diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..da773f7 --- /dev/null +++ b/.gitignore @@ -0,0 +1,5 @@ +*.o +/m68kmake +/m68kmake.exe +/m68kops.c +/m68kops.h diff --git a/Makefile b/Makefile index 1f8e2a2..9060f95 100644 --- a/Makefile +++ b/Makefile @@ -1,6 +1,6 @@ EXENAME = emulator -MAINFILES = emulator.c Gayle.c ide.c +MAINFILES = emulator.c Gayle.c ide.c memory_mapped.c config_file/config_file.c registers/registers_amiga.c input/input.c MUSASHIFILES = m68kcpu.c softfloat/softfloat.c MUSASHIGENCFILES = m68kops.c MUSASHIGENHFILES = m68kops.h diff --git a/config_file/config_file.c b/config_file/config_file.c new file mode 100644 index 0000000..b7eff98 --- /dev/null +++ b/config_file/config_file.c @@ -0,0 +1,380 @@ +#include "config_file.h" +#include +#include +#include + +#define M68K_CPU_TYPES M68K_CPU_TYPE_SCC68070 + +const char *cpu_types[M68K_CPU_TYPES] = { + "68000", + "68010", + "68EC020", + "68020", + "68EC030", + "68030", + "68EC040", + "68LC040", + "68040", + "SCC68070", +}; + +const char *map_type_names[MAPTYPE_NUM] = { + "NONE", + "rom", + "ram", + "register", +}; + +const char *config_item_names[CONFITEM_NUM] = { + "NONE", + "cpu", + "map", + "loopcycles", + "mouse", + "keyboard", +}; + +const char *mapcmd_names[MAPCMD_NUM] = { + "NONE", + "type", + "address", + "size", + "range", + "file", + "ovl", + "id", +}; + +int get_config_item_type(char *cmd) { + for (int i = 0; i < CONFITEM_NUM; i++) { + if (strcmp(cmd, config_item_names[i]) == 0) { + return i; + } + } + + return CONFITEM_NONE; +} + +unsigned int get_m68k_cpu_type(char *name) { + for (int i = 0; i < M68K_CPU_TYPES; i++) { + if (strcmp(name, cpu_types[i]) == 0) { + printf("Set CPU type to %s.\n", cpu_types[i]); + return i + 1; + } + } + + printf ("Invalid CPU type %s specified, defaulting to 68000.\n", name); + return M68K_CPU_TYPE_68000; +} + +unsigned int get_map_cmd(char *name) { + for (int i = 1; i < MAPCMD_NUM; i++) { + if (strcmp(name, mapcmd_names[i]) == 0) { + return i; + } + } + + return MAPCMD_UNKNOWN; +} + +unsigned int get_map_type(char *name) { + for (int i = 1; i < MAPTYPE_NUM; i++) { + if (strcmp(name, map_type_names[i]) == 0) { + return i; + } + } + + return MAPTYPE_NONE; +} + +void trim_whitespace(char *str) { + while (strlen(str) != 0 && (str[strlen(str) - 1] == ' ' || str[strlen(str) - 1] == '\t' || str[strlen(str) - 1] == 0x0A || str[strlen(str) - 1] == 0x0D)) { + str[strlen(str) - 1] = '\0'; + } +} + +unsigned int get_int(char *str) { + if (strlen(str) == 0) + return -1; + + int ret_int = 0; + + if (strlen(str) > 2 && str[0] == '0' && str[1] == 'x') { + for (int i = 2; i < (int)strlen(str); i++) { + if (str[i] >= '0' && str[i] <= '9') { + ret_int = (str[i] - '0') | (ret_int << 4); + } + else { + switch(str[i]) { + case 'A': ret_int = 0xA | (ret_int << 4); break; + case 'B': ret_int = 0xB | (ret_int << 4); break; + case 'C': ret_int = 0xC | (ret_int << 4); break; + case 'D': ret_int = 0xD | (ret_int << 4); break; + case 'E': ret_int = 0xE | (ret_int << 4); break; + case 'F': ret_int = 0xF | (ret_int << 4); break; + case 'K': ret_int = ret_int * SIZE_KILO; break; + case 'M': ret_int = ret_int * SIZE_MEGA; break; + case 'G': ret_int = ret_int * SIZE_GIGA; break; + default: + printf("Unknown character %c in hex value.\n", str[i]); + break; + } + } + } + return ret_int; + } + else { + ret_int = atoi(str); + if (str[strlen(str) - 1] == 'K') + ret_int = ret_int * SIZE_KILO; + else if (str[strlen(str) - 1] == 'M') + ret_int = ret_int * SIZE_MEGA; + else if (str[strlen(str) - 1] == 'G') + ret_int = ret_int * SIZE_GIGA; + + return ret_int; + } +} + +void get_next_string(char *str, char *str_out, int *strpos, char separator) { + int str_pos = 0, out_pos = 0; + + if (!str_out) + return; + + if (strpos) + str_pos = *strpos; + + while (str[str_pos] == ' ' && str[str_pos] == '\t' && str_pos < (int)strlen(str)) { + str_pos++; + } + + for (int i = str_pos; i < (int)strlen(str); i++) { + str_out[out_pos] = str[i]; + if ((separator == ' ' && (str[i] == ' ' || str[i] == '\t')) || str[i] == separator) { + str_out[out_pos] = '\0'; + if (strpos) { + *strpos = i + 1; + } + break; + } + out_pos++; + if (i + 1 == (int)strlen(str) && strpos) { + *strpos = i + 1; + str_out[out_pos] = '\0'; + } + } +} + +void add_mapping(struct emulator_config *cfg, unsigned int type, unsigned int addr, unsigned int size, int mirr_addr, char *filename, char *map_id) { + unsigned int index = 0, file_size = 0; + FILE *in = NULL; + + while (index < MAX_NUM_MAPPED_ITEMS) { + if (cfg->map_type[index] == MAPTYPE_NONE) + break; + index++; + } + if (index == MAX_NUM_MAPPED_ITEMS) { + printf("Unable to map item, only %d items can be mapped with current binary.\n", MAX_NUM_MAPPED_ITEMS); + return; + } + + cfg->map_type[index] = type; + cfg->map_offset[index] = addr; + cfg->map_size[index] = size; + cfg->map_mirror[index] = mirr_addr; + if (strlen(map_id)) { + cfg->map_id[index] = (char *)malloc(strlen(map_id) + 1); + strcpy(cfg->map_id[index], map_id); + } + + switch(type) { + case MAPTYPE_RAM: + printf("Allocating %d bytes for RAM mapping (%d MB)...\n", size, size / 1024 / 1024); + cfg->map_data[index] = (unsigned char *)malloc(size); + if (!cfg->map_data[index]) { + printf("ERROR: Unable to allocate memory for mapped RAM!\n"); + goto mapping_failed; + } + memset(cfg->map_data[index], 0x00, size); + break; + case MAPTYPE_ROM: + in = fopen(filename, "rb"); + if (!in) { + printf("Failed to open file %s for ROM mapping.\n", filename); + goto mapping_failed; + } + fseek(in, 0, SEEK_END); + file_size = (int)ftell(in); + if (size == 0) { + cfg->map_size[index] = file_size; + } + fseek(in, 0, SEEK_SET); + cfg->map_data[index] = (unsigned char *)calloc(1, cfg->map_size[index]); + if (!cfg->map_data[index]) { + printf("ERROR: Unable to allocate memory for mapped ROM!\n"); + goto mapping_failed; + } + memset(cfg->map_data[index], 0x00, cfg->map_size[index]); + fread(cfg->map_data[index], (cfg->map_size[index] <= file_size) ? cfg->map_size[index] : file_size, 1, in); + fclose(in); + break; + case MAPTYPE_REGISTER: + default: + break; + break; + } + + printf("[MAP %d] Added %s mapping for range %.8lX-%.8lX (%lX)\n", index, map_type_names[type], cfg->map_offset[index], cfg->map_offset[index] + cfg->map_size[index] - 1, (uint64_t)cfg->map_data[index]); + + return; + + mapping_failed:; + cfg->map_type[index] = MAPTYPE_NONE; + if (in) + fclose(in); +} + +struct emulator_config *load_config_file(char *filename) { + FILE *in = fopen(filename, "rb"); + if (in == NULL) { + printf("Failed to open config file %s for reading.\n", filename); + return NULL; + } + + char *parse_line = NULL; + char cur_cmd[128]; + struct emulator_config *cfg = NULL; + int cur_line = 1; + + parse_line = (char *)calloc(1, 512); + if (!parse_line) { + printf("Failed to allocate memory for config file line buffer.\n"); + return NULL; + } + cfg = (struct emulator_config *)calloc(1, sizeof(struct emulator_config)); + if (!cfg) { + printf("Failed to allocate memory for temporary emulator config.\n"); + goto load_failed; + } + + memset(cfg, 0x00, sizeof(struct emulator_config)); + cfg->cpu_type = M68K_CPU_TYPE_68000; + + while (!feof(in)) { + int str_pos = 0; + memset(parse_line, 0x00, 512); + fgets(parse_line, 512, in); + + if (strlen(parse_line) <= 2 || parse_line[0] == '#' || parse_line[0] == '/') + goto skip_line; + + trim_whitespace(parse_line); + + get_next_string(parse_line, cur_cmd, &str_pos, ' '); + + switch (get_config_item_type(cur_cmd)) { + case CONFITEM_CPUTYPE: + cfg->cpu_type = get_m68k_cpu_type(parse_line + str_pos); + break; + case CONFITEM_MAP: { + unsigned int maptype = 0, mapsize = 0, mapaddr = 0; + int mirraddr = -1; + char mapfile[128], mapid[128]; + memset(mapfile, 0x00, 128); + memset(mapid, 0x00, 128); + + while (str_pos < (int)strlen(parse_line)) { + get_next_string(parse_line, cur_cmd, &str_pos, '='); + switch(get_map_cmd(cur_cmd)) { + case MAPCMD_TYPE: + get_next_string(parse_line, cur_cmd, &str_pos, ' '); + maptype = get_map_type(cur_cmd); + //printf("Type! %s\n", map_type_names[maptype]); + break; + case