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前面是 Uboot 的发展,下载地址,如何获得帮助,以及版本说明
Directory Hierarchy:
目录层次
- board Board dependent files
开发板相关文件
- common Misc architecture independent functions
多体系结构独立函数
- cpu CPU specific files
CPU 相关文件
- 74xx_7xx Files specific to Freescale MPC74xx and 7xx CPUs
Freescale MPC74XX 的 CPU 相关文件
- arm720t Files specific to ARM 720 CPUs
ARM720 相关文件
- arm920t Files specific to ARM 920 CPUs
ARM920 相关文件
- at91rm9200 Files specific to Atmel AT91RM9200 CPU
AT91RM9200 相关
- imx Files specific to Freescale MC9328 i.MX CPUs
Freescale i.MX 相关
- s3c24x0 Files specific to Samsung S3C24X0 CPUs
- arm925t Files specific to ARM 925 CPUs
- arm926ejs Files specific to ARM 926 CPUs
- arm1136 Files specific to ARM 1136 CPUs
- at32ap Files specific to Atmel AVR32 AP CPUs
- i386 Files specific to i386 CPUs
- ixp Files specific to Intel XScale IXP CPUs
- leon2 Files specific to Gaisler LEON2 SPARC CPU
- leon3 Files specific to Gaisler LEON3 SPARC CPU
- mcf52x2 Files specific to Freescale ColdFire MCF52x2 CPUs
- mcf5227x Files specific to Freescale ColdFire MCF5227x CPUs
- mcf532x Files specific to Freescale ColdFire MCF5329 CPUs
- mcf5445x Files specific to Freescale ColdFire MCF5445x CPUs
- mcf547x_8x Files specific to Freescale ColdFire MCF547x_8x CPUs
- mips Files specific to MIPS CPUs
- mpc5xx Files specific to Freescale MPC5xx CPUs
- mpc5xxx Files specific to Freescale MPC5xxx CPUs
- mpc8xx Files specific to Freescale MPC8xx CPUs
- mpc8220 Files specific to Freescale MPC8220 CPUs
- mpc824x Files specific to Freescale MPC824x CPUs
- mpc8260 Files specific to Freescale MPC8260 CPUs
- mpc85xx Files specific to Freescale MPC85xx CPUs
- nios Files specific to Altera NIOS CPUs
- nios2 Files specific to Altera Nios-II CPUs
- ppc4xx Files specific to AMCC PowerPC 4xx CPUs
- pxa Files specific to Intel XScale PXA CPUs
- s3c44b0 Files specific to Samsung S3C44B0 CPUs
- sa1100 Files specific to Intel StrongARM SA1100 CPUs
- disk Code for disk drive partition handling
磁盘驱动,及分区操作的代码
- doc Documentation (don't expect too much)
文档(不要期待太多(搞不懂为什么了 ? ))
- drivers Commonly used device drivers
通用设备驱动
- dtt Digital Thermometer and Thermostat drivers
数字温度器及调温装置驱动
- examples Example code for standalone applications, etc.
独立应用程序的例子
- include Header Files
头文件
- lib_arm Files generic to ARM architecture
ARM 体系结构通用的文件
- lib_avr32 Files generic to AVR32 architecture
- lib_generic Files generic to all architectures
所有体系结构通用的文件
- lib_i386 Files generic to i386 architecture
- lib_m68k Files generic to m68k architecture
- lib_mips Files generic to MIPS architecture
- lib_nios Files generic to NIOS architecture
- lib_ppc Files generic to PowerPC architecture
- lib_sparc Files generic to SPARC architecture
- libfdt Library files to support flattened device trees
支持平板设备树的库文件
- net Networking code
网络代码
- post Power On Self Test
上电自检
- rtc Real Time Clock drivers
实时时钟驱动
- tools Tools to build S-Record or U-Boot images, etc.
编译 S-Record 和 U-Boot 镜像的工具
- api
1.3 版本的 UBOOT 还增加了一个 API 的文件夹,
这里放的是一些扩展应用的独立的 API 函数
软件配置:
=======================
Configuration is usually done using C preprocessor defines; the rationale behind that is to avoid dead code whenever possible.
配置是通过 C 预处理程序完成。
There are two classes of configuration variables:
有两类配置变量:
* Configuration _OPTIONS_:
配置选项:
These are selectable by the user and have names beginning with
"CONFIG_".
是可由用户选择并以“ CONFIG_ ”开头
* Configuration _SETTINGS_:
配置设置
These depend on the hardware etc. and should not be meddled with if
you don't know what you're doing; they have names beginning with
"CFG_".
依赖于硬件,由“ CFG_ ”开头
Later we will add a configuration tool - probably similar to or even
identical to what's used for the Linux kernel. Right now, we have to
do the configuration by hand, which means creating some symbolic
links and editing some configuration files. We use the TQM8xxL boards
as an example here.
以后我们将加入类似 Linux 内核一样的配置工具。但现在只能手工配置。
我们将以 TQM8XXL 为例。
第一步:
Selection of Processor Architecture and Board Type:
选择处理器架构和板类型:
---------------------------------------------------
For all supported boards there are ready-to-use default
configurations available; just type "make <board_name>_config".
对所有已至此的板都已经有可用的默认配置,只要执行:
make <boare_name>_config
下面是例子
Example: For a TQM823L module type:
cd u-boot
make TQM823L_config
For the Cogent platform, you need to specify the CPU type as well;
e.g. "make cogent_mpc8xx_config". And also configure the cogent
directory according to the instructions in cogent/README.
对于加强型平台还要指定 CPU 类型,请阅读 cogent/READM
第二步
Configuration Options:
配置选项:
----------------------
Configuration depends on the combination of board and CPU type; all
such information is kept in a configuration file
配置依赖于板和 CPU ,所有配置设置信息保存在:
"include/configs/<board_name>.h ".
Example: For a TQM823L module, all configuration settings are in
"include/configs/TQM823L.h".
Many of the options are named exactly as the corresponding Linux
kernel configuration options. The intention is to make it easier to
build a config tool - later.
The following options need to be configured:
以下的选项需要被配置:
这里 MPC 的配置比较多,如果是 SMDK2410 的话配置会少很多
- CPU Type: Define exactly one, e.g. CONFIG_MPC85XX.
CPU 类型 :正确地定义一个种类,比如: CONFIG_MPC85XX
- Board Type: Define exactly one, e.g. CONFIG_MPC8540ADS.
