14 #include <sys/types.h>
16 #include <sys/ioctl.h>
21 #include "config_file/config_file.h"
22 #include "input/input.h"
24 //#define BCM2708_PERI_BASE 0x20000000 //pi0-1
25 //#define BCM2708_PERI_BASE 0xFE000000 //pi4
26 #define BCM2708_PERI_BASE 0x3F000000 // pi3
27 #define BCM2708_PERI_SIZE 0x01000000
28 #define GPIO_BASE (BCM2708_PERI_BASE + 0x200000) /* GPIO controller */
29 #define GPCLK_BASE (BCM2708_PERI_BASE + 0x101000)
30 #define GPIO_ADDR 0x200000 /* GPIO controller */
31 #define GPCLK_ADDR 0x101000
32 #define CLK_PASSWD 0x5a000000
33 #define CLK_GP0_CTL 0x070
34 #define CLK_GP0_DIV 0x074
40 #define STATUSREGADDR \
41 GPIO_CLR = 1 << SA0; \
42 GPIO_CLR = 1 << SA1; \
45 GPIO_CLR = 1 << SA0; \
46 GPIO_CLR = 1 << SA1; \
49 GPIO_SET = 1 << SA0; \
50 GPIO_CLR = 1 << SA1; \
53 GPIO_CLR = 1 << SA0; \
54 GPIO_SET = 1 << SA1; \
57 GPIO_SET = 1 << SA0; \
58 GPIO_SET = 1 << SA1; \
61 #define PAGE_SIZE (4 * 1024)
62 #define BLOCK_SIZE (4 * 1024)
64 #define GPIOSET(no, ishigh) \
69 reset |= (1 << (no)); \
72 #define FASTBASE 0x07FFFFFF
73 #define FASTSIZE 0xFFFFFFF
74 #define GAYLEBASE 0xD80000 // D7FFFF
75 #define GAYLESIZE 0x6FFFF
77 #define JOY0DAT 0xDFF00A
78 #define JOY1DAT 0xDFF00C
79 #define CIAAPRA 0xBFE001
80 #define POTGOR 0xDFF016
82 int kb_hook_enabled = 0;
83 int mouse_hook_enabled = 0;
84 int cpu_emulation_running = 1;
86 char mouse_dx = 0, mouse_dy = 0;
87 char mouse_buttons = 0;
89 #define KICKBASE 0xF80000
90 #define KICKSIZE 0x7FFFF
92 int mem_fd, mouse_fd = -1;
94 int gayle_emulation_enabled = 1;
98 // Configurable emulator options
99 unsigned int cpu_type = M68K_CPU_TYPE_68000;
100 unsigned int loop_cycles = 300;
101 struct emulator_config *cfg = NULL;
104 volatile unsigned int *gpio;
105 volatile unsigned int *gpclk;
106 volatile unsigned int gpfsel0;
107 volatile unsigned int gpfsel1;
108 volatile unsigned int gpfsel2;
109 volatile unsigned int gpfsel0_o;
110 volatile unsigned int gpfsel1_o;
111 volatile unsigned int gpfsel2_o;
113 // GPIO setup macros. Always use INP_GPIO(x) before using OUT_GPIO(x) or
115 #define INP_GPIO(g) *(gpio + ((g) / 10)) &= ~(7 << (((g) % 10) * 3))
116 #define OUT_GPIO(g) *(gpio + ((g) / 10)) |= (1 << (((g) % 10) * 3))
117 #define SET_GPIO_ALT(g, a) \
118 *(gpio + (((g) / 10))) |= \
119 (((a) <= 3 ? (a) + 4 : (a) == 4 ? 3 : 2) << (((g) % 10) * 3))
122 *(gpio + 7) // sets bits which are 1 ignores bits which are 0
124 *(gpio + 10) // clears bits which are 1 ignores bits which are 0
126 #define GET_GPIO(g) (*(gpio + 13) & (1 << g)) // 0 if LOW, (1<<g) if HIGH
128 #define GPIO_PULL *(gpio + 37) // Pull up/pull down
129 #define GPIO_PULLCLK0 *(gpio + 38) // Pull up/pull down clock
133 uint32_t read8(uint32_t address);
134 void write8(uint32_t address, uint32_t data);
136 uint32_t read16(uint32_t address);
137 void write16(uint32_t address, uint32_t data);
139 void write32(uint32_t address, uint32_t data);
140 uint32_t read32(uint32_t address);
142 uint16_t read_reg(void);
143 void write_reg(unsigned int value);
145 volatile uint16_t srdata;
146 volatile uint32_t srdata2;
147 volatile uint32_t srdata2_old;
149 //unsigned char g_kick[524288];
150 //unsigned char g_ram[FASTSIZE + 1]; /* RAM */
151 unsigned char toggle;
152 static volatile unsigned char ovl;
153 static volatile unsigned char maprom;
155 void sigint_handler(int sig_num) {
157 //cpu_emulation_running = 0;
160 printf("Received sigint %d, exiting.\n", sig_num);
169 void *iplThread(void *args) {
