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freebsd-dev/lib/libdisk/write_disk.c
Robert Nordier f0da1b03a0 Do install-time configuration of the i386 boot0 boot manager. At 
present, this is limited to turning on the packet option if any of
disk slices begin above cylinder 1023.  The effect of this change
should therefore be to automatically enable LBA support, as needed,
when installing FreeBSD.

Something-of-the-kind-requested-by: peter
2000-12-12 17:25:06 +00:00

405 lines
8.8 KiB
C
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/*
* ----------------------------------------------------------------------------
* "THE BEER-WARE LICENSE" (Revision 42):
* <phk@login.dknet.dk> wrote this file. As long as you retain this notice you
* can do whatever you want with this stuff. If we meet some day, and you think
* this stuff is worth it, you can buy me a beer in return. Poul-Henning Kamp
* ----------------------------------------------------------------------------
*
* $FreeBSD$
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <string.h>
#include <err.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
#include <sys/disklabel.h>
#include <sys/diskslice.h>
#include <paths.h>
#include "libdisk.h"
#define DOSPTYP_EXTENDED 5
#define BBSIZE 8192
#define SBSIZE 8192
#define DEF_RPM 3600
#define DEF_INTERLEAVE 1
#ifdef PC98
#define WHERE(offset,disk) (offset)
#else
#define WHERE(offset,disk) (disk->flags & DISK_ON_TRACK ? offset + 63 : offset)
#endif
int
Write_FreeBSD(int fd, struct disk *new, struct disk *old, struct chunk *c1)
{
struct disklabel *dl;
struct chunk *c2;
int i,j;
void *p;
u_char buf[BBSIZE];
#ifdef __alpha__
u_long *lp, sum;
#endif
for(i=0;i<BBSIZE/512;i++) {
p = read_block(fd,WHERE(i + c1->offset,new));
memcpy(buf+512*i,p,512);
free(p);
}
#if defined(__i386__)
if(new->boot1)
memcpy(buf,new->boot1,512);
if(new->boot2)
memcpy(buf+512,new->boot2,BBSIZE-512);
#elif defined(__alpha__)
if(new->boot1)
memcpy(buf+512,new->boot1,BBSIZE-512);
#endif
dl = (struct disklabel *) (buf+512*LABELSECTOR+LABELOFFSET);
memset(dl,0,sizeof *dl);
for(c2=c1->part;c2;c2=c2->next) {
if (c2->type == unused) continue;
if (!strcmp(c2->name,"X")) continue;
#ifdef __alpha__
j = c2->name[strlen(c2->name) - 1] - 'a';
#else
j = c2->name[strlen(new->name) + 2] - 'a';
#endif
if (j < 0 || j >= MAXPARTITIONS || j == RAW_PART) {
#ifdef DEBUG
warn("weird partition letter %c",c2->name[strlen(new->name) + 2]);
#endif
continue;
}
dl->d_partitions[j].p_size = c2->size;
dl->d_partitions[j].p_offset = c2->offset;
dl->d_partitions[j].p_fstype = c2->subtype;
}
dl->d_bbsize = BBSIZE;
/*
* Add in defaults for superblock size, interleave, and rpms
*/
dl->d_sbsize = SBSIZE;
dl->d_interleave = DEF_INTERLEAVE;
dl->d_rpm = DEF_RPM;
strcpy(dl->d_typename,c1->name);
dl->d_secsize = 512;
dl->d_secperunit = new->chunks->size;
dl->d_ncylinders = new->bios_cyl;
dl->d_ntracks = new->bios_hd;
dl->d_nsectors = new->bios_sect;
dl->d_secpercyl = dl->d_ntracks * dl->d_nsectors;
dl->d_npartitions = MAXPARTITIONS;
dl->d_type = new->name[0] == 's' || new->name[0] == 'd' ||
new->name[0] == 'o' ? DTYPE_SCSI : DTYPE_ESDI;
dl->d_partitions[RAW_PART].p_size = c1->size;
dl->d_partitions[RAW_PART].p_offset = c1->offset;
#ifdef PC98
dl->d_rpm = 3600;
dl->d_interleave = 1;
#endif
#ifndef PC98
if(new->flags & DISK_ON_TRACK)
for(i=0;i<MAXPARTITIONS;i++)
if (dl->d_partitions[i].p_size)
dl->d_partitions[i].p_offset += 63;
#endif
dl->d_magic = DISKMAGIC;
dl->d_magic2 = DISKMAGIC;
dl->d_checksum = dkcksum(dl);
#ifdef __alpha__
/*
* Tell SRM where the bootstrap is.
