From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Sat, 16 Apr 2005 15:20:36 -0700 Subject: Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip! --- arch/i386/kernel/acpi/earlyquirk.c | 51 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 51 insertions(+) create mode 100644 arch/i386/kernel/acpi/earlyquirk.c (limited to 'arch/i386/kernel/acpi/earlyquirk.c') diff --git a/arch/i386/kernel/acpi/earlyquirk.c b/arch/i386/kernel/acpi/earlyquirk.c new file mode 100644 index 000000000000..726a5ca4b165 --- /dev/null +++ b/arch/i386/kernel/acpi/earlyquirk.c @@ -0,0 +1,51 @@ +/* + * Do early PCI probing for bug detection when the main PCI subsystem is + * not up yet. + */ +#include +#include +#include +#include +#include + +static int __init check_bridge(int vendor, int device) +{ + /* According to Nvidia all timer overrides are bogus. Just ignore + them all. */ + if (vendor == PCI_VENDOR_ID_NVIDIA) { + acpi_skip_timer_override = 1; + } + return 0; +} + +void __init check_acpi_pci(void) +{ + int num,slot,func; + + /* Assume the machine supports type 1. If not it will + always read ffffffff and should not have any side effect. */ + + /* 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; + 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); + + if (check_bridge(vendor&0xffff, vendor >> 16)) + return; + } + + } + } +} -- cgit v1.2.2