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, see <http://www.gnu.org/licenses/>. 18 */ 19 #ifndef CPU_DEFS_H 20 #define CPU_DEFS_H 21 22 #ifndef NEED_CPU_H 23 #error cpu.h included from common code 24 #endif 25 26 #include "config.h" 27 #include <setjmp.h> 28 #include <inttypes.h> 29 #include "qemu/osdep.h" 30 #include "qemu/queue.h" 31 #ifndef CONFIG_USER_ONLY 32 #include "exec/hwaddr.h" 33 #endif 34 35 #ifndef TARGET_LONG_BITS 36 #error TARGET_LONG_BITS must be defined before including this header 37 #endif 38 39 #define TARGET_LONG_SIZE (TARGET_LONG_BITS / 8) 40 41 /* target_ulong is the type of a virtual address */ 42 #if TARGET_LONG_SIZE == 4 43 typedef int32_t target_long; 44 typedef uint32_t target_ulong; 45 #define TARGET_FMT_lx "%08x" 46 #define TARGET_FMT_ld "%d" 47 #define TARGET_FMT_lu "%u" 48 #elif TARGET_LONG_SIZE == 8 49 typedef int64_t target_long; 50 typedef uint64_t target_ulong; 51 #define TARGET_FMT_lx "%016" PRIx64 52 #define TARGET_FMT_ld "%" PRId64 53 #define TARGET_FMT_lu "%" PRIu64 54 #else 55 #error TARGET_LONG_SIZE undefined 56 #endif 57 58 #define EXCP_INTERRUPT 0x10000 /* async interruption */ 59 #define EXCP_HLT 0x10001 /* hlt instruction reached */ 60 #define EXCP_DEBUG 0x10002 /* cpu stopped after a breakpoint or singlestep */ 61 #define EXCP_HALTED 0x10003 /* cpu is halted (waiting for external event) */ 62 63 #define TB_JMP_CACHE_BITS 12 64 #define TB_JMP_CACHE_SIZE (1 << TB_JMP_CACHE_BITS) 65 66 /* Only the bottom TB_JMP_PAGE_BITS of the jump cache hash bits vary for 67 addresses on the same page. The top bits are the same. This allows 68 TLB invalidation to quickly clear a subset of the hash table. */ 69 #define TB_JMP_PAGE_BITS (TB_JMP_CACHE_BITS / 2) 70 #define TB_JMP_PAGE_SIZE (1 << TB_JMP_PAGE_BITS) 71 #define TB_JMP_ADDR_MASK (TB_JMP_PAGE_SIZE - 1) 72 #define TB_JMP_PAGE_MASK (TB_JMP_CACHE_SIZE - TB_JMP_PAGE_SIZE) 73 74 #if !defined(CONFIG_USER_ONLY) 75 #define CPU_TLB_BITS 8 76 #define CPU_TLB_SIZE (1 << CPU_TLB_BITS) 77 78 #if HOST_LONG_BITS == 32 && TARGET_LONG_BITS == 32 79 #define CPU_TLB_ENTRY_BITS 4 80 #else 81 #define CPU_TLB_ENTRY_BITS 5 82 #endif 83 84 typedef struct CPUTLBEntry { 85 /* bit TARGET_LONG_BITS to TARGET_PAGE_BITS : virtual address 86 bit TARGET_PAGE_BITS-1..4 : Nonzero for accesses that should not 87 go directly to ram. 88 bit 3 : indicates that the entry is invalid 89 bit 2..0 : zero 90 */ 91 target_ulong addr_read; 92 target_ulong addr_write; 93 target_ulong addr_code; 94 /* Addend to virtual address to get host address. IO accesses 95 use the corresponding iotlb value. */ 96 uintptr_t addend; 97 /* padding to get a power of two size */ 98 uint8_t dummy[(1 << CPU_TLB_ENTRY_BITS) - 99 (sizeof(target_ulong) * 3 + 100 ((-sizeof(target_ulong) * 3) & (sizeof(uintptr_t) - 1)) + 101 sizeof(uintptr_t))]; 102 } CPUTLBEntry; 103 104 QEMU_BUILD_BUG_ON(sizeof(CPUTLBEntry) != (1 << CPU_TLB_ENTRY_BITS)); 105 106 #define CPU_COMMON_TLB \ 107 /* The meaning of the MMU modes is defined in the target code. */ \ 108 CPUTLBEntry tlb_table[NB_MMU_MODES][CPU_TLB_SIZE]; \ 109 hwaddr iotlb[NB_MMU_MODES][CPU_TLB_SIZE]; \ 110 target_ulong tlb_flush_addr; \ 111 target_ulong tlb_flush_mask; 112 113 #else 114 115 #define CPU_COMMON_TLB 116 117 #endif 118 119 120 #ifdef HOST_WORDS_BIGENDIAN 121 typedef struct icount_decr_u16 { 122 uint16_t high; 123 uint16_t low; 124 } icount_decr_u16; 125 #else 126 typedef struct icount_decr_u16 { 127 uint16_t low; 128 uint16_t high; 129 } icount_decr_u16; 130 #endif 131 132 typedef struct CPUBreakpoint { 133 target_ulong pc; 134 int flags; /* BP_* */ 135 QTAILQ_ENTRY(CPUBreakpoint) entry; 136 } CPUBreakpoint; 137 138 typedef struct CPUWatchpoint { 139 target_ulong vaddr; 140 target_ulong len_mask; 141 int flags; /* BP_* */ 142 QTAILQ_ENTRY(CPUWatchpoint) entry; 143 } CPUWatchpoint; 144 145 #define CPU_TEMP_BUF_NLONGS 128 146 #define CPU_COMMON \ 147 /* soft mmu support */ \ 148 /* in order to avoid passing too many arguments to the MMIO \ 149 helpers, we store some rarely used information in the CPU \ 150 context) */ \ 151 uintptr_t mem_io_pc; /* host pc at which the memory was \ 152 accessed */ \ 153 target_ulong mem_io_vaddr; /* target virtual addr at which the \ 154 memory was accessed */ \ 155 CPU_COMMON_TLB \ 156 struct TranslationBlock *tb_jmp_cache[TB_JMP_CACHE_SIZE]; \ 157 \ 158 int64_t icount_extra; /* Instructions until next timer event. */ \ 159 /* Number of cycles left, with interrupt flag in high bit. \ 160 This allows a single read-compare-cbranch-write sequence to test \ 161 for both decrementer underflow and exceptions. */ \ 162 union { \ 163 uint32_t u32; \ 164 icount_decr_u16 u16; \ 165 } icount_decr; \ 166 uint32_t can_do_io; /* nonzero if memory mapped IO is safe. */ \ 167 \ 168 /* from this point: preserved by CPU reset */ \ 169 /* ice debug support */ \ 170 QTAILQ_HEAD(breakpoints_head, CPUBreakpoint) breakpoints; \ 171 \ 172 QTAILQ_HEAD(watchpoints_head, CPUWatchpoint) watchpoints; \ 173 CPUWatchpoint *watchpoint_hit; \ 174 \ 175 /* Core interrupt code */ \ 176 sigjmp_buf jmp_env; \ 177 int exception_index; \ 178 \ 179 /* user data */ \ 180 void *opaque; \ 181 182 #endif 183