| Babu Moger | b3a04ed | 2017-08-07 17:52:51 -0600 | [diff] [blame] | 1 | /* |
| 2 | * M7patch.S: Patch generic routines with M7 variant. |
| 3 | * |
| 4 | * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved. |
| 5 | */ |
| 6 | |
| 7 | #include <linux/linkage.h> |
| 8 | |
| 9 | #define BRANCH_ALWAYS 0x10680000 |
| 10 | #define NOP 0x01000000 |
| 11 | #define NG_DO_PATCH(OLD, NEW) \ |
| 12 | sethi %hi(NEW), %g1; \ |
| 13 | or %g1, %lo(NEW), %g1; \ |
| 14 | sethi %hi(OLD), %g2; \ |
| 15 | or %g2, %lo(OLD), %g2; \ |
| 16 | sub %g1, %g2, %g1; \ |
| 17 | sethi %hi(BRANCH_ALWAYS), %g3; \ |
| 18 | sll %g1, 11, %g1; \ |
| 19 | srl %g1, 11 + 2, %g1; \ |
| 20 | or %g3, %lo(BRANCH_ALWAYS), %g3; \ |
| 21 | or %g3, %g1, %g3; \ |
| 22 | stw %g3, [%g2]; \ |
| 23 | sethi %hi(NOP), %g3; \ |
| 24 | or %g3, %lo(NOP), %g3; \ |
| 25 | stw %g3, [%g2 + 0x4]; \ |
| 26 | flush %g2; |
| 27 | |
| 28 | ENTRY(m7_patch_copyops) |
| 29 | NG_DO_PATCH(memcpy, M7memcpy) |
| 30 | NG_DO_PATCH(raw_copy_from_user, M7copy_from_user) |
| 31 | NG_DO_PATCH(raw_copy_to_user, M7copy_to_user) |
| 32 | retl |
| 33 | nop |
| 34 | ENDPROC(m7_patch_copyops) |
| 35 | |
| 36 | ENTRY(m7_patch_bzero) |
| 37 | NG_DO_PATCH(memset, M7memset) |
| 38 | NG_DO_PATCH(__bzero, M7bzero) |
| 39 | NG_DO_PATCH(__clear_user, NGclear_user) |
| 40 | NG_DO_PATCH(tsb_init, NGtsb_init) |
| 41 | retl |
| 42 | nop |
| 43 | ENDPROC(m7_patch_bzero) |
| 44 | |
| 45 | ENTRY(m7_patch_pageops) |
| 46 | NG_DO_PATCH(copy_user_page, NG4copy_user_page) |
| 47 | NG_DO_PATCH(_clear_page, M7clear_page) |
| 48 | NG_DO_PATCH(clear_user_page, M7clear_user_page) |
| 49 | retl |
| 50 | nop |
| 51 | ENDPROC(m7_patch_pageops) |