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fdf9b3e8 FB |
1 | /* |
2 | * SH4 emulation | |
5fafdf24 | 3 | * |
fdf9b3e8 FB |
4 | * Copyright (c) 2005 Samuel Tardieu |
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_SH4_H | |
21 | #define _CPU_SH4_H | |
22 | ||
23 | #include "config.h" | |
24 | ||
25 | #define TARGET_LONG_BITS 32 | |
26 | #define TARGET_HAS_ICE 1 | |
27 | ||
9042c0e2 TS |
28 | #define ELF_MACHINE EM_SH |
29 | ||
fdf9b3e8 FB |
30 | #include "cpu-defs.h" |
31 | ||
eda9b09b FB |
32 | #include "softfloat.h" |
33 | ||
fdf9b3e8 FB |
34 | #define TARGET_PAGE_BITS 12 /* 4k XXXXX */ |
35 | ||
36 | #define SR_MD (1 << 30) | |
37 | #define SR_RB (1 << 29) | |
38 | #define SR_BL (1 << 28) | |
39 | #define SR_FD (1 << 15) | |
40 | #define SR_M (1 << 9) | |
41 | #define SR_Q (1 << 8) | |
42 | #define SR_S (1 << 1) | |
43 | #define SR_T (1 << 0) | |
44 | ||
45 | #define FPSCR_FR (1 << 21) | |
46 | #define FPSCR_SZ (1 << 20) | |
47 | #define FPSCR_PR (1 << 19) | |
48 | #define FPSCR_DN (1 << 18) | |
823029f9 | 49 | #define DELAY_SLOT (1 << 0) |
fdf9b3e8 | 50 | #define DELAY_SLOT_CONDITIONAL (1 << 1) |
823029f9 TS |
51 | #define DELAY_SLOT_TRUE (1 << 2) |
52 | #define DELAY_SLOT_CLEARME (1 << 3) | |
53 | /* The dynamic value of the DELAY_SLOT_TRUE flag determines whether the jump | |
54 | * after the delay slot should be taken or not. It is calculated from SR_T. | |
55 | * | |
56 | * It is unclear if it is permitted to modify the SR_T flag in a delay slot. | |
57 | * The use of DELAY_SLOT_TRUE flag makes us accept such SR_T modification. | |
58 | */ | |
fdf9b3e8 FB |
59 | |
60 | /* XXXXX The structure could be made more compact */ | |
61 | typedef struct tlb_t { | |
62 | uint8_t asid; /* address space identifier */ | |
63 | uint32_t vpn; /* virtual page number */ | |
64 | uint8_t v; /* validity */ | |
65 | uint32_t ppn; /* physical page number */ | |
66 | uint8_t sz; /* page size */ | |
67 | uint32_t size; /* cached page size in bytes */ | |
68 | uint8_t sh; /* share status */ | |
69 | uint8_t c; /* cacheability */ | |
70 | uint8_t pr; /* protection key */ | |
71 | uint8_t d; /* dirty */ | |
72 | uint8_t wt; /* write through */ | |
73 | uint8_t sa; /* space attribute (PCMCIA) */ | |
74 | uint8_t tc; /* timing control */ | |
75 | } tlb_t; | |
76 | ||
77 | #define UTLB_SIZE 64 | |
78 | #define ITLB_SIZE 4 | |
79 | ||
6ebbf390 JM |
80 | #define NB_MMU_MODES 2 |
81 | ||
fdf9b3e8 FB |
82 | typedef struct CPUSH4State { |
83 | uint32_t flags; /* general execution flags */ | |
84 | uint32_t gregs[24]; /* general registers */ | |
e04ea3dc | 85 | float32 fregs[32]; /* floating point registers */ |
fdf9b3e8 FB |
86 | uint32_t sr; /* status register */ |
87 | uint32_t ssr; /* saved status register */ | |
88 | uint32_t spc; /* saved program counter */ | |
89 | uint32_t gbr; /* global base register */ | |
90 | uint32_t vbr; /* vector base register */ | |
91 | uint32_t sgr; /* saved global register 15 */ | |
92 | uint32_t dbr; /* debug base register */ | |
