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., 51 Franklin Street, Fifth Floor, Boston MA  02110-1301 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 <signal.h>
  31 #include <pthread.h>
  32 #include "osdep.h"
  33 #include "sys-queue.h"
  34
  35 #ifndef TARGET_LONG_BITS
  36 #error TARGET_LONG_BITS must be defined before including this header
  37 #endif
  38
  39 #ifndef TARGET_PHYS_ADDR_BITS
  40 #if TARGET_LONG_BITS >= HOST_LONG_BITS
  41 #define TARGET_PHYS_ADDR_BITS TARGET_LONG_BITS
  42 #else
  43 #define TARGET_PHYS_ADDR_BITS HOST_LONG_BITS
  44 #endif
  45 #endif
  46
  47 #define TARGET_LONG_SIZE (TARGET_LONG_BITS / 8)
  48
  49 /* target_ulong is the type of a virtual address */
  50 #if TARGET_LONG_SIZE == 4
  51 typedef int32_t target_long;
  52 typedef uint32_t target_ulong;
  53 #define TARGET_FMT_lx "%08x"
  54 #define TARGET_FMT_ld "%d"
  55 #define TARGET_FMT_lu "%u"
  56 #elif TARGET_LONG_SIZE == 8
  57 typedef int64_t target_long;
  58 typedef uint64_t target_ulong;
  59 #define TARGET_FMT_lx "%016" PRIx64
  60 #define TARGET_FMT_ld "%" PRId64
  61 #define TARGET_FMT_lu "%" PRIu64
  62 #else
  63 #error TARGET_LONG_SIZE undefined
  64 #endif
  65
  66 /* target_phys_addr_t is the type of a physical address (its size can
  67    be different from 'target_ulong'). We have sizeof(target_phys_addr)
  68    = max(sizeof(unsigned long),
  69    sizeof(size_of_target_physical_address)) because we must pass a
  70    host pointer to memory operations in some cases */
  71
  72 #if TARGET_PHYS_ADDR_BITS == 32
  73 typedef uint32_t target_phys_addr_t;
  74 #define TARGET_FMT_plx "%08x"
  75 #elif TARGET_PHYS_ADDR_BITS == 64
  76 typedef uint64_t target_phys_addr_t;
  77 #define TARGET_FMT_plx "%016" PRIx64
  78 #else
  79 #error TARGET_PHYS_ADDR_BITS undefined
  80 #endif
  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
  89 #define TB_JMP_CACHE_BITS 12
  90 #define TB_JMP_CACHE_SIZE (1 << TB_JMP_CACHE_BITS)
  91
  92 /* Only the bottom TB_JMP_PAGE_BITS of the jump cache hash bits vary for
  93    addresses on the same page.  The top bits are the same.  This allows
  94    TLB invalidation to quickly clear a subset of the hash table.  */
  95 #define TB_JMP_PAGE_BITS (TB_JMP_CACHE_BITS / 2)
  96 #define TB_JMP_PAGE_SIZE (1 << TB_JMP_PAGE_BITS)
  97 #define TB_JMP_ADDR_MASK (TB_JMP_PAGE_SIZE - 1)
  98 #define TB_JMP_PAGE_MASK (TB_JMP_CACHE_SIZE - TB_JMP_PAGE_SIZE)
  99
 100 #define CPU_TLB_BITS 8
 101 #define CPU_TLB_SIZE (1 << CPU_TLB_BITS)
 102
 103 #if TARGET_PHYS_ADDR_BITS == 32 && TARGET_LONG_BITS == 32
 104 #define CPU_TLB_ENTRY_BITS 4
 105 #else
 106 #define CPU_TLB_ENTRY_BITS 5
 107 #endif
 108
 109 typedef struct CPUTLBEntry {
 110     /* bit TARGET_LONG_BITS to TARGET_PAGE_BITS : virtual address
 111        bit TARGET_PAGE_BITS-1..4  : Nonzero for accesses that should not
 112                                     go directly to ram.
