adulau/aha
1
0
Fork 0
mirror of https://github.com/adulau/aha.git synced 2024-12-28 03:36:19 +00:00
Code Issues Projects Releases Packages Wiki Activity

GEODE: reboot fixup for geode machines with CS5536 boards

Browse source 
Writing to MSR 0x51400017 forces a hard reset on CS5536-based machines,
this has the reboot fixup do just that if such a board is detected.

Acked-by: Jordan Crouse <jordan.crouse@amd.com>
Signed-off-by: Andres Salomon <dilinger@debian.org>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Andres Salomon 2007-07-06 11:17:30 -07:00 committed by Linus Torvalds
parent 1feb17e286
commit 95069f89e8
2 changed files with 15 additions and 2 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

4
arch/i386/Kconfig
View file

@ -441,8 +441,8 @@ config X86_REBOOTFIXUPS
this config is intended, is when reboot ends with a stalled/hung
system.
Currently, the only fixup is for the Geode GX1/CS5530A/TROM2.1.
combination.
Currently, the only fixup is for the Geode machines using
CS5530A and CS5536 chipsets.
Say Y if you want to enable the fixup. Currently, it's safe to
enable this option even if you don't need it.

13
arch/i386/kernel/reboot_fixups.c
View file

@ -5,12 +5,14 @@
*
* List of supported fixups:
* geode-gx1/cs5530a - Jaya Kumar <jayalk@intworks.biz>
* geode-gx/lx/cs5536 - Andres Salomon <dilinger@debian.org>
*
*/
#include <asm/delay.h>
#include <linux/pci.h>
#include <asm/reboot_fixups.h>
#include <asm/msr.h>
static void cs5530a_warm_reset(struct pci_dev *dev)
{
@ -21,6 +23,16 @@ static void cs5530a_warm_reset(struct pci_dev *dev)
return;
}
static void cs5536_warm_reset(struct pci_dev *dev)
{
/*
* 6.6.2.12 Soft Reset (DIVIL_SOFT_RESET)
* writing 1 to the LSB of this MSR causes a hard reset.
*/
wrmsrl(0x51400017, 1ULL);
udelay(50); /* shouldn't get here but be safe and spin a while */
}
struct device_fixup {
unsigned int vendor;
unsigned int device;
@ -29,6 +41,7 @@ struct device_fixup {
static struct device_fixup fixups_table[] = {
{ PCI_VENDOR_ID_CYRIX, PCI_DEVICE_ID_CYRIX_5530_LEGACY, cs5530a_warm_reset },
{ PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_CS5536_ISA, cs5536_warm_reset },
};
/*