arch/arm/include/debug/digicolor.S

File Facts

System

Linux kernel

Corpus path

arch/arm/include/debug/digicolor.S

Extension

.S

Size

648 bytes

Lines

35

Domain

Architecture Layer

Bucket

arch/arm

Inferred role

Architecture Layer: arch/arm

Status

atlas-only

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

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

Detected Declarations

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

Annotated Snippet

#define UA0_STATUS	0x0742
#define UA0_EMI_REC	0x0744

#define UA0_STATUS_TX_READY	0x40

#ifdef CONFIG_DEBUG_UART_PHYS
		.macro	addruart, rp, rv, tmp
		ldr	\rp, =CONFIG_DEBUG_UART_PHYS
		ldr	\rv, =CONFIG_DEBUG_UART_VIRT
		.endm
#endif

		.macro	senduart,rd,rx
		strb	\rd, [\rx, #UA0_EMI_REC]
		.endm

		.macro	waituartcts,rd,rx
		.endm

		.macro	waituarttxrdy,rd,rx
		.endm

	.macro	busyuart,rd,rx
1001:		ldrb	\rd, [\rx, #UA0_STATUS]
		tst	\rd, #UA0_STATUS_TX_READY
		beq	1001b
		.endm

Annotation

• Atlas domain: Architecture Layer / arch/arm.
• Implementation status: atlas-only.

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.