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/*
* common defines for all 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_DEFS_H
#define CPU_DEFS_H
#ifndef NEED_CPU_H
#error cpu.h included from common code
#endif
#include "config.h"
#include <setjmp.h>
#include <inttypes.h>
#include <signal.h>
#include "qemu/osdep.h"
#include "qemu/queue.h"
#include "exec/hwaddr.h"
#ifndef TARGET_LONG_BITS
#error TARGET_LONG_BITS must be defined before including this header
#endif
#define TARGET_LONG_SIZE (TARGET_LONG_BITS / 8)
typedef int16_t target_short __attribute__ ((aligned(TARGET_SHORT_ALIGNMENT)));
typedef uint16_t target_ushort __attribute__((aligned(TARGET_SHORT_ALIGNMENT)));
typedef int32_t target_int __attribute__((aligned(TARGET_INT_ALIGNMENT)));
typedef uint32_t target_uint __attribute__((aligned(TARGET_INT_ALIGNMENT)));
typedef int64_t target_llong __attribute__((aligned(TARGET_LLONG_ALIGNMENT)));
typedef uint64_t target_ullong __attribute__((aligned(TARGET_LLONG_ALIGNMENT)));
/* target_ulong is the type of a virtual address */
#if TARGET_LONG_SIZE == 4
typedef int32_t target_long __attribute__((aligned(TARGET_LONG_ALIGNMENT)));
typedef uint32_t target_ulong __attribute__((aligned(TARGET_LONG_ALIGNMENT)));
#define TARGET_FMT_lx "%08x"
#define TARGET_FMT_ld "%d"
#define TARGET_FMT_lu "%u"
#elif TARGET_LONG_SIZE == 8
typedef int64_t target_long __attribute__((aligned(TARGET_LONG_ALIGNMENT)));
typedef uint64_t target_ulong __attribute__((aligned(TARGET_LONG_ALIGNMENT)));
#define TARGET_FMT_lx "%016" PRIx64
#define TARGET_FMT_ld "%" PRId64
#define TARGET_FMT_lu "%" PRIu64
#else
#error TARGET_LONG_SIZE undefined
#endif
#define EXCP_INTERRUPT 0x10000 /* async interruption */
#define EXCP_HLT 0x10001 /* hlt instruction reached */
#define EXCP_DEBUG 0x10002 /* cpu stopped after a breakpoint or singlestep */
#define EXCP_HALTED 0x10003 /* cpu is halted (waiting for external event) */
#define TB_JMP_CACHE_BITS 12
#define TB_JMP_CACHE_SIZE (1 << TB_JMP_CACHE_BITS)
/* Only the bottom TB_JMP_PAGE_BITS of the jump cache hash bits vary for
addresses on the same page. The top bits are the same. This allows
TLB invalidation to quickly clear a subset of the hash table. */
#define TB_JMP_PAGE_BITS (TB_JMP_CACHE_BITS / 2)
#define TB_JMP_PAGE_SIZE (1 << TB_JMP_PAGE_BITS)
#define TB_JMP_ADDR_MASK (TB_JMP_PAGE_SIZE - 1)
#define TB_JMP_PAGE_MASK (TB_JMP_CACHE_SIZE - TB_JMP_PAGE_SIZE)
#if !defined(CONFIG_USER_ONLY)
#define CPU_TLB_BITS 8
#define CPU_TLB_SIZE (1 << CPU_TLB_BITS)
#if HOST_LONG_BITS == 32 && TARGET_LONG_BITS == 32
#define CPU_TLB_ENTRY_BITS 4
#else
#define CPU_TLB_ENTRY_BITS 5
#endif
typedef struct CPUTLBEntry {
/* bit TARGET_LONG_BITS to TARGET_PAGE_BITS : virtual address
bit TARGET_PAGE_BITS-1..4 : Nonzero for accesses that should not
go directly to ram.
