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Diffstat (limited to 'target-m68k/cpu.h')
| -rw-r--r-- | target-m68k/cpu.h | 140 |
1 files changed, 140 insertions, 0 deletions
diff --git a/target-m68k/cpu.h b/target-m68k/cpu.h new file mode 100644 index 0000000000..29e02e8bb2 --- /dev/null +++ b/target-m68k/cpu.h @@ -0,0 +1,140 @@ +/* + * m68k virtual CPU header + * + * Copyright (c) 2005-2006 CodeSourcery + * Written by Paul Brook + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ +#ifndef CPU_M68K_H +#define CPU_M68K_H + +#define TARGET_LONG_BITS 32 + +#include "cpu-defs.h" + +#include "softfloat.h" + +#define MAX_QREGS 32 + +#define TARGET_HAS_ICE 1 + +#define EXCP_ACCESS 2 /* Access (MMU) error. */ +#define EXCP_ADDRESS 3 /* Address error. */ +#define EXCP_ILLEGAL 4 /* Illegal instruction. */ +#define EXCP_DIV0 5 /* Divide by zero */ +#define EXCP_PRIVILEGE 8 /* Privilege violation. */ +#define EXCP_TRACE 9 +#define EXCP_LINEA 10 /* Unimplemented line-A (MAC) opcode. */ +#define EXCP_LINEF 11 /* Unimplemented line-F (FPU) opcode. */ +#define EXCP_DEBUGNBP 12 /* Non-breakpoint debug interrupt. */ +#define EXCP_DEBEGBP 13 /* Breakpoint debug interrupt. */ +#define EXCP_FORMAT 14 /* RTE format error. */ +#define EXCP_UNINITIALIZED 15 +#define EXCP_TRAP0 32 /* User trap #0. */ +#define EXCP_TRAP15 47 /* User trap #15. */ +#define EXCP_UNSUPPORTED 61 +#define EXCP_ICE 13 + +typedef struct CPUM68KState { + uint32_t dregs[8]; + uint32_t aregs[8]; + uint32_t pc; + uint32_t sr; + + /* Condition flags. */ + uint32_t cc_op; + uint32_t cc_dest; + uint32_t cc_src; + uint32_t cc_x; + + float64 fregs[8]; + float64 fp_result; + uint32_t fpcr; + uint32_t fpsr; + float_status fp_status; + + /* Temporary storage for DIV helpers. */ + uint32_t div1; + uint32_t div2; + + /* MMU status. */ + struct { + uint32_t ar; + } mmu; + /* ??? remove this. */ + uint32_t t1; + + /* exception/interrupt handling */ + jmp_buf jmp_env; + int exception_index; + int interrupt_request; + int user_mode_only; + uint32_t address; + + uint32_t qregs[MAX_QREGS]; + + CPU_COMMON +} CPUM68KState; + +CPUM68KState *cpu_m68k_init(void); +int cpu_m68k_exec(CPUM68KState *s); +void cpu_m68k_close(CPUM68KState *s); +/* you can call this signal handler from your SIGBUS and SIGSEGV + signal handlers to inform the virtual CPU of exceptions. non zero + is returned if the signal was handled by the virtual CPU. */ +struct siginfo; +int cpu_m68k_signal_handler(int host_signum, struct siginfo *info, + void *puc); +void cpu_m68k_flush_flags(CPUM68KState *, int); + +enum { + CC_OP_DYNAMIC, /* Use env->cc_op */ + CC_OP_FLAGS, /* CC_DEST = CVZN, CC_SRC = unused */ + CC_OP_LOGIC, /* CC_DEST = result, CC_SRC = unused */ + CC_OP_ADD, /* CC_DEST = result, CC_SRC = source */ + CC_OP_SUB, /* CC_DEST = result, CC_SRC = source */ + CC_OP_CMPB, /* CC_DEST = result, CC_SRC = source */ + CC_OP_CMPW, /* CC_DEST = result, CC_SRC = source */ + CC_OP_ADDX, /* CC_DEST = result, CC_SRC = source */ + CC_OP_SUBX, /* CC_DEST = result, CC_SRC = source */ + CC_OP_SHL, /* CC_DEST = source, CC_SRC = shift */ + CC_OP_SHR, /* CC_DEST = source, CC_SRC = shift */ + CC_OP_SAR, /* CC_DEST = source, CC_SRC = shift */ +}; + +#define CCF_C 0x01 +#define CCF_V 0x02 +#define CCF_Z 0x04 +#define CCF_N 0x08 +#define CCF_X 0x01 + +typedef struct m68k_def_t m68k_def_t; + +m68k_def_t *m68k_find_by_name(const char *); +void cpu_m68k_register(CPUM68KState *, m68k_def_t *); + +#define M68K_FPCR_PREC (1 << 6) + +#ifdef CONFIG_USER_ONLY +/* Linux uses 8k pages. */ +#define TARGET_PAGE_BITS 13 +#else +/* Smallest TLB entry size is 1k. */ +#define TARGET_PAGE_BITS 10 +#endif +#include "cpu-all.h" + +#endif |