X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=emulator.c;h=eb8f8f570e420b87ff0c796281701c641744bb63;hb=HEAD;hp=a8985412fcaa20f16d0956c0f55d7a2a22e6de0f;hpb=0eb7deffb62e5153425c4931ec9d4c8c068c7feb;p=pistorm diff --git a/emulator.c b/emulator.c index a898541..eb8f8f5 100644 --- a/emulator.c +++ b/emulator.c @@ -1,7 +1,28 @@ +// SPDX-License-Identifier: MIT + +#include "m68k.h" +#include "emulator.h" +#include "platforms/platforms.h" +#include "input/input.h" +#include "m68kcpu.h" + +#include "platforms/amiga/Gayle.h" +#include "platforms/amiga/amiga-registers.h" +#include "platforms/amiga/rtg/rtg.h" +#include "platforms/amiga/hunk-reloc.h" +#include "platforms/amiga/piscsi/piscsi.h" +#include "platforms/amiga/piscsi/piscsi-enums.h" +#include "platforms/amiga/net/pi-net.h" +#include "platforms/amiga/net/pi-net-enums.h" +#include "platforms/amiga/pistorm-dev/pistorm-dev.h" +#include "platforms/amiga/pistorm-dev/pistorm-dev-enums.h" +#include "gpio/ps_protocol.h" + #include #include #include #include +#include #include #include #include @@ -9,150 +30,404 @@ #include #include #include +#include #include #include #include #include -#include -#include "Gayle.h" -#include "ide.h" -#include "m68k.h" -#include "main.h" -#include "platforms/platforms.h" -#include "input/input.h" - -#include "platforms/amiga/amiga-registers.h" -//#define BCM2708_PERI_BASE 0x20000000 //pi0-1 -//#define BCM2708_PERI_BASE 0xFE000000 //pi4 -#define BCM2708_PERI_BASE 0x3F000000 // pi3 -#define BCM2708_PERI_SIZE 0x01000000 -#define GPIO_BASE (BCM2708_PERI_BASE + 0x200000) /* GPIO controller */ -#define GPCLK_BASE (BCM2708_PERI_BASE + 0x101000) -#define GPIO_ADDR 0x200000 /* GPIO controller */ -#define GPCLK_ADDR 0x101000 -#define CLK_PASSWD 0x5a000000 -#define CLK_GP0_CTL 0x070 -#define CLK_GP0_DIV 0x074 - -#define SA0 5 -#define SA1 3 -#define SA2 2 - -#define STATUSREGADDR \ - GPIO_CLR = 1 << SA0; \ - GPIO_CLR = 1 << SA1; \ - GPIO_SET = 1 << SA2; -#define W16 \ - GPIO_CLR = 1 << SA0; \ - GPIO_CLR = 1 << SA1; \ - GPIO_CLR = 1 << SA2; -#define R16 \ - GPIO_SET = 1 << SA0; \ - GPIO_CLR = 1 << SA1; \ - GPIO_CLR = 1 << SA2; -#define W8 \ - GPIO_CLR = 1 << SA0; \ - GPIO_SET = 1 << SA1; \ - GPIO_CLR = 1 << SA2; -#define R8 \ - GPIO_SET = 1 << SA0; \ - GPIO_SET = 1 << SA1; \ - GPIO_CLR = 1 << SA2; - -#define PAGE_SIZE (4 * 1024) -#define BLOCK_SIZE (4 * 1024) - -#define GPIOSET(no, ishigh) \ - do { \ - if (ishigh) \ - set |= (1 << (no)); \ - else \ - reset |= (1 << (no)); \ - } while (0) - -#define FASTBASE 0x07FFFFFF -#define FASTSIZE 0xFFFFFFF -#define GAYLEBASE 0xD80000 // D7FFFF -#define GAYLESIZE 0x6FFFF - -#define JOY0DAT 0xDFF00A -#define JOY1DAT 0xDFF00C -#define CIAAPRA 0xBFE001 -#define POTGOR 0xDFF016 +#define KEY_POLL_INTERVAL_MSEC 5000 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; +uint8_t mouse_dx = 0, mouse_dy = 0; +uint8_t mouse_buttons = 0; +uint8_t mouse_extra = 0; + +extern uint8_t gayle_int; +extern uint8_t gayle_ide_enabled; +extern uint8_t gayle_emulation_enabled; +extern uint8_t gayle_a4k_int; +extern volatile unsigned int *gpio; +extern volatile uint16_t srdata; +extern uint8_t realtime_graphics_debug, emulator_exiting; +extern uint8_t rtg_on; +uint8_t realtime_disassembly, int2_enabled = 0; +uint32_t do_disasm = 0, old_level; +uint32_t last_irq = 8, last_last_irq = 8; + +uint8_t end_signal = 0, load_new_config = 0; + +char disasm_buf[4096]; #define KICKBASE 0xF80000 #define KICKSIZE 0x7FFFF int mem_fd, mouse_fd = -1, keyboard_fd = -1; int mem_fd_gpclk; -int gayle_emulation_enabled = 1; -void *gpio_map; -void *gpclk_map; +int irq; +int gayleirq; + +#define MUSASHI_HAX + +#ifdef MUSASHI_HAX +#include "m68kcpu.h" +extern m68ki_cpu_core m68ki_cpu; +extern int m68ki_initial_cycles; +extern int m68ki_remaining_cycles; + +#define M68K_SET_IRQ(i) old_level = CPU_INT_LEVEL; \ + CPU_INT_LEVEL = (i << 8); \ + if(old_level != 0x0700 && CPU_INT_LEVEL == 0x0700) \ + m68ki_cpu.nmi_pending = TRUE; +#define M68K_END_TIMESLICE m68ki_initial_cycles = GET_CYCLES(); \ + SET_CYCLES(0); +#else +#define M68K_SET_IRQ m68k_set_irq +#define M68K_END_TIMESLICE m68k_end_timeslice() +#endif + +#define NOP asm("nop"); asm("nop"); asm("nop"); asm("nop"); +#define MEMORY_BARRIER() __sync_synchronize() + +#define DEBUG_EMULATOR +#ifdef DEBUG_EMULATOR +#define DEBUG printf +#else +#define DEBUG(...) +#endif // Configurable emulator options unsigned int cpu_type = M68K_CPU_TYPE_68000; -unsigned int loop_cycles = 300; +unsigned int loop_cycles = 300, irq_status = 0; struct emulator_config *cfg = NULL; -char keyboard_file[256] = "/dev/input/event0"; - -// I/O access -volatile unsigned int *gpio; -volatile unsigned int *gpclk; -volatile unsigned int gpfsel0; -volatile unsigned int gpfsel1; -volatile unsigned int gpfsel2; -volatile unsigned int gpfsel0_o; -volatile unsigned int gpfsel1_o; -volatile unsigned int gpfsel2_o; - -// GPIO setup macros. Always use INP_GPIO(x) before using OUT_GPIO(x) or -// SET_GPIO_ALT(x,y) -#define INP_GPIO(g) *(gpio + ((g) / 10)) &= ~(7 << (((g) % 10) * 3)) -#define OUT_GPIO(g) *(gpio + ((g) / 10)) |= (1 << (((g) % 10) * 3)) -#define SET_GPIO_ALT(g, a) \ - *(gpio + (((g) / 10))) |= \ - (((a) <= 3 ? (a) + 4 : (a) == 4 ? 