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authorBenjamin Herrenschmidt <benh@kernel.crashing.org>2006-11-11 17:25:06 +1100
committerPaul Mackerras <paulus@samba.org>2006-12-04 20:38:45 +1100
commit6506e7102fd57b138979f131d751014462181202 (patch)
tree0f9e974c89027955210c6c338a49d0b0fa4519d1 /arch/powerpc/kernel
parente557a1c96c82f4d1a91b5c2e2e0275b5999c297d (diff)
[POWERPC] Resolve the BUID for RTAS PCI config space accesses
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>
Diffstat (limited to 'arch/powerpc/kernel')
-rw-r--r--arch/powerpc/kernel/rtas_pci.c27
1 files changed, 4 insertions, 23 deletions
diff --git a/arch/powerpc/kernel/rtas_pci.c b/arch/powerpc/kernel/rtas_pci.c
index b4a0de79c06..2576e12d725 100644
--- a/arch/powerpc/kernel/rtas_pci.c
+++ b/arch/powerpc/kernel/rtas_pci.c
@@ -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;
-
- if (ibm_read_pci_config == -1) return 0;
+ struct resource r;
- /* 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)
- return 0;
-
- buid_vals = get_property(phb, "reg", &len);
- if (buid_vals == NULL)
+ if (of_address_to_resource(phb, 0, &r))
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,