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hd-geometry: Compute BIOS CHS translation in one place

Browse source 
Currently, it is split between hd_geometry_guess() and
pc_cmos_init_late().  Confusing.  info qtree shows the result of the
former.  Also confusing.

Fold the part done in pc_cmos_init_late() into hd_geometry_guess().

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Markus Armbruster 2012-07-10 11:12:53 +02:00 committed by Kevin Wolf
parent 4e4e6e319b
commit 2adc99b277
5 changed files with 18 additions and 16 deletions
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1
hw/block-common.h
View file

@ -24,5 +24,6 @@
void hd_geometry_guess(BlockDriverState *bs,
uint32_t *pcyls, uint32_t *pheads, uint32_t *psecs,
int *ptrans);
int hd_bios_chs_auto_trans(uint32_t cyls, uint32_t heads, uint32_t secs);
#endif

9
hw/hd-geometry.c
View file

@ -125,7 +125,7 @@ void hd_geometry_guess(BlockDriverState *bs,
if (guess_disk_lchs(bs, &cylinders, &heads, &secs) < 0) {
/* no LCHS guess: use a standard physical disk geometry */
guess_chs_for_size(bs, pcyls, pheads, psecs);
translation = BIOS_ATA_TRANSLATION_AUTO;
translation = hd_bios_chs_auto_trans(*pcyls, *pheads, *psecs);
} else if (heads > 16) {
/* LCHS guess with heads > 16 means that a BIOS LBA
translation was active, so a standard physical disk
@ -148,3 +148,10 @@ void hd_geometry_guess(BlockDriverState *bs,
}
trace_hd_geometry_guess(bs, *pcyls, *pheads, *psecs, translation);
}
int hd_bios_chs_auto_trans(uint32_t cyls, uint32_t heads, uint32_t secs)
{
return cyls <= 1024 && heads <= 16 && secs <= 63
? BIOS_ATA_TRANSLATION_NONE
: BIOS_ATA_TRANSLATION_LBA;
}

2
hw/ide/core.c
View file

@ -2091,6 +2091,8 @@ void ide_init2_with_non_qdev_drives(IDEBus *bus, DriveInfo *hd0,
trans = dinfo->trans;
if (!cyls && !heads && !secs) {
hd_geometry_guess(dinfo->bdrv, &cyls, &heads, &secs, &trans);
} else if (trans == BIOS_ATA_TRANSLATION_AUTO) {
trans = hd_bios_chs_auto_trans(cyls, heads, secs);
}
if (ide_init_drive(&bus->ifs[i], dinfo->bdrv,
dinfo->media_cd ? IDE_CD : IDE_HD, NULL,

3
hw/ide/qdev.c
View file

@ -171,6 +171,9 @@ static int ide_dev_initfn(IDEDevice *dev, IDEDriveKind kind)
hd_geometry_guess(dev->conf.bs,
&dev->conf.cyls, &dev->conf.heads, &dev->conf.secs,
&dev->chs_trans);
} else if (dev->chs_trans == BIOS_ATA_TRANSLATION_AUTO) {
dev->chs_trans = hd_bios_chs_auto_trans(dev->conf.cyls,
dev->conf.heads, dev->conf.secs);
}
if (ide_init_drive(s, dev->conf.bs, kind,

19
hw/pc.c
View file

@ -290,7 +290,7 @@ static void pc_cmos_init_late(void *opaque)
int16_t cylinders;
int8_t heads, sectors;
int val;
int i;
int i, trans;
val = 0;
if (ide_get_geometry(arg->idebus[0], 0,
@ -313,20 +313,9 @@ static void pc_cmos_init_late(void *opaque)
geometry can be different if a translation is done. */
if (ide_get_geometry(arg->idebus[i / 2], i % 2,
&cylinders, &heads, &sectors) >= 0) {
int translation = ide_get_bios_chs_trans(arg->idebus[i / 2],
i % 2);
if (translation == BIOS_ATA_TRANSLATION_AUTO) {
if (cylinders <= 1024 && heads <= 16 && sectors <= 63) {
/* No translation. */
translation = 0;
} else {
/* LBA translation. */
translation = 1;
}
} else {
translation--;
}
val |= translation << (i * 2);
trans = ide_get_bios_chs_trans(arg->idebus[i / 2], i % 2) - 1;
assert((trans & ~3) == 0);
val |= trans << (i * 2);
}
}
rtc_set_memory(s, 0x39, val);