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/* * Copyright (C) 2006 Atmark Techno, Inc. * * 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. */ #ifndef _ASM_MICROBLAZE_IRQFLAGS_H #define _ASM_MICROBLAZE_IRQFLAGS_H #include <linux/types.h> #include <asm/registers.h> #if CONFIG_XILINX_MICROBLAZE0_USE_MSR_INSTR static inline notrace unsigned long arch_local_irq_save(void) { unsigned long flags; asm volatile(" msrclr %0, %1 \n" " nop \n" : "=r"(flags) : "i"(MSR_IE) : "memory"); return flags; } static inline notrace void arch_local_irq_disable(void) { /* this uses r0 without declaring it - is that correct? */ asm volatile(" msrclr r0, %0 \n" " nop \n" : : "i"(MSR_IE) : "memory"); } static inline notrace void arch_local_irq_enable(void) { /* this uses r0 without declaring it - is that correct? */ asm volatile(" msrset r0, %0 \n" " nop \n" : : "i"(MSR_IE) : "memory"); } #else /* !CONFIG_XILINX_MICROBLAZE0_USE_MSR_INSTR */ static inline notrace unsigned long arch_local_irq_save(void) { unsigned long flags, tmp; asm volatile (" mfs %0, rmsr \n" " nop \n" " andi %1, %0, %2 \n" " mts rmsr, %1 \n" " nop \n" : "=r"(flags), "=r"(tmp) : "i"(~MSR_IE) : "memory"); return flags; } static inline notrace void arch_local_irq_disable(void) { unsigned long tmp; asm volatile(" mfs %0, rmsr \n" " nop \n" " andi %0, %0, %1 \n" " mts rmsr, %0 \n" " nop \n" : "=r"(tmp) : "i"(~MSR_IE) : "memory"); } static inline notrace void arch_local_irq_enable(void) { unsigned long tmp; asm volatile(" mfs %0, rmsr \n" " nop \n" " ori %0, %0, %1 \n" " mts rmsr, %0 \n" " nop \n" : "=r"(tmp) : "i"(MSR_IE) : "memory"); } #endif /* CONFIG_XILINX_MICROBLAZE0_USE_MSR_INSTR */ static inline notrace unsigned long arch_local_save_flags(void) { unsigned long flags; asm volatile(" mfs %0, rmsr \n" " nop \n" : "=r"(flags) : : "memory"); return flags; } static inline notrace void arch_local_irq_restore(unsigned long flags) { asm volatile(" mts rmsr, %0 \n" " nop \n" : : "r"(flags) : "memory"); } static inline notrace bool arch_irqs_disabled_flags(unsigned long flags) { return (flags & MSR_IE) == 0; } static inline notrace bool arch_irqs_disabled(void) { return arch_irqs_disabled_flags(arch_local_save_flags()); } #endif /* _ASM_MICROBLAZE_IRQFLAGS_H */