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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)
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