arch/sh/include/asm/pgalloc.h

File Facts

System

Linux kernel

Corpus path

arch/sh/include/asm/pgalloc.h

Extension

.h

Size

1079 bytes

Lines

39

Domain

Architecture Layer

Bucket

arch/sh

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.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/mm.h
• asm/page.h
• asm-generic/pgalloc.h

Detected Declarations

• function pmd_populate_kernel
• function pmd_populate

Annotated Snippet

#ifndef __ASM_SH_PGALLOC_H
#define __ASM_SH_PGALLOC_H

#include <linux/mm.h>
#include <asm/page.h>

#define __HAVE_ARCH_PMD_ALLOC_ONE
#define __HAVE_ARCH_PMD_FREE
#define __HAVE_ARCH_PGD_FREE
#include <asm-generic/pgalloc.h>

extern pgd_t *pgd_alloc(struct mm_struct *);
extern void pgd_free(struct mm_struct *mm, pgd_t *pgd);

#if PAGETABLE_LEVELS > 2
extern void pud_populate(struct mm_struct *mm, pud_t *pudp, pmd_t *pmd);
extern pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address);
extern void pmd_free(struct mm_struct *mm, pmd_t *pmd);
#define __pmd_free_tlb(tlb, pmdp, addr)		pmd_free((tlb)->mm, (pmdp))
#endif

static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd,
				       pte_t *pte)
{
	set_pmd(pmd, __pmd((unsigned long)pte));
}

static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd,
				pgtable_t pte)
{
	set_pmd(pmd, __pmd((unsigned long)page_address(pte)));
}

#define __pte_free_tlb(tlb, pte, addr)	\
	tlb_remove_ptdesc((tlb), page_ptdesc(pte))

#endif /* __ASM_SH_PGALLOC_H */

Annotation

• Immediate include surface: `linux/mm.h`, `asm/page.h`, `asm-generic/pgalloc.h`.
• Detected declarations: `function pmd_populate_kernel`, `function pmd_populate`.
• Atlas domain: Architecture Layer / arch/sh.
• 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.