arch/powerpc/include/asm/book3s/64/kexec.h

File Facts

System

Linux kernel

Corpus path

arch/powerpc/include/asm/book3s/64/kexec.h

Extension

.h

Size

653 bytes

Lines

34

Domain

Architecture Layer

Bucket

arch/powerpc

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/plpar_wrappers.h

Detected Declarations

• function reset_sprs

Annotated Snippet

#ifndef _ASM_POWERPC_BOOK3S_64_KEXEC_H_
#define _ASM_POWERPC_BOOK3S_64_KEXEC_H_

#include <asm/plpar_wrappers.h>

#define reset_sprs reset_sprs
static inline void reset_sprs(void)
{
	if (cpu_has_feature(CPU_FTR_ARCH_206)) {
		mtspr(SPRN_AMR, 0);
		mtspr(SPRN_UAMOR, 0);
	}

	if (cpu_has_feature(CPU_FTR_ARCH_207S)) {
		mtspr(SPRN_IAMR, 0);
		if (cpu_has_feature(CPU_FTR_HVMODE))
			mtspr(SPRN_CIABR, 0);
		else
			plpar_set_ciabr(0);
	}

	if (cpu_has_feature(CPU_FTR_ARCH_31)) {
		mtspr(SPRN_DEXCR, 0);
		mtspr(SPRN_HASHKEYR, 0);
	}

	/*  Do we need isync()? We are going via a kexec reset */
	isync();
}

#endif

Annotation

• Immediate include surface: `asm/plpar_wrappers.h`.
• Detected declarations: `function reset_sprs`.
• Atlas domain: Architecture Layer / arch/powerpc.
• 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.