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228 lines
8.0 KiB
C
228 lines
8.0 KiB
C
/* ======================================================================== */
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/* ========================= LICENSING & COPYRIGHT ======================== */
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/* ======================================================================== */
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/*
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* MUSASHI
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* Version 3.4
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*
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* A portable Motorola M680x0 processor emulation engine.
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* Copyright 1998-2001 Karl Stenerud. All rights reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#ifndef M68KCONF__HEADER
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#define M68KCONF__HEADER
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/* Configuration switches.
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* Use OPT_SPECIFY_HANDLER for configuration options that allow callbacks.
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* OPT_SPECIFY_HANDLER causes the core to link directly to the function
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* or macro you specify, rather than using callback functions whose pointer
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* must be passed in using m68k_set_xxx_callback().
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*/
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#define OPT_OFF 0
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#define OPT_ON 1
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#define OPT_SPECIFY_HANDLER 2
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/* ======================================================================== */
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/* ============================== MAME STUFF ============================== */
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/* ======================================================================== */
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/* If you're compiling this for MAME, only change M68K_COMPILE_FOR_MAME
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* to OPT_ON and use m68kmame.h to configure the 68k core.
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*/
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#ifndef M68K_COMPILE_FOR_MAME
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#define M68K_COMPILE_FOR_MAME OPT_OFF
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#endif /* M68K_COMPILE_FOR_MAME */
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#if M68K_COMPILE_FOR_MAME == OPT_OFF
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/* ======================================================================== */
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/* ============================= CONFIGURATION ============================ */
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/* ======================================================================== */
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/* Turn ON if you want to use the following M68K variants */
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#define M68K_EMULATE_010 OPT_OFF
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#define M68K_EMULATE_EC020 OPT_OFF
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#define M68K_EMULATE_020 OPT_OFF
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/* If ON, the CPU will call m68k_read_immediate_xx() for immediate addressing
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* and m68k_read_pcrelative_xx() for PC-relative addressing.
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* If off, all read requests from the CPU will be redirected to m68k_read_xx()
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*/
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#define M68K_SEPARATE_READS OPT_ON
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//#define M68K_SEPARATE_READS OPT_OFF
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/* If ON, the CPU will call m68k_write_32_pd() when it executes move.l with a
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* predecrement destination EA mode instead of m68k_write_32().
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* To simulate real 68k behavior, m68k_write_32_pd() must first write the high
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* word to [address+2], and then write the low word to [address].
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*/
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#define M68K_SIMULATE_PD_WRITES OPT_OFF
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/* If ON, CPU will call the interrupt acknowledge callback when it services an
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* interrupt.
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* If off, all interrupts will be autovectored and all interrupt requests will
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* auto-clear when the interrupt is serviced.
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*/
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#define M68K_EMULATE_INT_ACK OPT_OFF
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#define M68K_INT_ACK_CALLBACK(A) m68k_int_ack(A)
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/* If ON, CPU will call the breakpoint acknowledge callback when it encounters
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* a breakpoint instruction and it is running a 68010+.
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*/
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#define M68K_EMULATE_BKPT_ACK OPT_OFF
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#define M68K_BKPT_ACK_CALLBACK() your_bkpt_ack_handler_function()
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/* If ON, the CPU will monitor the trace flags and take trace exceptions
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*/
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#define M68K_EMULATE_TRACE OPT_OFF
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/* If ON, CPU will call the output reset callback when it encounters a reset
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* instruction.
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*/
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#define M68K_EMULATE_RESET OPT_OFF
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#define M68K_RESET_CALLBACK() your_reset_handler_function()
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/* If ON, CPU will call the set fc callback on every memory access to
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* differentiate between user/supervisor, program/data access like a real
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* 68000 would. This should be enabled and the callback should be set if you
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* want to properly emulate the m68010 or higher. (moves uses function codes
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* to read/write data from different address spaces)
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*/
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#define M68K_EMULATE_FC OPT_OFF
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#define M68K_SET_FC_CALLBACK(A) your_set_fc_handler_function(A)
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/* If ON, CPU will call the pc changed callback when it changes the PC by a
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* large value. This allows host programs to be nicer when it comes to
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* fetching immediate data and instructions on a banked memory system.
