2 * common defines for all CPUs
4 * Copyright (c) 2003 Fabrice Bellard
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.
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.
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/>.
23 #error cpu.h included from common code
29 #include "qemu/osdep.h"
30 #include "qemu/queue.h"
31 #ifndef CONFIG_USER_ONLY
32 #include "exec/hwaddr.h"
35 #ifndef TARGET_LONG_BITS
36 #error TARGET_LONG_BITS must be defined before including this header
39 #define TARGET_LONG_SIZE (TARGET_LONG_BITS / 8)
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
55 #error TARGET_LONG_SIZE undefined
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 #define EXCP_YIELD 0x10004 /* cpu wants to yield timeslice to another */
64 #define TB_JMP_CACHE_BITS 12
65 #define TB_JMP_CACHE_SIZE (1 << TB_JMP_CACHE_BITS)
67 /* Only the bottom TB_JMP_PAGE_BITS of the jump cache hash bits vary for
68 addresses on the same page. The top bits are the same. This allows
69 TLB invalidation to quickly clear a subset of the hash table. */
70 #define TB_JMP_PAGE_BITS (TB_JMP_CACHE_BITS / 2)
71 #define TB_JMP_PAGE_SIZE (1 << TB_JMP_PAGE_BITS)
72 #define TB_JMP_ADDR_MASK (TB_JMP_PAGE_SIZE - 1)
73 #define TB_JMP_PAGE_MASK (TB_JMP_CACHE_SIZE - TB_JMP_PAGE_SIZE)
75 #if !defined(CONFIG_USER_ONLY)
76 #define CPU_TLB_BITS 8
77 #define CPU_TLB_SIZE (1 << CPU_TLB_BITS)
79 #if HOST_LONG_BITS == 32 && TARGET_LONG_BITS == 32
80 #define CPU_TLB_ENTRY_BITS 4
82 #define CPU_TLB_ENTRY_BITS 5
85 typedef struct CPUTLBEntry {
86 /* bit TARGET_LONG_BITS to TARGET_PAGE_BITS : virtual address
87 bit TARGET_PAGE_BITS-1..4 : Nonzero for accesses that should not
89 bit 3 : indicates that the entry is invalid
92 target_ulong addr_read;
93 target_ulong addr_write;
94 target_ulong addr_code;
95 /* Addend to virtual address to get host address. IO accesses
96 use the corresponding iotlb value. */
98 /* padding to get a power of two size */
99 uint8_t dummy[(1 << CPU_TLB_ENTRY_BITS) -
100 (sizeof(target_ulong) * 3 +
101 ((-sizeof(target_ulong) * 3) & (sizeof(uintptr_t) - 1)) +
105 QEMU_BUILD_BUG_ON(sizeof(CPUTLBEntry) != (1 << CPU_TLB_ENTRY_BITS));
107 #define CPU_COMMON_TLB \
108 /* The meaning of the MMU modes is defined in the target code. */ \
109 CPUTLBEntry tlb_table[NB_MMU_MODES][CPU_TLB_SIZE]; \
110 hwaddr iotlb[NB_MMU_MODES][CPU_TLB_SIZE]; \
111 target_ulong tlb_flush_addr; \
112 target_ulong tlb_flush_mask;
116 #define CPU_COMMON_TLB
121 #ifdef HOST_WORDS_BIGENDIAN
122 typedef struct icount_decr_u16 {
127 typedef struct icount_decr_u16 {
133 typedef struct CPUBreakpoint {
135 int flags; /* BP_* */
136 QTAILQ_ENTRY(CPUBreakpoint) entry;
139 typedef struct CPUWatchpoint {
141 target_ulong len_mask;
142 int flags; /* BP_* */
143 QTAILQ_ENTRY(CPUWatchpoint) entry;
146 #define CPU_TEMP_BUF_NLONGS 128
148 /* soft mmu support */ \
149 /* in order to avoid passing too many arguments to the MMIO \
150 helpers, we store some rarely used information in the CPU \
152 uintptr_t mem_io_pc; /* host pc at which the memory was \
154 target_ulong mem_io_vaddr; /* target virtual addr at which the \
155 memory was accessed */ \
157 struct TranslationBlock *tb_jmp_cache[TB_JMP_CACHE_SIZE]; \
159 int64_t icount_extra; /* Instructions until next timer event. */ \
160 /* Number of cycles left, with interrupt flag in high bit. \
161 This allows a single read-compare-cbranch-write sequence to test \
162 for both decrementer underflow and exceptions. */ \
165 icount_decr_u16 u16; \
167 uint32_t can_do_io; /* nonzero if memory mapped IO is safe. */ \
169 /* from this point: preserved by CPU reset */ \
170 /* ice debug support */ \
171 QTAILQ_HEAD(breakpoints_head, CPUBreakpoint) breakpoints; \
173 QTAILQ_HEAD(watchpoints_head, CPUWatchpoint) watchpoints; \
174 CPUWatchpoint *watchpoint_hit; \
176 /* Core interrupt code */ \
177 sigjmp_buf jmp_env; \
178 int exception_index; \