2011-07-12 04:57:12 +00:00
|
|
|
/**
|
|
|
|
** Supermodel
|
|
|
|
** A Sega Model 3 Arcade Emulator.
|
2011-09-14 19:08:43 +00:00
|
|
|
** Copyright 2011 Bart Trzynadlowski, Nik Henson
|
2011-07-12 04:57:12 +00:00
|
|
|
**
|
|
|
|
** This file is part of Supermodel.
|
|
|
|
**
|
|
|
|
** Supermodel is free software: you can redistribute it and/or modify it under
|
|
|
|
** the terms of the GNU General Public License as published by the Free
|
|
|
|
** Software Foundation, either version 3 of the License, or (at your option)
|
|
|
|
** any later version.
|
|
|
|
**
|
|
|
|
** Supermodel 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 General Public License along
|
|
|
|
** with Supermodel. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
**/
|
|
|
|
|
|
|
|
/*
|
|
|
|
* m68k.h
|
|
|
|
*
|
|
|
|
* Header file for the Musashi 68K emulator.
|
|
|
|
*
|
|
|
|
* Permission was obtained from Karl Stenerud to apply the GPL license to this
|
|
|
|
* code.
|
|
|
|
*/
|
|
|
|
|
|
|
|
#ifndef M68K__HEADER
|
|
|
|
#define M68K__HEADER
|
|
|
|
|
|
|
|
#ifdef __cplusplus
|
|
|
|
extern "C" {
|
|
|
|
#endif
|
|
|
|
|
|
|
|
/* ======================================================================== */
|
|
|
|
/* ========================= LICENSING & COPYRIGHT ======================== */
|
|
|
|
/* ======================================================================== */
|
|
|
|
/*
|
|
|
|
* MUSASHI
|
|
|
|
* Version 3.3
|
|
|
|
*
|
|
|
|
* A portable Motorola M680x0 processor emulation engine.
|
|
|
|
* Copyright 1998-2001 Karl Stenerud. All rights reserved.
|
|
|
|
*
|
|
|
|
* This code may be freely used for non-commercial purposes as long as this
|
|
|
|
* copyright notice remains unaltered in the source code and any binary files
|
|
|
|
* containing this code in compiled form.
|
|
|
|
*
|
|
|
|
* All other lisencing terms must be negotiated with the author
|
|
|
|
* (Karl Stenerud).
|
|
|
|
*
|
|
|
|
* The latest version of this code can be obtained at:
|
|
|
|
* http://kstenerud.cjb.net
|
|
|
|
*/
|
|
|
|
|
|
|
|
/* ======================================================================== */
|
|
|
|
/* ============================ GENERAL DEFINES =========================== */
|
|
|
|
|
|
|
|
/* ======================================================================== */
|
|
|
|
|
|
|
|
/* There are 7 levels of interrupt to the 68K.
|
|
|
|
* A transition from < 7 to 7 will cause a non-maskable interrupt (NMI).
|
|
|
|
*/
|
|
|
|
#define M68K_IRQ_NONE 0
|
|
|
|
#define M68K_IRQ_1 1
|
|
|
|
#define M68K_IRQ_2 2
|
|
|
|
#define M68K_IRQ_3 3
|
|
|
|
#define M68K_IRQ_4 4
|
|
|
|
#define M68K_IRQ_5 5
|
|
|
|
#define M68K_IRQ_6 6
|
|
|
|
#define M68K_IRQ_7 7
|
|
|
|
|
|
|
|
|
|
|
|
/* Special interrupt acknowledge values.
|
|
|
|
* Use these as special returns from the interrupt acknowledge callback
|
|
|
|
* (specified later in this header).
|
|
|
|
*/
|
|
|
|
|
|
|
|
/* Causes an interrupt autovector (0x18 + interrupt level) to be taken.
|
|
|
|
* This happens in a real 68K if VPA or AVEC is asserted during an interrupt
|
|
|
|
* acknowledge cycle instead of DTACK.
|
|
|
|
*/
|
|
|
|
#define M68K_INT_ACK_AUTOVECTOR 0xffffffff
|
|
|
|
|
|
|
|
/* Causes the spurious interrupt vector (0x18) to be taken
|
|
|
|
* This happens in a real 68K if BERR is asserted during the interrupt
|
|
|
|
* acknowledge cycle (i.e. no devices responded to the acknowledge).
