1*4882a593Smuzhiyun/* 2*4882a593Smuzhiyun * M7patch.S: Patch generic routines with M7 variant. 3*4882a593Smuzhiyun * 4*4882a593Smuzhiyun * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved. 5*4882a593Smuzhiyun */ 6*4882a593Smuzhiyun 7*4882a593Smuzhiyun#include <linux/linkage.h> 8*4882a593Smuzhiyun 9*4882a593Smuzhiyun#define BRANCH_ALWAYS 0x10680000 10*4882a593Smuzhiyun#define NOP 0x01000000 11*4882a593Smuzhiyun#define NG_DO_PATCH(OLD, NEW) \ 12*4882a593Smuzhiyun sethi %hi(NEW), %g1; \ 13*4882a593Smuzhiyun or %g1, %lo(NEW), %g1; \ 14*4882a593Smuzhiyun sethi %hi(OLD), %g2; \ 15*4882a593Smuzhiyun or %g2, %lo(OLD), %g2; \ 16*4882a593Smuzhiyun sub %g1, %g2, %g1; \ 17*4882a593Smuzhiyun sethi %hi(BRANCH_ALWAYS), %g3; \ 18*4882a593Smuzhiyun sll %g1, 11, %g1; \ 19*4882a593Smuzhiyun srl %g1, 11 + 2, %g1; \ 20*4882a593Smuzhiyun or %g3, %lo(BRANCH_ALWAYS), %g3; \ 21*4882a593Smuzhiyun or %g3, %g1, %g3; \ 22*4882a593Smuzhiyun stw %g3, [%g2]; \ 23*4882a593Smuzhiyun sethi %hi(NOP), %g3; \ 24*4882a593Smuzhiyun or %g3, %lo(NOP), %g3; \ 25*4882a593Smuzhiyun stw %g3, [%g2 + 0x4]; \ 26*4882a593Smuzhiyun flush %g2; 27*4882a593Smuzhiyun 28*4882a593SmuzhiyunENTRY(m7_patch_copyops) 29*4882a593Smuzhiyun NG_DO_PATCH(memcpy, M7memcpy) 30*4882a593Smuzhiyun NG_DO_PATCH(raw_copy_from_user, M7copy_from_user) 31*4882a593Smuzhiyun NG_DO_PATCH(raw_copy_to_user, M7copy_to_user) 32*4882a593Smuzhiyun retl 33*4882a593Smuzhiyun nop 34*4882a593SmuzhiyunENDPROC(m7_patch_copyops) 35*4882a593Smuzhiyun 36*4882a593SmuzhiyunENTRY(m7_patch_bzero) 37*4882a593Smuzhiyun NG_DO_PATCH(memset, M7memset) 38*4882a593Smuzhiyun NG_DO_PATCH(__bzero, M7bzero) 39*4882a593Smuzhiyun NG_DO_PATCH(__clear_user, NGclear_user) 40*4882a593Smuzhiyun NG_DO_PATCH(tsb_init, NGtsb_init) 41*4882a593Smuzhiyun retl 42*4882a593Smuzhiyun nop 43*4882a593SmuzhiyunENDPROC(m7_patch_bzero) 44*4882a593Smuzhiyun 45*4882a593SmuzhiyunENTRY(m7_patch_pageops) 46*4882a593Smuzhiyun NG_DO_PATCH(copy_user_page, NG4copy_user_page) 47*4882a593Smuzhiyun NG_DO_PATCH(_clear_page, M7clear_page) 48*4882a593Smuzhiyun NG_DO_PATCH(clear_user_page, M7clear_user_page) 49*4882a593Smuzhiyun retl 50*4882a593Smuzhiyun nop 51*4882a593SmuzhiyunENDPROC(m7_patch_pageops) 52