0633879f1a
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2851 c046a42c-6fe2-441c-8c8c-71466251a162
161 lines
4.5 KiB
C
161 lines
4.5 KiB
C
/*
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* m68k virtual CPU header
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*
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* Copyright (c) 2005-2007 CodeSourcery
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* Written by Paul Brook
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef CPU_M68K_H
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#define CPU_M68K_H
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#define TARGET_LONG_BITS 32
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#include "cpu-defs.h"
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#include "softfloat.h"
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#define MAX_QREGS 32
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#define TARGET_HAS_ICE 1
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#define ELF_MACHINE EM_68K
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#define EXCP_ACCESS 2 /* Access (MMU) error. */
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#define EXCP_ADDRESS 3 /* Address error. */
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#define EXCP_ILLEGAL 4 /* Illegal instruction. */
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#define EXCP_DIV0 5 /* Divide by zero */
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#define EXCP_PRIVILEGE 8 /* Privilege violation. */
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#define EXCP_TRACE 9
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#define EXCP_LINEA 10 /* Unimplemented line-A (MAC) opcode. */
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#define EXCP_LINEF 11 /* Unimplemented line-F (FPU) opcode. */
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#define EXCP_DEBUGNBP 12 /* Non-breakpoint debug interrupt. */
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#define EXCP_DEBEGBP 13 /* Breakpoint debug interrupt. */
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#define EXCP_FORMAT 14 /* RTE format error. */
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#define EXCP_UNINITIALIZED 15
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#define EXCP_TRAP0 32 /* User trap #0. */
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#define EXCP_TRAP15 47 /* User trap #15. */
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#define EXCP_UNSUPPORTED 61
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#define EXCP_ICE 13
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#define EXCP_RTE 0x100
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typedef struct CPUM68KState {
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uint32_t dregs[8];
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uint32_t aregs[8];
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uint32_t pc;
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uint32_t sr;
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/* Condition flags. */
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uint32_t cc_op;
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uint32_t cc_dest;
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uint32_t cc_src;
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uint32_t cc_x;
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float64 fregs[8];
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float64 fp_result;
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uint32_t fpcr;
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uint32_t fpsr;
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float_status fp_status;
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/* Temporary storage for DIV helpers. */
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uint32_t div1;
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uint32_t div2;
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/* MMU status. */
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struct {
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uint32_t ar;
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} mmu;
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/* Control registers. */
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uint32_t vbr;
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uint32_t mbar;
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uint32_t rambar0;
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/* ??? remove this. */
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uint32_t t1;
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/* exception/interrupt handling */
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jmp_buf jmp_env;
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int exception_index;
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int interrupt_request;
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int user_mode_only;
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int halted;
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int pending_vector;
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int pending_level;
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uint32_t qregs[MAX_QREGS];
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CPU_COMMON
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} CPUM68KState;
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CPUM68KState *cpu_m68k_init(void);
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int cpu_m68k_exec(CPUM68KState *s);
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void cpu_m68k_close(CPUM68KState *s);
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void do_interrupt(int is_hw);
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/* you can call this signal handler from your SIGBUS and SIGSEGV
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signal handlers to inform the virtual CPU of exceptions. non zero
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is returned if the signal was handled by the virtual CPU. */
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int cpu_m68k_signal_handler(int host_signum, void *pinfo,
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void *puc);
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void cpu_m68k_flush_flags(CPUM68KState *, int);
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enum {
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CC_OP_DYNAMIC, /* Use env->cc_op */
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CC_OP_FLAGS, /* CC_DEST = CVZN, CC_SRC = unused */
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CC_OP_LOGIC, /* CC_DEST = result, CC_SRC = unused */
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CC_OP_ADD, /* CC_DEST = result, CC_SRC = source */
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CC_OP_SUB, /* CC_DEST = result, CC_SRC = source */
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CC_OP_CMPB, /* CC_DEST = result, CC_SRC = source */
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CC_OP_CMPW, /* CC_DEST = result, CC_SRC = source */
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CC_OP_ADDX, /* CC_DEST = result, CC_SRC = source */
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CC_OP_SUBX, /* CC_DEST = result, CC_SRC = source */
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CC_OP_SHL, /* CC_DEST = source, CC_SRC = shift */
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CC_OP_SHR, /* CC_DEST = source, CC_SRC = shift */
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CC_OP_SAR, /* CC_DEST = source, CC_SRC = shift */
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};
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#define CCF_C 0x01
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#define CCF_V 0x02
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#define CCF_Z 0x04
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#define CCF_N 0x08
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#define CCF_X 0x10
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#define SR_I_SHIFT 8
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#define SR_I 0x0700
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#define SR_M 0x1000
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#define SR_S 0x2000
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#define SR_T 0x8000
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typedef struct m68k_def_t m68k_def_t;
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int cpu_m68k_set_model(CPUM68KState *env, const char * name);
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void m68k_set_irq_level(CPUM68KState *env, int level, uint8_t vector);
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#define M68K_FPCR_PREC (1 << 6)
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#ifdef CONFIG_USER_ONLY
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/* Linux uses 8k pages. */
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#define TARGET_PAGE_BITS 13
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#else
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/* Smallest TLB entry size is 1k. */
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#define TARGET_PAGE_BITS 10
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#endif
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#include "cpu-all.h"
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#endif
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