arch/m68k/include/asm/mcf_pgtable.h

File Facts

System

Linux kernel

Corpus path

arch/m68k/include/asm/mcf_pgtable.h

Extension

.h

Size

7194 bytes

Lines

297

Domain

Architecture Layer

Bucket

arch/m68k

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

• asm/mcfmmu.h
• asm/page.h

Detected Declarations

• function pte_modify
• function pgd_set
• function pte_none
• function pte_present
• function pte_clear
• function pmd_none2
• function pmd_bad2
• function pmd_clear
• function pte_present
• function pte_write
• function pte_exec
• function pte_dirty
• function pte_young
• function pte_wrprotect
• function pte_rdprotect
• function pte_exprotect
• function pte_mkclean
• function pte_mkold
• function pte_mkwrite_novma
• function pte_mkread
• function pte_mkexec
• function pte_mkdirty
• function pte_mkyoung
• function pte_mknocache
• function pte_mkcache
• function pte_swp_exclusive
• function pte_swp_mkexclusive
• function pte_swp_clear_exclusive

Annotated Snippet

static inline int pmd_none2(pmd_t *pmd) { return !pmd_val(*pmd); }
#define pmd_none(pmd) pmd_none2(&(pmd))
static inline int pmd_bad2(pmd_t *pmd) { return 0; }
#define pmd_bad(pmd) pmd_bad2(&(pmd))
#define pmd_present(pmd) (!pmd_none2(&(pmd)))
static inline void pmd_clear(pmd_t *pmdp) { pmd_val(*pmdp) = 0; }

#define pte_ERROR(e) \
	printk(KERN_ERR "%s:%d: bad pte %08lx.\n",	\
	__FILE__, __LINE__, pte_val(e))
#define pgd_ERROR(e) \
	printk(KERN_ERR "%s:%d: bad pgd %08lx.\n",	\
	__FILE__, __LINE__, pgd_val(e))

/*
 * The following only work if pte_present() is true.
 * Undefined behaviour if not...
 * [we have the full set here even if they don't change from m68k]
 */
static inline int pte_read(pte_t pte)
{
	return pte_val(pte) & CF_PAGE_READABLE;
}

static inline int pte_write(pte_t pte)
{
	return pte_val(pte) & CF_PAGE_WRITABLE;
}

static inline int pte_exec(pte_t pte)
{
	return pte_val(pte) & CF_PAGE_EXEC;
}

static inline int pte_dirty(pte_t pte)
{
	return pte_val(pte) & CF_PAGE_DIRTY;
}

static inline int pte_young(pte_t pte)
{
	return pte_val(pte) & CF_PAGE_ACCESSED;
}

static inline pte_t pte_wrprotect(pte_t pte)
{
	pte_val(pte) &= ~CF_PAGE_WRITABLE;
	return pte;
}

static inline pte_t pte_rdprotect(pte_t pte)
{
	pte_val(pte) &= ~CF_PAGE_READABLE;
	return pte;
}

static inline pte_t pte_exprotect(pte_t pte)
{
	pte_val(pte) &= ~CF_PAGE_EXEC;
	return pte;
}

static inline pte_t pte_mkclean(pte_t pte)
{
	pte_val(pte) &= ~CF_PAGE_DIRTY;
	return pte;
}

static inline pte_t pte_mkold(pte_t pte)
{
	pte_val(pte) &= ~CF_PAGE_ACCESSED;
	return pte;
}

static inline pte_t pte_mkwrite_novma(pte_t pte)
{
	pte_val(pte) |= CF_PAGE_WRITABLE;
	return pte;
}

static inline pte_t pte_mkread(pte_t pte)
{
	pte_val(pte) |= CF_PAGE_READABLE;
	return pte;
}

static inline pte_t pte_mkexec(pte_t pte)
{
	pte_val(pte) |= CF_PAGE_EXEC;
	return pte;

Annotation

• Immediate include surface: `asm/mcfmmu.h`, `asm/page.h`.
• Detected declarations: `function pte_modify`, `function pgd_set`, `function pte_none`, `function pte_present`, `function pte_clear`, `function pmd_none2`, `function pmd_bad2`, `function pmd_clear`, `function pte_present`, `function pte_write`.
• Atlas domain: Architecture Layer / arch/m68k.
• 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.