loader: cstyle cleanup for biosdisk.c
Also switch u_int to uint32_t. Also replace "write" by "dowrite". No functional changes intended.
This commit is contained in:
Toomas Soome
parent
91e0f2d200
commit
7bb45e615a
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=337353
@ -30,7 +30,7 @@ __FBSDID("$FreeBSD$");
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/*
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* BIOS disk device handling.
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*
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*
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* Ideas and algorithms from:
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*
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* - NetBSD libi386/biosdisk.c
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@ -50,20 +50,20 @@ __FBSDID("$FreeBSD$");
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#include "disk.h"
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#include "libi386.h"
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#define BIOS_NUMDRIVES 0x475
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#define BIOSDISK_SECSIZE 512
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#define BUFSIZE (1 * BIOSDISK_SECSIZE)
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#define BIOS_NUMDRIVES 0x475
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#define BIOSDISK_SECSIZE 512
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#define BUFSIZE (1 * BIOSDISK_SECSIZE)
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#define DT_ATAPI 0x10 /* disk type for ATAPI floppies */
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#define WDMAJOR 0 /* major numbers for devices we frontend for */
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#define WFDMAJOR 1
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#define FDMAJOR 2
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#define DAMAJOR 4
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#define DT_ATAPI 0x10 /* disk type for ATAPI floppies */
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#define WDMAJOR 0 /* major numbers for devices we frontend for */
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#define WFDMAJOR 1
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#define FDMAJOR 2
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#define DAMAJOR 4
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#ifdef DISK_DEBUG
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# define DEBUG(fmt, args...) printf("%s: " fmt "\n" , __func__ , ## args)
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#define DEBUG(fmt, args...) printf("%s: " fmt "\n", __func__, ## args)
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#else
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# define DEBUG(fmt, args...)
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#define DEBUG(fmt, args...)
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#endif
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/*
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@ -164,7 +164,7 @@ bd_init(void)
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* Check the BIOS equipment list for number
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* of fixed disks.
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*/
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if(base == 0x80 &&
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if (base == 0x80 &&
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(nfd >= *(unsigned char *)PTOV(BIOS_NUMDRIVES)))
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break;
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#endif
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@ -184,7 +184,7 @@ bd_init(void)
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}
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}
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bcache_add_dev(nbdinfo);
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return(0);
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return (0);
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}
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/*
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@ -207,7 +207,7 @@ bd_int13probe(struct bdinfo *bd)
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(v86.edx & 0xff) <= (unsigned)(bd->bd_unit & 0x7f)) /* unit # bad */
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return (0); /* skip device */
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if ((v86.ecx & 0x3f) == 0) /* absurd sector number */
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if ((v86.ecx & 0x3f) == 0) /* absurd sector number */
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ret = 0; /* set error */
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/* Convert max cyl # -> # of cylinders */
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@ -318,7 +318,7 @@ bd_print(int verbose)
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ret = disk_print(&dev, line, verbose);
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disk_close(&dev);
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if (ret != 0)
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return (ret);
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return (ret);
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}
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}
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return (ret);
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@ -410,7 +410,7 @@ bd_ioctl(struct open_file *f, u_long cmd, void *data)
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switch (cmd) {
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case DIOCGSECTORSIZE:
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*(u_int *)data = BD(dev).bd_sectorsize;
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*(uint32_t *)data = BD(dev).bd_sectorsize;
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break;
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case DIOCGMEDIASIZE:
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*(uint64_t *)data = BD(dev).bd_sectors * BD(dev).bd_sectorsize;
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@ -432,176 +432,182 @@ bd_strategy(void *devdata, int rw, daddr_t dblk, size_t size,
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bcd.dv_strategy = bd_realstrategy;
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bcd.dv_devdata = devdata;
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bcd.dv_cache = BD(dev).bd_bcache;
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return (bcache_strategy(&bcd, rw, dblk + dev->d_offset,
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size, buf, rsize));
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return (bcache_strategy(&bcd, rw, dblk + dev->d_offset, size,
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buf, rsize));
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}
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static int
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bd_realstrategy(void *devdata, int rw, daddr_t dblk, size_t size,
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char *buf, size_t *rsize)
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{
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struct disk_devdesc *dev = (struct disk_devdesc *)devdata;
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uint64_t disk_blocks;
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int blks, rc;
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struct disk_devdesc *dev = (struct disk_devdesc *)devdata;
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uint64_t disk_blocks;
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int blks, rc;
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#ifdef BD_SUPPORT_FRAGS /* XXX: sector size */
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char fragbuf[BIOSDISK_SECSIZE];
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size_t fragsize;
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char fragbuf[BIOSDISK_SECSIZE];
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size_t fragsize;
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fragsize = size % BIOSDISK_SECSIZE;
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fragsize = size % BIOSDISK_SECSIZE;
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#else
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if (size % BD(dev).bd_sectorsize)
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panic("bd_strategy: %d bytes I/O not multiple of block size", size);
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if (size % BD(dev).bd_sectorsize) {
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panic("bd_strategy: %d bytes I/O not multiple of block size",
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size);
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}
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#endif
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DEBUG("open_disk %p", dev);
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DEBUG("open_disk %p", dev);
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/*
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* Check the value of the size argument. We do have quite small
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* heap (64MB), but we do not know good upper limit, so we check against
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* INT_MAX here. This will also protect us against possible overflows
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* while translating block count to bytes.
