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-rw-r--r--arch/loongarch/mm/page.S84
1 files changed, 84 insertions, 0 deletions
diff --git a/arch/loongarch/mm/page.S b/arch/loongarch/mm/page.S
new file mode 100644
index 0000000000..7ad76551d3
--- /dev/null
+++ b/arch/loongarch/mm/page.S
@@ -0,0 +1,84 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2020-2022 Loongson Technology Corporation Limited
+ */
+#include <linux/export.h>
+#include <linux/linkage.h>
+#include <asm/asm.h>
+#include <asm/page.h>
+#include <asm/regdef.h>
+
+ .align 5
+SYM_FUNC_START(clear_page)
+ lu12i.w t0, 1 << (PAGE_SHIFT - 12)
+ add.d t0, t0, a0
+1:
+ st.d zero, a0, 0
+ st.d zero, a0, 8
+ st.d zero, a0, 16
+ st.d zero, a0, 24
+ st.d zero, a0, 32
+ st.d zero, a0, 40
+ st.d zero, a0, 48
+ st.d zero, a0, 56
+ addi.d a0, a0, 128
+ st.d zero, a0, -64
+ st.d zero, a0, -56
+ st.d zero, a0, -48
+ st.d zero, a0, -40
+ st.d zero, a0, -32
+ st.d zero, a0, -24
+ st.d zero, a0, -16
+ st.d zero, a0, -8
+ bne t0, a0, 1b
+
+ jr ra
+SYM_FUNC_END(clear_page)
+EXPORT_SYMBOL(clear_page)
+
+.align 5
+SYM_FUNC_START(copy_page)
+ lu12i.w t8, 1 << (PAGE_SHIFT - 12)
+ add.d t8, t8, a0
+1:
+ ld.d t0, a1, 0
+ ld.d t1, a1, 8
+ ld.d t2, a1, 16
+ ld.d t3, a1, 24
+ ld.d t4, a1, 32
+ ld.d t5, a1, 40
+ ld.d t6, a1, 48
+ ld.d t7, a1, 56
+
+ st.d t0, a0, 0
+ st.d t1, a0, 8
+ ld.d t0, a1, 64
+ ld.d t1, a1, 72
+ st.d t2, a0, 16
+ st.d t3, a0, 24
+ ld.d t2, a1, 80
+ ld.d t3, a1, 88
+ st.d t4, a0, 32
+ st.d t5, a0, 40
+ ld.d t4, a1, 96
+ ld.d t5, a1, 104
+ st.d t6, a0, 48
+ st.d t7, a0, 56
+ ld.d t6, a1, 112
+ ld.d t7, a1, 120
+ addi.d a0, a0, 128
+ addi.d a1, a1, 128
+
+ st.d t0, a0, -64
+ st.d t1, a0, -56
+ st.d t2, a0, -48
+ st.d t3, a0, -40
+ st.d t4, a0, -32
+ st.d t5, a0, -24
+ st.d t6, a0, -16
+ st.d t7, a0, -8
+
+ bne t8, a0, 1b
+ jr ra
+SYM_FUNC_END(copy_page)
+EXPORT_SYMBOL(copy_page)