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Diffstat (limited to '')
-rw-r--r-- | arch/csky/abiv1/cacheflush.c | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/arch/csky/abiv1/cacheflush.c b/arch/csky/abiv1/cacheflush.c new file mode 100644 index 000000000..fb91b069d --- /dev/null +++ b/arch/csky/abiv1/cacheflush.c @@ -0,0 +1,66 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd. + +#include <linux/kernel.h> +#include <linux/mm.h> +#include <linux/fs.h> +#include <linux/pagemap.h> +#include <linux/syscalls.h> +#include <linux/spinlock.h> +#include <asm/page.h> +#include <asm/cache.h> +#include <asm/cacheflush.h> +#include <asm/cachectl.h> + +#define PG_dcache_clean PG_arch_1 + +void flush_dcache_page(struct page *page) +{ + struct address_space *mapping; + + if (page == ZERO_PAGE(0)) + return; + + mapping = page_mapping_file(page); + + if (mapping && !page_mapcount(page)) + clear_bit(PG_dcache_clean, &page->flags); + else { + dcache_wbinv_all(); + if (mapping) + icache_inv_all(); + set_bit(PG_dcache_clean, &page->flags); + } +} +EXPORT_SYMBOL(flush_dcache_page); + +void update_mmu_cache(struct vm_area_struct *vma, unsigned long addr, + pte_t *ptep) +{ + unsigned long pfn = pte_pfn(*ptep); + struct page *page; + + if (!pfn_valid(pfn)) + return; + + page = pfn_to_page(pfn); + if (page == ZERO_PAGE(0)) + return; + + if (!test_and_set_bit(PG_dcache_clean, &page->flags)) + dcache_wbinv_all(); + + if (page_mapping_file(page)) { + if (vma->vm_flags & VM_EXEC) + icache_inv_all(); + } +} + +void flush_cache_range(struct vm_area_struct *vma, unsigned long start, + unsigned long end) +{ + dcache_wbinv_all(); + + if (vma->vm_flags & VM_EXEC) + icache_inv_all(); +} |