MAPCMD_ADDRESS: + get_next_string(parse_line, cur_cmd, &str_pos, ' '); + mapaddr = get_int(cur_cmd); + //printf("Address! %.8X\n", mapaddr); + break; + case MAPCMD_SIZE: + get_next_string(parse_line, cur_cmd, &str_pos, ' '); + mapsize = get_int(cur_cmd); + //printf("Size! %.8X\n", mapsize); + break; + case MAPCMD_RANGE: + get_next_string(parse_line, cur_cmd, &str_pos, '-'); + mapaddr = get_int(cur_cmd); + get_next_string(parse_line, cur_cmd, &str_pos, ' '); + mapsize = get_int(cur_cmd) - 1 - mapaddr; + //printf("Range! %d-%d\n", mapaddr, mapaddr + mapsize); + break; + case MAPCMD_FILENAME: + get_next_string(parse_line, cur_cmd, &str_pos, ' '); + strcpy(mapfile, cur_cmd); + //printf("File! %s\n", mapfile); + break; + case MAPCMD_MAP_ID: + get_next_string(parse_line, cur_cmd, &str_pos, ' '); + strcpy(mapid, cur_cmd); + //printf("File! %s\n", mapfile); + break; + case MAPCMD_OVL_REMAP: + get_next_string(parse_line, cur_cmd, &str_pos, ' '); + mirraddr = get_int(cur_cmd); + break; + default: + printf("Unknown/unhandled map argument %s on line %d.\n", cur_cmd, cur_line); + break; + } + } + add_mapping(cfg, maptype, mapaddr, mapsize, mirraddr, mapfile, mapid); + + break; + } + case CONFITEM_LOOPCYCLES: + cfg->loop_cycles = get_int(parse_line + str_pos); + printf("Set CPU loop cycles to %d.\n", cfg->loop_cycles); + break; + case CONFITEM_MOUSE: + get_next_string(parse_line, cur_cmd, &str_pos, ' '); + cfg->mouse_file = (char *)calloc(1, strlen(cur_cmd) + 1); + strcpy(cfg->mouse_file, cur_cmd); + get_next_string(parse_line, cur_cmd, &str_pos, ' '); + cfg->mouse_toggle_key = cur_cmd[0]; + cfg->mouse_enabled = 1; + printf("Enabled mouse event forwarding from file %s, toggle key %c.\n", cfg->mouse_file, cfg->mouse_toggle_key); + break; + case CONFITEM_KEYBOARD: + get_next_string(parse_line, cur_cmd, &str_pos, ' '); + cfg->keyboard_toggle_key = cur_cmd[0]; + printf("Enabled keyboard event forwarding, toggle key %c.\n", cfg->keyboard_toggle_key); + break; + case CONFITEM_NONE: + default: + printf("Unknown config item %s on line %d.\n", cur_cmd, cur_line); + break; + } + + skip_line:; + cur_line++; + } + goto load_successful; + + load_failed:; + if (cfg) { + for (int i = 0; i < MAX_NUM_MAPPED_ITEMS; i++) { + if (cfg->map_data[i]) + free(cfg->map_data[i]); + cfg->map_data[i] = NULL; + } + free(cfg); + cfg = NULL; + } + load_successful:; + if (parse_line) + free(parse_line); + + return cfg; +} diff --git a/config_file/config_file.h b/config_file/config_file.h new file mode 100644 index 0000000..6c56a68 --- /dev/null +++ b/config_file/config_file.h @@ -0,0 +1,70 @@ +#include "../m68k.h" + +#define MAX_NUM_MAPPED_ITEMS 8 +#define SIZE_KILO 1024 +#define SIZE_MEGA (1024 * 1024) +#define SIZE_GIGA (1024 * 1024 * 1024) + +typedef enum { + MAPTYPE_NONE, + MAPTYPE_ROM, + MAPTYPE_RAM, + MAPTYPE_REGISTER, + MAPTYPE_NUM, +} map_types; + +typedef enum { + MAPCMD_UNKNOWN, + MAPCMD_TYPE, + MAPCMD_ADDRESS, + MAPCMD_SIZE, + MAPCMD_RANGE, + MAPCMD_FILENAME, + MAPCMD_OVL_REMAP, + MAPCMD_MAP_ID, + MAPCMD_NUM, +} map_cmds; + +typedef enum { + CONFITEM_NONE, + CONFITEM_CPUTYPE, + CONFITEM_MAP, + CONFITEM_LOOPCYCLES, + CONFITEM_MOUSE, + CONFITEM_KEYBOARD, + CONFITEM_NUM, +} config_items; + +typedef enum { + OP_TYPE_BYTE, + OP_TYPE_WORD, + OP_TYPE_LONGWORD, + OP_TYPE_MEM, + OP_TYPE_NUM, +} map_op_types; + +struct emulator_config { + unsigned int cpu_type; + + unsigned char map_type[MAX_NUM_MAPPED_ITEMS]; + long map_offset[MAX_NUM_MAPPED_ITEMS]; + unsigned int map_size[MAX_NUM_MAPPED_ITEMS]; + unsigned char *map_data[MAX_NUM_MAPPED_ITEMS]; + int map_mirror[MAX_NUM_MAPPED_ITEMS]; + char *map_id[MAX_NUM_MAPPED_ITEMS]; + + char *mouse_file; + + char mouse_toggle_key, keyboard_toggle_key; + unsigned char mouse_enabled, keyboard_enabled; + + unsigned int loop_cycles; +}; + +unsigned int get_m68k_cpu_type(char *name); +struct emulator_config *load_config_file(char *filename); + +int handle_mapped_read(struct emulator_config *cfg, unsigned int addr, unsigned int *val, unsigned char type, unsigned