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| /* SPDX-License-Identifier: GPL-2.0 */
| /* U3patch.S: Patch Ultra-I routines with Ultra-III variant.
| *
| * Copyright (C) 2004 David S. Miller <davem@redhat.com>
| */
|
| #define BRANCH_ALWAYS 0x10680000
| #define NOP 0x01000000
| #define ULTRA3_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 cheetah_patch_copyops
| .type cheetah_patch_copyops,#function
| cheetah_patch_copyops:
| ULTRA3_DO_PATCH(memcpy, U3memcpy)
| ULTRA3_DO_PATCH(raw_copy_from_user, U3copy_from_user)
| ULTRA3_DO_PATCH(raw_copy_to_user, U3copy_to_user)
| retl
| nop
| .size cheetah_patch_copyops,.-cheetah_patch_copyops
|
|
