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/* * Xtensa IRQ flags handling functions * * This file is subject to the terms and conditions of the GNU General Public * License. See the file "COPYING" in the main directory of this archive * for more details. * * Copyright (C) 2001 - 2005 Tensilica Inc. * Copyright (C) 2015 Cadence Design Systems Inc. */ #ifndef _XTENSA_IRQFLAGS_H #define _XTENSA_IRQFLAGS_H #include <linux/types.h> static inline unsigned long arch_local_save_flags(void) { unsigned long flags; asm volatile("rsr %0, ps" : "=a" (flags)); return flags; } static inline unsigned long arch_local_irq_save(void) { unsigned long flags; #if XTENSA_FAKE_NMI #if defined(CONFIG_DEBUG_KERNEL) && (LOCKLEVEL | TOPLEVEL) >= XCHAL_DEBUGLEVEL unsigned long tmp; asm volatile("rsr %0, ps\t\n" "extui %1, %0, 0, 4\t\n" "bgei %1, "__stringify(LOCKLEVEL)", 1f\t\n" "rsil %0, "__stringify(LOCKLEVEL)"\n" "1:" : "=a" (flags), "=a" (tmp) :: "memory"); #else asm volatile("rsr %0, ps\t\n" "or %0, %0, %1\t\n" "xsr %0, ps\t\n" "rsync" : "=&a" (flags) : "a" (LOCKLEVEL) : "memory"); #endif #else asm volatile("rsil %0, "__stringify(LOCKLEVEL) : "=a" (flags) :: "memory"); #endif return flags; } static inline void arch_local_irq_disable(void) { arch_local_irq_save(); } static inline void arch_local_irq_enable(void) { unsigned long flags; asm volatile("rsil %0, 0" : "=a" (flags) :: "memory"); } static inline void arch_local_irq_restore(unsigned long flags) { asm volatile("wsr %0, ps; rsync" :: "a" (flags) : "memory"); } static inline bool arch_irqs_disabled_flags(unsigned long flags) { #if XCHAL_EXCM_LEVEL < LOCKLEVEL || (1 << PS_EXCM_BIT) < LOCKLEVEL #error "XCHAL_EXCM_LEVEL and 1<<PS_EXCM_BIT must be no less than LOCKLEVEL" #endif return (flags & (PS_INTLEVEL_MASK | (1 << PS_EXCM_BIT))) >= LOCKLEVEL; } static inline bool arch_irqs_disabled(void) { return arch_irqs_disabled_flags(arch_local_save_flags()); } #endif /* _XTENSA_IRQFLAGS_H */