|
|
|
|
*/
|
|
|
|
#define M68K_INT_ACK_SPURIOUS 0xfffffffe
|
|
|
|
|
|
|
|
|
|
|
|
/* CPU types for use in m68k_set_cpu_type() */
|
|
|
|
enum
|
|
|
|
{
|
|
|
|
M68K_CPU_TYPE_INVALID,
|
|
|
|
M68K_CPU_TYPE_68000,
|
|
|
|
M68K_CPU_TYPE_68008,
|
|
|
|
M68K_CPU_TYPE_68010,
|
|
|
|
M68K_CPU_TYPE_68EC020,
|
|
|
|
M68K_CPU_TYPE_68020,
|
|
|
|
M68K_CPU_TYPE_68030, /* Supported by disassembler ONLY */
|
|
|
|
M68K_CPU_TYPE_68040 /* Supported by disassembler ONLY */
|
|
|
|
};
|
|
|
|
|
|
|
|
/* Registers used by m68k_get_reg() and m68k_set_reg() */
|
|
|
|
typedef enum
|
|
|
|
{
|
|
|
|
/* Real registers */
|
|
|
|
M68K_REG_D0, /* Data registers */
|
|
|
|
M68K_REG_D1,
|
|
|
|
M68K_REG_D2,
|
|
|
|
M68K_REG_D3,
|
|
|
|
M68K_REG_D4,
|
|
|
|
M68K_REG_D5,
|
|
|
|
M68K_REG_D6,
|
|
|
|
M68K_REG_D7,
|
|
|
|
M68K_REG_A0, /* Address registers */
|
|
|
|
M68K_REG_A1,
|
|
|
|
M68K_REG_A2,
|
|
|
|
M68K_REG_A3,
|
|
|
|
M68K_REG_A4,
|
|
|
|
M68K_REG_A5,
|
|
|
|
M68K_REG_A6,
|
|
|
|
M68K_REG_A7,
|
|
|
|
M68K_REG_PC, /* Program Counter */
|
|
|
|
M68K_REG_SR, /* Status Register */
|
|
|
|
M68K_REG_SP, /* The current Stack Pointer (located in A7) */
|
|
|
|
M68K_REG_USP, /* User Stack Pointer */
|
|
|
|
M68K_REG_ISP, /* Interrupt Stack Pointer */
|
|
|
|
M68K_REG_MSP, /* Master Stack Pointer */
|
|
|
|
M68K_REG_SFC, /* Source Function Code */
|
|
|
|
M68K_REG_DFC, /* Destination Function Code */
|
|
|
|
M68K_REG_VBR, /* Vector Base Register */
|
|
|
|
M68K_REG_CACR, /* Cache Control Register */
|
|
|
|
M68K_REG_CAAR, /* Cache Address Register */
|
|
|
|
|
|
|
|
/* Assumed registers */
|
|
|
|
/* These are cheat registers which emulate the 1-longword prefetch
|
|
|
|
* present in the 68000 and 68010.
|
|
|
|
*/
|
|
|
|
M68K_REG_PREF_ADDR, /* Last prefetch address */
|
|
|
|
M68K_REG_PREF_DATA, /* Last prefetch data */
|
|
|
|
|
|
|
|
/* Convenience registers */
|
|
|
|
M68K_REG_PPC, /* Previous value in the program counter */
|
|
|
|
M68K_REG_IR, /* Instruction register */
|
|
|
|
M68K_REG_CPU_TYPE /* Type of CPU being run */
|
|
|
|
} m68k_register_t;
|
|
|
|
|
|
|
|
/* ======================================================================== */
|
|
|
|
/* ====================== FUNCTIONS CALLED BY THE CPU ===================== */
|
|
|
|
/* ======================================================================== */
|
|
|
|
|
|
|
|
/* You will have to implement these functions */
|
|
|
|
|
|
|
|
/* read/write functions called by the CPU to access memory.
|
|
|
|
* while values used are 32 bits, only the appropriate number
|
|
|
|
* of bits are relevant (i.e. in write_memory_8, only the lower 8 bits
|
|
|
|
* of value should be written to memory).
|
|
|
|
*
|
|
|
|
* NOTE: I have separated the immediate and PC-relative memory fetches
|
|
|
|
* from the other memory fetches because some systems require
|
|
|
|
* differentiation between PROGRAM and DATA fetches (usually
|
|
|
|
* for security setups such as encryption).
