2 * m68k virtual CPU header
4 * Copyright (c) 2005-2006 CodeSourcery
5 * Written by Paul Brook
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.
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.
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
24 #define TARGET_LONG_BITS 32
28 #include "softfloat.h"
32 #define TARGET_HAS_ICE 1
34 #define ELF_MACHINE EM_68K
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. */
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
53 typedef struct CPUM68KState
{
59 /* Condition flags. */
69 float_status fp_status
;
71 /* Temporary storage for DIV helpers. */
79 /* ??? remove this. */
82 /* exception/interrupt handling */
85 int interrupt_request
;
89 uint32_t qregs
[MAX_QREGS
];
94 CPUM68KState
*cpu_m68k_init(void);
95 int cpu_m68k_exec(CPUM68KState
*s
);
96 void cpu_m68k_close(CPUM68KState
*s
);
97 /* you can call this signal handler from your SIGBUS and SIGSEGV
98 signal handlers to inform the virtual CPU of exceptions. non zero
99 is returned if the signal was handled by the virtual CPU. */
100 int cpu_m68k_signal_handler(int host_signum
, void *pinfo
,
102 void cpu_m68k_flush_flags(CPUM68KState
*, int);
105 CC_OP_DYNAMIC
, /* Use env->cc_op */
106 CC_OP_FLAGS
, /* CC_DEST = CVZN, CC_SRC = unused */
107 CC_OP_LOGIC
, /* CC_DEST = result, CC_SRC = unused */
108 CC_OP_ADD
, /* CC_DEST = result, CC_SRC = source */
109 CC_OP_SUB
, /* CC_DEST = result, CC_SRC = source */
110 CC_OP_CMPB
, /* CC_DEST = result, CC_SRC = source */
111 CC_OP_CMPW
, /* CC_DEST = result, CC_SRC = source */
112 CC_OP_ADDX
, /* CC_DEST = result, CC_SRC = source */
113 CC_OP_SUBX
, /* CC_DEST = result, CC_SRC = source */
114 CC_OP_SHL
, /* CC_DEST = source, CC_SRC = shift */
115 CC_OP_SHR
, /* CC_DEST = source, CC_SRC = shift */
116 CC_OP_SAR
, /* CC_DEST = source, CC_SRC = shift */
125 typedef struct m68k_def_t m68k_def_t
;
127 m68k_def_t
*m68k_find_by_name(const char *);
128 void cpu_m68k_register(CPUM68KState
*, m68k_def_t
*);
130 #define M68K_FPCR_PREC (1 << 6)
132 #ifdef CONFIG_USER_ONLY
133 /* Linux uses 8k pages. */
134 #define TARGET_PAGE_BITS 13
136 /* Smallest TLB entry size is 1k. */
137 #define TARGET_PAGE_BITS 10