170 printf("IPL thread running/n");
174 if (GET_GPIO(1) == 0) {
176 m68k_end_timeslice();
177 //printf("thread!/n");
186 int main(int argc, char *argv[]) {
188 const struct sched_param priority = {99};
190 // Some command line switch stuffles
191 for (g = 1; g < argc; g++) {
192 if (strcmp(argv[g], "--disable-gayle") == 0) {
193 gayle_emulation_enabled = 0;
195 else if (strcmp(argv[g], "--cpu_type") == 0 || strcmp(argv[g], "--cpu") == 0) {
197 printf("%s switch found, but no CPU type specified.\n", argv[g]);
200 cpu_type = get_m68k_cpu_type(argv[g]);
203 else if (strcmp(argv[g], "--config-file") == 0 || strcmp(argv[g], "--config") == 0) {
205 printf("%s switch found, but no config filename specified.\n", argv[g]);
208 cfg = load_config_file(argv[g]);
214 printf("No config file specified. Trying to load default.cfg...\n");
215 cfg = load_config_file("default.cfg");
217 printf("Couldn't load default.cfg, empty emulator config will be used.\n");
218 cfg = (struct emulator_config *)calloc(1, sizeof(struct emulator_config));
220 printf("Failed to allocate memory for emulator config!\n");
223 memset(cfg, 0x00, sizeof(struct emulator_config));
228 if (cfg->cpu_type) cpu_type = cfg->cpu_type;
229 if (cfg->loop_cycles) loop_cycles = cfg->loop_cycles;
232 if (cfg->mouse_enabled) {
233 mouse_fd = open(cfg->mouse_file, O_RDONLY | O_NONBLOCK);
234 if (mouse_fd == -1) {
235 printf("Failed to open %s, can't enable mouse hook.\n", cfg->mouse_file);
236 cfg->mouse_enabled = 0;
240 sched_setscheduler(0, SCHED_FIFO, &priority);
241 mlockall(MCL_CURRENT); // lock in memory to keep us from paging out
245 signal(SIGINT, sigint_handler);
248 //goto skip_everything;
250 // Enable 200MHz CLK output on GPIO4, adjust divider and pll source depending
252 printf("Enable 200MHz GPCLK0 on GPIO4\n");
254 *(gpclk + (CLK_GP0_CTL / 4)) = CLK_PASSWD | (1 << 5);
256 while ((*(gpclk + (CLK_GP0_CTL / 4))) & (1 << 7))
259 *(gpclk + (CLK_GP0_DIV / 4)) =
260 CLK_PASSWD | (6 << 12); // divider , 6=200MHz on pi3
262 *(gpclk + (CLK_GP0_CTL / 4)) =
263 CLK_PASSWD | 5 | (1 << 4); // pll? 6=plld, 5=pllc
265 while (((*(gpclk + (CLK_GP0_CTL / 4))) & (1 << 7)) == 0)
269 SET_GPIO_ALT(4, 0); // gpclk0
279 // set gpio0 (aux0) and gpio1 (aux1) to input
283 // Set GPIO pins 6,7 and 8-23 to output
284 for (g = 6; g <= 23; g++) {
288 printf("Precalculate GPIO8-23 as Output\n");
289 gpfsel0_o = *(gpio); // store gpio ddr
290 printf("gpfsel0: %#x\n", gpfsel0_o);
291 gpfsel1_o = *(gpio + 1); // store gpio ddr
292 printf("gpfsel1: %#x\n", gpfsel1_o);
293 gpfsel2_o = *(gpio + 2); // store gpio ddr
294 printf("gpfsel2: %#x\n", gpfsel2_o);
296 // Set GPIO pins 8-23 to input
297 for (g = 8; g <= 23; g++) {
300 printf("Precalculate GPIO8-23 as Input\n");
301 gpfsel0 = *(gpio); // store gpio ddr
302 printf("gpfsel0: %#x\n", gpfsel0);
303 gpfsel1 = *(gpio + 1); // store gpio ddr
304 printf("gpfsel1: %#x\n", gpfsel1);
305 gpfsel2 = *(gpio + 2); // store gpio ddr
306 printf("gpfsel2: %#x\n", gpfsel2);
315 // reset cpld statemachine first
323 // reset amiga and statemachine
327 m68k_write_memory_8(0xbfe201, 0x0001); // AMIGA OVL
328 m68k_write_memory_8(0xbfe001, 0x0001); // AMIGA OVL high (ROM@0x0)
333 printf("Setting CPU type to %d.\n", cpu_type);
334 m68k_set_cpu_type(cpu_type);
338 m68k_set_reg(M68K_REG_PC, 0xF80002);
340 m68k_set_reg(M68K_REG_PC, 0x0);
346 err = pthread_create(&id, NULL, &iplThread, NULL);
348 printf("\ncan't create IPL thread :[%s]", strerror(err));
