1 // SPDX-License-Identifier: MIT
5 #include "platforms/platforms.h"
6 #include "input/input.h"
9 #include "platforms/amiga/Gayle.h"
10 #include "platforms/amiga/amiga-registers.h"
11 #include "platforms/amiga/rtg/rtg.h"
12 #include "platforms/amiga/hunk-reloc.h"
13 #include "platforms/amiga/piscsi/piscsi.h"
14 #include "platforms/amiga/piscsi/piscsi-enums.h"
15 #include "platforms/amiga/net/pi-net.h"
16 #include "platforms/amiga/net/pi-net-enums.h"
17 #include "platforms/amiga/pistorm-dev/pistorm-dev.h"
18 #include "platforms/amiga/pistorm-dev/pistorm-dev-enums.h"
19 #include "gpio/ps_protocol.h"
33 #include <sys/ioctl.h>
36 #include <sys/types.h>
39 #define KEY_POLL_INTERVAL_MSEC 5000
41 int kb_hook_enabled = 0;
42 int mouse_hook_enabled = 0;
43 int cpu_emulation_running = 1;
45 uint8_t mouse_dx = 0, mouse_dy = 0;
46 uint8_t mouse_buttons = 0;
47 uint8_t mouse_extra = 0;
49 extern uint8_t gayle_int;
50 extern uint8_t gayle_ide_enabled;
51 extern uint8_t gayle_emulation_enabled;
52 extern uint8_t gayle_a4k_int;
53 extern volatile unsigned int *gpio;
54 extern volatile uint16_t srdata;
55 extern uint8_t realtime_graphics_debug, emulator_exiting;
56 extern uint8_t rtg_on;
57 uint8_t realtime_disassembly, int2_enabled = 0;
58 uint32_t do_disasm = 0, old_level;
59 uint32_t last_irq = 8, last_last_irq = 8;
61 uint8_t end_signal = 0, load_new_config = 0;
63 char disasm_buf[4096];
65 #define KICKBASE 0xF80000
66 #define KICKSIZE 0x7FFFF
68 int mem_fd, mouse_fd = -1, keyboard_fd = -1;
77 extern m68ki_cpu_core m68ki_cpu;
78 extern int m68ki_initial_cycles;
79 extern int m68ki_remaining_cycles;
81 #define M68K_SET_IRQ(i) old_level = CPU_INT_LEVEL; \
82 CPU_INT_LEVEL = (i << 8); \
83 if(old_level != 0x0700 && CPU_INT_LEVEL == 0x0700) \
84 m68ki_cpu.nmi_pending = TRUE;
85 #define M68K_END_TIMESLICE m68ki_initial_cycles = GET_CYCLES(); \
88 #define M68K_SET_IRQ m68k_set_irq
89 #define M68K_END_TIMESLICE m68k_end_timeslice()
92 #define NOP asm("nop"); asm("nop"); asm("nop"); asm("nop");
93 #define MEMORY_BARRIER() __sync_synchronize()
95 #define DEBUG_EMULATOR
102 // Configurable emulator options
103 unsigned int cpu_type = M68K_CPU_TYPE_68000;
104 unsigned int loop_cycles = 300, irq_status = 0;
105 struct emulator_config *cfg = NULL;
106 char keyboard_file[256] = "/dev/input/event1";
108 const uint16_t irq_delay = 0;
117 volatile struct DoReset do_reset = {0};
119 void *ipl_task(void *args) {
120 printf("IPL thread running\n");
121 uint16_t old_irq = 0;
123 unsigned int amiga_reset=0, amiga_reset_last=0;
126 value = *(gpio + 13);
127 if (value & (1 << PIN_TXN_IN_PROGRESS))
130 if (!(value & (1 << PIN_IPL_ZERO))) {
150 if(do_reset.value==0)
152 amiga_reset=(value & (1 << PIN_RESET));
153 if(amiga_reset!=amiga_reset_last)
155 amiga_reset_last=amiga_reset;
158 printf("Amiga Reset is down...\n");
165 printf("Amiga Reset is up...\n");
170 /*if (gayle_ide_enabled) {
171 if (((gayle_int & 0x80) || gayle_a4k_int) && (get_ide(0)->drive[0].intrq || get_ide(0)->drive[1].intrq)) {
172 //get_ide(0)->drive[0].intrq = 0;
181 NOP NOP NOP NOP NOP NOP NOP NOP
182 //NOP NOP NOP NOP NOP NOP NOP NOP
183 //NOP NOP NOP NOP NOP NOP NOP NOP
