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/*
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* internal execution defines for qemu
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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, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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/* allow to see translation results - the slowdown should be negligible, so we leave it */
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#define DEBUG_DISAS
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#ifndef glue
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#define xglue(x, y) x ## y |
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#define glue(x, y) xglue(x, y)
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#define stringify(s) tostring(s)
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#define tostring(s) #s |
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#endif
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#if GCC_MAJOR < 3 |
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#define __builtin_expect(x, n) (x)
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#endif
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#ifdef __i386__
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#define REGPARM(n) __attribute((regparm(n)))
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#else
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#define REGPARM(n)
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#endif
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/* is_jmp field values */
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#define DISAS_NEXT 0 /* next instruction can be analyzed */ |
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#define DISAS_JUMP 1 /* only pc was modified dynamically */ |
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#define DISAS_UPDATE 2 /* cpu state was modified dynamically */ |
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#define DISAS_TB_JUMP 3 /* only pc was modified statically */ |
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struct TranslationBlock;
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/* XXX: make safe guess about sizes */
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#define MAX_OP_PER_INSTR 32 |
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#define OPC_BUF_SIZE 512 |
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#define OPC_MAX_SIZE (OPC_BUF_SIZE - MAX_OP_PER_INSTR)
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#define OPPARAM_BUF_SIZE (OPC_BUF_SIZE * 3) |
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extern uint16_t gen_opc_buf[OPC_BUF_SIZE];
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extern uint32_t gen_opparam_buf[OPPARAM_BUF_SIZE];
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extern uint32_t gen_opc_pc[OPC_BUF_SIZE];
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extern uint8_t gen_opc_cc_op[OPC_BUF_SIZE];
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extern uint8_t gen_opc_instr_start[OPC_BUF_SIZE];
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typedef void (GenOpFunc)(void); |
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typedef void (GenOpFunc1)(long); |
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typedef void (GenOpFunc2)(long, long); |
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typedef void (GenOpFunc3)(long, long, long); |
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#if defined(TARGET_I386)
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void optimize_flags_init(void); |
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#endif
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extern FILE *logfile;
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extern int loglevel; |
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int gen_intermediate_code(CPUState *env, struct TranslationBlock *tb); |
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int gen_intermediate_code_pc(CPUState *env, struct TranslationBlock *tb); |
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void dump_ops(const uint16_t *opc_buf, const uint32_t *opparam_buf); |
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int cpu_gen_code(CPUState *env, struct TranslationBlock *tb, |
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int max_code_size, int *gen_code_size_ptr); |
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int cpu_restore_state(struct TranslationBlock *tb, |
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CPUState *env, unsigned long searched_pc, |
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void *puc);
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int cpu_gen_code_copy(CPUState *env, struct TranslationBlock *tb, |
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int max_code_size, int *gen_code_size_ptr); |
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int cpu_restore_state_copy(struct TranslationBlock *tb, |
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CPUState *env, unsigned long searched_pc, |
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void *puc);
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void cpu_exec_init(void); |
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int page_unprotect(unsigned long address); |
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void tb_invalidate_page_range(target_ulong start, target_ulong end);
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void tlb_flush_page(CPUState *env, uint32_t addr);
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void tlb_flush_page_write(CPUState *env, uint32_t addr);
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void tlb_flush(CPUState *env, int flush_global); |
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int tlb_set_page(CPUState *env, uint32_t vaddr, uint32_t paddr, int prot, |
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int is_user, int is_softmmu); |
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#define CODE_GEN_MAX_SIZE 65536 |
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#define CODE_GEN_ALIGN 16 /* must be >= of the size of a icache line */ |
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#define CODE_GEN_HASH_BITS 15 |
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#define CODE_GEN_HASH_SIZE (1 << CODE_GEN_HASH_BITS) |
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#define CODE_GEN_PHYS_HASH_BITS 15 |
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#define CODE_GEN_PHYS_HASH_SIZE (1 << CODE_GEN_PHYS_HASH_BITS) |
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/* maximum total translate dcode allocated */
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/* NOTE: the translated code area cannot be too big because on some
