| /* SPDX-License-Identifier: GPL-2.0 */ |
| /* NG4patch.S: Patch Ultra-I routines with Niagara-4 variant. |
| * |
| * Copyright (C) 2012 David S. Miller <davem@davemloft.net> |
| */ |
| |
| #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; |
| |
| .globl niagara4_patch_copyops |
| .type niagara4_patch_copyops,#function |
| niagara4_patch_copyops: |
| NG_DO_PATCH(memcpy, NG4memcpy) |
| NG_DO_PATCH(raw_copy_from_user, NG4copy_from_user) |
| NG_DO_PATCH(raw_copy_to_user, NG4copy_to_user) |
| retl |
| nop |
| .size niagara4_patch_copyops,.-niagara4_patch_copyops |
| |
| .globl niagara4_patch_bzero |
| .type niagara4_patch_bzero,#function |
| niagara4_patch_bzero: |
| NG_DO_PATCH(memset, NG4memset) |
| NG_DO_PATCH(__bzero, NG4bzero) |
| NG_DO_PATCH(__clear_user, NGclear_user) |
| NG_DO_PATCH(tsb_init, NGtsb_init) |
| retl |
| nop |
| .size niagara4_patch_bzero,.-niagara4_patch_bzero |
| |
| .globl niagara4_patch_pageops |
| .type niagara4_patch_pageops,#function |
| niagara4_patch_pageops: |
| NG_DO_PATCH(copy_user_page, NG4copy_user_page) |
| NG_DO_PATCH(_clear_page, NG4clear_page) |
| NG_DO_PATCH(clear_user_page, NG4clear_user_page) |
| retl |
| nop |
| .size niagara4_patch_pageops,.-niagara4_patch_pageops |
| |
| ENTRY(niagara4_patch_fls) |
| NG_DO_PATCH(fls, NG4fls) |
| NG_DO_PATCH(__fls, __NG4fls) |
| retl |
| nop |
| ENDPROC(niagara4_patch_fls) |