184 /*NOP NOP NOP NOP NOP NOP NOP NOP
185 NOP NOP NOP NOP NOP NOP NOP NOP
186 NOP NOP NOP NOP NOP NOP NOP NOP*/
191 static inline unsigned int inline_read_status_reg() {
192 *(gpio + 7) = (REG_STATUS << PIN_A0);
193 *(gpio + 7) = 1 << PIN_RD;
194 *(gpio + 7) = 1 << PIN_RD;
195 *(gpio + 7) = 1 << PIN_RD;
196 *(gpio + 7) = 1 << PIN_RD;
198 unsigned int value = *(gpio + 13);
200 *(gpio + 10) = 0xffffec;
202 return (value >> 8) & 0xffff;
206 m68ki_cpu_core *state = &m68ki_cpu;
207 m68k_pulse_reset(state);
210 if (mouse_hook_enabled) {
211 get_mouse_status(&mouse_dx, &mouse_dy, &mouse_buttons, &mouse_extra);
214 if (realtime_disassembly && (do_disasm || cpu_emulation_running)) {
215 m68k_disassemble(disasm_buf, m68k_get_reg(NULL, M68K_REG_PC), cpu_type);
216 printf("REGA: 0:$%.8X 1:$%.8X 2:$%.8X 3:$%.8X 4:$%.8X 5:$%.8X 6:$%.8X 7:$%.8X\n", m68k_get_reg(NULL, M68K_REG_A0), m68k_get_reg(NULL, M68K_REG_A1), m68k_get_reg(NULL, M68K_REG_A2), m68k_get_reg(NULL, M68K_REG_A3), \
217 m68k_get_reg(NULL, M68K_REG_A4), m68k_get_reg(NULL, M68K_REG_A5), m68k_get_reg(NULL, M68K_REG_A6), m68k_get_reg(NULL, M68K_REG_A7));
218 printf("REGD: 0:$%.8X 1:$%.8X 2:$%.8X 3:$%.8X 4:$%.8X 5:$%.8X 6:$%.8X 7:$%.8X\n", m68k_get_reg(NULL, M68K_REG_D0), m68k_get_reg(NULL, M68K_REG_D1), m68k_get_reg(NULL, M68K_REG_D2), m68k_get_reg(NULL, M68K_REG_D3), \
219 m68k_get_reg(NULL, M68K_REG_D4), m68k_get_reg(NULL, M68K_REG_D5), m68k_get_reg(NULL, M68K_REG_D6), m68k_get_reg(NULL, M68K_REG_D7));
220 printf("%.8X (%.8X)]] %s\n", m68k_get_reg(NULL, M68K_REG_PC), (m68k_get_reg(NULL, M68K_REG_PC) & 0xFFFFFF), disasm_buf);
223 m68k_execute(state, 1);
226 if (cpu_emulation_running) {
229 m68k_execute(state, 5);
231 m68k_execute(state, loop_cycles);
237 last_irq = ((inline_read_status_reg() & 0xe000) >> 13);
238 if (last_irq != 0 && last_irq != last_last_irq) {
239 last_last_irq = last_irq;
240 M68K_SET_IRQ(last_irq);
242 m68k_execute(state, 50);
247 if (!irq && last_last_irq != 0) {
253 if (do_reset.value) {
256 usleep(1000000); // 1sec
258 // while(amiga_reset==0);
259 // printf("CPU emulation reset.\n");
262 if (mouse_hook_enabled && (mouse_extra != 0x00)) {
263 // mouse wheel events have occurred; unlike l/m/r buttons, these are queued as keypresses, so add to end of buffer
264 switch (mouse_extra) {
267 queue_keypress(0xfe, KEYPRESS_PRESS, PLATFORM_AMIGA);
271 queue_keypress(0xff, KEYPRESS_PRESS, PLATFORM_AMIGA);
275 // dampen the scroll wheel until next while loop iteration
279 if (load_new_config) {
280 printf("[CPU] Loading new config file.\n");
281 goto stop_cpu_emulation;
285 goto stop_cpu_emulation;
290 printf("[CPU] End of CPU thread\n");
294 void *keyboard_task() {
295 struct pollfd kbdpoll[1];
297 char c = 0, c_code = 0, c_type = 0;
298 char grab_message[] = "[KBD] Grabbing keyboard from input layer\n",
299 ungrab_message[] = "[KBD] Ungrabbing keyboard\n";
301 printf("[KBD] Keyboard thread started\n");
303 // because we permit the keyboard to be grabbed on startup, quickly check if we need to grab it
304 if (kb_hook_enabled && cfg->keyboard_grab) {
305 printf(grab_message);
306 grab_device(keyboard_fd);
309 kbdpoll[0].fd = keyboard_fd;
