| Catalin Marinas | 0be7320 | 2012-03-05 11:49:26 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Based on arch/arm/mm/proc-macros.S |
| 3 | * |
| 4 | * Copyright (C) 2012 ARM Ltd. |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License version 2 as |
| 8 | * published by the Free Software Foundation. |
| 9 | * |
| 10 | * This program is distributed in the hope that it will be useful, |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | * GNU General Public License for more details. |
| 14 | * |
| 15 | * You should have received a copy of the GNU General Public License |
| 16 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 17 | */ |
| 18 | |
| 19 | #include <asm/asm-offsets.h> |
| 20 | #include <asm/thread_info.h> |
| 21 | |
| 22 | /* |
| 23 | * vma_vm_mm - get mm pointer from vma pointer (vma->vm_mm) |
| 24 | */ |
| 25 | .macro vma_vm_mm, rd, rn |
| 26 | ldr \rd, [\rn, #VMA_VM_MM] |
| 27 | .endm |
| 28 | |
| 29 | /* |
| 30 | * mmid - get context id from mm pointer (mm->context.id) |
| 31 | */ |
| 32 | .macro mmid, rd, rn |
| 33 | ldr \rd, [\rn, #MM_CONTEXT_ID] |
| 34 | .endm |
| 35 | |
| 36 | /* |
| 37 | * dcache_line_size - get the minimum D-cache line size from the CTR register. |
| 38 | */ |
| 39 | .macro dcache_line_size, reg, tmp |
| 40 | mrs \tmp, ctr_el0 // read CTR |
| 41 | lsr \tmp, \tmp, #16 |
| 42 | and \tmp, \tmp, #0xf // cache line size encoding |
| 43 | mov \reg, #4 // bytes per word |
| 44 | lsl \reg, \reg, \tmp // actual cache line size |
| 45 | .endm |
| 46 | |
| 47 | /* |
| 48 | * icache_line_size - get the minimum I-cache line size from the CTR register. |
| 49 | */ |
| 50 | .macro icache_line_size, reg, tmp |
| 51 | mrs \tmp, ctr_el0 // read CTR |
| 52 | and \tmp, \tmp, #0xf // cache line size encoding |
| 53 | mov \reg, #4 // bytes per word |
| 54 | lsl \reg, \reg, \tmp // actual cache line size |
| 55 | .endm |