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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "debug.h"
#include "panic.h"
#define BLOCK_SIZE 512
static FILE* file;
int ata_read_sectors(unsigned long start, int count, void* buf)
{
if ( count > 1 )
DEBUGF("[Reading %d blocks: 0x%lx to 0x%lx]\n",
count, start, start+count-1);
else
DEBUGF("[Reading block 0x%lx]\n", start);
if(fseek(file,start*BLOCK_SIZE,SEEK_SET)) {
perror("fseek");
return -1;
}
if(!fread(buf,BLOCK_SIZE,count,file)) {
DEBUGF("ata_write_sectors(0x%x, 0x%x, 0x%x)\n", start, count, buf );
perror("fread");
panicf("Disk error\n");
}
return 0;
}
int ata_write_sectors(unsigned long start, int count, void* buf)
{
if ( count > 1 )
DEBUGF("[Writing %d blocks: 0x%lx to 0x%lx]\n",
count, start, start+count-1);
else
DEBUGF("[Writing block 0x%lx]\n", start);
if (start == 0)
panicf("Writing on sector 0!\n");
if(fseek(file,start*BLOCK_SIZE,SEEK_SET)) {
perror("fseek");
return -1;
}
if(!fwrite(buf,BLOCK_SIZE,count,file)) {
DEBUGF("ata_write_sectors(0x%x, 0x%x, 0x%x)\n", start, count, buf );
perror("fwrite");
panicf("Disk error\n");
}
return 0;
}
int ata_init(char* filename)
{
if (!filename)
filename = "disk.img";
/* check disk size */
file=fopen(filename,"r+");
if(!file) {
fprintf(stderr, "read_disk() - Could not find \"%s\"\n",filename);
return -1;
}
return 0;
}
void ata_exit(void)
{
fclose(file);
}
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