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