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*/
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if (size > INT_MAX) {
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DEBUG("too large read: %zu bytes", size);
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return (EIO);
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}
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blks = size / BD(dev).bd_sectorsize;
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if (dblk > dblk + blks)
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return (EIO);
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if (rsize)
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*rsize = 0;
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/* Get disk blocks, this value is either for whole disk or for partition */
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if (disk_ioctl(dev, DIOCGMEDIASIZE, &disk_blocks) == 0) {
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/* DIOCGMEDIASIZE returns bytes. */
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disk_blocks /= BD(dev).bd_sectorsize;
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} else {
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/* We should not get here. Just try to survive. */
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disk_blocks = BD(dev).bd_sectors - dev->d_offset;
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}
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/* Validate source block address. */
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if (dblk < dev->d_offset || dblk >= dev->d_offset + disk_blocks)
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return (EIO);
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/*
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* Truncate if we are crossing disk or partition end.
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*/
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if (dblk + blks >= dev->d_offset + disk_blocks) {
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blks = dev->d_offset + disk_blocks - dblk;
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size = blks * BD(dev).bd_sectorsize;
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DEBUG("short read %d", blks);
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}
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switch (rw & F_MASK) {
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case F_READ:
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DEBUG("read %d from %lld to %p", blks, dblk, buf);
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if (blks && (rc = bd_read(dev, dblk, blks, buf))) {
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/* Filter out floppy controller errors */
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if (BD(dev).bd_flags != BD_FLOPPY || rc != 0x20) {
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printf("read %d from %lld to %p, error: 0x%x\n", blks, dblk,
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buf, rc);
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}
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return (EIO);
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/*
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* Check the value of the size argument. We do have quite small
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* heap (64MB), but we do not know good upper limit, so we check against
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* INT_MAX here. This will also protect us against possible overflows
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* while translating block count to bytes.
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*/
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if (size > INT_MAX) {
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DEBUG("too large read: %zu bytes", size);
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return (EIO);
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}
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blks = size / BD(dev).bd_sectorsize;
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if (dblk > dblk + blks)
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return (EIO);
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if (rsize)
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*rsize = 0;
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/*
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* Get disk blocks, this value is either for whole disk or for
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* partition.
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*/
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if (disk_ioctl(dev, DIOCGMEDIASIZE, &disk_blocks) == 0) {
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/* DIOCGMEDIASIZE returns bytes. */
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disk_blocks /= BD(dev).bd_sectorsize;
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} else {
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/* We should not get here. Just try to survive. */
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disk_blocks = BD(dev).bd_sectors - dev->d_offset;
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}
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/* Validate source block address. */
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if (dblk < dev->d_offset || dblk >= dev->d_offset + disk_blocks)
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return (EIO);
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/*
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* Truncate if we are crossing disk or partition end.