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archs the range of "fast" function calls is limited. Here is a
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summary of the ranges:
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i386 : signed 32 bits
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arm : signed 26 bits
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ppc : signed 24 bits
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sparc : signed 32 bits
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alpha : signed 23 bits
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*/
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#if defined(__alpha__)
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#define CODE_GEN_BUFFER_SIZE (2 * 1024 * 1024) |
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#elif defined(__powerpc__)
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#define CODE_GEN_BUFFER_SIZE (6 * 1024 * 1024) |
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#else
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#define CODE_GEN_BUFFER_SIZE (8 * 1024 * 1024) |
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#endif
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//#define CODE_GEN_BUFFER_SIZE (128 * 1024)
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/* estimated block size for TB allocation */
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/* XXX: use a per code average code fragment size and modulate it
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according to the host CPU */
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#if defined(CONFIG_SOFTMMU)
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#define CODE_GEN_AVG_BLOCK_SIZE 128 |
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#else
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#define CODE_GEN_AVG_BLOCK_SIZE 64 |
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#endif
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#define CODE_GEN_MAX_BLOCKS (CODE_GEN_BUFFER_SIZE / CODE_GEN_AVG_BLOCK_SIZE)
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#if defined(__powerpc__)
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#define USE_DIRECT_JUMP
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#endif
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#if defined(__i386__) && !defined(_WIN32)
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#define USE_DIRECT_JUMP
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#endif
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typedef struct TranslationBlock { |
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unsigned long pc; /* simulated PC corresponding to this block (EIP + CS base) */ |
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unsigned long cs_base; /* CS base for this block */ |
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unsigned int flags; /* flags defining in which context the code was generated */ |
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uint16_t size; /* size of target code for this block (1 <=
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size <= TARGET_PAGE_SIZE) */
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uint16_t cflags; /* compile flags */
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#define CF_CODE_COPY 0x0001 /* block was generated in code copy mode */ |
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#define CF_TB_FP_USED 0x0002 /* fp ops are used in the TB */ |
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#define CF_FP_USED 0x0004 /* fp ops are used in the TB or in a chained TB */ |
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uint8_t *tc_ptr; /* pointer to the translated code */
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struct TranslationBlock *hash_next; /* next matching tb for virtual address */ |
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/* next matching tb for physical address. */
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struct TranslationBlock *phys_hash_next;
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/* first and second physical page containing code. The lower bit
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of the pointer tells the index in page_next[] */
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struct TranslationBlock *page_next[2]; |
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target_ulong page_addr[2];
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/* the following data are used to directly call another TB from
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the code of this one. */
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uint16_t tb_next_offset[2]; /* offset of original jump target */ |
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#ifdef USE_DIRECT_JUMP
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uint16_t tb_jmp_offset[4]; /* offset of jump instruction */ |
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#else
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uint32_t tb_next[2]; /* address of jump generated code */ |
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#endif
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/* list of TBs jumping to this one. This is a circular list using
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the two least significant bits of the pointers to tell what is
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the next pointer: 0 = jmp_next[0], 1 = jmp_next[1], 2 =
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jmp_first */
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struct TranslationBlock *jmp_next[2]; |
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struct TranslationBlock *jmp_first;
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} TranslationBlock; |
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static inline unsigned int tb_hash_func(unsigned long pc) |
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{ |
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return pc & (CODE_GEN_HASH_SIZE - 1); |
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} |
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static inline unsigned int tb_phys_hash_func(unsigned long pc) |
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{ |
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return pc & (CODE_GEN_PHYS_HASH_SIZE - 1); |
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} |
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TranslationBlock *tb_alloc(unsigned long pc); |
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void tb_flush(CPUState *env);
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void tb_link(TranslationBlock *tb);
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void tb_link_phys(TranslationBlock *tb,
