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1 | /* |
2 | * m68k virtual CPU header | |
3 | * | |
4 | * Copyright (c) 2005-2006 CodeSourcery | |
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 | ||
34 | #define EXCP_ACCESS 2 /* Access (MMU) error. */ | |
35 | #define EXCP_ADDRESS 3 /* Address error. */ | |
36 | #define EXCP_ILLEGAL 4 /* Illegal instruction. */ | |
37 | #define EXCP_DIV0 5 /* Divide by zero */ | |
38 | #define EXCP_PRIVILEGE 8 /* Privilege violation. */ | |
39 | #define EXCP_TRACE 9 | |
40 | #define EXCP_LINEA 10 /* Unimplemented line-A (MAC) opcode. */ | |
41 | #define EXCP_LINEF 11 /* Unimplemented line-F (FPU) opcode. */ | |
42 | #define EXCP_DEBUGNBP 12 /* Non-breakpoint debug interrupt. */ | |
43 | #define EXCP_DEBEGBP 13 /* Breakpoint debug interrupt. */ | |
44 | #define EXCP_FORMAT 14 /* RTE format error. */ | |
45 | #define EXCP_UNINITIALIZED 15 | |
46 | #define EXCP_TRAP0 32 /* User trap #0. */ | |
47 | #define EXCP_TRAP15 47 /* User trap #15. */ | |
48 | #define EXCP_UNSUPPORTED 61 | |
49 | #define EXCP_ICE 13 | |
50 | ||
51 | typedef struct CPUM68KState { | |
52 | uint32_t dregs[8]; | |
53 | uint32_t aregs[8]; | |
54 | uint32_t pc; | |
55 | uint32_t sr; | |
56 | ||
57 | /* Condition flags. */ | |
58 | uint32_t cc_op; | |
59 | uint32_t cc_dest; | |
60 | uint32_t cc_src; | |
61 | uint32_t cc_x; | |
62 | ||
63 | float64 fregs[8]; | |
64 | float64 fp_result; | |
65 | uint32_t fpcr; | |
66 | uint32_t fpsr; | |
67 | float_status fp_status; | |
68 | ||
69 | /* Temporary storage for DIV helpers. */ | |
70 | uint32_t div1; | |
71 | uint32_t div2; | |
72 | ||
73 | /* MMU status. */ | |
74 | struct { | |
75 | uint32_t ar; | |
76 | } mmu; | |
77 | /* ??? remove this. */ | |
78 | uint32_t t1; | |
79 | ||
80 | /* exception/interrupt handling */ | |
81 | jmp_buf jmp_env; | |
82 | int exception_index; | |
83 | int interrupt_request; | |
84 | int user_mode_only; | |
85 | uint32_t address; | |
86 | ||
87 | uint32_t qregs[MAX_QREGS]; | |
88 | ||
89 | CPU_COMMON | |
90 | } CPUM68KState; | |
91 | ||
92 | CPUM68KState *cpu_m68k_init(void); | |
93 | int cpu_m68k_exec(CPUM68KState *s); | |
94 | void cpu_m68k_close(CPUM68KState *s); | |
95 | /* you can call this signal handler from your SIGBUS and SIGSEGV | |
96 | signal handlers to inform the virtual CPU of exceptions. non zero | |
97 | is returned if the signal was handled by the virtual CPU. */ | |
98 | struct siginfo; | |
99 | int cpu_m68k_signal_handler(int host_signum, struct siginfo *info, | |
100 | void *puc); | |
101 | void cpu_m68k_flush_flags(CPUM68KState *, int); | |
102 | ||
103 | enum { | |
104 | CC_OP_DYNAMIC, /* Use env->cc_op */ | |
105 | CC_OP_FLAGS, /* CC_DEST = CVZN, CC_SRC = unused */ | |
106 | CC_OP_LOGIC, /* CC_DEST = result, CC_SRC = unused */ | |
107 | CC_OP_ADD, /* CC_DEST = result, CC_SRC = source */ | |
108 | CC_OP_SUB, /* CC_DEST = result, CC_SRC = source */ | |
109 | CC_OP_CMPB, /* CC_DEST = result, CC_SRC = source */ | |
110 | CC_OP_CMPW, /* CC_DEST = result, CC_SRC = source */ | |
111 | CC_OP_ADDX, /* CC_DEST = result, CC_SRC = source */ | |
112 | CC_OP_SUBX, /* CC_DEST = result, CC_SRC = source */ | |
113 | CC_OP_SHL, /* CC_DEST = source, CC_SRC = shift */ | |
114 | CC_OP_SHR, /* CC_DEST = source, CC_SRC = shift */ | |
115 | CC_OP_SAR, /* CC_DEST = source, CC_SRC = shift */ | |
116 | }; | |
117 | ||
118 | #define CCF_C 0x01 | |
119 | #define CCF_V 0x02 | |
120 | #define CCF_Z 0x04 | |
121 | #define CCF_N 0x08 | |
122 | #define CCF_X 0x01 | |
123 | ||
124 | typedef struct m68k_def_t m68k_def_t; | |
125 | ||
126 | m68k_def_t *m68k_find_by_name(const char *); | |
127 | void cpu_m68k_register(CPUM68KState *, m68k_def_t *); | |
128 | ||
129 | #define M68K_FPCR_PREC (1 << 6) | |
130 | ||
131 | #ifdef CONFIG_USER_ONLY | |
132 | /* Linux uses 8k pages. */ | |
133 | #define TARGET_PAGE_BITS 13 | |
134 | #else | |
135 | /* Smallest TLB entry size is 1k. */ | |
136 | #define TARGET_PAGE_BITS 10 | |
137 | #endif | |
138 | #include "cpu-all.h" | |
139 | ||
140 | #endif |