mirror of https://github.com/hsoft/collapseos.git
136 lines
3.0 KiB
C
136 lines
3.0 KiB
C
#include <stdint.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <termios.h>
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#include "emul.h"
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#include "forth-bin.h"
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#include "blkfs-bin.h"
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// in sync with glue.asm
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#define RAMSTART 0x900
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#define STDIO_PORT 0x00
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// This binary is also used for automated tests and those tests, when
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// failing, send a non-zero value to RET_PORT to indicate failure
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#define RET_PORT 0x01
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// Port for block reads. Write 2 bytes, MSB first, on that port and then
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// read 1024 bytes from the DATA port.
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#define BLK_PORT 0x03
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#define BLKDATA_PORT 0x04
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static FILE *fp;
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static FILE *blkfp;
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static int retcode = 0;
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static uint16_t blkid = 0;
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static uint8_t iord_stdio()
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{
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int c = getc(fp);
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if (c == EOF) {
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c = 4; // ASCII EOT
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}
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return (uint8_t)c;
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}
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static void iowr_stdio(uint8_t val)
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{
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putchar(val);
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}
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static void iowr_ret(uint8_t val)
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{
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retcode = val;
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}
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static void iowr_blk(uint8_t val)
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{
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blkid <<= 8;
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blkid |= val;
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if (blkfp != NULL) {
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fseek(blkfp, blkid*1024, SEEK_SET);
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}
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}
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static uint8_t iord_blkdata()
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{
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uint8_t res = 0;
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if (blkfp != NULL) {
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int c = getc(blkfp);
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if (c != EOF) {
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res = c;
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}
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}
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return res;
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}
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static void iowr_blkdata(uint8_t val)
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{
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if (blkfp != NULL) {
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putc(val, blkfp);
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}
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}
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int main(int argc, char *argv[])
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{
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bool tty = false;
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struct termios termInfo;
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if (argc == 2) {
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fp = fopen(argv[1], "r");
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if (fp == NULL) {
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fprintf(stderr, "Can't open %s\n", argv[1]);
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return 1;
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}
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} else if (argc == 1) {
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fp = stdin;
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tty = isatty(fileno(stdin));
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if (tty) {
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// Turn echo off: the shell takes care of its own echoing.
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if (tcgetattr(0, &termInfo) == -1) {
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printf("Can't setup terminal.\n");
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return 1;
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}
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termInfo.c_lflag &= ~ECHO;
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termInfo.c_lflag &= ~ICANON;
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tcsetattr(0, TCSAFLUSH, &termInfo);
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}
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} else {
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fprintf(stderr, "Usage: ./forth [filename]\n");
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return 1;
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}
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blkfp = fopen("blkfs", "r+");
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if (blkfp) {
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fprintf(stderr, "Using blkfs file\n");
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} else {
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blkfp = fmemopen((char*)BLKFS, sizeof(BLKFS), "r");
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fprintf(stderr, "Using in-memory read-only blkfs\n");
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}
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Machine *m = emul_init();
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m->ramstart = RAMSTART;
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m->iord[STDIO_PORT] = iord_stdio;
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m->iowr[STDIO_PORT] = iowr_stdio;
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m->iowr[RET_PORT] = iowr_ret;
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m->iowr[BLK_PORT] = iowr_blk;
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m->iord[BLKDATA_PORT] = iord_blkdata;
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m->iowr[BLKDATA_PORT] = iowr_blkdata;
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// initialize memory
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for (int i=0; i<sizeof(KERNEL); i++) {
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m->mem[i] = KERNEL[i];
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}
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// Run!
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while (emul_step());
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if (tty) {
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printf("\nDone!\n");
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termInfo.c_lflag |= ECHO;
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termInfo.c_lflag |= ICANON;
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tcsetattr(0, TCSAFLUSH, &termInfo);
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emul_printdebug();
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}
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if (blkfp != NULL) {
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fclose(blkfp);
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}
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fclose(fp);
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return retcode;
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}
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