Directory Hierarchy:
====================
-- board Board dependend files
-- common Misc architecture independend functions
+- board Board dependent files
+- common Misc architecture independent functions
- cpu CPU specific files
- disk Code for disk drive partition handling
- doc Documentation (don't expect too much)
-- drivers Common used device drivers
+- drivers Commonly used device drivers
- dtt Digital Thermometer and Thermostat drivers
- examples Example code for standalone applications, etc.
- include Header Files
- tools Tools to build S-Record or U-Boot images, etc.
- cpu/74xx_7xx Files specific to Motorola MPC74xx and 7xx CPUs
+- cpu/arm925t Files specific to ARM 925 CPUs
+- cpu/arm926ejs Files specific to ARM 926 CPUs
- cpu/mpc5xx Files specific to Motorola MPC5xx CPUs
- cpu/mpc8xx Files specific to Motorola MPC8xx CPUs
- cpu/mpc824x Files specific to Motorola MPC824x CPUs
- cpu/mpc8260 Files specific to Motorola MPC8260 CPU
+- cpu/mpc85xx Files specific to Motorola MPC85xx CPUs
- cpu/ppc4xx Files specific to IBM 4xx CPUs
+
- board/LEOX/ Files specific to boards manufactured by The LEOX team
- board/LEOX/elpt860 Files specific to ELPT860 boards
- board/RPXClassic
- board/lwmon Files specific to LWMON boards
- board/mbx8xx Files specific to MBX boards
- board/mpc8260ads
- Files specific to MMPC8260ADS boards
+ Files specific to MPC8260ADS and PQ2FADS-ZU boards
+- board/mpc8540ads
+ Files specific to MPC8540ADS boards
+- board/mpc8560ads
+ Files specific to MPC8560ADS boards
- board/mpl/ Files specific to boards manufactured by MPL
- board/mpl/common Common files for MPL boards
- board/mpl/pip405 Files specific to PIP405 boards
- board/mpl/mip405 Files specific to MIP405 boards
+- board/mpl/vcma9 Files specific to VCMA9 boards
- board/musenki Files specific to MUSEKNI boards
- board/mvs1 Files specific to MVS1 boards
- board/nx823 Files specific to NX823 boards
- board/oxc Files specific to OXC boards
+- board/omap1510inn
+ Files specific to OMAP 1510 Innovator boards
+- board/omap1610inn
+ Files specific to OMAP 1610 Innovator boards
- board/pcippc2 Files specific to PCIPPC2/PCIPPC6 boards
- board/pm826 Files specific to PM826 boards
- board/ppmc8260
- board/westel/ Files specific to boards manufactured by Westel Wireless
- board/westel/amx860 Files specific to AMX860 boards
- board/utx8245 Files specific to UTX8245 boards
+- board/zpc1900 Files specific to Zephyr Engineering ZPC.1900 board
Software Configuration:
=======================
CONFIG_MPC823, CONFIG_MPC850, CONFIG_MPC855, CONFIG_MPC860
or CONFIG_MPC5xx
or CONFIG_MPC824X, CONFIG_MPC8260
+ or CONFIG_MPC85xx
or CONFIG_IOP480
or CONFIG_405GP
+ or CONFIG_405EP
or CONFIG_440
or CONFIG_MPC74xx
or CONFIG_750FX
CONFIG_IAD210, CONFIG_RPXlite, CONFIG_sbc8260,
CONFIG_EBONY, CONFIG_sacsng, CONFIG_FPS860L,
CONFIG_V37, CONFIG_ELPT860, CONFIG_CMI,
- CONFIG_NETVIA, CONFIG_RBC823
+ CONFIG_NETVIA, CONFIG_RBC823, CONFIG_ZPC1900,
+ CONFIG_MPC8540ADS, CONFIG_MPC8560ADS
ARM based boards:
-----------------
CONFIG_HHP_CRADLE, CONFIG_DNP1110, CONFIG_EP7312,
CONFIG_IMPA7, CONFIG_LART, CONFIG_LUBBOCK,
+ CONFIG_INNOVATOROMAP1510, CONFIG_INNOVATOROMAP1610
CONFIG_SHANNON, CONFIG_SMDK2400, CONFIG_SMDK2410,
- CONFIG_TRAB, CONFIG_AT91RM9200DK
+ CONFIG_TRAB, CONFIG_VCMA9, CONFIG_AT91RM9200DK
- CPU Module Type: (if CONFIG_COGENT is defined)
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 (untested)
+ CFG_PQ2FADS - PQ2FADS-ZU or PQ2FADS-VR
+
+
- MPC824X Family Member (if CONFIG_MPC824X is defined)
- Define exactly one of
- CONFIG_MPC8240, CONFIG_MPC8245
+ Define exactly one of
+ CONFIG_MPC8240, CONFIG_MPC8245
- 8xx CPU Options: (if using an 8xx cpu)
Define one or more of
- CONFIG_8xx_GCLK_FREQ - if get_gclk_freq() can not work e.g.
