diff options
| author | Alex Williamson <alex.williamson@hp.com> | 2009-12-01 00:51:44 +0300 |
|---|---|---|
| committer | Jesse Barnes <jbarnes@virtuousgeek.org> | 2009-12-05 02:52:43 +0300 |
| commit | 59353ea30e65ab3ae181d6175e3212e1361c3787 (patch) | |
| tree | 4fc54f9c8e3b4dd5af6d7f125739ccac9f9d6410 /drivers/pci | |
| parent | 04b55c4732780381410e52db0e9bfb7661f2b4b3 (diff) | |
| download | linux-59353ea30e65ab3ae181d6175e3212e1361c3787.tar.xz | |
PCI: Always set prefetchable base/limit upper32 registers
Prior to 1f82de10 we always initialized the upper 32bits of the
prefetchable memory window, regardless of the address range used.
Now we only touch it for a >32bit address, which means the upper32
registers remain whatever the BIOS initialized them too.
It's valid for the BIOS to set the upper32 base/limit to
0xffffffff/0x00000000, which makes us program prefetchable ranges
like 0xffffffffabc00000 - 0x00000000abc00000
Revert the chunk of 1f82de10 that made this conditional so we always
write the upper32 registers and remove now unused pref_mem64 variable.
Signed-off-by: Alex Williamson <alex.williamson@hp.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Diffstat (limited to 'drivers/pci')
| -rw-r--r-- | drivers/pci/setup-bus.c | 11 |
1 files changed, 3 insertions, 8 deletions
diff --git a/drivers/pci/setup-bus.c b/drivers/pci/setup-bus.c index 502d1704c533..c48cd377b3f5 100644 --- a/drivers/pci/setup-bus.c +++ b/drivers/pci/setup-bus.c @@ -140,7 +140,6 @@ static void pci_setup_bridge(struct pci_bus *bus) struct resource *res; struct pci_bus_region region; u32 l, bu, lu, io_upper16; - int pref_mem64; if (pci_is_enabled(bridge)) return; @@ -194,7 +193,6 @@ static void pci_setup_bridge(struct pci_bus *bus) pci_write_config_dword(bridge, PCI_PREF_LIMIT_UPPER32, 0); /* Set up PREF base/limit. */ - pref_mem64 = 0; bu = lu = 0; res = bus->resource[2]; pcibios_resource_to_bus(bridge, ®ion, res); @@ -202,7 +200,6 @@ static void pci_setup_bridge(struct pci_bus *bus) l = (region.start >> 16) & 0xfff0; l |= region.end & 0xfff00000; if (res->flags & IORESOURCE_MEM_64) { - pref_mem64 = 1; bu = upper_32_bits(region.start); lu = upper_32_bits(region.end); } @@ -214,11 +211,9 @@ static void pci_setup_bridge(struct pci_bus *bus) } pci_write_config_dword(bridge, PCI_PREF_MEMORY_BASE, l); - if (pref_mem64) { - /* Set the upper 32 bits of PREF base & limit. */ - pci_write_config_dword(bridge, PCI_PREF_BASE_UPPER32, bu); - pci_write_config_dword(bridge, PCI_PREF_LIMIT_UPPER32, lu); - } + /* Set the upper 32 bits of PREF base & limit. */ + pci_write_config_dword(bridge, PCI_PREF_BASE_UPPER32, bu); + pci_write_config_dword(bridge, PCI_PREF_LIMIT_UPPER32, lu); pci_write_config_word(bridge, PCI_BRIDGE_CONTROL, bus->bridge_ctl); } |