mirror of
https://github.com/captain-amygdala/pistorm.git
synced 2026-01-25 11:36:08 +00:00
474 lines
12 KiB
C
474 lines
12 KiB
C
#include <assert.h>
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#include <dirent.h>
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#include <endian.h>
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#include <fcntl.h>
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#include <pthread.h>
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#include <sched.h>
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#include <signal.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/mman.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include <sys/ioctl.h>
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#include "m68k.h"
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#include "main.h"
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#include "platforms/platforms.h"
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#include "input/input.h"
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#include "platforms/amiga/Gayle.h"
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#include "platforms/amiga/gayle-ide/ide.h"
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#include "platforms/amiga/amiga-registers.h"
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#include "platforms/amiga/rtg/rtg.h"
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#include "gpio/gpio.h"
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unsigned char read_ranges;
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unsigned int read_addr[8];
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unsigned int read_upper[8];
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unsigned char *read_data[8];
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unsigned char write_ranges;
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unsigned int write_addr[8];
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unsigned int write_upper[8];
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unsigned char *write_data[8];
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int kb_hook_enabled = 0;
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int mouse_hook_enabled = 0;
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int cpu_emulation_running = 1;
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char mouse_dx = 0, mouse_dy = 0;
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char mouse_buttons = 0;
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extern volatile unsigned int *gpio;
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extern volatile uint16_t srdata;
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extern uint8_t realtime_graphics_debug;
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uint8_t realtime_disassembly;
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char disasm_buf[4096];
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#define KICKBASE 0xF80000
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#define KICKSIZE 0x7FFFF
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int mem_fd, mouse_fd = -1, keyboard_fd = -1;
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int mem_fd_gpclk;
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int gayle_emulation_enabled = 1;
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int irq;
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int gayleirq;
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void *iplThread(void *args) {
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printf("IPL thread running\n");
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while (1) {
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if (!gpio_get_irq()) {
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irq = 1;
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m68k_end_timeslice();
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}
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else
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irq = 0;
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if (gayle_emulation_enabled) {
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if ((gayle_int & 0x80) && get_ide(0)->drive->intrq) {
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gayleirq = 1;
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m68k_end_timeslice();
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}
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else
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gayleirq = 0;
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}
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usleep(0);
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}
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return args;
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}
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// Configurable emulator options
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unsigned int cpu_type = M68K_CPU_TYPE_68000;
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unsigned int loop_cycles = 300;
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struct emulator_config *cfg = NULL;
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char keyboard_file[256] = "/dev/input/event1";
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//unsigned char g_kick[524288];
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//unsigned char g_ram[FASTSIZE + 1]; /* RAM */
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int ovl;
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static volatile unsigned char maprom;
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void sigint_handler(int sig_num) {
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//if (sig_num) { }
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//cpu_emulation_running = 0;
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//return;
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printf("Received sigint %d, exiting.\n", sig_num);
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if (mouse_fd != -1)
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close(mouse_fd);
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if (mem_fd)
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close(mem_fd);
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if (cfg->platform->shutdown) {
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cfg->platform->shutdown(cfg);
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}
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exit(0);
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}
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int main(int argc, char *argv[]) {
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int g;
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const struct sched_param priority = {99};
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// Some command line switch stuffles
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for (g = 1; g < argc; g++) {
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if (strcmp(argv[g], "--disable-gayle") == 0) {
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gayle_emulation_enabled = 0;
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}
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else if (strcmp(argv[g], "--cpu_type") == 0 || strcmp(argv[g], "--cpu") == 0) {
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if (g + 1 >= argc) {
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printf("%s switch found, but no CPU type specified.\n", argv[g]);
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} else {
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g++;
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cpu_type = get_m68k_cpu_type(argv[g]);
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}
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}
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else if (strcmp(argv[g], "--config-file") == 0 || strcmp(argv[g], "--config") == 0) {
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if (g + 1 >= argc) {
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printf("%s switch found, but no config filename specified.\n", argv[g]);
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} else {
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g++;
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cfg = load_config_file(argv[g]);
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}
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}
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else if (strcmp(argv[g], "--keyboard-file") == 0 || strcmp(argv[g], "--kbfile") == 0) {
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if (g + 1 >= argc) {
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printf("%s switch found, but no keyboard device path specified.\n", argv[g]);
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} else {
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g++;
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strcpy(keyboard_file, argv[g]);
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}
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}
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}
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if (!cfg) {
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printf("No config file specified. Trying to load default.cfg...\n");
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cfg = load_config_file("default.cfg");
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if (!cfg) {
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printf("Couldn't load default.cfg, empty emulator config will be used.\n");
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cfg = (struct emulator_config *)calloc(1, sizeof(struct emulator_config));
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if (!cfg) {
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printf("Failed to allocate memory for emulator config!\n");
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return 1;
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}
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memset(cfg, 0x00, sizeof(struct emulator_config));
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}