- no 32KHz reference PIT/RTC clock
+ CONFIG_8xx_GCLK_FREQ - if get_gclk_freq() cannot work
+ e.g. if there is no 32KHz
+ reference PIT/RTC clock
-- Clock Interface:
+- Linux Kernel Interface:
CONFIG_CLOCKS_IN_MHZ
U-Boot stores all clock information in Hz
"clocks_in_mhz" can be defined so that U-Boot
converts clock data to MHZ before passing it to the
Linux kernel.
-
When CONFIG_CLOCKS_IN_MHZ is defined, a definition of
"clocks_in_mhz=1" is automatically included in the
default environment.
+ CONFIG_MEMSIZE_IN_BYTES [relevant for MIPS only]
+
+ When transfering 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.
+
- Console Interface:
Depending on board, define exactly one serial port
(like CONFIG_8xx_CONS_SMC1, CONFIG_8xx_CONS_SMC2,
default 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. See
+ doc/README.silent for more information.
+
- Console Baudrate:
CONFIG_BAUDRATE - in bps
Select one of the baudrates listed in
#define enables commands:
-------------------------
CFG_CMD_ASKENV * ask for env variable
+ CFG_CMD_AUTOSCRIPT Autoscript Support
CFG_CMD_BDI bdinfo
CFG_CMD_BEDBUG Include BedBug Debugger
+ CFG_CMD_BMP * BMP support
CFG_CMD_BOOTD bootd
CFG_CMD_CACHE icache, dcache
CFG_CMD_CONSOLE coninfo
CFG_CMD_DATE * support for RTC, date/time...
CFG_CMD_DHCP DHCP support
+ CFG_CMD_DIAG * Diagnostics
+ CFG_CMD_DOC * Disk-On-Chip Support
+ CFG_CMD_DTT Digital Therm and Thermostat
CFG_CMD_ECHO * echo arguments
CFG_CMD_EEPROM * EEPROM read/write support
CFG_CMD_ELF bootelf, bootvx
CFG_CMD_FDOS * Dos diskette Support
CFG_CMD_FLASH flinfo, erase, protect
CFG_CMD_FPGA FPGA device initialization support
+ CFG_CMD_HWFLOW * RTS/CTS hw flow control
CFG_CMD_I2C * I2C serial bus support
CFG_CMD_IDE * IDE harddisk support
CFG_CMD_IMI iminfo
+ CFG_CMD_IMLS List all found images
CFG_CMD_IMMAP * IMMR dump support
CFG_CMD_IRQ * irqinfo
+ CFG_CMD_JFFS2 * JFFS2 Support
CFG_CMD_KGDB * kgdb
CFG_CMD_LOADB loadb
CFG_CMD_LOADS loads
CFG_CMD_MEMORY md, mm, nm, mw, cp, cmp, crc, base,
loop, mtest
+ CFG_CMD_MISC Misc functions like sleep etc
CFG_CMD_MMC MMC memory mapped support
CFG_CMD_MII MII utility commands
+ CFG_CMD_NAND * NAND support
CFG_CMD_NET bootp, tftpboot, rarpboot
CFG_CMD_PCI * pciinfo
CFG_CMD_PCMCIA * PCMCIA support
+ CFG_CMD_PING * send ICMP ECHO_REQUEST to network host
+ CFG_CMD_PORTIO Port I/O
CFG_CMD_REGINFO * Register dump
CFG_CMD_RUN run command in env variable
+ CFG_CMD_SAVES save S record dump
CFG_CMD_SCSI * SCSI Support
+ CFG_CMD_SDRAM * print SDRAM configuration information
CFG_CMD_SETGETDCR Support for DCR Register access (4xx only)
CFG_CMD_SPI * SPI serial bus support
CFG_CMD_USB * USB support
+ CFG_CMD_VFD * VFD support (TRAB)
CFG_CMD_BSP * Board SPecific functions
-----------------------------------------------
CFG_CMD_ALL all
- Watchdog:
CONFIG_WATCHDOG
If this variable is defined, it enables watchdog
- support. There must support in the platform specific
+ support. 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.
CONFIG_RTC_DS1338 - use Maxim, Inc. DS1338 RTC
CONFIG_RTC_DS164x - use Dallas DS164x RTC
+ Note that if the RTC uses I2C, then the I2C interface
+ must also be configured. See I2C Support, below.
