forked from M-Labs/artiq
98 lines
1.5 KiB
C
98 lines
1.5 KiB
C
#include <stdio.h>
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#include <stdlib.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 <console.h>
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#include <system.h>
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#include <generated/csr.h>
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#include "elf_loader.h"
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static void receive_sync(void)
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{
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char c;
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int recognized;
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recognized = 0;
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while(1) {
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c = readchar();
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if(c == 0x5a) {
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recognized++;
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if(recognized == 4)
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return;
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} else
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recognized = 0;
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}
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}
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static int receive_length(void)
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{
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unsigned int r;
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int i;
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r = 0;
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for(i=0;i<4;i++) {
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r <<= 8;
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r |= (unsigned char)readchar();
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}
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return r;
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}
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static int download_kernel(void *buffer, int maxlength)
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{
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int length;
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int i;
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unsigned char *_buffer = buffer;
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receive_sync();
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length = receive_length();
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if(length > maxlength)
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return -1;
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for(i=0;i<length;i++)
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_buffer[i] = readchar();
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return length;
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}
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static void printint(int x)
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{
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printf("%d\n", x);
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}
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static const struct symbol syscalls[] = {
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{"__syscall_printint", printint},
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{NULL, NULL}
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};
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typedef void (*kernel_function)(int);
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int main(void)
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{
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unsigned char kbuf[256*1024];
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unsigned char kcode[256*1024];
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kernel_function k = (kernel_function)kcode;
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int i;
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int length;
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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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while(1) {
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length = download_kernel(kbuf, sizeof(kbuf));
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if(length > 0) {
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load_elf(syscalls, kbuf, length, kcode, sizeof(kcode));
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flush_cpu_icache();
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for(i=0;i<40;i++) {
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printf("%2d: ", i);
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k(i);
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}
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}
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}
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return 0;
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}
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