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68 lines
1.5 KiB
68 lines
1.5 KiB
/* SPDX-License-Identifier: GPL-2.0-or-later */ |
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/* |
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* C6X IRQ flag handling |
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* |
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* Copyright (C) 2010 Texas Instruments Incorporated |
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* Written by Mark Salter ([email protected]) |
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*/ |
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#ifndef _ASM_IRQFLAGS_H |
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#define _ASM_IRQFLAGS_H |
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#ifndef __ASSEMBLY__ |
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/* read interrupt enabled status */ |
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static inline unsigned long arch_local_save_flags(void) |
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{ |
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unsigned long flags; |
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asm volatile (" mvc .s2 CSR,%0\n" : "=b"(flags)); |
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return flags; |
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} |
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/* set interrupt enabled status */ |
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static inline void arch_local_irq_restore(unsigned long flags) |
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{ |
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asm volatile (" mvc .s2 %0,CSR\n" : : "b"(flags) : "memory"); |
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} |
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/* unconditionally enable interrupts */ |
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static inline void arch_local_irq_enable(void) |
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{ |
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unsigned long flags = arch_local_save_flags(); |
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flags |= 1; |
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arch_local_irq_restore(flags); |
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} |
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/* unconditionally disable interrupts */ |
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static inline void arch_local_irq_disable(void) |
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{ |
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unsigned long flags = arch_local_save_flags(); |
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flags &= ~1; |
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arch_local_irq_restore(flags); |
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} |
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/* get status and disable interrupts */ |
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static inline unsigned long arch_local_irq_save(void) |
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{ |
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unsigned long flags; |
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flags = arch_local_save_flags(); |
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arch_local_irq_restore(flags & ~1); |
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return flags; |
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} |
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/* test flags */ |
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static inline int arch_irqs_disabled_flags(unsigned long flags) |
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{ |
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return (flags & 1) == 0; |
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} |
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/* test hardware interrupt enable bit */ |
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static inline int 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 /* __ASSEMBLY__ */ |
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#endif /* __ASM_IRQFLAGS_H */
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