arch/powerpc/include/asm/nohash/32/pte-8xx.h

File Facts

System

Linux kernel

Corpus path

arch/powerpc/include/asm/nohash/32/pte-8xx.h

Extension

.h

Size

7681 bytes

Lines

242

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

Dependency Surface

• asm/pgtable-masks.h

Detected Declarations

• function protection
• function pte_read
• function pte_write
• function pte_mkwrite_novma
• function pte_mkhuge
• function ptep_set_wrprotect
• function __ptep_set_access_flags
• function __pte_leaf_size
• function ptep_is_8m_pmdp
• function number_of_cells_per_pte
• function __pte_update
• function pte_update
• function ptep_get

Annotated Snippet

if (IS_ENABLED(CONFIG_PPC_16K_PAGES)) {
			*entry++ = new;
			*entry++ = new;
			*entry++ = new;
		}
	}

	return old;
}

static inline pte_basic_t pte_update(struct mm_struct *mm, unsigned long addr, pte_t *ptep,
				     unsigned long clr, unsigned long set, int huge)
{
	pte_basic_t old;

	if (huge && ptep_is_8m_pmdp(mm, addr, ptep)) {
		pmd_t *pmdp = (pmd_t *)ptep;

		old = __pte_update(mm, addr, pte_offset_kernel(pmdp, 0), clr, set, huge);
		__pte_update(mm, addr, pte_offset_kernel(pmdp + 1, 0), clr, set, huge);
	} else {
		old = __pte_update(mm, addr, ptep, clr, set, huge);
	}
	return old;
}
#define pte_update pte_update

#ifdef CONFIG_PPC_16K_PAGES
#define ptep_get ptep_get
static inline pte_t ptep_get(pte_t *ptep)
{
	pte_basic_t val = READ_ONCE(ptep->pte);
	pte_t pte = {val, val, val, val};

	return pte;
}
#endif /* CONFIG_PPC_16K_PAGES */

#endif

#endif /* __KERNEL__ */
#endif /*  _ASM_POWERPC_NOHASH_32_PTE_8xx_H */

Annotation

• Immediate include surface: `asm/pgtable-masks.h`.
• Detected declarations: `function protection`, `function pte_read`, `function pte_write`, `function pte_mkwrite_novma`, `function pte_mkhuge`, `function ptep_set_wrprotect`, `function __ptep_set_access_flags`, `function __pte_leaf_size`, `function ptep_is_8m_pmdp`, `function number_of_cells_per_pte`.
• 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.