310 kbdpoll[0].events = POLLIN;
313 kpollrc = poll(kbdpoll, 1, KEY_POLL_INTERVAL_MSEC);
314 if ((kpollrc > 0) && (kbdpoll[0].revents & POLLHUP)) {
315 // in the event that a keyboard is unplugged, keyboard_task will whiz up to 100% utilisation
316 // this is undesired, so if the keyboard HUPs, end the thread without ending the emulation
317 printf("[KBD] Keyboard node returned HUP (unplugged?)\n");
321 // if kpollrc > 0 then it contains number of events to pull, also check if POLLIN is set in revents
322 if ((kpollrc <= 0) || !(kbdpoll[0].revents & POLLIN)) {
326 while (get_key_char(&c, &c_code, &c_type)) {
327 if (c && c == cfg->keyboard_toggle_key && !kb_hook_enabled) {
329 printf("[KBD] Keyboard hook enabled.\n");
330 if (cfg->keyboard_grab) {
331 grab_device(keyboard_fd);
332 printf(grab_message);
334 } else if (kb_hook_enabled) {
335 if (c == 0x1B && c_type) {
337 printf("[KBD] Keyboard hook disabled.\n");
338 if (cfg->keyboard_grab) {
339 release_device(keyboard_fd);
340 printf(ungrab_message);
343 if (queue_keypress(c_code, c_type, cfg->platform->id) && int2_enabled && last_irq != 2) {
350 // pause pressed; trigger nmi (int level 7)
351 if (c == 0x01 && c_type) {
352 printf("[INT] Sending NMI\n");
356 if (!kb_hook_enabled && c_type) {
357 if (c && c == cfg->mouse_toggle_key) {
358 mouse_hook_enabled ^= 1;
359 printf("Mouse hook %s.\n", mouse_hook_enabled ? "enabled" : "disabled");
360 mouse_dx = mouse_dy = mouse_buttons = mouse_extra = 0;
363 cpu_emulation_running ^= 1;
364 printf("CPU emulation is now %s\n", cpu_emulation_running ? "running" : "stopped");
367 realtime_graphics_debug ^= 1;
368 printf("Real time graphics debug is now %s\n", realtime_graphics_debug ? "on" : "off");
372 //m68k_pulse_reset();
373 printf("CPU emulation reset.\n");
376 printf("Quitting and exiting emulator.\n");
381 realtime_disassembly ^= 1;
383 printf("Real time disassembly is now %s\n", realtime_disassembly ? "on" : "off");
386 int r = get_mapped_item_by_address(cfg, 0x08000000);
388 printf("Dumping first 16MB of mapped range %d.\n", r);
389 FILE *dmp = fopen("./memdmp.bin", "wb+");
390 fwrite(cfg->map_data[r], 16 * SIZE_MEGA, 1, dmp);
394 if (c == 's' && realtime_disassembly) {
397 if (c == 'S' && realtime_disassembly) {
406 printf("[KBD] Keyboard thread ending\n");
407 if (cfg->keyboard_grab) {
408 printf(ungrab_message);
409 release_device(keyboard_fd);
414 void stop_cpu_emulation(uint8_t disasm_cur) {
417 m68k_disassemble(disasm_buf, m68k_get_reg(NULL, M68K_REG_PC), cpu_type);
418 printf("REGA: 0:$%.8X 1:$%.8X 2:$%.8X 3:$%.8X 4:$%.8X 5:$%.8X 6:$%.8X 7:$%.8X\n", m68k_get_reg(NULL, M68K_REG_A0), m68k_get_reg(NULL, M68K_REG_A1), m68k_get_reg(NULL, M68K_REG_A2), m68k_get_reg(NULL, M68K_REG_A3), \
419 m68k_get_reg(NULL, M68K_REG_A4), m68k_get_reg(NULL, M68K_REG_A5), m68k_get_reg(NULL, M68K_REG_A6), m68k_get_reg(NULL, M68K_REG_A7));
420 printf("REGD: 0:$%.8X 1:$%.8X 2:$%.8X 3:$%.8X 4:$%.8X 5:$%.8X 6:$%.8X 7:$%.8X\n", m68k_get_reg(NULL, M68K_REG_D0), m68k_get_reg(NULL, M68K_REG_D1), m68k_get_reg(NULL, M68K_REG_D2), m68k_get_reg(NULL, M68K_REG_D3), \
