diff options
| author | Catalin Marinas <catalin.marinas@arm.com> | 2012-03-05 11:49:26 +0000 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2012-09-17 10:24:44 +0100 |
| commit | 0be7320a635c2e434e8b67e0e9474a85ceb421c4 (patch) | |
| tree | 1c2097fe020e4308b159b7819d183e81c44fdb2a /arch/arm64/include | |
| parent | 048fa2df92c325cb4425dccd66c8922c8342b507 (diff) | |
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/include')
| -rw-r--r-- | arch/arm64/include/asm/asm-offsets.h | 1 | ||||
| -rw-r--r-- | arch/arm64/include/asm/assembler.h | 109 |
2 files changed, 110 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/asm-offsets.h b/arch/arm64/include/asm/asm-offsets.h new file mode 100644 index 000000000000..d370ee36a182 --- /dev/null +++ b/arch/arm64/include/asm/asm-offsets.h @@ -0,0 +1 @@ +#include <generated/asm-offsets.h> diff --git a/arch/arm64/include/asm/assembler.h b/arch/arm64/include/asm/assembler.h new file mode 100644 index 000000000000..da2a13e8f1e6 --- /dev/null +++ b/arch/arm64/include/asm/assembler.h @@ -0,0 +1,109 @@ +/* + * Based on arch/arm/include/asm/assembler.h + * + * Copyright (C) 1996-2000 Russell King + * 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/>. + */ +#ifndef __ASSEMBLY__ +#error "Only include this from assembly code" +#endif + +#include <asm/ptrace.h> + +/* + * Stack pushing/popping (register pairs only). Equivalent to store decrement + * before, load increment after. + */ + .macro push, xreg1, xreg2 + stp \xreg1, \xreg2, [sp, #-16]! + .endm + + .macro pop, xreg1, xreg2 + ldp \xreg1, \xreg2, [sp], #16 + .endm + +/* + * Enable and disable interrupts. + */ + .macro disable_irq + msr daifset, #2 + .endm + + .macro enable_irq + msr daifclr, #2 + .endm + +/* + * Save/disable and restore interrupts. + */ + .macro save_and_disable_irqs, olddaif + mrs \olddaif, daif + disable_irq + .endm + + .macro restore_irqs, olddaif + msr daif, \olddaif + .endm + +/* + * Enable and disable debug exceptions. + */ + .macro disable_dbg + msr daifset, #8 + .endm + + .macro enable_dbg + msr daifclr, #8 + .endm + + .macro disable_step, tmp + mrs \tmp, mdscr_el1 + bic \tmp, \tmp, #1 + msr mdscr_el1, \tmp + .endm + + .macro enable_step, tmp + mrs \tmp, mdscr_el1 + orr \tmp, \tmp, #1 + msr mdscr_el1, \tmp + .endm + + .macro enable_dbg_if_not_stepping, tmp + mrs \tmp, mdscr_el1 + tbnz \tmp, #1, 9990f + enable_dbg +9990: + .endm + +/* + * SMP data memory barrier + */ + .macro smp_dmb, opt +#ifdef CONFIG_SMP + dmb \opt +#endif + .endm + +#define USER(l, x...) \ +9999: x; \ + .section __ex_table,"a"; \ + .align 3; \ + .quad 9999b,l; \ + .previous + +/* + * Register aliases. + */ +lr .req x30 // link register |