char mirror); +int handle_mapped_write(struct emulator_config *cfg, unsigned int addr, unsigned int value, unsigned char type, unsigned char mirror); +int handle_register_read(unsigned int addr, unsigned char type, unsigned int *val); +int handle_register_write(unsigned int addr, unsigned int value, unsigned char type); diff --git a/default.cfg b/default.cfg new file mode 100644 index 0000000..fd8a3fc --- /dev/null +++ b/default.cfg @@ -0,0 +1,19 @@ +# Sets CPU type. Valid types are (probably) 68000, 68010, 68020, 68EC020, 68030, 68EC030, 68040, 68EC040, 68LC040 and some STTTT thing. +cpu 68020 +# Map 512KB kickstart ROM to default offset. +map type=rom address=0xF80000 size=0x80000 file=kick512.rom ovl=0 +# This is for mapping a 256KB kickstart ROM. I can probably add some additional thing about kicking this file into low/high area. +#map type=rom address=0xFC0000 size=0x40000 file=kick256.rom ovl=0 +# Want to map an extended ROM, such as CDTV or CD32? +#map type=rom address=0xF00000 size=0x90000 file=cdtv.rom +# Map 256MB of Fast RAM at 0x8000000. +map type=ram address=0x08000000 size=128M +# Map Gayle as a register range. +map type=register address=0xD80000 size=0x70000 +# Number of instructions to run every main loop. +loopcycles 300 +# Forward mouse events to host system, defaults to off unless toggle key is pressed on the Pi. +# Syntax is mouse [device] [toggle key] +#mouse /dev/input/mouse0 m +# Forward keyboard events to host system, defaults to off unless toggle key is pressed, toggled off using F12. +#keyboard k diff --git a/emulator.c b/emulator.c index a508e03..dbd4096 100644 --- a/emulator.c +++ b/emulator.c @@ -13,10 +13,13 @@ #include #include #include +#include #include "Gayle.h" #include "ide.h" #include "m68k.h" #include "main.h" +#include "config_file/config_file.h" +#include "input/input.h" //#define BCM2708_PERI_BASE 0x20000000 //pi0-1 //#define BCM2708_PERI_BASE 0xFE000000 //pi4 @@ -71,15 +74,32 @@ #define GAYLEBASE 0xD80000 // D7FFFF #define GAYLESIZE 0x6FFFF +#define JOY0DAT 0xDFF00A +#define JOY1DAT 0xDFF00C +#define CIAAPRA 0xBFE001 +#define POTGOR 0xDFF016 + +int kb_hook_enabled = 0; +int mouse_hook_enabled = 0; +int cpu_emulation_running = 1; + +char mouse_dx = 0, mouse_dy = 0; +char mouse_buttons = 0; + #define KICKBASE 0xF80000 #define KICKSIZE 0x7FFFF -int mem_fd; +int mem_fd, mouse_fd = -1; int mem_fd_gpclk; int gayle_emulation_enabled = 1; void *gpio_map; void *gpclk_map; +// Configurable emulator options +unsigned int cpu_type = M68K_CPU_TYPE_68000; +unsigned int loop_cycles = 300; +struct emulator_config *cfg = NULL; + // I/O access volatile unsigned int *gpio; volatile unsigned int *gpclk; @@ -126,14 +146,23 @@ volatile uint16_t srdata; volatile uint32_t srdata2; volatile uint32_t srdata2_old; -unsigned char g_kick[524288]; -unsigned char g_ram[FASTSIZE + 1]; /* RAM */ +//unsigned char g_kick[524288]; +//unsigned char g_ram[FASTSIZE + 1]; /* RAM */ unsigned char toggle; static volatile unsigned char ovl; static volatile unsigned char maprom; void sigint_handler(int sig_num) { - printf("\n Exit Ctrl+C %d\n", sig_num); + //if (sig_num) { } + //cpu_emulation_running = 0; + + //return; + printf("Received sigint %d, exiting.\n", sig_num); + if (mouse_fd != -1) + close(mouse_fd); + if (mem_fd) + close(mem_fd); + exit(0); } @@ -142,12 +171,12 @@ void *iplThread(void *args) { while (42) { - if (GET_GPIO(1) == 0){ - toggle = 1; + if (GET_GPIO(1) == 0) { + toggle = 1; m68k_end_timeslice(); - //printf("thread!/n"); + //printf("thread!/n"); } else { - toggle = 0; + toggle = 0; }; usleep(1); } @@ -163,6 +192,49 @@ int main(int argc, char *argv[]) { if (strcmp(argv[g], "--disable-gayle") == 0) { gayle_emulation_enabled = 0; } + else if (strcmp(argv[g], "--cpu_type") == 0 || strcmp(argv[g], "--cpu") == 0) { + if (g + 1 >= argc) { + printf("%s switch found, but no CPU type specified.\n", argv[g]); + } else { + g++; + cpu_type = get_m68k_cpu_type(argv[g]); + } + } + else if (strcmp(argv[g], "--config-file") == 0 || strcmp(argv[g], "--config") == 0) { + if (g + 1 >= argc) { + printf("%s switch found, but no config filename specified.