mirror of
https://github.com/holub/mame
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f326c2c29e
encryption junk. Changed encryption interfaces to pass the CPU core object. Unwound several levels of macros for accessing memory. Still more to do.
267 lines
9.9 KiB
C
267 lines
9.9 KiB
C
#pragma once
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#ifndef __M68K_H__
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#define __M68K_H__
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/* ======================================================================== */
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/* ========================= LICENSING & COPYRIGHT ======================== */
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/* ======================================================================== */
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/*
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* MUSASHI
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* Version 3.32
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*
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* A portable Motorola M680x0 processor emulation engine.
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* Copyright Karl Stenerud. All rights reserved.
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*
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* This code may be freely used for non-commercial purposes as long as this
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* copyright notice remains unaltered in the source code and any binary files
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* containing this code in compiled form.
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*
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* All other licensing terms must be negotiated with the author
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* (Karl Stenerud).
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*
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* The latest version of this code can be obtained at:
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* http://kstenerud.cjb.net
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*/
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/* ======================================================================== */
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/* ============================ GENERAL DEFINES =========================== */
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/* ======================================================================== */
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/* CPU types for use in m68k_set_cpu_type() */
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enum
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{
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M68K_CPU_TYPE_INVALID,
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M68K_CPU_TYPE_68000,
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M68K_CPU_TYPE_68008,
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M68K_CPU_TYPE_68010,
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M68K_CPU_TYPE_68EC020,
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M68K_CPU_TYPE_68020,
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M68K_CPU_TYPE_68030, /* Supported by disassembler ONLY */
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M68K_CPU_TYPE_68040 /* Supported by disassembler ONLY */
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};
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/* Registers used by m68k_get_reg() and m68k_set_reg() */
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enum _m68k_register_t
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{
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/* Real registers */
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M68K_REG_D0, /* Data registers */
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M68K_REG_D1,
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M68K_REG_D2,
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M68K_REG_D3,
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M68K_REG_D4,
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M68K_REG_D5,
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M68K_REG_D6,
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M68K_REG_D7,
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M68K_REG_A0, /* Address registers */
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M68K_REG_A1,
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M68K_REG_A2,
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M68K_REG_A3,
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M68K_REG_A4,
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M68K_REG_A5,
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M68K_REG_A6,
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M68K_REG_A7,
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M68K_REG_PC, /* Program Counter */
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M68K_REG_SR, /* Status Register */
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M68K_REG_SP, /* The current Stack Pointer (located in A7) */
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M68K_REG_USP, /* User Stack Pointer */
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M68K_REG_ISP, /* Interrupt Stack Pointer */
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M68K_REG_MSP, /* Master Stack Pointer */
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M68K_REG_SFC, /* Source Function Code */
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M68K_REG_DFC, /* Destination Function Code */
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M68K_REG_VBR, /* Vector Base Register */
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M68K_REG_CACR, /* Cache Control Register */
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M68K_REG_CAAR, /* Cache Address Register */
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/* Assumed registers */
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/* These are cheat registers which emulate the 1-longword prefetch
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* present in the 68000 and 68010.
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*/
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M68K_REG_PREF_ADDR, /* Last prefetch address */
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M68K_REG_PREF_DATA, /* Last prefetch data */
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/* Convenience registers */
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M68K_REG_PPC, /* Previous value in the program counter */
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M68K_REG_IR, /* Instruction register */
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M68K_REG_CPU_TYPE /* Type of CPU being run */
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};
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typedef enum _m68k_register_t m68k_register_t;
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/* ======================================================================== */
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/* ============================== CALLBACKS =============================== */
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/* ======================================================================== */
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/* These functions allow you to set callbacks to the host when specific events
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* occur. Note that you must enable the corresponding value in m68kconf.h
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* in order for these to do anything useful.
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* Note: I have defined default callbacks which are used if you have enabled
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* the corresponding #define in m68kconf.h but either haven't assigned a
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* callback or have assigned a callback of NULL.
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*/
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/* Set the callback for an interrupt acknowledge.
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* The CPU will call the callback with the interrupt level being acknowledged.
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* The host program must return either a vector from 0x02-0xff, or one of the
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* special interrupt acknowledge values specified earlier in this header.
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* If this is not implemented, the CPU will always assume an autovectored
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* interrupt, and will automatically clear the interrupt request when it
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* services the interrupt.
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* Default behavior: return M68K_INT_ACK_AUTOVECTOR.
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*/
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void m68k_set_int_ack_callback(m68ki_cpu_core *m68k, void *param, int (*callback)(void *param, int int_level));
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/* Set the callback for a breakpoint acknowledge (68010+).
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* The CPU will call the callback with whatever was in the data field of the
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* BKPT instruction for 68020+, or 0 for 68010.
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* Default behavior: do nothing.
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*/
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void m68k_set_bkpt_ack_callback(m68ki_cpu_core *m68k, void (*callback)(unsigned int data));
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/* Set the callback for the RESET instruction.
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* The CPU calls this callback every time it encounters a RESET instruction.
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* Default behavior: do nothing.
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*/
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void m68k_set_reset_instr_callback(m68ki_cpu_core *m68k, void (*callback)(void));
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/* Set the callback for the CMPI.L #v, Dn instruction.
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* The CPU calls this callback every time it encounters a CMPI.L #v, Dn instruction.
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* Default behavior: do nothing.
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*/
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void m68k_set_cmpild_instr_callback(m68ki_cpu_core *m68k, void (*callback)(unsigned int val, int reg));
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/* Set the callback for the RTE instruction.