3 : 2) << (((g) % 10) * 3)) - -#define GPIO_SET \ - *(gpio + 7) // sets bits which are 1 ignores bits which are 0 -#define GPIO_CLR \ - *(gpio + 10) // clears bits which are 1 ignores bits which are 0 - -#define GET_GPIO(g) (*(gpio + 13) & (1 << g)) // 0 if LOW, (1<drive[0].intrq || get_ide(0)->drive[1].intrq)) { + //get_ide(0)->drive[0].intrq = 0; + gayleirq = 1; + M68K_END_TIMESLICE; + } + else + gayleirq = 0; + }*/ + +noppers: + NOP NOP NOP NOP NOP NOP NOP NOP + //NOP NOP NOP NOP NOP NOP NOP NOP + //NOP NOP NOP NOP NOP NOP NOP NOP + /*NOP NOP NOP NOP NOP NOP NOP NOP + NOP NOP NOP NOP NOP NOP NOP NOP + NOP NOP NOP NOP NOP NOP NOP NOP*/ + } + return args; +} + +static inline unsigned int inline_read_status_reg() { + *(gpio + 7) = (REG_STATUS << PIN_A0); + *(gpio + 7) = 1 << PIN_RD; + *(gpio + 7) = 1 << PIN_RD; + *(gpio + 7) = 1 << PIN_RD; + *(gpio + 7) = 1 << PIN_RD; + + unsigned int value = *(gpio + 13); + + *(gpio + 10) = 0xffffec; + + return (value >> 8) & 0xffff; +} + +void *cpu_task() { + m68ki_cpu_core *state = &m68ki_cpu; + m68k_pulse_reset(state); + +cpu_loop: + if (mouse_hook_enabled) { + get_mouse_status(&mouse_dx, &mouse_dy, &mouse_buttons, &mouse_extra); + } + + if (realtime_disassembly && (do_disasm || cpu_emulation_running)) { + m68k_disassemble(disasm_buf, m68k_get_reg(NULL, M68K_REG_PC), cpu_type); + printf("REGA: 0:$%.8X 1:$%.8X 2:$%.8X 3:$%.8X 4:$%.8X 5:$%.8X 6:$%.8X 7:$%.8X\n", m68k_get_reg(NULL, M68K_REG_A0), m68k_get_reg(NULL, M68K_REG_A1), m68k_get_reg(NULL, M68K_REG_A2), m68k_get_reg(NULL, M68K_REG_A3), \ + m68k_get_reg(NULL, M68K_REG_A4), m68k_get_reg(NULL, M68K_REG_A5), m68k_get_reg(NULL, M68K_REG_A6), m68k_get_reg(NULL, M68K_REG_A7)); + printf("REGD: 0:$%.8X 1:$%.8X 2:$%.8X 3:$%.8X 4:$%.8X 5:$%.8X 6:$%.8X 7:$%.8X\n", m68k_get_reg(NULL, M68K_REG_D0), m68k_get_reg(NULL, M68K_REG_D1), m68k_get_reg(NULL, M68K_REG_D2), m68k_get_reg(NULL, M68K_REG_D3), \ + m68k_get_reg(NULL, M68K_REG_D4), m68k_get_reg(NULL, M68K_REG_D5), m68k_get_reg(NULL, M68K_REG_D6), m68k_get_reg(NULL, M68K_REG_D7)); + printf("%.8X (%.8X)]] %s\n", m68k_get_reg(NULL, M68K_REG_PC), (m68k_get_reg(NULL, M68K_REG_PC) & 0xFFFFFF), disasm_buf); + if (do_disasm) + do_disasm--; + m68k_execute(state, 1); + } + else { + if (cpu_emulation_running) { + MEMORY_BARRIER(); + if (irq) + m68k_execute(state, 5); + else + m68k_execute(state, loop_cycles); + } + } + + MEMORY_BARRIER(); + while (irq) { + last_irq = ((inline_read_status_reg() & 0xe000) >> 13); + if (last_irq != 0 && last_irq != last_last_irq) { + last_last_irq = last_irq; + M68K_SET_IRQ(last_irq); + } + m68k_execute(state, 50); + MEMORY_BARRIER(); + } + + MEMORY_BARRIER(); + if (!irq && last_last_irq != 0) { + //M68K_SET_IRQ(0); + last_last_irq = 0; + } + + MEMORY_BARRIER(); + if (do_reset.value) { + cpu_pulse_reset(); + do_reset.value=0; + usleep(1000000); // 1sec + rtg_on=0; +// while(amiga_reset==0); +// printf("CPU emulation reset.\n"); + } + + if (mouse_hook_enabled && (mouse_extra != 0x00)) { + // mouse wheel events have occurred; unlike l/m/r buttons, these are queued as keypresses, so add to end of buffer + switch (mouse_extra) { + case 0xff: + // wheel up + queue_keypress(0xfe, KEYPRESS_PRESS, PLATFORM_AMIGA); + break; + case 0x01: + // wheel down + queue_keypress(0xff, KEYPRESS_PRESS, PLATFORM_AMIGA); + break; + } + + // dampen the scroll wheel until next while loop iteration + mouse_extra = 0x00; + } + + if (load_new_config) { + printf("[CPU] Loading new config file.\n"); + goto stop_cpu_emulation; + } + + if (end_signal) + goto stop_cpu_emulation; + + goto cpu_loop; + +stop_cpu_emulation: + printf("[CPU] End of CPU thread\n"); + return (void *)NULL; +} + +void *keyboard_task() { + struct pollfd kbdpoll[1]; + int kpollrc; + char c = 0, c_code = 0, c_type = 0; + char grab_message[] = "[KBD] Grabbing keyboard from input layer\n", + ungrab_message[] = "[KBD] Ungrabbing keyboard\n"; + + printf("[KBD] Keyboard thread started\n"); + + // because we permit the keyboard to be grabbed on startup, quickly check if we need to grab it + if (kb_hook_enabled && cfg->keyboard_grab) { + printf(grab_message); + grab_device(keyboard_fd); + } + + kbdpoll[0].fd = keyboard_fd; + kbdpoll[0].events = POLLIN; + +key_loop: + kpollrc = poll(kbdpoll, 1, KEY_POLL_INTERVAL_MSEC); + if ((kpollrc > 0) && (kbdpoll[0].revents & POLLHUP)) { + // in the event that a keyboard is unplugged, keyboard_task will whiz up to 100% utilisation + // this is undesired, so if the keyboard HUPs, end the thread without ending the emulation + printf("[KBD] Keyboard node returned HUP (unplugged?)\n"); + goto key_end; + } + + // if kpollrc > 0 then it contains number of events to pull, also check if POLLIN is set in revents + if ((kpollrc <= 0) || !(kbdpoll[0].revents & POLLIN)) { + goto key_loop; + } + + while (get_key_char(&c, &c_code, &c_type)) { + if (c && c == cfg->keyboard_toggle_key && !kb_hook_enabled) { + kb_hook_enabled = 1; + printf("[KBD] Keyboard hook enabled.\n"); + if (cfg->keyboard_grab) { + grab_device(keyboard_fd); + printf(grab_message); + } + } else if (kb_hook_enabled) { + if (c == 0x1B && c_type) { + kb_hook_enabled = 0; + printf("[KBD] Keyboard hook disabled.