diff options
Diffstat (limited to 'arch/c6x/include/asm/irqflags.h')
-rw-r--r-- | arch/c6x/include/asm/irqflags.h | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/arch/c6x/include/asm/irqflags.h b/arch/c6x/include/asm/irqflags.h new file mode 100644 index 00000000..cf78e09e --- /dev/null +++ b/arch/c6x/include/asm/irqflags.h @@ -0,0 +1,72 @@ +/* + * C6X IRQ flag handling + * + * Copyright (C) 2010 Texas Instruments Incorporated + * Written by Mark Salter (msalter@redhat.com) + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public Licence + * as published by the Free Software Foundation; either version + * 2 of the Licence, or (at your option) any later version. + */ + +#ifndef _ASM_IRQFLAGS_H +#define _ASM_IRQFLAGS_H + +#ifndef __ASSEMBLY__ + +/* read interrupt enabled status */ +static inline unsigned long arch_local_save_flags(void) +{ + unsigned long flags; + + asm volatile (" mvc .s2 CSR,%0\n" : "=b"(flags)); + return flags; +} + +/* set interrupt enabled status */ +static inline void arch_local_irq_restore(unsigned long flags) +{ + asm volatile (" mvc .s2 %0,CSR\n" : : "b"(flags)); +} + +/* unconditionally enable interrupts */ +static inline void arch_local_irq_enable(void) +{ + unsigned long flags = arch_local_save_flags(); + flags |= 1; + arch_local_irq_restore(flags); +} + +/* unconditionally disable interrupts */ +static inline void arch_local_irq_disable(void) +{ + unsigned long flags = arch_local_save_flags(); + flags &= ~1; + arch_local_irq_restore(flags); +} + +/* get status and disable interrupts */ +static inline unsigned long arch_local_irq_save(void) +{ + unsigned long flags; + + flags = arch_local_save_flags(); + arch_local_irq_restore(flags & ~1); + return flags; +} + +/* test flags */ +static inline int arch_irqs_disabled_flags(unsigned long flags) +{ + return (flags & 1) == 0; +} + +/* test hardware interrupt enable bit */ +static inline int arch_irqs_disabled(void) +{ + return arch_irqs_disabled_flags(arch_local_save_flags()); +} + +#endif /* __ASSEMBLY__ */ +#endif /* __ASM_IRQFLAGS_H */ |