arch/sh/boards/mach-hp6xx/pm_wakeup.S

File Facts

System

Linux kernel

Corpus path

arch/sh/boards/mach-hp6xx/pm_wakeup.S

Extension

.S

Size

596 bytes

Lines

40

Domain

Architecture Layer

Bucket

arch/sh

Inferred role

Architecture Layer: arch/sh

Status

atlas-only

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/linkage.h
• cpu/mmu_context.h

Detected Declarations

• No top-level syscall, struct, function, initcall, or export declaration detected by the generator.

Annotated Snippet

#include <linux/linkage.h>
#include <cpu/mmu_context.h>

/*
 * Kernel mode register usage:
 *	k0	scratch
 *	k1	scratch
 * For more details, please have a look at entry.S
 */

#define k0	r0
#define k1	r1

ENTRY(wakeup_start)
! clear STBY bit
	mov	#-126, k1
   	and	#127, k0
	mov.b	k0, @k1
! enable refresh
	mov.l	5f, k1
	mov.w	6f, k0
  	mov.w	k0, @k1
! jump to handler
	mov.l	4f, k1
	jmp	@k1
	 nop

	.align	2
4:	.long	handle_interrupt
5:	.long	0xffffff68
6:	.word	0x0524

ENTRY(wakeup_end)
	nop

Annotation

• Immediate include surface: `linux/linkage.h`, `cpu/mmu_context.h`.
• Atlas domain: Architecture Layer / arch/sh.
• Implementation status: atlas-only.

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.