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* The CPU calls this callback every time it encounters a RTE instruction.
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* Default behavior: do nothing.
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*/
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void m68k_set_rte_instr_callback(m68ki_cpu_core *m68k, void (*callback)(void));
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/* Set the callback for the TAS instruction.
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* The CPU calls this callback every time it encounters a TAS instruction.
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* Default behavior: return 1, allow writeback.
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*/
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void m68k_set_tas_instr_callback(m68ki_cpu_core *m68k, int (*callback)(void));
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/* Set the callback for CPU function code changes.
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* You must enable M68K_EMULATE_FC in m68kconf.h.
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* The CPU calls this callback with the function code before every memory
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* access to set the CPU's function code according to what kind of memory
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* access it is (supervisor/user, program/data and such).
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* Default behavior: do nothing.
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*/
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void m68k_set_fc_callback(m68ki_cpu_core *m68k, void (*callback)(unsigned int new_fc));
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/* ======================================================================== */
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/* ====================== FUNCTIONS TO ACCESS THE CPU ===================== */
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/* ======================================================================== */
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/* Use this function to set the CPU type you want to emulate.
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* Currently supported types are: M68K_CPU_TYPE_68000, M68K_CPU_TYPE_68008,
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* M68K_CPU_TYPE_68010, M68K_CPU_TYPE_EC020, and M68K_CPU_TYPE_68020.
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*/
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void m68k_set_cpu_type(m68ki_cpu_core *m68k, unsigned int cpu_type);
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/* Do whatever initialisations the core requires. Should be called
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* at least once at init time.
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*/
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void m68k_init(m68ki_cpu_core *m68k);
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/* Pulse the RESET pin on the CPU.
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* You *MUST* reset the CPU at least once to initialize the emulation
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* Note: If you didn't call m68k_set_cpu_type() before resetting
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* the CPU for the first time, the CPU will be set to
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* M68K_CPU_TYPE_68000.
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*/
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void m68k_pulse_reset(m68ki_cpu_core *m68k);
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/* execute num_cycles worth of instructions. returns number of cycles used */
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int m68k_execute(m68ki_cpu_core *m68k, int num_cycles);
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/* These functions let you read/write/modify the number of cycles left to run
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* while m68k_execute() is running.
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* These are useful if the 68k accesses a memory-mapped port on another device
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* that requires immediate processing by another CPU.
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*/
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int m68k_cycles_run(m68ki_cpu_core *m68k); /* Number of cycles run so far */
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int m68k_cycles_remaining(m68ki_cpu_core *m68k); /* Number of cycles left */
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void m68k_modify_timeslice(m68ki_cpu_core *m68k, int cycles); /* Modify cycles left */
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void m68k_end_timeslice(m68ki_cpu_core *m68k); /* End timeslice now */
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/* Set the IPL0-IPL2 pins on the CPU (IRQ).
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* A transition from < 7 to 7 will cause a non-maskable interrupt (NMI).
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* Setting IRQ to 0 will clear an interrupt request.
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*/
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void m68k_set_irq(m68ki_cpu_core *m68k, unsigned int int_level);
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/* Set the virtual irq lines, where the highest level
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* active line is automatically selected. If you use this function,
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* do not use m68k_set_irq.
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*/
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void m68k_set_virq(m68ki_cpu_core *m68k, unsigned int level, unsigned int active);
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unsigned int m68k_get_virq(m68ki_cpu_core *m68k, unsigned int level);
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/* Halt the CPU as if you pulsed the HALT pin. */
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void m68k_pulse_halt(m68ki_cpu_core *m68k);
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/* Context switching to allow multiple CPUs */
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/* Get the size of the cpu context in bytes */
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unsigned int m68k_context_size(void);
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/* Get a cpu context */
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unsigned int m68k_get_context(void* dst);
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/* set the current cpu context */
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void m68k_set_context(void* dst);
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/* Register the CPU state information */
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void m68k_state_register(m68ki_cpu_core *m68k, const char *type, int index);
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/* Peek at the internals of a CPU context. This can either be a context
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* retrieved using m68k_get_context() or the currently running context.
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* If context is NULL, the currently running CPU context will be used.
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*/
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unsigned int m68k_get_reg(m68ki_cpu_core *m68k, m68k_register_t regnum);
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/* Poke values into the internals of the currently running CPU context */
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void m68k_set_reg(m68ki_cpu_core *m68k, m68k_register_t reg, unsigned int value);
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/* Check if an instruction is valid for the specified CPU type */
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unsigned int m68k_is_valid_instruction(unsigned int instruction, unsigned int cpu_type);
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/* Disassemble 1 instruction using the epecified CPU type at pc. Stores
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* disassembly in str_buff and returns the size of the instruction in bytes.
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*/
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unsigned int m68k_disassemble(char* str_buff, unsigned int pc, unsigned int cpu_type);
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/* Same as above but accepts raw opcode data directly rather than fetching
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* via the read/write interfaces.
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*/
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unsigned int m68k_disassemble_raw(char* str_buff, unsigned int pc, const unsigned char* opdata, const unsigned char* argdata, unsigned int cpu_type);
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/* ======================================================================== */
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/* ============================== MAME STUFF ============================== */
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/* ======================================================================== */
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#include "m68kmame.h"
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/* ======================================================================== */
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/* ============================== END OF FILE ============================= */
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/* ======================================================================== */
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#endif /* __M68K_H__ */
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