421 m68k_get_reg(NULL, M68K_REG_D4), m68k_get_reg(NULL, M68K_REG_D5), m68k_get_reg(NULL, M68K_REG_D6), m68k_get_reg(NULL, M68K_REG_D7));
422 printf("%.8X (%.8X)]] %s\n", m68k_get_reg(NULL, M68K_REG_PC), (m68k_get_reg(NULL, M68K_REG_PC) & 0xFFFFFF), disasm_buf);
423 realtime_disassembly = 1;
426 cpu_emulation_running = 0;
431 static volatile unsigned char maprom;
433 void sigint_handler(int sig_num) {
435 //cpu_emulation_running = 0;
438 printf("Received sigint %d, exiting.\n", sig_num);
444 if (cfg->platform->shutdown) {
445 cfg->platform->shutdown(cfg);
448 while (!emulator_exiting) {
449 emulator_exiting = 1;
457 int main(int argc, char *argv[]) {
462 //const struct sched_param priority = {99};
464 // Some command line switch stuffles
465 for (g = 1; g < argc; g++) {
466 if (strcmp(argv[g], "--cpu_type") == 0 || strcmp(argv[g], "--cpu") == 0) {
468 printf("%s switch found, but no CPU type specified.\n", argv[g]);
471 cpu_type = get_m68k_cpu_type(argv[g]);
474 else if (strcmp(argv[g], "--config-file") == 0 || strcmp(argv[g], "--config") == 0) {
476 printf("%s switch found, but no config filename specified.\n", argv[g]);
479 FILE *chk = fopen(argv[g], "rb");
481 printf("Config file %s does not exist, please check that you've specified the path correctly.\n", argv[g]);
485 set_pistorm_devcfg_filename(argv[g]);
489 else if (strcmp(argv[g], "--keyboard-file") == 0 || strcmp(argv[g], "--kbfile") == 0) {
491 printf("%s switch found, but no keyboard device path specified.\n", argv[g]);
494 strcpy(keyboard_file, argv[g]);
502 ps_reset_state_machine();
506 if (load_new_config != 0) {
507 uint8_t config_action = load_new_config - 1;
510 free_config_file(cfg);
515 switch(config_action) {
518 cfg = load_config_file(get_pistorm_devcfg_filename());
521 cfg = load_config_file("default.cfg");
527 printf("No config file specified. Trying to load default.cfg...\n");
528 cfg = load_config_file("default.cfg");
530 printf("Couldn't load default.cfg, empty emulator config will be used.\n");
531 cfg = (struct emulator_config *)calloc(1, sizeof(struct emulator_config));
533 printf("Failed to allocate memory for emulator config!\n");
536 memset(cfg, 0x00, sizeof(struct emulator_config));
541 if (cfg->cpu_type) cpu_type = cfg->cpu_type;
542 if (cfg->loop_cycles) loop_cycles = cfg->loop_cycles;
545 cfg->platform = make_platform_config("none", "generic");
546 cfg->platform->platform_initial_setup(cfg);
549 if (cfg->mouse_enabled) {
550 mouse_fd = open(cfg->mouse_file, O_RDWR | O_NONBLOCK);
551 if (mouse_fd == -1) {
552 printf("Failed to open %s, can't enable mouse hook.\n", cfg->mouse_file);
553 cfg->mouse_enabled = 0;
556 * *-*-*-* magic numbers! *-*-*-*
557 * great, so waaaay back in the history of the pc, the ps/2 protocol set the standard for mice
558 * and in the process, the mouse sample rate was defined as a way of putting mice into vendor-specific modes.
559 * as the ancient gpm command explains, almost everything except incredibly old mice talk the IntelliMouse
560 * protocol, which reports four bytes. by default, every mouse starts in 3-byte mode (don't report wheel or
561 * additional buttons) until imps2 magic is sent. so, command $f3 is "set sample rate", followed by a byte.