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target_ulong phys_pc, target_ulong phys_page2); |
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extern TranslationBlock *tb_hash[CODE_GEN_HASH_SIZE];
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extern TranslationBlock *tb_phys_hash[CODE_GEN_PHYS_HASH_SIZE];
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extern uint8_t code_gen_buffer[CODE_GEN_BUFFER_SIZE];
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extern uint8_t *code_gen_ptr;
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/* find a translation block in the translation cache. If not found,
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return NULL and the pointer to the last element of the list in pptb */
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static inline TranslationBlock *tb_find(TranslationBlock ***pptb, |
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unsigned long pc, |
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unsigned long cs_base, |
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unsigned int flags) |
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{ |
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TranslationBlock **ptb, *tb; |
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unsigned int h; |
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h = tb_hash_func(pc); |
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ptb = &tb_hash[h]; |
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for(;;) {
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tb = *ptb; |
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if (!tb)
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break;
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if (tb->pc == pc && tb->cs_base == cs_base && tb->flags == flags)
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return tb;
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ptb = &tb->hash_next; |
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} |
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*pptb = ptb; |
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return NULL; |
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} |
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#if defined(USE_DIRECT_JUMP)
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#if defined(__powerpc__)
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static inline void tb_set_jmp_target1(unsigned long jmp_addr, unsigned long addr) |
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{ |
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uint32_t val, *ptr; |
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/* patch the branch destination */
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ptr = (uint32_t *)jmp_addr; |
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val = *ptr; |
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val = (val & ~0x03fffffc) | ((addr - jmp_addr) & 0x03fffffc); |
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*ptr = val; |
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/* flush icache */
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asm volatile ("dcbst 0,%0" : : "r"(ptr) : "memory"); |
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asm volatile ("sync" : : : "memory"); |
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asm volatile ("icbi 0,%0" : : "r"(ptr) : "memory"); |
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asm volatile ("sync" : : : "memory"); |
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asm volatile ("isync" : : : "memory"); |
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} |
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#elif defined(__i386__)
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static inline void tb_set_jmp_target1(unsigned long jmp_addr, unsigned long addr) |
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{ |
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/* patch the branch destination */
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*(uint32_t *)jmp_addr = addr - (jmp_addr + 4);
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/* no need to flush icache explicitely */
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} |
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#endif
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static inline void tb_set_jmp_target(TranslationBlock *tb, |
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int n, unsigned long addr) |
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{ |
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unsigned long offset; |
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offset = tb->tb_jmp_offset[n]; |
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tb_set_jmp_target1((unsigned long)(tb->tc_ptr + offset), addr); |
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offset = tb->tb_jmp_offset[n + 2];
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if (offset != 0xffff) |
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tb_set_jmp_target1((unsigned long)(tb->tc_ptr + offset), addr); |
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} |
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#else
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/* set the jump target */
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static inline void tb_set_jmp_target(TranslationBlock *tb, |
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int n, unsigned long addr) |
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{ |
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tb->tb_next[n] = addr; |
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} |
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#endif
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static inline void tb_add_jump(TranslationBlock *tb, int n, |
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TranslationBlock *tb_next) |
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{ |
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/* NOTE: this test is only needed for thread safety */
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if (!tb->jmp_next[n]) {
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/* patch the native jump address */
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tb_set_jmp_target(tb, n, (unsigned long)tb_next->tc_ptr); |
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/* add in TB jmp circular list */
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tb->jmp_next[n] = tb_next->jmp_first; |
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tb_next->jmp_first = (TranslationBlock *)((long)(tb) | (n));
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} |
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} |
