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author | Ley Foon Tan <lftan@altera.com> | 2014-11-06 15:19:52 +0800 |
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committer | Ley Foon Tan <lftan@altera.com> | 2014-12-08 12:55:55 +0800 |
commit | f27ffc751ca5d216a347084996c70452a4e185a4 (patch) | |
tree | 11ba83ebdd3837f00a2ebfca4d7528aa75f80793 /arch/nios2/include | |
parent | c983e92fcba7c7e54c796941f42514d94dd6cccc (diff) | |
download | linux-f27ffc751ca5d216a347084996c70452a4e185a4.tar.gz linux-f27ffc751ca5d216a347084996c70452a4e185a4.tar.bz2 linux-f27ffc751ca5d216a347084996c70452a4e185a4.zip |
nios2: Interrupt handling
This patch adds the support for IRQ handling.
Signed-off-by: Ley Foon Tan <lftan@altera.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'arch/nios2/include')
-rw-r--r-- | arch/nios2/include/asm/irq.h | 28 | ||||
-rw-r--r-- | arch/nios2/include/asm/irqflags.h | 72 |
2 files changed, 100 insertions, 0 deletions
diff --git a/arch/nios2/include/asm/irq.h b/arch/nios2/include/asm/irq.h new file mode 100644 index 000000000000..8e40fd94a36c --- /dev/null +++ b/arch/nios2/include/asm/irq.h @@ -0,0 +1,28 @@ +/* + * Copyright (C) 2013 Altera Corporation + * Copyright (C) 2011 Tobias Klauser <tklauser@distanz.ch> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * 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_NIOS2_IRQ_H +#define _ASM_NIOS2_IRQ_H + +#define NIOS2_CPU_NR_IRQS 32 + +#include <asm-generic/irq.h> +#include <linux/irqdomain.h> + +#endif diff --git a/arch/nios2/include/asm/irqflags.h b/arch/nios2/include/asm/irqflags.h new file mode 100644 index 000000000000..75ab92e639f8 --- /dev/null +++ b/arch/nios2/include/asm/irqflags.h @@ -0,0 +1,72 @@ +/* + * Copyright (C) 2010 Thomas Chou <thomas@wytron.com.tw> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * 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 + +#include <asm/registers.h> + +static inline unsigned long arch_local_save_flags(void) +{ + return RDCTL(CTL_STATUS); +} + +/* + * This will restore ALL status register flags, not only the interrupt + * mask flag. + */ +static inline void arch_local_irq_restore(unsigned long flags) +{ + WRCTL(CTL_STATUS, flags); +} + +static inline void arch_local_irq_disable(void) +{ + unsigned long flags; + + flags = arch_local_save_flags(); + arch_local_irq_restore(flags & ~STATUS_PIE); +} + +static inline void arch_local_irq_enable(void) +{ + unsigned long flags; + + flags = arch_local_save_flags(); + arch_local_irq_restore(flags | STATUS_PIE); +} + +static inline int arch_irqs_disabled_flags(unsigned long flags) +{ + return (flags & STATUS_PIE) == 0; +} + +static inline int arch_irqs_disabled(void) +{ + return arch_irqs_disabled_flags(arch_local_save_flags()); +} + +static inline unsigned long arch_local_irq_save(void) +{ + unsigned long flags; + + flags = arch_local_save_flags(); + arch_local_irq_restore(flags & ~STATUS_PIE); + return flags; +} + +#endif /* _ASM_IRQFLAGS_H */ |