 113        bit 3                      : indicates that the entry is invalid
 114        bit 2..0                   : zero
 115     */
 116     target_ulong addr_read;
 117     target_ulong addr_write;
 118     target_ulong addr_code;
 119     /* Addend to virtual address to get physical address.  IO accesses
 120        use the corresponding iotlb value.  */
 121 #if TARGET_PHYS_ADDR_BITS == 64
 122     /* on i386 Linux make sure it is aligned */
 123     target_phys_addr_t addend __attribute__((aligned(8)));
 124 #else
 125     target_phys_addr_t addend;
 126 #endif
 127     /* padding to get a power of two size */
 128     uint8_t dummy[(1 << CPU_TLB_ENTRY_BITS) -
 129                   (sizeof(target_ulong) * 3 +
 130                    ((-sizeof(target_ulong) * 3) & (sizeof(target_phys_addr_t) - 1)) +
 131                    sizeof(target_phys_addr_t))];
 132 } CPUTLBEntry;
 133
 134 #ifdef WORDS_BIGENDIAN
 135 typedef struct icount_decr_u16 {
 136     uint16_t high;
 137     uint16_t low;
 138 } icount_decr_u16;
 139 #else
 140 typedef struct icount_decr_u16 {
 141     uint16_t low;
 142     uint16_t high;
 143 } icount_decr_u16;
 144 #endif
 145
 146 struct kvm_run;
 147 struct KVMState;
 148
 149 typedef struct CPUBreakpoint {
 150     target_ulong pc;
 151     int flags; /* BP_* */
 152     TAILQ_ENTRY(CPUBreakpoint) entry;
 153 } CPUBreakpoint;
 154
 155 typedef struct CPUWatchpoint {
 156     target_ulong vaddr;
 157     target_ulong len_mask;
 158     int flags; /* BP_* */
 159     TAILQ_ENTRY(CPUWatchpoint) entry;
 160 } CPUWatchpoint;
 161
 162 /* forward decleration */
 163 struct qemu_work_item;
 164
 165 struct KVMCPUState {
 166     int sipi_needed;
 167     int init;
 168     pthread_t thread;
 169     int signalled;
 170     int stop;
 171     int stopped;
 172     int created;
 173     struct qemu_work_item *queued_work_first, *queued_work_last;
 174 };
 175
 176 #define CPU_TEMP_BUF_NLONGS 128
 177 #define CPU_COMMON                                                      \
 178     struct TranslationBlock *current_tb; /* currently executing TB  */  \
 179     /* soft mmu support */                                              \
 180     /* in order to avoid passing too many arguments to the MMIO         \
 181        helpers, we store some rarely used information in the CPU        \
 182        context) */                                                      \
 183     unsigned long mem_io_pc; /* host pc at which the memory was         \
 184                                 accessed */                             \
 185     target_ulong mem_io_vaddr; /* target virtual addr at which the      \
 186                                      memory was accessed */             \
 187     uint32_t halted; /* Nonzero if the CPU is in suspend state */       \
 188     uint32_t interrupt_request;                                         \
 189     volatile sig_atomic_t exit_request;                                 \
 190     /* The meaning of the MMU modes is defined in the target code. */   \
 191     CPUTLBEntry tlb_table[NB_MMU_MODES][CPU_TLB_SIZE];                  \
 192     target_phys_addr_t iotlb[NB_MMU_MODES][CPU_TLB_SIZE];               \
 193     struct TranslationBlock *tb_jmp_cache[TB_JMP_CACHE_SIZE];           \
 194     /* buffer for temporaries in the code generator */                  \
 195     long temp_buf[CPU_TEMP_BUF_NLONGS];                                 \
 196                                                                         \
 197     int64_t icount_extra; /* Instructions until next timer event.  */   \
 198     /* Number of cycles left, with interrupt flag in high bit.          \
 199        This allows a single read-compare-cbranch-write sequence to test \
 200        for both decrementer underflow and exceptions.  */               \
 201     union {                                                             \
 202         uint32_t u32;                                                   \
 203         icount_decr_u16 u16;                                            \
 204     } icount_decr;                                                      \
 205     uint32_t can_do_io; /* nonzero if memory mapped IO is safe.  */     \
 206                                                                         \
 207     /* from this point: preserved by CPU reset */                       \
 208     /* ice debug support */                                             \
 209     TAILQ_HEAD(breakpoints_head, CPUBreakpoint) breakpoints;            \
 210     int singlestep_enabled;                                             \
 211                                                                         \
 212     TAILQ_HEAD(watchpoints_head, CPUWatchpoint) watchpoints;            \
 213     CPUWatchpoint *watchpoint_hit;                                      \
 214                                                                         \
 215     struct GDBRegisterState *gdb_regs;                                  \
 216                                                                         \
 217     /* Core interrupt code */                                           \
 218     jmp_buf jmp_env;                                                    \
 219     int exception_index;                                                \
 220                                                                         \
 221     CPUState *next_cpu; /* next CPU sharing TB cache */                 \
 222     int cpu_index; /* CPU index (informative) */                        \
 223     int running; /* Nonzero if cpu is currently running(usermode).  */  \
 224     int thread_id;                                                      \
 225     /* user data */                                                     \
 226     void *opaque;                                                       \
 227                                                                         \
 228     const char *cpu_model_str;                                          \
 229     struct KVMState *kvm_state;                                         \
 230     struct kvm_run *kvm_run;                                            \
 231     int kvm_fd;                                                         \
 232     struct KVMCPUState kvm_cpu_state;
 233
 234 #endif