14 #include <sys/types.h>
16 #include <sys/ioctl.h>
21 #include "platforms/platforms.h"
22 #include "input/input.h"
24 #include "platforms/amiga/amiga-registers.h"
26 //#define BCM2708_PERI_BASE 0x20000000 //pi0-1
27 //#define BCM2708_PERI_BASE 0xFE000000 //pi4
28 #define BCM2708_PERI_BASE 0x3F000000 // pi3
29 #define BCM2708_PERI_SIZE 0x01000000
30 #define GPIO_BASE (BCM2708_PERI_BASE + 0x200000) /* GPIO controller */
31 #define GPCLK_BASE (BCM2708_PERI_BASE + 0x101000)
32 #define GPIO_ADDR 0x200000 /* GPIO controller */
33 #define GPCLK_ADDR 0x101000
34 #define CLK_PASSWD 0x5a000000
35 #define CLK_GP0_CTL 0x070
36 #define CLK_GP0_DIV 0x074
42 #define STATUSREGADDR \
43 GPIO_CLR = 1 << SA0; \
44 GPIO_CLR = 1 << SA1; \
47 GPIO_CLR = 1 << SA0; \
48 GPIO_CLR = 1 << SA1; \
51 GPIO_SET = 1 << SA0; \
52 GPIO_CLR = 1 << SA1; \
55 GPIO_CLR = 1 << SA0; \
56 GPIO_SET = 1 << SA1; \
59 GPIO_SET = 1 << SA0; \
60 GPIO_SET = 1 << SA1; \
63 #define PAGE_SIZE (4 * 1024)
64 #define BLOCK_SIZE (4 * 1024)
66 #define GPIOSET(no, ishigh) \
71 reset |= (1 << (no)); \
74 #define JOY0DAT 0xDFF00A
75 #define JOY1DAT 0xDFF00C
76 #define CIAAPRA 0xBFE001
77 #define POTGOR 0xDFF016
79 int kb_hook_enabled = 0;
80 int mouse_hook_enabled = 0;
81 int cpu_emulation_running = 1;
83 char mouse_dx = 0, mouse_dy = 0;
84 char mouse_buttons = 0;
86 #define KICKBASE 0xF80000
87 #define KICKSIZE 0x7FFFF
89 int mem_fd, mouse_fd = -1, keyboard_fd = -1;
91 int gayle_emulation_enabled = 1;
95 // Configurable emulator options
96 unsigned int cpu_type = M68K_CPU_TYPE_68000;
97 unsigned int loop_cycles = 300;
98 struct emulator_config *cfg = NULL;
99 char keyboard_file[256] = "/dev/input/event0";
102 volatile unsigned int *gpio;
103 volatile unsigned int *gpclk;
104 volatile unsigned int gpfsel0;
105 volatile unsigned int gpfsel1;
106 volatile unsigned int gpfsel2;
107 volatile unsigned int gpfsel0_o;
108 volatile unsigned int gpfsel1_o;
109 volatile unsigned int gpfsel2_o;
111 // GPIO setup macros. Always use INP_GPIO(x) before using OUT_GPIO(x) or
113 #define INP_GPIO(g) *(gpio + ((g) / 10)) &= ~(7 << (((g) % 10) * 3))
114 #define OUT_GPIO(g) *(gpio + ((g) / 10)) |= (1 << (((g) % 10) * 3))
115 #define SET_GPIO_ALT(g, a) \
116 *(gpio + (((g) / 10))) |= \
117 (((a) <= 3 ? (a) + 4 : (a) == 4 ? 3 : 2) << (((g) % 10) * 3))
120 *(gpio + 7) // sets bits which are 1 ignores bits which are 0
122 *(gpio + 10) // clears bits which are 1 ignores bits which are 0
124 #define GET_GPIO(g) (*(gpio + 13) & (1 << g)) // 0 if LOW, (1<<g) if HIGH
126 #define GPIO_PULL *(gpio + 37) // Pull up/pull down
127 #define GPIO_PULLCLK0 *(gpio + 38) // Pull up/pull down clock
131 uint32_t read8(uint32_t address);
132 void write8(uint32_t address, uint32_t data);
134 uint32_t read16(uint32_t address);
135 void write16(uint32_t address, uint32_t data);
137 void write32(uint32_t address, uint32_t data);
138 uint32_t read32(uint32_t address);
140 uint16_t read_reg(void);
141 void write_reg(unsigned int value);
143 volatile uint16_t srdata;
144 volatile uint32_t srdata2;
145 volatile uint32_t srdata2_old;
147 //unsigned char g_kick[524288];
148 //unsigned char g_ram[FASTSIZE + 1]; /* RAM */
149 unsigned char toggle;
