projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| 6c70b6fc DM |
2 | /* GENpatch.S: Patch Ultra-I routines with generic variant. |
| 3 | * | |
| 4 | * Copyright (C) 2007 David S. Miller <davem@davemloft.net> | |
| 5 | */ | |
| 6 | ||
| 7 | #define BRANCH_ALWAYS 0x10680000 | |
| 8 | #define NOP 0x01000000 | |
| 9 | #define GEN_DO_PATCH(OLD, NEW) \ | |
| 10 | sethi %hi(NEW), %g1; \ | |
| 11 | or %g1, %lo(NEW), %g1; \ | |
| 12 | sethi %hi(OLD), %g2; \ | |
| 13 | or %g2, %lo(OLD), %g2; \ | |
| 14 | sub %g1, %g2, %g1; \ | |
| 15 | sethi %hi(BRANCH_ALWAYS), %g3; \ | |
| 16 | sll %g1, 11, %g1; \ | |
| 17 | srl %g1, 11 + 2, %g1; \ | |
| 18 | or %g3, %lo(BRANCH_ALWAYS), %g3; \ | |
| 19 | or %g3, %g1, %g3; \ | |
| 20 | stw %g3, [%g2]; \ | |
| 21 | sethi %hi(NOP), %g3; \ | |
| 22 | or %g3, %lo(NOP), %g3; \ | |
| 23 | stw %g3, [%g2 + 0x4]; \ | |
| 24 | flush %g2; | |
| 25 | ||
| 26 | .globl generic_patch_copyops | |
| 27 | .type generic_patch_copyops,#function | |
| 28 | generic_patch_copyops: | |
| 29 | GEN_DO_PATCH(memcpy, GENmemcpy) | |
| 31af2f36 AV |
30 | GEN_DO_PATCH(raw_copy_from_user, GENcopy_from_user) |
| 31 | GEN_DO_PATCH(raw_copy_to_user, GENcopy_to_user) | |
| 6c70b6fc DM |
32 | retl |
| 33 | nop | |
| 34 | .size generic_patch_copyops,.-generic_patch_copyops |