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*/
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if (dblk + blks >= dev->d_offset + disk_blocks) {
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blks = dev->d_offset + disk_blocks - dblk;
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size = blks * BD(dev).bd_sectorsize;
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DEBUG("short read %d", blks);
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}
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switch (rw & F_MASK) {
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case F_READ:
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DEBUG("read %d from %lld to %p", blks, dblk, buf);
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if (blks && (rc = bd_read(dev, dblk, blks, buf))) {
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/* Filter out floppy controller errors */
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if (BD(dev).bd_flags != BD_FLOPPY || rc != 0x20) {
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printf("read %d from %lld to %p, error: 0x%x\n",
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blks, dblk, buf, rc);
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}
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return (EIO);
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}
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#ifdef BD_SUPPORT_FRAGS /* XXX: sector size */
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DEBUG("bd_strategy: frag read %d from %d+%d to %p",
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fragsize, dblk, blks, buf + (blks * BIOSDISK_SECSIZE));
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if (fragsize && bd_read(od, dblk + blks, 1, fragsize)) {
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DEBUG("frag read error");
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return(EIO);
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}
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bcopy(fragbuf, buf + (blks * BIOSDISK_SECSIZE), fragsize);
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DEBUG("bd_strategy: frag read %d from %d+%d to %p",
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fragsize, dblk, blks, buf + (blks * BIOSDISK_SECSIZE));
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if (fragsize && bd_read(od, dblk + blks, 1, fragsize)) {
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DEBUG("frag read error");
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return (EIO);
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}
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bcopy(fragbuf, buf + (blks * BIOSDISK_SECSIZE), fragsize);
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#endif
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break;
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case F_WRITE :
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DEBUG("write %d from %lld to %p", blks, dblk, buf);
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break;
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case F_WRITE :
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DEBUG("write %d from %lld to %p", blks, dblk, buf);
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if (blks && bd_write(dev, dblk, blks, buf)) {
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DEBUG("write error");
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return (EIO);
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}
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if (blks && bd_write(dev, dblk, blks, buf)) {
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DEBUG("write error");
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return (EIO);
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}
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#ifdef BD_SUPPORT_FRAGS
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if(fragsize) {
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DEBUG("Attempted to write a frag");
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return (EIO);
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}
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if (fragsize) {
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DEBUG("Attempted to write a frag");
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return (EIO);
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}
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#endif
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break;
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default:
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/* DO NOTHING */
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return (EROFS);
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}
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break;
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default:
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/* DO NOTHING */
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return (EROFS);
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}
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if (rsize)
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*rsize = size;
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return (0);
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if (rsize)
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*rsize = size;
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return (0);
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}
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static int
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bd_edd_io(struct disk_devdesc *dev, daddr_t dblk, int blks, caddr_t dest,
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int write)
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int dowrite)
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{
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static struct edd_packet packet;
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static struct edd_packet packet;
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packet.len = sizeof(struct edd_packet);
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packet.count = blks;
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packet.off = VTOPOFF(dest);
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packet.seg = VTOPSEG(dest);
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packet.lba = dblk;
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v86.ctl = V86_FLAGS;
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v86.addr = 0x13;
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if (write)
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packet.len = sizeof(struct edd_packet);
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packet.count = blks;
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packet.off = VTOPOFF(dest);
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packet.seg = VTOPSEG(dest);
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packet.lba = dblk;
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v86.ctl = V86_FLAGS;
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v86.addr = 0x13;
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/* Should we Write with verify ?? 0x4302 ? */
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v86.eax = 0x4300;
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else
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v86.eax = 0x4200;
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v86.edx = BD(dev).bd_unit;
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v86.ds = VTOPSEG(&packet);
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v86.esi = VTOPOFF(&packet);
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v86int();
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if (V86_CY(v86.efl))
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return (v86.eax >> 8);
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return (0);
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if (dowrite)
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v86.eax = 0x4300;
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else
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v86.eax = 0x4200;
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v86.edx = BD(dev).bd_unit;
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v86.ds = VTOPSEG(&packet);
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v86.esi = VTOPOFF(&packet);
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v86int();
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if (V86_CY(v86.efl))
