FEX-Emu/linux
1
0
Fork 0
mirror of https://github.com/FEX-Emu/linux.git synced 2024-12-14 21:01:29 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

powerpc: Fix boot hang regression on MPC8544DS

Browse Source 
Commit 00c5372d37 caused the MPC8544DS
board to hang at boot.  The MPC8544DS is unique in that it doesn't use
the PCI slots on the ULI (unlike the MPC8572DS or MPC8610HPCD).  So
the dummy read at the end of the address space causes us to hang.

We can detect the situation by comparing the bridge's BARs versus
the root complex.

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
This commit is contained in:
Kumar Gala 2008-10-02 00:58:49 -05:00
parent 4a77035828
commit 1fce2d01df
1 changed files with 11 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
arch/powerpc/platforms/fsl_uli1575.c
View File

@ -219,11 +219,21 @@ static void __devinit quirk_final_uli5249(struct pci_dev *dev)
int i;
u8 *dummy;
struct pci_bus *bus = dev->bus;
resource_size_t end = 0;
for (i = PCI_BRIDGE_RESOURCES; i < PCI_BRIDGE_RESOURCES+3; i++) {
unsigned long flags = pci_resource_flags(dev, i);
if ((flags & (IORESOURCE_MEM|IORESOURCE_PREFETCH)) == IORESOURCE_MEM)
end = pci_resource_end(dev, i);
}
for (i = 0; i < PCI_BUS_NUM_RESOURCES; i++) {
if ((bus->resource[i]) &&
(bus->resource[i]->flags & IORESOURCE_MEM)) {
dummy = ioremap(bus->resource[i]->end - 3, 0x4);
if (bus->resource[i]->end == end)
dummy = ioremap(bus->resource[i]->start, 0x4);
else
dummy = ioremap(bus->resource[i]->end - 3, 0x4);
if (dummy) {
in_8(dummy);
iounmap(dummy);