mirrors/Bochs
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

- add wait states during disks reset, so the BIOS can reliably detect them.

Browse Source 
patch from Adam Sulmicki.
This commit is contained in:
Christophe Bothamy 2002-10-30 21:47:11 +00:00
parent 5bc28d6dfa
commit ae220149ea
1 changed files with 31 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

37
bochs/bios/rombios.c
View File

@ -1,5 +1,5 @@
/////////////////////////////////////////////////////////////////////////
// $Id: rombios.c,v 1.74 2002-10-27 23:04:59 cbothamy Exp $
// $Id: rombios.c,v 1.75 2002-10-30 21:47:11 cbothamy Exp $
/////////////////////////////////////////////////////////////////////////
//
// Copyright (C) 2002 MandrakeSoft S.A.
@ -930,10 +930,10 @@ Bit16u cdrom_boot();
#endif // BX_ELTORITO_BOOT
static char bios_cvs_version_string[] = "$Revision: 1.74 $";
static char bios_date_string[] = "$Date: 2002-10-27 23:04:59 $";
static char bios_cvs_version_string[] = "$Revision: 1.75 $";
static char bios_date_string[] = "$Date: 2002-10-30 21:47:11 $";
static char CVSID[] = "$Id: rombios.c,v 1.74 2002-10-27 23:04:59 cbothamy Exp $";
static char CVSID[] = "$Id: rombios.c,v 1.75 2002-10-30 21:47:11 cbothamy Exp $";
/* Offset to skip the CVS $Id: prefix */
#define bios_version_string (CVSID + 4)
@ -2184,13 +2184,16 @@ void ata_detect( )
// ---------------------------------------------------------------------------
// ATA/ATAPI driver : software reset
// ---------------------------------------------------------------------------
// ATA-3
// 8.2.1 Software reset - Device 0
void ata_reset(device)
Bit16u device;
{
Bit16u ebda_seg=read_word(0x0040,0x000E);
Bit16u iobase1, iobase2;
Bit8u channel, slave;
Bit8u channel, slave, max;
Bit8u sn, sc;
channel = device / 2;
slave = device % 2;
@ -2199,24 +2202,46 @@ Bit16u device;
iobase2 = read_word(ebda_seg, &EbdaData->ata.channels[channel].iobase2);
// Reset
// 8.2.1 (a) -- set SRST in DC
outb(iobase2+ATA_CB_DC, ATA_CB_DC_HD15 | ATA_CB_DC_NIEN | ATA_CB_DC_SRST);
// 8.2.1 (b) -- wait for BSY
max=0xff;
while(max--!=0) {
Bit8u status = inb(iobase1+ATA_CB_STAT);
if ((status & ATA_CB_STAT_BSY) != 0) break;
}
// 8.2.1 (f) -- clear SRST
outb(iobase2+ATA_CB_DC, ATA_CB_DC_HD15 | ATA_CB_DC_NIEN);
if (read_byte(ebda_seg,&EbdaData->ata.devices[device].type) != ATA_TYPE_NONE) {
Bit8u sn, sc, max=0xff;
// 8.2.1 (g) -- check for sc==sn==0x01
// select device
outb(iobase1+ATA_CB_DH, slave?ATA_CB_DH_DEV1:ATA_CB_DH_DEV0);
sc = inb(iobase1+ATA_CB_SC);
sn = inb(iobase1+ATA_CB_SN);
if ( (sc==0x01) && (sn==0x01) ) {
// 8.2.1 (h) -- wait for not BSY
max=0xff;
while(max--!=0) {
Bit8u status = inb(iobase1+ATA_CB_STAT);
if ((status & ATA_CB_STAT_BSY) == 0) break;
}
}
}
// 8.2.1 (i) -- wait for DRDY
max=0xfff;
while(max--!=0) {
Bit8u status = inb(iobase1+ATA_CB_STAT);
if ((status & ATA_CB_STAT_RDY) != 0) break;
}
// Enable interrupts
outb(iobase2+ATA_CB_DC, ATA_CB_DC_HD15);
}