| /* | |
| * 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) |