path: root/include/asm-arm
diff options
authorLennert Buytenhek <buytenh@wantstofly.org>2006-06-02 19:51:50 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2006-06-02 19:51:50 +0100
commita77bc69138a4f52d003ca81d075f386953f6b25a (patch)
tree01ea99eb0eaceff5c8771e9a88d4f5fdb9607ef8 /include/asm-arm
parentba8f5baba79da8eb502f8534c3a8ecb64aceb790 (diff)
[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/asm-arm')
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 6e19f46d54d..c85fc06a043 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;