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Diffstat (limited to 'plugins/ao/eng_ssf/m68k.h')
| -rw-r--r-- | plugins/ao/eng_ssf/m68k.h | 347 |
1 files changed, 0 insertions, 347 deletions
diff --git a/plugins/ao/eng_ssf/m68k.h b/plugins/ao/eng_ssf/m68k.h deleted file mode 100644 index 851c7132..00000000 --- a/plugins/ao/eng_ssf/m68k.h +++ /dev/null @@ -1,347 +0,0 @@ -#ifndef M68K__HEADER -#define M68K__HEADER - -struct m68ki_cpu_core_s; - -/* ======================================================================== */ -/* ========================= 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_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(struct m68ki_cpu_core_s *cpu, unsigned int address); -unsigned int m68k_read_memory_16(struct m68ki_cpu_core_s *cpu, unsigned int address); -unsigned int m68k_read_memory_32(struct m68ki_cpu_core_s *cpu, unsigned int address); - -/* Read data immediately following the PC */ -//INLINE unsigned int m68k_read_immediate_16(unsigned int address); -//INLINE unsigned int m68k_read_immediate_32(unsigned int address); - -/* Read data relative to the PC */ -//INLINE unsigned int m68k_read_pcrelative_8(unsigned int address); -//INLINE unsigned int m68k_read_pcrelative_16(unsigned int address); -//INLINE unsigned int m68k_read_pcrelative_32(unsigned int address); - -/* Memory access for the disassembler */ -unsigned int m68k_read_disassembler_8 (struct m68ki_cpu_core_s *cpu, unsigned int address); -unsigned int m68k_read_disassembler_16 (struct m68ki_cpu_core_s *cpu, unsigned int address); -unsigned int m68k_read_disassembler_32 (struct m68ki_cpu_core_s *cpu, unsigned int address); - -/* Write to anywhere */ -void m68k_write_memory_8(struct m68ki_cpu_core_s *cpu, unsigned int address, unsigned int value); -void m68k_write_memory_16(struct m68ki_cpu_core_s *cpu, unsigned int address, unsigned int value); -void m68k_write_memory_32(struct m68ki_cpu_core_s *cpu, 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. - */ -//INLINE 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(struct m68ki_cpu_core_s *cpu, int (*callback)(struct m68ki_cpu_core_s *cpu, 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(struct m68ki_cpu_core_s *cpu, void (*callback)(struct m68ki_cpu_core_s *cpu, 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(struct m68ki_cpu_core_s *cpu, void (*callback)(struct m68ki_cpu_core_s *cpu)); - - -/* 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(struct m68ki_cpu_core_s *cpu, void (*callback)(struct m68ki_cpu_core_s *cpu, 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(struct m68ki_cpu_core_s *cpu, void (*callback)(struct m68ki_cpu_core_s *cpu, 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(struct m68ki_cpu_core_s *cpu, void (*callback)(struct m68ki_cpu_core_s *cpu)); - - - -/* ======================================================================== */ -/* ====================== 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_68010, - * M68K_CPU_TYPE_EC020, and M68K_CPU_TYPE_68020. - */ -void m68k_set_cpu_type(struct m68ki_cpu_core_s *cpu, unsigned int cpu_type); - -/* Do whatever initialisations the core requires. Should be called - * at least once at init time. - */ -struct m68ki_cpu_core_s *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(struct m68ki_cpu_core_s *cpu); - -/* execute num_cycles worth of instructions. returns number of cycles used */ -int m68k_execute(struct m68ki_cpu_core_s *cpu, 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(struct m68ki_cpu_core_s *cpu); /* Number of cycles run so far */ -int m68k_cycles_remaining(struct m68ki_cpu_core_s *cpu); /* Number of cycles left */ -void m68k_modify_timeslice(struct m68ki_cpu_core_s *cpu, int cycles); /* Modify cycles left */ -void m68k_end_timeslice(struct m68ki_cpu_core_s *cpu); /* 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(struct m68ki_cpu_core_s *cpu, unsigned int int_level); - - -/* Halt the CPU as if you pulsed the HALT pin. */ -void m68k_pulse_halt(struct m68ki_cpu_core_s *cpu); - - -#if 0 -/* Context switching to allow multiple CPUs */ - -/* Get the size of the cpu context in bytes */ -unsigned int m68k_context_size(struct m68ki_cpu_core_s *cpu); - -/* Get a cpu context */ -unsigned int m68k_get_context(struct m68ki_cpu_core_s *cpu, void* dst); - -/* set the current cpu context */ -void m68k_set_context(struct m68ki_cpu_core_s *cpu, void* dst); -#endif - -/* Register the CPU state information */ -void m68k_state_register(struct m68ki_cpu_core_s *cpu, 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(struct m68ki_cpu_core_s *cpu, void* context, m68k_register_t reg); - -/* Poke values into the internals of the currently running CPU context */ -void m68k_set_reg(struct m68ki_cpu_core_s *cpu, m68k_register_t reg, unsigned int value); - -/* Check if an instruction is valid for the specified CPU type */ -unsigned int m68k_is_valid_instruction(struct m68ki_cpu_core_s *cpu, 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(struct m68ki_cpu_core_s *cpu, char* str_buff, unsigned int pc, unsigned int cpu_type); - - -/* ======================================================================== */ -/* ============================= CONFIGURATION ============================ */ -/* ======================================================================== */ - -/* Import the configuration for this build */ -#include "m68kconf.h" - - - -/* ======================================================================== */ -/* ============================== END OF FILE ============================= */ -/* ======================================================================== */ - -#endif /* M68K__HEADER */ |