板类型: 比如: CONFIG_MPC8540ADS
- CPU Daughterboard Type: (if CONFIG_ATSTK1000 is defined)
Define exactly one, e.g. CONFIG_ATSTK1002
CPU 子类
- CPU Module Type: (if CONFIG_COGENT is defined)
Define exactly one of
CONFIG_CMA286_60_OLD
CPU 模型
--- FIXME --- not tested yet:
CONFIG_CMA286_60, CONFIG_CMA286_21, CONFIG_CMA286_60P,
CONFIG_CMA287_23, CONFIG_CMA287_50
- Motherboard Type: (if CONFIG_COGENT is defined)
Define exactly one of
CONFIG_CMA101, CONFIG_CMA102
主板
- Motherboard I/O Modules: (if CONFIG_COGENT is defined)
Define one or more of
CONFIG_CMA302
主板 I/O 模式
- Motherboard Options: (if CONFIG_CMA101 or CONFIG_CMA102 are defined)
Define one or more of
CONFIG_LCD_HEARTBEAT - update a character position on
the LCD display every second with
a "rotator" |/-/|/-/
- Board flavour: (if CONFIG_MPC8260ADS is defined)
CONFIG_ADSTYPE
Possible values are:
CFG_8260ADS - original MPC8260ADS
CFG_8266ADS - MPC8266ADS
CFG_PQ2FADS - PQ2FADS-ZU or PQ2FADS-VR
CFG_8272ADS - MPC8272ADS
- MPC824X Family Member (if CONFIG_MPC824X is defined)
Define exactly one of
CONFIG_MPC8240, CONFIG_MPC8245
- 8xx CPU Options: (if using an MPC8xx CPU)
CONFIG_8xx_GCLK_FREQ - deprecated: CPU clock if
get_gclk_freq() cannot work
e.g. if there is no 32KHz
reference PIT/RTC clock
CONFIG_8xx_OSCLK - PLL input clock (either EXTCLK
or XTAL/EXTAL)
- 859/866/885 CPU options: (if using a MPC859 or MPC866 or MPC885 CPU):
CFG_8xx_CPUCLK_MIN
CFG_8xx_CPUCLK_MAX
CONFIG_8xx_CPUCLK_DEFAULT
See doc/README.MPC866
CFG_MEASURE_CPUCLK
Define this to measure the actual CPU clock instead
of relying on the correctness of the configured
values. Mostly useful for board bringup to make sure
the PLL is locked at the intended frequency. Note
that this requires a (stable) reference clock (32 kHz
RTC clock or CFG_8XX_XIN)
- Intel Monahans options:
CFG_MONAHANS_RUN_MODE_OSC_RATIO
Defines the Monahans run mode to oscillator
ratio. Valid values are 8, 16, 24, 31. The core
frequency is this value multiplied by 13 MHz.
CFG_MONAHANS_TURBO_RUN_MODE_RATIO
Defines the Monahans turbo mode to oscillator
ratio. Valid values are 1 (default if undefined) and
2. The core frequency as calculated above is multiplied
by this value.
- Linux Kernel Interface:
- Linux 内核接口
CONFIG_CLOCKS_IN_MHZ
U-Boot stores all clock information in Hz
internally.
UBOOT 以 Hz 位单位存储时钟信息
For binary compatibility with older Linux
kernels (which expect the clocks passed in the
bd_info data to be in MHz
Linux 内核期望时钟是以 MHz 位单位传到 bd_info 的 )
the environment variable
为了和内核兼容可以定义环境变量
"clocks_in_mhz " can be defined so that U-Boot
converts clock data to MHZ before passing it to the
Linux kernel.
把 UBOOT 的时钟数据转换位 MHz 后传入内核
When CONFIG_CLOCKS_IN_MHZ is defined, a definition of
"clocks_in_mhz=1" is automatically included in the
default environment.
当 CONFIG_CLOCKS_IN_MHZ 被定义后 clocks_in_mhz=1
会被自动包含到环境中
CONFIG_MEMSIZE_IN_BYTES [relevant for MIPS only]
只跟 MIPS 相关
When transferring memsize parameter to linux, some versions
expect it to be in bytes, others in MB.
Define CONFIG_MEMSIZE_IN_BYTES to make it in bytes.
对于内存大小的参数可以定义 CONFIG_MEMSIZE_IN_BYTES
以 BYTES 位单位
CONFIG_OF_LIBFDT
New kernel versions are expecting firmware settings to be
passed using flattened device trees (based on open firmware
concepts).
CONFIG_OF_LIBFDT
* New libfdt-based support
* Adds the "fdt" command
* The bootm command automatically updates the fdt
OF_CPU - The proper name of the cpus node.
OF_SOC - The proper name of the soc node.
OF_TBCLK - The timebase frequency.
OF_STDOUT_PATH - The path to the console device
boards with QUICC Engines require OF_QE to set UCC MAC
addresses
CONFIG_OF_BOARD_SETUP
Board code has addition modification that it wants to make
to the flat device tree before handing it off to the kernel
CONFIG_OF_BOOT_CPU
This define fills in the correct boot CPU in the boot
param header, the default value is zero if undefined.
- Serial Ports:
- 串口
CFG_PL010_SERIAL
Define this if you want support for Amba PrimeCell PL010 UARTs.
要支持 Amba PrimeCell PL010 UARTs 就定义此项
CFG_PL011_SERIAL
Define this if you want support for Amba PrimeCell PL011 UARTs.
CONFIG_PL011_CLOCK
If you have Amba PrimeCell PL011 UARTs, set this variable to
the clock speed of the UARTs.
CONFIG_PL01x_PORTS
If you have Amba PrimeCell PL010 or PL011 UARTs on your board,
define this to a list of base addresses for each (supported)
port. See e.g. include/configs/versatile.h
- Console Interface:
- 控制台接口
Depending on board, define exactly one serial port
(like CONFIG_8xx_CONS_SMC1, CONFIG_8xx_CONS_SMC2,
CONFIG_8xx_CONS_SCC1, ...), or switch off the serial
console by defining CONFIG_8xx_CONS_NONE
依赖于板,定义一个串口
Note: if CONFIG_8xx_CONS_NONE is defined, the serial
port routines must be defined elsewhere
(i.e. serial_init(), serial_getc(), ...)
CONFIG_CFB_CONSOLE
Enables console device for a color framebuffer.