151 static volatile unsigned char maprom;
153 void sigint_handler(int sig_num) {
155 //cpu_emulation_running = 0;
158 printf("Received sigint %d, exiting.\n", sig_num);
164 if (cfg->platform->shutdown) {
165 cfg->platform->shutdown(cfg);
171 void *iplThread(void *args) {
172 printf("IPL thread running/n");
176 if (GET_GPIO(1) == 0) {
178 m68k_end_timeslice();
179 //printf("thread!/n");
188 int main(int argc, char *argv[]) {
190 const struct sched_param priority = {99};
192 // Some command line switch stuffles
193 for (g = 1; g < argc; g++) {
194 if (strcmp(argv[g], "--disable-gayle") == 0) {
195 gayle_emulation_enabled = 0;
197 else if (strcmp(argv[g], "--cpu_type") == 0 || strcmp(argv[g], "--cpu") == 0) {
199 printf("%s switch found, but no CPU type specified.\n", argv[g]);
202 cpu_type = get_m68k_cpu_type(argv[g]);
205 else if (strcmp(argv[g], "--config-file") == 0 || strcmp(argv[g], "--config") == 0) {
207 printf("%s switch found, but no config filename specified.\n", argv[g]);
210 cfg = load_config_file(argv[g]);
213 else if (strcmp(argv[g], "--keyboard-file") == 0 || strcmp(argv[g], "--kbfile") == 0) {
215 printf("%s switch found, but no keyboard device path specified.\n", argv[g]);
218 strcpy(keyboard_file, argv[g]);
224 printf("No config file specified. Trying to load default.cfg...\n");
225 cfg = load_config_file("default.cfg");
227 printf("Couldn't load default.cfg, empty emulator config will be used.\n");
228 cfg = (struct emulator_config *)calloc(1, sizeof(struct emulator_config));
230 printf("Failed to allocate memory for emulator config!\n");
233 memset(cfg, 0x00, sizeof(struct emulator_config));
238 if (cfg->cpu_type) cpu_type = cfg->cpu_type;
239 if (cfg->loop_cycles) loop_cycles = cfg->loop_cycles;
242 cfg->platform = make_platform_config("none", "generic");
243 cfg->platform->platform_initial_setup(cfg);
246 if (cfg->mouse_enabled) {
247 mouse_fd = open(cfg->mouse_file, O_RDONLY | O_NONBLOCK);
248 if (mouse_fd == -1) {
249 printf("Failed to open %s, can't enable mouse hook.\n", cfg->mouse_file);
250 cfg->mouse_enabled = 0;
254 keyboard_fd = open(keyboard_file, O_RDONLY | O_NONBLOCK);
255 if (keyboard_fd == -1) {
256 printf("Failed to open keyboard event source.\n");
259 sched_setscheduler(0, SCHED_FIFO, &priority);
260 mlockall(MCL_CURRENT); // lock in memory to keep us from paging out
264 signal(SIGINT, sigint_handler);
267 //goto skip_everything;
269 // Enable 200MHz CLK output on GPIO4, adjust divider and pll source depending
271 printf("Enable 200MHz GPCLK0 on GPIO4\n");
273 *(gpclk + (CLK_GP0_CTL / 4)) = CLK_PASSWD | (1 << 5);
275 while ((*(gpclk + (CLK_GP0_CTL / 4))) & (1 << 7))
278 *(gpclk + (CLK_GP0_DIV / 4)) =
279 CLK_PASSWD | (6 << 12); // divider , 6=200MHz on pi3
281 *(gpclk + (CLK_GP0_CTL / 4)) =
282 CLK_PASSWD | 5 | (1 << 4); // pll? 6=plld, 5=pllc
284 while (((*(gpclk + (CLK_GP0_CTL / 4))) & (1 << 7)) == 0)
288 SET_GPIO_ALT(4, 0); // gpclk0
298 // set gpio0 (aux0) and gpio1 (aux1) to input
302 // Set GPIO pins 6,7 and 8-23 to output
303 for (g = 6; g <= 23; g++) {
307 printf("Precalculate GPIO8-23 as Output\n");
308 gpfsel0_o = *(gpio); // store gpio ddr
309 printf("gpfsel0: %#x\n", gpfsel0_o);
310 gpfsel1_o = *(gpio + 1); // store gpio ddr
