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- implemented LBA48 support (since BIOS functions are limited to 32 bit, the

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max. disk size is now 2 TB)
This commit is contained in:
Volker Ruppert 2008-01-14 19:11:15 +00:00
parent 9e53b71a55
commit 0a8105e95e
3 changed files with 38 additions and 18 deletions
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bochs/bios/BIOS-bochs-latest
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bochs/bios/rombios.c
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@ -1,5 +1,5 @@
/////////////////////////////////////////////////////////////////////////
// $Id: rombios.c,v 1.195 2008-01-06 21:00:18 sshwarts Exp $
// $Id: rombios.c,v 1.196 2008-01-14 19:10:37 vruppert Exp $
/////////////////////////////////////////////////////////////////////////
//
// Copyright (C) 2002 MandrakeSoft S.A.
@ -944,7 +944,7 @@ Bit16u cdrom_boot();
#endif // BX_ELTORITO_BOOT
static char bios_cvs_version_string[] = "$Revision: 1.195 $ $Date: 2008-01-06 21:00:18 $";
static char bios_cvs_version_string[] = "$Revision: 1.196 $ $Date: 2008-01-14 19:10:37 $";
#define BIOS_COPYRIGHT_STRING "(c) 2002 MandrakeSoft S.A. Written by Kevin Lawton & the Bochs team."
@ -2656,14 +2656,6 @@ Bit32u lba;
if (mode == ATA_MODE_PIO32) blksize>>=2;
else blksize>>=1;
//!!FIXME!! this only works up to 28-bit LBA
// sector will be 0 only on lba access. Convert to lba-chs
if (sector == 0) {
sector = (Bit16u) (lba & 0x000000ffL);
cylinder = (Bit16u) ((lba>>8) & 0x0000ffffL);
head = ((Bit16u) ((lba>>24) & 0x0000000fL)) | ATA_CB_DH_LBA;
}
// Reset count of transferred data
write_word(ebda_seg, &EbdaData->ata.trsfsectors,0);
write_dword(ebda_seg, &EbdaData->ata.trsfbytes,0L);
@ -2673,6 +2665,24 @@ Bit32u lba;
if (status & ATA_CB_STAT_BSY) return 1;
outb(iobase2 + ATA_CB_DC, ATA_CB_DC_HD15 | ATA_CB_DC_NIEN);
// sector will be 0 only on lba access. Convert to lba-chs
if (sector == 0) {
if ((count >= 1 << 8) || (lba + count >= 1UL << 28)) {
outb(iobase1 + ATA_CB_FR, 0x00);
outb(iobase1 + ATA_CB_SC, (count >> 8) & 0xff);
outb(iobase1 + ATA_CB_SN, lba >> 24);
outb(iobase1 + ATA_CB_CL, 0);
outb(iobase1 + ATA_CB_CH, 0);
command |= 0x04;
count &= (1UL << 8) - 1;
lba &= (1UL << 24) - 1;
}
sector = (Bit16u) (lba & 0x000000ffL);
cylinder = (Bit16u) ((lba>>8) & 0x0000ffffL);
head = ((Bit16u) ((lba>>24) & 0x0000000fL)) | ATA_CB_DH_LBA;
}
outb(iobase1 + ATA_CB_FR, 0x00);
outb(iobase1 + ATA_CB_SC, count);
outb(iobase1 + ATA_CB_SN, sector);
@ -2797,14 +2807,6 @@ Bit32u lba;
if (mode == ATA_MODE_PIO32) blksize>>=2;
else blksize>>=1;
//!!FIXME!! this only works up to 28-bit LBA
// sector will be 0 only on lba access. Convert to lba-chs
if (sector == 0) {
sector = (Bit16u) (lba & 0x000000ffL);
cylinder = (Bit16u) ((lba>>8) & 0x0000ffffL);
head = ((Bit16u) ((lba>>24) & 0x0000000fL)) | ATA_CB_DH_LBA;
}
// Reset count of transferred data
write_word(ebda_seg, &EbdaData->ata.trsfsectors,0);
write_dword(ebda_seg, &EbdaData->ata.trsfbytes,0L);
@ -2814,6 +2816,24 @@ Bit32u lba;
if (status & ATA_CB_STAT_BSY) return 1;
outb(iobase2 + ATA_CB_DC, ATA_CB_DC_HD15 | ATA_CB_DC_NIEN);
// sector will be 0 only on lba access. Convert to lba-chs
if (sector == 0) {
if ((count >= 1 << 8) || (lba + count >= 1UL << 28)) {
outb(iobase1 + ATA_CB_FR, 0x00);
outb(iobase1 + ATA_CB_SC, (count >> 8) & 0xff);
outb(iobase1 + ATA_CB_SN, lba >> 24);
outb(iobase1 + ATA_CB_CL, 0);
outb(iobase1 + ATA_CB_CH, 0);
command |= 0x04;
count &= (1UL << 8) - 1;
lba &= (1UL << 24) - 1;
}
sector = (Bit16u) (lba & 0x000000ffL);
cylinder = (Bit16u) ((lba>>8) & 0x0000ffffL);
head = ((Bit16u) ((lba>>24) & 0x0000000fL)) | ATA_CB_DH_LBA;
}
outb(iobase1 + ATA_CB_FR, 0x00);
outb(iobase1 + ATA_CB_SC, count);
outb(iobase1 + ATA_CB_SN, sector);