Archipelago » qemu

/*

 * 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

 */

/* allow to see translation results - the slowdown should be negligible, so we leave it */

#define DEBUG_DISAS

/* is_jmp field values */

#define DISAS_NEXT    0 /* next instruction can be analyzed */

#define DISAS_JUMP    1 /* only pc was modified dynamically */

#define DISAS_UPDATE  2 /* cpu state was modified dynamically */

#define DISAS_TB_JUMP 3 /* only pc was modified statically */

struct TranslationBlock;

/* XXX: make safe guess about sizes */

#define MAX_OP_PER_INSTR 64

/* A Call op needs up to 6 + 2N parameters (N = number of arguments).  */

#define MAX_OPC_PARAM 10

#define OPC_BUF_SIZE 512

#define OPC_MAX_SIZE (OPC_BUF_SIZE - MAX_OP_PER_INSTR)

/* Maximum size a TCG op can expand to.  This is complicated because a

   single op may require several host instructions and regirster reloads.

   For now take a wild guess at 128 bytes, which should allow at least

   a couple of fixup instructions per argument.  */

#define TCG_MAX_OP_SIZE 128

#define OPPARAM_BUF_SIZE (OPC_BUF_SIZE * MAX_OPC_PARAM)

extern target_ulong gen_opc_pc[OPC_BUF_SIZE];

extern target_ulong gen_opc_npc[OPC_BUF_SIZE];

extern uint8_t gen_opc_cc_op[OPC_BUF_SIZE];

extern uint8_t gen_opc_instr_start[OPC_BUF_SIZE];

extern target_ulong gen_opc_jump_pc[2];

extern uint32_t gen_opc_hflags[OPC_BUF_SIZE];

typedef void (GenOpFunc)(void);

typedef void (GenOpFunc1)(long);

typedef void (GenOpFunc2)(long, long);

typedef void (GenOpFunc3)(long, long, long);

#if defined(TARGET_I386)

void optimize_flags_init(void);

#endif

extern FILE *logfile;

extern int loglevel;

int gen_intermediate_code(CPUState *env, struct TranslationBlock *tb);

int gen_intermediate_code_pc(CPUState *env, struct TranslationBlock *tb);

void gen_pc_load(CPUState *env, struct TranslationBlock *tb,

                 unsigned long searched_pc, int pc_pos, void *puc);

unsigned long code_gen_max_block_size(void);

void cpu_gen_init(void);

int cpu_gen_code(CPUState *env, struct TranslationBlock *tb,

                 int *gen_code_size_ptr);

int cpu_restore_state(struct TranslationBlock *tb,

                      CPUState *env, unsigned long searched_pc,

                      void *puc);

int cpu_restore_state_copy(struct TranslationBlock *tb,

                           CPUState *env, unsigned long searched_pc,

                           void *puc);

void cpu_resume_from_signal(CPUState *env1, void *puc);

void cpu_exec_init(CPUState *env);

int page_unprotect(target_ulong address, unsigned long pc, void *puc);

void tb_invalidate_phys_page_range(target_phys_addr_t start, target_phys_addr_t end,

                                   int is_cpu_write_access);

void tb_invalidate_page_range(target_ulong start, target_ulong end);

void tlb_flush_page(CPUState *env, target_ulong addr);

void tlb_flush(CPUState *env, int flush_global);

int tlb_set_page_exec(CPUState *env, target_ulong vaddr,

                      target_phys_addr_t paddr, int prot,

                      int mmu_idx, int is_softmmu);

static inline int tlb_set_page(CPUState *env1, target_ulong vaddr,

                               target_phys_addr_t paddr, int prot,

                               int mmu_idx, int is_softmmu)

{

    if (prot & PAGE_READ)

        prot |= PAGE_EXEC;

    return tlb_set_page_exec(env1, vaddr, paddr, prot, mmu_idx, is_softmmu);

}

#define CODE_GEN_ALIGN           16 /* must be >= of the size of a icache line */

#define CODE_GEN_PHYS_HASH_BITS     15

#define CODE_GEN_PHYS_HASH_SIZE     (1 << CODE_GEN_PHYS_HASH_BITS)

/* maximum total translate dcode allocated */

/* NOTE: the translated code area cannot be too big because on some

   archs the range of "fast" function calls is limited. Here is a

   summary of the ranges:

   i386  : signed 32 bits

   arm   : signed 26 bits

   ppc   : signed 24 bits

   sparc : signed 32 bits

   alpha : signed 23 bits

*/

#if defined(__alpha__)

#define CODE_GEN_BUFFER_SIZE     (2 * 1024 * 1024)

