arch/arm/mach-s3c/sleep-s3c64xx.S

Source file repositories/reference/linux-study-clean/arch/arm/mach-s3c/sleep-s3c64xx.S

File Facts

System
Linux kernel
Corpus path
arch/arm/mach-s3c/sleep-s3c64xx.S
Extension
.S
Size
1090 bytes
Lines
43
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/linkage.h>
#include <asm/assembler.h>
#include "map.h"

#undef S3C64XX_VA_GPIO
#define S3C64XX_VA_GPIO (0x0)

#include "regs-gpio.h"

#define LL_UART (S3C_PA_UART + (0x400 * CONFIG_S3C_LOWLEVEL_UART_PORT))

	.text

	/* Sleep magic, the word before the resume entry point so that the
	 * bootloader can check for a resumeable image. */

	.word	0x2bedf00d

	/* s3c_cpu_reusme
	 *
	 * This is the entry point, stored by whatever method the bootloader
	 * requires to get the kernel runnign again. This code expects to be
	 * entered with no caches live and the MMU disabled. It will then
	 * restore the MMU and other basic CP registers saved and restart
	 * the kernel C code to finish the resume code.
	*/

ENTRY(s3c_cpu_resume)
	msr	cpsr_c, #PSR_I_BIT | PSR_F_BIT | SVC_MODE
	ldr	r2, =LL_UART		/* for debug */
	b	cpu_resume

Annotation

Implementation Notes