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*/
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#define M68K_MONITOR_PC OPT_SPECIFY_HANDLER
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#define M68K_SET_PC_CALLBACK(A) m68k_pc_changed_handler_function(A)
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void m68k_pc_changed_handler_function(unsigned int addr);
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/* If ON, CPU will call the instruction hook callback before every
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* instruction.
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*/
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//#define M68K_INSTRUCTION_HOOK OPT_SPECIFY_HANDLER
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#define M68K_INSTRUCTION_HOOK OPT_OFF
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#define M68K_INSTRUCTION_CALLBACK() m68k_instruction()
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void m68k_instruction();
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/* If ON, the CPU will emulate the 4-byte prefetch queue of a real 68000 */
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#define M68K_EMULATE_PREFETCH OPT_OFF
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/* If ON, the CPU will generate address error exceptions if it tries to
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* access a word or longword at an odd address.
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* NOTE: This is only emulated properly for 68000 mode.
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*/
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#define M68K_EMULATE_ADDRESS_ERROR OPT_OFF
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/* Turn ON to enable logging of illegal instruction calls.
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* M68K_LOG_FILEHANDLE must be #defined to a stdio file stream.
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* Turn on M68K_LOG_1010_1111 to log all 1010 and 1111 calls.
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*/
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#define M68K_LOG_ENABLE OPT_OFF
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#define M68K_LOG_1010_1111 OPT_OFF
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#define M68K_LOG_FILEHANDLE stderr
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/* ----------------------------- COMPATIBILITY ---------------------------- */
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/* The following options set optimizations that violate the current ANSI
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* standard, but will be compliant under the forthcoming C9X standard.
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*/
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/* If ON, the enulation core will use 64-bit integers to speed up some
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* operations.
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*/
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#define M68K_USE_64_BIT OPT_OFF
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/* Set to your compiler's static inline keyword to enable it, or
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* set it to blank to disable it.
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* If you define INLINE in the makefile, it will override this value.
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* NOTE: not enabling inline functions will SEVERELY slow down emulation.
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*/
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#ifndef INLINE
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#define INLINE static __inline__
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#endif /* INLINE */
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#endif /* M68K_COMPILE_FOR_MAME */
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/* ======================================================================== */
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/* ============================== END OF FILE ============================= */
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/* ======================================================================== */
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#include <byteswap.h>
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#include <stdint.h>
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extern unsigned char *m68k_pcbase;
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static inline unsigned int m68k_read_immediate_16(unsigned int address) {
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address&=0xFFFFFF;
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uint16_t *p=(uint16_t*)(m68k_pcbase+address);
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return __bswap_16(*p);
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}
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static inline unsigned int m68k_read_immediate_32(unsigned int address) {
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address&=0xFFFFFF;
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uint32_t *p=(uint32_t*)(m68k_pcbase+address);
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return __bswap_32(*p);
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}
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static inline unsigned int m68k_read_pcrelative_8(unsigned int address) {
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address&=0xFFFFFF;
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uint8_t *p=(uint8_t*)(m68k_pcbase+address);
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return *p;
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}
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static inline unsigned int m68k_read_pcrelative_16(unsigned int address) {
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address&=0xFFFFFF;
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uint16_t *p=(uint16_t*)(m68k_pcbase+address);
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return __bswap_16(*p);
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}
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static inline unsigned int m68k_read_pcrelative_32(unsigned int address) {
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address&=0xFFFFFF;
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uint32_t *p=(uint32_t*)(m68k_pcbase+address);
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return __bswap_32(*p);
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}
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#endif /* M68KCONF__HEADER */
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