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Mostly implement the pc98 scheme. The partition table has no LBA

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fields at all, so we're entirely dependent upon CHS addressing.
And CHS addressing is what needs more work.
This commit is contained in:
marcel 2014-03-25 00:29:56 +00:00
parent 1d6c278537
commit 71584f05df
1 changed files with 54 additions and 4 deletions
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58
pc98.c
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@ -29,13 +29,19 @@ __FBSDID("$FreeBSD$");
#include <sys/types.h> #include <sys/types.h>
#include <sys/diskpc98.h> #include <sys/diskpc98.h>
#include <sys/endian.h>
#include <sys/errno.h> #include <sys/errno.h>
#include <stdlib.h> #include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "mkimg.h" #include "mkimg.h"
#include "scheme.h" #include "scheme.h"
#define PC98_BOOTCODESZ 8192
static struct mkimg_alias pc98_aliases[] = { static struct mkimg_alias pc98_aliases[] = {
{ ALIAS_FREEBSD, ALIAS_INT2TYPE(PC98_PTYP_386BSD) },
{ ALIAS_NONE, 0 } { ALIAS_NONE, 0 }
}; };
@ -44,14 +50,56 @@ pc98_metadata(u_int where)
{ {
u_int secs; u_int secs;
secs = (where == SCHEME_META_IMG_START) ? 2 : 0; secs = PC98_BOOTCODESZ / secsz;
return (secs); return ((where == SCHEME_META_IMG_START) ? secs : 0);
}
static void
pc98_chs(u_short *cyl, u_char *hd, u_char *sec, uint32_t lba __unused)
{
*cyl = 0xffff; /* XXX */
*hd = 0xff; /* XXX */
*sec = 0xff; /* XXX */
} }
static int static int
pc98_write(int fd __unused, lba_t imgsz __unused, void *bootcode __unused) pc98_write(int fd, lba_t imgsz __unused, void *bootcode)
{ {
return (ENOSYS); struct part *part;
struct pc98_partition *dpbase, *dp;
u_char *buf;
int error, ptyp;
buf = malloc(PC98_BOOTCODESZ);
if (buf == NULL)
return (ENOMEM);
if (bootcode != NULL) {
memcpy(buf, bootcode, PC98_BOOTCODESZ);
memset(buf + secsz, 0, secsz);
} else
memset(buf, 0, PC98_BOOTCODESZ);
le16enc(buf + PC98_MAGICOFS, PC98_MAGIC);
dpbase = (void *)(buf + secsz);
STAILQ_FOREACH(part, &partlist, link) {
dp = dpbase + part->index;
ptyp = ALIAS_TYPE2INT(part->type);
dp->dp_mid = ptyp;
dp->dp_sid = ptyp >> 8;
pc98_chs(&dp->dp_scyl, &dp->dp_shd, &dp->dp_ssect,
part->block);
pc98_chs(&dp->dp_scyl, &dp->dp_shd, &dp->dp_ssect,
part->block + part->size - 1);
if (part->label != NULL)
memcpy(dp->dp_name, part->label, strlen(part->label));
}
error = mkimg_seek(fd, 0);
if (error == 0) {
if (write(fd, buf, PC98_BOOTCODESZ) != PC98_BOOTCODESZ)
error = errno;
}
free(buf);
return (error);
} }
static struct mkimg_scheme pc98_scheme = { static struct mkimg_scheme pc98_scheme = {
@ -60,6 +108,8 @@ static struct mkimg_scheme pc98_scheme = {
.aliases = pc98_aliases, .aliases = pc98_aliases,
.metadata = pc98_metadata, .metadata = pc98_metadata,
.write = pc98_write, .write = pc98_write,
.bootcode = PC98_BOOTCODESZ,
.labellen = 16,
.nparts = PC98_NPARTS .nparts = PC98_NPARTS
}; };