\n", argv[g]); + } else { + g++; + cfg = load_config_file(argv[g]); + } + } + } + + if (!cfg) { + printf("No config file specified. Trying to load default.cfg...\n"); + cfg = load_config_file("default.cfg"); + if (!cfg) { + printf("Couldn't load default.cfg, empty emulator config will be used.\n"); + cfg = (struct emulator_config *)calloc(1, sizeof(struct emulator_config)); + if (!cfg) { + printf("Failed to allocate memory for emulator config!\n"); + return 1; + } + memset(cfg, 0x00, sizeof(struct emulator_config)); + } + } + + if (cfg) { + if (cfg->cpu_type) cpu_type = cfg->cpu_type; + if (cfg->loop_cycles) loop_cycles = cfg->loop_cycles; + } + + if (cfg->mouse_enabled) { + mouse_fd = open(cfg->mouse_file, O_RDONLY | O_NONBLOCK); + if (mouse_fd == -1) { + printf("Failed to open %s, can't enable mouse hook.\n", cfg->mouse_file); + cfg->mouse_enabled = 0; + } } sched_setscheduler(0, SCHED_FIFO, &priority); @@ -173,6 +245,8 @@ int main(int argc, char *argv[]) { signal(SIGINT, sigint_handler); setup_io(); + //goto skip_everything; + // Enable 200MHz CLK output on GPIO4, adjust divider and pll source depending // on pi model printf("Enable 200MHz GPCLK0 on GPIO4\n"); @@ -246,28 +320,8 @@ int main(int argc, char *argv[]) { write_reg(0x00); usleep(100); - // load kick.rom if present - maprom = 1; - int fd = 0; - fd = open("kick.rom", O_RDONLY); - if (fd < 1) { - printf("Failed loading kick.rom, using motherboard kickstart\n"); - maprom = 0; - } else { - int size = (int)lseek(fd, 0, SEEK_END); - if (size == 0x40000) { - lseek(fd, 0, SEEK_SET); - read(fd, &g_kick, size); - lseek(fd, 0, SEEK_SET); - read(fd, &g_kick[0x40000], size); - } else { - lseek(fd, 0, SEEK_SET); - read(fd, &g_kick, size); - } - printf("Loaded kick.rom with size %d kib\n", size / 1024); - } - // reset amiga and statemachine + skip_everything:; cpu_pulse_reset(); ovl = 1; m68k_write_memory_8(0xbfe201, 0x0001); // AMIGA OVL @@ -276,7 +330,8 @@ int main(int argc, char *argv[]) { usleep(1500); m68k_init(); - m68k_set_cpu_type(M68K_CPU_TYPE_68020); + printf("Setting CPU type to %d.\n", cpu_type); + m68k_set_cpu_type(cpu_type); m68k_pulse_reset(); if (maprom == 1) { @@ -297,8 +352,45 @@ int main(int argc, char *argv[]) { m68k_pulse_reset(); while (42) { + if (mouse_hook_enabled) { + if (get_mouse_status(&mouse_dx, &mouse_dy, &mouse_buttons)) { + //printf("Maus: %d (%.2X), %d (%.2X), B:%.2X\n", mouse_dx, mouse_dx, mouse_dy, mouse_dy, mouse_buttons); + } + } - m68k_execute(300); + if (cpu_emulation_running) + m68k_execute(loop_cycles); + + // FIXME: Rework this to use keyboard events instead. + /*while (kbhit()) { + char c = getchar(); + if (c == cfg->keyboard_toggle_key && !kb_hook_enabled) { + kb_hook_enabled = 1; + printf("Keyboard hook enabled.\n"); + } + else if (c == 0x1B && kb_hook_enabled) { + kb_hook_enabled = 0; + printf("Keyboard hook disabled.\n"); + } + if (c == cfg->mouse_toggle_key) { + mouse_hook_enabled ^= 1; + printf("Mouse hook %s.\n", mouse_hook_enabled ? "enabled" : "disabled"); + mouse_dx = mouse_dy = mouse_buttons = 0; + } + if (c == 'r') { + cpu_emulation_running ^= 1; + printf("CPU emulation is now %s\n", cpu_emulation_running ? "running" : "stopped"); + } + if (c == 'R') { + cpu_pulse_reset(); + m68k_pulse_reset(); + printf("CPU emulation reset.\n"); + } + if (c == 'q') { + printf("Quitting and exiting emulator.