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| author | Paul Mundt <lethal@linux-sh.org> | 2008-04-09 10:58:22 +0200 |
|---|---|---|
| committer | Paul Mundt <lethal@linux-sh.org> | 2008-04-18 18:50:07 +0200 |
| commit | 440fc172ae333c52c458401fe059afcc6e91eebf (patch) | |
| tree | bc25cfb81ec590ff5d8eb8facd84206248f93d2c /arch/sh/kernel | |
| parent | sh: Fix up SH-4A part probe. (diff) | |
| download | linux-440fc172ae333c52c458401fe059afcc6e91eebf.tar.xz linux-440fc172ae333c52c458401fe059afcc6e91eebf.zip | |
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 <lethal@linux-sh.org>
Diffstat (limited to 'arch/sh/kernel')
| -rw-r--r-- | arch/sh/kernel/cpu/sh4/probe.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/sh/kernel/cpu/sh4/probe.c b/arch/sh/kernel/cpu/sh4/probe.c index 6ea87af7247e..ebceb0dadff5 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. |