1b2441318SGreg Kroah-Hartman/* SPDX-License-Identifier: GPL-2.0 */ 2478b8fecSSam Ravnborg/* NGpatch.S: Patch Ultra-I routines with Niagara variant. 3478b8fecSSam Ravnborg * 4478b8fecSSam Ravnborg * Copyright (C) 2006 David S. Miller <davem@davemloft.net> 5478b8fecSSam Ravnborg */ 6478b8fecSSam Ravnborg 7478b8fecSSam Ravnborg#define BRANCH_ALWAYS 0x10680000 8478b8fecSSam Ravnborg#define NOP 0x01000000 9478b8fecSSam Ravnborg#define NG_DO_PATCH(OLD, NEW) \ 10478b8fecSSam Ravnborg sethi %hi(NEW), %g1; \ 11478b8fecSSam Ravnborg or %g1, %lo(NEW), %g1; \ 12478b8fecSSam Ravnborg sethi %hi(OLD), %g2; \ 13478b8fecSSam Ravnborg or %g2, %lo(OLD), %g2; \ 14478b8fecSSam Ravnborg sub %g1, %g2, %g1; \ 15478b8fecSSam Ravnborg sethi %hi(BRANCH_ALWAYS), %g3; \ 16478b8fecSSam Ravnborg sll %g1, 11, %g1; \ 17478b8fecSSam Ravnborg srl %g1, 11 + 2, %g1; \ 18478b8fecSSam Ravnborg or %g3, %lo(BRANCH_ALWAYS), %g3; \ 19478b8fecSSam Ravnborg or %g3, %g1, %g3; \ 20478b8fecSSam Ravnborg stw %g3, [%g2]; \ 21478b8fecSSam Ravnborg sethi %hi(NOP), %g3; \ 22478b8fecSSam Ravnborg or %g3, %lo(NOP), %g3; \ 23478b8fecSSam Ravnborg stw %g3, [%g2 + 0x4]; \ 24478b8fecSSam Ravnborg flush %g2; 25478b8fecSSam Ravnborg 26478b8fecSSam Ravnborg .globl niagara_patch_copyops 27478b8fecSSam Ravnborg .type niagara_patch_copyops,#function 28478b8fecSSam Ravnborgniagara_patch_copyops: 29478b8fecSSam Ravnborg NG_DO_PATCH(memcpy, NGmemcpy) 3031af2f36SAl Viro NG_DO_PATCH(raw_copy_from_user, NGcopy_from_user) 3131af2f36SAl Viro NG_DO_PATCH(raw_copy_to_user, NGcopy_to_user) 32478b8fecSSam Ravnborg retl 33478b8fecSSam Ravnborg nop 34478b8fecSSam Ravnborg .size niagara_patch_copyops,.-niagara_patch_copyops 35