From dfa4698c50bf85b7927214b0e4a3dc4bc3b3c4a9 Mon Sep 17 00:00:00 2001 From: Andi Kleen Date: Tue, 26 Sep 2006 10:52:30 +0200 Subject: [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 Also remove outdated ATI quirk that was obsolete, Signed-off-by: Andi Kleen --- arch/x86_64/kernel/Makefile | 2 +- arch/x86_64/kernel/early-quirks.c | 118 ++++++++++++++++++++++++++++++++++++++ arch/x86_64/kernel/io_apic.c | 101 -------------------------------- arch/x86_64/kernel/setup.c | 2 +- 4 files changed, 120 insertions(+), 103 deletions(-) create mode 100644 arch/x86_64/kernel/early-quirks.c (limited to 'arch') diff --git a/arch/x86_64/kernel/Makefile b/arch/x86_64/kernel/Makefile index 0ef39553c0f6..000e67e8f028 100644 --- a/arch/x86_64/kernel/Makefile +++ b/arch/x86_64/kernel/Makefile @@ -8,7 +8,7 @@ obj-y := process.o signal.o entry.o traps.o irq.o \ ptrace.o time.o ioport.o ldt.o setup.o i8259.o sys_x86_64.o \ x8664_ksyms.o i387.o syscall.o vsyscall.o \ setup64.o bootflag.o e820.o reboot.o quirks.o i8237.o \ - pci-dma.o pci-nommu.o alternative.o + pci-dma.o pci-nommu.o alternative.o early-quirks.o obj-$(CONFIG_STACKTRACE) += stacktrace.o obj-$(CONFIG_X86_MCE) += mce.o diff --git a/arch/x86_64/kernel/early-quirks.c b/arch/x86_64/kernel/early-quirks.c new file mode 100644 index 000000000000..d637cff1c4b1 --- /dev/null +++ b/arch/x86_64/kernel/early-quirks.c @@ -0,0 +1,118 @@ +/* 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 +#include +#include +#include +#include +#include + +static void 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 nvidia_hpet_detected __initdata; + +static int __init nvidia_hpet_check(unsigned long phys, unsigned long size) +{ + nvidia_hpet_detected = 1; + return 0; +} +#endif + +static void nvidia_bugs(void) +{ +#ifdef CONFIG_ACPI + /* + * All timer overrides on Nvidia are + * wrong unless HPET is enabled. + */ + nvidia_hpet_detected = 0; + acpi_table_parse(ACPI_HPET, nvidia_hpet_check); + if (nvidia_hpet_detected == 0) { + acpi_skip_timer_override = 1; + printk(KERN_INFO "Nvidia board " + "detected. Ignoring ACPI " + "timer override.\n"); + } +#endif + /* RED-PEN skip them on mptables too? */ + +} + +static void ati_bugs(void) +{ +#if 1 /* for testing */ + printk("ATI board detected\n"); +#endif + /* No bugs right now */ +} + +struct chipset { + u16 vendor; + void (*f)(void); +}; + +static struct chipset early_qrk[] = { + { 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; + /* 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; + } + } + } +} diff --git a/arch/x86_64/kernel/io_apic.c b/arch/x86_64/kernel/io_apic.c index a02ed17d05dc..8bbff64c20d7 100644 --- a/arch/x86_64/kernel/io_apic.c +++ b/arch/x86_64/kernel/io_apic.c @@ -280,107 +280,6 @@ static int __init setup_enable_8254_timer(char *s) __setup("disable_8254_timer", setup_disable_8254_timer); __setup("enable_8254_timer", setup_enable_8254_timer); -#include -#include -#include - - -#ifdef CONFIG_ACPI - -static int nvidia_hpet_detected __initdata; - -static int __init nvidia_hpet_check(unsigned long phys, unsigned long size) -{ - nvidia_hpet_detected = 1; - return 0; -} -#endif - -/* Temporary Hack. Nvidia and VIA boards currently only work with IO-APIC - off. Check for an Nvidia or VIA PCI bridge and turn it off. - Use pci direct infrastructure because this runs before the PCI subsystem. - - Can be overwritten with "apic" - - And another hack to disable the IOMMU on VIA chipsets. - - ... and others. Really should move this somewhere else. - - Kludge-O-Rama. */ -void __init check_ioapic(void) -{ - int num,slot,func; - /* 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; - 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; - switch (vendor) { - case PCI_VENDOR_ID_VIA: -#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 - return; - case PCI_VENDOR_ID_NVIDIA: -#ifdef CONFIG_ACPI - /* - * All timer overrides on Nvidia are - * wrong unless HPET is enabled. - */ - nvidia_hpet_detected = 0; - acpi_table_parse(ACPI_HPET, - nvidia_hpet_check); - if (nvidia_hpet_detected == 0) { - acpi_skip_timer_override = 1; - printk(KERN_INFO "Nvidia board " - "detected. Ignoring ACPI " - "timer override.\n"); - } -#endif - /* RED-PEN skip them on mptables too? */ - return; - - /* This should be actually default, but - for 2.6.16 let's do it for ATI only where - it's really needed. */ - case PCI_VENDOR_ID_ATI: - if (timer_over_8254 == 1) { - timer_over_8254 = 0; - printk(KERN_INFO - "ATI board detected. Disabling timer routing over 8254.\n"); - } - return; - } - - - /* No multi-function device? */ - type = read_pci_config_byte(num,slot,func, - PCI_HEADER_TYPE); - if (!(type & 0x80)) - break; - } - } - } -} /* * Find the IRQ entry number of a certain pin. diff --git a/arch/x86_64/kernel/setup.c b/arch/x86_64/kernel/setup.c index fbe9f7faa2db..aab4bd66aa0d 100644 --- a/arch/x86_64/kernel/setup.c +++ b/arch/x86_64/kernel/setup.c @@ -653,7 +653,7 @@ void __init setup_arch(char **cmdline_p) paging_init(); - check_ioapic(); + early_quirks(); /* * set this early, so we dont allocate cpu0 -- cgit v1.2.3