Archipelago » qemu

/*

 * defines common to all virtual CPUs

 *

 *  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, see <http://www.gnu.org/licenses/>.

 */

#ifndef CPU_ALL_H

#define CPU_ALL_H

#include "qemu-common.h"

#include "qemu-tls.h"

#include "cpu-common.h"

/* some important defines:

 *

 * WORDS_ALIGNED : if defined, the host cpu can only make word aligned

 * memory accesses.

 *

 * HOST_WORDS_BIGENDIAN : if defined, the host cpu is big endian and

 * otherwise little endian.

 *

 * (TARGET_WORDS_ALIGNED : same for target cpu (not supported yet))

 *

 * TARGET_WORDS_BIGENDIAN : same for target cpu

 */

#if defined(HOST_WORDS_BIGENDIAN) != defined(TARGET_WORDS_BIGENDIAN)

#define BSWAP_NEEDED

#endif

#ifdef BSWAP_NEEDED

static inline uint16_t tswap16(uint16_t s)

{

    return bswap16(s);

}

static inline uint32_t tswap32(uint32_t s)

{

    return bswap32(s);

}

static inline uint64_t tswap64(uint64_t s)

{

    return bswap64(s);

}

static inline void tswap16s(uint16_t *s)

{

    *s = bswap16(*s);

}

static inline void tswap32s(uint32_t *s)

{

    *s = bswap32(*s);

}

static inline void tswap64s(uint64_t *s)

{

    *s = bswap64(*s);

}

#else

static inline uint16_t tswap16(uint16_t s)

{

    return s;

}

static inline uint32_t tswap32(uint32_t s)

{

    return s;

}

static inline uint64_t tswap64(uint64_t s)

{

    return s;

}

static inline void tswap16s(uint16_t *s)

{

}

static inline void tswap32s(uint32_t *s)

{

}

static inline void tswap64s(uint64_t *s)

{

}

#endif

#if TARGET_LONG_SIZE == 4

#define tswapl(s) tswap32(s)

#define tswapls(s) tswap32s((uint32_t *)(s))

#define bswaptls(s) bswap32s(s)

#else

#define tswapl(s) tswap64(s)

#define tswapls(s) tswap64s((uint64_t *)(s))

#define bswaptls(s) bswap64s(s)

#endif

/* CPU memory access without any memory or io remapping */

/*

 * the generic syntax for the memory accesses is:

 *

 * load: ld{type}{sign}{size}{endian}_{access_type}(ptr)

 *

 * store: st{type}{size}{endian}_{access_type}(ptr, val)

 *

 * type is:

 * (empty): integer access

 *   f    : float access

 *

 * sign is:

 * (empty): for floats or 32 bit size

 *   u    : unsigned

 *   s    : signed

 *

 * size is:

 *   b: 8 bits

 *   w: 16 bits

 *   l: 32 bits

 *   q: 64 bits

 *

 * endian is:

 * (empty): target cpu endianness or 8 bit access

 *   r    : reversed target cpu endianness (not implemented yet)

 *   be   : big endian (not implemented yet)

 *   le   : little endian (not implemented yet)

 *

 * access_type is:

 *   raw    : host memory access

 *   user   : user mode access using soft MMU

 *   kernel : kernel mode access using soft MMU

 */

/* target-endianness CPU memory access functions */

#if defined(TARGET_WORDS_BIGENDIAN)

#define lduw_p(p) lduw_be_p(p)

#define ldsw_p(p) ldsw_be_p(p)

#define ldl_p(p) ldl_be_p(p)

#define ldq_p(p) ldq_be_p(p)

#define ldfl_p(p) ldfl_be_p(p)

#define ldfq_p(p) ldfq_be_p(p)

#define stw_p(p, v) stw_be_p(p, v)

#define stl_p(p, v) stl_be_p(p, v)

#define stq_p(p, v) stq_be_p(p, v)

#define stfl_p(p, v) stfl_be_p(p, v)

#define stfq_p(p, v) stfq_be_p(p, v)

#else

#define lduw_p(p) lduw_le_p(p)

#define ldsw_p(p) ldsw_le_p(p)

#define ldl_p(p) ldl_le_p(p)

#define ldq_p(p) ldq_le_p(p)

#define ldfl_p(p) ldfl_le_p(p)

#define ldfq_p(p) ldfq_le_p(p)

#define stw_p(p, v) stw_le_p(p, v)

#define stl_p(p, v) stl_le_p(p, v)

#define stq_p(p, v) stq_le_p(p, v)

#define stfl_p(p, v) stfl_le_p(p, v)

#define stfq_p(p, v) stfq_le_p(p, v)

#endif

/* MMU memory access macros */

#if defined(CONFIG_USER_ONLY)

#include <assert.h>

#include "qemu-types.h"

/* On some host systems the guest address space is reserved on the host.

