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author | Marc Zyngier <marc.zyngier@arm.com> | 2012-03-05 12:49:29 +0100 |
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committer | Catalin Marinas <catalin.marinas@arm.com> | 2012-09-17 14:42:02 +0200 |
commit | fb9bd7d6df81ddf1e7ab6648ac89ddbe0625b26b (patch) | |
tree | c0c91b6db58b4c9b70e63cf02cdb0a73fe0ac3e8 /arch/arm64/include/asm/irqflags.h | |
parent | arm64: TLB maintenance functionality (diff) | |
download | linux-fb9bd7d6df81ddf1e7ab6648ac89ddbe0625b26b.tar.xz linux-fb9bd7d6df81ddf1e7ab6648ac89ddbe0625b26b.zip |
arm64: IRQ handling
This patch adds the support for IRQ handling. The actual interrupt
controller will be part of a separate patch (going into
drivers/irqchip/).
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
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: 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/asm/irqflags.h')
-rw-r--r-- | arch/arm64/include/asm/irqflags.h | 91 |
1 files changed, 91 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/irqflags.h b/arch/arm64/include/asm/irqflags.h new file mode 100644 index 000000000000..aa11943b8502 --- /dev/null +++ b/arch/arm64/include/asm/irqflags.h @@ -0,0 +1,91 @@ +/* + * 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 __ASM_IRQFLAGS_H +#define __ASM_IRQFLAGS_H + +#ifdef __KERNEL__ + +#include <asm/ptrace.h> + +/* + * CPU interrupt mask handling. + */ +static inline unsigned long arch_local_irq_save(void) +{ + unsigned long flags; + asm volatile( + "mrs %0, daif // arch_local_irq_save\n" + "msr daifset, #2" + : "=r" (flags) + : + : "memory"); + return flags; +} + +static inline void arch_local_irq_enable(void) +{ + asm volatile( + "msr daifclr, #2 // arch_local_irq_enable" + : + : + : "memory"); +} + +static inline void arch_local_irq_disable(void) +{ + asm volatile( + "msr daifset, #2 // arch_local_irq_disable" + : + : + : "memory"); +} + +#define local_fiq_enable() asm("msr daifclr, #1" : : : "memory") +#define local_fiq_disable() asm("msr daifset, #1" : : : "memory") + +/* + * Save the current interrupt enable state. + */ +static inline unsigned long arch_local_save_flags(void) +{ + unsigned long flags; + asm volatile( + "mrs %0, daif // arch_local_save_flags" + : "=r" (flags) + : + : "memory"); + return flags; +} + +/* + * restore saved IRQ state + */ +static inline void arch_local_irq_restore(unsigned long flags) +{ + asm volatile( + "msr daif, %0 // arch_local_irq_restore" + : + : "r" (flags) + : "memory"); +} + +static inline int arch_irqs_disabled_flags(unsigned long flags) +{ + return flags & PSR_I_BIT; +} + +#endif +#endif |