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 */ arch_local_save_flags(void)19static 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 */ arch_local_irq_restore(unsigned long flags)28static inline void arch_local_irq_restore(unsigned long flags) 29 { 30 asm volatile (" mvc .s2 %0,CSR\n" : : "b"(flags) : "memory"); 31 } 32 33 /* unconditionally enable interrupts */ arch_local_irq_enable(void)34static 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 */ arch_local_irq_disable(void)42static 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 */ arch_local_irq_save(void)50static 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 */ arch_irqs_disabled_flags(unsigned long flags)60static inline int arch_irqs_disabled_flags(unsigned long flags) 61 { 62 return (flags & 1) == 0; 63 } 64 65 /* test hardware interrupt enable bit */ arch_irqs_disabled(void)66static 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 */ 73