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return (v86.eax >> 8);
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return (0);
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}
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static int
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bd_chs_io(struct disk_devdesc *dev, daddr_t dblk, int blks, caddr_t dest,
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int write)
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int dowrite)
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{
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u_int x, bpc, cyl, hd, sec;
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uint32_t x, bpc, cyl, hd, sec;
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bpc = BD(dev).bd_sec * BD(dev).bd_hds; /* blocks per cylinder */
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x = dblk;
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cyl = x / bpc; /* block # / blocks per cylinder */
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x %= bpc; /* block offset into cylinder */
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hd = x / BD(dev).bd_sec; /* offset / blocks per track */
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sec = x % BD(dev).bd_sec; /* offset into track */
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bpc = BD(dev).bd_sec * BD(dev).bd_hds; /* blocks per cylinder */
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x = dblk;
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cyl = x / bpc; /* block # / blocks per cylinder */
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x %= bpc; /* block offset into cylinder */
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hd = x / BD(dev).bd_sec; /* offset / blocks per track */
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sec = x % BD(dev).bd_sec; /* offset into track */
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/* correct sector number for 1-based BIOS numbering */
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sec++;
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/* correct sector number for 1-based BIOS numbering */
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sec++;
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if (cyl > 1023)
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/* CHS doesn't support cylinders > 1023. */
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return (1);
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if (cyl > 1023) {
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/* CHS doesn't support cylinders > 1023. */
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return (1);
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}
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v86.ctl = V86_FLAGS;
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v86.addr = 0x13;
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if (write)
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v86.eax = 0x300 | blks;
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else
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v86.eax = 0x200 | blks;
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v86.ecx = ((cyl & 0xff) << 8) | ((cyl & 0x300) >> 2) | sec;
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v86.edx = (hd << 8) | BD(dev).bd_unit;
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v86.es = VTOPSEG(dest);
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v86.ebx = VTOPOFF(dest);
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v86int();
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if (V86_CY(v86.efl))
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return (v86.eax >> 8);
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return (0);
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v86.ctl = V86_FLAGS;
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v86.addr = 0x13;
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if (dowrite)
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v86.eax = 0x300 | blks;
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else
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v86.eax = 0x200 | blks;
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v86.ecx = ((cyl & 0xff) << 8) | ((cyl & 0x300) >> 2) | sec;
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v86.edx = (hd << 8) | BD(dev).bd_unit;
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v86.es = VTOPSEG(dest);
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v86.ebx = VTOPOFF(dest);
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v86int();
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if (V86_CY(v86.efl))
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return (v86.eax >> 8);
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return (0);
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}
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static void
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@ -614,111 +620,112 @@ bd_io_workaround(struct disk_devdesc *dev)
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static int
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bd_io(struct disk_devdesc *dev, daddr_t dblk, int blks, caddr_t dest, int write)
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bd_io(struct disk_devdesc *dev, daddr_t dblk, int blks, caddr_t dest,
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int dowrite)
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{
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u_int x, sec, result, resid, retry, maxfer;
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caddr_t p, xp, bbuf;
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u_int x, sec, result, resid, retry, maxfer;
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caddr_t p, xp, bbuf;
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/* Just in case some idiot actually tries to read/write -1 blocks... */
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if (blks < 0)
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return (-1);
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/* Just in case some idiot actually tries to read/write -1 blocks... */
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if (blks < 0)
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return (-1);
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resid = blks;
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p = dest;
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resid = blks;
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p = dest;
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/*
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* Workaround for a problem with some HP ProLiant BIOS failing to work out
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* the boot disk after installation. hrs and kuriyama discovered this
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* problem with an HP ProLiant DL320e Gen 8 with a 3TB HDD, and discovered
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* that an int13h call seems to cause a buffer overrun in the bios. The
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* problem is alleviated by doing an extra read before the buggy read. It
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* is not immediately known whether other models are similarly affected.
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*/
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if (dblk >= 0x100000000)
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bd_io_workaround(dev);
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/* Decide whether we have to bounce */
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if (VTOP(dest) >> 20 != 0 || (BD(dev).bd_unit < 0x80 &&
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(VTOP(dest) >> 16) != (VTOP(dest +
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blks * BD(dev).bd_sectorsize) >> 16))) {
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/*
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* There is a 64k physical boundary somewhere in the
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* destination buffer, or the destination buffer is above
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* first 1MB of physical memory so we have to arrange a
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* suitable bounce buffer. Allocate a buffer twice as large
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* as we need to. Use the bottom half unless there is a break
|
||||
* there, in which case we use the top half.