350 printf("\n IPL Thread created successfully\n");
355 if (mouse_hook_enabled) {
356 if (get_mouse_status(&mouse_dx, &mouse_dy, &mouse_buttons)) {
357 //printf("Maus: %d (%.2X), %d (%.2X), B:%.2X\n", mouse_dx, mouse_dx, mouse_dy, mouse_dy, mouse_buttons);
361 if (cpu_emulation_running)
362 m68k_execute(loop_cycles);
366 if (c == cfg->keyboard_toggle_key && !kb_hook_enabled) {
368 printf("Keyboard hook enabled.\n");
370 else if (c == 0x1B && kb_hook_enabled) {
372 printf("Keyboard hook disabled.\n");
374 if (c == cfg->mouse_toggle_key) {
375 mouse_hook_enabled ^= 1;
376 printf("Mouse hook %s.\n", mouse_hook_enabled ? "enabled" : "disabled");
377 mouse_dx = mouse_dy = mouse_buttons = 0;
380 cpu_emulation_running ^= 1;
381 printf("CPU emulation is now %s\n", cpu_emulation_running ? "running" : "stopped");
386 printf("CPU emulation reset.\n");
389 printf("Quitting and exiting emulator.\n");
390 goto stop_cpu_emulation;
396 m68k_set_irq((srdata >> 13) & 0xff);
404 if (GET_GPIO(1) == 0) {
406 m68k_set_irq((srdata >> 13) & 0xff);
408 if (CheckIrq() == 1) {
409 write16(0xdff09c, 0x8008);
428 void cpu_pulse_reset(void) {
430 // printf("Status Reg%x\n",read_reg());
433 // printf("Status Reg%x\n",read_reg());
436 int cpu_irq_ack(int level) {
437 printf("cpu irq ack\n");
441 static unsigned int target = 0;
443 unsigned int m68k_read_memory_8(unsigned int address) {
445 int ret = handle_mapped_read(cfg, address, &target, OP_TYPE_BYTE, ovl);
451 // if (address < 0xffffff) {
452 return read8((uint32_t)address);
458 unsigned int m68k_read_memory_16(unsigned int address) {
460 int ret = handle_mapped_read(cfg, address, &target, OP_TYPE_WORD, ovl);
465 if (mouse_hook_enabled) {
466 if (address == JOY0DAT) {
467 // Forward mouse valueses to Amyga.
468 unsigned short result = (mouse_dy << 8) | (mouse_dx);
469 mouse_dx = mouse_dy = 0;
470 return (unsigned int)result;
472 if (address == CIAAPRA) {
473 unsigned short result = (unsigned int)read16((uint32_t)address);
474 if (mouse_buttons & 0x01) {
476 return (unsigned int)(result | 0x40);
479 return (unsigned int)result;
481 if (address == POTGOR) {
482 unsigned short result = (unsigned int)read16((uint32_t)address);
483 if (mouse_buttons & 0x02) {
485 return (unsigned int)(result | 0x2);
488 return (unsigned int)result;
492 // if (address < 0xffffff) {
494 return (unsigned int)read16((uint32_t)address);
500 unsigned int m68k_read_memory_32(unsigned int address) {
502 int ret = handle_mapped_read(cfg, address, &target, OP_TYPE_LONGWORD, ovl);
507 // if (address < 0xffffff) {
509 uint16_t a = read16(address);
510 uint16_t b = read16(address + 2);
511 return (a << 16) | b;
517 void m68k_write_memory_8(unsigned int address, unsigned int value) {
519 int ret = handle_mapped_write(cfg, address, value, OP_TYPE_BYTE, ovl);
524 if (address == 0xbfe001) {
525 ovl = (value & (1 << 0));
526 printf("OVL:%x\n", ovl);
529 // if (address < 0xffffff) {
531 write8((uint32_t)address, value);
538 void m68k_write_memory_16(unsigned int address, unsigned int value) {
540 int ret = handle_mapped_write(cfg, address, value, OP_TYPE_WORD, ovl);
545 // if (address < 0xffffff) {
547 write16((uint32_t)address, value);
553 void m68k_write_memory_32(unsigned int address, unsigned int value) {
555 int ret = handle_mapped_write(cfg, address, value, OP_TYPE_LONGWORD, ovl);
560 // if (address < 0xffffff) {
562 write16(address, value >> 16);
563 write16(address + 2, value);
570 void write16(uint32_t address, uint32_t data) {
