forked from Minki/linux
[PATCH] Move early chipset quirks out to new file
They did not really belong into io_apic.c. Move them into a new file and clean it up a bit. Also remove outdated ATI quirk that was obsolete, Signed-off-by: Andi Kleen <ak@suse.de>
This commit is contained in:
Andi Kleen
Andi Kleen
parent
edd9652296
commit
dfa4698c50
@ -8,7 +8,7 @@ obj-y := process.o signal.o entry.o traps.o irq.o \
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ptrace.o time.o ioport.o ldt.o setup.o i8259.o sys_x86_64.o \
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x8664_ksyms.o i387.o syscall.o vsyscall.o \
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setup64.o bootflag.o e820.o reboot.o quirks.o i8237.o \
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pci-dma.o pci-nommu.o alternative.o
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pci-dma.o pci-nommu.o alternative.o early-quirks.o
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obj-$(CONFIG_STACKTRACE) += stacktrace.o
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obj-$(CONFIG_X86_MCE) += mce.o
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118
arch/x86_64/kernel/early-quirks.c
Normal file
118
arch/x86_64/kernel/early-quirks.c
Normal file
@ -0,0 +1,118 @@
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/* Various workarounds for chipset bugs.
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This code runs very early and can't use the regular PCI subsystem
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The entries are keyed to PCI bridges which usually identify chipsets
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uniquely.
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This is only for whole classes of chipsets with specific problems which
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need early invasive action (e.g. before the timers are initialized).
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Most PCI device specific workarounds can be done later and should be
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in standard PCI quirks
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Mainboard specific bugs should be handled by DMI entries.
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CPU specific bugs in setup.c */
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#include <linux/pci.h>
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#include <linux/acpi.h>
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#include <linux/pci_ids.h>
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#include <asm/pci-direct.h>
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#include <asm/proto.h>
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#include <asm/dma.h>
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static void via_bugs(void)
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{
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#ifdef CONFIG_IOMMU
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if ((end_pfn > MAX_DMA32_PFN || force_iommu) &&
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!iommu_aperture_allowed) {
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printk(KERN_INFO
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"Looks like a VIA chipset. Disabling IOMMU. Override with iommu=allowed\n");
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iommu_aperture_disabled = 1;
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}
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#endif
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}
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#ifdef CONFIG_ACPI
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static int nvidia_hpet_detected __initdata;
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static int __init nvidia_hpet_check(unsigned long phys, unsigned long size)
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{
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nvidia_hpet_detected = 1;
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return 0;
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}
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#endif
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static void nvidia_bugs(void)
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{
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#ifdef CONFIG_ACPI
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/*
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* All timer overrides on Nvidia are
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* wrong unless HPET is enabled.
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*/
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nvidia_hpet_detected = 0;
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acpi_table_parse(ACPI_HPET, nvidia_hpet_check);
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if (nvidia_hpet_detected == 0) {
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acpi_skip_timer_override = 1;
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printk(KERN_INFO "Nvidia board "
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"detected. Ignoring ACPI "
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"timer override.\n");
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}
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#endif
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/* RED-PEN skip them on mptables too? */
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}
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static void ati_bugs(void)
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{
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#if 1 /* for testing */
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printk("ATI board detected\n");
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#endif
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/* No bugs right now */
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}
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struct chipset {
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u16 vendor;
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void (*f)(void);
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};
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static struct chipset early_qrk[] = {
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{ PCI_VENDOR_ID_NVIDIA, nvidia_bugs },
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{ PCI_VENDOR_ID_VIA, via_bugs },
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{ PCI_VENDOR_ID_ATI, ati_bugs },
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{}
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};
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void __init early_quirks(void)
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{
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int num, slot, func;
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/* Poor man's PCI discovery */
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for (num = 0; num < 32; num++) {
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for (slot = 0; slot < 32; slot++) {
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for (func = 0; func < 8; func++) {
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u32 class;
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u32 vendor;
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u8 type;
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int i;
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class = read_pci_config(num,slot,func,
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PCI_CLASS_REVISION);
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if (class == 0xffffffff)
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break;
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if ((class >> 16) != PCI_CLASS_BRIDGE_PCI)
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continue;
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vendor = read_pci_config(num, slot, func,
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PCI_VENDOR_ID);
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vendor &= 0xffff;
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for (i = 0; early_qrk[i].f; i++)
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if (early_qrk[i].vendor == vendor) {
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early_qrk[i].f();
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return;
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}
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type = read_pci_config_byte(num, slot, func,
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PCI_HEADER_TYPE);
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if (!(type & 0x80))
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break;
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}
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}
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}
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}
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@ -280,107 +280,6 @@ static int __init setup_enable_8254_timer(char *s)
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__setup("disable_8254_timer", setup_disable_8254_timer);
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__setup("enable_8254_timer", setup_enable_8254_timer);
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#include <asm/pci-direct.h>
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#include <linux/pci_ids.h>
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#include <linux/pci.h>
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#ifdef CONFIG_ACPI
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static int nvidia_hpet_detected __initdata;
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static int __init nvidia_hpet_check(unsigned long phys, unsigned long size)
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{
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nvidia_hpet_detected = 1;
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return 0;
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}
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#endif
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/* Temporary Hack. Nvidia and VIA boards currently only work with IO-APIC
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off. Check for an Nvidia or VIA PCI bridge and turn it off.
