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 28niagara4_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 38niagara4_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 49niagara4_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 56