571 uint32_t addr_h_s = (address & 0x0000ffff) << 8;
572 uint32_t addr_h_r = (~address & 0x0000ffff) << 8;
573 uint32_t addr_l_s = (address >> 16) << 8;
574 uint32_t addr_l_r = (~address >> 16) << 8;
575 uint32_t data_s = (data & 0x0000ffff) << 8;
576 uint32_t data_r = (~data & 0x0000ffff) << 8;
578 // asm volatile ("dmb" ::: "memory");
581 *(gpio + 1) = gpfsel1_o;
582 *(gpio + 2) = gpfsel2_o;
584 *(gpio + 7) = addr_h_s;
585 *(gpio + 10) = addr_h_r;
589 *(gpio + 7) = addr_l_s;
590 *(gpio + 10) = addr_l_r;
595 *(gpio + 7) = data_s;
596 *(gpio + 10) = data_r;
601 *(gpio + 1) = gpfsel1;
602 *(gpio + 2) = gpfsel2;
603 while ((GET_GPIO(0)))
605 // asm volatile ("dmb" ::: "memory");
608 void write8(uint32_t address, uint32_t data) {
609 if ((address & 1) == 0)
610 data = data + (data << 8); // EVEN, A0=0,UDS
612 data = data & 0xff; // ODD , A0=1,LDS
613 uint32_t addr_h_s = (address & 0x0000ffff) << 8;
614 uint32_t addr_h_r = (~address & 0x0000ffff) << 8;
615 uint32_t addr_l_s = (address >> 16) << 8;
616 uint32_t addr_l_r = (~address >> 16) << 8;
617 uint32_t data_s = (data & 0x0000ffff) << 8;
618 uint32_t data_r = (~data & 0x0000ffff) << 8;
620 // asm volatile ("dmb" ::: "memory");
623 *(gpio + 1) = gpfsel1_o;
624 *(gpio + 2) = gpfsel2_o;
626 *(gpio + 7) = addr_h_s;
627 *(gpio + 10) = addr_h_r;
631 *(gpio + 7) = addr_l_s;
632 *(gpio + 10) = addr_l_r;
637 *(gpio + 7) = data_s;
638 *(gpio + 10) = data_r;
643 *(gpio + 1) = gpfsel1;
644 *(gpio + 2) = gpfsel2;
645 while ((GET_GPIO(0)))
647 // asm volatile ("dmb" ::: "memory");
650 uint32_t read16(uint32_t address) {
652 uint32_t addr_h_s = (address & 0x0000ffff) << 8;
653 uint32_t addr_h_r = (~address & 0x0000ffff) << 8;
654 uint32_t addr_l_s = (address >> 16) << 8;
655 uint32_t addr_l_r = (~address >> 16) << 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;
675 *(gpio + 1) = gpfsel1;
676 *(gpio + 2) = gpfsel2;
678 while (!(GET_GPIO(0)))
683 // asm volatile ("dmb" ::: "memory");
684 return (val >> 8) & 0xffff;
687 uint32_t read8(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;
716 while (!(GET_GPIO(0)))
721 // asm volatile ("dmb" ::: "memory");
723 val = (val >> 8) & 0xffff;
724 if ((address & 1) == 0)
725 return (val >> 8) & 0xff; // EVEN, A0=0,UDS
727 return val & 0xff; // ODD , A0=1,LDS
730 /******************************************************/
732 void write_reg(unsigned int value) {
735 *(gpio + 1) = gpfsel1_o;
736 *(gpio + 2) = gpfsel2_o;
737 *(gpio + 7) = (value & 0xffff) << 8;
738 *(gpio + 10) = (~value & 0xffff) << 8;
740 GPIO_CLR = 1 << 7; // delay
745 *(gpio + 1) = gpfsel1;
746 *(gpio + 2) = gpfsel2;
749 uint16_t read_reg(void) {
754 *(gpio + 1) = gpfsel1;
755 *(gpio + 2) = gpfsel2;
757 GPIO_CLR = 1 << 6; // delay
762 return (uint16_t)(val >> 8);
766 // Set up a memory regions to access GPIO
770 if ((mem_fd = open("/dev/mem", O_RDWR | O_SYNC)) < 0) {
771 printf("can't open /dev/mem \n");
777 NULL, // Any adddress in our space will do
778 BCM2708_PERI_SIZE, // Map length
779 PROT_READ | PROT_WRITE, // Enable reading & writting to mapped memory
780 MAP_SHARED, // Shared with other processes
781 mem_fd, // File to map
782 BCM2708_PERI_BASE // Offset to GPIO peripheral
785 close(mem_fd); // No need to keep mem_fd open after mmap
787 if (gpio_map == MAP_FAILED) {
788 printf("gpio mmap error %d\n", (int)gpio_map); // errno also set!
792 gpio = ((volatile unsigned *)gpio_map) + GPIO_ADDR / 4;
793 gpclk = ((volatile unsigned *)gpio_map) + GPCLK_ADDR / 4;