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| author | Russell King <rmk@dyn-67.arm.linux.org.uk> | 2008-11-09 11:18:36 +0000 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2008-11-09 11:18:36 +0000 |
| commit | ebb4c65869db7213280ad9c510637683939b5ff8 (patch) | |
| tree | e9aa372c806fad73a04ba2f9d16d1f17491a11cf /arch/arm/mm | |
| parent | 7bfc0b2e266dd4cd3d3f27a3ad31bf79974190b1 (diff) | |
| download | linux-ebb4c65869db7213280ad9c510637683939b5ff8.tar.bz2 | |
[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')
| -rw-r--r-- | arch/arm/mm/mmu.c | 6 |
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, |