\n"); + if (cfg->keyboard_grab) { + release_device(keyboard_fd); + printf(ungrab_message); + } + } else { + if (queue_keypress(c_code, c_type, cfg->platform->id) && int2_enabled && last_irq != 2) { + //last_irq = 0; + //M68K_SET_IRQ(2); + } + } + } + + // pause pressed; trigger nmi (int level 7) + if (c == 0x01 && c_type) { + printf("[INT] Sending NMI\n"); + M68K_SET_IRQ(7); + } + + if (!kb_hook_enabled && c_type) { + if (c && 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 = mouse_extra = 0; + } + if (c == 'r') { + cpu_emulation_running ^= 1; + printf("CPU emulation is now %s\n", cpu_emulation_running ? "running" : "stopped"); + } + if (c == 'g') { + realtime_graphics_debug ^= 1; + printf("Real time graphics debug is now %s\n", realtime_graphics_debug ? "on" : "off"); + } + if (c == 'R') { + cpu_pulse_reset(); + //m68k_pulse_reset(); + printf("CPU emulation reset.\n"); + } + if (c == 'q') { + printf("Quitting and exiting emulator.\n"); + end_signal = 1; + goto key_end; + } + if (c == 'd') { + realtime_disassembly ^= 1; + do_disasm = 1; + printf("Real time disassembly is now %s\n", realtime_disassembly ? "on" : "off"); + } + if (c == 'D') { + int r = get_mapped_item_by_address(cfg, 0x08000000); + if (r != -1) { + printf("Dumping first 16MB of mapped range %d.\n", r); + FILE *dmp = fopen("./memdmp.bin", "wb+"); + fwrite(cfg->map_data[r], 16 * SIZE_MEGA, 1, dmp); + fclose(dmp); + } + } + if (c == 's' && realtime_disassembly) { + do_disasm = 1; + } + if (c == 'S' && realtime_disassembly) { + do_disasm = 128; + } + } + } + + goto key_loop; + +key_end: + printf("[KBD] Keyboard thread ending\n"); + if (cfg->keyboard_grab) { + printf(ungrab_message); + release_device(keyboard_fd); + } + return (void*)NULL; +} + +void stop_cpu_emulation(uint8_t disasm_cur) { + M68K_END_TIMESLICE; + if (disasm_cur) { + m68k_disassemble(disasm_buf, m68k_get_reg(NULL, M68K_REG_PC), cpu_type); + printf("REGA: 0:$%.8X 1:$%.8X 2:$%.8X 3:$%.8X 4:$%.8X 5:$%.8X 6:$%.8X 7:$%.8X\n", m68k_get_reg(NULL, M68K_REG_A0), m68k_get_reg(NULL, M68K_REG_A1), m68k_get_reg(NULL, M68K_REG_A2), m68k_get_reg(NULL, M68K_REG_A3), \ + m68k_get_reg(NULL, M68K_REG_A4), m68k_get_reg(NULL, M68K_REG_A5), m68k_get_reg(NULL, M68K_REG_A6), m68k_get_reg(NULL, M68K_REG_A7)); + printf("REGD: 0:$%.8X 1:$%.8X 2:$%.8X 3:$%.8X 4:$%.8X 5:$%.8X 6:$%.8X 7:$%.8X\n", m68k_get_reg(NULL, M68K_REG_D0), m68k_get_reg(NULL, M68K_REG_D1), m68k_get_reg(NULL, M68K_REG_D2), m68k_get_reg(NULL, M68K_REG_D3), \ + m68k_get_reg(NULL, M68K_REG_D4), m68k_get_reg(NULL, M68K_REG_D5), m68k_get_reg(NULL, M68K_REG_D6), m68k_get_reg(NULL, M68K_REG_D7)); + printf("%.8X (%.8X)]] %s\n", m68k_get_reg(NULL, M68K_REG_PC), (m68k_get_reg(NULL, M68K_REG_PC) & 0xFFFFFF), disasm_buf); + realtime_disassembly = 1; + } + + cpu_emulation_running = 0; + do_disasm = 0; +} + +unsigned int ovl; static volatile unsigned char maprom; void sigint_handler(int sig_num) { @@ -166,36 +441,29 @@ void sigint_handler(int sig_num) { if (mem_fd) close(mem_fd); - exit(0); -} - -void *iplThread(void *args) { - printf("IPL thread running/n"); - - while (42) { + if (cfg->platform->shutdown) { + cfg->platform->shutdown(cfg); + } - if (GET_GPIO(1) == 0) { - toggle = 1; - m68k_end_timeslice(); - //printf("thread!/n"); - } else { - toggle = 0; - }; - usleep(1); + while (!emulator_exiting) { + emulator_exiting = 1; + usleep(0); } + + exit(0); } int main(int argc, char *argv[]) { int g; - const struct sched_param priority = {99}; + + ps_setup_protocol(); + + //const struct sched_param priority = {99}; // Some command line switch stuffles for (g = 1; g < argc; g++) { - 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 (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 { @@ -208,7 +476,14 @@ int main(int argc, char *argv[]) { printf("%s switch found, but no config filename specified.\n", argv[g]); } else { g++; - cfg = load_config_file(argv[g]); + FILE *chk = fopen(argv[g], "rb"); + if (chk == NULL) { + printf("Config file %s does not exist, please check that you've specified the path correctly.\n", argv[g]); + } else { + fclose(chk); + load_new_config = 1; + set_pistorm_devcfg_filename(argv[g]); + } } } else if (strcmp(argv[g], "--keyboard-file") == 0 || strcmp(argv[g], "--kbfile") == 0) { @@ -221,6 +496,33 @@ int main(int argc, char *argv[]) { } } +switch_config: + srand(clock()); + + ps_reset_state_machine(); + ps_pulse_reset(); + usleep(1500); + + if (load_new_config != 0) { + uint8_t config_action = load_new_config - 1; + load_new_config = 0; + if (cfg) { + free_config_file(cfg); + free(cfg); + cfg = NULL; + } + + switch(config_action) { + case PICFG_LOAD: + case PICFG_RELOAD: + cfg = load_config_file(get_pistorm_devcfg_filename()); + break; + case PICFG_DEFAULT: + cfg = load_config_file("default.cfg"); + break; + } + } + if (!cfg) { printf("No config file specified. Trying to load default.cfg...\n"); cfg = load_config_file("default.cfg"); @@ -245,215 +547,122 @@ int main(int argc, char *argv[]) { } if (cfg->mouse_enabled) { - mouse_fd = open(cfg->mouse_file, O_RDONLY | O_NONBLOCK); + mouse_fd = open(cfg->mouse_file, O_RDWR | O_NONBLOCK); if (mouse_fd == -1) { printf("Failed to open %s, can't enable mouse hook.