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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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55typedef 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
105CPUM68KState *cpu_m68k_init(void);
106int cpu_m68k_exec(CPUM68KState *s);
107void cpu_m68k_close(CPUM68KState *s);
0633879f 108void 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 112int cpu_m68k_signal_handler(int host_signum, void *pinfo,
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113 void *puc);
114void cpu_m68k_flush_flags(CPUM68KState *, int);
115
116enum {
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
143typedef struct m68k_def_t m68k_def_t;
144
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145int cpu_m68k_set_model(CPUM68KState *env, const char * name);
146
147void 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