1 files changed, 75 insertions, 0 deletions
diff --git a/arch/csky/abiv1/cacheflush.c b/arch/csky/abiv1/cacheflush.c
new file mode 100644
index 000000000..171e8fb32
--- /dev/null
+++ b/arch/csky/abiv1/cacheflush.c
@@ -0,0 +1,75 @@
+// 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>
+#include <asm/tlbflush.h>
+
+#define PG_dcache_clean		PG_arch_1
+
+void flush_dcache_folio(struct folio *folio)
+{
+	struct address_space *mapping;
+
+	if (is_zero_pfn(folio_pfn(folio)))
+		return;
+
+	mapping = folio_flush_mapping(folio);
+
+	if (mapping && !folio_mapped(folio))
+		clear_bit(PG_dcache_clean, &folio->flags);
+	else {
+		dcache_wbinv_all();
+		if (mapping)
+			icache_inv_all();
+		set_bit(PG_dcache_clean, &folio->flags);
+	}
+}
+EXPORT_SYMBOL(flush_dcache_folio);
+
+void flush_dcache_page(struct page *page)
+{
+	flush_dcache_folio(page_folio(page));
+}
+EXPORT_SYMBOL(flush_dcache_page);
+
+void update_mmu_cache_range(struct vm_fault *vmf, struct vm_area_struct *vma,
+		unsigned long addr, pte_t *ptep, unsigned int nr)
+{
+	unsigned long pfn = pte_pfn(*ptep);
+	struct folio *folio;
+
+	flush_tlb_page(vma, addr);
+
+	if (!pfn_valid(pfn))
+		return;
+
+	if (is_zero_pfn(pfn))
+		return;
+
+	folio = page_folio(pfn_to_page(pfn));
+	if (!test_and_set_bit(PG_dcache_clean, &folio->flags))
+		dcache_wbinv_all();
+
+	if (folio_flush_mapping(folio)) {
+		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();
+}