 * This allows the guest address space to be offset to a convenient location.

 */

#if defined(CONFIG_USE_GUEST_BASE)

extern unsigned long guest_base;

extern int have_guest_base;

extern unsigned long reserved_va;

#define GUEST_BASE guest_base

#define RESERVED_VA reserved_va

#else

#define GUEST_BASE 0ul

#define RESERVED_VA 0ul

#endif

/* All direct uses of g2h and h2g need to go away for usermode softmmu.  */

#define g2h(x) ((void *)((unsigned long)(x) + GUEST_BASE))

#if HOST_LONG_BITS <= TARGET_VIRT_ADDR_SPACE_BITS

#define h2g_valid(x) 1

#else

#define h2g_valid(x) ({ \

    unsigned long __guest = (unsigned long)(x) - GUEST_BASE; \

    __guest < (1ul << TARGET_VIRT_ADDR_SPACE_BITS); \

})

#endif

#define h2g(x) ({ \

    unsigned long __ret = (unsigned long)(x) - GUEST_BASE; \

    /* Check if given address fits target address space */ \

    assert(h2g_valid(x)); \

    (abi_ulong)__ret; \

})

#define saddr(x) g2h(x)

#define laddr(x) g2h(x)

#else /* !CONFIG_USER_ONLY */

/* NOTE: we use double casts if pointers and target_ulong have

   different sizes */

#define saddr(x) (uint8_t *)(long)(x)

#define laddr(x) (uint8_t *)(long)(x)

#endif

#define ldub_raw(p) ldub_p(laddr((p)))

#define ldsb_raw(p) ldsb_p(laddr((p)))

#define lduw_raw(p) lduw_p(laddr((p)))

#define ldsw_raw(p) ldsw_p(laddr((p)))

#define ldl_raw(p) ldl_p(laddr((p)))

#define ldq_raw(p) ldq_p(laddr((p)))

#define ldfl_raw(p) ldfl_p(laddr((p)))

#define ldfq_raw(p) ldfq_p(laddr((p)))

#define stb_raw(p, v) stb_p(saddr((p)), v)

#define stw_raw(p, v) stw_p(saddr((p)), v)

#define stl_raw(p, v) stl_p(saddr((p)), v)

#define stq_raw(p, v) stq_p(saddr((p)), v)

#define stfl_raw(p, v) stfl_p(saddr((p)), v)

#define stfq_raw(p, v) stfq_p(saddr((p)), v)

#if defined(CONFIG_USER_ONLY)

/* if user mode, no other memory access functions */

#define ldub(p) ldub_raw(p)

#define ldsb(p) ldsb_raw(p)

#define lduw(p) lduw_raw(p)

#define ldsw(p) ldsw_raw(p)

#define ldl(p) ldl_raw(p)

#define ldq(p) ldq_raw(p)

#define ldfl(p) ldfl_raw(p)

#define ldfq(p) ldfq_raw(p)

#define stb(p, v) stb_raw(p, v)

#define stw(p, v) stw_raw(p, v)

#define stl(p, v) stl_raw(p, v)

#define stq(p, v) stq_raw(p, v)

#define stfl(p, v) stfl_raw(p, v)

#define stfq(p, v) stfq_raw(p, v)

#define ldub_code(p) ldub_raw(p)

#define ldsb_code(p) ldsb_raw(p)

#define lduw_code(p) lduw_raw(p)

#define ldsw_code(p) ldsw_raw(p)

#define ldl_code(p) ldl_raw(p)

#define ldq_code(p) ldq_raw(p)

#define ldub_kernel(p) ldub_raw(p)

#define ldsb_kernel(p) ldsb_raw(p)

#define lduw_kernel(p) lduw_raw(p)

#define ldsw_kernel(p) ldsw_raw(p)

