| Aurelien Jacquiot | ec500af | 2011-10-04 11:06:27 -0400 | [diff] [blame] | 1 | /* |
| 2 | * C6X IRQ flag handling |
| 3 | * |
| 4 | * Copyright (C) 2010 Texas Instruments Incorporated |
| 5 | * Written by Mark Salter (msalter@redhat.com) |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or |
| 8 | * modify it under the terms of the GNU General Public Licence |
| 9 | * as published by the Free Software Foundation; either version |
| 10 | * 2 of the Licence, or (at your option) any later version. |
| 11 | */ |
| 12 | |
| 13 | #ifndef _ASM_IRQFLAGS_H |
| 14 | #define _ASM_IRQFLAGS_H |
| 15 | |
| 16 | #ifndef __ASSEMBLY__ |
| 17 | |
| 18 | /* read interrupt enabled status */ |
| 19 | static inline unsigned long arch_local_save_flags(void) |
| 20 | { |
| 21 | unsigned long flags; |
| 22 | |
| 23 | asm volatile (" mvc .s2 CSR,%0\n" : "=b"(flags)); |
| 24 | return flags; |
| 25 | } |
| 26 | |
| 27 | /* set interrupt enabled status */ |
| 28 | static inline void arch_local_irq_restore(unsigned long flags) |
| 29 | { |
| 30 | asm volatile (" mvc .s2 %0,CSR\n" : : "b"(flags)); |
| 31 | } |
| 32 | |
| 33 | /* unconditionally enable interrupts */ |
| 34 | static inline void arch_local_irq_enable(void) |
| 35 | { |
| 36 | unsigned long flags = arch_local_save_flags(); |
| 37 | flags |= 1; |
| 38 | arch_local_irq_restore(flags); |
| 39 | } |
| 40 | |
| 41 | /* unconditionally disable interrupts */ |
| 42 | static inline void arch_local_irq_disable(void) |
| 43 | { |
| 44 | unsigned long flags = arch_local_save_flags(); |
| 45 | flags &= ~1; |
| 46 | arch_local_irq_restore(flags); |
| 47 | } |
| 48 | |
| 49 | /* get status and disable interrupts */ |
| 50 | static inline unsigned long arch_local_irq_save(void) |
| 51 | { |
| 52 | unsigned long flags; |
| 53 | |
| 54 | flags = arch_local_save_flags(); |
| 55 | arch_local_irq_restore(flags & ~1); |
| 56 | return flags; |
| 57 | } |
| 58 | |
| 59 | /* test flags */ |
| 60 | static inline int arch_irqs_disabled_flags(unsigned long flags) |
| 61 | { |
| 62 | return (flags & 1) == 0; |
| 63 | } |
| 64 | |
| 65 | /* test hardware interrupt enable bit */ |
| 66 | static inline int arch_irqs_disabled(void) |
| 67 | { |
| 68 | return arch_irqs_disabled_flags(arch_local_save_flags()); |
| 69 | } |
| 70 | |
| 71 | #endif /* __ASSEMBLY__ */ |
| 72 | #endif /* __ASM_IRQFLAGS_H */ |