| Message ID | 20230726074218.32933-1-wang_yang6662023@163.com (mailing list archive) |
|---|---|
| State | Handled Elsewhere |
| Headers | show |
| Series | RISC-V: Use GCC __builtin_prefetch() to implement prefetch(). GCC's __builtin_prefetch() was introduced a long time ago, all supported GCC versions have it.So this patch is to use it for implementing the prefetch. RISC-V Cache Management Operation instruc | expand |
diff --git a/arch/riscv/include/asm/processor.h b/arch/riscv/include/asm/processor.h index c950a8d9edef..f16d4c85ca5b 100644 --- a/arch/riscv/include/asm/processor.h +++ b/arch/riscv/include/asm/processor.h @@ -70,6 +70,17 @@ extern void start_thread(struct pt_regs *regs, extern unsigned long __get_wchan(struct task_struct *p); +#define ARCH_HAS_PREFETCH +static inline void prefetch(const void *ptr) +{ + __builtin_prefetch(ptr, 0, 3); +} + +#define ARCH_HAS_PREFETCHW +static inline void prefetchw(const void *ptr) +{ + __builtin_prefetch(ptr, 1, 3); +} static inline void wait_for_interrupt(void) {
Signed-off-by: Wang Yang <yangwang@nj.iscas.ac.cn> --- arch/riscv/include/asm/processor.h | 11 +++++++++++ 1 file changed, 11 insertions(+)