使能控制台器件的彩色帧缓存
Needs following
defines (cf. smiLynxEM, i8042, board/eltec/bab7xx)
VIDEO_FB_LITTLE_ENDIAN graphic memory organisation
(default big endian)
VIDEO_HW_RECTFILL graphic chip supports
rectangle fill
(cf. smiLynxEM)
VIDEO_HW_BITBLT graphic chip supports
bit-blit (cf. smiLynxEM)
VIDEO_VISIBLE_COLS visible pixel columns
(cols=pitch)
VIDEO_VISIBLE_ROWS visible pixel rows
VIDEO_PIXEL_SIZE bytes per pixel
VIDEO_DATA_FORMAT graphic data format
(0-5, cf. cfb_console.c)
VIDEO_FB_ADRS framebuffer address
VIDEO_KBD_INIT_FCT keyboard int fct
(i.e. i8042_kbd_init())
VIDEO_TSTC_FCT test char fct
(i.e. i8042_tstc)
VIDEO_GETC_FCT get char fct
(i.e. i8042_getc)
CONFIG_CONSOLE_CURSOR cursor drawing on/off
(requires blink timer
cf. i8042.c)
CFG_CONSOLE_BLINK_COUNT blink interval (cf. i8042.c)
CONFIG_CONSOLE_TIME display time/date info in
upper right corner
(requires CONFIG_CMD_DATE)
CONFIG_VIDEO_LOGO display Linux logo in
upper left corner
CONFIG_VIDEO_BMP_LOGO use bmp_logo.h instead of
linux_logo.h for logo.
Requires CONFIG_VIDEO_LOGO
CONFIG_CONSOLE_EXTRA_INFO
additional board info beside
the logo
When CONFIG_CFB_CONSOLE is defined, video console is
default i/o.
当定义了 CONFIG_CFB_CONSOLE 后,视频控制台位默认 I/O
Serial console can be forced with
environment 'console=serial'.
When CONFIG_SILENT_CONSOLE is defined, all console
messages (by U-Boot and Linux!) can be silenced with
the "silent" environment variable.
若定义了 CONFIG_SILENT_CONSOLE ,则所有控制台信息
都为缄默模式
See
doc/README.silent for more information.
查看 doc/README.silent 获得帮助
- Console Baudrate:
- 控制台波特率
CONFIG_BAUDRATE - in bps
Select one of the baudrates listed in
CFG_BAUDRATE_TABLE , see below.
CFG_BRGCLK_PRESCALE , baudrate prescale
- Interrupt driven serial port input:
- 中断驱动串口输入
CONFIG_SERIAL_SOFTWARE_FIFO
PPC405GP only.
仅对 PPC405GP
Use an interrupt handler for receiving data on the
serial port. It also enables using hardware handshake
(RTS/CTS) and UART's built-in FIFO. Set the number of
bytes the interrupt driven input buffer should have.
Leave undefined to disable this feature, including
disable the buffer and hardware handshake.
- Console UART Number:
- 控制台 UART 数
CONFIG_UART1_CONSOLE
AMCC PPC4xx only.
仅对 AMCC PPC4XX
If defined internal UART1 (and not UART0) is used
as default U-Boot console.
- Boot Delay:
- 启动延时
- CONFIG_BOOTDELAY - in seconds
Delay before automatically booting the default image;
自动引导默认镜像的延时
set to -1 to disable autoboot.
-1 为禁止自动启动
See doc/README.autoboot for these options that
work with CONFIG_BOOTDELAY. None are required.
关于 CONFIG_BOOTDELAY 的选项请查阅 doc/README.autoboot
引导重试环境变量
CONFIG_BOOT_RETRY_TIME
CONFIG_BOOT_RETRY_MIN
这两个决定在 UBOOT 停止引导等待命令过程中的行为,
若环境变量 "bootretry" 存在,则 "bootretry" 的值将被应用,否则默认超时时间为
CONFIG_BOOT_RETRY_TIME 的值, CONFIG_BOOT_RETRY_MIN 被选为 CONFIG_BOOT_RETRY_TIME 的缺省值,若 CONFIG_BOOT_RETRY_TIME 为负则不会发生超时。
CONFIG_AUTOBOOT_KEYED
CONFIG_AUTOBOOT_PROMPT
CONFIG_AUTOBOOT_DELAY_STR
CONFIG_AUTOBOOT_STOP_STR
CONFIG_AUTOBOOT_DELAY_STR2
CONFIG_AUTOBOOT_STOP_STR2
"bootdelaykey" environment variable
"bootstopkey" environment variable
"bootdelaykey2" environment variable
"bootstopkey2" environment variable
这些选项给停止自动引导提供更多的控制。当应用他们时就需要输入特定的字符或字符串来停止或延时自动引导。
CONFIG_AUTOBOOT_PROMPT 显示一些信,但 CONFIG_BOOTDELAY 必须被定义。
#define CONFIG_AUTOBOOT_PROMPT /
"autoboot in %d seconds/n",bootdelay
若 CONFIG_AUTOBOOT_DELAY_STR 或 "bootdelaykey" 被定义,但从控制台输入特定字符时,就会出现 UBOOT 提示符,停止自动引导。超时后自动重新引导。
若 CONFIG_AUTOBOOT_STOP_STR 或 "bootstopkey" 被定义,但从控制台输入特定字符时,就会出现 UBOOT 提示符,停止自动引导。超时后不自动重新引导。
CONFIG_AUTOBOOT_DELAY_STR2 或 "bootstopkey2" 则允许你有两个进入字符
CONFIG_ZERO_BOOTDELAY_CHECK
CONFIG_RESET_TO_RETRY
CONFIG_ZERO_BOOTDELAY_CHECK 此选项能让你通过敲击一个键来停止自动引导。
CONFIG_RESET_TO_RETRY 当 CONFIG_BOOT_RETRY_TIME 被定义时才有效。当超时时板将重启。
- Autoboot Command:
- 自动引导命令
CONFIG_BOOTCOMMAND
Only needed when CONFIG_BOOTDELAY is enabled;
当 CONFIG_BOOTDELAY 使能使需要
define a command string that is automatically executed
when no character is read on the console interface
within "Boot Delay" after reset.
当启动延时时间内没有从控制接口都取字符时自动执行
它定义的命令字符
CONFIG_BOOTARGS
This can be used to pass arguments to the bootm
command. The value of CONFIG_BOOTARGS goes into the
environment value "bootargs".