311 printf("gpfsel1: %#x\n", gpfsel1_o);
312 gpfsel2_o = *(gpio + 2); // store gpio ddr
313 printf("gpfsel2: %#x\n", gpfsel2_o);
315 // Set GPIO pins 8-23 to input
316 for (g = 8; g <= 23; g++) {
319 printf("Precalculate GPIO8-23 as Input\n");
320 gpfsel0 = *(gpio); // store gpio ddr
321 printf("gpfsel0: %#x\n", gpfsel0);
322 gpfsel1 = *(gpio + 1); // store gpio ddr
323 printf("gpfsel1: %#x\n", gpfsel1);
324 gpfsel2 = *(gpio + 2); // store gpio ddr
325 printf("gpfsel2: %#x\n", gpfsel2);
334 // reset cpld statemachine first
342 // reset amiga and statemachine
346 m68k_write_memory_8(0xbfe201, 0x0001); // AMIGA OVL
347 m68k_write_memory_8(0xbfe001, 0x0001); // AMIGA OVL high (ROM@0x0)
352 printf("Setting CPU type to %d.\n", cpu_type);
353 m68k_set_cpu_type(cpu_type);
357 m68k_set_reg(M68K_REG_PC, 0xF80002);
359 m68k_set_reg(M68K_REG_PC, 0x0);
365 err = pthread_create(&id, NULL, &iplThread, NULL);
367 printf("\ncan't create IPL thread :[%s]", strerror(err));
369 printf("\n IPL Thread created successfully\n");
375 if (mouse_hook_enabled) {
376 if (get_mouse_status(&mouse_dx, &mouse_dy, &mouse_buttons)) {
377 //printf("Maus: %d (%.2X), %d (%.2X), B:%.2X\n", mouse_dx, mouse_dx, mouse_dy, mouse_dy, mouse_buttons);
381 if (cpu_emulation_running)
382 m68k_execute(loop_cycles);
384 // FIXME: Rework this to use keyboard events instead.
385 /*while (get_key_char(&c)) {
386 if (c == cfg->keyboard_toggle_key && !kb_hook_enabled) {
388 printf("Keyboard hook enabled.\n");
390 else if (c == 0x1B && kb_hook_enabled) {
392 printf("Keyboard hook disabled.\n");
394 if (!kb_hook_enabled) {
395 if (c == cfg->mouse_toggle_key) {
396 mouse_hook_enabled ^= 1;
397 printf("Mouse hook %s.\n", mouse_hook_enabled ? "enabled" : "disabled");
398 mouse_dx = mouse_dy = mouse_buttons = 0;
401 cpu_emulation_running ^= 1;
402 printf("CPU emulation is now %s\n", cpu_emulation_running ? "running" : "stopped");
407 printf("CPU emulation reset.\n");
410 printf("Quitting and exiting emulator.\n");
411 goto stop_cpu_emulation;
418 m68k_set_irq((srdata >> 13) & 0xff);
426 if (GET_GPIO(1) == 0) {
428 m68k_set_irq((srdata >> 13) & 0xff);
430 if (CheckIrq() == 1) {
431 write16(0xdff09c, 0x8008);
450 void cpu_pulse_reset(void) {
452 // printf("Status Reg%x\n",read_reg());
455 // printf("Status Reg%x\n",read_reg());
458 int cpu_irq_ack(int level) {
459 printf("cpu irq ack\n");
463 static unsigned int target = 0;
465 #define PLATFORM_CHECK_READ(a) \
466 if (address >= cfg->custom_low && address < cfg->custom_high) { \
467 unsigned int target = 0; \
468 switch(cfg->platform->id) { \
469 case PLATFORM_AMIGA: { \
470 if (custom_read_amiga(cfg, address, &target, a) != -1) { \
479 if (ovl || (address >= cfg->mapped_low && address < cfg->mapped_high)) { \
480 if (handle_mapped_read(cfg, address, &target, a) != -1) \
484 unsigned int m68k_read_memory_8(unsigned int address) {
485 PLATFORM_CHECK_READ(OP_TYPE_BYTE);
488 // if (address < 0xffffff) {
489 return read8((uint32_t)address);
495 unsigned int m68k_read_memory_16(unsigned int address) {
496 PLATFORM_CHECK_READ(OP_TYPE_WORD);
498 if (mouse_hook_enabled) {
499 if (address == JOY0DAT) {
500 // Forward mouse valueses to Amyga.