#define ldl_kernel(p) ldl_raw(p)

#define ldq_kernel(p) ldq_raw(p)

#define ldfl_kernel(p) ldfl_raw(p)

#define ldfq_kernel(p) ldfq_raw(p)

#define stb_kernel(p, v) stb_raw(p, v)

#define stw_kernel(p, v) stw_raw(p, v)

#define stl_kernel(p, v) stl_raw(p, v)

#define stq_kernel(p, v) stq_raw(p, v)

#define stfl_kernel(p, v) stfl_raw(p, v)

#define stfq_kernel(p, vt) stfq_raw(p, v)

#endif /* defined(CONFIG_USER_ONLY) */

/* page related stuff */

#define TARGET_PAGE_SIZE (1 << TARGET_PAGE_BITS)

#define TARGET_PAGE_MASK ~(TARGET_PAGE_SIZE - 1)

#define TARGET_PAGE_ALIGN(addr) (((addr) + TARGET_PAGE_SIZE - 1) & TARGET_PAGE_MASK)

/* ??? These should be the larger of unsigned long and target_ulong.  */

extern unsigned long qemu_real_host_page_size;

extern unsigned long qemu_host_page_size;

extern unsigned long qemu_host_page_mask;

#define HOST_PAGE_ALIGN(addr) (((addr) + qemu_host_page_size - 1) & qemu_host_page_mask)

/* same as PROT_xxx */

#define PAGE_READ      0x0001

#define PAGE_WRITE     0x0002

#define PAGE_EXEC      0x0004

#define PAGE_BITS      (PAGE_READ | PAGE_WRITE | PAGE_EXEC)

#define PAGE_VALID     0x0008

/* original state of the write flag (used when tracking self-modifying

   code */

#define PAGE_WRITE_ORG 0x0010

#if defined(CONFIG_BSD) && defined(CONFIG_USER_ONLY)

/* FIXME: Code that sets/uses this is broken and needs to go away.  */

#define PAGE_RESERVED  0x0020

#endif

#if defined(CONFIG_USER_ONLY)

void page_dump(FILE *f);

typedef int (*walk_memory_regions_fn)(void *, abi_ulong,

                                      abi_ulong, unsigned long);

int walk_memory_regions(void *, walk_memory_regions_fn);

int page_get_flags(target_ulong address);

void page_set_flags(target_ulong start, target_ulong end, int flags);

int page_check_range(target_ulong start, target_ulong len, int flags);

#endif

CPUState *cpu_copy(CPUState *env);

CPUState *qemu_get_cpu(int cpu);

#define CPU_DUMP_CODE 0x00010000

void cpu_dump_state(CPUState *env, FILE *f, fprintf_function cpu_fprintf,

                    int flags);

void cpu_dump_statistics(CPUState *env, FILE *f, fprintf_function cpu_fprintf,

                         int flags);

void QEMU_NORETURN cpu_abort(CPUState *env, const char *fmt, ...)

    GCC_FMT_ATTR(2, 3);

extern CPUState *first_cpu;

DECLARE_TLS(CPUState *,cpu_single_env);

#define cpu_single_env tls_var(cpu_single_env)

/* Flags for use in ENV->INTERRUPT_PENDING.