|
||||
/*
|
||||
* Workaround for a problem with some HP ProLiant BIOS failing to work
|
||||
* out the boot disk after installation. hrs and kuriyama discovered
|
||||
* this problem with an HP ProLiant DL320e Gen 8 with a 3TB HDD, and
|
||||
* discovered that an int13h call seems to cause a buffer overrun in
|
||||
* the bios. The problem is alleviated by doing an extra read before
|
||||
* the buggy read. It is not immediately known whether other models
|
||||
* are similarly affected.
|
||||
*/
|
||||
x = V86_IO_BUFFER_SIZE / BD(dev).bd_sectorsize;
|
||||
x = min(x, (unsigned)blks);
|
||||
bbuf = PTOV(V86_IO_BUFFER);
|
||||
maxfer = x; /* limit transfers to bounce region size */
|
||||
} else {
|
||||
bbuf = NULL;
|
||||
maxfer = 0;
|
||||
}
|
||||
if (dblk >= 0x100000000)
|
||||
bd_io_workaround(dev);
|
||||
|
||||
/* Decide whether we have to bounce */
|
||||
if (VTOP(dest) >> 20 != 0 || (BD(dev).bd_unit < 0x80 &&
|
||||
(VTOP(dest) >> 16) !=
|
||||
(VTOP(dest + blks * BD(dev).bd_sectorsize) >> 16))) {
|
||||
|
||||
/*
|
||||
* There is a 64k physical boundary somewhere in the
|
||||
* destination buffer, or the destination buffer is above
|
||||
* first 1MB of physical memory so we have to arrange a
|
||||
* suitable bounce buffer. Allocate a buffer twice as large
|
||||
* as we need to. Use the bottom half unless there is a break
|
||||
* there, in which case we use the top half.
|
||||
*/
|
||||
x = V86_IO_BUFFER_SIZE / BD(dev).bd_sectorsize;
|
||||
x = min(x, (unsigned)blks);
|
||||
bbuf = PTOV(V86_IO_BUFFER);
|
||||
maxfer = x; /* limit transfers to bounce region size */
|
||||
} else {
|
||||
bbuf = NULL;
|
||||
maxfer = 0;
|
||||
}
|
||||
|
||||
while (resid > 0) {
|
||||
/*
|
||||
* Play it safe and don't cross track boundaries.
|
||||
* (XXX this is probably unnecessary)
|
||||
*/
|
||||
sec = dblk % BD(dev).bd_sec; /* offset into track */
|
||||
x = min(BD(dev).bd_sec - sec, resid);
|
||||
if (maxfer > 0)
|
||||
x = min(x, maxfer); /* fit bounce buffer */
|
||||
while (resid > 0) {
|
||||
/*
|
||||
* Play it safe and don't cross track boundaries.
|
||||
* (XXX this is probably unnecessary)
|
||||
*/
|
||||
sec = dblk % BD(dev).bd_sec; /* offset into track */
|
||||
x = min(BD(dev).bd_sec - sec, resid);
|
||||
if (maxfer > 0)
|
||||
x = min(x, maxfer); /* fit bounce buffer */
|
||||
|
||||
/* where do we transfer to? */
|
||||
xp = bbuf == NULL ? p : bbuf;
|
||||
/* where do we transfer to? */
|
||||
xp = bbuf == NULL ? p : bbuf;
|
||||
|
||||
/*
|
||||
* Put your Data In, Put your Data out,
|
||||
* Put your Data In, and shake it all about
|
||||
*/
|
||||
if (write && bbuf != NULL)
|
||||
bcopy(p, bbuf, x * BD(dev).bd_sectorsize);
|
||||
/*
|
||||
* Put your Data In, Put your Data out,
|
||||
* Put your Data In, and shake it all about
|
||||
*/
|
||||
if (dowrite && bbuf != NULL)
|
||||
bcopy(p, bbuf, x * BD(dev).bd_sectorsize);
|
||||
|
||||
/*
|
||||
* Loop retrying the operation a couple of times. The BIOS
|
||||
* may also retry.
|
||||
*/
|
||||
for (retry = 0; retry < 3; retry++) {
|
||||
/* if retrying, reset the drive */
|
||||
if (retry > 0) {
|
||||
v86.ctl = V86_FLAGS;
|
||||
v86.addr = 0x13;
|
||||
v86.eax = 0;
|
||||
v86.edx = BD(dev).bd_unit;
|
||||
v86int();
|
||||
}
|
||||
/*
|
||||
* Loop retrying the operation a couple of times. The BIOS
|
||||
* may also retry.
