| David S. Miller | cf5adce | 2007-08-16 01:47:25 -0700 | [diff] [blame] | 1 | /* NG2patch.S: Patch Ultra-I routines with Niagara-2 variant. |
| 2 | * |
| 3 | * Copyright (C) 2007 David S. Miller <davem@davemloft.net> |
| 4 | */ |
| 5 | |
| 6 | #define BRANCH_ALWAYS 0x10680000 |
| 7 | #define NOP 0x01000000 |
| 8 | #define NG_DO_PATCH(OLD, NEW) \ |
| 9 | sethi %hi(NEW), %g1; \ |
| 10 | or %g1, %lo(NEW), %g1; \ |
| 11 | sethi %hi(OLD), %g2; \ |
| 12 | or %g2, %lo(OLD), %g2; \ |
| 13 | sub %g1, %g2, %g1; \ |
| 14 | sethi %hi(BRANCH_ALWAYS), %g3; \ |
| 15 | sll %g1, 11, %g1; \ |
| 16 | srl %g1, 11 + 2, %g1; \ |
| 17 | or %g3, %lo(BRANCH_ALWAYS), %g3; \ |
| 18 | or %g3, %g1, %g3; \ |
| 19 | stw %g3, [%g2]; \ |
| 20 | sethi %hi(NOP), %g3; \ |
| 21 | or %g3, %lo(NOP), %g3; \ |
| 22 | stw %g3, [%g2 + 0x4]; \ |
| 23 | flush %g2; |
| 24 | |
| 25 | .globl niagara2_patch_copyops |
| 26 | .type niagara2_patch_copyops,#function |
| 27 | niagara2_patch_copyops: |
| 28 | NG_DO_PATCH(memcpy, NG2memcpy) |
| 29 | NG_DO_PATCH(___copy_from_user, NG2copy_from_user) |
| 30 | NG_DO_PATCH(___copy_to_user, NG2copy_to_user) |
| 31 | retl |
| 32 | nop |
| 33 | .size niagara2_patch_copyops,.-niagara2_patch_copyops |