*/
lp = (u_long *)buf;
lp[60] = 15;
lp[61] = 1;
lp[62] = 0;
/*
* Generate the bootblock checksum for the SRM console.
*/
for (lp = (u_long *)buf, i = 0, sum = 0; i < 63; i++)
sum += lp[i];
lp[63] = sum;
#endif
for(i=0;i<BBSIZE/512;i++) {
write_block(fd,WHERE(i + c1->offset,new),buf+512*i);
}
return 0;
}
int
Write_Extended(int fd, struct disk *new, struct disk *old, struct chunk *c1)
{
return 0;
}
#ifndef PC98
static void
Write_Int32(u_int32_t *p, u_int32_t v)
{
u_int8_t *bp = (u_int8_t *)p;
bp[0] = (v >> 0) & 0xff;
bp[1] = (v >> 8) & 0xff;
bp[2] = (v >> 16) & 0xff;
bp[3] = (v >> 24) & 0xff;
}
#ifndef __alpha__
/*
* Special install-time configuration for the i386 boot0 boot manager.
*/
static void
Cfg_Boot_Mgr(u_char *mbr, int edd)
{
if (mbr[0x1b0] == 0x66 && mbr[0x1b1] == 0xbb) {
if (edd)
mbr[0x1bb] |= 0x80; /* Packet mode on */
else
mbr[0x1bb] &= 0x7f; /* Packet mode off */
}
}
#endif
#endif
int
Write_Disk(struct disk *d1)
{
int fd,i,j;
struct disk *old = 0;
struct chunk *c1;
int ret = 0;
char device[64];
u_char *mbr;
struct dos_partition *dp,work[NDOSPART];
#ifdef PC98
int s[7];
int PC98_EntireDisk = 0;
#else
int s[4];
#ifndef __alpha__
int need_edd = 0; /* Need EDD (packet interface) */
#endif
#endif
int one = 1;
int zero = 0;
strcpy(device,_PATH_DEV);
strcat(device,d1->name);
#ifdef PC98
/* XXX - for entire FreeBSD(98) */
for (c1 = d1->chunks->part; c1; c1 = c1->next) {
if ((c1->type == freebsd) || (c1->offset == 0))
device[9] = 0;
}
#endif
fd = open(device,O_RDWR);
if (fd < 0) {
#ifdef DEBUG
warn("open(%s) failed",device);
#endif
return 1;
}
ioctl(fd, DIOCWLABEL, &one);
memset(s,0,sizeof s);
#ifdef PC98
mbr = read_block(fd,WHERE(1,d1));
#else
mbr = read_block(fd,WHERE(0,d1));
#endif
dp = (struct dos_partition*) (mbr + DOSPARTOFF);
memcpy(work,dp,sizeof work);
dp = work;
free(mbr);
for (c1=d1->chunks->part; c1 ; c1 = c1->next) {
if (c1->type == unused) continue;
if (!strcmp(c1->name,"X")) continue;
#ifndef __alpha__
j = c1->name[4] - '1';
j = c1->name[strlen(d1->name) + 1] - '1';
#ifdef PC98
if (j < 0 || j > 7)
#else
if (j < 0 || j > 3)
#endif
continue;
s[j]++;
#endif
#ifndef PC98
if (c1->type == extended)
ret += Write_Extended(fd, d1,old,c1);
#endif
if (c1->type == freebsd)
ret += Write_FreeBSD(fd, d1,old,c1);
#ifndef __alpha__
#ifndef PC98
Write_Int32(&dp[j].dp_start, c1->offset);
Write_Int32(&dp[j].dp_size, c1->size);
#endif
i = c1->offset;
#ifdef PC98
dp[j].dp_ssect = dp[j].dp_ipl_sct = i % d1->bios_sect;
i -= dp[j].dp_ssect;
i /= d1->bios_sect;
dp[j].dp_shd = dp[j].dp_ipl_head = i % d1->bios_hd;
i -= dp[j].dp_shd;
i /= d1->bios_hd;
dp[j].dp_scyl = dp[j].dp_ipl_cyl = i;
#else
if (i >= 1024*d1->bios_sect*d1->bios_hd) {
dp[j].dp_ssect = 0xff;