传递参数到 bootm 命令
CONFIG_RAMBOOT and CONFIG_NFSBOOT
The value of these goes into the environment as
"ramboot" and "nfsboot" respectively, and can be used
as a convenience, when switching between booting from
RAM and NFS.
实现从 RAM 和 NFS 启动的转换
- Pre-Boot Commands:
CONFIG_PREBOOT
When this option is #defined, the existence of the
environment variable "preboot" will be checked
immediately before starting the CONFIG_BOOTDELAY
countdown and/or running the auto-boot command resp.
entering interactive mode.
This feature is especially useful when "preboot" is
automatically generated or modified. For an example
see the LWMON board specific code: here "preboot" is
modified when the user holds down a certain
combination of keys on the (special) keyboard when
booting the systems
- Serial Download Echo Mode:
- 串口下载回显模式
CONFIG_LOADS_ECHO
If defined to 1, all characters received during a
serial download (using the "loads" command) are
echoed back.
当设置为 1 时串口在下载时所有接受的字符都回显出来
This might be needed by some terminal
emulations (like "cu"), but may as well just take
time on others. This setting #define's the initial
value of the "loads_echo" environment variable.
这个设置定义了 "loads_echo" 的环境变量
- Kgdb Serial Baudrate: (if CONFIG_CMD_KGDB is defined )
- Kgdb 串口波特率
CONFIG_KGDB_BAUDRATE
Select one of the baudrates listed in
CFG_BAUDRATE_TABLE ,
这里定义了所有可用波特率的表
see below.
- Monitor Functions:
- 监视函数
Monitor commands can be included or excluded
from the build by using the #include files
通过编译时包含 "config_cmd_all.h" 头文件来包含所有的监控命令
And 通过 #undef'ing 去掉不需要的命令 unwanted
commands, or using "config_cmd_default.h" 为包含默认命令
and augmenting with additional #define's
for wanted commands.
The default command configuration includes all commands
except those marked below with a "*".
默认命令配置包含所有不带“ * ”标记的命令
CONFIG_CMD_ASKENV * ask for env variable
请求环境变量
CONFIG_CMD_AUTOSCRIPT. Autoscript. Support
自动脚本支持
CONFIG_CMD_BDI bdinfo
CONFIG_CMD_BEDBUG * Include BedBug Debugger
CONFIG_CMD_BMP * BMP support
CONFIG_CMD_BSP * Board specific commands
CONFIG_CMD_BOOTD bootd
CONFIG_CMD_CACHE * icache, dcache
CONFIG_CMD_CONSOLE coninfo
CONFIG_CMD_DATE * support for RTC, date/time...
CONFIG_CMD_DHCP * DHCP support
CONFIG_CMD_DIAG * Diagnostics
CONFIG_CMD_DOC * Disk-On-Chip Support
CONFIG_CMD_DTT * Digital Therm and Thermostat
CONFIG_CMD_ECHO echo arguments
CONFIG_CMD_EEPROM * EEPROM read/write support
CONFIG_CMD_ELF * bootelf, bootvx
CONFIG_CMD_ENV saveenv
CONFIG_CMD_FDC * Floppy Disk Support
CONFIG_CMD_FAT * FAT partition support
CONFIG_CMD_FDOS * Dos diskette Support
CONFIG_CMD_FLASH flinfo, erase, protect
CONFIG_CMD_FPGA FPGA device initialization support
CONFIG_CMD_HWFLOW * RTS/CTS hw flow control
CONFIG_CMD_I2C * I2C serial bus support
CONFIG_CMD_IDE * IDE harddisk support
CONFIG_CMD_IMI iminfo
CONFIG_CMD_IMLS List all found images
CONFIG_CMD_IMMAP * IMMR dump support
CONFIG_CMD_IRQ * irqinfo
CONFIG_CMD_ITEST Integer/string test of 2 values
CONFIG_CMD_JFFS2 * JFFS2 Support
CONFIG_CMD_KGDB * kgdb
CONFIG_CMD_LOADB loadb
CONFIG_CMD_LOADS loads
CONFIG_CMD_MEMORY md, mm, nm, mw, cp, cmp, crc, base,
loop, loopw, mtest
CONFIG_CMD_MISC Misc functions like sleep etc
CONFIG_CMD_MMC * MMC memory mapped support
CONFIG_CMD_MII * MII utility commands
CONFIG_CMD_NAND * NAND support
CONFIG_CMD_NET bootp, tftpboot, rarpboot
CONFIG_CMD_PCI * pciinfo
CONFIG_CMD_PCMCIA * PCMCIA support
CONFIG_CMD_PING * send ICMP ECHO_REQUEST to network
host
CONFIG_CMD_PORTIO * Port I/O
CONFIG_CMD_REGINFO * Register dump
CONFIG_CMD_RUN run command in env variable
CONFIG_CMD_SAVES * save S record dump
CONFIG_CMD_SCSI * SCSI Support
CONFIG_CMD_SDRAM * print SDRAM configuration information
(requires CONFIG_CMD_I2C)
CONFIG_CMD_SETGETDCR Support for DCR Register access
(4xx only)
CONFIG_CMD_SPI * SPI serial bus support
CONFIG_CMD_USB * USB support
CONFIG_CMD_VFD * VFD support (TRAB)
CONFIG_CMD_CDP * Cisco Discover Protocol support
CONFIG_CMD_FSL * Microblaze FSL support
EXAMPLE: If you want all functions except of network
support you can write:
比如你需要除网络外的所有函数,你可以写入下面几行
#include "config_cmd_all.h"
#undef CONFIG_CMD_NET
Other Commands:
fdt (flattened device tree) command: CONFIG_OF_LIBFDT
Note: Don't enable the "icache" and "dcache" commands
(configuration option CONFIG_CMD_CACHE) unless you know
what you (and your U-Boot users) are doing. Data
cache cannot be enabled on systems like the 8xx or
8260 (where accesses to the IMMR region must be
uncached), and it cannot be disabled on all other
systems where we (mis-) use the data cache to hold an
initial stack and some data.
XXX - this list needs to get updated!
- Watchdog:
- 看门狗
CONFIG_WATCHDOG
If this variable is defined, it enables watchdog
support.
若被定义则支持看门狗
There must be support in the platform. specific
code for a watchdog. For the 8xx and 8260 CPUs, the
SIU Watchdog feature is enabled in the SYPCR
register.
