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119 lines
2.5 KiB
119 lines
2.5 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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/* |
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* Copyright (C) 2006 Atmark Techno, Inc. |
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*/ |
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#ifndef _ASM_MICROBLAZE_IRQFLAGS_H |
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#define _ASM_MICROBLAZE_IRQFLAGS_H |
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#include <linux/types.h> |
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#include <asm/registers.h> |
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#if CONFIG_XILINX_MICROBLAZE0_USE_MSR_INSTR |
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static inline notrace unsigned long arch_local_irq_save(void) |
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{ |
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unsigned long flags; |
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asm volatile(" msrclr %0, %1 \n" |
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" nop \n" |
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: "=r"(flags) |
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: "i"(MSR_IE) |
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: "memory"); |
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return flags; |
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} |
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static inline notrace void arch_local_irq_disable(void) |
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{ |
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/* this uses r0 without declaring it - is that correct? */ |
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asm volatile(" msrclr r0, %0 \n" |
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" nop \n" |
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: |
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: "i"(MSR_IE) |
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: "memory"); |
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} |
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static inline notrace void arch_local_irq_enable(void) |
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{ |
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/* this uses r0 without declaring it - is that correct? */ |
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asm volatile(" msrset r0, %0 \n" |
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" nop \n" |
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: |
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: "i"(MSR_IE) |
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: "memory"); |
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} |
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#else /* !CONFIG_XILINX_MICROBLAZE0_USE_MSR_INSTR */ |
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static inline notrace unsigned long arch_local_irq_save(void) |
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{ |
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unsigned long flags, tmp; |
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asm volatile (" mfs %0, rmsr \n" |
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" nop \n" |
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" andi %1, %0, %2 \n" |
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" mts rmsr, %1 \n" |
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" nop \n" |
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: "=r"(flags), "=r"(tmp) |
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: "i"(~MSR_IE) |
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: "memory"); |
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return flags; |
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} |
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static inline notrace void arch_local_irq_disable(void) |
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{ |
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unsigned long tmp; |
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asm volatile(" mfs %0, rmsr \n" |
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" nop \n" |
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" andi %0, %0, %1 \n" |
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" mts rmsr, %0 \n" |
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" nop \n" |
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: "=r"(tmp) |
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: "i"(~MSR_IE) |
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: "memory"); |
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} |
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static inline notrace void arch_local_irq_enable(void) |
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{ |
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unsigned long tmp; |
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asm volatile(" mfs %0, rmsr \n" |
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" nop \n" |
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" ori %0, %0, %1 \n" |
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" mts rmsr, %0 \n" |
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" nop \n" |
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: "=r"(tmp) |
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: "i"(MSR_IE) |
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: "memory"); |
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} |
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#endif /* CONFIG_XILINX_MICROBLAZE0_USE_MSR_INSTR */ |
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static inline notrace unsigned long arch_local_save_flags(void) |
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{ |
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unsigned long flags; |
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asm volatile(" mfs %0, rmsr \n" |
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" nop \n" |
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: "=r"(flags) |
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: |
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: "memory"); |
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return flags; |
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} |
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static inline notrace void arch_local_irq_restore(unsigned long flags) |
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{ |
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asm volatile(" mts rmsr, %0 \n" |
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" nop \n" |
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: |
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: "r"(flags) |
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: "memory"); |
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} |
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static inline notrace bool arch_irqs_disabled_flags(unsigned long flags) |
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{ |
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return (flags & MSR_IE) == 0; |
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} |
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static inline notrace bool arch_irqs_disabled(void) |
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{ |
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return arch_irqs_disabled_flags(arch_local_save_flags()); |
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} |
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#endif /* _ASM_MICROBLAZE_IRQFLAGS_H */
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