qemu/cpu-defs.h

   1 /*
   2  * common defines for all CPUs
   3  *
   4  * Copyright (c) 2003 Fabrice Bellard
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20 #ifndef CPU_DEFS_H
  21 #define CPU_DEFS_H
  22
  23 #ifndef NEED_CPU_H
  24 #error cpu.h included from common code
  25 #endif
  26
  27 #include "config.h"
  28 #include <setjmp.h>
  29 #include <inttypes.h>
  30 #include "osdep.h"
  31
  32 #ifndef TARGET_LONG_BITS
  33 #error TARGET_LONG_BITS must be defined before including this header
  34 #endif
  35
  36 #ifndef TARGET_PHYS_ADDR_BITS
  37 #if TARGET_LONG_BITS >= HOST_LONG_BITS
  38 #define TARGET_PHYS_ADDR_BITS TARGET_LONG_BITS
  39 #else
  40 #define TARGET_PHYS_ADDR_BITS HOST_LONG_BITS
  41 #endif
  42 #endif
  43
  44 #define TARGET_LONG_SIZE (TARGET_LONG_BITS / 8)
  45
  46 /* target_ulong is the type of a virtual address */
  47 #if TARGET_LONG_SIZE == 4
  48 typedef int32_t target_long;
  49 typedef uint32_t target_ulong;
  50 #define TARGET_FMT_lx "%08x"
  51 #define TARGET_FMT_ld "%d"
  52 #define TARGET_FMT_lu "%u"
  53 #elif TARGET_LONG_SIZE == 8
  54 typedef int64_t target_long;
  55 typedef uint64_t target_ulong;
  56 #define TARGET_FMT_lx "%016" PRIx64
  57 #define TARGET_FMT_ld "%" PRId64
  58 #define TARGET_FMT_lu "%" PRIu64
  59 #else
  60 #error TARGET_LONG_SIZE undefined
  61 #endif
  62
  63 /* target_phys_addr_t is the type of a physical address (its size can
  64    be different from 'target_ulong'). We have sizeof(target_phys_addr)
  65    = max(sizeof(unsigned long),
  66    sizeof(size_of_target_physical_address)) because we must pass a
  67    host pointer to memory operations in some cases */
  68
  69 #if TARGET_PHYS_ADDR_BITS == 32
  70 typedef uint32_t target_phys_addr_t;
  71 #define TARGET_FMT_plx "%08x"
  72 #elif TARGET_PHYS_ADDR_BITS == 64
  73 typedef uint64_t target_phys_addr_t;
  74 #define TARGET_FMT_plx "%016" PRIx64
  75 #else
  76 #error TARGET_PHYS_ADDR_BITS undefined
  77 #endif
  78
  79 /* address in the RAM (different from a physical address) */
  80 typedef unsigned long ram_addr_t;
  81
  82 #define HOST_LONG_SIZE (HOST_LONG_BITS / 8)
  83
  84 #define EXCP_INTERRUPT  0x10000 /* async interruption */
  85 #define EXCP_HLT        0x10001 /* hlt instruction reached */
  86 #define EXCP_DEBUG      0x10002 /* cpu stopped after a breakpoint or singlestep */
  87 #define EXCP_HALTED     0x10003 /* cpu is halted (waiting for external event) */
  88 #define MAX_BREAKPOINTS 32
  89 #define MAX_WATCHPOINTS 32
  90
  91 #define TB_JMP_CACHE_BITS 12
  92 #define TB_JMP_CACHE_SIZE (1 << TB_JMP_CACHE_BITS)
  93
  94 /* Only the bottom TB_JMP_PAGE_BITS of the jump cache hash bits vary for
  95    addresses on the same page.  The top bits are the same.  This allows
  96    TLB invalidation to quickly clear a subset of the hash table.  */
  97 #define TB_JMP_PAGE_BITS (TB_JMP_CACHE_BITS / 2)
  98 #define TB_JMP_PAGE_SIZE (1 << TB_JMP_PAGE_BITS)
  99 #define TB_JMP_ADDR_MASK (TB_JMP_PAGE_SIZE - 1)
 100 #define TB_JMP_PAGE_MASK (TB_JMP_CACHE_SIZE - TB_JMP_PAGE_SIZE)
 101
 102 #define CPU_TLB_BITS 8
 103 #define CPU_TLB_SIZE (1 << CPU_TLB_BITS)
 104
 105 typedef struct CPUTLBEntry {
 106     /* bit 31 to TARGET_PAGE_BITS : virtual address
 107        bit TARGET_PAGE_BITS-1..IO_MEM_SHIFT : if non zero, memory io
 108                                               zone number
 109        bit 3                      : indicates that the entry is invalid
 110        bit 2..0                   : zero
 111     */
 112     target_ulong addr_read;
 113     target_ulong addr_write;
 114     target_ulong addr_code;
 115     /* addend to virtual address to get physical address */
 116     target_phys_addr_t addend;
 117 } CPUTLBEntry;
 118
 119 #define CPU_COMMON                                                      \
 120     struct TranslationBlock *current_tb; /* currently executing TB  */  \
 121     /* soft mmu support */                                              \
 122     /* in order to avoid passing too many arguments to the memory       \
 123        write helpers, we store some rarely used information in the CPU  \
 124        context) */                                                      \
 125     unsigned long mem_write_pc; /* host pc at which the memory was      \
 126                                    written */                           \
 127     target_ulong mem_write_vaddr; /* target virtual addr at which the   \
 128                                      memory was written */              \
 129     /* The meaning of the MMU modes is defined in the target code. */   \
 130     CPUTLBEntry tlb_table[NB_MMU_MODES][CPU_TLB_SIZE];                  \
 131     struct TranslationBlock *tb_jmp_cache[TB_JMP_CACHE_SIZE];           \
 132                                                                         \
 133     /* from this point: preserved by CPU reset */                       \
 134     /* ice debug support */                                             \
 135     target_ulong breakpoints[MAX_BREAKPOINTS];                          \
 136     int nb_breakpoints;                                                 \
 137     int singlestep_enabled;                                             \
 138                                                                         \
 139     struct {                                                            \
 140         target_ulong vaddr;                                             \
 141         target_phys_addr_t addend;                                      \
 142     } watchpoint[MAX_WATCHPOINTS];                                      \
 143     int nb_watchpoints;                                                 \
 144     int watchpoint_hit;                                                 \
 145                                                                         \
 146     void *next_cpu; /* next CPU sharing TB cache */                     \
 147     int cpu_index; /* CPU index (informative) */                        \
 148     /* user data */                                                     \
 149     void *opaque;                                                       \
 150                                                                         \
 151     const char *cpu_model_str;
 152
 153 #endif