- U-Boot Version:
- UBOOT 版本
CONFIG_VERSION_VARIABLE
If this variable is defined, an environment variable
named "ver" is created by U-Boot showing the U-Boot
version as printed by the "version" command.
This variable is readonly.
若这个变量被定义则 "ver" 的环境变量被 UBOOT 创建,通过 "version" 命令进行读取,此变量为只读
- Real-Time Clock:
- 实时时钟
When CONFIG_CMD_DATE is selected, the type of the RTC
has to be selected, too. Define exactly one of the
following options:
当 CONFIG_CMD_DATE 被选取时, RTC 的类型也要被选取,从以下选项中选一个最接近的
CONFIG_RTC_MPC8xx - use internal RTC of MPC8xx
CONFIG_RTC_PCF8563 - use Philips PCF8563 RTC
CONFIG_RTC_MC13783 - use MC13783 RTC
CONFIG_RTC_MC146818 - use MC146818 RTC
CONFIG_RTC_DS1307 - use Maxim, Inc. DS1307 RTC
CONFIG_RTC_DS1337 - use Maxim, Inc. DS1337 RTC
CONFIG_RTC_DS1338 - use Maxim, Inc. DS1338 RTC
CONFIG_RTC_DS164x - use Dallas DS164x RTC
CONFIG_RTC_ISL1208 - use Intersil ISL1208 RTC
CONFIG_RTC_MAX6900 - use Maxim, Inc. MAX6900 RTC
CFG_RTC_DS1337_NOOSC - Turn off the OSC output for DS1337
Note that if the RTC uses I2C, then the I2C interface
must also be configured. See I2C Support, below.
若 RTC 用 I2C ,则 I2C 接口也要被配置。
- Timestamp Support:
- 时间戳支持
When CONFIG_TIMESTAMP is selected, the timestamp
(date and time) of an image is printed by image
commands like bootm or iminfo. This option is
automatically enabled when you select CONFIG_CMD_DATE .
当选择了 CONFIG_CMD_DATE 后这个选项被自动使能,通过映像命令来打印映像的时间戳
- Partition Support:
- 分区支持
CONFIG_MAC_PARTITION and/or CONFIG_DOS_PARTITION
and/or CONFIG_ISO_PARTITION
If IDE or SCSI support is enabled (CONFIG_CMD_IDE or
CONFIG_CMD_SCSI ) you must configure support for at
least one partition type as well.
- IDE Reset method:
- 对 IDE 的支持
CONFIG_IDE_RESET_ROUTINE - this is defined in several
board configurations files but used nowhere!
CONFIG_IDE_RESET - is this is defined, IDE Reset will
be performed by calling the function
ide_set_reset(int reset)
which has to be defined in a board specific file
- ATAPI Support:
CONFIG_ATAPI
Set this to enable ATAPI support.
- LBA48 Support
CONFIG_LBA48
Set this to enable support for disks larger than 137GB
Also look at CFG_64BIT_LBA ,CFG_64BIT_VSPRINTF and CFG_64BIT_STRTOUL
Whithout these , LBA48 support uses 32bit variables and will 'only'
support disks up to 2.1TB.
CFG_64BIT_LBA:
When enabled, makes the IDE subsystem use 64bit sector addresses.
Default is 32bit.
- SCSI Support:
At the moment only there is only support for the
SYM53C8XX SCSI controller; define
CONFIG_SCSI_SYM53C8XX to enable it.
CFG_SCSI_MAX_LUN [8], CFG_SCSI_MAX_SCSI_ID [7] and
CFG_SCSI_MAX_DEVICE [CFG_SCSI_MAX_SCSI_ID *
CFG_SCSI_MAX_LUN] can be adjusted to define the
maximum numbers of LUNs, SCSI ID's and target
devices.
CFG_SCSI_SYM53C8XX_CCF to fix clock timing (80Mhz)
- NETWORK Support (PCI):
- 网络支持( PCI )
CONFIG_E1000
Support for Intel 8254x gigabit chips.
CONFIG_E1000_FALLBACK_MAC
default MAC for empty EEPROM after production.
CONFIG_EEPRO100
Support for Intel 82557/82559/82559ER chips.
Optional CONFIG_EEPRO100_SROM_WRITE enables EEPROM
write routine for first time initialisation.
CONFIG_TULIP
Support for Digital 2114x chips.
Optional CONFIG_TULIP_SELECT_MEDIA for board specific
modem chip initialisation (KS8761/QS6611).
CONFIG_NATSEMI
Support for National dp83815 chips.
CONFIG_NS8382X
Support for National dp8382[01] gigabit chips.
- NETWORK Support (other):
CONFIG_DRIVER_LAN91C96
Support for SMSC's LAN91C96 chips.
CONFIG_LAN91C96_BASE
Define this to hold the physical address
of the LAN91C96's I/O space
CONFIG_LAN91C96_USE_32_BIT
Define this to enable 32 bit addressing
CONFIG_DRIVER_SMC91111
Support for SMSC's LAN91C111 chip
CONFIG_SMC91111_BASE
Define this to hold the physical address
of the device (I/O space)
CONFIG_SMC_USE_32_BIT
Define this if data bus is 32 bits
CONFIG_SMC_USE_IOFUNCS
Define this to use i/o functions instead of macros
(some hardware wont work with macros)
CONFIG_DRIVER_SMC911X
Support for SMSC's LAN911x and LAN921x chips
CONFIG_DRIVER_SMC911X_BASE
Define this to hold the physical address
of the device (I/O space)
CONFIG_DRIVER_SMC911X_32_BIT
Define this if data bus is 32 bits
CONFIG_DRIVER_SMC911X_16_BIT
Define this if data bus is 16 bits. If your processor
automatically converts one 32 bit word to two 16 bit
words you may also try CONFIG_DRIVER_SMC911X_32_BIT.
- USB Support:
- USB 支持
At the moment only the UHCI host controller is
supported (PIP405, MIP405, MPC5200);
目前只支持通用主控制器接口的主控制器
defineCONFIG_USB_UHCI to enable it.
定义 CONFIG_USB_UHCI 允许 USB 主控制器
define CONFIG_USB_KEYBOARD to enable the USB Keyboard
定义 CONFIG_USB_KEYBOARD 允许 USB 键盘
and define CONFIG_USB_STORAGE to enable the USB
定义 CONFIG_USB_STORAGE 来允许 USB 储存器
storage devices.