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TranslationBlock *tb_find_pc(unsigned long pc_ptr); |
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#ifndef offsetof
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#define offsetof(type, field) ((size_t) &((type *)0)->field) |
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#endif
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#if defined(__powerpc__)
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/* we patch the jump instruction directly */
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#define JUMP_TB(opname, tbparam, n, eip)\
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do {\
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asm volatile (".section \".data\"\n"\ |
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"__op_label" #n "." stringify(opname) ":\n"\ |
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".long 1f\n"\
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".previous\n"\
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"b __op_jmp" #n "\n"\ |
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"1:\n");\
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T0 = (long)(tbparam) + (n);\
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EIP = eip;\ |
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EXIT_TB();\ |
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} while (0) |
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#define JUMP_TB2(opname, tbparam, n)\
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do {\
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asm volatile ("b __op_jmp" #n "\n");\ |
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} while (0) |
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#elif defined(__i386__) && defined(USE_DIRECT_JUMP)
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#ifdef _WIN32
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#define ASM_PREVIOUS_SECTION ".section .text\n" |
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#else
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#define ASM_PREVIOUS_SECTION ".previous\n" |
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#endif
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/* we patch the jump instruction directly */
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#define JUMP_TB(opname, tbparam, n, eip)\
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do {\
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asm volatile (".section .data\n"\ |
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"__op_label" #n "." stringify(opname) ":\n"\ |
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".long 1f\n"\
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ASM_PREVIOUS_SECTION \ |
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"jmp __op_jmp" #n "\n"\ |
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"1:\n");\
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T0 = (long)(tbparam) + (n);\
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EIP = eip;\ |
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EXIT_TB();\ |
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} while (0) |
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#define JUMP_TB2(opname, tbparam, n)\
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do {\
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asm volatile ("jmp __op_jmp" #n "\n");\ |
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} while (0) |
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#else
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/* jump to next block operations (more portable code, does not need
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cache flushing, but slower because of indirect jump) */
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#define JUMP_TB(opname, tbparam, n, eip)\
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do {\
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static void __attribute__((unused)) *__op_label ## n = &&label ## n;\ |
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static void __attribute__((unused)) *dummy ## n = &&dummy_label ## n;\ |
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goto *(void *)(((TranslationBlock *)tbparam)->tb_next[n]);\ |
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label ## n:\ |
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T0 = (long)(tbparam) + (n);\
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EIP = eip;\ |
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dummy_label ## n:\ |
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EXIT_TB();\ |
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} while (0) |
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/* second jump to same destination 'n' */
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#define JUMP_TB2(opname, tbparam, n)\
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do {\
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goto *(void *)(((TranslationBlock *)tbparam)->tb_next[n - 2]);\ |
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} while (0) |
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#endif
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extern CPUWriteMemoryFunc *io_mem_write[IO_MEM_NB_ENTRIES][4]; |
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extern CPUReadMemoryFunc *io_mem_read[IO_MEM_NB_ENTRIES][4]; |
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#ifdef __powerpc__
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static inline int testandset (int *p) |
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{ |
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int ret;
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__asm__ __volatile__ ( |
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"0: lwarx %0,0,%1 ;"
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" xor. %0,%3,%0;"
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" bne 1f;"
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" stwcx. %2,0,%1;"
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" bne- 0b;"
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"1: "
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: "=&r" (ret)
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: "r" (p), "r" (1), "r" (0) |
390 |
: "cr0", "memory"); |
391 |
return ret;
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} |
393 |
#endif
|
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395 |
#ifdef __i386__
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static inline int testandset (int *p) |
397 |
{ |
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char ret;
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long int readval; |
400 |
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__asm__ __volatile__ ("lock; cmpxchgl %3, %1; sete %0"
