summaryrefslogtreecommitdiffstats
path: root/arch/sparc/lib/NG2patch.S
diff options
context:
space:
mode:
authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
commit2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch)
tree848558de17fb3008cdf4d861b01ac7781903ce39 /arch/sparc/lib/NG2patch.S
parentInitial commit. (diff)
downloadlinux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz
linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip
Adding upstream version 6.1.76.upstream/6.1.76
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/sparc/lib/NG2patch.S')
-rw-r--r--arch/sparc/lib/NG2patch.S34
1 files changed, 34 insertions, 0 deletions
diff --git a/arch/sparc/lib/NG2patch.S b/arch/sparc/lib/NG2patch.S
new file mode 100644
index 000000000..72431b244
--- /dev/null
+++ b/arch/sparc/lib/NG2patch.S
@@ -0,0 +1,34 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/* NG2patch.S: Patch Ultra-I routines with Niagara-2 variant.
+ *
+ * Copyright (C) 2007 David S. Miller <davem@davemloft.net>
+ */
+
+#define BRANCH_ALWAYS 0x10680000
+#define NOP 0x01000000
+#define NG_DO_PATCH(OLD, NEW) \
+ sethi %hi(NEW), %g1; \
+ or %g1, %lo(NEW), %g1; \
+ sethi %hi(OLD), %g2; \
+ or %g2, %lo(OLD), %g2; \
+ sub %g1, %g2, %g1; \
+ sethi %hi(BRANCH_ALWAYS), %g3; \
+ sll %g1, 11, %g1; \
+ srl %g1, 11 + 2, %g1; \
+ or %g3, %lo(BRANCH_ALWAYS), %g3; \
+ or %g3, %g1, %g3; \
+ stw %g3, [%g2]; \
+ sethi %hi(NOP), %g3; \
+ or %g3, %lo(NOP), %g3; \
+ stw %g3, [%g2 + 0x4]; \
+ flush %g2;
+
+ .globl niagara2_patch_copyops
+ .type niagara2_patch_copyops,#function
+niagara2_patch_copyops:
+ NG_DO_PATCH(memcpy, NG2memcpy)
+ NG_DO_PATCH(raw_copy_from_user, NG2copy_from_user)
+ NG_DO_PATCH(raw_copy_to_user, NG2copy_to_user)
+ retl
+ nop
+ .size niagara2_patch_copyops,.-niagara2_patch_copyops