diff --git a/arch/i386/Kconfig b/arch/i386/Kconfig index d2f6a247414dd2c224a3ebdfec052a4d87d826ee..b1b2b30b1b8e82910df72f8ba49227b46e1c1878 100644 --- a/arch/i386/Kconfig +++ b/arch/i386/Kconfig @@ -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. diff --git a/arch/i386/kernel/reboot_fixups.c b/arch/i386/kernel/reboot_fixups.c index 2d78d918340f608b9ad6d336fc6bc29b0935fa43..03e1cce58f499a3712e2e9957a3ef1781d490f2f 100644 --- a/arch/i386/kernel/reboot_fixups.c +++ b/arch/i386/kernel/reboot_fixups.c @@ -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 }, }; /*