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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-06 01:02:30 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-06 01:02:30 +0000 |
| commit | 76cb841cb886eef6b3bee341a2266c76578724ad (patch) | |
| tree | f5892e5ba6cc11949952a6ce4ecbe6d516d6ce58 /arch/sparc/lib/M7patch.S | |
| parent | Initial commit. (diff) | |
| download | linux-76cb841cb886eef6b3bee341a2266c76578724ad.tar.xz linux-76cb841cb886eef6b3bee341a2266c76578724ad.zip | |
Adding upstream version 4.19.249.upstream/4.19.249
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/sparc/lib/M7patch.S')
| -rw-r--r-- | arch/sparc/lib/M7patch.S | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/arch/sparc/lib/M7patch.S b/arch/sparc/lib/M7patch.S new file mode 100644 index 000000000..9000b7bc5 --- /dev/null +++ b/arch/sparc/lib/M7patch.S @@ -0,0 +1,51 @@ +/* + * M7patch.S: Patch generic routines with M7 variant. + * + * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved. + */ + +#include <linux/linkage.h> + +#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; + +ENTRY(m7_patch_copyops) + NG_DO_PATCH(memcpy, M7memcpy) + NG_DO_PATCH(raw_copy_from_user, M7copy_from_user) + NG_DO_PATCH(raw_copy_to_user, M7copy_to_user) + retl + nop +ENDPROC(m7_patch_copyops) + +ENTRY(m7_patch_bzero) + NG_DO_PATCH(memset, M7memset) + NG_DO_PATCH(__bzero, M7bzero) + NG_DO_PATCH(__clear_user, NGclear_user) + NG_DO_PATCH(tsb_init, NGtsb_init) + retl + nop +ENDPROC(m7_patch_bzero) + +ENTRY(m7_patch_pageops) + NG_DO_PATCH(copy_user_page, NG4copy_user_page) + NG_DO_PATCH(_clear_page, M7clear_page) + NG_DO_PATCH(clear_user_page, M7clear_user_page) + retl + nop +ENDPROC(m7_patch_pageops) |