   The numbers assigned here are non-sequential in order to preserve

   binary compatibility with the vmstate dump.  Bit 0 (0x0001) was

   previously used for CPU_INTERRUPT_EXIT, and is cleared when loading

   the vmstate dump.  */

/* External hardware interrupt pending.  This is typically used for

   interrupts from devices.  */

#define CPU_INTERRUPT_HARD        0x0002

/* Exit the current TB.  This is typically used when some system-level device

   makes some change to the memory mapping.  E.g. the a20 line change.  */

#define CPU_INTERRUPT_EXITTB      0x0004

/* Halt the CPU.  */

#define CPU_INTERRUPT_HALT        0x0020

/* Debug event pending.  */

#define CPU_INTERRUPT_DEBUG       0x0080

/* Several target-specific external hardware interrupts.  Each target/cpu.h

   should define proper names based on these defines.  */

#define CPU_INTERRUPT_TGT_EXT_0   0x0008

#define CPU_INTERRUPT_TGT_EXT_1   0x0010

#define CPU_INTERRUPT_TGT_EXT_2   0x0040

#define CPU_INTERRUPT_TGT_EXT_3   0x0200

#define CPU_INTERRUPT_TGT_EXT_4   0x1000

/* Several target-specific internal interrupts.  These differ from the

   preceding target-specific interrupts in that they are intended to

   originate from within the cpu itself, typically in response to some

   instruction being executed.  These, therefore, are not masked while

   single-stepping within the debugger.  */

#define CPU_INTERRUPT_TGT_INT_0   0x0100

#define CPU_INTERRUPT_TGT_INT_1   0x0400

#define CPU_INTERRUPT_TGT_INT_2   0x0800

/* First unused bit: 0x2000.  */

/* The set of all bits that should be masked when single-stepping.  */

#define CPU_INTERRUPT_SSTEP_MASK \

    (CPU_INTERRUPT_HARD          \

     | CPU_INTERRUPT_TGT_EXT_0   \

     | CPU_INTERRUPT_TGT_EXT_1   \

     | CPU_INTERRUPT_TGT_EXT_2   \

     | CPU_INTERRUPT_TGT_EXT_3   \

     | CPU_INTERRUPT_TGT_EXT_4)

#ifndef CONFIG_USER_ONLY

typedef void (*CPUInterruptHandler)(CPUState *, int);

extern CPUInterruptHandler cpu_interrupt_handler;

static inline void cpu_interrupt(CPUState *s, int mask)

{

    cpu_interrupt_handler(s, mask);

}

#else /* USER_ONLY */

void cpu_interrupt(CPUState *env, int mask);

#endif /* USER_ONLY */

void cpu_reset_interrupt(CPUState *env, int mask);

void cpu_exit(CPUState *s);

bool qemu_cpu_has_work(CPUState *env);

/* Breakpoint/watchpoint flags */

#define BP_MEM_READ           0x01

#define BP_MEM_WRITE          0x02

#define BP_MEM_ACCESS         (BP_MEM_READ | BP_MEM_WRITE)

#define BP_STOP_BEFORE_ACCESS 0x04

#define BP_WATCHPOINT_HIT     0x08

#define BP_GDB                0x10

#define BP_CPU                0x20

int cpu_breakpoint_insert(CPUState *env, target_ulong pc, int flags,

                          CPUBreakpoint **breakpoint);

int cpu_breakpoint_remove(CPUState *env, target_ulong pc, int flags);

void cpu_breakpoint_remove_by_ref(CPUState *env, CPUBreakpoint *breakpoint);

void cpu_breakpoint_remove_all(CPUState *env, int mask);

int cpu_watchpoint_insert(CPUState *env, target_ulong addr, target_ulong len,

                          int flags, CPUWatchpoint **watchpoint);

int cpu_watchpoint_remove(CPUState *env, target_ulong addr,

                          target_ulong len, int flags);

void cpu_watchpoint_remove_by_ref(CPUState *env, CPUWatchpoint *watchpoint);

void cpu_watchpoint_remove_all(CPUState *env, int mask);

#define SSTEP_ENABLE  0x1  /* Enable simulated HW single stepping */

#define SSTEP_NOIRQ   0x2  /* Do not use IRQ while single stepping */

#define SSTEP_NOTIMER 0x4  /* Do not Timers while single stepping */

void cpu_single_step(CPUState *env, int enabled);

void cpu_reset(CPUState *s);

int cpu_is_stopped(CPUState *env);

void run_on_cpu(CPUState *env, void (*func)(void *data), void *data);

#define CPU_LOG_TB_OUT_ASM (1 << 0)

#define CPU_LOG_TB_IN_ASM  (1 << 1)

#define CPU_LOG_TB_OP      (1 << 2)

#define CPU_LOG_TB_OP_OPT  (1 << 3)

#define CPU_LOG_INT        (1 << 4)

#define CPU_LOG_EXEC       (1 << 5)

#define CPU_LOG_PCALL      (1 << 6)

#define CPU_LOG_IOPORT     (1 << 7)

#define CPU_LOG_TB_CPU     (1 << 8)

#define CPU_LOG_RESET      (1 << 9)

/* define log items */

typedef struct CPULogItem {

    int mask;

    const char *name;

    const char *help;

} CPULogItem;

extern const CPULogItem cpu_log_items[];

void cpu_set_log(int log_flags);

void cpu_set_log_filename(const char *filename);

int cpu_str_to_log_mask(const char *str);

