diff options
Diffstat (limited to 'arch/riscv/include/asm/cacheflush.h')
-rw-r--r-- | arch/riscv/include/asm/cacheflush.h | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/arch/riscv/include/asm/cacheflush.h b/arch/riscv/include/asm/cacheflush.h new file mode 100644 index 000000000..f6fbe7042 --- /dev/null +++ b/arch/riscv/include/asm/cacheflush.h @@ -0,0 +1,62 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Copyright (C) 2015 Regents of the University of California + */ + +#ifndef _ASM_RISCV_CACHEFLUSH_H +#define _ASM_RISCV_CACHEFLUSH_H + +#include <linux/mm.h> + +static inline void local_flush_icache_all(void) +{ + asm volatile ("fence.i" ::: "memory"); +} + +#define PG_dcache_clean PG_arch_1 + +static inline void flush_dcache_page(struct page *page) +{ + if (test_bit(PG_dcache_clean, &page->flags)) + clear_bit(PG_dcache_clean, &page->flags); +} +#define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 1 + +/* + * RISC-V doesn't have an instruction to flush parts of the instruction cache, + * so instead we just flush the whole thing. + */ +#define flush_icache_range(start, end) flush_icache_all() +#define flush_icache_user_page(vma, pg, addr, len) \ + flush_icache_mm(vma->vm_mm, 0) + +#ifndef CONFIG_SMP + +#define flush_icache_all() local_flush_icache_all() +#define flush_icache_mm(mm, local) flush_icache_all() + +#else /* CONFIG_SMP */ + +void flush_icache_all(void); +void flush_icache_mm(struct mm_struct *mm, bool local); + +#endif /* CONFIG_SMP */ + +extern unsigned int riscv_cbom_block_size; +void riscv_init_cbom_blocksize(void); + +#ifdef CONFIG_RISCV_DMA_NONCOHERENT +void riscv_noncoherent_supported(void); +#else +static inline void riscv_noncoherent_supported(void) {} +#endif + +/* + * Bits in sys_riscv_flush_icache()'s flags argument. + */ +#define SYS_RISCV_FLUSH_ICACHE_LOCAL 1UL +#define SYS_RISCV_FLUSH_ICACHE_ALL (SYS_RISCV_FLUSH_ICACHE_LOCAL) + +#include <asm-generic/cacheflush.h> + +#endif /* _ASM_RISCV_CACHEFLUSH_H */ |