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}
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if (cfg) {
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if (cfg->cpu_type) cpu_type = cfg->cpu_type;
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if (cfg->loop_cycles) loop_cycles = cfg->loop_cycles;
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if (!cfg->platform)
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cfg->platform = make_platform_config("none", "generic");
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cfg->platform->platform_initial_setup(cfg);
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}
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if (cfg->mouse_enabled) {
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mouse_fd = open(cfg->mouse_file, O_RDONLY | O_NONBLOCK);
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if (mouse_fd == -1) {
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printf("Failed to open %s, can't enable mouse hook.\n", cfg->mouse_file);
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cfg->mouse_enabled = 0;
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}
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}
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keyboard_fd = open(keyboard_file, O_RDONLY | O_NONBLOCK);
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if (keyboard_fd == -1) {
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printf("Failed to open keyboard event source.\n");
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}
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InitGayle();
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signal(SIGINT, sigint_handler);
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setup_io();
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//goto skip_everything;
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// Enable 200MHz CLK output on GPIO4, adjust divider and pll source depending
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// on pi model
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printf("Enable 200MHz GPCLK0 on GPIO4\n");
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gpio_enable_200mhz();
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// reset cpld statemachine first
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write_reg(0x01);
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usleep(100);
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usleep(1500);
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write_reg(0x00);
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usleep(100);
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// reset amiga and statemachine
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skip_everything:;
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usleep(1500);
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m68k_init();
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printf("Setting CPU type to %d.\n", cpu_type);
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m68k_set_cpu_type(cpu_type);
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cpu_pulse_reset();
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if (maprom == 1) {
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m68k_set_reg(M68K_REG_PC, 0xF80002);
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} else {
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m68k_set_reg(M68K_REG_PC, 0x0);
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}
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char c = 0;
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pthread_t id;
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int err;
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err = pthread_create(&id, NULL, &iplThread, NULL);
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if (err != 0)
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printf("can't create IPL thread :[%s]", strerror(err));
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else
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printf("IPL Thread created successfully\n");
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m68k_pulse_reset();
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while (42) {
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if (mouse_hook_enabled) {
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get_mouse_status(&mouse_dx, &mouse_dy, &mouse_buttons);
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}
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if (cpu_emulation_running)
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m68k_execute(loop_cycles);
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disasm_run:;
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if (realtime_disassembly) {
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m68k_execute(1);
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m68k_disassemble(disasm_buf, m68k_get_reg(NULL, M68K_REG_PC), cpu_type);
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printf("%.8X (%.8X)]] %s\n", m68k_get_reg(NULL, M68K_REG_PC), (m68k_get_reg(NULL, M68K_REG_PC) & 0xFFFFFF), disasm_buf);
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}
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if (irq) {
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unsigned int status = read_reg();
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m68k_set_irq((status & 0xe000) >> 13);
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//printf("There was an IRQ: %d\n", (status & 0xe000) >> 13);
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}
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else if (gayleirq) {
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write16(0xdff09c, 0x8000 | (1 << 3));
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//PAULA_SET_IRQ(3); // IRQ 3 = INT2
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m68k_set_irq(2);
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}
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else {
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m68k_set_irq(0);
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}
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//usleep(0);
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// FIXME: Rework this to use keyboard events instead.
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while (get_key_char(&c)) {
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if (c == cfg->keyboard_toggle_key && !kb_hook_enabled) {
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kb_hook_enabled = 1;
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printf("Keyboard hook enabled.\n");
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}
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else if (c == 0x1B && kb_hook_enabled) {
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kb_hook_enabled = 0;
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printf("Keyboard hook disabled.\n");
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}
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if (!kb_hook_enabled) {
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if (c == cfg->mouse_toggle_key) {
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mouse_hook_enabled ^= 1;
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printf("Mouse hook %s.\n", mouse_hook_enabled ? "enabled" : "disabled");
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mouse_dx = mouse_dy = mouse_buttons = 0;
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}
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if (c == 'r') {
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cpu_emulation_running ^= 1;
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printf("CPU emulation is now %s\n", cpu_emulation_running ? "running" : "stopped");
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}
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if (c == 'g') {
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realtime_graphics_debug ^= 1;
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printf("Real time graphics debug is now %s\n", realtime_graphics_debug ? "on" : "off");
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}
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if (c == 'R') {
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cpu_pulse_reset();
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m68k_pulse_reset();
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printf("CPU emulation reset.\n");
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}
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if (c == 'q') {
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printf("Quitting and exiting emulator.\n");
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goto stop_cpu_emulation;
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}
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if (c == 'd') {
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realtime_disassembly ^= 1;
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printf("Real time disassembly is now %s\n", realtime_disassembly ? "on" : "off");
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}
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}
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}
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if (realtime_disassembly)
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goto disasm_run;
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//gpio_handle_irq();
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//GPIO_HANDLE_IRQ;
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}
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stop_cpu_emulation:;
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if (mouse_fd != -1)
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close(mouse_fd);
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if (mem_fd)
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close(mem_fd);
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return 0;
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}
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void cpu_pulse_reset(void) {
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write_reg(0x00);
