1 /* SPDX-License-Identifier: GPL-2.0-only */
3 * Copyright (C) 2015 Regents of the University of California
6 #ifndef _ASM_RISCV_CACHEFLUSH_H
7 #define _ASM_RISCV_CACHEFLUSH_H
11 static inline void local_flush_icache_all(void)
13 asm volatile ("fence.i" ::: "memory");
16 #define PG_dcache_clean PG_arch_1
18 static inline void flush_dcache_page(struct page *page)
20 if (test_bit(PG_dcache_clean, &page->flags))
21 clear_bit(PG_dcache_clean, &page->flags);
23 #define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 1
26 * RISC-V doesn't have an instruction to flush parts of the instruction cache,
27 * so instead we just flush the whole thing.
29 #define flush_icache_range(start, end) flush_icache_all()
30 #define flush_icache_user_page(vma, pg, addr, len) \
31 flush_icache_mm(vma->vm_mm, 0)
35 #define flush_icache_all() local_flush_icache_all()
36 #define flush_icache_mm(mm, local) flush_icache_all()
38 #else /* CONFIG_SMP */
40 void flush_icache_all(void);
41 void flush_icache_mm(struct mm_struct *mm, bool local);
43 #endif /* CONFIG_SMP */
45 #ifdef CONFIG_RISCV_ISA_ZICBOM
46 void riscv_init_cbom_blocksize(void);
48 static inline void riscv_init_cbom_blocksize(void) { }
51 #ifdef CONFIG_RISCV_DMA_NONCOHERENT
52 void riscv_noncoherent_supported(void);
54 static inline void riscv_noncoherent_supported(void) {}
58 * Bits in sys_riscv_flush_icache()'s flags argument.
60 #define SYS_RISCV_FLUSH_ICACHE_LOCAL 1UL
61 #define SYS_RISCV_FLUSH_ICACHE_ALL (SYS_RISCV_FLUSH_ICACHE_LOCAL)
63 #include <asm-generic/cacheflush.h>
65 #endif /* _ASM_RISCV_CACHEFLUSH_H */