diff options
Diffstat (limited to 'arch/x86_64/kernel/early-quirks_64.c')
-rw-r--r-- | arch/x86_64/kernel/early-quirks_64.c | 127 |
1 files changed, 0 insertions, 127 deletions
diff --git a/arch/x86_64/kernel/early-quirks_64.c b/arch/x86_64/kernel/early-quirks_64.c deleted file mode 100644 index 13aa4fd728f..00000000000 --- a/arch/x86_64/kernel/early-quirks_64.c +++ /dev/null @@ -1,127 +0,0 @@ -/* Various workarounds for chipset bugs. - This code runs very early and can't use the regular PCI subsystem - The entries are keyed to PCI bridges which usually identify chipsets - uniquely. - This is only for whole classes of chipsets with specific problems which - need early invasive action (e.g. before the timers are initialized). - Most PCI device specific workarounds can be done later and should be - in standard PCI quirks - Mainboard specific bugs should be handled by DMI entries. - CPU specific bugs in setup.c */ - -#include <linux/pci.h> -#include <linux/acpi.h> -#include <linux/pci_ids.h> -#include <asm/pci-direct.h> -#include <asm/proto.h> -#include <asm/iommu.h> -#include <asm/dma.h> - -static void __init via_bugs(void) -{ -#ifdef CONFIG_IOMMU - if ((end_pfn > MAX_DMA32_PFN || force_iommu) && - !iommu_aperture_allowed) { - printk(KERN_INFO - "Looks like a VIA chipset. Disabling IOMMU. Override with iommu=allowed\n"); - iommu_aperture_disabled = 1; - } -#endif -} - -#ifdef CONFIG_ACPI - -static int __init nvidia_hpet_check(struct acpi_table_header *header) -{ - return 0; -} -#endif - -static void __init nvidia_bugs(void) -{ -#ifdef CONFIG_ACPI - /* - * All timer overrides on Nvidia are - * wrong unless HPET is enabled. - * Unfortunately that's not true on many Asus boards. - * We don't know yet how to detect this automatically, but - * at least allow a command line override. - */ - if (acpi_use_timer_override) - return; - - if (acpi_table_parse(ACPI_SIG_HPET, nvidia_hpet_check)) { - acpi_skip_timer_override = 1; - printk(KERN_INFO "Nvidia board " - "detected. Ignoring ACPI " - "timer override.\n"); - printk(KERN_INFO "If you got timer trouble " - "try acpi_use_timer_override\n"); - } -#endif - /* RED-PEN skip them on mptables too? */ - -} - -static void __init ati_bugs(void) -{ - if (timer_over_8254 == 1) { - timer_over_8254 = 0; - printk(KERN_INFO - "ATI board detected. Disabling timer routing over 8254.\n"); - } -} - -struct chipset { - u16 vendor; - void (*f)(void); -}; - -static struct chipset early_qrk[] __initdata = { - { PCI_VENDOR_ID_NVIDIA, nvidia_bugs }, - { PCI_VENDOR_ID_VIA, via_bugs }, - { PCI_VENDOR_ID_ATI, ati_bugs }, - {} -}; - -void __init early_quirks(void) -{ - int num, slot, func; - - if (!early_pci_allowed()) - return; - - /* Poor man's PCI discovery */ - for (num = 0; num < 32; num++) { - for (slot = 0; slot < 32; slot++) { - for (func = 0; func < 8; func++) { - u32 class; - u32 vendor; - u8 type; - int i; - class = read_pci_config(num,slot,func, - PCI_CLASS_REVISION); - if (class == 0xffffffff) - break; - - if ((class >> 16) != PCI_CLASS_BRIDGE_PCI) - continue; - - vendor = read_pci_config(num, slot, func, - PCI_VENDOR_ID); - vendor &= 0xffff; - - for (i = 0; early_qrk[i].f; i++) - if (early_qrk[i].vendor == vendor) { - early_qrk[i].f(); - return; - } - - type = read_pci_config_byte(num, slot, func, - PCI_HEADER_TYPE); - if (!(type & 0x80)) - break; - } - } - } -} |