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authorBenjamin Herrenschmidt <benh@kernel.crashing.org>2008-07-17 15:53:31 +1000
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>2008-07-22 10:39:34 +1000
commit67260ac9a397eb7c9e2980be2865912d3840b042 (patch)
tree1a7e51cd72a8b7835eb93202b69cb2a6d0c84794 /arch/powerpc
parent1856c020402f602b2bd26bcc9b77250304565b7e (diff)
downloadop-kernel-dev-67260ac9a397eb7c9e2980be2865912d3840b042.zip
op-kernel-dev-67260ac9a397eb7c9e2980be2865912d3840b042.tar.gz
powerpc: Fix OF parsing of 64 bits PCI addresses
The OF parsing code for PCI addresses isn't always treating properly the address space indication 0b11 (ie. 0x3) as meaning 64 bits memory space. This means that it fails to parse addresses for PCI BARs that have this encoding set by the firmware, which happens on some SLOF versions and breaks offb palette handling on Powerstation. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Acked-by: Segher Boessenkool <segher@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc')
-rw-r--r--arch/powerpc/kernel/pci-common.c1
-rw-r--r--arch/powerpc/kernel/prom_parse.c44
2 files changed, 25 insertions, 20 deletions
diff --git a/arch/powerpc/kernel/pci-common.c b/arch/powerpc/kernel/pci-common.c
index 063cdd4..224e9a1 100644
--- a/arch/powerpc/kernel/pci-common.c
+++ b/arch/powerpc/kernel/pci-common.c
@@ -598,6 +598,7 @@ void __devinit pci_process_bridge_OF_ranges(struct pci_controller *hose,
res->start = pci_addr;
break;
case 2: /* PCI Memory space */
+ case 3: /* PCI 64 bits Memory space */
printk(KERN_INFO
" MEM 0x%016llx..0x%016llx -> 0x%016llx %s\n",
cpu_addr, cpu_addr + size - 1, pci_addr,
diff --git a/arch/powerpc/kernel/prom_parse.c b/arch/powerpc/kernel/prom_parse.c
index 90eb3a3..bc1fb27 100644
--- a/arch/powerpc/kernel/prom_parse.c
+++ b/arch/powerpc/kernel/prom_parse.c
@@ -128,12 +128,35 @@ static void of_bus_pci_count_cells(struct device_node *np,
*sizec = 2;
}
+static unsigned int of_bus_pci_get_flags(const u32 *addr)
+{
+ unsigned int flags = 0;
+ u32 w = addr[0];
+
+ switch((w >> 24) & 0x03) {
+ case 0x01:
+ flags |= IORESOURCE_IO;
+ break;
+ case 0x02: /* 32 bits */
+ case 0x03: /* 64 bits */
+ flags |= IORESOURCE_MEM;
+ break;
+ }
+ if (w & 0x40000000)
+ flags |= IORESOURCE_PREFETCH;
+ return flags;
+}
+
static u64 of_bus_pci_map(u32 *addr, const u32 *range, int na, int ns, int pna)
{
u64 cp, s, da;
+ unsigned int af, rf;
+
+ af = of_bus_pci_get_flags(addr);
+ rf = of_bus_pci_get_flags(range);
/* Check address type match */
- if ((addr[0] ^ range[0]) & 0x03000000)
+ if ((af ^ rf) & (IORESOURCE_MEM | IORESOURCE_IO))
return OF_BAD_ADDR;
/* Read address values, skipping high cell */
@@ -153,25 +176,6 @@ static int of_bus_pci_translate(u32 *addr, u64 offset, int na)
return of_bus_default_translate(addr + 1, offset, na - 1);
}
-static unsigned int of_bus_pci_get_flags(const u32 *addr)
-{
- unsigned int flags = 0;
- u32 w = addr[0];
-
- switch((w >> 24) & 0x03) {
- case 0x01:
- flags |= IORESOURCE_IO;
- break;
- case 0x02: /* 32 bits */
- case 0x03: /* 64 bits */
- flags |= IORESOURCE_MEM;
- break;
- }
- if (w & 0x40000000)
- flags |= IORESOURCE_PREFETCH;
- return flags;
-}
-
const u32 *of_get_pci_address(struct device_node *dev, int bar_no, u64 *size,
unsigned int *flags)
{
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