501 unsigned short result = (mouse_dy << 8) | (mouse_dx);
502 mouse_dx = mouse_dy = 0;
503 return (unsigned int)result;
505 if (address == CIAAPRA) {
506 unsigned short result = (unsigned int)read16((uint32_t)address);
507 if (mouse_buttons & 0x01) {
509 return (unsigned int)(result | 0x40);
512 return (unsigned int)result;
514 if (address == POTGOR) {
515 unsigned short result = (unsigned int)read16((uint32_t)address);
516 if (mouse_buttons & 0x02) {
518 return (unsigned int)(result | 0x2);
521 return (unsigned int)result;
525 // if (address < 0xffffff) {
527 return (unsigned int)read16((uint32_t)address);
533 unsigned int m68k_read_memory_32(unsigned int address) {
534 PLATFORM_CHECK_READ(OP_TYPE_LONGWORD);
536 // if (address < 0xffffff) {
538 uint16_t a = read16(address);
539 uint16_t b = read16(address + 2);
540 return (a << 16) | b;
546 #define PLATFORM_CHECK_WRITE(a) \
547 if (address >= cfg->custom_low && address < cfg->custom_high) { \
548 switch(cfg->platform->id) { \
549 case PLATFORM_AMIGA: { \
550 if (custom_write_amiga(cfg, address, value, a) != -1) { \
559 if (address >= cfg->mapped_low && address < cfg->mapped_high) { \
560 if (handle_mapped_write(cfg, address, value, a) != -1) \
564 void m68k_write_memory_8(unsigned int address, unsigned int value) {
565 PLATFORM_CHECK_WRITE(OP_TYPE_BYTE);
567 if (address == 0xbfe001) {
568 if (ovl != (value & (1 << 0))) {
569 ovl = (value & (1 << 0));
570 printf("OVL:%x\n", ovl);
574 // if (address < 0xffffff) {
576 write8((uint32_t)address, value);
583 void m68k_write_memory_16(unsigned int address, unsigned int value) {
584 PLATFORM_CHECK_WRITE(OP_TYPE_WORD);
586 // if (address < 0xffffff) {
588 write16((uint32_t)address, value);
594 void m68k_write_memory_32(unsigned int address, unsigned int value) {
595 PLATFORM_CHECK_WRITE(OP_TYPE_LONGWORD);
597 // if (address < 0xffffff) {
599 write16(address, value >> 16);
600 write16(address + 2, value);
607 inline void write16(uint32_t address, uint32_t data) {
608 uint32_t addr_h_s = (address & 0x0000ffff) << 8;
609 uint32_t addr_h_r = (~address & 0x0000ffff) << 8;
610 uint32_t addr_l_s = (address >> 16) << 8;
611 uint32_t addr_l_r = (~address >> 16) << 8;
612 uint32_t data_s = (data & 0x0000ffff) << 8;
613 uint32_t data_r = (~data & 0x0000ffff) << 8;
615 // asm volatile ("dmb" ::: "memory");
618 *(gpio + 1) = gpfsel1_o;
619 *(gpio + 2) = gpfsel2_o;
621 *(gpio + 7) = addr_h_s;
622 *(gpio + 10) = addr_h_r;
626 *(gpio + 7) = addr_l_s;
627 *(gpio + 10) = addr_l_r;
632 *(gpio + 7) = data_s;
633 *(gpio + 10) = data_r;
638 *(gpio + 1) = gpfsel1;
639 *(gpio + 2) = gpfsel2;
640 while ((GET_GPIO(0)))
642 // asm volatile ("dmb" ::: "memory");
645 inline void write8(uint32_t address, uint32_t data) {
646 if ((address & 1) == 0)
647 data = data + (data << 8); // EVEN, A0=0,UDS
649 data = data & 0xff; // ODD , A0=1,LDS
650 uint32_t addr_h_s = (address & 0x0000ffff) << 8;
651 uint32_t addr_h_r = (~address & 0x0000ffff) << 8;
652 uint32_t addr_l_s = (address >> 16) << 8;
653 uint32_t addr_l_r = (~address >> 16) << 8;