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// printf("Status Reg%x\n",read_reg());
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usleep(100000);
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write_reg(0x02);
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// printf("Status Reg%x\n",read_reg());
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ovl = 1;
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m68k_write_memory_8(0xbfe201, 0x0001); // AMIGA OVL
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m68k_write_memory_8(0xbfe001, 0x0001); // AMIGA OVL high (ROM@0x0)
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m68k_pulse_reset();
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}
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int cpu_irq_ack(int level) {
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printf("cpu irq ack\n");
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return level;
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}
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static unsigned int target = 0;
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#define PLATFORM_CHECK_READ(a) \
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if (address >= cfg->custom_low && address < cfg->custom_high) { \
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unsigned int target = 0; \
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switch(cfg->platform->id) { \
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case PLATFORM_AMIGA: { \
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if (address >= PIGFX_RTG_BASE && address < PIGFX_UPPER) { \
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return rtg_read((address & 0x0FFFFFFF), a); \
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} \
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if (custom_read_amiga(cfg, address, &target, a) != -1) { \
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return target; \
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} \
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break; \
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} \
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default: \
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break; \
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} \
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} \
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if (ovl || (address >= cfg->mapped_low && address < cfg->mapped_high)) { \
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if (handle_mapped_read(cfg, address, &target, a) != -1) \
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return target; \
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}
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unsigned int m68k_read_memory_8(unsigned int address) {
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PLATFORM_CHECK_READ(OP_TYPE_BYTE);
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if (mouse_hook_enabled) {
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if (address == CIAAPRA) {
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unsigned char result = (unsigned int)read8((uint32_t)address);
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if (mouse_buttons & 0x01) {
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//mouse_buttons -= 1;
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return (unsigned int)(result ^ 0x40);
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}
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else
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return (unsigned int)result;
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}
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}
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address &=0xFFFFFF;
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return read8((uint32_t)address);
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}
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unsigned int m68k_read_memory_16(unsigned int address) {
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PLATFORM_CHECK_READ(OP_TYPE_WORD);
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if (mouse_hook_enabled) {
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if (address == JOY0DAT) {
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// Forward mouse valueses to Amyga.
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unsigned short result = (mouse_dy << 8) | (mouse_dx);
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return (unsigned int)result;
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}
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/*if (address == CIAAPRA) {
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unsigned short result = (unsigned int)read16((uint32_t)address);
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if (mouse_buttons & 0x01) {
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return (unsigned int)(result | 0x40);
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}
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else
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return (unsigned int)result;
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}*/
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if (address == POTGOR) {
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unsigned short result = (unsigned int)read16((uint32_t)address);
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if (mouse_buttons & 0x02) {
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return (unsigned int)(result ^ (0x2 << 9));
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}
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else
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return (unsigned int)(result & 0xFFFD);
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}
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}
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address &=0xFFFFFF;
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return (unsigned int)read16((uint32_t)address);
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}
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unsigned int m68k_read_memory_32(unsigned int address) {
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PLATFORM_CHECK_READ(OP_TYPE_LONGWORD);
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address &=0xFFFFFF;
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uint16_t a = read16(address);
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uint16_t b = read16(address + 2);
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return (a << 16) | b;
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}
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#define PLATFORM_CHECK_WRITE(a) \
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if (address >= cfg->custom_low && address < cfg->custom_high) { \
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switch(cfg->platform->id) { \
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case PLATFORM_AMIGA: { \
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if (address >= PIGFX_RTG_BASE && address < PIGFX_UPPER) { \
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rtg_write((address & 0x0FFFFFFF), value, a); \
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return; \
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} \
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if (custom_write_amiga(cfg, address, value, a) != -1) { \
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return; \
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} \
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break; \
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} \
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default: \
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break; \
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} \
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} \
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if (address >= cfg->mapped_low && address < cfg->mapped_high) { \
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if (handle_mapped_write(cfg, address, value, a) != -1) \
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return; \
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}
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void m68k_write_memory_8(unsigned int address, unsigned int value) {
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PLATFORM_CHECK_WRITE(OP_TYPE_BYTE);
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if (address == 0xbfe001) {
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if (ovl != (value & (1 << 0))) {
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ovl = (value & (1 << 0));
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printf("OVL:%x\n", ovl);
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}
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}
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address &=0xFFFFFF;
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write8((uint32_t)address, value);
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return;
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}
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void m68k_write_memory_16(unsigned int address, unsigned int value) {
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PLATFORM_CHECK_WRITE(OP_TYPE_WORD);
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address &=0xFFFFFF;
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write16((uint32_t)address, value);
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return;
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}
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void m68k_write_memory_32(unsigned int address, unsigned int value) {
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PLATFORM_CHECK_WRITE(OP_TYPE_LONGWORD);
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address &=0xFFFFFF;
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write16(address, value >> 16);
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write16(address + 2, value);
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return;
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}
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