Oh no.
Anybody still insist that 'Athlon bug' patch is not to be
included into mainstream kernel?
If someone doesn't like it, feel free to make it a config
option (enabled by default!) and submit an updated patch.
My original patch against 2.4.9 is at the end.
Tuesday, October 09, 2001, 11:32:24 AM,
"Marco Berizzi" <pupilla@hotmail.com> wrote:
MB> I updated my motherboard from ASUS A7V to ABIT KT7A (VIA Apollo KT133A
MB> chipset). The kernel I had (2.4.10) started crashing on boot usually
MB> right after starting init. I tryed a i686 kernel and noticed it works
MB> OK, so I recompiled my crashy kernel only switching the processor type
MB> and it also worked. Changed it back to Athlon/K7/Duron and it starts
MB> crashing.
MB> I also search the mailing list. My mother board is KT7A series v1.3 with
MB> bios revision 4T (I also try with 3N, same results). K7 at 1333MHz. BIOS
MB> settings are default (except I have disabled all BIOS/video shadow).
MB> After flash I also reset CMOS via hardware jumper.
MB> Is there any solution to this (except compiling kernel for 6x86)?
-- Best regards, VDA mailto:VDA@port.imtp.ilyichevsk.odessa.ua--- pci-pc.c.orig Sun Aug 12 15:54:07 2001 +++ pci-pc.c Tue Sep 18 16:45:21 2001 @@ -948,6 +948,26 @@ d->irq = 9; } +/* Fixes some oopses on Athlon optimized + * fast_copy_page when it uses 'movntq's + * instead of 'movq's on Athlon/Duron optimized kernels. + * Bit 7 at offset 0x55 seems to be responsible: + * > Device 0 Offset 55 - Debug (RW) + * > Bits 7-0: Reserved (do not program). default = 0 + * ABIT KT7A 3R BIOS: 0x89 (oopses) + * ABIT KT7A YH BIOS: 0x00 (works) + */ +static void __init pci_fixup_athlon_bug(struct pci_dev *d) +{ + u8 v; + pci_read_config_byte(d, 0x55, &v); + if(v & 0x80) { + printk(KERN_NOTICE "Stomping on Athlon bug.\n"); + v &= 0x7f; /* clear bit 55.7 */ + pci_write_config_byte(d, 0x55, v); + } +} + struct pci_fixup pcibios_fixups[] = { { PCI_FIXUP_HEADER, PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82451NX, pci_fixup_i450nx }, { PCI_FIXUP_HEADER, PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82454GX, pci_fixup_i450gx }, @@ -961,6 +981,7 @@ /* Our bus code shouldnt need this fixup any more. Delete once verified */ { PCI_FIXUP_HEADER, PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_6010, pci_fixup_compaq }, #endif + { PCI_FIXUP_HEADER, PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8363_0, pci_fixup_athlon_bug }, { PCI_FIXUP_HEADER, PCI_VENDOR_ID_UMC, PCI_DEVICE_ID_UMC_UM8886BF, pci_fixup_umc_ide }, { PCI_FIXUP_HEADER, PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_5513, pci_fixup_ide_trash }, { PCI_FIXUP_HEADER, PCI_ANY_ID, PCI_ANY_ID, pci_fixup_ide_bases },
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This archive was generated by hypermail 2b29 : Mon Oct 15 2001 - 21:00:23 EST