arch/loongarch/include/asm/irqflags.h
Source file repositories/reference/linux-study-clean/arch/loongarch/include/asm/irqflags.h
File Facts
- System
- Linux kernel
- Corpus path
arch/loongarch/include/asm/irqflags.h- Extension
.h- Size
- 1861 bytes
- Lines
- 86
- Domain
- Architecture Layer
- Bucket
- arch/loongarch
- 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
linux/compiler.hlinux/stringify.hasm/loongarch.h
Detected Declarations
function Copyrightfunction arch_local_irq_disablefunction arch_local_irq_savefunction arch_local_irq_restorefunction arch_local_save_flagsfunction arch_irqs_disabled_flagsfunction arch_irqs_disabled
Annotated Snippet
#ifndef _ASM_IRQFLAGS_H
#define _ASM_IRQFLAGS_H
#ifndef __ASSEMBLER__
#include <linux/compiler.h>
#include <linux/stringify.h>
#include <asm/loongarch.h>
static inline void arch_local_irq_enable(void)
{
u32 flags = CSR_CRMD_IE;
register u32 mask asm("t0") = CSR_CRMD_IE;
__asm__ __volatile__(
"csrxchg %[val], %[mask], %[reg]\n\t"
: [val] "+r" (flags)
: [mask] "r" (mask), [reg] "i" (LOONGARCH_CSR_CRMD)
: "memory");
}
static inline void arch_local_irq_disable(void)
{
u32 flags = 0;
register u32 mask asm("t0") = CSR_CRMD_IE;
__asm__ __volatile__(
"csrxchg %[val], %[mask], %[reg]\n\t"
: [val] "+r" (flags)
: [mask] "r" (mask), [reg] "i" (LOONGARCH_CSR_CRMD)
: "memory");
}
static inline unsigned long arch_local_irq_save(void)
{
u32 flags = 0;
register u32 mask asm("t0") = CSR_CRMD_IE;
__asm__ __volatile__(
"csrxchg %[val], %[mask], %[reg]\n\t"
: [val] "+r" (flags)
: [mask] "r" (mask), [reg] "i" (LOONGARCH_CSR_CRMD)
: "memory");
return flags;
}
static inline void arch_local_irq_restore(unsigned long flags)
{
register u32 mask asm("t0") = CSR_CRMD_IE;
__asm__ __volatile__(
"csrxchg %[val], %[mask], %[reg]\n\t"
: [val] "+r" (flags)
: [mask] "r" (mask), [reg] "i" (LOONGARCH_CSR_CRMD)
: "memory");
}
static inline unsigned long arch_local_save_flags(void)
{
u32 flags;
__asm__ __volatile__(
"csrrd %[val], %[reg]\n\t"
: [val] "=r" (flags)
: [reg] "i" (LOONGARCH_CSR_CRMD)
: "memory");
return flags;
}
static inline int arch_irqs_disabled_flags(unsigned long flags)
{
return !(flags & CSR_CRMD_IE);
}
static inline int arch_irqs_disabled(void)
{
return arch_irqs_disabled_flags(arch_local_save_flags());
}
#endif /* #ifndef __ASSEMBLER__ */
#endif /* _ASM_IRQFLAGS_H */
Annotation
- Immediate include surface: `linux/compiler.h`, `linux/stringify.h`, `asm/loongarch.h`.
- Detected declarations: `function Copyright`, `function arch_local_irq_disable`, `function arch_local_irq_save`, `function arch_local_irq_restore`, `function arch_local_save_flags`, `function arch_irqs_disabled_flags`, `function arch_irqs_disabled`.
- Atlas domain: Architecture Layer / arch/loongarch.
- 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.