Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / arch / powerpc / include / asm / timex.h

diff --git a/kernel/arch/powerpc/include/asm/timex.h b/kernel/arch/powerpc/include/asm/timex.h
new file mode 100644 (file)
index 0000000..2cf846e
--- /dev/null
+++ b/kernel/arch/powerpc/include/asm/timex.h
@@ -0,0 +1,58 @@
+#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_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"
+#ifdef CONFIG_8xx
+               : "=r" (ret) : "i" (CPU_FTR_601));
+#else
+               : "=r" (ret) : "i" (CPU_FTR_601), "i" (SPRN_TBRL));
+#endif
+       return ret;
+#endif
+}
+
+#endif /* __KERNEL__ */
+#endif /* _ASM_POWERPC_TIMEX_H */