1/* NG4patch.S: Patch Ultra-I routines with Niagara-4 variant. 2 * 3 * Copyright (C) 2012 David S. Miller <davem@davemloft.net> 4 */ 5 6#define BRANCH_ALWAYS 0x10680000 7#define NOP 0x01000000 8#define NG_DO_PATCH(OLD, NEW) \ 9 sethi %hi(NEW), %g1; \ 10 or %g1, %lo(NEW), %g1; \ 11 sethi %hi(OLD), %g2; \ 12 or %g2, %lo(OLD), %g2; \ 13 sub %g1, %g2, %g1; \ 14 sethi %hi(BRANCH_ALWAYS), %g3; \ 15 sll %g1, 11, %g1; \ 16 srl %g1, 11 + 2, %g1; \ 17 or %g3, %lo(BRANCH_ALWAYS), %g3; \ 18 or %g3, %g1, %g3; \ 19 stw %g3, [%g2]; \ 20 sethi %hi(NOP), %g3; \ 21 or %g3, %lo(NOP), %g3; \ 22 stw %g3, [%g2 + 0x4]; \ 23 flush %g2; 24 25 .globl niagara4_patch_copyops 26 .type niagara4_patch_copyops,#function 27niagara4_patch_copyops: 28 NG_DO_PATCH(memcpy, NG4memcpy) 29 NG_DO_PATCH(___copy_from_user, NG4copy_from_user) 30 NG_DO_PATCH(___copy_to_user, NG4copy_to_user) 31 retl 32 nop 33 .size niagara4_patch_copyops,.-niagara4_patch_copyops 34 35 .globl niagara4_patch_bzero 36 .type niagara4_patch_bzero,#function 37niagara4_patch_bzero: 38 NG_DO_PATCH(memset, NG4memset) 39 NG_DO_PATCH(__bzero, NG4bzero) 40 NG_DO_PATCH(__clear_user, NGclear_user) 41 NG_DO_PATCH(tsb_init, NGtsb_init) 42 retl 43 nop 44 .size niagara4_patch_bzero,.-niagara4_patch_bzero 45 46 .globl niagara4_patch_pageops 47 .type niagara4_patch_pageops,#function 48niagara4_patch_pageops: 49 NG_DO_PATCH(copy_user_page, NG4copy_user_page) 50 NG_DO_PATCH(_clear_page, NG4clear_page) 51 NG_DO_PATCH(clear_user_page, NG4clear_user_page) 52 retl 53 nop 54 .size niagara4_patch_pageops,.-niagara4_patch_pageops 55