#elif defined(__ia64)

#define CODE_GEN_BUFFER_SIZE     (4 * 1024 * 1024)        /* range of addl */

#elif defined(__powerpc__)

#define CODE_GEN_BUFFER_SIZE     (6 * 1024 * 1024)

#else

/* XXX: make it dynamic on x86 */

#define CODE_GEN_BUFFER_SIZE     (16 * 1024 * 1024)

#endif

//#define CODE_GEN_BUFFER_SIZE     (128 * 1024)

/* estimated block size for TB allocation */

/* XXX: use a per code average code fragment size and modulate it

   according to the host CPU */

#if defined(CONFIG_SOFTMMU)

#define CODE_GEN_AVG_BLOCK_SIZE 128

#else

#define CODE_GEN_AVG_BLOCK_SIZE 64

#endif

#define CODE_GEN_MAX_BLOCKS    (CODE_GEN_BUFFER_SIZE / CODE_GEN_AVG_BLOCK_SIZE)

#if defined(__powerpc__) || defined(__x86_64__)

#define USE_DIRECT_JUMP

#endif

#if defined(__i386__) && !defined(_WIN32)

#define USE_DIRECT_JUMP

#endif

typedef struct TranslationBlock {

    target_ulong pc;   /* simulated PC corresponding to this block (EIP + CS base) */

    target_ulong cs_base; /* CS base for this block */

    uint64_t 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) */

    uint16_t cflags;    /* compile flags */

#define CF_TB_FP_USED  0x0002 /* fp ops are used in the TB */

#define CF_FP_USED     0x0004 /* fp ops are used in the TB or in a chained TB */

#define CF_SINGLE_INSN 0x0008 /* compile only a single instruction */

    uint8_t *tc_ptr;    /* pointer to the translated code */

    /* next matching tb for physical address. */

    struct TranslationBlock *phys_hash_next;

    /* first and second physical page containing code. The lower bit

       of the pointer tells the index in page_next[] */

    struct TranslationBlock *page_next[2];

    target_ulong page_addr[2];

    /* 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[4]; /* offset of jump instruction */

#else

    unsigned long 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_jmp_cache_hash_page(target_ulong pc)

{

    target_ulong tmp;

    tmp = pc ^ (pc >> (TARGET_PAGE_BITS - TB_JMP_PAGE_BITS));

    return (tmp >> (TARGET_PAGE_BITS - TB_JMP_PAGE_BITS)) & TB_JMP_PAGE_MASK;

}

static inline unsigned int tb_jmp_cache_hash_func(target_ulong pc)

{

    target_ulong tmp;

    tmp = pc ^ (pc >> (TARGET_PAGE_BITS - TB_JMP_PAGE_BITS));

    return (((tmp >> (TARGET_PAGE_BITS - TB_JMP_PAGE_BITS)) & TB_JMP_PAGE_MASK)

            | (tmp & TB_JMP_ADDR_MASK));

}

static inline unsigned int tb_phys_hash_func(unsigned long pc)

{

    return pc & (CODE_GEN_PHYS_HASH_SIZE - 1);

}

TranslationBlock *tb_alloc(target_ulong pc);

void tb_flush(CPUState *env);

void tb_link_phys(TranslationBlock *tb,

                  target_ulong phys_pc, target_ulong phys_page2);

extern TranslationBlock *tb_phys_hash[CODE_GEN_PHYS_HASH_SIZE];

extern uint8_t code_gen_buffer[CODE_GEN_BUFFER_SIZE];

extern uint8_t *code_gen_ptr;

#if defined(USE_DIRECT_JUMP)

#if defined(__powerpc__)

static inline void tb_set_jmp_target1(unsigned long jmp_addr, unsigned long addr)

{

    uint32_t val, *ptr;

    /* patch the branch destination */

    ptr = (uint32_t *)jmp_addr;

    val = *ptr;

    val = (val & ~0x03fffffc) | ((addr - jmp_addr) & 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");

}

#elif defined(__i386__) || defined(__x86_64__)

static inline void tb_set_jmp_target1(unsigned long jmp_addr, unsigned long addr)

{

    /* patch the branch destination */

    *(uint32_t *)jmp_addr = addr - (jmp_addr + 4);

    /* no need to flush icache explicitely */

}

#endif

static inline void tb_set_jmp_target(TranslationBlock *tb,

                                     int n, unsigned long addr)

{

    unsigned long offset;

    offset = tb->tb_jmp_offset[n];

    tb_set_jmp_target1((unsigned long)(tb->tc_ptr + offset), addr);

    offset = tb->tb_jmp_offset[n + 2];

    if (offset != 0xffff)

        tb_set_jmp_target1((unsigned long)(tb->tc_ptr + offset), addr);

