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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
commit2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch)
tree848558de17fb3008cdf4d861b01ac7781903ce39 /arch/alpha/include/asm/timex.h
parentInitial commit. (diff)
downloadlinux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz
linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip
Adding upstream version 6.1.76.upstream/6.1.76
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/alpha/include/asm/timex.h')
-rw-r--r--arch/alpha/include/asm/timex.h33
1 files changed, 33 insertions, 0 deletions
diff --git a/arch/alpha/include/asm/timex.h b/arch/alpha/include/asm/timex.h
new file mode 100644
index 000000000..f89798da8
--- /dev/null
+++ b/arch/alpha/include/asm/timex.h
@@ -0,0 +1,33 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * 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;
+}
+#define get_cycles get_cycles
+
+#endif