| rjw | 1f88458 | 2022-01-06 17:20:42 +0800 | [diff] [blame^] | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| 2 | /* NG4patch.S: Patch Ultra-I routines with Niagara-4 variant. |
| 3 | * |
| 4 | * Copyright (C) 2012 David S. Miller <davem@davemloft.net> |
| 5 | */ |
| 6 | |
| 7 | #define BRANCH_ALWAYS 0x10680000 |
| 8 | #define NOP 0x01000000 |
| 9 | #define NG_DO_PATCH(OLD, NEW) \ |
| 10 | sethi %hi(NEW), %g1; \ |
| 11 | or %g1, %lo(NEW), %g1; \ |
| 12 | sethi %hi(OLD), %g2; \ |
| 13 | or %g2, %lo(OLD), %g2; \ |
| 14 | sub %g1, %g2, %g1; \ |
| 15 | sethi %hi(BRANCH_ALWAYS), %g3; \ |
| 16 | sll %g1, 11, %g1; \ |
| 17 | srl %g1, 11 + 2, %g1; \ |
| 18 | or %g3, %lo(BRANCH_ALWAYS), %g3; \ |
| 19 | or %g3, %g1, %g3; \ |
| 20 | stw %g3, [%g2]; \ |
| 21 | sethi %hi(NOP), %g3; \ |
| 22 | or %g3, %lo(NOP), %g3; \ |
| 23 | stw %g3, [%g2 + 0x4]; \ |
| 24 | flush %g2; |
| 25 | |
| 26 | .globl niagara4_patch_copyops |
| 27 | .type niagara4_patch_copyops,#function |
| 28 | niagara4_patch_copyops: |
| 29 | NG_DO_PATCH(memcpy, NG4memcpy) |
| 30 | NG_DO_PATCH(raw_copy_from_user, NG4copy_from_user) |
| 31 | NG_DO_PATCH(raw_copy_to_user, NG4copy_to_user) |
| 32 | retl |
| 33 | nop |
| 34 | .size niagara4_patch_copyops,.-niagara4_patch_copyops |
| 35 | |
| 36 | .globl niagara4_patch_bzero |
| 37 | .type niagara4_patch_bzero,#function |
| 38 | niagara4_patch_bzero: |
| 39 | NG_DO_PATCH(memset, NG4memset) |
| 40 | NG_DO_PATCH(__bzero, NG4bzero) |
| 41 | NG_DO_PATCH(__clear_user, NGclear_user) |
| 42 | NG_DO_PATCH(tsb_init, NGtsb_init) |
| 43 | retl |
| 44 | nop |
| 45 | .size niagara4_patch_bzero,.-niagara4_patch_bzero |
| 46 | |
| 47 | .globl niagara4_patch_pageops |
| 48 | .type niagara4_patch_pageops,#function |
| 49 | niagara4_patch_pageops: |
| 50 | NG_DO_PATCH(copy_user_page, NG4copy_user_page) |
| 51 | NG_DO_PATCH(_clear_page, NG4clear_page) |
| 52 | NG_DO_PATCH(clear_user_page, NG4clear_user_page) |
| 53 | retl |
| 54 | nop |
| 55 | .size niagara4_patch_pageops,.-niagara4_patch_pageops |