bit 3 : indicates that the entry is invalid
bit 2..0 : zero
*/
target_ulong addr_read;
target_ulong addr_write;
target_ulong addr_code;
/* Addend to virtual address to get host address. IO accesses
use the corresponding iotlb value. */
uintptr_t addend;
/* padding to get a power of two size */
uint8_t dummy[(1 << CPU_TLB_ENTRY_BITS) -
(sizeof(target_ulong) * 3 +
((-sizeof(target_ulong) * 3) & (sizeof(uintptr_t) - 1)) +
sizeof(uintptr_t))];
} CPUTLBEntry;
extern int CPUTLBEntry_wrong_size[sizeof(CPUTLBEntry) == (1 << CPU_TLB_ENTRY_BITS) ? 1 : -1];
#define CPU_COMMON_TLB \
/* The meaning of the MMU modes is defined in the target code. */ \
CPUTLBEntry tlb_table[NB_MMU_MODES][CPU_TLB_SIZE]; \
hwaddr iotlb[NB_MMU_MODES][CPU_TLB_SIZE]; \
target_ulong tlb_flush_addr; \
target_ulong tlb_flush_mask;
#else
#define CPU_COMMON_TLB
#endif
#ifdef HOST_WORDS_BIGENDIAN
typedef struct icount_decr_u16 {
uint16_t high;
uint16_t low;
} icount_decr_u16;
#else
typedef struct icount_decr_u16 {
uint16_t low;
uint16_t high;
} icount_decr_u16;
#endif
typedef struct CPUBreakpoint {
target_ulong pc;
int flags; /* BP_* */
QTAILQ_ENTRY(CPUBreakpoint) entry;
} CPUBreakpoint;
typedef struct CPUWatchpoint {
target_ulong vaddr;
target_ulong len_mask;
int flags; /* BP_* */
QTAILQ_ENTRY(CPUWatchpoint) entry;
} CPUWatchpoint;
#define CPU_TEMP_BUF_NLONGS 128
#define CPU_COMMON \
struct TranslationBlock *current_tb; /* currently executing TB */ \
/* soft mmu support */ \
/* in order to avoid passing too many arguments to the MMIO \
helpers, we store some rarely used information in the CPU \
context) */ \
uintptr_t mem_io_pc; /* host pc at which the memory was \
accessed */ \
target_ulong mem_io_vaddr; /* target virtual addr at which the \
memory was accessed */ \
uint32_t halted; /* Nonzero if the CPU is in suspend state */ \
uint32_t interrupt_request; \
volatile sig_atomic_t exit_request; \
CPU_COMMON_TLB \
struct TranslationBlock *tb_jmp_cache[TB_JMP_CACHE_SIZE]; \
/* buffer for temporaries in the code generator */ \
long temp_buf[CPU_TEMP_BUF_NLONGS]; \
\
int64_t icount_extra; /* Instructions until next timer event. */ \
/* Number of cycles left, with interrupt flag in high bit. \
This allows a single read-compare-cbranch-write sequence to test \
for both decrementer underflow and exceptions. */ \
union { \
uint32_t u32; \
icount_decr_u16 u16; \
} icount_decr; \
uint32_t can_do_io; /* nonzero if memory mapped IO is safe. */ \
\
/* from this point: preserved by CPU reset */ \
/* ice debug support */ \
QTAILQ_HEAD(breakpoints_head, CPUBreakpoint) breakpoints; \
int singlestep_enabled; \
\
QTAILQ_HEAD(watchpoints_head, CPUWatchpoint) watchpoints; \
CPUWatchpoint *watchpoint_hit; \
\
struct GDBRegisterState *gdb_regs; \
\
/* Core interrupt code */ \
jmp_buf jmp_env; \
int exception_index; \
\
CPUArchState *next_cpu; /* next CPU sharing TB cache */ \
uint32_t host_tid; /* host thread ID */ \
int running; /* Nonzero if cpu is currently running(usermode). */ \
/* user data */ \
void *opaque; \
\
const char *cpu_model_str;
#endif
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