From 76cb841cb886eef6b3bee341a2266c76578724ad Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Mon, 6 May 2024 03:02:30 +0200 Subject: Adding upstream version 4.19.249. Signed-off-by: Daniel Baumann --- arch/riscv/include/asm/cacheflush.h | 61 +++++++++++++++++++++++++++++++++++++ 1 file changed, 61 insertions(+) create mode 100644 arch/riscv/include/asm/cacheflush.h (limited to 'arch/riscv/include/asm/cacheflush.h') diff --git a/arch/riscv/include/asm/cacheflush.h b/arch/riscv/include/asm/cacheflush.h new file mode 100644 index 000000000..8f1307441 --- /dev/null +++ b/arch/riscv/include/asm/cacheflush.h @@ -0,0 +1,61 @@ +/* + * Copyright (C) 2015 Regents of the University of California + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation, version 2. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#ifndef _ASM_RISCV_CACHEFLUSH_H +#define _ASM_RISCV_CACHEFLUSH_H + +#include + +#undef flush_icache_range +#undef flush_icache_user_range +#undef flush_dcache_page + +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); +} + +/* + * 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_range(vma, pg, addr, len) flush_icache_all() + +#ifndef CONFIG_SMP + +#define flush_icache_all() local_flush_icache_all() +#define flush_icache_mm(mm, local) flush_icache_all() + +#else /* CONFIG_SMP */ + +#define flush_icache_all() sbi_remote_fence_i(NULL) +void flush_icache_mm(struct mm_struct *mm, bool local); + +#endif /* CONFIG_SMP */ + +/* + * 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) + +#endif /* _ASM_RISCV_CACHEFLUSH_H */ -- cgit v1.2.3