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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-27 10:05:51 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-27 10:05:51 +0000
commit5d1646d90e1f2cceb9f0828f4b28318cd0ec7744 (patch)
treea94efe259b9009378be6d90eb30d2b019d95c194 /arch/sparc/lib/NG4copy_from_user.S
parentInitial commit. (diff)
downloadlinux-upstream/5.10.209.tar.xz
linux-upstream/5.10.209.zip
Adding upstream version 5.10.209.upstream/5.10.209upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/sparc/lib/NG4copy_from_user.S')
-rw-r--r--arch/sparc/lib/NG4copy_from_user.S39
1 files changed, 39 insertions, 0 deletions
diff --git a/arch/sparc/lib/NG4copy_from_user.S b/arch/sparc/lib/NG4copy_from_user.S
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+/* SPDX-License-Identifier: GPL-2.0 */
+/* NG4copy_from_user.S: Niagara-4 optimized copy from userspace.
+ *
+ * Copyright (C) 2012 David S. Miller (davem@davemloft.net)
+ */
+
+#define EX_LD(x, y) \
+98: x; \
+ .section __ex_table,"a";\
+ .align 4; \
+ .word 98b, y; \
+ .text; \
+ .align 4;
+
+#define EX_LD_FP(x,y) \
+98: x; \
+ .section __ex_table,"a";\
+ .align 4; \
+ .word 98b, y##_fp; \
+ .text; \
+ .align 4;
+
+#ifndef ASI_AIUS
+#define ASI_AIUS 0x11
+#endif
+
+#define FUNC_NAME NG4copy_from_user
+#define LOAD(type,addr,dest) type##a [addr] %asi, dest
+#define EX_RETVAL(x) 0
+
+#ifdef __KERNEL__
+#define PREAMBLE \
+ rd %asi, %g1; \
+ cmp %g1, ASI_AIUS; \
+ bne,pn %icc, raw_copy_in_user; \
+ nop
+#endif
+
+#include "NG4memcpy.S"