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authorLinus Torvalds <torvalds@linux-foundation.org>2008-08-15 09:19:40 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2008-08-15 09:19:40 -0700
commit024b246ed24492d6c2ee14c34d742b137fce1b94 (patch)
tree428444950025503218c96b03c86f749403626dec /arch/alpha/include/asm/timex.h
parent9419fc1c957d600093baaea247fef23cca3b4e93 (diff)
alpha: move include/asm-alpha to arch/alpha/include/asm
Sam Ravnborg did the build-test that the direct header file move works, I'm just committing it. This is a pure move: mkdir arch/alpha/include git mv include/asm-alpha arch/alpha/include/asm with no other changes. Requested-and-tested-by: Sam Ravnborg <sam@ravnborg.org> Cc: Richard Henderson <rth@twiddle.net> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/alpha/include/asm/timex.h')
-rw-r--r--arch/alpha/include/asm/timex.h31
1 files changed, 31 insertions, 0 deletions
diff --git a/arch/alpha/include/asm/timex.h b/arch/alpha/include/asm/timex.h
new file mode 100644
index 00000000000..afa0c45e3e9
--- /dev/null
+++ b/arch/alpha/include/asm/timex.h
@@ -0,0 +1,31 @@
+/*
+ * linux/include/asm-alpha/timex.h
+ *
+ * ALPHA architecture timex specifications
+ */
+#ifndef _ASMALPHA_TIMEX_H
+#define _ASMALPHA_TIMEX_H
+
+/* With only one or two oddballs, we use the RTC as the ticker, selecting
+ the 32.768kHz reference clock, which nicely divides down to our HZ. */
+#define CLOCK_TICK_RATE 32768
+
+/*
+ * Standard way to access the cycle counter.
+ * Currently only used on SMP for scheduling.
+ *
+ * Only the low 32 bits are available as a continuously counting entity.
+ * But this only means we'll force a reschedule every 8 seconds or so,
+ * which isn't an evil thing.
+ */
+
+typedef unsigned int cycles_t;
+
+static inline cycles_t get_cycles (void)
+{
+ cycles_t ret;
+ __asm__ __volatile__ ("rpcc %0" : "=r"(ret));
+ return ret;
+}
+
+#endif