|
||||
*/
|
||||
for (retry = 0; retry < 3; retry++) {
|
||||
/* if retrying, reset the drive */
|
||||
if (retry > 0) {
|
||||
v86.ctl = V86_FLAGS;
|
||||
v86.addr = 0x13;
|
||||
v86.eax = 0;
|
||||
v86.edx = BD(dev).bd_unit;
|
||||
v86int();
|
||||
}
|
||||
|
||||
if (BD(dev).bd_flags & BD_MODEEDD1)
|
||||
result = bd_edd_io(dev, dblk, x, xp, write);
|
||||
else
|
||||
result = bd_chs_io(dev, dblk, x, xp, write);
|
||||
if (result == 0)
|
||||
break;
|
||||
if (BD(dev).bd_flags & BD_MODEEDD1)
|
||||
result = bd_edd_io(dev, dblk, x, xp, write);
|
||||
else
|
||||
result = bd_chs_io(dev, dblk, x, xp, write);
|
||||
if (result == 0)
|
||||
break;
|
||||
}
|
||||
|
||||
if (dowrite)
|
||||
DEBUG("Write %d sector(s) from %p (0x%x) to %lld %s", x,
|
||||
p, VTOP(p), dblk, result ? "failed" : "ok");
|
||||
else
|
||||
DEBUG("Read %d sector(s) from %lld to %p (0x%x) %s", x,
|
||||
dblk, p, VTOP(p), result ? "failed" : "ok");
|
||||
if (result) {
|
||||
return (result);
|
||||
}
|
||||
if (!dowrite && bbuf != NULL)
|
||||
bcopy(bbuf, p, x * BD(dev).bd_sectorsize);
|
||||
p += (x * BD(dev).bd_sectorsize);
|
||||
dblk += x;
|
||||
resid -= x;
|
||||
}
|
||||
|
||||
if (write)
|
||||
DEBUG("Write %d sector(s) from %p (0x%x) to %lld %s", x,
|
||||
p, VTOP(p), dblk, result ? "failed" : "ok");
|
||||
else
|
||||
DEBUG("Read %d sector(s) from %lld to %p (0x%x) %s", x,
|
||||
dblk, p, VTOP(p), result ? "failed" : "ok");
|
||||
if (result) {
|
||||
return (result);
|
||||
}
|
||||
if (!write && bbuf != NULL)
|
||||
bcopy(bbuf, p, x * BD(dev).bd_sectorsize);
|
||||
p += (x * BD(dev).bd_sectorsize);
|
||||
dblk += x;
|
||||
resid -= x;
|
||||
}
|
||||
|
||||
/* hexdump(dest, (blks * BD(dev).bd_sectorsize)); */
|
||||
return(0);
|
||||
return (0);
|
||||
}
|
||||
|
||||
static int
|
||||
@ -753,15 +760,15 @@ uint32_t
|
||||
bd_getbigeom(int bunit)
|
||||
{
|
||||
|
||||
v86.ctl = V86_FLAGS;
|
||||
v86.addr = 0x13;
|
||||
v86.eax = 0x800;
|
||||
v86.edx = 0x80 + bunit;
|
||||
v86int();
|
||||
if (V86_CY(v86.efl))
|
||||
return 0x4f010f;
|
||||
return ((v86.ecx & 0xc0) << 18) | ((v86.ecx & 0xff00) << 8) |
|
||||
(v86.edx & 0xff00) | (v86.ecx & 0x3f);
|
||||
v86.ctl = V86_FLAGS;
|
||||
v86.addr = 0x13;
|
||||
v86.eax = 0x800;
|
||||
v86.edx = 0x80 + bunit;
|
||||
v86int();
|
||||
if (V86_CY(v86.efl))
|
||||
return (0x4f010f);
|
||||
return (((v86.ecx & 0xc0) << 18) | ((v86.ecx & 0xff00) << 8) |
|
||||
(v86.edx & 0xff00) | (v86.ecx & 0x3f));
|
||||
}
|
||||
|
||||
/*
|
||||
@ -773,49 +780,49 @@ bd_getbigeom(int bunit)
|
||||
int
|
||||
bd_getdev(struct i386_devdesc *d)
|
||||
{
|
||||
struct disk_devdesc *dev;
|
||||
int biosdev;
|
||||
int major;
|
||||
int rootdev;
|
||||