|
|
|
|
* This separation can either be achieved by setting
|
|
|
|
* M68K_SEPARATE_READS in m68kconf.h and defining
|
|
|
|
* the read functions, or by setting M68K_EMULATE_FC and
|
|
|
|
* making a function code callback function.
|
|
|
|
* Using the callback offers better emulation coverage
|
|
|
|
* because you can also monitor whether the CPU is in SYSTEM or
|
|
|
|
* USER mode, but it is also slower.
|
|
|
|
*/
|
|
|
|
|
|
|
|
/* Read from anywhere */
|
|
|
|
unsigned int m68k_read_memory_8(unsigned int address);
|
|
|
|
unsigned int m68k_read_memory_16(unsigned int address);
|
|
|
|
unsigned int m68k_read_memory_32(unsigned int address);
|
|
|
|
|
|
|
|
/* Read data immediately following the PC */
|
|
|
|
unsigned int m68k_read_immediate_16(unsigned int address);
|
|
|
|
unsigned int m68k_read_immediate_32(unsigned int address);
|
|
|
|
|
|
|
|
/* Read data relative to the PC */
|
|
|
|
unsigned int m68k_read_pcrelative_8(unsigned int address);
|
|
|
|
unsigned int m68k_read_pcrelative_16(unsigned int address);
|
|
|
|
unsigned int m68k_read_pcrelative_32(unsigned int address);
|
|
|
|
|
|
|
|
/* Memory access for the disassembler */
|
|
|
|
unsigned int m68k_read_disassembler_8 (unsigned int address);
|
|
|
|
unsigned int m68k_read_disassembler_16 (unsigned int address);
|
|
|
|
unsigned int m68k_read_disassembler_32 (unsigned int address);
|
|
|
|
|
|
|
|
/* Write to anywhere */
|
|
|
|
void m68k_write_memory_8(unsigned int address, unsigned int value);
|
|
|
|
void m68k_write_memory_16(unsigned int address, unsigned int value);
|
|
|
|
void m68k_write_memory_32(unsigned int address, unsigned int value);
|
|
|
|
|
|
|
|
/* Special call to simulate undocumented 68k behavior when move.l with a
|
|
|
|
* predecrement destination mode is executed.
|
|
|
|
* To simulate real 68k behavior, first write the high word to
|
|
|
|
* [address+2], and then write the low word to [address].
|
|
|
|
*
|
|
|
|
* Enable this functionality with M68K_SIMULATE_PD_WRITES in m68kconf.h.
|
|
|
|
*/
|
|
|
|
void m68k_write_memory_32_pd(unsigned int address, unsigned int value);
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/* ======================================================================== */
|
|
|
|
/* ============================== CALLBACKS =============================== */
|
|
|
|
/* ======================================================================== */
|
|
|
|
|
|
|
|
/* These functions allow you to set callbacks to the host when specific events
|
|
|
|
* occur. Note that you must enable the corresponding value in m68kconf.h
|
|
|
|
* in order for these to do anything useful.
|
|
|
|
* Note: I have defined default callbacks which are used if you have enabled
|
|
|
|
* the corresponding #define in m68kconf.h but either haven't assigned a
|
|
|
|
* callback or have assigned a callback of NULL.
|
|
|
|
*/
|
|
|
|
|
|
|
|
/* Set the callback for an interrupt acknowledge.
|
|
|
|
* You must enable M68K_EMULATE_INT_ACK in m68kconf.h.
|
|
|
|
* The CPU will call the callback with the interrupt level being acknowledged.
|
|
|
|
* The host program must return either a vector from 0x02-0xff, or one of the
|
|
|
|
* special interrupt acknowledge values specified earlier in this header.
|
|
|
|
* If this is not implemented, the CPU will always assume an autovectored
|
|
|
|
* interrupt, and will automatically clear the interrupt request when it
|
|
|
|
* services the interrupt.
|
|
|
|
* Default behavior: return M68K_INT_ACK_AUTOVECTOR.
|
|
|
|
*/
|
|
|
|
void m68k_set_int_ack_callback(int (*callback)(int int_level));
|
|
|
|
|
|
|
|
|
|
|
|
/* Set the callback for a breakpoint acknowledge (68010+).
