1*4882a593Smuzhiyun/* SPDX-License-Identifier: GPL-2.0 */ 2*4882a593Smuzhiyun/* NGpatch.S: Patch Ultra-I routines with Niagara variant. 3*4882a593Smuzhiyun * 4*4882a593Smuzhiyun * Copyright (C) 2006 David S. Miller <davem@davemloft.net> 5*4882a593Smuzhiyun */ 6*4882a593Smuzhiyun 7*4882a593Smuzhiyun#define BRANCH_ALWAYS 0x10680000 8*4882a593Smuzhiyun#define NOP 0x01000000 9*4882a593Smuzhiyun#define NG_DO_PATCH(OLD, NEW) \ 10*4882a593Smuzhiyun sethi %hi(NEW), %g1; \ 11*4882a593Smuzhiyun or %g1, %lo(NEW), %g1; \ 12*4882a593Smuzhiyun sethi %hi(OLD), %g2; \ 13*4882a593Smuzhiyun or %g2, %lo(OLD), %g2; \ 14*4882a593Smuzhiyun sub %g1, %g2, %g1; \ 15*4882a593Smuzhiyun sethi %hi(BRANCH_ALWAYS), %g3; \ 16*4882a593Smuzhiyun sll %g1, 11, %g1; \ 17*4882a593Smuzhiyun srl %g1, 11 + 2, %g1; \ 18*4882a593Smuzhiyun or %g3, %lo(BRANCH_ALWAYS), %g3; \ 19*4882a593Smuzhiyun or %g3, %g1, %g3; \ 20*4882a593Smuzhiyun stw %g3, [%g2]; \ 21*4882a593Smuzhiyun sethi %hi(NOP), %g3; \ 22*4882a593Smuzhiyun or %g3, %lo(NOP), %g3; \ 23*4882a593Smuzhiyun stw %g3, [%g2 + 0x4]; \ 24*4882a593Smuzhiyun flush %g2; 25*4882a593Smuzhiyun 26*4882a593Smuzhiyun .globl niagara_patch_copyops 27*4882a593Smuzhiyun .type niagara_patch_copyops,#function 28*4882a593Smuzhiyunniagara_patch_copyops: 29*4882a593Smuzhiyun NG_DO_PATCH(memcpy, NGmemcpy) 30*4882a593Smuzhiyun NG_DO_PATCH(raw_copy_from_user, NGcopy_from_user) 31*4882a593Smuzhiyun NG_DO_PATCH(raw_copy_to_user, NGcopy_to_user) 32*4882a593Smuzhiyun retl 33*4882a593Smuzhiyun nop 34*4882a593Smuzhiyun .size niagara_patch_copyops,.-niagara_patch_copyops 35