1 /* 2 * Xtensa IRQ flags handling functions 3 * 4 * This file is subject to the terms and conditions of the GNU General Public 5 * License. See the file "COPYING" in the main directory of this archive 6 * for more details. 7 * 8 * Copyright (C) 2001 - 2005 Tensilica Inc. 9 */ 10 11 #ifndef _XTENSA_IRQFLAGS_H 12 #define _XTENSA_IRQFLAGS_H 13 14 #include <linux/types.h> 15 16 static inline unsigned long arch_local_save_flags(void) 17 { 18 unsigned long flags; 19 asm volatile("rsr %0, ps" : "=a" (flags)); 20 return flags; 21 } 22 23 static inline unsigned long arch_local_irq_save(void) 24 { 25 unsigned long flags; 26 asm volatile("rsil %0, "__stringify(LOCKLEVEL) 27 : "=a" (flags) :: "memory"); 28 return flags; 29 } 30 31 static inline void arch_local_irq_disable(void) 32 { 33 arch_local_irq_save(); 34 } 35 36 static inline void arch_local_irq_enable(void) 37 { 38 unsigned long flags; 39 asm volatile("rsil %0, 0" : "=a" (flags) :: "memory"); 40 } 41 42 static inline void arch_local_irq_restore(unsigned long flags) 43 { 44 asm volatile("wsr %0, ps; rsync" 45 :: "a" (flags) : "memory"); 46 } 47 48 static inline bool arch_irqs_disabled_flags(unsigned long flags) 49 { 50 #if XCHAL_EXCM_LEVEL < LOCKLEVEL || (1 << PS_EXCM_BIT) < LOCKLEVEL 51 #error "XCHAL_EXCM_LEVEL and 1<<PS_EXCM_BIT must be no less than LOCKLEVEL" 52 #endif 53 return (flags & (PS_INTLEVEL_MASK | (1 << PS_EXCM_BIT))) >= LOCKLEVEL; 54 } 55 56 static inline bool arch_irqs_disabled(void) 57 { 58 return arch_irqs_disabled_flags(arch_local_save_flags()); 59 } 60 61 #endif /* _XTENSA_IRQFLAGS_H */ 62