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1 | /* |
2 | * m68k virtual CPU header | |
3 | * | |
0633879f | 4 | * Copyright (c) 2005-2007 CodeSourcery |
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5 | * Written by Paul Brook |
6 | * | |
7 | * This library is free software; you can redistribute it and/or | |
8 | * modify it under the terms of the GNU Lesser General Public | |
9 | * License as published by the Free Software Foundation; either | |
10 | * version 2 of the License, or (at your option) any later version. | |
11 | * | |
12 | * This library is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 | * General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU Lesser General Public | |
18 | * License along with this library; if not, write to the Free Software | |
19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
20 | */ | |
21 | #ifndef CPU_M68K_H | |
22 | #define CPU_M68K_H | |
23 | ||
24 | #define TARGET_LONG_BITS 32 | |
25 | ||
26 | #include "cpu-defs.h" | |
27 | ||
28 | #include "softfloat.h" | |
29 | ||
30 | #define MAX_QREGS 32 | |
31 | ||
32 | #define TARGET_HAS_ICE 1 | |
33 | ||
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34 | #define ELF_MACHINE EM_68K |
35 | ||
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36 | #define EXCP_ACCESS 2 /* Access (MMU) error. */ |
37 | #define EXCP_ADDRESS 3 /* Address error. */ | |
38 | #define EXCP_ILLEGAL 4 /* Illegal instruction. */ | |
39 | #define EXCP_DIV0 5 /* Divide by zero */ | |
40 | #define EXCP_PRIVILEGE 8 /* Privilege violation. */ | |
41 | #define EXCP_TRACE 9 | |
42 | #define EXCP_LINEA 10 /* Unimplemented line-A (MAC) opcode. */ | |
43 | #define EXCP_LINEF 11 /* Unimplemented line-F (FPU) opcode. */ | |
44 | #define EXCP_DEBUGNBP 12 /* Non-breakpoint debug interrupt. */ | |
45 | #define EXCP_DEBEGBP 13 /* Breakpoint debug interrupt. */ | |
46 | #define EXCP_FORMAT 14 /* RTE format error. */ | |
47 | #define EXCP_UNINITIALIZED 15 | |
48 | #define EXCP_TRAP0 32 /* User trap #0. */ | |
49 | #define EXCP_TRAP15 47 /* User trap #15. */ | |
50 | #define EXCP_UNSUPPORTED 61 | |
51 | #define EXCP_ICE 13 | |
52 | ||
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53 | #define EXCP_RTE 0x100 |
54 | ||
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55 | typedef struct CPUM68KState { |
56 | uint32_t dregs[8]; | |
57 | uint32_t aregs[8]; | |
58 | uint32_t pc; | |
59 | uint32_t sr; | |
60 | ||
61 | /* Condition flags. */ | |
62 | uint32_t cc_op; | |
63 | uint32_t cc_dest; | |
64 | uint32_t cc_src; | |
65 | uint32_t cc_x; | |
66 | ||
67 | float64 fregs[8]; | |
68 | float64 fp_result; | |
69 | uint32_t fpcr; | |
70 | uint32_t fpsr; | |
71 | float_status fp_status; | |
72 | ||
73 | /* Temporary storage for DIV helpers. */ | |
74 | uint32_t div1; | |
75 | uint32_t div2; | |
76 | ||
77 | /* MMU status. */ | |
78 | struct { | |
79 | uint32_t ar; | |
80 | } mmu; | |
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81 | |
82 | /* Control registers. */ | |
83 | uint32_t vbr; | |
84 | uint32_t mbar; | |
85 | uint32_t rambar0; | |
86 | ||
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87 | /* ??? remove this. */ |
88 | uint32_t t1; | |
89 | ||
90 | /* exception/interrupt handling */ | |
91 | jmp_buf jmp_env; | |
92 | int exception_index; | |
93 | int interrupt_request; | |
94 | int user_mode_only; | |
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95 | int halted; |
96 | ||
97 | int pending_vector; | |
98 | int pending_level; | |
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99 | |
100 | uint32_t qregs[MAX_QREGS]; | |
101 | ||
102 | CPU_COMMON | |
103 | } CPUM68KState; | |
104 | ||
105 | CPUM68KState *cpu_m68k_init(void); | |
106 | int cpu_m68k_exec(CPUM68KState *s); | |
107 | void cpu_m68k_close(CPUM68KState *s); | |
0633879f | 108 | void do_interrupt(int is_hw); |
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109 | /* you can call this signal handler from your SIGBUS and SIGSEGV |
110 | signal handlers to inform the virtual CPU of exceptions. non zero | |
111 | is returned if the signal was handled by the virtual CPU. */ | |
5a7b542b | 112 | int cpu_m68k_signal_handler(int host_signum, void *pinfo, |
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113 | void *puc); |
114 | void cpu_m68k_flush_flags(CPUM68KState *, int); | |
115 | ||
116 | enum { | |
117 | CC_OP_DYNAMIC, /* Use env->cc_op */ | |
118 | CC_OP_FLAGS, /* CC_DEST = CVZN, CC_SRC = unused */ | |
119 | CC_OP_LOGIC, /* CC_DEST = result, CC_SRC = unused */ | |
120 | CC_OP_ADD, /* CC_DEST = result, CC_SRC = source */ | |
121 | CC_OP_SUB, /* CC_DEST = result, CC_SRC = source */ | |
122 | CC_OP_CMPB, /* CC_DEST = result, CC_SRC = source */ | |
123 | CC_OP_CMPW, /* CC_DEST = result, CC_SRC = source */ | |
124 | CC_OP_ADDX, /* CC_DEST = result, CC_SRC = source */ | |
125 | CC_OP_SUBX, /* CC_DEST = result, CC_SRC = source */ | |
126 | CC_OP_SHL, /* CC_DEST = source, CC_SRC = shift */ | |
127 | CC_OP_SHR, /* CC_DEST = source, CC_SRC = shift */ | |
128 | CC_OP_SAR, /* CC_DEST = source, CC_SRC = shift */ | |
129 | }; | |
130 | ||
131 | #define CCF_C 0x01 | |
132 | #define CCF_V 0x02 | |
133 | #define CCF_Z 0x04 | |
134 | #define CCF_N 0x08 | |
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135 | #define CCF_X 0x10 |
136 | ||
137 | #define SR_I_SHIFT 8 | |
138 | #define SR_I 0x0700 | |
139 | #define SR_M 0x1000 | |
140 | #define SR_S 0x2000 | |
141 | #define SR_T 0x8000 | |
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142 | |
143 | typedef struct m68k_def_t m68k_def_t; | |
144 | ||
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145 | int cpu_m68k_set_model(CPUM68KState *env, const char * name); |
146 | ||
147 | void m68k_set_irq_level(CPUM68KState *env, int level, uint8_t vector); | |
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148 | |
149 | #define M68K_FPCR_PREC (1 << 6) | |
150 | ||
151 | #ifdef CONFIG_USER_ONLY | |
152 | /* Linux uses 8k pages. */ | |
153 | #define TARGET_PAGE_BITS 13 | |
154 | #else | |
155 | /* Smallest TLB entry size is 1k. */ | |
156 | #define TARGET_PAGE_BITS 10 | |
157 | #endif | |
158 | #include "cpu-all.h" | |
159 | ||
160 | #endif |