arch/arm/include/debug/samsung.S

Source file repositories/reference/linux-study-clean/arch/arm/include/debug/samsung.S

File Facts

System
Linux kernel
Corpus path
arch/arm/include/debug/samsung.S
Extension
.S
Size
1903 bytes
Lines
95
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.

Dependency Surface

Detected Declarations

Annotated Snippet

#include <linux/serial_s3c.h>

/* The S5PV210/S5PC110 implementations are as belows. */

	.macro fifo_level_s5pv210 rd, rx
		ldr	\rd, [\rx, # S3C2410_UFSTAT]
ARM_BE8(rev \rd, \rd)
		and	\rd, \rd, #S5PV210_UFSTAT_TXMASK
	.endm

	.macro  fifo_full_s5pv210 rd, rx
		ldr	\rd, [\rx, # S3C2410_UFSTAT]
ARM_BE8(rev \rd, \rd)
		tst	\rd, #S5PV210_UFSTAT_TXFULL
	.endm

/* The S3C2440 implementations are used by default as they are the
 * most widely re-used */

	.macro fifo_level_s3c2440 rd, rx
		ldr	\rd, [\rx, # S3C2410_UFSTAT]
ARM_BE8(rev \rd, \rd)
		and	\rd, \rd, #S3C2440_UFSTAT_TXMASK
	.endm

#ifndef fifo_level
#define fifo_level fifo_level_s3c2440
#endif

	.macro  fifo_full_s3c2440 rd, rx
		ldr	\rd, [\rx, # S3C2410_UFSTAT]
ARM_BE8(rev \rd, \rd)
		tst	\rd, #S3C2440_UFSTAT_TXFULL
	.endm

#ifndef fifo_full
#define fifo_full fifo_full_s3c2440
#endif

	.macro	senduart,rd,rx
		strb 	\rd, [\rx, # S3C2410_UTXH]
	.endm

	.macro	busyuart, rd, rx
		ldr	\rd, [\rx, # S3C2410_UFCON]
ARM_BE8(rev \rd, \rd)
		tst	\rd, #S3C2410_UFCON_FIFOMODE	@ fifo enabled?
		beq	1001f				@
		@ FIFO enabled...
1003:
		fifo_full \rd, \rx
		bne	1003b
		b	1002f

1001:
		@ busy waiting for non fifo
		ldr	\rd, [\rx, # S3C2410_UTRSTAT]
ARM_BE8(rev \rd, \rd)
		tst	\rd, #S3C2410_UTRSTAT_TXFE
		beq	1001b

1002:		@ exit busyuart
	.endm

	.macro	waituartcts,rd,rx
	.endm

	.macro	waituarttxrdy,rd,rx
		ldr	\rd, [\rx, # S3C2410_UFCON]
ARM_BE8(rev \rd, \rd)

Annotation

Implementation Notes