1 files changed, 56 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/timex.h b/arch/powerpc/include/asm/timex.h
new file mode 100644
index 000000000..7401d6a68
--- /dev/null
+++ b/arch/powerpc/include/asm/timex.h
@@ -0,0 +1,56 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _ASM_POWERPC_TIMEX_H
+#define _ASM_POWERPC_TIMEX_H
+
+#ifdef __KERNEL__
+
+/*
+ * PowerPC architecture timex specifications
+ */
+
+#include <asm/cputable.h>
+#include <asm/reg.h>
+
+#define CLOCK_TICK_RATE	1024000 /* Underlying HZ */
+
+typedef unsigned long cycles_t;
+
+static inline cycles_t get_cycles(void)
+{
+#ifdef __powerpc64__
+	return mftb();
+#else
+	cycles_t ret;
+
+	/*
+	 * For the "cycle" counter we use the timebase lower half.
+	 * Currently only used on SMP.
+	 */
+
+	ret = 0;
+
+	__asm__ __volatile__(
+#ifdef CONFIG_PPC_8xx
+		"97:	mftb %0\n"
+#else
+		"97:	mfspr %0, %2\n"
+#endif
+		"99:\n"
+		".section __ftr_fixup,\"a\"\n"
+		".align 2\n"
+		"98:\n"
+		"	.long %1\n"
+		"	.long 0\n"
+		"	.long 97b-98b\n"
+		"	.long 99b-98b\n"
+		"	.long 0\n"
+		"	.long 0\n"
+		".previous"
+		: "=r" (ret) : "i" (CPU_FTR_601), "i" (SPRN_TBRL));
+	return ret;
+#endif
+}
+#define get_cycles get_cycles
+
+#endif	/* __KERNEL__ */
+#endif	/* _ASM_POWERPC_TIMEX_H */