|
|
|
|
* You must enable M68K_EMULATE_BKPT_ACK in m68kconf.h.
|
|
|
|
* The CPU will call the callback with whatever was in the data field of the
|
|
|
|
* BKPT instruction for 68020+, or 0 for 68010.
|
|
|
|
* Default behavior: do nothing.
|
|
|
|
*/
|
|
|
|
void m68k_set_bkpt_ack_callback(void (*callback)(unsigned int data));
|
|
|
|
|
|
|
|
|
|
|
|
/* Set the callback for the RESET instruction.
|
|
|
|
* You must enable M68K_EMULATE_RESET in m68kconf.h.
|
|
|
|
* The CPU calls this callback every time it encounters a RESET instruction.
|
|
|
|
* Default behavior: do nothing.
|
|
|
|
*/
|
|
|
|
void m68k_set_reset_instr_callback(void (*callback)(void));
|
|
|
|
|
|
|
|
|
|
|
|
/* Set the callback for the CMPI.L #v, Dn instruction.
|
|
|
|
* You must enable M68K_CMPILD_HAS_CALLBACK in m68kconf.h.
|
|
|
|
* The CPU calls this callback every time it encounters a CMPI.L #v, Dn instruction.
|
|
|
|
* Default behavior: do nothing.
|
|
|
|
*/
|
|
|
|
void m68k_set_cmpild_instr_callback(void (*callback)(unsigned int val, int reg));
|
|
|
|
|
|
|
|
|
|
|
|
/* Set the callback for the RTE instruction.
|
|
|
|
* You must enable M68K_RTE_HAS_CALLBACK in m68kconf.h.
|
|
|
|
* The CPU calls this callback every time it encounters a RTE instruction.
|
|
|
|
* Default behavior: do nothing.
|
|
|
|
*/
|
|
|
|
void m68k_set_rte_instr_callback(void (*callback)(void));
|
|
|
|
|
|
|
|
|
|
|
|
/* Set the callback for informing of a large PC change.
|
|
|
|
* You must enable M68K_MONITOR_PC in m68kconf.h.
|
|
|
|
* The CPU calls this callback with the new PC value every time the PC changes
|
|
|
|
* by a large value (currently set for changes by longwords).
|
|
|
|
* Default behavior: do nothing.
|
|
|
|
*/
|
|
|
|
void m68k_set_pc_changed_callback(void (*callback)(unsigned int new_pc));
|
|
|
|
|
|
|
|
|
|
|
|
/* Set the callback for CPU function code changes.
|
|
|
|
* You must enable M68K_EMULATE_FC in m68kconf.h.
|
|
|
|
* The CPU calls this callback with the function code before every memory
|
|
|
|
* access to set the CPU's function code according to what kind of memory
|
|
|
|
* access it is (supervisor/user, program/data and such).
|
|
|
|
* Default behavior: do nothing.
|
|
|
|
*/
|
|
|
|
void m68k_set_fc_callback(void (*callback)(unsigned int new_fc));
|
|
|
|
|
|
|
|
|
|
|
|
/* Set a callback for the instruction cycle of the CPU.
|
|
|
|
* You must enable M68K_INSTRUCTION_HOOK in m68kconf.h.
|
|
|
|
* The CPU calls this callback just before fetching the opcode in the
|
|
|
|
* instruction cycle.
|
|
|
|
* Default behavior: do nothing.
|
|
|
|
*/
|
|
|
|
void m68k_set_instr_hook_callback(void (*callback)(void));
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/* ======================================================================== */
|
|
|
|
/* ====================== FUNCTIONS TO ACCESS THE CPU ===================== */
|
|
|
|
/* ======================================================================== */
|
|
|
|
|
|
|
|
/* Use this function to set the CPU type you want to emulate.
|
|
|
|
* Currently supported types are: M68K_CPU_TYPE_68000, M68K_CPU_TYPE_68008,
|
|
|
|
* M68K_CPU_TYPE_68010, M68K_CPU_TYPE_EC020, and M68K_CPU_TYPE_68020.
|
|
|
|
*/
|
|
|
|
void m68k_set_cpu_type(unsigned int cpu_type);
|
|
|
|
|
|
|
|
/* Do whatever initialisations the core requires. Should be called
|
|
|
|
* at least once at init time.
