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authorPaul Mundt <lethal@linux-sh.org>2007-12-10 15:50:28 +0900
committerPaul Mundt <lethal@linux-sh.org>2008-01-28 13:18:59 +0900
commitcd01204b82933754a7276838656420477f64d4b8 (patch)
treef9e3b11574bec04cda78c549cdc5c37c3c75c4a5 /include/asm-sh
parentc8c0a1aba9fa8f816dc8fb477ff816a5b700f0ea (diff)
downloadop-kernel-dev-cd01204b82933754a7276838656420477f64d4b8.zip
op-kernel-dev-cd01204b82933754a7276838656420477f64d4b8.tar.gz
sh: Encode L1/L2 cache shape in auxvt.
This adds in the L1I/L1D/L2 cache shape support to their respective entries in the ELF auxvt, based on the Alpha implementation. We use this on the userspace libc side for calculating a tightly packed SHMLBA amongst other things. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'include/asm-sh')
-rw-r--r--include/asm-sh/auxvec.h12
-rw-r--r--include/asm-sh/elf.h19
-rw-r--r--include/asm-sh/system.h2
3 files changed, 29 insertions, 4 deletions
diff --git a/include/asm-sh/auxvec.h b/include/asm-sh/auxvec.h
index 1b6916e..4069858 100644
--- a/include/asm-sh/auxvec.h
+++ b/include/asm-sh/auxvec.h
@@ -15,4 +15,16 @@
#define AT_SYSINFO_EHDR 33
#endif
+/*
+ * More complete cache descriptions than AT_[DIU]CACHEBSIZE. If the
+ * value is -1, then the cache doesn't exist. Otherwise:
+ *
+ * bit 0-3: Cache set-associativity; 0 means fully associative.
+ * bit 4-7: Log2 of cacheline size.
+ * bit 8-31: Size of the entire cache >> 8.
+ */
+#define AT_L1I_CACHESHAPE 34
+#define AT_L1D_CACHESHAPE 35
+#define AT_L2_CACHESHAPE 36
+
#endif /* __ASM_SH_AUXVEC_H */
diff --git a/include/asm-sh/elf.h b/include/asm-sh/elf.h
index 5a1e920..6196040 100644
--- a/include/asm-sh/elf.h
+++ b/include/asm-sh/elf.h
@@ -161,12 +161,25 @@ extern void __kernel_vsyscall;
#define VDSO_BASE ((unsigned long)current->mm->context.vdso)
#define VDSO_SYM(x) (VDSO_BASE + (unsigned long)(x))
+#define VSYSCALL_AUX_ENT \
+ if (vdso_enabled) \
+ NEW_AUX_ENT(AT_SYSINFO_EHDR, VDSO_BASE);
+#else
+#define VSYSCALL_AUX_ENT
+#endif /* CONFIG_VSYSCALL */
+
+extern int l1i_cache_shape, l1d_cache_shape, l2_cache_shape;
+
/* update AT_VECTOR_SIZE_ARCH if the number of NEW_AUX_ENT entries changes */
#define ARCH_DLINFO \
do { \
- if (vdso_enabled) \
- NEW_AUX_ENT(AT_SYSINFO_EHDR, VDSO_BASE); \
+ /* Optional vsyscall entry */ \
+ VSYSCALL_AUX_ENT \
+ \
+ /* Cache desc */ \
+ NEW_AUX_ENT(AT_L1I_CACHESHAPE, l1i_cache_shape); \
+ NEW_AUX_ENT(AT_L1D_CACHESHAPE, l1d_cache_shape); \
+ NEW_AUX_ENT(AT_L2_CACHESHAPE, l2_cache_shape); \
} while (0)
-#endif /* CONFIG_VSYSCALL */
#endif /* __ASM_SH_ELF_H */
diff --git a/include/asm-sh/system.h b/include/asm-sh/system.h
index 9bda8d0..8459255 100644
--- a/include/asm-sh/system.h
+++ b/include/asm-sh/system.h
@@ -12,7 +12,7 @@
#include <asm/types.h>
#include <asm/ptrace.h>
-#define AT_VECTOR_SIZE_ARCH 1 /* entries in ARCH_DLINFO */
+#define AT_VECTOR_SIZE_ARCH 4 /* entries in ARCH_DLINFO */
#if defined(CONFIG_CPU_SH4A) || defined(CONFIG_CPU_SH5)
#define __icbi() \
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