From 6506e7102fd57b138979f131d751014462181202 Mon Sep 17 00:00:00 2001 From: Benjamin Herrenschmidt Date: Sat, 11 Nov 2006 17:25:06 +1100 Subject: [PATCH] [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 Signed-off-by: Paul Mackerras --- arch/powerpc/kernel/rtas_pci.c | 27 ++++----------------------- 1 file changed, 4 insertions(+), 23 deletions(-) diff --git a/arch/powerpc/kernel/rtas_pci.c b/arch/powerpc/kernel/rtas_pci.c index b4a0de79c060..2576e12d7255 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, -- 2.20.1