From 440fc172ae333c52c458401fe059afcc6e91eebf Mon Sep 17 00:00:00 2001 From: Paul Mundt Date: Wed, 9 Apr 2008 17:58:22 +0900 Subject: [PATCH] sh: Fix up L2 cache probe. SH7723 is the first hard silicon to implement the L2, and unsurprisingly, does the precise inverse of what the specification alleges. XOR the URAM/L2 size bits to get back in line with the existing parsing logic. Signed-off-by: Paul Mundt --- arch/sh/kernel/cpu/sh4/probe.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/arch/sh/kernel/cpu/sh4/probe.c b/arch/sh/kernel/cpu/sh4/probe.c index 6ea87af7247..ebceb0dadff 100644 --- a/arch/sh/kernel/cpu/sh4/probe.c +++ b/arch/sh/kernel/cpu/sh4/probe.c @@ -220,6 +220,12 @@ int __init detect_cpu_and_cache_system(void) * SH-4A's have an optional PIPT L2. */ if (boot_cpu_data.flags & CPU_HAS_L2_CACHE) { + /* Bug if we can't decode the L2 info */ + BUG_ON(!(cvr & 0xf)); + + /* Silicon and specifications have clearly never met.. */ + cvr ^= 0xf; + /* * Size calculation is much more sensible * than it is for the L1. -- 2.41.1