forked from M-Labs/artiq
118 lines
2.5 KiB
C
118 lines
2.5 KiB
C
#include <stdio.h>
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#include <string.h>
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#include <irq.h>
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#include <uart.h>
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#include <system.h>
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#include <time.h>
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#include <generated/csr.h>
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#include "corecom.h"
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#include "elf_loader.h"
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#include "exceptions.h"
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#include "services.h"
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#include "rtio.h"
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#include "dds.h"
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static unsigned char kcode[256*1024];
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static struct symbol symtab[128];
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static int _symtab_count;
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static char _symtab_strings[128*16];
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static char *_symtab_strptr;
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static void symtab_init(void)
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{
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memset(symtab, 0, sizeof(symtab));
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_symtab_count = 0;
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_symtab_strptr = _symtab_strings;
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}
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static int symtab_add(const char *name, void *target)
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{
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if(_symtab_count >= sizeof(symtab)/sizeof(symtab[0])) {
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corecom_log("Too many provided symbols in object");
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symtab_init();
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return 0;
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}
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symtab[_symtab_count].name = _symtab_strptr;
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symtab[_symtab_count].target = target;
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_symtab_count++;
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while(1) {
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if(_symtab_strptr >= &_symtab_strings[sizeof(_symtab_strings)]) {
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corecom_log("Provided symbol string table overflow");
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symtab_init();
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return 0;
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}
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*_symtab_strptr = *name;
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_symtab_strptr++;
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if(*name == 0)
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break;
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name++;
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}
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return 1;
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}
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static int load_object(void *buffer, int length)
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{
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symtab_init();
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return load_elf(
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resolve_service_symbol, symtab_add,
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buffer, length, kcode, sizeof(kcode));
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}
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typedef void (*kernel_function)(void);
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static int run_kernel(const char *kernel_name, int *eid)
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{
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kernel_function k;
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void *jb;
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k = find_symbol(symtab, kernel_name);
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if(k == NULL) {
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corecom_log("Failed to find kernel entry point '%s' in object", kernel_name);
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return KERNEL_RUN_STARTUP_FAILED;
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}
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jb = exception_push();
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if(__builtin_setjmp(jb)) {
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*eid = exception_getid();
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return KERNEL_RUN_EXCEPTION;
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} else {
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rtio_init();
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flush_cpu_icache();
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k();
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exception_pop(1);
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return KERNEL_RUN_FINISHED;
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}
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}
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static void blink_led(void)
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{
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int i, ev, p;
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p = identifier_frequency_read()/10;
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time_init();
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for(i=0;i<3;i++) {
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leds_out_write(1);
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while(!elapsed(&ev, p));
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leds_out_write(0);
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while(!elapsed(&ev, p));
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}
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}
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int main(void)
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{
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irq_setmask(0);
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irq_setie(1);
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uart_init();
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puts("ARTIQ runtime built "__DATE__" "__TIME__"\n");
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dds_init();
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blink_led();
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corecom_serve(load_object, run_kernel);
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return 0;
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}
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