kconfig

linux 内核源代码

# arch/arm/plat-s3c/Kconfig
#
# Copyright 2007 Simtec Electronics
#
# Licensed under GPLv2

config PLAT_S3C
	bool
	depends on ARCH_S3C2410
	default y if ARCH_S3C2410
	select NO_IOPORT
	help
	  Base platform code for any Samsung S3C device

# low-level serial option nodes

config CPU_LLSERIAL_S3C2410_ONLY
	bool
	depends on ARCH_S3C2410
	default y if CPU_LLSERIAL_S3C2410 && !CPU_LLSERIAL_S3C2440

config CPU_LLSERIAL_S3C2440_ONLY
	bool
	depends on ARCH_S3C2410
	default y if CPU_LLSERIAL_S3C2440 && !CPU_LLSERIAL_S3C2410

config CPU_LLSERIAL_S3C2410
	bool
	depends on ARCH_S3C2410
	help
	  Selected if there is an S3C2410 (or register compatible) serial
	  low-level implementation needed

config CPU_LLSERIAL_S3C2440
	bool
	depends on ARCH_S3C2410
	help
	  Selected if there is an S3C2440 (or register compatible) serial
	  low-level implementation needed

# boot configurations

comment "Boot options"

config S3C_BOOT_WATCHDOG
	bool "S3C Initialisation watchdog"
	depends on PLAT_S3C && S3C2410_WATCHDOG
	help
	  Say y to enable the watchdog during the kernel decompression
	  stage. If the kernel fails to uncompress, then the watchdog
	  will trigger a reset and the system should restart.

config S3C_BOOT_ERROR_RESET
	bool "S3C Reboot on decompression error"
	depends on PLAT_S3C
	help
	  Say y here to use the watchdog to reset the system if the
	  kernel decompressor detects an error during decompression.

comment "Power management"

config S3C2410_PM_DEBUG
	bool "S3C2410 PM Suspend debug"
	depends on PLAT_S3C && PM
	help
	  Say Y here if you want verbose debugging from the PM Suspend and
	  Resume code. See <file:Documentation/arm/Samsung-S3C24XX/Suspend.txt>
	  for more information.

config S3C2410_PM_CHECK
	bool "S3C2410 PM Suspend Memory CRC"
	depends on PLAT_S3C && PM && CRC32
	help
 	  Enable the PM code's memory area checksum over sleep. This option
	  will generate CRCs of all blocks of memory, and store them before
	  going to sleep. The blocks are then checked on resume for any
	  errors.

	  Note, this can take several seconds depending on memory size
	  and CPU speed.

	  See <file:Documentation/arm/Samsung-S3C24XX/Suspend.txt>

config S3C2410_PM_CHECK_CHUNKSIZE
	int "S3C2410 PM Suspend CRC Chunksize (KiB)"
	depends on PLAT_S3C && PM && S3C2410_PM_CHECK
	default 64
	help
	  Set the chunksize in Kilobytes of the CRC for checking memory
	  corruption over suspend and resume. A smaller value will mean that
	  the CRC data block will take more memory, but wil identify any
	  faults with better precision.

	  See <file:Documentation/arm/Samsung-S3C24XX/Suspend.txt>

config S3C_LOWLEVEL_UART_PORT
	int "S3C UART to use for low-level messages"
	depends on PLAT_S3C
	default 0
	help
	  Choice of which UART port to use for the low-level messages,
	  such as the `Uncompressing...` at start time. The value of
	  this configuration should be between zero and two. The port
	  must have been initialised by the boot-loader before use.