arch/xtensa/kernel/hibernate.c

Source file repositories/reference/linux-study-clean/arch/xtensa/kernel/hibernate.c

File Facts

System
Linux kernel
Corpus path
arch/xtensa/kernel/hibernate.c
Extension
.c
Size
556 bytes
Lines
26
Domain
Architecture Layer
Bucket
arch/xtensa
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.

Dependency Surface

Detected Declarations

Annotated Snippet

// SPDX-License-Identifier: GPL-2.0-only

#include <linux/mm.h>
#include <linux/suspend.h>
#include <asm/coprocessor.h>

int pfn_is_nosave(unsigned long pfn)
{
	unsigned long nosave_begin_pfn = PFN_DOWN(__pa(&__nosave_begin));
	unsigned long nosave_end_pfn = PFN_UP(__pa(&__nosave_end));

	return	(pfn >= nosave_begin_pfn) && (pfn < nosave_end_pfn);
}

void notrace save_processor_state(void)
{
	WARN_ON(num_online_cpus() != 1);
#if XTENSA_HAVE_COPROCESSORS
	local_coprocessors_flush_release_all();
#endif
}

void notrace restore_processor_state(void)
{
}

Annotation

Implementation Notes