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Kevin Hester <kevinh@ispiri.com>, performace fix

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This commit is contained in:
Andrew Ip 2003-01-08 06:58:34 +00:00
commit e431e353cd
3 changed files with 47 additions and 4 deletions
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5
src/mainboard/via/epia/mainboard.c
View file

@ -54,8 +54,8 @@ mainboard_fixup()
{
printk_info("Mainboard fixup\n");
northbridge_fixup();
southbridge_fixup();
pci_routing_fixup();
}
void
@ -65,14 +65,13 @@ final_southbridge_fixup()
nvram_on();
keyboard_on();
southbridge_fixup();
pci_routing_fixup();
}
void
final_mainboard_fixup()
{
final_southbridge_fixup();
printk_info("Final mainboard fixup\n");
final_southbridge_fixup();
}

24
src/northbridge/via/vt694/northbridge.c
View file

@ -67,7 +67,7 @@ struct mem_range *sizeram(void)
mem[1].sizek = 64*1024;
}
mem[1].sizek -= mem[1].basek;
return &mem;
return mem;
}
#ifdef HAVE_FRAMEBUFFER
@ -82,3 +82,25 @@ void framebuffer_on()
pcibios_write_config_word(0, devfn, 0x3e, command);
}
#endif
/*
* This fixup is based on capturing values from an Award bios. Without
* this fixup the DMA write performance is awful (i.e. hdparm -t /dev/hda is 20x
* slower than normal, ethernet drops packets).
* Apparently these registers govern some sort of bus master behavior.
*/
void northbridge_fixup(void)
{
struct pci_dev *pcidev = pci_find_slot(0, PCI_DEVFN(0,0));
if (pcidev) {
pci_write_config_byte(pcidev, 0x70, 0xc0);
pci_write_config_byte(pcidev, 0x71, 0x88);
pci_write_config_byte(pcidev, 0x72, 0xec);
pci_write_config_byte(pcidev, 0x73, 0x0c);
pci_write_config_byte(pcidev, 0x74, 0x0e);
pci_write_config_byte(pcidev, 0x75, 0x81);
pci_write_config_byte(pcidev, 0x76, 0x52);
}
}

22
src/northbridge/via/vt8601/northbridge.c
View file

@ -82,3 +82,25 @@ void framebuffer_on()
pcibios_write_config_word(0, devfn, 0x3e, command);
}
#endif
/*
* This fixup is based on capturing values from an Award bios. Without
* this fixup the DMA write performance is awful (i.e. hdparm -t /dev/hda is 20x
* slower than normal, ethernet drops packets).
* Apparently these registers govern some sort of bus master behavior.
*/
void northbridge_fixup(void)
{
struct pci_dev *pcidev = pci_find_slot(0, PCI_DEVFN(0,0));
if (pcidev) {
pci_write_config_byte(pcidev, 0x70, 0xc0);
pci_write_config_byte(pcidev, 0x71, 0x88);
pci_write_config_byte(pcidev, 0x72, 0xec);
pci_write_config_byte(pcidev, 0x73, 0x0c);
pci_write_config_byte(pcidev, 0x74, 0x0e);
pci_write_config_byte(pcidev, 0x75, 0x81);
pci_write_config_byte(pcidev, 0x76, 0x52);
}
}