arch/powerpc/include/asm/book3s/64/slice.h

File Facts

System

Linux kernel

Corpus path

arch/powerpc/include/asm/book3s/64/slice.h

Extension

.h

Size

1251 bytes

Lines

43

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

• No C-style include directives detected by the generator.

Detected Declarations

• struct mm_struct

Annotated Snippet

#ifndef _ASM_POWERPC_BOOK3S_64_SLICE_H
#define _ASM_POWERPC_BOOK3S_64_SLICE_H

#ifndef __ASSEMBLER__

#ifdef CONFIG_PPC_64S_HASH_MMU
#ifdef CONFIG_HUGETLB_PAGE
#define HAVE_ARCH_HUGETLB_UNMAPPED_AREA
#endif
#define HAVE_ARCH_UNMAPPED_AREA
#define HAVE_ARCH_UNMAPPED_AREA_TOPDOWN
#endif

#define SLICE_LOW_SHIFT		28
#define SLICE_LOW_TOP		(0x100000000ul)
#define SLICE_NUM_LOW		(SLICE_LOW_TOP >> SLICE_LOW_SHIFT)
#define GET_LOW_SLICE_INDEX(addr)	((addr) >> SLICE_LOW_SHIFT)

#define SLICE_HIGH_SHIFT	40
#define SLICE_NUM_HIGH		(H_PGTABLE_RANGE >> SLICE_HIGH_SHIFT)
#define GET_HIGH_SLICE_INDEX(addr)	((addr) >> SLICE_HIGH_SHIFT)

#define SLB_ADDR_LIMIT_DEFAULT	DEFAULT_MAP_WINDOW_USER64

struct mm_struct;

unsigned long slice_get_unmapped_area(unsigned long addr, unsigned long len,
				      unsigned long flags, unsigned int psize,
				      int topdown);

unsigned int get_slice_psize(struct mm_struct *mm, unsigned long addr);

void slice_set_range_psize(struct mm_struct *mm, unsigned long start,
			   unsigned long len, unsigned int psize);

void slice_init_new_context_exec(struct mm_struct *mm);
void slice_setup_new_exec(void);

#endif /* __ASSEMBLER__ */

#endif /* _ASM_POWERPC_BOOK3S_64_SLICE_H */

Annotation

• Detected declarations: `struct mm_struct`.
• 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.