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Use pci direct infrastructure because this runs before the PCI subsystem.
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Can be overwritten with "apic"
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And another hack to disable the IOMMU on VIA chipsets.
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... and others. Really should move this somewhere else.
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Kludge-O-Rama. */
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void __init check_ioapic(void)
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{
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int num,slot,func;
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/* Poor man's PCI discovery */
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for (num = 0; num < 32; num++) {
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for (slot = 0; slot < 32; slot++) {
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for (func = 0; func < 8; func++) {
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u32 class;
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u32 vendor;
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u8 type;
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class = read_pci_config(num,slot,func,
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PCI_CLASS_REVISION);
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if (class == 0xffffffff)
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break;
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if ((class >> 16) != PCI_CLASS_BRIDGE_PCI)
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continue;
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vendor = read_pci_config(num, slot, func,
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PCI_VENDOR_ID);
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vendor &= 0xffff;
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switch (vendor) {
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case PCI_VENDOR_ID_VIA:
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#ifdef CONFIG_IOMMU
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if ((end_pfn > MAX_DMA32_PFN ||
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force_iommu) &&
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!iommu_aperture_allowed) {
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printk(KERN_INFO
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"Looks like a VIA chipset. Disabling IOMMU. Override with \"iommu=allowed\"\n");
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iommu_aperture_disabled = 1;
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}
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#endif
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return;
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case PCI_VENDOR_ID_NVIDIA:
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#ifdef CONFIG_ACPI
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/*
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* All timer overrides on Nvidia are
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* wrong unless HPET is enabled.
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*/
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nvidia_hpet_detected = 0;
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acpi_table_parse(ACPI_HPET,
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nvidia_hpet_check);
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if (nvidia_hpet_detected == 0) {
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acpi_skip_timer_override = 1;
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printk(KERN_INFO "Nvidia board "
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"detected. Ignoring ACPI "
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"timer override.\n");
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}
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#endif
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/* RED-PEN skip them on mptables too? */
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return;
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/* This should be actually default, but
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for 2.6.16 let's do it for ATI only where
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it's really needed. */
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case PCI_VENDOR_ID_ATI:
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if (timer_over_8254 == 1) {
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timer_over_8254 = 0;
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printk(KERN_INFO
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"ATI board detected. Disabling timer routing over 8254.\n");
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}
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return;
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}
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/* No multi-function device? */
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type = read_pci_config_byte(num,slot,func,
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PCI_HEADER_TYPE);
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if (!(type & 0x80))
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break;
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}
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}
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}
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}
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/*
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* Find the IRQ entry number of a certain pin.
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@ -653,7 +653,7 @@ void __init setup_arch(char **cmdline_p)
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paging_init();
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check_ioapic();
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early_quirks();
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/*
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* set this early, so we dont allocate cpu0
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@ -92,7 +92,7 @@ extern void syscall32_cpu_init(void);
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extern void setup_node_bootmem(int nodeid, unsigned long start, unsigned long end);
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extern void check_ioapic(void);
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extern void early_quirks(void);
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extern void check_efer(void);
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extern int unhandled_signal(struct task_struct *tsk, int sig);
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