sh: perf events: Document SH-4A raw event codes.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
diff --git a/arch/sh/kernel/cpu/sh4a/perf_event.c b/arch/sh/kernel/cpu/sh4a/perf_event.c
index d093834..eddc219 100644
--- a/arch/sh/kernel/cpu/sh4a/perf_event.c
+++ b/arch/sh/kernel/cpu/sh4a/perf_event.c
@@ -38,6 +38,44 @@
static struct sh_pmu sh4a_pmu;
/*
+ * Supported raw event codes:
+ *
+ * Event Code Description
+ * ---------- -----------
+ *
+ * 0x0000 number of elapsed cycles
+ * 0x0200 number of elapsed cycles in privileged mode
+ * 0x0280 number of elapsed cycles while SR.BL is asserted
+ * 0x0202 instruction execution
+ * 0x0203 instruction execution in parallel
+ * 0x0204 number of unconditional branches
+ * 0x0208 number of exceptions
+ * 0x0209 number of interrupts
+ * 0x0220 UTLB miss caused by instruction fetch
+ * 0x0222 UTLB miss caused by operand access
+ * 0x02a0 number of ITLB misses
+ * 0x0028 number of accesses to instruction memories
+ * 0x0029 number of accesses to instruction cache
+ * 0x002a instruction cache miss
+ * 0x022e number of access to instruction X/Y memory
+ * 0x0030 number of reads to operand memories
+ * 0x0038 number of writes to operand memories
+ * 0x0031 number of operand cache read accesses
+ * 0x0039 number of operand cache write accesses
+ * 0x0032 operand cache read miss
+ * 0x003a operand cache write miss
+ * 0x0236 number of reads to operand X/Y memory
+ * 0x023e number of writes to operand X/Y memory
+ * 0x0237 number of reads to operand U memory
+ * 0x023f number of writes to operand U memory
+ * 0x0337 number of U memory read buffer misses
+ * 0x02b4 number of wait cycles due to operand read access
+ * 0x02bc number of wait cycles due to operand write access
+ * 0x0033 number of wait cycles due to operand cache read miss
+ * 0x003b number of wait cycles due to operand cache write miss
+ */
+
+/*
* Special reserved bits used by hardware emulators, read values will
* vary, but writes must always be 0.
*/
