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[POWERPC] Resolve the BUID for RTAS PCI config space accesses

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The BUID is the first entry of a PCI host bridge "reg" property.

Now that PCI busses can be anywhere in the device-tree, we need to
fully translate the value there to a CPU physical address before
we can use it with RTAS.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Benjamin Herrenschmidt 2006-11-11 17:25:06 +11:00 committed by Paul Mackerras
parent e557a1c96c
commit 6506e7102f
1 changed files with 4 additions and 23 deletions
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27
arch/powerpc/kernel/rtas_pci.c
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@ -231,32 +231,13 @@ void __init init_pci_config_tokens (void)
unsigned long __devinit get_phb_buid (struct device_node *phb)
{
int addr_cells;
const unsigned int *buid_vals;
unsigned int len;
unsigned long buid;
struct resource r;
if (ibm_read_pci_config == -1) return 0;
/* PHB's will always be children of the root node,
* or so it is promised by the current firmware. */
if (phb->parent == NULL)
if (ibm_read_pci_config == -1)
return 0;
if (phb->parent->parent)
if (of_address_to_resource(phb, 0, &r))
return 0;
buid_vals = get_property(phb, "reg", &len);
if (buid_vals == NULL)
return 0;
addr_cells = prom_n_addr_cells(phb);
if (addr_cells == 1) {
buid = (unsigned long) buid_vals[0];
} else {
buid = (((unsigned long)buid_vals[0]) << 32UL) |
(((unsigned long)buid_vals[1]) & 0xffffffff);
}
return buid;
return r.start;
}
static int phb_set_bus_ranges(struct device_node *dev,