arch/xtensa/include/asm/core.h

File Facts

System

Linux kernel

Corpus path

arch/xtensa/include/asm/core.h

Extension

.h

Size

1525 bytes

Lines

69

Domain

Architecture Layer

Bucket

arch/xtensa

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.

Dependency Surface

• variant/core.h

Detected Declarations

• No top-level syscall, struct, function, initcall, or export declaration detected by the generator.

Annotated Snippet

#ifndef _ASM_XTENSA_CORE_H
#define _ASM_XTENSA_CORE_H

#include <variant/core.h>

#ifndef XCHAL_HAVE_DIV32
#define XCHAL_HAVE_DIV32 0
#endif

#ifndef XCHAL_HAVE_EXCLUSIVE
#define XCHAL_HAVE_EXCLUSIVE 0
#endif

#ifndef XCHAL_HAVE_EXTERN_REGS
#define XCHAL_HAVE_EXTERN_REGS 0
#endif

#ifndef XCHAL_HAVE_MPU
#define XCHAL_HAVE_MPU 0
#endif

#ifndef XCHAL_HAVE_VECBASE
#define XCHAL_HAVE_VECBASE 0
#endif

#ifndef XCHAL_SPANNING_WAY
#define XCHAL_SPANNING_WAY 0
#endif

#ifndef XCHAL_HAVE_TRAX
#define XCHAL_HAVE_TRAX 0
#endif

#ifndef XCHAL_NUM_PERF_COUNTERS
#define XCHAL_NUM_PERF_COUNTERS 0
#endif

#if XCHAL_HAVE_WINDOWED
#if defined(CONFIG_USER_ABI_DEFAULT) || defined(CONFIG_USER_ABI_CALL0_PROBE)
/* Whether windowed ABI is supported in userspace. */
#define USER_SUPPORT_WINDOWED
#endif
#if defined(__XTENSA_WINDOWED_ABI__) || defined(USER_SUPPORT_WINDOWED)
/* Whether windowed ABI is supported either in userspace or in the kernel. */
#define SUPPORT_WINDOWED
#endif
#endif

/* Xtensa ABI requires stack alignment to be at least 16 */
#if XCHAL_DATA_WIDTH > 16
#define XTENSA_STACK_ALIGNMENT	XCHAL_DATA_WIDTH
#else
#define XTENSA_STACK_ALIGNMENT	16
#endif

#ifndef XCHAL_HW_MIN_VERSION
#if defined(XCHAL_HW_MIN_VERSION_MAJOR) && defined(XCHAL_HW_MIN_VERSION_MINOR)
#define XCHAL_HW_MIN_VERSION (XCHAL_HW_MIN_VERSION_MAJOR * 100 + \
			      XCHAL_HW_MIN_VERSION_MINOR)
#else
#define XCHAL_HW_MIN_VERSION 0
#endif
#endif

#endif

Annotation

• Immediate include surface: `variant/core.h`.
• Atlas domain: Architecture Layer / arch/xtensa.
• 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.