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-rw-r--r--arch/riscv/include/asm/pgtable-32.h36
1 files changed, 36 insertions, 0 deletions
diff --git a/arch/riscv/include/asm/pgtable-32.h b/arch/riscv/include/asm/pgtable-32.h
new file mode 100644
index 000000000..59ba1fbaf
--- /dev/null
+++ b/arch/riscv/include/asm/pgtable-32.h
@@ -0,0 +1,36 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2012 Regents of the University of California
+ */
+
+#ifndef _ASM_RISCV_PGTABLE_32_H
+#define _ASM_RISCV_PGTABLE_32_H
+
+#include <asm-generic/pgtable-nopmd.h>
+#include <linux/bits.h>
+#include <linux/const.h>
+
+/* Size of region mapped by a page global directory */
+#define PGDIR_SHIFT 22
+#define PGDIR_SIZE (_AC(1, UL) << PGDIR_SHIFT)
+#define PGDIR_MASK (~(PGDIR_SIZE - 1))
+
+#define MAX_POSSIBLE_PHYSMEM_BITS 34
+
+/*
+ * rv32 PTE format:
+ * | XLEN-1 10 | 9 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0
+ * PFN reserved for SW D A G U X W R V
+ */
+#define _PAGE_PFN_MASK GENMASK(31, 10)
+
+#define _PAGE_NOCACHE 0
+#define _PAGE_IO 0
+#define _PAGE_MTMASK 0
+
+/* Set of bits to preserve across pte_modify() */
+#define _PAGE_CHG_MASK (~(unsigned long)(_PAGE_PRESENT | _PAGE_READ | \
+ _PAGE_WRITE | _PAGE_EXEC | \
+ _PAGE_USER | _PAGE_GLOBAL))
+
+#endif /* _ASM_RISCV_PGTABLE_32_H */