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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-06 01:02:30 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-06 01:02:30 +0000 |
| commit | 76cb841cb886eef6b3bee341a2266c76578724ad (patch) | |
| tree | f5892e5ba6cc11949952a6ce4ecbe6d516d6ce58 /arch/powerpc/include/asm/timex.h | |
| parent | Initial commit. (diff) | |
| download | linux-76cb841cb886eef6b3bee341a2266c76578724ad.tar.xz linux-76cb841cb886eef6b3bee341a2266c76578724ad.zip | |
Adding upstream version 4.19.249.upstream/4.19.249
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/powerpc/include/asm/timex.h')
| -rw-r--r-- | arch/powerpc/include/asm/timex.h | 56 |
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 */ |