\n", cfg->mouse_file); cfg->mouse_enabled = 0; + } else { + /** + * *-*-*-* magic numbers! *-*-*-* + * great, so waaaay back in the history of the pc, the ps/2 protocol set the standard for mice + * and in the process, the mouse sample rate was defined as a way of putting mice into vendor-specific modes. + * as the ancient gpm command explains, almost everything except incredibly old mice talk the IntelliMouse + * protocol, which reports four bytes. by default, every mouse starts in 3-byte mode (don't report wheel or + * additional buttons) until imps2 magic is sent. so, command $f3 is "set sample rate", followed by a byte. + */ + uint8_t mouse_init[] = { 0xf4, 0xf3, 0x64 }; // enable, then set sample rate 100 + uint8_t imps2_init[] = { 0xf3, 0xc8, 0xf3, 0x64, 0xf3, 0x50 }; // magic sequence; set sample 200, 100, 80 + if (write(mouse_fd, mouse_init, sizeof(mouse_init)) != -1) { + if (write(mouse_fd, imps2_init, sizeof(imps2_init)) == -1) + printf("[MOUSE] Couldn't enable scroll wheel events; is this mouse from the 1980s?\n"); + } else + printf("[MOUSE] Mouse didn't respond to normal PS/2 init; have you plugged a brick in by mistake?\n"); } } - keyboard_fd = open(keyboard_file, O_RDONLY | O_NONBLOCK); + if (cfg->keyboard_file) + keyboard_fd = open(cfg->keyboard_file, O_RDONLY | O_NONBLOCK); + else + keyboard_fd = open(keyboard_file, O_RDONLY | O_NONBLOCK); + if (keyboard_fd == -1) { printf("Failed to open keyboard event source.\n"); } - sched_setscheduler(0, SCHED_FIFO, &priority); - mlockall(MCL_CURRENT); // lock in memory to keep us from paging out + if (cfg->mouse_autoconnect) + mouse_hook_enabled = 1; + + if (cfg->keyboard_autoconnect) + kb_hook_enabled = 1; InitGayle(); 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"); - - *(gpclk + (CLK_GP0_CTL / 4)) = CLK_PASSWD | (1 << 5); - usleep(10); - while ((*(gpclk + (CLK_GP0_CTL / 4))) & (1 << 7)) - ; - usleep(100); - *(gpclk + (CLK_GP0_DIV / 4)) = - CLK_PASSWD | (6 << 12); // divider , 6=200MHz on pi3 - usleep(10); - *(gpclk + (CLK_GP0_CTL / 4)) = - CLK_PASSWD | 5 | (1 << 4); // pll? 6=plld, 5=pllc - usleep(10); - while (((*(gpclk + (CLK_GP0_CTL / 4))) & (1 << 7)) == 0) - ; - usleep(100); - - SET_GPIO_ALT(4, 0); // gpclk0 - - // set SA to output - INP_GPIO(2); - OUT_GPIO(2); - INP_GPIO(3); - OUT_GPIO(3); - INP_GPIO(5); - OUT_GPIO(5); - - // set gpio0 (aux0) and gpio1 (aux1) to input - INP_GPIO(0); - INP_GPIO(1); - - // Set GPIO pins 6,7 and 8-23 to output - for (g = 6; g <= 23; g++) { - INP_GPIO(g); - OUT_GPIO(g); - } - printf("Precalculate GPIO8-23 as Output\n"); - gpfsel0_o = *(gpio); // store gpio ddr - printf("gpfsel0: %#x\n", gpfsel0_o); - gpfsel1_o = *(gpio + 1); // store gpio ddr - printf("gpfsel1: %#x\n", gpfsel1_o); - gpfsel2_o = *(gpio + 2); // store gpio ddr - printf("gpfsel2: %#x\n", gpfsel2_o); - - // Set GPIO pins 8-23 to input - for (g = 8; g <= 23; g++) { - INP_GPIO(g); - } - printf("Precalculate GPIO8-23 as Input\n"); - gpfsel0 = *(gpio); // store gpio ddr - printf("gpfsel0: %#x\n", gpfsel0); - gpfsel1 = *(gpio + 1); // store gpio ddr - printf("gpfsel1: %#x\n", gpfsel1); - gpfsel2 = *(gpio + 2); // store gpio ddr - printf("gpfsel2: %#x\n", gpfsel2); - - GPIO_CLR = 1 << 2; - GPIO_CLR = 1 << 3; - GPIO_SET = 1 << 5; - - GPIO_SET = 1 << 6; - GPIO_SET = 1 << 7; - - // reset cpld statemachine first - - write_reg(0x01); - usleep(100); - usleep(1500); - write_reg(0x00); - usleep(100); - - // reset amiga and statemachine - skip_everything:; - cpu_pulse_reset(); - ovl = 1; - m68k_write_memory_8(0xbfe201, 0x0001); // AMIGA OVL - m68k_write_memory_8(0xbfe001, 0x0001); // AMIGA OVL high (ROM@0x0) + ps_reset_state_machine(); + ps_pulse_reset(); usleep(1500); m68k_init(); printf("Setting CPU type to %d.\n", cpu_type); - m68k_set_cpu_type(cpu_type); - m68k_pulse_reset(); - - if (maprom == 1) { - m68k_set_reg(M68K_REG_PC, 0xF80002); - } else { - m68k_set_reg(M68K_REG_PC, 0x0); - } - -/* - pthread_t id; - int err; - err = pthread_create(&id, NULL, &iplThread, NULL); - if (err != 0) - printf("\ncan't create IPL thread :[%s]", strerror(err)); - else - printf("\n IPL Thread created successfully\n"); -*/ - char c = 0; - - 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_set_cpu_type(&m68ki_cpu, cpu_type); + cpu_pulse_reset(); + + pthread_t ipl_tid = 0, cpu_tid, kbd_tid; + int err; + if (ipl_tid == 0) { + err = pthread_create(&ipl_tid, NULL, &ipl_task, NULL); + if (err != 0) + printf("[ERROR] Cannot create IPL thread: [%s]", strerror(err)); + else { + pthread_setname_np(ipl_tid, "pistorm: ipl"); + printf("IPL thread created successfully\n"); } + } - if (cpu_emulation_running) - m68k_execute(loop_cycles); - - // FIXME: Rework this to use keyboard events instead. - /*while (get_key_char(&c)) { - 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 (!kb_hook_enabled) { - 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(); - m68k_set_irq((srdata >> 13) & 0xff); - } else { - m68k_set_irq(0); - }; - usleep(1); -*/ + // create keyboard task + err = pthread_create(&kbd_tid, NULL, &keyboard_task, NULL); + if (err != 0) + printf("[ERROR] Cannot create keyboard thread: [%s]", strerror(err)); + else { + pthread_setname_np(kbd_tid, "pistorm: kbd"); + printf("[MAIN] Keyboard thread created successfully\n"); + } + // create cpu task + err = pthread_create(&cpu_tid, NULL, &cpu_task, NULL); + if (err != 0) + printf("[ERROR] Cannot create CPU thread: [%s]", strerror(err)); + else { + pthread_setname_np(cpu_tid, "pistorm: cpu"); + printf("[MAIN] CPU thread created successfully\n"); + } - if (GET_GPIO(1) == 0) { - srdata = read_reg(); - m68k_set_irq((srdata >> 13) & 0xff); - } else { - if (CheckIrq() == 1) { - write16(0xdff09c, 0x8008); - m68k_set_irq(2); - } - else - m68k_set_irq(0); - }; + // wait for cpu task to end before closing up and finishing + pthread_join(cpu_tid, NULL); + while (!emulator_exiting) { + emulator_exiting = 1; + usleep(0); } - stop_cpu_emulation:; + if (load_new_config == 0) + printf("[MAIN] All threads appear to have concluded; ending process\n"); if (mouse_fd != -1) close(mouse_fd); if (mem_fd) close(mem_fd); + if (load_new_config != 0) + goto switch_config; + + if (cfg->platform->shutdown) { + cfg->platform->shutdown(cfg); + } + return 0; } void cpu_pulse_reset(void) { - write_reg(0x00); - // printf("Status Reg%x\n",read_reg()); - usleep(100000); - write_reg(0x02); - // printf("Status Reg%x\n",read_reg()); + m68ki_cpu_core *state = &m68ki_cpu; + ps_pulse_reset(); + + ovl = 1; + if (cfg->platform->handle_reset) + cfg->platform->handle_reset(cfg); + + m68k_pulse_reset(state); } int cpu_irq_ack(int level) { @@ -462,372 +671,450 @@ int cpu_irq_ack(int level) { } static unsigned int target = 0; +static uint8_t send_keypress = 0; +static uint32_t platform_res, rres; + +uint8_t cdtv_dmac_reg_idx_read(); +void cdtv_dmac_reg_idx_write(uint8_t value); +uint32_t cdtv_dmac_read(uint32_t address, uint8_t type); +void cdtv_dmac_write(uint32_t address, uint32_t value, uint8_t type); + +unsigned int garbage = 0; + +static inline void inline_write_16(unsigned int address, unsigned int data) { + *(gpio + 0) = GPFSEL0_OUTPUT; + *(gpio + 1) = GPFSEL1_OUTPUT; + *(gpio + 2) = GPFSEL2_OUTPUT; + + *(gpio + 7) = ((data & 0xffff) << 8) | (REG_DATA << PIN_A0); + *(gpio + 7) = 1 << PIN_WR; + *(gpio + 10) = 1 << PIN_WR; + *(gpio + 10) = 0xffffec; + + *(gpio + 7) = ((address & 0xffff) << 8) | (REG_ADDR_LO << PIN_A0); + *(gpio + 7) = 1 << PIN_WR; + *(gpio + 10) = 1 << PIN_WR; + *(gpio + 10) = 0xffffec; + + *(gpio + 7) = ((0x0000 | (address >> 16)) << 8) | (REG_ADDR_HI << PIN_A0); + *(gpio + 7) = 1 << PIN_WR; + *(gpio + 10) = 1 << PIN_WR; + *(gpio + 10) = 0xffffec; + + *(gpio + 0) = GPFSEL0_INPUT; + *(gpio + 1) = GPFSEL1_INPUT; + *(gpio + 2) = GPFSEL2_INPUT; + + while (*(gpio + 13) & (1 << PIN_TXN_IN_PROGRESS)) {} + NOP NOP NOP NOP NOP NOP NOP NOP NOP NOP NOP NOP +} -#define PLATFORM_CHECK_READ(a) \ - if (address >= cfg->custom_low && address < cfg->custom_high) { \ - unsigned int target = 0; \ - switch(cfg->platform->id) { \ - case PLATFORM_AMIGA: { \ - if (custom_read_amiga(cfg, address, &target, a) != -1) { \ - return target; \ - } \ - break; \ - } \ - default: \ - break; \ - } \ - } \ - if (ovl || (address >= cfg->mapped_low && address < cfg->mapped_high)) { \ - if (handle_mapped_read(cfg, address, &target, a) != -1) \ - return target; \ - } +static inline void inline_write_8(unsigned int address, unsigned int data) { + if ((address & 1) == 0) + data = data + (data << 8); // EVEN, A0=0,UDS + else + data = data & 0xff; // ODD , A0=1,LDS -unsigned int m68k_read_memory_8(unsigned int address) { - PLATFORM_CHECK_READ(OP_TYPE_BYTE); + *(gpio + 0) = GPFSEL0_OUTPUT; + *(gpio + 1) = GPFSEL1_OUTPUT; + *(gpio + 2) = GPFSEL2_OUTPUT; + + *(gpio + 7) = ((data & 0xffff) << 8) | (REG_DATA << PIN_A0); + *(gpio + 7) = 1 << PIN_WR; + *(gpio + 10) = 1 << PIN_WR; + *(gpio + 10) = 0xffffec; + + *(gpio + 7) = ((address & 0xffff) << 8) | (REG_ADDR_LO << PIN_A0); + *(gpio + 7) = 1 << PIN_WR; + *(gpio + 10) = 1 << PIN_WR; + *(gpio + 10) = 0xffffec; + + *(gpio + 7) = ((0x0100 | (address >> 16)) << 8) | (REG_ADDR_HI << PIN_A0); + *(gpio + 7) = 1 << PIN_WR; + *(gpio + 10) = 1 << PIN_WR; + *(gpio + 10) = 0xffffec; - address &=0xFFFFFF; -// if (address < 0xffffff) { - return read8((uint32_t)address); -// } + *(gpio + 0) = GPFSEL0_INPUT; + *(gpio + 1) = GPFSEL1_INPUT; + *(gpio + 2) = GPFSEL2_INPUT; -// return 1; + while (*(gpio + 13) & (1 << PIN_TXN_IN_PROGRESS)) {} + NOP NOP NOP NOP NOP NOP NOP NOP NOP NOP NOP NOP } -unsigned int m68k_read_memory_16(unsigned int address) { - PLATFORM_CHECK_READ(OP_TYPE_WORD); +static inline void inline_write_32(unsigned int address, unsigned int value) { + inline_write_16(address, value >> 16); + inline_write_16(address + 2, value); +} - 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 (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; - } - } +static inline unsigned int inline_read_16(unsigned int address) { + *(gpio + 0) = GPFSEL0_OUTPUT; + *(gpio + 1) = GPFSEL1_OUTPUT; + *(gpio + 2) = GPFSEL2_OUTPUT; + + *(gpio + 7) = ((address & 0xffff) << 8) | (REG_ADDR_LO << PIN_A0); + *(gpio + 7) = 1 << PIN_WR; + *(gpio + 10) = 1 << PIN_WR; + *(gpio + 10) = 0xffffec; + + *(gpio + 7) = ((0x0200 | (address >> 16)) << 8) | (REG_ADDR_HI << PIN_A0); + *(gpio + 7) = 1 << PIN_WR; + *(gpio + 10) = 1 << PIN_WR; + *(gpio + 10) = 0xffffec; -// if (address < 0xffffff) { - address &=0xFFFFFF; - return (unsigned int)read16((uint32_t)address); -// } + *(gpio + 0) = GPFSEL0_INPUT; + *(gpio + 1) = GPFSEL1_INPUT; + *(gpio + 2) = GPFSEL2_INPUT; -// return 1; + *(gpio + 7) = (REG_DATA << PIN_A0); + *(gpio + 7) = 1 << PIN_RD; + + while (*(gpio + 13) & (1 << PIN_TXN_IN_PROGRESS)) {} + unsigned int value = *(gpio + 13); + + *(gpio + 10) = 0xffffec; + + return (value >> 8) & 0xffff; } -unsigned int m68k_read_memory_32(unsigned int address) { - PLATFORM_CHECK_READ(OP_TYPE_LONGWORD); +static inline unsigned int inline_read_8(unsigned int address) { + *(gpio + 0) = GPFSEL0_OUTPUT; + *(gpio + 1) = GPFSEL1_OUTPUT; + *(gpio + 2) = GPFSEL2_OUTPUT; -// if (address < 0xffffff) { - address &=0xFFFFFF; - uint16_t a = read16(address); - uint16_t b = read16(address + 2); - return (a << 16) | b; -// } + *(gpio + 7) = ((address & 0xffff) << 8) | (REG_ADDR_LO << PIN_A0); + *(gpio + 7) = 1 << PIN_WR; + *(gpio + 10) = 1 << PIN_WR; + *(gpio + 10) = 0xffffec; -// return 1; + *(gpio + 7) = ((0x0300 | (address >> 16)) << 8) | (REG_ADDR_HI << PIN_A0); + *(gpio + 7) = 1 << PIN_WR; + *(gpio + 10) = 1 << PIN_WR; + *(gpio + 10) = 0xffffec; + + *(gpio + 0) = GPFSEL0_INPUT; + *(gpio + 1) = GPFSEL1_INPUT; + *(gpio + 2) = GPFSEL2_INPUT; + + *(gpio + 7) = (REG_DATA << PIN_A0); + *(gpio + 7) = 1 << PIN_RD; + + while (*(gpio + 13) & (1 << PIN_TXN_IN_PROGRESS)) {} + unsigned int value = *(gpio + 13); + + *(gpio + 10) = 0xffffec; + + value = (value >> 8) & 0xffff; + + if ((address & 1) == 0) + return (value >> 8) & 0xff; // EVEN, A0=0,UDS + else + return value & 0xff; // ODD , A0=1,LDS } -#define PLATFORM_CHECK_WRITE(a) \ - if (address >= cfg->custom_low && address < cfg->custom_high) { \ - switch(cfg->platform->id) { \ - case PLATFORM_AMIGA: { \ - if (custom_write_amiga(cfg, address, value, a) != -1) { \ - return; \ - } \ - break; \ - } \ - default: \ - break; \ - } \ - } \ - if (address >= cfg->mapped_low && address < cfg->mapped_high) { \ - if (handle_mapped_write(cfg, address, value, a) != -1) \ - return; \ +static inline unsigned int inline_read_32(unsigned int address) { + unsigned int a = inline_read_16(address); + unsigned int b = inline_read_16(address + 2); + return (a << 16) | b; +} + +static inline uint32_t ps_read(uint8_t type, uint32_t addr) { + switch (type) { + case OP_TYPE_BYTE: + return inline_read_8(addr); + case OP_TYPE_WORD: + return inline_read_16(addr); + case OP_TYPE_LONGWORD: + return inline_read_32(addr); } + // This shouldn't actually happen. + return 0; +} -void m68k_write_memory_8(unsigned int address, unsigned int value) { - PLATFORM_CHECK_WRITE(OP_TYPE_BYTE); +static inline void ps_write(uint8_t type, uint32_t addr, uint32_t val) { + switch (type) { + case OP_TYPE_BYTE: + inline_write_8(addr, val); + return; + case OP_TYPE_WORD: + inline_write_16(addr, val); + return; + case OP_TYPE_LONGWORD: + inline_write_32(addr, val); + return; + } + // This shouldn't actually happen. + return; +} - if (address == 0xbfe001) { - if (ovl != (value & (1 << 0))) { - ovl = (value & (1 << 0)); - printf("OVL:%x\n", ovl); - } +static inline int32_t platform_read_check(uint8_t type, uint32_t addr, uint32_t *res) { + switch (cfg->platform->id) { + case PLATFORM_AMIGA: + switch (addr) { + case CIAAPRA: + if (mouse_hook_enabled && (mouse_buttons & 0x01)) { + rres = (uint32_t)ps_read(type, addr); + *res = (rres ^ 0x40); + return 1; + } + return 0; + break; + case CIAAICR: + if (kb_hook_enabled) { + rres = (uint32_t)ps_read(type, addr); + if (get_num_kb_queued() && (!send_keypress || send_keypress == 1)) { + rres |= 0x08; + if (!send_keypress) + send_keypress = 1; + } + if (send_keypress == 2) { + send_keypress = 0; + } + *res = rres; + return 1; + } + return 0; + break; + case CIAADAT: + if (kb_hook_enabled) { + rres = (uint32_t)ps_read(type, addr); + uint8_t c = 0, t = 0; + pop_queued_key(&c, &t); + t ^= 0x01; + rres = ((c << 1) | t) ^ 0xFF; + send_keypress = 2; + *res = rres; + return 1; + } + return 0; + break; + case JOY0DAT: + if (mouse_hook_enabled) { + unsigned short result = (mouse_dy << 8) | (mouse_dx); + *res = (unsigned int)result; + return 1; + } + return 0; + break; + case POTGOR: + if (mouse_hook_enabled) { + unsigned short result = (unsigned short)ps_read(type, addr); + // bit 1 rmb, bit 2 mmb + if (mouse_buttons & 0x06) { + *res = (unsigned int)((result ^ ((mouse_buttons & 0x02) << 9)) // move rmb to bit 10 + & (result ^ ((mouse_buttons & 0x04) << 6))); // move mmb to bit 8 + return 1; + } + *res = (unsigned int)(result & 0xfffd); + return 1; + } + return 0; + break; + default: + break; + } + + if (addr >= cfg->custom_low && addr < cfg->custom_high) { + if (addr >= PISCSI_OFFSET && addr < PISCSI_UPPER) { + *res = handle_piscsi_read(addr, type); + return 1; + } + if (addr >= PINET_OFFSET && addr < PINET_UPPER) { + *res = handle_pinet_read(addr, type); + return 1; + } + if (addr >= PIGFX_RTG_BASE && addr < PIGFX_UPPER) { + *res = rtg_read((addr & 0x0FFFFFFF), type); + return 1; + } + if (custom_read_amiga(cfg, addr, &target, type) != -1) { + *res = target; + return 1; + } + } + break; + default: + break; } -// if (address < 0xffffff) { - address &=0xFFFFFF; - write8((uint32_t)address, value); - return; -// } + if (ovl || (addr >= cfg->mapped_low && addr < cfg->mapped_high)) { + if (handle_mapped_read(cfg, addr, &target, type) != -1) { + *res = target; + return 1; + } + } -// return; + return 0; } -void m68k_write_memory_16(unsigned int address, unsigned int value) { - PLATFORM_CHECK_WRITE(OP_TYPE_WORD); +unsigned int m68k_read_memory_8(unsigned int address) { + if (platform_read_check(OP_TYPE_BYTE, address, &platform_res)) { + return platform_res; + } -// if (address < 0xffffff) { - address &=0xFFFFFF; - write16((uint32_t)address, value); - return; -// } -// return; + if (address & 0xFF000000) + return 0; + + return (unsigned int)inline_read_8((uint32_t)address); } -void m68k_write_memory_32(unsigned int address, unsigned int value) { - PLATFORM_CHECK_WRITE(OP_TYPE_LONGWORD); +unsigned int m68k_read_memory_16(unsigned int address) { + if (platform_read_check(OP_TYPE_WORD, address, &platform_res)) { + return platform_res; + } -// if (address < 0xffffff) { - address &=0xFFFFFF; - write16(address, value >> 16); - write16(address + 2, value); - return; -// } + if (address & 0xFF000000) + return 0; -// return; + if (address & 0x01) { + return ((inline_read_8(address) << 8) | inline_read_8(address + 1)); + } + return (unsigned int)inline_read_16((uint32_t)address); } -inline void write16(uint32_t address, uint32_t data) { - uint32_t addr_h_s = (address & 0x0000ffff) << 8; - uint32_t addr_h_r = (~address & 0x0000ffff) << 8; - uint32_t addr_l_s = (address >> 16) << 8; - uint32_t addr_l_r = (~address >> 16) << 8; - uint32_t data_s = (data & 0x0000ffff) << 8; - uint32_t data_r = (~data & 0x0000ffff) << 8; - - // asm volatile ("dmb" ::: "memory"); - W16 - *(gpio) = gpfsel0_o; - *(gpio + 1) = gpfsel1_o; - *(gpio + 2) = gpfsel2_o; - - *(gpio + 7) = addr_h_s; - *(gpio + 10) = addr_h_r; - GPIO_CLR = 1 << 7; - GPIO_SET = 1 << 7; - - *(gpio + 7) = addr_l_s; - *(gpio + 10) = addr_l_r; - GPIO_CLR = 1 << 7; - GPIO_SET = 1 << 7; - - // write phase - *(gpio + 7) = data_s; - *(gpio + 10) = data_r; - GPIO_CLR = 1 << 7; - GPIO_SET = 1 << 7; - - *(gpio) = gpfsel0; - *(gpio + 1) = gpfsel1; - *(gpio + 2) = gpfsel2; - while ((GET_GPIO(0))) - ; - // asm volatile ("dmb" ::: "memory"); -} +unsigned int m68k_read_memory_32(unsigned int address) { + if (platform_read_check(OP_TYPE_LONGWORD, address, &platform_res)) { + return platform_res; + } -inline void write8(uint32_t address, uint32_t data) { - if ((address & 1) == 0) - data = data + (data << 8); // EVEN, A0=0,UDS - else - data = data & 0xff; // ODD , A0=1,LDS - uint32_t addr_h_s = (address & 0x0000ffff) << 8; - uint32_t addr_h_r = (~address & 0x0000ffff) << 8; - uint32_t addr_l_s = (address >> 16) << 8; - uint32_t addr_l_r = (~address >> 16) << 8; - uint32_t data_s = (data & 0x0000ffff) << 8; - uint32_t data_r = (~data & 0x0000ffff) << 8; - - // asm volatile ("dmb" ::: "memory"); - W8 - *(gpio) = gpfsel0_o; - *(gpio + 1) = gpfsel1_o; - *(gpio + 2) = gpfsel2_o; - - *(gpio + 7) = addr_h_s; - *(gpio + 10) = addr_h_r; - GPIO_CLR = 1 << 7; - GPIO_SET = 1 << 7; - - *(gpio + 7) = addr_l_s; - *(gpio + 10) = addr_l_r; - GPIO_CLR = 1 << 7; - GPIO_SET = 1 << 7; - - // write phase - *(gpio + 7) = data_s; - *(gpio + 10) = data_r; - GPIO_CLR = 1 << 7; - GPIO_SET = 1 << 7; - - *(gpio) = gpfsel0; - *(gpio + 1) = gpfsel1; - *(gpio + 2) = gpfsel2; - while ((GET_GPIO(0))) - ; - // asm volatile ("dmb" ::: "memory"); -} + if (address & 0xFF000000) + return 0; -inline uint32_t read16(uint32_t address) { - volatile int val; - uint32_t addr_h_s = (address & 0x0000ffff) << 8; - uint32_t addr_h_r = (~address & 0x0000ffff) << 8; - uint32_t addr_l_s = (address >> 16) << 8; - uint32_t addr_l_r = (~address >> 16) << 8; - - // asm volatile ("dmb" ::: "memory"); - R16 - *(gpio) = gpfsel0_o; - *(gpio + 1) = gpfsel1_o; - *(gpio + 2) = gpfsel2_o; - - *(gpio + 7) = addr_h_s; - *(gpio + 10) = addr_h_r; - GPIO_CLR = 1 << 7; - GPIO_SET = 1 << 7; - - *(gpio + 7) = addr_l_s; - *(gpio + 10) = addr_l_r; - GPIO_CLR = 1 << 7; - GPIO_SET = 1 << 7; - - // read phase - *(gpio) = gpfsel0; - *(gpio + 1) = gpfsel1; - *(gpio + 2) = gpfsel2; - GPIO_CLR = 1 << 6; - while (!(GET_GPIO(0))) - ; - GPIO_CLR = 1 << 6; - val = *(gpio + 13); - GPIO_SET = 1 << 6; - // asm volatile ("dmb" ::: "memory"); - return (val >> 8) & 0xffff; + if (address & 0x01) { + uint32_t c = inline_read_8(address); + c |= (be16toh(inline_read_16(address+1)) << 8); + c |= (inline_read_8(address + 3) << 24); + return htobe32(c); + } + uint16_t a = inline_read_16(address); + uint16_t b = inline_read_16(address + 2); + return (a << 16) | b; } -inline uint32_t read8(uint32_t address) { - int val; - uint32_t addr_h_s = (address & 0x0000ffff) << 8; - uint32_t addr_h_r = (~address & 0x0000ffff) << 8; - uint32_t addr_l_s = (address >> 16) << 8; - uint32_t addr_l_r = (~address >> 16) << 8; - - // asm volatile ("dmb" ::: "memory"); - R8 - *(gpio) = gpfsel0_o; - *(gpio + 1) = gpfsel1_o; - *(gpio + 2) = gpfsel2_o; - - *(gpio + 7) = addr_h_s; - *(gpio + 10) = addr_h_r; - GPIO_CLR = 1 << 7; - GPIO_SET = 1 << 7; - - *(gpio + 7) = addr_l_s; - *(gpio + 10) = addr_l_r; - GPIO_CLR = 1 << 7; - GPIO_SET = 1 << 7; - - // read phase - *(gpio) = gpfsel0; - *(gpio + 1) = gpfsel1; - *(gpio + 2) = gpfsel2; - - GPIO_CLR = 1 << 6; - while (!