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| author | Lennert Buytenhek <buytenh@wantstofly.org> | 2006-06-02 19:51:50 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2006-06-02 19:51:50 +0100 |
| commit | a77bc69138a4f52d003ca81d075f386953f6b25a (patch) | |
| tree | 01ea99eb0eaceff5c8771e9a88d4f5fdb9607ef8 /include | |
| parent | ba8f5baba79da8eb502f8534c3a8ecb64aceb790 (diff) | |
| download | linux-a77bc69138a4f52d003ca81d075f386953f6b25a.tar.gz linux-a77bc69138a4f52d003ca81d075f386953f6b25a.tar.bz2 linux-a77bc69138a4f52d003ca81d075f386953f6b25a.zip | |
[ARM] 3539/1: ixp23xx: fix __arch_ixp23xx_is_coherent() for A1 stepping
Patch from Lennert Buytenhek
The current __ixp23xx_arch_is_coherent() check assumes that the
lower byte of IXP23XX_PRODUCT_ID is identical to the lower byte of
processor_id, but this is not the case, and because of this we were
incorrectly enabling coherency on A1 stepping CPUs.
Stepping A1 of the ixp2350, which has a PRODUCT_ID of 0x401, has '02'
in the lower byte of processor_id, while A2, with a PRODUCT_ID of
0x402, has '04' in the lower byte of processor_id.
So, to check for >= A2, we really need to check the lower byte of
processor_id against >= 4.
Signed-off-by: Lennert Buytenhek <buytenh@wantstofly.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'include')
| -rw-r--r-- | include/asm-arm/arch-ixp23xx/memory.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/include/asm-arm/arch-ixp23xx/memory.h b/include/asm-arm/arch-ixp23xx/memory.h index 6e19f46d54d1..c85fc06a043c 100644 --- a/include/asm-arm/arch-ixp23xx/memory.h +++ b/include/asm-arm/arch-ixp23xx/memory.h @@ -49,7 +49,7 @@ static inline int __ixp23xx_arch_is_coherent(void) { extern unsigned int processor_id; - if (((processor_id & 15) >= 2) || machine_is_roadrunner()) + if (((processor_id & 15) >= 4) || machine_is_roadrunner()) return 1; return 0; |