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authorRichard Curnow <richard.curnow@st.com>2006-09-27 14:09:26 +0900
committerPaul Mundt <lethal@linux-sh.org>2006-09-27 14:09:26 +0900
commitb638d0b921dc95229af0dfd09cd24850336a2f75 (patch)
tree0ef34527a47b22421fb92ba2141052fecfe36482 /include/asm-sh/cache.h
parentfdfc74f9fcebdda14609159d5010b758a9409acf (diff)
downloadop-kernel-dev-b638d0b921dc95229af0dfd09cd24850336a2f75.zip
op-kernel-dev-b638d0b921dc95229af0dfd09cd24850336a2f75.tar.gz
sh: Optimized cache handling for SH-4/SH-4A caches.
This reworks some of the SH-4 cache handling code to more easily accomodate newer-style caches (particularly for the > direct-mapped case), as well as optimizing some of the old code. Signed-off-by: Richard Curnow <richard.curnow@st.com> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'include/asm-sh/cache.h')
-rw-r--r--include/asm-sh/cache.h22
1 files changed, 18 insertions, 4 deletions
diff --git a/include/asm-sh/cache.h b/include/asm-sh/cache.h
index 656fdfe..33f1336 100644
--- a/include/asm-sh/cache.h
+++ b/include/asm-sh/cache.h
@@ -23,15 +23,29 @@
#define L1_CACHE_ALIGN(x) (((x)+(L1_CACHE_BYTES-1))&~(L1_CACHE_BYTES-1))
struct cache_info {
- unsigned int ways;
- unsigned int sets;
- unsigned int linesz;
+ unsigned int ways; /* Number of cache ways */
+ unsigned int sets; /* Number of cache sets */
+ unsigned int linesz; /* Cache line size (bytes) */
- unsigned int way_incr;
+ unsigned int way_size; /* sets * line size */
+ /*
+ * way_incr is the address offset for accessing the next way
+ * in memory mapped cache array ops.
+ */
+ unsigned int way_incr;
unsigned int entry_shift;
unsigned int entry_mask;
+ /*
+ * Compute a mask which selects the address bits which overlap between
+ * 1. those used to select the cache set during indexing
+ * 2. those in the physical page number.
+ */
+ unsigned int alias_mask;
+
+ unsigned int n_aliases; /* Number of aliases */
+
unsigned long flags;
};
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