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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
commitace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch)
treeb2d64bc10158fdd5497876388cd68142ca374ed3 /arch/sparc/lib/U1copy_to_user.S
parentInitial commit. (diff)
downloadlinux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz
linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/sparc/lib/U1copy_to_user.S')
-rw-r--r--arch/sparc/lib/U1copy_to_user.S38
1 files changed, 38 insertions, 0 deletions
diff --git a/arch/sparc/lib/U1copy_to_user.S b/arch/sparc/lib/U1copy_to_user.S
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+/* SPDX-License-Identifier: GPL-2.0 */
+/* U1copy_to_user.S: UltraSparc-I/II/IIi/IIe optimized copy to userspace.
+ *
+ * Copyright (C) 1999, 2000, 2004 David S. Miller (davem@redhat.com)
+ */
+
+#define EX_ST(x,y) \
+98: x; \
+ .section __ex_table,"a";\
+ .align 4; \
+ .word 98b, y; \
+ .text; \
+ .align 4;
+
+#define EX_ST_FP(x,y) \
+98: x; \
+ .section __ex_table,"a";\
+ .align 4; \
+ .word 98b, y; \
+ .text; \
+ .align 4;
+
+#define FUNC_NAME raw_copy_to_user
+#define STORE(type,src,addr) type##a src, [addr] ASI_AIUS
+#define STORE_BLK(src,addr) stda src, [addr] ASI_BLK_AIUS
+#define EX_RETVAL(x) 0
+
+ /* Writing to %asi is _expensive_ so we hardcode it.
+ * Reading %asi to check for KERNEL_DS is comparatively
+ * cheap.
+ */
+#define PREAMBLE \
+ rd %asi, %g1; \
+ cmp %g1, ASI_AIUS; \
+ bne,pn %icc, raw_copy_in_user; \
+ nop; \
+
+#include "U1memcpy.S"