563 uint8_t mouse_init[] = { 0xf4, 0xf3, 0x64 }; // enable, then set sample rate 100
564 uint8_t imps2_init[] = { 0xf3, 0xc8, 0xf3, 0x64, 0xf3, 0x50 }; // magic sequence; set sample 200, 100, 80
565 if (write(mouse_fd, mouse_init, sizeof(mouse_init)) != -1) {
566 if (write(mouse_fd, imps2_init, sizeof(imps2_init)) == -1)
567 printf("[MOUSE] Couldn't enable scroll wheel events; is this mouse from the 1980s?\n");
569 printf("[MOUSE] Mouse didn't respond to normal PS/2 init; have you plugged a brick in by mistake?\n");
573 if (cfg->keyboard_file)
574 keyboard_fd = open(cfg->keyboard_file, O_RDONLY | O_NONBLOCK);
576 keyboard_fd = open(keyboard_file, O_RDONLY | O_NONBLOCK);
578 if (keyboard_fd == -1) {
579 printf("Failed to open keyboard event source.\n");
582 if (cfg->mouse_autoconnect)
583 mouse_hook_enabled = 1;
585 if (cfg->keyboard_autoconnect)
590 signal(SIGINT, sigint_handler);
592 ps_reset_state_machine();
597 printf("Setting CPU type to %d.\n", cpu_type);
598 m68k_set_cpu_type(&m68ki_cpu, cpu_type);
601 pthread_t ipl_tid = 0, cpu_tid, kbd_tid;
604 err = pthread_create(&ipl_tid, NULL, &ipl_task, NULL);
606 printf("[ERROR] Cannot create IPL thread: [%s]", strerror(err));
608 pthread_setname_np(ipl_tid, "pistorm: ipl");
609 printf("IPL thread created successfully\n");
613 // create keyboard task
614 err = pthread_create(&kbd_tid, NULL, &keyboard_task, NULL);
616 printf("[ERROR] Cannot create keyboard thread: [%s]", strerror(err));
618 pthread_setname_np(kbd_tid, "pistorm: kbd");
619 printf("[MAIN] Keyboard thread created successfully\n");
623 err = pthread_create(&cpu_tid, NULL, &cpu_task, NULL);
625 printf("[ERROR] Cannot create CPU thread: [%s]", strerror(err));
627 pthread_setname_np(cpu_tid, "pistorm: cpu");
628 printf("[MAIN] CPU thread created successfully\n");
631 // wait for cpu task to end before closing up and finishing
632 pthread_join(cpu_tid, NULL);
634 while (!emulator_exiting) {
635 emulator_exiting = 1;
639 if (load_new_config == 0)
640 printf("[MAIN] All threads appear to have concluded; ending process\n");
647 if (load_new_config != 0)
650 if (cfg->platform->shutdown) {
651 cfg->platform->shutdown(cfg);
657 void cpu_pulse_reset(void) {
658 m68ki_cpu_core *state = &m68ki_cpu;
662 if (cfg->platform->handle_reset)
663 cfg->platform->handle_reset(cfg);
665 m68k_pulse_reset(state);
668 int cpu_irq_ack(int level) {
669 printf("cpu irq ack\n");
673 static unsigned int target = 0;
674 static uint8_t send_keypress = 0;
675 static uint32_t platform_res, rres;
677 uint8_t cdtv_dmac_reg_idx_read();
678 void cdtv_dmac_reg_idx_write(uint8_t value);
679 uint32_t cdtv_dmac_read(uint32_t address, uint8_t type);
680 void cdtv_dmac_write(uint32_t address, uint32_t value, uint8_t type);
682 unsigned int garbage = 0;
684 static inline void inline_write_16(unsigned int address, unsigned int data) {
685 *(gpio + 0) = GPFSEL0_OUTPUT;
686 *(gpio + 1) = GPFSEL1_OUTPUT;
687 *(gpio + 2) = GPFSEL2_OUTPUT;
689 *(gpio + 7) = ((data & 0xffff) << 8) | (REG_DATA << PIN_A0);
690 *(gpio + 7) = 1 << PIN_WR;
