset; |
| |
| offset = (unsigned long)(tb->tc_ptr + tb->tb_jmp_offset[n]); |
| |
| /* patch the branch destination */ |
| ptr = (uint32_t *)offset; |
| val = *ptr; |
| val = (val & ~0x03fffffc) | ((addr - offset) & 0x03fffffc); |
| *ptr = val; |
| /* flush icache */ |
| asm volatile ("dcbst 0,%0" : : "r"(ptr) : "memory"); |
| asm volatile ("sync" : : : "memory"); |
| asm volatile ("icbi 0,%0" : : "r"(ptr) : "memory"); |
| asm volatile ("sync" : : : "memory"); |
| asm volatile ("isync" : : : "memory"); |
| } |
| |
| #else |
| |
| /* set the jump target */ |
| static inline void tb_set_jmp_target(TranslationBlock *tb, |
| int n, unsigned long addr) |
| { |
| tb->tb_next[n] = (void *)addr; |
| } |
| |
| #endif |
| |
| static inline void tb_add_jump(TranslationBlock *tb, int n, |
| TranslationBlock *tb_next) |
| { |
| /* NOTE: this test is only needed for thread safety */ |
| if (!tb->jmp_next[n]) { |
| /* patch the native jump address */ |
| tb_set_jmp_target(tb, n, (unsigned long)tb_next->tc_ptr); |
| |
| /* add in TB jmp circular list */ |
| tb->jmp_next[n] = tb_next->jmp_first; |
| tb_next->jmp_first = (TranslationBlock *)((long)(tb) | (n)); |
| } |
| } |
| |
| TranslationBlock *tb_find_pc(unsigned long pc_ptr); |
| |
| #ifndef offsetof |
| #define offsetof(type, field) ((size_t) &((type *)0)->field) |
| #endif |
| |
| #ifdef __powerpc__ |
| static inline int testandset (int *p) |
| { |
| int ret; |
| __asm__ __volatile__ ( |
| "0: lwarx %0,0,%1 ;" |
| " xor. %0,%3,%0;" |
| " bne 1f;" |
| " stwcx. %2,0,%1;" |
| " bne- 0b;" |
| "1: " |
| : "=&r" (ret) |
| : "r" (p), "r" (1), "r" (0) |
| : "cr0", "memory"); |
| return ret; |
| } |
| #endif |
| |
| #ifdef __i386__ |
| static inline int testandset (int *p) |
| { |
| char ret; |
| long int readval; |
| |
| __asm__ __volatile__ ("lock; cmpxchgl %3, %1; sete %0" |
| : "=q" (ret), "=m" (*p), "=a" (readval) |
| : "r" (1), "m" (*p), "a" (0) |
| : "memory"); |
| return ret; |
| } |
| #endif |
| |
| #ifdef __s390__ |
| static inline int testandset (int *p) |
| { |
| int ret; |
| |
| __asm__ __volatile__ ("0: cs %0,%1,0(%2)\n" |
| " jl 0b" |
| : "=&d" (ret) |
| : "r" (1), "a" (p), "0" (*p) |
| : "cc", "memory" ); |
| return ret; |
| } |
| #endif |
| |
| #ifdef __alpha__ |
| int testandset (int *p) |
| { |
| int ret; |
| unsigned long one; |
| |
| __asm__ __volatile__ ("0: mov 1,%2\n" |
| " ldl_l %0,%1\n" |
| " stl_c %2,%1\n" |
| " beq %2,1f\n" |
| ".subsection 2\n" |
| "1: br 0b\n" |
| ".previous" |
| : "=r" (ret), "=m" (*p), "=r" (one) |
| : "m" (*p)); |
| return ret; |
| } |
| #endif |
| |
| #ifdef __sparc__ |
| static inline int testandset (int *p) |
| { |
| int ret; |
| |
| __asm__ __volatile__("ldstub [%1], %0" |
| : "=r" (ret) |
| : "r" (p) |
| : "memory"); |
| |
| return (ret ? 1 : 0); |
| } |
| #endif |
| |
| typedef int spinlock_t; |
| |
| #define SPIN_LOCK_UNLOCKED 0 |
| |
| static inline void spin_lock(spinlock_t *lock) |
| { |
| while (testandset(lock)); |
| } |
| |
| static inline void spin_unlock(spinlock_t *lock) |
| { |
| *lock = 0; |
| } |
| |
| static inline int spin_trylock(spinlock_t *lock) |
| { |
| return !testandset(lock); |
| } |
| |
| extern spinlock_t tb_lock; |
| |
