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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162636465/* SPDX-License-Identifier: GPL-2.0 *//* NG4patch.S: Patch Ultra-I routines with Niagara-4 variant. * * Copyright (C) 2012 David S. Miller <davem@davemloft.net> */
#include <linux/linkage.h>
#define BRANCH_ALWAYS 0x10680000#define NOP 0x01000000#define NG_DO_PATCH(OLD, NEW) \ sethi %hi(NEW), %g1; \ or %g1, %lo(NEW), %g1; \ sethi %hi(OLD), %g2; \ or %g2, %lo(OLD), %g2; \ sub %g1, %g2, %g1; \ sethi %hi(BRANCH_ALWAYS), %g3; \ sll %g1, 11, %g1; \ srl %g1, 11 + 2, %g1; \ or %g3, %lo(BRANCH_ALWAYS), %g3; \ or %g3, %g1, %g3; \ stw %g3, [%g2]; \ sethi %hi(NOP), %g3; \ or %g3, %lo(NOP), %g3; \ stw %g3, [%g2 + 0x4]; \ flush %g2;
.globl niagara4_patch_copyops .type niagara4_patch_copyops,#functionniagara4_patch_copyops: NG_DO_PATCH(memcpy, NG4memcpy) NG_DO_PATCH(raw_copy_from_user, NG4copy_from_user) NG_DO_PATCH(raw_copy_to_user, NG4copy_to_user) retl nop .size niagara4_patch_copyops,.-niagara4_patch_copyops
.globl niagara4_patch_bzero .type niagara4_patch_bzero,#functionniagara4_patch_bzero: NG_DO_PATCH(memset, NG4memset) NG_DO_PATCH(__bzero, NG4bzero) NG_DO_PATCH(__clear_user, NGclear_user) NG_DO_PATCH(tsb_init, NGtsb_init) retl nop .size niagara4_patch_bzero,.-niagara4_patch_bzero
.globl niagara4_patch_pageops .type niagara4_patch_pageops,#functionniagara4_patch_pageops: NG_DO_PATCH(copy_user_page, NG4copy_user_page) NG_DO_PATCH(_clear_page, NG4clear_page) NG_DO_PATCH(clear_user_page, NG4clear_user_page) retl nop .size niagara4_patch_pageops,.-niagara4_patch_pageops
ENTRY(niagara4_patch_fls) NG_DO_PATCH(fls, NG4fls) NG_DO_PATCH(__fls, __NG4fls) retl nopENDPROC(niagara4_patch_fls)