Note:
Supported are USB Keyboards and USB Floppy drives
(TEAC FD-05PUB).
MPC5200 USB requires additional defines:
CONFIG_USB_CLOCK
for 528 MHz Clock: 0x0001bbbb
CONFIG_USB_CONFIG
for differential drivers: 0x00001000
for single ended drivers: 0x00005000
CFG_USB_EVENT_POLL
May be defined to allow interrupt polling
instead of using asynchronous interrupts
- USB Device:
- USB 器件
Define the below if you wish to use the USB console.
若想使用 USB 控制台,定义下面的变量
Once firmware is rebuilt from a serial console issue the
command "setenv stdin usbtty; setenv stdout usbtty" and
attach your USB cable. The Unix command "dmesg" should print
it has found a new device. The environment variable usbtty
can be set to gserial or cdc_acm to enable your device to
appear to a USB host as a Linux gserial device or a
Common Device Class Abstract Control Model serial device.
If you select usbtty = gserial you should be able to enumerate
a Linux host by
# modprobe usbserial vendor=0xVendorID product=0xProductID
else if using cdc_acm, simply setting the environment
variable usbtty to be cdc_acm should suffice. The following
might be defined in YourBoardName.h
CONFIG_USB_DEVICE
Define this to build a UDC device
定义这项来构建 UDC 设备
CONFIG_USB_TTY
Define this to have a tty type of device available to
talk to the UDC device
定义,以拥有一个和 UDC 通信的 tty 设备。
CFG_CONSOLE_IS_IN_ENV
Define this if you want stdin, stdout &/or stderr to
be set to usbtty.
若想 stdin,stdout,stderr 被设置到 usbtty 就定义此项
mpc8xx:
CFG_USB_EXTC_CLK 0xBLAH
Derive USB clock from external clock "blah"
- CFG_USB_EXTC_CLK 0x02
CFG_USB_BRG_CLK 0xBLAH
Derive USB clock from brgclk
- CFG_USB_BRG_CLK 0x04
If you have a USB-IF assigned VendorID then you may wish to
define your own vendor specific values either in BoardName.h
or directly in usbd_vendor_info.h . If you don't define
CONFIG_USBD_MANUFACTURER, CONFIG_USBD_PRODUCT_NAME,
CONFIG_USBD_VENDORID and CONFIG_USBD_PRODUCTID, then U-Boot
should pretend to be a Linux device to it's target host.
若没有定义 CONFIG_USBD_MANUFACTURER, CONFIG_USBD_PRODUCT_NAME,
CONFIG_USBD_VENDORID and CONFIG_USBD_PRODUCTID 则 UBOOT 就对其目标主机假装成一个 Linux 设备
CONFIG_USBD_MANUFACTURER
Define this string as the name of your company for
- CONFIG_USBD_MANUFACTURER "my company"
CONFIG_USBD_PRODUCT_NAME
Define this string as the name of your product
- CONFIG_USBD_PRODUCT_NAME "acme usb device"
CONFIG_USBD_VENDORID
Define this as your assigned Vendor ID from the USB
Implementors Forum. This *must* be a genuine Vendor ID
to avoid polluting the USB namespace.
- CONFIG_USBD_VENDORID 0xFFFF
CONFIG_USBD_PRODUCTID
Define this as the unique Product ID
for your device
- CONFIG_USBD_PRODUCTID 0xFFFF
- MMC Support:
- MMC 支持
The MMC controller on the Intel PXA is supported. To
enable this define CONFIG_MMC. The MMC can be
accessed from the boot prompt by mapping the device
to physical memory similar to flash. Command line is
enabled with CONFIG_CMD_MMC. The MMC driver also works with
the FAT fs. This is enabled with CONFIG_CMD_FAT.
- Journaling Flash filesystem support:
- Flash 日志文件系统支持
CONFIG_JFFS2_NAND, CONFIG_JFFS2_NAND_OFF, CONFIG_JFFS2_NAND_SIZE,
CONFIG_JFFS2_NAND_DEV
Define these for a default partition on a NAND device
定义这些作为 NAND 缺省分区支持
CFG_JFFS2_FIRST_SECTOR,
CFG_JFFS2_FIRST_BANK, CFG_JFFS2_NUM_BANKS
Define these for a default partition on a NOR device
定义这些作为 NOR 缺省分区支持
CFG_JFFS_CUSTOM_PART
Define this to create an own partition. You have to provide a
function struct part_info* jffs2_part_info(int part_num)
定义自己的分区,你必须提供函数结构
part_info* jffs2_part_info(int part_num)
If you define only one JFFS2 partition you may also want to
若只定义一个 JFFF2 分区则用以下命令
#define CFG_JFFS_SINGLE_PART 1
to disable the command chpart. This is the default when you
have not defined a custom partition
- Keyboard Support:
CONFIG_ISA_KEYBOARD
Define this to enable standard (PC-Style) keyboard
support
CONFIG_I8042_KBD
Standard PC keyboard driver with US (is default) and
GERMAN key layout (switch via environment 'keymap=de') support.
Export function i8042_kbd_init, i8042_tstc and i8042_getc
for cfb_console. Supports cursor blinking.
- Video support:
- 视频支持
CONFIG_VIDEO
Define this to enable video support (for output to
video).
定义此项允许输出视频
CONFIG_VIDEO_CT69000
Enable Chips & Technologies 69000 Video chip
CONFIG_VIDEO_SMI_LYNXEM
Enable Silicon Motion SMI 712/710/810 Video chip.
支持慧荣科技 SMI 712/710/810 视频芯片
The
video output is selected via environment 'videoout'
(1 = LCD and 2 = CRT). If videoout is undefined, CRT is
assumed.
视频输出通过环境变量 'videoout' 选择, 1 为 LCD , 2 为 CRT ,默认为 CRT
For the CT69000 and SMI_LYNXEM drivers, videomode is
selected via environment 'videomode'. Two different ways
are possible:
- "videomode=num" 'num' is a standard LiLo mode numbers.
