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- /* 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,#function
- niagara4_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,#function
- niagara4_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,#function
- niagara4_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
- nop
- ENDPROC(niagara4_patch_fls)
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