\n"); + goto stop_cpu_emulation; + } + }*/ /* if (toggle == 1){ srdata = read_reg(); @@ -310,19 +402,27 @@ int main(int argc, char *argv[]) { */ - if (GET_GPIO(1) == 0){ + if (GET_GPIO(1) == 0) { srdata = read_reg(); m68k_set_irq((srdata >> 13) & 0xff); } else { - if (CheckIrq() == 1){ + if (CheckIrq() == 1) { write16(0xdff09c, 0x8008); - m68k_set_irq(2);} + m68k_set_irq(2); + } else m68k_set_irq(0); }; } + stop_cpu_emulation:; + + if (mouse_fd != -1) + close(mouse_fd); + if (mem_fd) + close(mem_fd); + return 0; } @@ -339,21 +439,13 @@ int cpu_irq_ack(int level) { return level; } +static unsigned int target = 0; + unsigned int m68k_read_memory_8(unsigned int address) { - if (address > FASTBASE && address < FASTBASE + FASTSIZE) { - return g_ram[address - FASTBASE]; - } - - if (maprom == 1) { - if (address > KICKBASE && address < KICKBASE + KICKSIZE) { - return g_kick[address - KICKBASE]; - } - } - - if (gayle_emulation_enabled) { - if (address > GAYLEBASE && address < GAYLEBASE + GAYLESIZE) { - return readGayleB(address); - } + if (cfg) { + int ret = handle_mapped_read(cfg, address, &target, OP_TYPE_BYTE, ovl); + if (ret != -1) + return target; } address &=0xFFFFFF; @@ -365,19 +457,36 @@ unsigned int m68k_read_memory_8(unsigned int address) { } unsigned int m68k_read_memory_16(unsigned int address) { - if (address > FASTBASE && address < FASTBASE + FASTSIZE) { - return be16toh(*(uint16_t *)&g_ram[address - FASTBASE]); + if (cfg) { + int ret = handle_mapped_read(cfg, address, &target, OP_TYPE_WORD, ovl); + if (ret != -1) + return target; } - if (maprom == 1) { - if (address > KICKBASE && address < KICKBASE + KICKSIZE) { - return be16toh(*(uint16_t *)&g_kick[address - KICKBASE]); + if (mouse_hook_enabled) { + if (address == JOY0DAT) { + // Forward mouse valueses to Amyga. + unsigned short result = (mouse_dy << 8) | (mouse_dx); + mouse_dx = mouse_dy = 0; + return (unsigned int)result; } - } - - if (gayle_emulation_enabled) { - if (address > GAYLEBASE && address < GAYLEBASE + GAYLESIZE) { - return readGayle(address); + if (address == CIAAPRA) { + unsigned short result = (unsigned int)read16((uint32_t)address); + if (mouse_buttons & 0x01) { + mouse_buttons -= 1; + return (unsigned int)(result | 0x40); + } + else + return (unsigned int)result; + } + if (address == POTGOR) { + unsigned short result = (unsigned int)read16((uint32_t)address); + if (mouse_buttons & 0x02) { + mouse_buttons -= 2; + return (unsigned int)(result | 0x2); + } + else + return (unsigned int)result; } } @@ -390,20 +499,10 @@ unsigned int m68k_read_memory_16(unsigned int address) { } unsigned int m68k_read_memory_32(unsigned int address) { - if (address > FASTBASE && address < FASTBASE + FASTSIZE) { - return be32toh(*(uint32_t *)&g_ram[address - FASTBASE]); - } - - if (maprom == 1) { - if (address > KICKBASE && address < KICKBASE + KICKSIZE) { - return be32toh(*(uint32_t *)&g_kick[address - KICKBASE]); - } - } - - if (gayle_emulation_enabled) { - if (address > GAYLEBASE && address < GAYLEBASE + GAYLESIZE) { - return readGayleL(address); - } + if (cfg) { + int ret = handle_mapped_read(cfg, address, &target, OP_TYPE_LONGWORD, ovl); + if (ret != -1) + return target; } // if (address < 0xffffff) { @@ -417,23 +516,17 @@ unsigned int m68k_read_memory_32(unsigned int address) { } void m68k_write_memory_8(unsigned int address, unsigned int value) { - if (address > FASTBASE && address < FASTBASE + FASTSIZE) { - g_ram[address - FASTBASE] = value; - return; + if (cfg) { + int ret = handle_mapped_write(cfg, address, value, OP_TYPE_BYTE, ovl); + if (ret != -1) + return; } - if (gayle_emulation_enabled) { - if (address > GAYLEBASE && address < GAYLEBASE + GAYLESIZE) { - writeGayleB(address, value); - return; - } - } -/* if (address == 0xbfe001) { ovl = (value & (1 << 0)); printf("OVL:%x\n", ovl); } -*/ + // if (address < 0xffffff) { address &=0xFFFFFF; write8((uint32_t)address, value); @@ -444,16 +537,10 @@ void m68k_write_memory_8(unsigned int address, unsigned int value) { } void m68k_write_memory_16(unsigned int address, unsigned int value) { - if (address > FASTBASE && address < FASTBASE + FASTSIZE) { - *(uint16_t *)&g_ram[address - FASTBASE] = htobe16(value); - return; - } - - if (gayle_emulation_enabled) { - if (address > GAYLEBASE && address < GAYLEBASE + GAYLESIZE) { - writeGayle(address, value); + if (cfg) { + int ret = handle_mapped_write(cfg, address, value, OP_TYPE_WORD, ovl); + if (ret != -1) return; - } } // if (address < 0xffffff) { @@ -465,15 +552,10 @@ void m68k_write_memory_16(unsigned int address, unsigned int value) { } void m68k_write_memory_32(unsigned int address, unsigned