691 *(gpio + 10) = 1 << PIN_WR;
692 *(gpio + 10) = 0xffffec;
694 *(gpio + 7) = ((address & 0xffff) << 8) | (REG_ADDR_LO << PIN_A0);
695 *(gpio + 7) = 1 << PIN_WR;
696 *(gpio + 10) = 1 << PIN_WR;
697 *(gpio + 10) = 0xffffec;
699 *(gpio + 7) = ((0x0000 | (address >> 16)) << 8) | (REG_ADDR_HI << PIN_A0);
700 *(gpio + 7) = 1 << PIN_WR;
701 *(gpio + 10) = 1 << PIN_WR;
702 *(gpio + 10) = 0xffffec;
704 *(gpio + 0) = GPFSEL0_INPUT;
705 *(gpio + 1) = GPFSEL1_INPUT;
706 *(gpio + 2) = GPFSEL2_INPUT;
708 while (*(gpio + 13) & (1 << PIN_TXN_IN_PROGRESS)) {}
709 NOP NOP NOP NOP NOP NOP NOP NOP NOP NOP NOP NOP
712 static inline void inline_write_8(unsigned int address, unsigned int data) {
713 if ((address & 1) == 0)
714 data = data + (data << 8); // EVEN, A0=0,UDS
716 data = data & 0xff; // ODD , A0=1,LDS
718 *(gpio + 0) = GPFSEL0_OUTPUT;
719 *(gpio + 1) = GPFSEL1_OUTPUT;
720 *(gpio + 2) = GPFSEL2_OUTPUT;
722 *(gpio + 7) = ((data & 0xffff) << 8) | (REG_DATA << PIN_A0);
723 *(gpio + 7) = 1 << PIN_WR;
724 *(gpio + 10) = 1 << PIN_WR;
725 *(gpio + 10) = 0xffffec;
727 *(gpio + 7) = ((address & 0xffff) << 8) | (REG_ADDR_LO << PIN_A0);
728 *(gpio + 7) = 1 << PIN_WR;
729 *(gpio + 10) = 1 << PIN_WR;
730 *(gpio + 10) = 0xffffec;
732 *(gpio + 7) = ((0x0100 | (address >> 16)) << 8) | (REG_ADDR_HI << PIN_A0);
733 *(gpio + 7) = 1 << PIN_WR;
734 *(gpio + 10) = 1 << PIN_WR;
735 *(gpio + 10) = 0xffffec;
737 *(gpio + 0) = GPFSEL0_INPUT;
738 *(gpio + 1) = GPFSEL1_INPUT;
739 *(gpio + 2) = GPFSEL2_INPUT;
741 while (*(gpio + 13) & (1 << PIN_TXN_IN_PROGRESS)) {}
742 NOP NOP NOP NOP NOP NOP NOP NOP NOP NOP NOP NOP
745 static inline void inline_write_32(unsigned int address, unsigned int value) {
746 inline_write_16(address, value >> 16);
747 inline_write_16(address + 2, value);
750 static inline unsigned int inline_read_16(unsigned int address) {
751 *(gpio + 0) = GPFSEL0_OUTPUT;
752 *(gpio + 1) = GPFSEL1_OUTPUT;
753 *(gpio + 2) = GPFSEL2_OUTPUT;
755 *(gpio + 7) = ((address & 0xffff) << 8) | (REG_ADDR_LO << PIN_A0);
756 *(gpio + 7) = 1 << PIN_WR;
757 *(gpio + 10) = 1 << PIN_WR;
758 *(gpio + 10) = 0xffffec;
760 *(gpio + 7) = ((0x0200 | (address >> 16)) << 8) | (REG_ADDR_HI << PIN_A0);
761 *(gpio + 7) = 1 << PIN_WR;
762 *(gpio + 10) = 1 << PIN_WR;
763 *(gpio + 10) = 0xffffec;
765 *(gpio + 0) = GPFSEL0_INPUT;
766 *(gpio + 1) = GPFSEL1_INPUT;
767 *(gpio + 2) = GPFSEL2_INPUT;
769 *(gpio + 7) = (REG_DATA << PIN_A0);
770 *(gpio + 7) = 1 << PIN_RD;
772 while (*(gpio + 13) & (1 << PIN_TXN_IN_PROGRESS)) {}
773 unsigned int value = *(gpio + 13);
775 *(gpio + 10) = 0xffffec;
777 return (value >> 8) & 0xffff;
780 static inline unsigned int inline_read_8(unsigned int address) {
781 *(gpio + 0) = GPFSEL0_OUTPUT;
782 *(gpio + 1) = GPFSEL1_OUTPUT;
783 *(gpio + 2) = GPFSEL2_OUTPUT;
785 *(gpio + 7) = ((address & 0xffff) << 8) | (REG_ADDR_LO << PIN_A0);
786 *(gpio + 7) = 1 << PIN_WR;
787 *(gpio + 10) = 1 << PIN_WR;
788 *(gpio + 10) = 0xffffec;
790 *(gpio + 7) = ((0x0300 | (address >> 16)) << 8) | (REG_ADDR_HI << PIN_A0);
791 *(gpio + 7) = 1 << PIN_WR;
792 *(gpio + 10) = 1 << PIN_WR;
