summaryrefslogtreecommitdiffstats
path: root/arch/csky/abiv2/inc/abi/cacheflush.h
diff options
context:
space:
mode:
Diffstat (limited to 'arch/csky/abiv2/inc/abi/cacheflush.h')
-rw-r--r--arch/csky/abiv2/inc/abi/cacheflush.h55
1 files changed, 55 insertions, 0 deletions
diff --git a/arch/csky/abiv2/inc/abi/cacheflush.h b/arch/csky/abiv2/inc/abi/cacheflush.h
new file mode 100644
index 000000000..a565e00c3
--- /dev/null
+++ b/arch/csky/abiv2/inc/abi/cacheflush.h
@@ -0,0 +1,55 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+
+#ifndef __ABI_CSKY_CACHEFLUSH_H
+#define __ABI_CSKY_CACHEFLUSH_H
+
+/* Keep includes the same across arches. */
+#include <linux/mm.h>
+
+/*
+ * The cache doesn't need to be flushed when TLB entries change when
+ * the cache is mapped to physical memory, not virtual memory
+ */
+#define flush_cache_all() do { } while (0)
+#define flush_cache_mm(mm) do { } while (0)
+#define flush_cache_dup_mm(mm) do { } while (0)
+#define flush_cache_range(vma, start, end) do { } while (0)
+#define flush_cache_page(vma, vmaddr, pfn) do { } while (0)
+
+#define PG_dcache_clean PG_arch_1
+
+#define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 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 flush_dcache_mmap_lock(mapping) do { } while (0)
+#define flush_dcache_mmap_unlock(mapping) do { } while (0)
+#define flush_icache_page(vma, page) do { } while (0)
+
+#define flush_icache_range(start, end) cache_wbinv_range(start, end)
+
+void flush_icache_mm_range(struct mm_struct *mm,
+ unsigned long start, unsigned long end);
+void flush_icache_deferred(struct mm_struct *mm);
+
+#define flush_cache_vmap(start, end) do { } while (0)
+#define flush_cache_vunmap(start, end) do { } while (0)
+
+#define copy_to_user_page(vma, page, vaddr, dst, src, len) \
+do { \
+ memcpy(dst, src, len); \
+ if (vma->vm_flags & VM_EXEC) { \
+ dcache_wb_range((unsigned long)dst, \
+ (unsigned long)dst + len); \
+ flush_icache_mm_range(current->mm, \
+ (unsigned long)dst, \
+ (unsigned long)dst + len); \
+ } \
+} while (0)
+#define copy_from_user_page(vma, page, vaddr, dst, src, len) \
+ memcpy(dst, src, len)
+
+#endif /* __ABI_CSKY_CACHEFLUSH_H */