int value) { - if (address > FASTBASE && address < FASTBASE + FASTSIZE) { - *(uint32_t *)&g_ram[address - FASTBASE] = htobe32(value); - return; - } - - if (gayle_emulation_enabled) { - if (address > GAYLEBASE && address < GAYLEBASE + GAYLESIZE) { - writeGayleL(address, value); - } + if (cfg) { + int ret = handle_mapped_write(cfg, address, value, OP_TYPE_LONGWORD, ovl); + if (ret != -1) + return; } // if (address < 0xffffff) { diff --git a/input/input.c b/input/input.c new file mode 100644 index 0000000..b0274e3 --- /dev/null +++ b/input/input.c @@ -0,0 +1,22 @@ +#include +#include +#include + +int kbhit() +{ + return 0; +} + +extern int mouse_fd; + +int get_mouse_status(char *x, char *y, char *b) { + struct input_event ie; + if (read(mouse_fd, &ie, sizeof(struct input_event)) != -1) { + *b = ((char *)&ie)[0]; + *x = ((char *)&ie)[1]; + *y = ((char *)&ie)[2]; + return 1; + } + + return 0; +} diff --git a/input/input.h b/input/input.h new file mode 100644 index 0000000..b6565bf --- /dev/null +++ b/input/input.h @@ -0,0 +1,2 @@ +int get_mouse_status(char *x, char *y, char *b); +int kbhit(); diff --git a/memory_mapped.c b/memory_mapped.c new file mode 100644 index 0000000..c5a99e7 --- /dev/null +++ b/memory_mapped.c @@ -0,0 +1,141 @@ +#include "config_file/config_file.h" +#include "m68k.h" +#include "Gayle.h" +#include + +#define CHKRANGE(a, b, c) a >= (unsigned int)b && a < (unsigned int)(b + c) + +static unsigned int target; + +extern const char *map_type_names[MAPTYPE_NUM]; +const char *op_type_names[OP_TYPE_NUM] = { + "BYTE", + "WORD", + "LONGWORD", + "MEM", +}; + +int handle_mapped_read(struct emulator_config *cfg, unsigned int addr, unsigned int *val, unsigned char type, unsigned char mirror) { + unsigned char *read_addr = NULL; + char handle_regs = 0; + + //printf("Mapped read: %.8x\n", addr); + + for (int i = 0; i < MAX_NUM_MAPPED_ITEMS; i++) { + if (cfg->map_type[i] == MAPTYPE_NONE) + continue; + switch(cfg->map_type[i]) { + case MAPTYPE_ROM: + if (CHKRANGE(addr, cfg->map_offset[i], cfg->map_size[i])) + read_addr = cfg->map_data[i] + (addr - cfg->map_offset[i]); + else if (cfg->map_mirror[i] != -1 && mirror && CHKRANGE(addr, cfg->map_mirror[i], cfg->map_size[i])) + read_addr = cfg->map_data[i] + (addr - cfg->map_mirror[i]); + break; + case MAPTYPE_RAM: + if (CHKRANGE(addr, cfg->map_offset[i], cfg->map_size[i])) + read_addr = cfg->map_data[i] + (addr - cfg->map_offset[i]); + break; + case MAPTYPE_REGISTER: + if (CHKRANGE(addr, cfg->map_offset[i], cfg->map_size[i])) + handle_regs = 1; + break; + } + + if (!read_addr && !handle_regs) + continue; + + if (handle_regs) { + if (handle_register_read(addr, type, &target) != -1) { + *val = target; + return 1; + } + return -1; + } + else if (read_addr) { + //printf("[PC: %.8X] Read %s from %s (%.8X) (%d)\n", m68k_get_reg(NULL, M68K_REG_PC), op_type_names[type], map_type_names[cfg->map_type[i]], addr, mirror); + //printf("Readaddr: %.8lX (Base %.8lX\n", (uint64_t)(read_addr), (uint64_t)cfg->map_data[i]); + switch(type) { + case OP_TYPE_BYTE: + *val = read_addr[0]; + //printf("Read val: %.8lX (%d)\n", (uint64_t)val, *val); + return 1; + break; + case OP_TYPE_WORD: + *val = be16toh(((unsigned short *)read_addr)[0]); + //printf("Read val: %.8lX (%d)\n", (uint64_t)val, *val); + return 1; + break; + case OP_TYPE_LONGWORD: + *val = be32toh(((unsigned int *)read_addr)[0]); + //printf("Read val: %.8lX (%d)\n", (uint64_t)val, *val); + return 1; + break; + case OP_TYPE_MEM: + return -1; + break; + } + } + } + + return -1; +} + +int handle_mapped_write(struct emulator_config *cfg, unsigned int addr, unsigned int value, unsigned char type, unsigned char mirror) { + unsigned char *write_addr = NULL; + char handle_regs = 0; + + //printf("Mapped write: %.8x\n", addr); + if (mirror) { } + + for (int i = 0; i < MAX_NUM_MAPPED_ITEMS; i++) { + if (cfg->map_type[i] == MAPTYPE_NONE) + continue; + switch(cfg->map_type[i]) { + case MAPTYPE_ROM: + if (CHKRANGE(addr, cfg->map_offset[i], cfg->map_size[i])) + return 1; + break; + case MAPTYPE_RAM: + if (CHKRANGE(addr, cfg->map_offset[i], cfg->map_size[i])) + write_addr = cfg->map_data[i] + (addr - cfg->map_offset[i]); + break; + case MAPTYPE_REGISTER: + if (CHKRANGE(addr, cfg->map_offset[i], cfg->map_size[i])) + handle_regs = 1; + break; + } + + if (!write_addr && !handle_regs) + continue; + + if (handle_regs) { + return handle_register_write(addr, value, type); + } + else if (write_addr) { + //printf("[PC: %.8X] Write %s to %s (%.8X) (%d)\n", m68k_get_reg(NULL, M68K_REG_PC), op_type_names[type], map_type_names[cfg->map_type[i]], addr, mirror); + //printf("Writeaddr: %.8lX (Base %.8lX\n", (uint64_t)(write_addr), (uint64_t)cfg->map_data[i]); + switch(type) { + case OP_TYPE_BYTE: + write_addr[0] = (unsigned char)value; + //printf("Write val: %.8X (%d)\n", (uint32_t)value, value); + return 1; + break; + case OP_TYPE_WORD: + ((short *)write_addr)[0] = htobe16(value); + //printf("Write val: %.8X (%d)\n", (uint32_t)value, value); + return 1; + break; + case OP_TYPE_LONGWORD: + ((int *)write_addr)[0] = htobe32(value); + //printf("Write val: %.8X (%d)\n", (uint32_t)value, value); + return 1; + break; + case OP_TYPE_MEM: + return -1; + break; + } + } + } + + return -1; +} diff --git a/registers/registers_amiga.c b/registers/registers_amiga.c new file mode 100644 index 0000000..62e4255 --- /dev/null +++ b/registers/registers_amiga.c @@ -0,0 +1,51 @@ +#include "../Gayle.h" +#include "../config_file/config_file.h" + +#define GAYLEBASE 0xD80000 // D7FFFF +#define GAYLESIZE 0x6FFFF + +int handle_register_read(unsigned int addr, unsigned char type, unsigned int *val) { + if (addr > GAYLEBASE && addr < GAYLEBASE + GAYLESIZE) { + switch(type) { + case OP_TYPE_BYTE: + *val = readGayleB(addr); + return 1; + break; + case OP_TYPE_WORD: + *val = readGayle(addr); + return 1; + break; + case OP_TYPE_LONGWORD: + *val = readGayleL(addr); + return 1; + break; + case OP_TYPE_MEM: + return -1; + break; + } + } + return -1; +} + +int handle_register_write(unsigned int addr, unsigned int value, unsigned char type) { + if (addr > GAYLEBASE && addr < GAYLEBASE + GAYLESIZE) { + switch(type) { + case OP_TYPE_BYTE: + writeGayleB(addr, value); + return 1; + break; + case OP_TYPE_WORD: + writeGayle(addr, value); + return 1; + break; + case OP_TYPE_LONGWORD: + writeGayleL(addr, value); + return 1; + break; + case OP_TYPE_MEM: + return -1; + break; + } + } + return -1; +} diff --git a/registers/registers_dummy.c b/registers/registers_dummy.c new file mode 100644 index 0000000..e00159c --- /dev/null +++ b/registers/registers_dummy.c @@ -0,0 +1,7 @@ +int handle_register_read(unsigned int addr, unsigned char type) { + return -1; +} + +int handle_register_write(unsigned int addr, unsigned char type) { + return -1; +} diff --git a/test.cfg b/test.cfg new file mode 100644 index 0000000..2a9ad0b --- /dev/null +++ b/test.cfg @@ -0,0 +1,11 @@ +cpu 68000 +#map type=rom address=0xF80000 size=0x80000 file=kick512.rom ovl=0 +#map type=rom address=0xF00000 size=0x90000 file=cdtv.rom +# Map 256MB of Fast RAM at 0x8000000. +#map type=ram address=0x08000000 size=256M +# Map Gayle as a register range. +#map type=register address=0xD80000 size=0x70000 +# Number of instructions to run every main loop. +loopcycles 300 +mouse /dev/input/mouse0 m +keyboard k diff --git a/x68k.cfg b/x68k.cfg new file mode 100644 index 0000000..122416d --- /dev/null +++ b/x68k.cfg @@ -0,0 +1,17 @@ +# Sets CPU type. Valid types are (probably) 68000, 68010, 68020, 68EC020, 68030, 68EC030, 68040, 68EC040, 68LC040 and some STTTT thing. +cpu 68000 + +# Various ROM locations +#map type=rom address=0xF00000 file=cgrom +#map type=rom address=0xFC0000 file=scsiin +#map type=rom address=0xFE0000 file=ipl ovl=0 + +# 10MB of expanded RAM, for machines with 2MB internal. +map type=ram address=2M size=10M +# 11MB of expanded RAM, for machines with 1MB internal. +#map type=ram address=1M size=11M + +# Map Gayle as a register range. +#map type=register address=0xD80000 size=0x70000 +# Number of instructions to run every main loop. +loopcycles 60