(GET_GPIO(0))) - ; - GPIO_CLR = 1 << 6; - val = *(gpio + 13); - GPIO_SET = 1 << 6; - // asm volatile ("dmb" ::: "memory"); - - val = (val >> 8) & 0xffff; - if ((address & 1) == 0) - return (val >> 8) & 0xff; // EVEN, A0=0,UDS - else - return val & 0xff; // ODD , A0=1,LDS -} +static inline int32_t platform_write_check(uint8_t type, uint32_t addr, uint32_t val) { + switch (cfg->platform->id) { + case PLATFORM_MAC: + switch (addr) { + case 0xEFFFFE: // VIA1? + if (val & 0x10 && !ovl) { + ovl = 1; + printf("[MAC] OVL on.\n"); + handle_ovl_mappings_mac68k(cfg); + } else if (ovl) { + ovl = 0; + printf("[MAC] OVL off.\n"); + handle_ovl_mappings_mac68k(cfg); + } + break; + } + break; + case PLATFORM_AMIGA: + switch (addr) { + case CIAAPRA: + if (ovl != (val & (1 << 0))) { + ovl = (val & (1 << 0)); + printf("OVL:%x\n", ovl); + } + return 0; + break; + case SERDAT: { + char *serdat = (char *)&val; + // SERDAT word. see amiga dev docs appendix a; upper byte is control codes, and bit 0 is always 1. + // ignore this upper byte as it's not viewable data, only display lower byte. + printf("%c", serdat[0]); + return 0; + break; + } + case INTENA: + // This code is kind of strange and should probably be reworked/revoked. + if (!(val & 0x8000)) { + if (val & 0x04) { + int2_enabled = 0; + } + } + else if (val & 0x04) { + int2_enabled = 1; + } + return 0; + break; + default: + break; + } -/******************************************************/ - -void write_reg(unsigned int value) { - STATUSREGADDR - *(gpio) = gpfsel0_o; - *(gpio + 1) = gpfsel1_o; - *(gpio + 2) = gpfsel2_o; - *(gpio + 7) = (value & 0xffff) << 8; - *(gpio + 10) = (~value & 0xffff) << 8; - GPIO_CLR = 1 << 7; - GPIO_CLR = 1 << 7; // delay - GPIO_SET = 1 << 7; - GPIO_SET = 1 << 7; - // Bus HIGH-Z - *(gpio) = gpfsel0; - *(gpio + 1) = gpfsel1; - *(gpio + 2) = gpfsel2; + if (addr >= cfg->custom_low && addr < cfg->custom_high) { + if (addr >= PISCSI_OFFSET && addr < PISCSI_UPPER) { + handle_piscsi_write(addr, val, type); + return 1; + } + if (addr >= PINET_OFFSET && addr < PINET_UPPER) { + handle_pinet_write(addr, val, type); + return 1; + } + if (addr >= PIGFX_RTG_BASE && addr < PIGFX_UPPER) { + rtg_write((addr & 0x0FFFFFFF), val, type); + return 1; + } + if (custom_write_amiga(cfg, addr, val, type) != -1) { + return 1; + } + } + break; + default: + break; + } + + if (ovl || (addr >= cfg->mapped_low && addr < cfg->mapped_high)) { + if (handle_mapped_write(cfg, addr, val, type) != -1) { + return 1; + } + } + + return 0; } -uint16_t read_reg(void) { - uint32_t val; - STATUSREGADDR - // Bus HIGH-Z - *(gpio) = gpfsel0; - *(gpio + 1) = gpfsel1; - *(gpio + 2) = gpfsel2; - GPIO_CLR = 1 << 6; - GPIO_CLR = 1 << 6; // delay - GPIO_CLR = 1 << 6; - GPIO_CLR = 1 << 6; - val = *(gpio + 13); - GPIO_SET = 1 << 6; - return (uint16_t)(val >> 8); +void m68k_write_memory_8(unsigned int address, unsigned int value) { + if (platform_write_check(OP_TYPE_BYTE, address, value)) + return; + + if (address & 0xFF000000) + return; + + inline_write_8((uint32_t)address, value); + return; } -// -// Set up a memory regions to access GPIO -// -void setup_io() { - /* open /dev/mem */ - if ((mem_fd = open("/dev/mem", O_RDWR | O_SYNC)) < 0) { - printf("can't open /dev/mem \n"); - exit(-1); +void m68k_write_memory_16(unsigned int address, unsigned int value) { + if (platform_write_check(OP_TYPE_WORD, address, value)) + return; + + if (address & 0xFF000000) + return; + + if (address & 0x01) { + inline_write_8(value & 0xFF, address); + inline_write_8((value >> 8) & 0xFF, address + 1); + return; } - /* mmap GPIO */ - gpio_map = mmap( - NULL, // Any adddress in our space will do - BCM2708_PERI_SIZE, // Map length - PROT_READ | PROT_WRITE, // Enable reading & writting to mapped memory - MAP_SHARED, // Shared with other processes - mem_fd, // File to map - BCM2708_PERI_BASE // Offset to GPIO peripheral - ); + inline_write_16((uint32_t)address, value); + return; +} - close(mem_fd); // No need to keep mem_fd open after mmap +void m68k_write_memory_32(unsigned int address, unsigned int value) { + if (platform_write_check(OP_TYPE_LONGWORD, address, value)) + return; - if (gpio_map == MAP_FAILED) { - printf("gpio mmap error %d\n", (int)gpio_map); // errno also set! - exit(-1); - } + if (address & 0xFF000000) + return; - gpio = ((volatile unsigned *)gpio_map) + GPIO_ADDR / 4; - gpclk = ((volatile unsigned *)gpio_map) + GPCLK_ADDR / 4; + if (address & 0x01) { + inline_write_8(value & 0xFF, address); + inline_write_16(htobe16(((value >> 8) & 0xFFFF)), address + 1); + inline_write_8((value >> 24), address + 3); + return; + } -} // setup_io + inline_write_16(address, value >> 16); + inline_write_16(address + 2, value); + return; +}