arch/sparc/include/asm/mmu_context_64.h

File Facts

System

Linux kernel

Corpus path

arch/sparc/include/asm/mmu_context_64.h

Extension

.h

Size

5621 bytes

Lines

199

Domain

Architecture Layer

Bucket

arch/sparc

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.
• Uses kernel synchronization; read lock ordering, sleepability, and interrupt context assumptions before translating.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/spinlock.h
• linux/mm_types.h
• linux/smp.h
• linux/sched.h
• asm/spitfire.h
• asm/adi_64.h
• asm-generic/mm_hooks.h
• asm/percpu.h
• asm-generic/mmu_context.h

Detected Declarations

• function tsb_context_switch_ctx
• function switch_mm
• function arch_start_context_switch
• function finish_arch_post_lock_switch
• function mm_untag_mask

Annotated Snippet

if (current && current->mm && current->mm->context.adi) {
			struct pt_regs *regs;

			regs = task_pt_regs(current);
			regs->tstate |= TSTATE_MCDE;
		}
	}
}

#define mm_untag_mask mm_untag_mask
static inline unsigned long mm_untag_mask(struct mm_struct *mm)
{
       return -1UL >> adi_nbits();
}

#include <asm-generic/mmu_context.h>

#endif /* !(__ASSEMBLER__) */

#endif /* !(__SPARC64_MMU_CONTEXT_H) */

Annotation

• Immediate include surface: `linux/spinlock.h`, `linux/mm_types.h`, `linux/smp.h`, `linux/sched.h`, `asm/spitfire.h`, `asm/adi_64.h`, `asm-generic/mm_hooks.h`, `asm/percpu.h`.
• Detected declarations: `function tsb_context_switch_ctx`, `function switch_mm`, `function arch_start_context_switch`, `function finish_arch_post_lock_switch`, `function mm_untag_mask`.
• Atlas domain: Architecture Layer / arch/sparc.
• Implementation status: source implementation candidate.
• Synchronization appears in or near this file; preserve lock ordering, sleepability, and interrupt-context constraints.

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.