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authorRussell King <rmk@dyn-67.arm.linux.org.uk>2008-11-09 11:18:36 +0000
committerRussell King <rmk+kernel@arm.linux.org.uk>2008-11-09 11:18:36 +0000
commitebb4c65869db7213280ad9c510637683939b5ff8 (patch)
treee9aa372c806fad73a04ba2f9d16d1f17491a11cf /arch/arm/mm/mmu.c
parent7bfc0b2e266dd4cd3d3f27a3ad31bf79974190b1 (diff)
downloadblackbird-op-linux-ebb4c65869db7213280ad9c510637683939b5ff8.tar.gz
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[ARM] iop: iop3xx needs registers mapped uncached+unbuffered
Mikael Pettersson reported: The 2.6.28-rc kernels fail to detect PCI device 0000:00:01.0 (the first ethernet port) on my Thecus n2100 XScale box. There is however still a strange "ghost" device that gets partially detected in 2.6.28-rc2 vanilla. The IOP321 manual says: The user designates the memory region containing the OCCDR as non-cacheable and non-bufferable from the IntelR XScaleTM core. This guarantees that all load/stores to the OCCDR are only of DWORD quantities. Ensure that the OCCDR is so mapped. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/mm/mmu.c')
-rw-r--r--arch/arm/mm/mmu.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/arm/mm/mmu.c b/arch/arm/mm/mmu.c
index e63db11f16a8..7f36c825718d 100644
--- a/arch/arm/mm/mmu.c
+++ b/arch/arm/mm/mmu.c
@@ -208,6 +208,12 @@ static struct mem_type mem_types[] = {
.prot_sect = PROT_SECT_DEVICE,
.domain = DOMAIN_IO,
},
+ [MT_UNCACHED] = {
+ .prot_pte = PROT_PTE_DEVICE,
+ .prot_l1 = PMD_TYPE_TABLE,
+ .prot_sect = PMD_TYPE_SECT | PMD_SECT_XN,
+ .domain = DOMAIN_IO,
+ },
[MT_CACHECLEAN] = {
.prot_sect = PMD_TYPE_SECT | PMD_SECT_XN,
.domain = DOMAIN_KERNEL,
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