arch/nios2/include/asm/irqflags.h
Source file repositories/reference/linux-study-clean/arch/nios2/include/asm/irqflags.h
File Facts
- System
- Linux kernel
- Corpus path
arch/nios2/include/asm/irqflags.h- Extension
.h- Size
- 1193 bytes
- Lines
- 60
- Domain
- Architecture Layer
- Bucket
- arch/nios2
- Inferred role
- Architecture Layer: implementation source
- Status
- source implementation candidate
Why This File Exists
CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.
- CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.
Dependency Surface
asm/registers.h
Detected Declarations
function Copyrightfunction arch_local_irq_restorefunction arch_local_irq_disablefunction arch_local_irq_enablefunction arch_irqs_disabled_flagsfunction arch_irqs_disabledfunction arch_local_irq_save
Annotated Snippet
#ifndef _ASM_IRQFLAGS_H
#define _ASM_IRQFLAGS_H
#include <asm/registers.h>
static inline unsigned long arch_local_save_flags(void)
{
return RDCTL(CTL_FSTATUS);
}
/*
* This will restore ALL status register flags, not only the interrupt
* mask flag.
*/
static inline void arch_local_irq_restore(unsigned long flags)
{
WRCTL(CTL_FSTATUS, flags);
}
static inline void arch_local_irq_disable(void)
{
unsigned long flags;
flags = arch_local_save_flags();
arch_local_irq_restore(flags & ~STATUS_PIE);
}
static inline void arch_local_irq_enable(void)
{
unsigned long flags;
flags = arch_local_save_flags();
arch_local_irq_restore(flags | STATUS_PIE);
}
static inline int arch_irqs_disabled_flags(unsigned long flags)
{
return (flags & STATUS_PIE) == 0;
}
static inline int arch_irqs_disabled(void)
{
return arch_irqs_disabled_flags(arch_local_save_flags());
}
static inline unsigned long arch_local_irq_save(void)
{
unsigned long flags;
flags = arch_local_save_flags();
arch_local_irq_restore(flags & ~STATUS_PIE);
return flags;
}
#endif /* _ASM_IRQFLAGS_H */
Annotation
- Immediate include surface: `asm/registers.h`.
- Detected declarations: `function Copyright`, `function arch_local_irq_restore`, `function arch_local_irq_disable`, `function arch_local_irq_enable`, `function arch_irqs_disabled_flags`, `function arch_irqs_disabled`, `function arch_local_irq_save`.
- Atlas domain: Architecture Layer / arch/nios2.
- Implementation status: source implementation candidate.
Implementation Notes
- This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
- Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
- Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.