arch/arm/include/asm/tcm.h

File Facts

System

Linux kernel

Corpus path

arch/arm/include/asm/tcm.h

Extension

.h

Size

991 bytes

Lines

38

Domain

Architecture Layer

Bucket

arch/arm

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

• linux/compiler.h

Detected Declarations

• function tcm_init

Annotated Snippet

#ifndef __ASMARM_TCM_H
#define __ASMARM_TCM_H

#ifdef CONFIG_HAVE_TCM

#include <linux/compiler.h>

/* Tag variables with this */
#define __tcmdata __section(".tcm.data")
/* Tag constants with this */
#define __tcmconst __section(".tcm.rodata")
/* Tag functions inside TCM called from outside TCM with this */
#define __tcmfunc __attribute__((long_call)) __section(".tcm.text") noinline
/* Tag function inside TCM called from inside TCM  with this */
#define __tcmlocalfunc __section(".tcm.text")

void *tcm_alloc(size_t len);
void tcm_free(void *addr, size_t len);
bool tcm_dtcm_present(void);
bool tcm_itcm_present(void);

void __init tcm_init(void);
#else
/* No TCM support, just blank inlines to be optimized out */
static inline void tcm_init(void)
{
}
#endif
#endif

Annotation

• Immediate include surface: `linux/compiler.h`.
• Detected declarations: `function tcm_init`.
• Atlas domain: Architecture Layer / arch/arm.
• 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.