/* * 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__ static inline 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;