视频模式由环境变量 'videomode' 选择
- "videomode=num"
Following standard modes are supported (* is default):
Colors 640x480 800x600 1024x768 1152x864 1280x1024
-------------+---------------------------------------------
8 bits | 0x301* 0x303 0x305 0x161 0x307
15 bits | 0x310 0x313 0x316 0x162 0x319
16 bits | 0x311 0x314 0x317 0x163 0x31A
24 bits | 0x312 0x315 0x318 ? 0x31B
-------------+---------------------------------------------
应用举例
(i.e. setenv videomode 317; saveenv; reset;)
- "videomode=bootargs" all the video parameters are parsed
from the bootargs. (See drivers/video/videomodes.c )
CONFIG_VIDEO_SED13806
Enable Epson SED13806 driver. This driver supports 8bpp
and 16bpp modes defined by CONFIG_VIDEO_SED13806_8BPP
or CONFIG_VIDEO_SED13806_16BPP
- Keyboard Support:
CONFIG_KEYBOARD
Define this to enable a custom keyboard support.
This simply calls drv_keyboard_init() which must be
defined in your board-specific files.
The only board using this so far is RBC823.
- LCD Support:
- 支持 LCD
CONFIG_LCD
Define this to enable LCD support (for output to LCD
display); also select one of the supported displays
by defining one of these:
定义此项来支持 LCD 输出,同时从以下几个选项中选一个来配置
CONFIG_ATMEL_LCD:
HITACHI TX09D70VM1CCA, 3.5", 240x320.
日立 TX09D70VM1CCA, 3.5", 240x320
CONFIG_NEC_NL6448AC33:
NEC NL6448AC33-18. Active, color, single scan.
CONFIG_NEC_NL6448BC20
NEC NL6448BC20-08. 6.5", 640x480.
Active, color, single scan.
CONFIG_NEC_NL6448BC33_54
NEC NL6448BC33-54. 10.4", 640x480.
Active, color, single scan.
CONFIG_SHARP_16x9
Sharp 320x240. Active, color, single scan.
It isn't 16x9, and I am not sure what it is.
CONFIG_SHARP_LQ64D341
Sharp LQ64D341 display, 640x480.
Active, color, single scan.
CONFIG_HLD1045
HLD1045 display, 640x480.
Active, color, single scan.
CONFIG_OPTREX_BW
Optrex CBL50840-2 NF-FW 99 22 M5
or
Hitachi LMG6912RPFC-00T
or
Hitachi SP14Q002
320x240. Black & white.
Normally display is black on white background;
正常显示为白底黑字
Define CFG_WHITE_ON_BLACK to get it inverted.
定义 CFG_WHITE_ON_BLACK 取得反白效果
- Splash Screen Support:
- 溅射屏幕(程序启动画面)支持
CONFIG_SPLASH_SCREEN
If this option is set, the environment is checked for
a variable "splashimage". If found, the usual display
of logo, copyright and system information on the LCD
is suppressed and the BMP image at the address
specified in "splashimage" is loaded instead. The
console is redirected to the "nulldev", too. This
allows for a "silent" boot where a splash screen is
loaded very quickly after power-on.
若被设置,就会在启动时显示放于环境变量 "splashimage" 中的 BMP 图片
- Gzip compressed BMP image support:
- Gzip 压缩 BMP 图片支持
CONFIG_VIDEO_BMP_GZIP
If this option is set, additionally to standard BMP
images, gzipped BMP images can be displayed via the
splashscreen support or the bmp command.
- Compression support:
- 压缩支持
CONFIG_BZIP2
If this option is set, support for bzip2 compressed
images is included. If not, only uncompressed and gzip
compressed images are supported.
若被设置就能支持 bzip2 压缩格式的映像
NOTE: the bzip2 algorithm requires a lot of RAM, so
the malloc area (as defined by CFG_MALLOC_LEN) should
be at least 4MB.
- MII/PHY support:
- 媒体独立接口 / 物理接口收发器支持
CONFIG_PHY_ADDR
The address of PHY on MII bus.
媒体独立接口中物理层的地址
CONFIG_PHY_CLOCK_FREQ (ppc4xx)
The clock frequency of the MII bus
媒体独立接口时钟频率
CONFIG_PHY_GIGE
If this option is set, support for speed/duplex
detection of gigabit PHY is included.
CONFIG_PHY_RESET_DELAY
Some PHY like Intel LXT971A need extra delay after
reset before any MII register access is possible.
For such PHY, set this option to the usec delay
required. (minimum 300usec for LXT971A)
物理层接口延时,某些物理层接口如 Intel LXT971A 重启后需要一定延时时间
CONFIG_PHY_CMD_DELAY (ppc4xx)
Some PHY like Intel LXT971A need extra delay after
command issued before MII status register can be read
- Ethernet address:
- 以太网地址
CONFIG_ETHADDR
CONFIG_ETH2ADDR
CONFIG_ETH3ADDR
Define a default value for Ethernet address to use
for the respective Ethernet interface, in case this
is not determined automatically.
配置不同以太网接口的地址
- IP address:
- IP 地址
CONFIG_IPADDR
Define a default value for the IP address to use for
the default Ethernet interface, in case this is not
determined through e.g. bootp.
- Server IP address:
- 服务器 IP 地址
CONFIG_SERVERIP
Defines a default value for the IP address of a TFTP
server to contact when using the "tftboot" command.
为 "tftboot" 命令的 TFTP 服务定义一个缺省的 IP 地址
- Multicast TFTP Mode:
- 多点传送 TFTP 模式
CONFIG_MCAST_TFTP
Defines whether you want to support multicast TFTP as per
rfc-2090; for example to work with atftp. Lets lots of targets
tftp down the same boot image concurrently. Note: the Ethernet
driver in use must provide a function: mcast() to join/leave a
multicast group.
定义是否支持多目标 tftp 同时下载同一映像,在以太网驱动中必须用 mcast() 函数来加入 / 离开多点传送。
CONFIG_BOOTP_RANDOM_DELAY
- BOOTP Recovery Mode:
CONFIG_BOOTP_RANDOM_DELAY
If you have many targets in a network that try to
boot using BOOTP, you may want to avoid that all
systems send out BOOTP requests at precisely the same
moment (which would happen for instance at recovery
from a power failure, when all systems will try to
boot, thus flooding the BOOTP server. Defining
CONFIG_BOOTP_RANDOM_DELAY causes a random delay to be
inserted before sending out BOOTP requests.