}

#else

/* set the jump target */

static inline void tb_set_jmp_target(TranslationBlock *tb,

                                     int n, unsigned long addr)

{

    tb->tb_next[n] = 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

#if defined(_WIN32)

#define ASM_DATA_SECTION ".section \".data\"\n"

#define ASM_PREVIOUS_SECTION ".section .text\n"

#elif defined(__APPLE__)

#define ASM_DATA_SECTION ".data\n"

#define ASM_PREVIOUS_SECTION ".text\n"

#else

#define ASM_DATA_SECTION ".section \".data\"\n"

#define ASM_PREVIOUS_SECTION ".previous\n"

#endif

#define ASM_OP_LABEL_NAME(n, opname) \

    ASM_NAME(__op_label) #n "." ASM_NAME(opname)

extern CPUWriteMemoryFunc *io_mem_write[IO_MEM_NB_ENTRIES][4];

extern CPUReadMemoryFunc *io_mem_read[IO_MEM_NB_ENTRIES][4];

extern void *io_mem_opaque[IO_MEM_NB_ENTRIES];

#if defined(__hppa__)

typedef int spinlock_t[4];

#define SPIN_LOCK_UNLOCKED { 1, 1, 1, 1 }

static inline void resetlock (spinlock_t *p)

{

    (*p)[0] = (*p)[1] = (*p)[2] = (*p)[3] = 1;

}

#else

typedef int spinlock_t;

#define SPIN_LOCK_UNLOCKED 0

static inline void resetlock (spinlock_t *p)

{

    *p = SPIN_LOCK_UNLOCKED;

}

#endif

#if defined(__powerpc__)

static inline int testandset (int *p)

{

    int ret;

    __asm__ __volatile__ (

                          "0:    lwarx %0,0,%1\n"

                          "      xor. %0,%3,%0\n"

                          "      bne 1f\n"

                          "      stwcx. %2,0,%1\n"

                          "      bne- 0b\n"

                          "1:    "

                          : "=&r" (ret)

                          : "r" (p), "r" (1), "r" (0)

                          : "cr0", "memory");

    return ret;

}

#elif defined(__i386__)

static inline int testandset (int *p)

{

    long int readval = 0;

    __asm__ __volatile__ ("lock; cmpxchgl %2, %0"

                          : "+m" (*p), "+a" (readval)

                          : "r" (1)

                          : "cc");

    return readval;

}

#elif defined(__x86_64__)

static inline int testandset (int *p)

{

    long int readval = 0;

    __asm__ __volatile__ ("lock; cmpxchgl %2, %0"

                          : "+m" (*p), "+a" (readval)

                          : "r" (1)

                          : "cc");

    return readval;

}

#elif defined(__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;

}

#elif defined(__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;

}

#elif defined(__sparc__)

static inline int testandset (int *p)

{

        int ret;

        __asm__ __volatile__("ldstub        [%1], %0"

                             : "=r" (ret)

                             : "r" (p)

                             : "memory");

        return (ret ? 1 : 0);

}

#elif defined(__arm__)

static inline int testandset (int *spinlock)

{

    register unsigned int ret;

    __asm__ __volatile__("swp %0, %1, [%2]"

                         : "=r"(ret)

                         : "0"(1), "r"(spinlock));

    return ret;

}

#elif defined(__mc68000)

static inline int testandset (int *p)

{

    char ret;

    __asm__ __volatile__("tas %1; sne %0"

                         : "=r" (ret)

                         : "m" (p)

                         : "cc","memory");

    return ret;

}

#elif defined(__hppa__)

/* Because malloc only guarantees 8-byte alignment for malloc'd data,

   and GCC only guarantees 8-byte alignment for stack locals, we can't

   be assured of 16-byte alignment for atomic lock data even if we

   specify "__attribute ((aligned(16)))" in the type declaration.  So,

   we use a struct containing an array of four ints for the atomic lock

   type and dynamically select the 16-byte aligned int from the array

   for the semaphore.  */

#define __PA_LDCW_ALIGNMENT 16

static inline void *ldcw_align (void *p) {

    unsigned long a = (unsigned long)p;

    a = (a + __PA_LDCW_ALIGNMENT - 1) & ~(__PA_LDCW_ALIGNMENT - 1);

    return (void *)a;

}

static inline int testandset (spinlock_t *p)

{

    unsigned int ret;

    p = ldcw_align(p);

    __asm__ __volatile__("ldcw 0(%1),%0"

                         : "=r" (ret)

