137 lines
2.5 KiB
C
137 lines
2.5 KiB
C
// The OS/K Team licenses this file to you under the MIT license.
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// See the LICENSE file in the project root for more information.
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#include <sys/time.h>
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#include <signal.h>
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#include <pc/device.h>
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#include <pc/console.h>
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#define FWPROGSIZE (1024 * 1024 * 1024)
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static ssize_t fwsize;
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static ushort *fwprog;
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ctx_t main_ctx;
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void sigcommon(void) { _except(E_BRK, "SIGNAL'ed"); }
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void sigint(int _) { sigcommon(); }
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void sigsegv(int _) { logerr("\nCaught: Segmentation fault\n\n"); dumpregs(); die(1); }
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jmp_buf exc_jmp_buf;
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//
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// Main loop
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//
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void main_loop(void)
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{
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setjmp(exc_jmp_buf);
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// Start decoding
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while (!dying) {
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// Execute one instruction
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decode();
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console_update();
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}
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die(0);
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}
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int main(int argc, char **argv)
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{
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FILE *fwfile;
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#if 0 && !defined(NDEBUG)
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main_ctx.dumpsw = 1;
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#endif
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main_ctx.r = arch_r;
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main_ctx.i = arch_i;
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//
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// srand
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//
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struct timeval time;
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gettimeofday(&time, NULL);
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srandom((time.tv_sec * 1000) + (time.tv_usec / 1000));
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//
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// Signal handling
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//
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signal(SIGINT, sigint);
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signal(SIGBUS, sigsegv);
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signal(SIGSEGV, sigsegv);
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//
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// Load program
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//
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if (argc < 3) {
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logerr("Not enough arguments\n");
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exit(-3);
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}
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create_symtab(argv[2]);
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fwfile = fopen(argv[1], "rb");
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if (!fwfile) {
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logerr("Couldn't open program file\n");
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exit(-2);
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}
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fwprog = malloc(FWPROGSIZE);
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if (!fwprog) {
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logerr("Couldn't allocate firmware buffer\n");
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exit(-1);
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}
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fwsize = fread(fwprog, 1, FWPROGSIZE, fwfile);
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if (fwsize < 2) {
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logerr("Program file too small or empty\n");
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free(fwprog);
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exit(-3);
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}
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fclose(fwfile);
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//
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// Register frame allocation
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//
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main_ctx.rf = calloc(NREGS, sizeof(ulong));
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//
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// Memory allocation
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//
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main_ctx.mp = malloc(MEMSIZE + 16);
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main_ctx.mz = MEMSIZE;
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main_ctx.rf[EIP] = MEMOFF;
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if (main_ctx.mp == 0) {
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logerr("Couldn't allocate RAM\n");
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free(main_ctx.rf);
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free(fwprog);
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exit(-1);
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}
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memcpy(&main_ctx.mp[addr2real(main_ctx.rf[EIP])], fwprog, fwsize);
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//
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// Devices initialization
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//
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main_ctx.dh = 0;
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if (devinitall() < 0) {
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logerr("Couldn't initialize devices\n");
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free(main_ctx.rf);
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free(fwprog);
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exit(-10);
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}
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// To be moved to some screen device
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console_init();
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main_loop();
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}
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