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| /*
| * 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)
|
|