dp[j].dp_shd = 0xff;
dp[j].dp_scyl = 0xff;
need_edd++;
} else {
dp[j].dp_ssect = i % d1->bios_sect;
i -= dp[j].dp_ssect++;
i /= d1->bios_sect;
dp[j].dp_shd = i % d1->bios_hd;
i -= dp[j].dp_shd;
i /= d1->bios_hd;
dp[j].dp_scyl = i;
i -= dp[j].dp_scyl;
dp[j].dp_ssect |= i >> 2;
}
#endif
#ifdef DEBUG
printf("S:%lu = (%x/%x/%x)",
c1->offset,dp[j].dp_scyl,dp[j].dp_shd,dp[j].dp_ssect);
#endif
i = c1->end;
#ifdef PC98
#if 1
dp[j].dp_esect = dp[j].dp_ehd = 0;
dp[j].dp_ecyl = i / (d1->bios_sect * d1->bios_hd);
#else
dp[j].dp_esect = i % d1->bios_sect;
i -= dp[j].dp_esect;
i /= d1->bios_sect;
dp[j].dp_ehd = i % d1->bios_hd;
i -= dp[j].dp_ehd;
i /= d1->bios_hd;
dp[j].dp_ecyl = i;
#endif
#else
dp[j].dp_esect = i % d1->bios_sect;
i -= dp[j].dp_esect++;
i /= d1->bios_sect;
dp[j].dp_ehd = i % d1->bios_hd;
i -= dp[j].dp_ehd;
i /= d1->bios_hd;
if (i>1023) i = 1023;
dp[j].dp_ecyl = i;
i -= dp[j].dp_ecyl;
dp[j].dp_esect |= i >> 2;
#endif
#ifdef DEBUG
printf(" E:%lu = (%x/%x/%x)\n",
c1->end,dp[j].dp_ecyl,dp[j].dp_ehd,dp[j].dp_esect);
#endif
#ifdef PC98
dp[j].dp_mid = c1->subtype & 0xff;
dp[j].dp_sid = c1->subtype >> 8;
if (c1->flags & CHUNK_ACTIVE)
dp[j].dp_mid |= 0x80;
strncpy(dp[j].dp_name, c1->sname, 16);
#else
dp[j].dp_typ = c1->subtype;
if (c1->flags & CHUNK_ACTIVE)
dp[j].dp_flag = 0x80;
else
dp[j].dp_flag = 0;
#endif
#endif
}
#ifndef __alpha__
j = 0;
for(i=0;i<NDOSPART;i++) {
if (!s[i])
memset(dp+i,0,sizeof *dp);
#ifndef PC98
if (dp[i].dp_flag)
j++;
#endif
}
#ifndef PC98
if (!j)
for(i=0;i<NDOSPART;i++)
if (dp[i].dp_typ == 0xa5)
dp[i].dp_flag = 0x80;
#endif
#ifdef PC98
if (d1->bootipl)
write_block(fd,WHERE(0,d1),d1->bootipl);
mbr = read_block(fd,WHERE(1,d1));
memcpy(mbr+DOSPARTOFF,dp,sizeof *dp * NDOSPART);
/* XXX - for entire FreeBSD(98) */
for (c1 = d1->chunks->part; c1; c1 = c1->next)
if (((c1->type == freebsd) || (c1->type == fat))
&& (c1->offset == 0))
PC98_EntireDisk = 1;
if (PC98_EntireDisk == 0)
write_block(fd,WHERE(1,d1),mbr);
if (d1->bootmenu)
for (i = 0; i * 512 < d1->bootmenu_size; i++)
write_block(fd,WHERE(2+i,d1),&d1->bootmenu[i * 512]);
#else
mbr = read_block(fd,WHERE(0,d1));
if (d1->bootmgr) {
memcpy(mbr,d1->bootmgr,DOSPARTOFF);
Cfg_Boot_Mgr(mbr, need_edd);
}
memcpy(mbr+DOSPARTOFF,dp,sizeof *dp * NDOSPART);
mbr[512-2] = 0x55;
mbr[512-1] = 0xaa;
write_block(fd,WHERE(0,d1),mbr);
if (d1->bootmgr && d1->bootmgr_size > 512)
for(i = 1; i * 512 <= d1->bootmgr_size; i++)
write_block(fd,WHERE(i,d1),&d1->bootmgr[i * 512]);
#endif
#endif
i = 1;
i = ioctl(fd,DIOCSYNCSLICEINFO,&i);
#ifdef DEBUG
if (i != 0)
warn("ioctl(DIOCSYNCSLICEINFO)");
#endif
ioctl(fd, DIOCWLABEL, &zero);
close(fd);
return 0;
}
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