arch/arm/include/debug/meson.S

File Facts

System

Linux kernel

Corpus path

arch/arm/include/debug/meson.S

Extension

.S

Size

771 bytes

Lines

36

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 MESON_AO_UART_WFIFO		0x0
#define MESON_AO_UART_STATUS		0xc

#define MESON_AO_UART_TX_FIFO_EMPTY	(1 << 22)
#define MESON_AO_UART_TX_FIFO_FULL	(1 << 21)

	.macro	addruart, rp, rv, tmp
	ldr	\rp, =(CONFIG_DEBUG_UART_PHYS)		@ physical
	ldr	\rv, =(CONFIG_DEBUG_UART_VIRT)		@ virtual
	.endm

	.macro	senduart,rd,rx
	str	\rd, [\rx, #MESON_AO_UART_WFIFO]
	.endm

	.macro	busyuart,rd,rx
1002:	ldr	\rd, [\rx, #MESON_AO_UART_STATUS]
	tst	\rd, #MESON_AO_UART_TX_FIFO_EMPTY
	beq	1002b
	.endm

	.macro	waituartcts,rd,rx
	.endm

	.macro	waituarttxrdy,rd,rx
1001:	ldr	\rd, [\rx, #MESON_AO_UART_STATUS]
	tst	\rd, #MESON_AO_UART_TX_FIFO_FULL
	bne	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.