793 *(gpio + 10) = 0xffffec;
795 *(gpio + 0) = GPFSEL0_INPUT;
796 *(gpio + 1) = GPFSEL1_INPUT;
797 *(gpio + 2) = GPFSEL2_INPUT;
799 *(gpio + 7) = (REG_DATA << PIN_A0);
800 *(gpio + 7) = 1 << PIN_RD;
802 while (*(gpio + 13) & (1 << PIN_TXN_IN_PROGRESS)) {}
803 unsigned int value = *(gpio + 13);
805 *(gpio + 10) = 0xffffec;
807 value = (value >> 8) & 0xffff;
809 if ((address & 1) == 0)
810 return (value >> 8) & 0xff; // EVEN, A0=0,UDS
812 return value & 0xff; // ODD , A0=1,LDS
815 static inline unsigned int inline_read_32(unsigned int address) {
816 unsigned int a = inline_read_16(address);
817 unsigned int b = inline_read_16(address + 2);
818 return (a << 16) | b;
821 static inline uint32_t ps_read(uint8_t type, uint32_t addr) {
824 return inline_read_8(addr);
826 return inline_read_16(addr);
827 case OP_TYPE_LONGWORD:
828 return inline_read_32(addr);
830 // This shouldn't actually happen.
834 static inline void ps_write(uint8_t type, uint32_t addr, uint32_t val) {
837 inline_write_8(addr, val);
840 inline_write_16(addr, val);
842 case OP_TYPE_LONGWORD:
843 inline_write_32(addr, val);
846 // This shouldn't actually happen.
850 static inline int32_t platform_read_check(uint8_t type, uint32_t addr, uint32_t *res) {
851 switch (cfg->platform->id) {
855 if (mouse_hook_enabled && (mouse_buttons & 0x01)) {
856 rres = (uint32_t)ps_read(type, addr);
857 *res = (rres ^ 0x40);
863 if (kb_hook_enabled) {
864 rres = (uint32_t)ps_read(type, addr);
865 if (get_num_kb_queued() && (!send_keypress || send_keypress == 1)) {
870 if (send_keypress == 2) {
879 if (kb_hook_enabled) {
880 rres = (uint32_t)ps_read(type, addr);
881 uint8_t c = 0, t = 0;
882 pop_queued_key(&c, &t);
884 rres = ((c << 1) | t) ^ 0xFF;
892 if (mouse_hook_enabled) {
893 unsigned short result = (mouse_dy << 8) | (mouse_dx);
894 *res = (unsigned int)result;
900 if (mouse_hook_enabled) {
901 unsigned short result = (unsigned short)ps_read(type, addr);
902 // bit 1 rmb, bit 2 mmb
903 if (mouse_buttons & 0x06) {
904 *res = (unsigned int)((result ^ ((mouse_buttons & 0x02) << 9)) // move rmb to bit 10
905 & (result ^ ((mouse_buttons & 0x04) << 6))); // move mmb to bit 8
908 *res = (unsigned int)(result & 0xfffd);
917 if (addr >= cfg->custom_low && addr < cfg->custom_high) {
918 if (addr >= PISCSI_OFFSET && addr < PISCSI_UPPER) {
919 *res = handle_piscsi_read(addr, type);
922 if (addr >= PINET_OFFSET && addr < PINET_UPPER) {
923 *res = handle_pinet_read(addr, type);
926 if (addr >= PIGFX_RTG_BASE && addr < PIGFX_UPPER) {
927 *res = rtg_read((addr & 0x0FFFFFFF), type);
930 if (custom_read_amiga(cfg, addr, &target, type) != -1) {
940 if (ovl || (addr >= cfg->mapped_low && addr < cfg->mapped_high)) {
941 if (handle_mapped_read(cfg, addr, &target, type) != -1) {
950 unsigned int m68k_read_memory_8(unsigned int address) {
951 if (platform_read_check(OP_TYPE_BYTE, address, &platform_res)) {
955 if (address & 0xFF000000)
958 return (unsigned int)inline_read_8((uint32_t)address);
961 unsigned int m68k_read_memory_16(unsigned int address) {