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: "=q" (ret), "=m" (*p), "=a" (readval) |
403 |
: "r" (1), "m" (*p), "a" (0) |
404 |
: "memory");
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return ret;
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} |
407 |
#endif
|
408 |
|
409 |
#ifdef __x86_64__
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static inline int testandset (int *p) |
411 |
{ |
412 |
char ret;
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int readval;
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414 |
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__asm__ __volatile__ ("lock; cmpxchgl %3, %1; sete %0"
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: "=q" (ret), "=m" (*p), "=a" (readval) |
417 |
: "r" (1), "m" (*p), "a" (0) |
418 |
: "memory");
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return ret;
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} |
421 |
#endif
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422 |
|
423 |
#ifdef __s390__
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static inline int testandset (int *p) |
425 |
{ |
426 |
int ret;
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427 |
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428 |
__asm__ __volatile__ ("0: cs %0,%1,0(%2)\n"
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" jl 0b"
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: "=&d" (ret)
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: "r" (1), "a" (p), "0" (*p) |
432 |
: "cc", "memory" ); |
433 |
return ret;
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434 |
} |
435 |
#endif
|
436 |
|
437 |
#ifdef __alpha__
|
438 |
static inline int testandset (int *p) |
439 |
{ |
440 |
int ret;
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unsigned long one; |
442 |
|
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__asm__ __volatile__ ("0: mov 1,%2\n"
|
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" ldl_l %0,%1\n"
|
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" stl_c %2,%1\n"
|
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" beq %2,1f\n"
|
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".subsection 2\n"
|
448 |
"1: br 0b\n"
|
449 |
".previous"
|
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: "=r" (ret), "=m" (*p), "=r" (one) |
451 |
: "m" (*p));
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return ret;
|
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} |
454 |
#endif
|
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|
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#ifdef __sparc__
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static inline int testandset (int *p) |
458 |
{ |
459 |
int ret;
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|
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__asm__ __volatile__("ldstub [%1], %0"
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: "=r" (ret)
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: "r" (p)
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: "memory");
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|
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return (ret ? 1 : 0); |
467 |
} |
468 |
#endif
|
469 |
|
470 |
#ifdef __arm__
|
471 |
static inline int testandset (int *spinlock) |
472 |
{ |
473 |
register unsigned int ret; |
474 |
__asm__ __volatile__("swp %0, %1, [%2]"
|
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: "=r"(ret)
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: "0"(1), "r"(spinlock)); |
477 |
|
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return ret;
|
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} |
480 |
#endif
|
481 |
|
482 |
#ifdef __mc68000
|
483 |
static inline int testandset (int *p) |
484 |
{ |
485 |
char ret;
|
486 |
__asm__ __volatile__("tas %1; sne %0"
|
487 |
: "=r" (ret)
|
488 |
: "m" (p)
|
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: "cc","memory"); |
490 |
return ret == 0; |
491 |
} |
492 |
#endif
|
493 |
|
494 |
typedef int spinlock_t; |
495 |
|
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#define SPIN_LOCK_UNLOCKED 0 |
497 |
|
498 |
#if defined(CONFIG_USER_ONLY)
|
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static inline void spin_lock(spinlock_t *lock) |
500 |
{ |
501 |
while (testandset(lock));
|
502 |
} |
503 |
|
504 |
static inline void spin_unlock(spinlock_t *lock) |
505 |
{ |
506 |
*lock = 0;
|
507 |
} |
508 |
|
509 |
static inline int spin_trylock(spinlock_t *lock) |
510 |
{ |
511 |
return !testandset(lock);
|
512 |
} |
513 |
#else
|
514 |
static inline void spin_lock(spinlock_t *lock) |
515 |
{ |
516 |
} |
517 |
|
518 |
static inline void spin_unlock(spinlock_t *lock) |
519 |
{ |
520 |
} |
521 |
|
522 |
static inline int spin_trylock(spinlock_t *lock) |
523 |
{ |
524 |
return 1; |
525 |
} |
526 |
#endif
|
527 |
|
528 |
extern spinlock_t tb_lock;
|
529 |
|
530 |
extern int tb_invalidated_flag; |
531 |
|
532 |
#if (defined(TARGET_I386) || defined(TARGET_PPC)) && \
|
533 |
!defined(CONFIG_USER_ONLY) |
534 |
|
535 |
void tlb_fill(unsigned long addr, int is_write, int is_user, |
536 |
void *retaddr);
|
537 |
|
538 |
#define ACCESS_TYPE 3 |
539 |
#define MEMSUFFIX _code
|
540 |
#define env cpu_single_env
|
541 |
|
542 |
#define DATA_SIZE 1 |
543 |
#include "softmmu_header.h" |
544 |
|
545 |
#define DATA_SIZE 2 |
546 |
#include "softmmu_header.h" |
547 |
|
548 |
#define DATA_SIZE 4 |
549 |
#include "softmmu_header.h" |
550 |
|
551 |
#undef ACCESS_TYPE
|
552 |
#undef MEMSUFFIX
|
553 |
#undef env
|
554 |
|
555 |
#endif
|
556 |
|
557 |
#if defined(CONFIG_USER_ONLY)
|
558 |
static inline target_ulong get_phys_addr_code(CPUState *env, target_ulong addr) |
559 |
{ |
560 |
return addr;
|
561 |
} |
562 |
#else
|
563 |
/* NOTE: this function can trigger an exception */
|
564 |
/* NOTE2: the returned address is not exactly the physical address: it
|
565 |
is the offset relative to phys_ram_base */
|
566 |
/* XXX: i386 target specific */
|
567 |
static inline target_ulong get_phys_addr_code(CPUState *env, target_ulong addr) |
568 |
{ |
569 |
int is_user, index;
|
570 |
|
571 |
index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
|
572 |
#if defined(TARGET_I386)
|
573 |
is_user = ((env->hflags & HF_CPL_MASK) == 3);
|
574 |
#elif defined (TARGET_PPC)
|
575 |
is_user = msr_pr; |
576 |
#else
|
577 |
#error "Unimplemented !" |
578 |
#endif
|
579 |
if (__builtin_expect(env->tlb_read[is_user][index].address !=
|
580 |
(addr & TARGET_PAGE_MASK), 0)) {
|
581 |
#if defined (TARGET_PPC)
|
582 |
env->access_type = ACCESS_CODE; |
583 |
ldub_code((void *)addr);
|
584 |
env->access_type = ACCESS_INT; |
585 |
#else
|
586 |
ldub_code((void *)addr);
|
587 |
#endif
|
588 |
} |
589 |
return addr + env->tlb_read[is_user][index].addend - (unsigned long)phys_ram_base; |
590 |
} |
591 |
#endif
|