#if !defined(CONFIG_USER_ONLY)

/* Return the physical page corresponding to a virtual one. Use it

   only for debugging because no protection checks are done. Return -1

   if no page found. */

target_phys_addr_t cpu_get_phys_page_debug(CPUState *env, target_ulong addr);

/* memory API */

extern int phys_ram_fd;

extern ram_addr_t ram_size;

/* RAM is pre-allocated and passed into qemu_ram_alloc_from_ptr */

#define RAM_PREALLOC_MASK   (1 << 0)

typedef struct RAMBlock {

    struct MemoryRegion *mr;

    uint8_t *host;

    ram_addr_t offset;

    ram_addr_t length;

    uint32_t flags;

    char idstr[256];

    QLIST_ENTRY(RAMBlock) next;

#if defined(__linux__) && !defined(TARGET_S390X)

    int fd;

#endif

} RAMBlock;

typedef struct RAMList {

    uint8_t *phys_dirty;

    QLIST_HEAD(, RAMBlock) blocks;

} RAMList;

extern RAMList ram_list;

extern const char *mem_path;

extern int mem_prealloc;

/* physical memory access */

/* MMIO pages are identified by a combination of an IO device index and

   3 flags.  The ROMD code stores the page ram offset in iotlb entry, 

   so only a limited number of ids are avaiable.  */

#define IO_MEM_NB_ENTRIES  (1 << (TARGET_PAGE_BITS  - IO_MEM_SHIFT))

/* Flags stored in the low bits of the TLB virtual address.  These are

   defined so that fast path ram access is all zeros.  */

/* Zero if TLB entry is valid.  */

#define TLB_INVALID_MASK   (1 << 3)

/* Set if TLB entry references a clean RAM page.  The iotlb entry will

   contain the page physical address.  */

#define TLB_NOTDIRTY    (1 << 4)

/* Set if TLB entry is an IO callback.  */

#define TLB_MMIO        (1 << 5)

#define VGA_DIRTY_FLAG       0x01

#define CODE_DIRTY_FLAG      0x02

#define MIGRATION_DIRTY_FLAG 0x08

/* read dirty bit (return 0 or 1) */

static inline int cpu_physical_memory_is_dirty(ram_addr_t addr)

{

    return ram_list.phys_dirty[addr >> TARGET_PAGE_BITS] == 0xff;

}

static inline int cpu_physical_memory_get_dirty_flags(ram_addr_t addr)

{

    return ram_list.phys_dirty[addr >> TARGET_PAGE_BITS];

}

static inline int cpu_physical_memory_get_dirty(ram_addr_t addr,

                                                int dirty_flags)

{

    return ram_list.phys_dirty[addr >> TARGET_PAGE_BITS] & dirty_flags;

}

static inline void cpu_physical_memory_set_dirty(ram_addr_t addr)

{

    ram_list.phys_dirty[addr >> TARGET_PAGE_BITS] = 0xff;

}

static inline int cpu_physical_memory_set_dirty_flags(ram_addr_t addr,

                                                      int dirty_flags)

{

    return ram_list.phys_dirty[addr >> TARGET_PAGE_BITS] |= dirty_flags;

}

static inline void cpu_physical_memory_mask_dirty_range(ram_addr_t start,

                                                        int length,

                                                        int dirty_flags)

{

    int i, mask, len;

    uint8_t *p;

    len = length >> TARGET_PAGE_BITS;

    mask = ~dirty_flags;

    p = ram_list.phys_dirty + (start >> TARGET_PAGE_BITS);

    for (i = 0; i < len; i++) {

        p[i] &= mask;

    }

}

void cpu_physical_memory_reset_dirty(ram_addr_t start, ram_addr_t end,

                                     int dirty_flags);

void cpu_tlb_update_dirty(CPUState *env);

int cpu_physical_memory_set_dirty_tracking(int enable);

int cpu_physical_memory_get_dirty_tracking(void);

void dump_exec_info(FILE *f, fprintf_function cpu_fprintf);

#endif /* !CONFIG_USER_ONLY */

int cpu_memory_rw_debug(CPUState *env, target_ulong addr,

                        uint8_t *buf, int len, int is_write);

#endif /* CPU_ALL_H */