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-rw-r--r--arch/csky/abiv1/inc/abi/pgtable-bits.h50
1 files changed, 50 insertions, 0 deletions
diff --git a/arch/csky/abiv1/inc/abi/pgtable-bits.h b/arch/csky/abiv1/inc/abi/pgtable-bits.h
new file mode 100644
index 000000000..752c8b3f9
--- /dev/null
+++ b/arch/csky/abiv1/inc/abi/pgtable-bits.h
@@ -0,0 +1,50 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+
+#ifndef __ASM_CSKY_PGTABLE_BITS_H
+#define __ASM_CSKY_PGTABLE_BITS_H
+
+/* implemented in software */
+#define _PAGE_PRESENT (1<<0)
+#define _PAGE_READ (1<<1)
+#define _PAGE_WRITE (1<<2)
+#define _PAGE_ACCESSED (1<<3)
+#define _PAGE_MODIFIED (1<<4)
+
+/* implemented in hardware */
+#define _PAGE_GLOBAL (1<<6)
+#define _PAGE_VALID (1<<7)
+#define _PAGE_DIRTY (1<<8)
+
+#define _PAGE_CACHE (3<<9)
+#define _PAGE_UNCACHE (2<<9)
+#define _PAGE_SO _PAGE_UNCACHE
+#define _CACHE_MASK (7<<9)
+
+#define _CACHE_CACHED _PAGE_CACHE
+#define _CACHE_UNCACHED _PAGE_UNCACHE
+
+#define _PAGE_PROT_NONE _PAGE_READ
+
+/*
+ * Encode and decode a swap entry
+ *
+ * Format of swap PTE:
+ * bit 0: _PAGE_PRESENT (zero)
+ * bit 1: _PAGE_READ (zero)
+ * bit 2 - 5: swap type[0 - 3]
+ * bit 6: _PAGE_GLOBAL (zero)
+ * bit 7: _PAGE_VALID (zero)
+ * bit 8: swap type[4]
+ * bit 9 - 31: swap offset
+ */
+#define __swp_type(x) ((((x).val >> 2) & 0xf) | \
+ (((x).val >> 4) & 0x10))
+#define __swp_offset(x) ((x).val >> 9)
+#define __swp_entry(type, offset) ((swp_entry_t) { \
+ ((type & 0xf) << 2) | \
+ ((type & 0x10) << 4) | \
+ ((offset) << 9)})
+
+#define HAVE_ARCH_UNMAPPED_AREA
+
+#endif /* __ASM_CSKY_PGTABLE_BITS_H */