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Always use 64-bit LBAs for disk addresses in zfsboot and gptzfsboot to

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fully support booting from large volumes.

Tested by:	Emil Smolenski  ambsd of raisa.eu.org
Submitted by:	Matt Reimer  mattjreimer of gmail (most of the C bits)
MFC after:	1 week
This commit is contained in:
John Baldwin 2009-11-20 12:48:35 +00:00
parent 7fb4357098
commit c6858769af
2 changed files with 14 additions and 14 deletions
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11
sys/boot/i386/zfsboot/zfsboot.c
View File

@ -138,8 +138,8 @@ struct dsk {
unsigned unit;
unsigned slice;
unsigned part;
unsigned start;
int init;
daddr_t start;
};
static char cmd[512];
static char kname[1024];
@ -163,7 +163,7 @@ static int parse(void);
static void printf(const char *,...);
static void putchar(int);
static uint32_t memsize(void);
static int drvread(struct dsk *, void *, unsigned, unsigned);
static int drvread(struct dsk *, void *, daddr_t, unsigned);
static int keyhit(unsigned);
static int xputc(int);
static int xgetc(int);
@ -310,7 +310,8 @@ static int
vdev_read(vdev_t *vdev, void *priv, off_t off, void *buf, size_t bytes)
{
char *p;
unsigned int lba, nb;
daddr_t lba;
unsigned int nb;
struct dsk *dsk = (struct dsk *) priv;
if ((off & (DEV_BSIZE - 1)) || (bytes & (DEV_BSIZE - 1)))
@ -964,7 +965,7 @@ static struct {
#endif
static int
drvread(struct dsk *dsk, void *buf, unsigned lba, unsigned nblk)
drvread(struct dsk *dsk, void *buf, daddr_t lba, unsigned nblk)
{
#ifdef GPT
static unsigned c = 0x2d5c7c2f;
@ -999,7 +1000,7 @@ drvread(struct dsk *dsk, void *buf, unsigned lba, unsigned nblk)
v86.es = VTOPSEG(buf);
v86.eax = lba;
v86.ebx = VTOPOFF(buf);
v86.ecx = lba >> 16;
v86.ecx = lba >> 32;
v86.edx = nblk << 8 | dsk->drive;
v86int();
v86.ctl = V86_FLAGS;

17
sys/boot/i386/zfsboot/zfsldr.S
View File

@ -83,7 +83,7 @@ ebpb: .byte 0 # BIOS physical drive number (W)
* Trampoline used by boot2 to call read to read data from the disk via
* the BIOS. Call with:
*
* %cx:%ax - long - LBA to read in
* %ecx:%eax - long - LBA to read in
* %es:(%bx) - caddr_t - buffer to read data into
* %dl - byte - drive to read from
* %dh - byte - num sectors to read
@ -94,10 +94,8 @@ xread: push %ss # Address
/*
* Setup an EDD disk packet and pass it to read
*/
xread.1: # Starting
pushl $0x0 # absolute
push %cx # block
push %ax # number
xread.1: pushl %ecx # Starting absolute block
pushl %eax # block number
push %es # Address of
push %bx # transfer buffer
xor %ax,%ax # Number of
@ -195,7 +193,7 @@ main.4: xor %dx,%dx # Partition:drive
*/
main.5: mov %dx,MEM_ARG # Save args
movb $NSECT,%dh # Sector count
movw $1024,%ax # Offset to boot2
movl $1024,%eax # Offset to boot2
callw nread.1 # Read disk
main.6: mov $MEM_BUF,%si # BTX (before reloc)
mov 0xa(%si),%bx # Get BTX length and set
@ -245,10 +243,11 @@ seta20.3: sti # Enable interrupts
/*
* Trampoline used to call read from within boot1.
*/
nread: xor %ax,%ax # Sector offset in partition
nread: xor %eax,%eax # Sector offset in partition
nread.1: mov $MEM_BUF,%bx # Transfer buffer
add 0x8(%si),%ax # Get
mov 0xa(%si),%cx # LBA
xor %ecx,%ecx # Get
addl 0x8(%si),%eax # LBA
adc $0,%ecx
push %cs # Read from
callw xread.1 # disk
jnc return # If success, return