From 24d8d25f1563f25c365cc6895bfc88af0b90ee40 Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Thu, 11 Oct 2007 11:12:34 +0200 Subject: i386: prepare shared kernel/reboot_fixups.c Signed-off-by: Thomas Gleixner Signed-off-by: Ingo Molnar --- arch/i386/kernel/reboot_fixups_32.c | 68 +++++++++++++++++++++++++++++++++++++ 1 file changed, 68 insertions(+) create mode 100644 arch/i386/kernel/reboot_fixups_32.c (limited to 'arch/i386/kernel/reboot_fixups_32.c') diff --git a/arch/i386/kernel/reboot_fixups_32.c b/arch/i386/kernel/reboot_fixups_32.c new file mode 100644 index 000000000000..03e1cce58f49 --- /dev/null +++ b/arch/i386/kernel/reboot_fixups_32.c @@ -0,0 +1,68 @@ +/* + * linux/arch/i386/kernel/reboot_fixups.c + * + * This is a good place to put board specific reboot fixups. + * + * List of supported fixups: + * geode-gx1/cs5530a - Jaya Kumar + * geode-gx/lx/cs5536 - Andres Salomon + * + */ + +#include +#include +#include +#include + +static void cs5530a_warm_reset(struct pci_dev *dev) +{ + /* writing 1 to the reset control register, 0x44 causes the + cs5530a to perform a system warm reset */ + pci_write_config_byte(dev, 0x44, 0x1); + udelay(50); /* shouldn't get here but be safe and spin-a-while */ + 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; + void (*reboot_fixup)(struct pci_dev *); +}; + +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 }, +}; + +/* + * we see if any fixup is available for our current hardware. if there + * is a fixup, we call it and we expect to never return from it. if we + * do return, we keep looking and then eventually fall back to the + * standard mach_reboot on return. + */ +void mach_reboot_fixups(void) +{ + struct device_fixup *cur; + struct pci_dev *dev; + int i; + + for (i=0; i < ARRAY_SIZE(fixups_table); i++) { + cur = &(fixups_table[i]); + dev = pci_get_device(cur->vendor, cur->device, NULL); + if (!dev) + continue; + + cur->reboot_fixup(dev); + } +} + -- cgit v1.2.3-59-g8ed1b