定义一个 BOOTP 请求发送延时来避免所有系统正好同时发出 BOOTP 请求(同时发请求会导致 BOOTP 服务器溢出)
The following delays are inserted then:
插入的延时时间表
1st BOOTP request: delay 0 ... 1 sec
2nd BOOTP request: delay 0 ... 2 sec
3rd BOOTP request: delay 0 ... 4 sec
4th and following
BOOTP requests: delay 0 ... 8 sec
- DHCP Advanced Options:
- DHCP 高级选项
You can fine tune the DHCP functionality by defining
CONFIG_BOOTP_* symbols:
CONFIG_BOOTP_SUBNETMASK
CONFIG_BOOTP_GATEWAY
CONFIG_BOOTP_HOSTNAME
CONFIG_BOOTP_NISDOMAIN
CONFIG_BOOTP_BOOTPATH
CONFIG_BOOTP_BOOTFILESIZE
CONFIG_BOOTP_DNS
CONFIG_BOOTP_DNS2
CONFIG_BOOTP_SEND_HOSTNAME
CONFIG_BOOTP_NTPSERVER
CONFIG_BOOTP_TIMEOFFSET
CONFIG_BOOTP_VENDOREX
CONFIG_BOOTP_SERVERIP - TFTP server will be the serverip
environment variable, not the BOOTP server.
CONFIG_BOOTP_DNS2 - If a DHCP client requests the DNS
serverip from a DHCP server, it is possible that more
than one DNS serverip is offered to the client.
If CONFIG_BOOTP_DNS2 is enabled, the secondary DNS
serverip will be stored in the additional environment
variable "dnsip2". The first DNS serverip is always
stored in the variable "dnsip", when CONFIG_BOOTP_DNS
is defined.
CONFIG_BOOTP_SEND_HOSTNAME - Some DHCP servers are capable
to do a dynamic update of a DNS server. To do this, they
need the hostname of the DHCP requester.
If CONFIG_BOOTP_SEND_HOSTNAME is defined, the content
of the "hostname" environment variable is passed as
option 12 to the DHCP server.
CONFIG_BOOTP_DHCP_REQUEST_DELAY
A 32bit value in microseconds for a delay between
receiving a "DHCP Offer" and sending the "DHCP Request".
This fixes a problem with certain DHCP servers that don't
respond 100% of the time to a "DHCP request". E.g. On an
AT91RM9200 processor running at 180MHz, this delay needed
to be *at least* 15,000 usec before a Windows Server 2003
DHCP server would reply 100% of the time. I recommend at
least 50,000 usec to be safe. The alternative is to hope
that one of the retries will be successful but note that
the DHCP timeout and retry process takes a longer than
this delay.
推荐值为 50000
- CDP Options:
CONFIG_CDP_DEVICE_ID
The device id used in CDP trigger frames.
CONFIG_CDP_DEVICE_ID_PREFIX
A two character string which is prefixed to the MAC address
of the device.
CONFIG_CDP_PORT_ID
A printf format string which contains the ascii name of
the port. Normally is set to "eth%d" which sets
eth0 for the first Ethernet, eth1 for the second etc.
CONFIG_CDP_CAPABILITIES
A 32bit integer which indicates the device capabilities;
0x00000010 for a normal host which does not forwards.
CONFIG_CDP_VERSION
An ascii string containing the version of the software.
CONFIG_CDP_PLATFORM.
An ascii string containing the name of the platform.
CONFIG_CDP_TRIGGER
A 32bit integer sent on the trigger.
CONFIG_CDP_POWER_CONSUMPTION
A 16bit integer containing the power consumption of the
device in .1 of milliwatts.
CONFIG_CDP_APPLIANCE_VLAN_TYPE
A byte containing the id of the VLAN.
- Status LED:
- 状态 LED
CONFIG_STATUS_LED
Several configurations allow to display the current
status using a LED. For instance, the LED will blink
fast while running U-Boot code, stop blinking as
soon as a reply to a BOOTP request was received, and
start blinking slow once the Linux kernel is running
(supported by a status LED driver in the Linux
kernel). Defining CONFIG_STATUS_LED enables this
feature in U-Boot.
- CAN Support:
- CAN 总线支持
CONFIG_CAN_DRIVER
Defining CONFIG_CAN_DRIVER enables CAN driver support
on those systems that support this (optional)
feature, like the TQM8xxL modules.
- I2C Support:
- I2C 支持
CONFIG_HARD_I2C | CONFIG_SOFT_I2C
These enable I2C serial bus commands. Defining either of
(but not both of) CONFIG_HARD_I2C or CONFIG_SOFT_I2C will
include the appropriate I2C driver for the selected CPU.
定义这两项将允许 I2C 串行总线命令。配置这两项将包含相应的驱动
This will allow you to use i2c commands at the u-boot
command line (as long as you set CONFIG_CMD_I2C in
CONFIG_COMMANDS) and communicate with i2c based realtime
clock chips. See common/cmd_i2c.c for a description of the
command line interface.
CONFIG_I2C_CMD_TREE is a recommended option that places
all I2C commands under a single 'i2c' root command. The
older 'imm', 'imd', 'iprobe' etc. commands are considered
deprecated and may disappear in the future.
CONFIG_HARD_I2C selects a hardware I2C controller.
CONFIG_SOFT_I2C configures u-boot to use a software (aka
bit-banging) driver instead of CPM or similar hardware
support for I2C.
There are several other quantities that must also be
defined when you define CONFIG_HARD_I2C or CONFIG_SOFT_I2C.
In both cases you will need to define CFG_I2C_SPEED
to be the frequency (in Hz) at which you wish your i2c bus
to run and CFG_I2C_SLAVE to be the address of this node (ie
the CPU's i2c node address).
Now, the u-boot i2c code for the mpc8xx (cpu/mpc8xx/i2c.c)
sets the CPU up as a master node and so its address should
therefore be cleared to 0 (See, eg, MPC823e User's Manual
p.16-473). So, set CFG_I2C_SLAVE to 0.
That's all that's required for CONFIG_HARD_I2C.
If you use the software i2c interface (CONFIG_SOFT_I2C)
then the following macros need to be defined (examples are
from include/configs/lwmon.h ):
若用软件 I2C 接口,则下面的宏应被定义
I2C_INIT
(Optional). Any commands necessary to enable the I2C
controller or configure ports.
eg: #define I2C_INIT (immr->im_cpm.cp_pbdir |= PB_SCL)
I2C_PORT
(Only for MPC8260 CPU). The I/O port to use (the code
assumes both bits are on the same port). Valid values
are 0..3 for port