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filesystem support

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git-svn-id: svn://svn.coreboot.org/coreboot/trunk@1398 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
This commit is contained in:
Greg Watson 2004-03-13 03:09:57 +00:00
commit b9f5c112cc
8 changed files with 1774 additions and 26 deletions
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31
src/stream/ide_stream.c
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@ -4,10 +4,11 @@
#include <stream/read_bytes.h>
#include <delay.h>
#include <string.h>
#include <pc80/ide.h>
/* read a sector or a partial sector */
extern int ide_read(int drive, unsigned long block, void * buffer);
extern int ide_init(void);
#ifndef IDE_BOOT_DRIVE
#define IDE_BOOT_DRIVE 0
#endif
static unsigned long offset;
int stream_init(void)
@ -30,7 +31,7 @@ int stream_init(void)
#else
offset = 0x7e00;
#endif
res = ide_init();
res = ide_probe(IDE_BOOT_DRIVE);
delay(1);
return res;
}
@ -40,27 +41,9 @@ void stream_fini(void)
return;
}
#ifdef IDE_SWAB
/* from string/swab.c */
void
swab (const char *from, char *to, int n)
{
n &= ~1;
while (n > 1)
{
const char b0 = from[--n], b1 = from[--n];
to[n] = b0;
to[n + 1] = b1;
}
}
#endif
static unsigned char buffer[512];
static unsigned int block_num = 0;
static unsigned int first_fill = 1;
#ifndef IDE_BOOT_DRIVE
#define IDE_BOOT_DRIVE 0
#endif
static byte_offset_t stream_ide_read(void *vdest, byte_offset_t offset, byte_offset_t count)
{
byte_offset_t bytes = 0;
@ -84,11 +67,7 @@ static byte_offset_t stream_ide_read(void *vdest, byte_offset_t offset, byte_off
len = (count - bytes);
}
#ifdef IDE_SWAB
swab(buffer + byte_offset, dest, len);
#else
memcpy(dest, buffer + byte_offset, len);
#endif
offset += len;
bytes += len;