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authorMichael Ellerman <michael@ellerman.id.au>2006-08-16 14:04:14 +0200
committerPaul Mackerras <paulus@samba.org>2006-08-25 05:27:35 +0200
commit6f3d5d3cc4b1447578ae8484166bbc34a64150c5 (patch)
tree3641fb3b82081252fcb67cb8d2c66eb4d877e25c /arch/powerpc/kernel/rtas_pci.c
parent[POWERPC] iseries: remove const warning (diff)
downloadlinux-6f3d5d3cc4b1447578ae8484166bbc34a64150c5.tar.xz
linux-6f3d5d3cc4b1447578ae8484166bbc34a64150c5.zip
[POWERPC] Add a helper for calculating RTAS "config_addr" parameters
Several RTAS calls take a "config_addr" parameter, which is a particular way of specifying a PCI busno, devfn and register number into a 32-bit word. Currently these are open-coded, and I'll be adding another soon, replace them with a helper that encapsulates the logic. Be more strict about masking the busno too, just in case. Booted on P5 LPAR. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch/powerpc/kernel/rtas_pci.c')
-rw-r--r--arch/powerpc/kernel/rtas_pci.c6
1 files changed, 2 insertions, 4 deletions
diff --git a/arch/powerpc/kernel/rtas_pci.c b/arch/powerpc/kernel/rtas_pci.c
index 5a798ac6aecf..b4a0de79c060 100644
--- a/arch/powerpc/kernel/rtas_pci.c
+++ b/arch/powerpc/kernel/rtas_pci.c
@@ -81,8 +81,7 @@ int rtas_read_config(struct pci_dn *pdn, int where, int size, u32 *val)
if (!config_access_valid(pdn, where))
return PCIBIOS_BAD_REGISTER_NUMBER;
- addr = ((where & 0xf00) << 20) | (pdn->busno << 16) |
- (pdn->devfn << 8) | (where & 0xff);
+ addr = rtas_config_addr(pdn->busno, pdn->devfn, where);
buid = pdn->phb->buid;
if (buid) {
ret = rtas_call(ibm_read_pci_config, 4, 2, &returnval,
@@ -134,8 +133,7 @@ int rtas_write_config(struct pci_dn *pdn, int where, int size, u32 val)
if (!config_access_valid(pdn, where))
return PCIBIOS_BAD_REGISTER_NUMBER;
- addr = ((where & 0xf00) << 20) | (pdn->busno << 16) |
- (pdn->devfn << 8) | (where & 0xff);
+ addr = rtas_config_addr(pdn->busno, pdn->devfn, where);
buid = pdn->phb->buid;
if (buid) {
ret = rtas_call(ibm_write_pci_config, 5, 1, NULL, addr,