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0be7320a CM |
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 | |
bd5f6dc3 | 41 | ubfm \tmp, \tmp, #16, #19 // cache line size encoding |
0be7320a CM |
42 | mov \reg, #4 // bytes per word |
43 | lsl \reg, \reg, \tmp // actual cache line size | |
44 | .endm | |
45 | ||
46 | /* | |
47 | * icache_line_size - get the minimum I-cache line size from the CTR register. | |
48 | */ | |
49 | .macro icache_line_size, reg, tmp | |
50 | mrs \tmp, ctr_el0 // read CTR | |
51 | and \tmp, \tmp, #0xf // cache line size encoding | |
52 | mov \reg, #4 // bytes per word | |
53 | lsl \reg, \reg, \tmp // actual cache line size | |
54 | .endm |