93 | uint32_t pc; /* program counter */ | |
94 | uint32_t delayed_pc; /* target of delayed jump */ | |
95 | uint32_t mach; /* multiply and accumulate high */ | |
96 | uint32_t macl; /* multiply and accumulate low */ | |
97 | uint32_t pr; /* procedure register */ | |
98 | uint32_t fpscr; /* floating point status/control register */ | |
99 | uint32_t fpul; /* floating point communication register */ | |
100 | ||
eda9b09b FB |
101 | /* temporary float registers */ |
102 | float32 ft0, ft1; | |
103 | float64 dt0, dt1; | |
ea6cf6be | 104 | float_status fp_status; |
eda9b09b | 105 | |
fdf9b3e8 FB |
106 | /* Those belong to the specific unit (SH7750) but are handled here */ |
107 | uint32_t mmucr; /* MMU control register */ | |
108 | uint32_t pteh; /* page table entry high register */ | |
109 | uint32_t ptel; /* page table entry low register */ | |
110 | uint32_t ptea; /* page table entry assistance register */ | |
111 | uint32_t ttb; /* tranlation table base register */ | |
112 | uint32_t tea; /* TLB exception address register */ | |
113 | uint32_t tra; /* TRAPA exception register */ | |
114 | uint32_t expevt; /* exception event register */ | |
115 | uint32_t intevt; /* interrupt event register */ | |
116 | ||
117 | jmp_buf jmp_env; | |
118 | int user_mode_only; | |
119 | int interrupt_request; | |
d10927f8 | 120 | int halted; |
fdf9b3e8 FB |
121 | int exception_index; |
122 | CPU_COMMON tlb_t utlb[UTLB_SIZE]; /* unified translation table */ | |
123 | tlb_t itlb[ITLB_SIZE]; /* instruction translation table */ | |
e96e2044 | 124 | void *intc_handle; |
fdf9b3e8 FB |
125 | } CPUSH4State; |
126 | ||
aaed909a | 127 | CPUSH4State *cpu_sh4_init(const char *cpu_model); |
fdf9b3e8 | 128 | int cpu_sh4_exec(CPUSH4State * s); |
5fafdf24 | 129 | int cpu_sh4_signal_handler(int host_signum, void *pinfo, |
5a7b542b | 130 | void *puc); |
fdf9b3e8 FB |
131 | |
132 | #include "softfloat.h" | |
133 | ||
9467d44c TS |
134 | #define CPUState CPUSH4State |
135 | #define cpu_init cpu_sh4_init | |
136 | #define cpu_exec cpu_sh4_exec | |
137 | #define cpu_gen_code cpu_sh4_gen_code | |
138 | #define cpu_signal_handler cpu_sh4_signal_handler | |
139 | ||
6ebbf390 JM |
140 | /* MMU modes definitions */ |
141 | #define MMU_MODE0_SUFFIX _kernel | |
142 | #define MMU_MODE1_SUFFIX _user | |
143 | #define MMU_USER_IDX 1 | |
144 | static inline int cpu_mmu_index (CPUState *env) | |
145 | { | |
146 | return (env->sr & SR_MD) == 0 ? 1 : 0; | |
147 | } | |
148 | ||
fdf9b3e8 FB |
149 | #include "cpu-all.h" |
150 | ||
151 | /* Memory access type */ | |
152 | enum { | |
153 | /* Privilege */ | |
154 | ACCESS_PRIV = 0x01, | |
155 | /* Direction */ | |
156 | ACCESS_WRITE = 0x02, | |
157 | /* Type of instruction */ | |
158 | ACCESS_CODE = 0x10, | |
159 | ACCESS_INT = 0x20 | |
160 | }; | |
161 | ||
162 | /* MMU control register */ | |
163 | #define MMUCR 0x1F000010 | |
164 | #define MMUCR_AT (1<<0) | |
165 | #define MMUCR_SV (1<<8) | |
166 | ||
167 | #endif /* _CPU_SH4_H */ |