962 if (platform_read_check(OP_TYPE_WORD, address, &platform_res)) {
966 if (address & 0xFF000000)
969 if (address & 0x01) {
970 return ((inline_read_8(address) << 8) | inline_read_8(address + 1));
972 return (unsigned int)inline_read_16((uint32_t)address);
975 unsigned int m68k_read_memory_32(unsigned int address) {
976 if (platform_read_check(OP_TYPE_LONGWORD, address, &platform_res)) {
980 if (address & 0xFF000000)
983 if (address & 0x01) {
984 uint32_t c = inline_read_8(address);
985 c |= (be16toh(inline_read_16(address+1)) << 8);
986 c |= (inline_read_8(address + 3) << 24);
989 uint16_t a = inline_read_16(address);
990 uint16_t b = inline_read_16(address + 2);
991 return (a << 16) | b;
994 static inline int32_t platform_write_check(uint8_t type, uint32_t addr, uint32_t val) {
995 switch (cfg->platform->id) {
998 case 0xEFFFFE: // VIA1?
999 if (val & 0x10 && !ovl) {
1001 printf("[MAC] OVL on.\n");
1002 handle_ovl_mappings_mac68k(cfg);
1005 printf("[MAC] OVL off.\n");
1006 handle_ovl_mappings_mac68k(cfg);
1011 case PLATFORM_AMIGA:
1014 if (ovl != (val & (1 << 0))) {
1015 ovl = (val & (1 << 0));
1016 printf("OVL:%x\n", ovl);
1021 char *serdat = (char *)&val;
1022 // SERDAT word. see amiga dev docs appendix a; upper byte is control codes, and bit 0 is always 1.
1023 // ignore this upper byte as it's not viewable data, only display lower byte.
1024 printf("%c", serdat[0]);
1029 // This code is kind of strange and should probably be reworked/revoked.
1030 if (!(val & 0x8000)) {
1035 else if (val & 0x04) {
1044 if (addr >= cfg->custom_low && addr < cfg->custom_high) {
1045 if (addr >= PISCSI_OFFSET && addr < PISCSI_UPPER) {
1046 handle_piscsi_write(addr, val, type);
1049 if (addr >= PINET_OFFSET && addr < PINET_UPPER) {
1050 handle_pinet_write(addr, val, type);
1053 if (addr >= PIGFX_RTG_BASE && addr < PIGFX_UPPER) {
1054 rtg_write((addr & 0x0FFFFFFF), val, type);
1057 if (custom_write_amiga(cfg, addr, val, type) != -1) {
1066 if (ovl || (addr >= cfg->mapped_low && addr < cfg->mapped_high)) {
1067 if (handle_mapped_write(cfg, addr, val, type) != -1) {
1075 void m68k_write_memory_8(unsigned int address, unsigned int value) {
1076 if (platform_write_check(OP_TYPE_BYTE, address, value))
1079 if (address & 0xFF000000)
1082 inline_write_8((uint32_t)address, value);
1086 void m68k_write_memory_16(unsigned int address, unsigned int value) {
1087 if (platform_write_check(OP_TYPE_WORD, address, value))
1090 if (address & 0xFF000000)
1093 if (address & 0x01) {
1094 inline_write_8(value & 0xFF, address);
1095 inline_write_8((value >> 8) & 0xFF, address + 1);
1099 inline_write_16((uint32_t)address, value);
1103 void m68k_write_memory_32(unsigned int address, unsigned int value) {
1104 if (platform_write_check(OP_TYPE_LONGWORD, address, value))
1107 if (address & 0xFF000000)
1110 if (address & 0x01) {
1111 inline_write_8(value & 0xFF, address);
1112 inline_write_16(htobe16(((value >> 8) & 0xFFFF)), address + 1);
1113 inline_write_8((value >> 24), address + 3);
1117 inline_write_16(address, value >> 16);
1118 inline_write_16(address + 2, value);