diff options
| author | Catalin Marinas <catalin.marinas@arm.com> | 2012-03-05 12:49:26 +0100 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2012-09-17 11:24:44 +0200 |
| commit | 0be7320a635c2e434e8b67e0e9474a85ceb421c4 (patch) | |
| tree | 1c2097fe020e4308b159b7819d183e81c44fdb2a /arch/arm64/mm | |
| parent | generic: Implement generic ffs/fls using __builtin_* functions (diff) | |
| download | linux-0be7320a635c2e434e8b67e0e9474a85ceb421c4.tar.xz linux-0be7320a635c2e434e8b67e0e9474a85ceb421c4.zip | |
arm64: Assembly macros and definitions
This patch introduces several assembly macros and definitions used in
the .S files across arch/arm64/ like IRQ disabling/enabling, together
with asm-offsets.c.
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Nicolas Pitre <nico@linaro.org>
Acked-by: Olof Johansson <olof@lixom.net>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Diffstat (limited to 'arch/arm64/mm')
| -rw-r--r-- | arch/arm64/mm/proc-macros.S | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/arch/arm64/mm/proc-macros.S b/arch/arm64/mm/proc-macros.S new file mode 100644 index 000000000000..8957b822010b --- /dev/null +++ b/arch/arm64/mm/proc-macros.S @@ -0,0 +1,55 @@ +/* + * Based on arch/arm/mm/proc-macros.S + * + * Copyright (C) 2012 ARM Ltd. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#include <asm/asm-offsets.h> +#include <asm/thread_info.h> + +/* + * vma_vm_mm - get mm pointer from vma pointer (vma->vm_mm) + */ + .macro vma_vm_mm, rd, rn + ldr \rd, [\rn, #VMA_VM_MM] + .endm + +/* + * mmid - get context id from mm pointer (mm->context.id) + */ + .macro mmid, rd, rn + ldr \rd, [\rn, #MM_CONTEXT_ID] + .endm + +/* + * dcache_line_size - get the minimum D-cache line size from the CTR register. + */ + .macro dcache_line_size, reg, tmp + mrs \tmp, ctr_el0 // read CTR + lsr \tmp, \tmp, #16 + and \tmp, \tmp, #0xf // cache line size encoding + mov \reg, #4 // bytes per word + lsl \reg, \reg, \tmp // actual cache line size + .endm + +/* + * icache_line_size - get the minimum I-cache line size from the CTR register. + */ + .macro icache_line_size, reg, tmp + mrs \tmp, ctr_el0 // read CTR + and \tmp, \tmp, #0xf // cache line size encoding + mov \reg, #4 // bytes per word + lsl \reg, \reg, \tmp // actual cache line size + .endm |