                         : "r" (p)

                         : "memory" );

    return !ret;

}

#elif defined(__ia64)

#include <ia64intrin.h>

static inline int testandset (int *p)

{

    return __sync_lock_test_and_set (p, 1);

}

#elif defined(__mips__)

static inline int testandset (int *p)

{

    int ret;

    __asm__ __volatile__ (

        "        .set push                \n"

        "        .set noat                \n"

        "        .set mips2                \n"

        "1:        li        $1, 1                \n"

        "        ll        %0, %1                \n"

        "        sc        $1, %1                \n"

        "        beqz        $1, 1b                \n"

        "        .set pop                "

        : "=r" (ret), "+R" (*p)

        :

        : "memory");

    return ret;

}

#else

#error unimplemented CPU support

#endif

#if defined(CONFIG_USER_ONLY)

static inline void spin_lock(spinlock_t *lock)

{

    while (testandset(lock));

}

static inline void spin_unlock(spinlock_t *lock)

{

    resetlock(lock);

}

static inline int spin_trylock(spinlock_t *lock)

{

    return !testandset(lock);

}

#else

static inline void spin_lock(spinlock_t *lock)

{

}

static inline void spin_unlock(spinlock_t *lock)

{

}

static inline int spin_trylock(spinlock_t *lock)

{

    return 1;

}

#endif

extern spinlock_t tb_lock;

extern int tb_invalidated_flag;

#if !defined(CONFIG_USER_ONLY)

void tlb_fill(target_ulong addr, int is_write, int mmu_idx,

              void *retaddr);

#define ACCESS_TYPE (NB_MMU_MODES + 1)

#define MEMSUFFIX _code

#define env cpu_single_env

#define DATA_SIZE 1

#include "softmmu_header.h"

#define DATA_SIZE 2

#include "softmmu_header.h"

#define DATA_SIZE 4

#include "softmmu_header.h"

#define DATA_SIZE 8

#include "softmmu_header.h"

#undef ACCESS_TYPE

#undef MEMSUFFIX

#undef env

#endif

#if defined(CONFIG_USER_ONLY)

static inline target_ulong get_phys_addr_code(CPUState *env1, target_ulong addr)

{

    return addr;

}

#else

/* NOTE: this function can trigger an exception */

/* NOTE2: the returned address is not exactly the physical address: it

   is the offset relative to phys_ram_base */

static inline target_ulong get_phys_addr_code(CPUState *env1, target_ulong addr)

{

    int mmu_idx, page_index, pd;

    page_index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);

    mmu_idx = cpu_mmu_index(env1);

    if (__builtin_expect(env1->tlb_table[mmu_idx][page_index].addr_code !=

                         (addr & TARGET_PAGE_MASK), 0)) {

        ldub_code(addr);

    }

    pd = env1->tlb_table[mmu_idx][page_index].addr_code & ~TARGET_PAGE_MASK;

    if (pd > IO_MEM_ROM && !(pd & IO_MEM_ROMD)) {

#if defined(TARGET_SPARC) || defined(TARGET_MIPS)

        do_unassigned_access(addr, 0, 1, 0);

#else

        cpu_abort(env1, "Trying to execute code outside RAM or ROM at 0x" TARGET_FMT_lx "\n", addr);

#endif

    }

    return addr + env1->tlb_table[mmu_idx][page_index].addend - (unsigned long)phys_ram_base;

}

#endif

#ifdef USE_KQEMU

#define KQEMU_MODIFY_PAGE_MASK (0xff & ~(VGA_DIRTY_FLAG | CODE_DIRTY_FLAG))

int kqemu_init(CPUState *env);

int kqemu_cpu_exec(CPUState *env);

void kqemu_flush_page(CPUState *env, target_ulong addr);

void kqemu_flush(CPUState *env, int global);

void kqemu_set_notdirty(CPUState *env, ram_addr_t ram_addr);

void kqemu_modify_page(CPUState *env, ram_addr_t ram_addr);

void kqemu_cpu_interrupt(CPUState *env);

void kqemu_record_dump(void);

static inline int kqemu_is_ok(CPUState *env)

{

    return(env->kqemu_enabled &&

           (env->cr[0] & CR0_PE_MASK) &&

           !(env->hflags & HF_INHIBIT_IRQ_MASK) &&

           (env->eflags & IF_MASK) &&

           !(env->eflags & VM_MASK) &&

           (env->kqemu_enabled == 2 ||

            ((env->hflags & HF_CPL_MASK) == 3 &&

             (env->eflags & IOPL_MASK) != IOPL_MASK)));

}

#endif