654 uint32_t data_s = (data & 0x0000ffff) << 8;
655 uint32_t data_r = (~data & 0x0000ffff) << 8;
657 // asm volatile ("dmb" ::: "memory");
660 *(gpio + 1) = gpfsel1_o;
661 *(gpio + 2) = gpfsel2_o;
663 *(gpio + 7) = addr_h_s;
664 *(gpio + 10) = addr_h_r;
668 *(gpio + 7) = addr_l_s;
669 *(gpio + 10) = addr_l_r;
674 *(gpio + 7) = data_s;
675 *(gpio + 10) = data_r;
680 *(gpio + 1) = gpfsel1;
681 *(gpio + 2) = gpfsel2;
682 while ((GET_GPIO(0)))
684 // asm volatile ("dmb" ::: "memory");
687 inline uint32_t read16(uint32_t address) {
689 uint32_t addr_h_s = (address & 0x0000ffff) << 8;
690 uint32_t addr_h_r = (~address & 0x0000ffff) << 8;
691 uint32_t addr_l_s = (address >> 16) << 8;
692 uint32_t addr_l_r = (~address >> 16) << 8;
694 // asm volatile ("dmb" ::: "memory");
697 *(gpio + 1) = gpfsel1_o;
698 *(gpio + 2) = gpfsel2_o;
700 *(gpio + 7) = addr_h_s;
701 *(gpio + 10) = addr_h_r;
705 *(gpio + 7) = addr_l_s;
706 *(gpio + 10) = addr_l_r;
712 *(gpio + 1) = gpfsel1;
713 *(gpio + 2) = gpfsel2;
715 while (!(GET_GPIO(0)))
720 // asm volatile ("dmb" ::: "memory");
721 return (val >> 8) & 0xffff;
724 inline uint32_t read8(uint32_t address) {
726 uint32_t addr_h_s = (address & 0x0000ffff) << 8;
727 uint32_t addr_h_r = (~address & 0x0000ffff) << 8;
728 uint32_t addr_l_s = (address >> 16) << 8;
729 uint32_t addr_l_r = (~address >> 16) << 8;
731 // asm volatile ("dmb" ::: "memory");
734 *(gpio + 1) = gpfsel1_o;
735 *(gpio + 2) = gpfsel2_o;
737 *(gpio + 7) = addr_h_s;
738 *(gpio + 10) = addr_h_r;
742 *(gpio + 7) = addr_l_s;
743 *(gpio + 10) = addr_l_r;
749 *(gpio + 1) = gpfsel1;
750 *(gpio + 2) = gpfsel2;
753 while (!(GET_GPIO(0)))
758 // asm volatile ("dmb" ::: "memory");
760 val = (val >> 8) & 0xffff;
761 if ((address & 1) == 0)
762 return (val >> 8) & 0xff; // EVEN, A0=0,UDS
764 return val & 0xff; // ODD , A0=1,LDS
767 /******************************************************/
769 void write_reg(unsigned int value) {
772 *(gpio + 1) = gpfsel1_o;
773 *(gpio + 2) = gpfsel2_o;
774 *(gpio + 7) = (value & 0xffff) << 8;
775 *(gpio + 10) = (~value & 0xffff) << 8;
777 GPIO_CLR = 1 << 7; // delay
782 *(gpio + 1) = gpfsel1;
783 *(gpio + 2) = gpfsel2;
786 uint16_t read_reg(void) {
791 *(gpio + 1) = gpfsel1;
792 *(gpio + 2) = gpfsel2;
794 GPIO_CLR = 1 << 6; // delay
799 return (uint16_t)(val >> 8);
803 // Set up a memory regions to access GPIO
807 if ((mem_fd = open("/dev/mem", O_RDWR | O_SYNC)) < 0) {
808 printf("can't open /dev/mem \n");
814 NULL, // Any adddress in our space will do
815 BCM2708_PERI_SIZE, // Map length
816 PROT_READ | PROT_WRITE, // Enable reading & writting to mapped memory
817 MAP_SHARED, // Shared with other processes
818 mem_fd, // File to map
819 BCM2708_PERI_BASE // Offset to GPIO peripheral
822 close(mem_fd); // No need to keep mem_fd open after mmap
824 if (gpio_map == MAP_FAILED) {
825 printf("gpio mmap error %d\n", (int)gpio_map); // errno also set!
829 gpio = ((volatile unsigned *)gpio_map) + GPIO_ADDR / 4;
830 gpclk = ((volatile unsigned *)gpio_map) + GPCLK_ADDR / 4;