summaryrefslogtreecommitdiff
path: root/arch/x86_64/kernel/early-quirks.c
diff options
context:
space:
mode:
authorThomas Gleixner <tglx@linutronix.de>2007-10-11 11:14:49 +0200
committerThomas Gleixner <tglx@linutronix.de>2007-10-11 11:14:49 +0200
commit1a333ab079458b8ca58ebb761ebca48b7fc9ab5c (patch)
treec7074948d2e87b3ea661606d7f87b71296a70444 /arch/x86_64/kernel/early-quirks.c
parenta6d83df15c53a5f503c50e3d824c1cf3f89ebb1a (diff)
x86_64: prepare shared kernel/early-quirks.c
Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86_64/kernel/early-quirks.c')
-rw-r--r--arch/x86_64/kernel/early-quirks.c127
1 files changed, 0 insertions, 127 deletions
diff --git a/arch/x86_64/kernel/early-quirks.c b/arch/x86_64/kernel/early-quirks.c
deleted file mode 100644
index 13aa4fd728f3..000000000000
--- a/arch/x86_64/kernel/early-quirks.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;
- }
- }
- }
-}