|
|
|
|
*/
|
|
|
|
void m68k_init(void);
|
|
|
|
|
|
|
|
/* Pulse the RESET pin on the CPU.
|
|
|
|
* You *MUST* reset the CPU at least once to initialize the emulation
|
|
|
|
* Note: If you didn't call m68k_set_cpu_type() before resetting
|
|
|
|
* the CPU for the first time, the CPU will be set to
|
|
|
|
* M68K_CPU_TYPE_68000.
|
|
|
|
*/
|
|
|
|
void m68k_pulse_reset(void);
|
|
|
|
|
|
|
|
/* execute num_cycles worth of instructions. returns number of cycles used */
|
|
|
|
int m68k_execute(int num_cycles);
|
|
|
|
|
|
|
|
/* These functions let you read/write/modify the number of cycles left to run
|
|
|
|
* while m68k_execute() is running.
|
|
|
|
* These are useful if the 68k accesses a memory-mapped port on another device
|
|
|
|
* that requires immediate processing by another CPU.
|
|
|
|
*/
|
|
|
|
int m68k_cycles_run(void); /* Number of cycles run so far */
|
|
|
|
int m68k_cycles_remaining(void); /* Number of cycles left */
|
|
|
|
void m68k_modify_timeslice(int cycles); /* Modify cycles left */
|
|
|
|
void m68k_end_timeslice(void); /* End timeslice now */
|
|
|
|
|
|
|
|
/* Set the IPL0-IPL2 pins on the CPU (IRQ).
|
|
|
|
* A transition from < 7 to 7 will cause a non-maskable interrupt (NMI).
|
|
|
|
* Setting IRQ to 0 will clear an interrupt request.
|
|
|
|
*/
|
|
|
|
void m68k_set_irq(unsigned int int_level);
|
|
|
|
|
|
|
|
|
|
|
|
/* Halt the CPU as if you pulsed the HALT pin. */
|
|
|
|
void m68k_pulse_halt(void);
|
|
|
|
|
|
|
|
|
|
|
|
/* Context switching to allow multiple CPUs */
|
|
|
|
|
|
|
|
/* Get the size of the cpu context in bytes */
|
|
|
|
unsigned int m68k_context_size(void);
|
|
|
|
|
|
|
|
/* Get a cpu context */
|
|
|
|
unsigned int m68k_get_context(void* dst);
|
|
|
|
|
|
|
|
/* set the current cpu context */
|
|
|
|
void m68k_set_context(void* dst);
|
|
|
|
|
|
|
|
/* Register the CPU state information */
|
|
|
|
void m68k_state_register(const char *type);
|
|
|
|
|
|
|
|
|
|
|
|
/* Peek at the internals of a CPU context. This can either be a context
|
|
|
|
* retrieved using m68k_get_context() or the currently running context.
|
|
|
|
* If context is NULL, the currently running CPU context will be used.
|
|
|
|
*/
|
|
|
|
unsigned int m68k_get_reg(void* context, m68k_register_t reg);
|
|
|
|
|
|
|
|
/* Poke values into the internals of the currently running CPU context */
|
|
|
|
void m68k_set_reg(m68k_register_t reg, unsigned int value);
|
|
|
|
|
|
|
|
/* Check if an instruction is valid for the specified CPU type */
|
|
|
|
unsigned int m68k_is_valid_instruction(unsigned int instruction, unsigned int cpu_type);
|
|
|
|
|
|
|
|
/* Disassemble 1 instruction using the epecified CPU type at pc. Stores
|
|
|
|
* disassembly in str_buff and returns the size of the instruction in bytes.
|
|
|
|
*/
|
|
|
|
unsigned int m68k_disassemble(char* str_buff, unsigned int pc, unsigned int cpu_type);
|
|
|
|
|
|
|
|
|
|
|
|
/* ======================================================================== */
|
|
|
|
/* ============================= CONFIGURATION ============================ */
|
|
|
|
/* ======================================================================== */
|
|
|
|
|
|
|
|
/* Import the configuration for this build */
|
|
|
|
#include "m68kconf.h"
|
|
|
|
|
|
|
|
|
|
|
|
/* ======================================================================== */
|
|
|
|
/* ============================== END OF FILE ============================= */
|
|
|
|
/* ======================================================================== */
|
|
|
|
|
|
|
|
#ifdef __cplusplus
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
|
|
|
|
#endif /* M68K__HEADER */
|