char *nip, *cp;
|
||||
int i, unit;
|
||||
struct disk_devdesc *dev;
|
||||
int biosdev;
|
||||
int major;
|
||||
int rootdev;
|
||||
char *nip, *cp;
|
||||
int i, unit;
|
||||
|
||||
dev = (struct disk_devdesc *)d;
|
||||
biosdev = bd_unit2bios(dev->dd.d_unit);
|
||||
DEBUG("unit %d BIOS device %d", dev->dd.d_unit, biosdev);
|
||||
if (biosdev == -1) /* not a BIOS device */
|
||||
return(-1);
|
||||
if (disk_open(dev, BD(dev).bd_sectors * BD(dev).bd_sectorsize,
|
||||
BD(dev).bd_sectorsize) != 0) /* oops, not a viable device */
|
||||
return (-1);
|
||||
else
|
||||
disk_close(dev);
|
||||
dev = (struct disk_devdesc *)d;
|
||||
biosdev = bd_unit2bios(dev->dd.d_unit);
|
||||
DEBUG("unit %d BIOS device %d", dev->dd.d_unit, biosdev);
|
||||
if (biosdev == -1) /* not a BIOS device */
|
||||
return (-1);
|
||||
if (disk_open(dev, BD(dev).bd_sectors * BD(dev).bd_sectorsize,
|
||||
BD(dev).bd_sectorsize) != 0) /* oops, not a viable device */
|
||||
return (-1);
|
||||
else
|
||||
disk_close(dev);
|
||||
|
||||
if (biosdev < 0x80) {
|
||||
/* floppy (or emulated floppy) or ATAPI device */
|
||||
if (bdinfo[dev->dd.d_unit].bd_type == DT_ATAPI) {
|
||||
/* is an ATAPI disk */
|
||||
major = WFDMAJOR;
|
||||
if (biosdev < 0x80) {
|
||||
/* floppy (or emulated floppy) or ATAPI device */
|
||||
if (bdinfo[dev->dd.d_unit].bd_type == DT_ATAPI) {
|
||||
/* is an ATAPI disk */
|
||||
major = WFDMAJOR;
|
||||
} else {
|
||||
/* is a floppy disk */
|
||||
major = FDMAJOR;
|
||||
}
|
||||
} else {
|
||||
/* is a floppy disk */
|
||||
major = FDMAJOR;
|
||||
/* assume an IDE disk */
|
||||
major = WDMAJOR;
|
||||
}
|
||||
} else {
|
||||
/* assume an IDE disk */
|
||||
major = WDMAJOR;
|
||||
}
|
||||
/* default root disk unit number */
|
||||
unit = biosdev & 0x7f;
|
||||
/* default root disk unit number */
|
||||
unit = biosdev & 0x7f;
|
||||
|
||||
/* XXX a better kludge to set the root disk unit number */
|
||||
if ((nip = getenv("root_disk_unit")) != NULL) {
|
||||
i = strtol(nip, &cp, 0);
|
||||
/* check for parse error */
|
||||
if ((cp != nip) && (*cp == 0))
|
||||
unit = i;
|
||||
}
|
||||
/* XXX a better kludge to set the root disk unit number */
|
||||
if ((nip = getenv("root_disk_unit")) != NULL) {
|
||||
i = strtol(nip, &cp, 0);
|
||||
/* check for parse error */
|
||||
if ((cp != nip) && (*cp == 0))
|
||||
unit = i;
|
||||
}
|
||||
|
||||
rootdev = MAKEBOOTDEV(major, dev->d_slice + 1, unit, dev->d_partition);
|
||||
DEBUG("dev is 0x%x\n", rootdev);
|
||||
return(rootdev);
|
||||
rootdev = MAKEBOOTDEV(major, dev->d_slice + 1, unit, dev->d_partition);
|
||||
DEBUG("dev is 0x%x\n", rootdev);
|
||||
return (rootdev);
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user