+
- Timestamp Support:
When CONFIG_TIMESTAMP is selected, the timestamp
display); also select one of the supported displays
by defining one of these:
- CONFIG_NEC_NL6648AC33:
+ CONFIG_NEC_NL6448AC33:
- NEC NL6648AC33-18. Active, color, single scan.
+ NEC NL6448AC33-18. Active, color, single scan.
- CONFIG_NEC_NL6648BC20
+ CONFIG_NEC_NL6448BC20
- NEC NL6648BC20-08. 6.5", 640x480.
+ 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
Normally display is black on white background; define
CFG_WHITE_ON_BLACK to get it inverted.
-- Spash Screen Support: CONFIG_SPLASH_SCREEN
+- Splash Screen Support: CONFIG_SPLASH_SCREEN
If this option is set, the environment is checked for
a variable "splashimage". If found, the usual display
allows for a "silent" boot where a splash screen is
loaded very quickly after power-on.
+- Compression support:
+ CONFIG_BZIP2
+
+ If this option is set, support for bzip2 compressed
+ images is included. If not, only uncompressed and gzip
+ compressed images are supported.
+
+ NOTE: the bzip2 algorithm requires a lot of RAM, so
+ the malloc area (as defined by CFG_MALLOC_LEN) should
+ be at least 4MB.
- Ethernet address:
CONFIG_ETHADDR
4th and following
BOOTP requests: delay 0 ... 8 sec
+- DHCP Advanced Options:
+ CONFIG_BOOTP_MASK
+
+ You can fine tune the DHCP functionality by adding
+ these flags to the CONFIG_BOOTP_MASK define:
+
+ 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 added to the CONFIG_BOOTP_MASK.
+
+ 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_BOOP_SEND_HOSTNAME is added to the
+ CONFIG_BOOTP_MASK, the content of the "hostname"
+ environment variable is passed as option 12 to
+ the DHCP server.
+
- Status LED: CONFIG_STATUS_LED
Several configurations allow to display the current
- I2C Support: CONFIG_HARD_I2C | CONFIG_SOFT_I2C
- Enables I2C serial bus commands. If this is selected,
- either CONFIG_HARD_I2C or CONFIG_SOFT_I2C must be defined
- to include the appropriate I2C driver.
+ 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.
- See also: common/cmd_i2c.c for a description of the
+ This will allow you to use i2c commands at the u-boot
+ command line (as long as you set CFG_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_HARD_I2C selects the CPM hardware driver for I2C.
+
+ 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.
- CONFIG_HARD_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).
- Selects the CPM hardware driver for I2C.
+ 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.
- CONFIG_SOFT_I2C
+ That's all that's required for CONFIG_HARD_I2C.
- Use software (aka bit-banging) driver instead of CPM
- or similar hardware support for I2C. This is configured
- via the following defines.
+ 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):
I2C_INIT
- (Optional). Any commands necessary to enable I2C
+ (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
(driven). If the data line is open collector, this
define can be null.
+ eg: #define I2C_ACTIVE (immr->im_cpm.cp_pbdir |= PB_SDA)
+
I2C_TRISTATE
The code necessary to make the I2C data line tri-stated
(inactive). If the data line is open collector, this
define can be null.
+ eg: #define I2C_TRISTATE (immr->im_cpm.cp_pbdir &= ~PB_SDA)
+
I2C_READ
Code that returns TRUE if the I2C data line is high,
FALSE if it is low.
+ eg: #define I2C_READ ((immr->im_cpm.cp_pbdat & PB_SDA) != 0)
+
I2C_SDA(bit)
If <bit> is TRUE, sets the I2C data line high. If it
is FALSE, it clears it (low).
+ eg: #define I2C_SDA(bit) \
+ if(bit) immr->im_cpm.cp_pbdat |= PB_SDA; \
+ else immr->im_cpm.cp_pbdat &= ~PB_SDA
+
I2C_SCL(bit)
If <bit> is TRUE, sets the I2C clock line high. If it
is FALSE, it clears it (low).
+ eg: #define I2C_SCL(bit) \
+ if(bit) immr->im_cpm.cp_pbdat |= PB_SCL; \
+ else immr->im_cpm.cp_pbdat &= ~PB_SCL
+
I2C_DELAY
This delay is invoked four times per clock cycle so this
controls the rate of data transfer. The data rate thus
- is 1 / (I2C_DELAY * 4).
+ is 1 / (I2C_DELAY * 4). Often defined to be something
+ like:
+
+ #define I2C_DELAY udelay(2)
CFG_I2C_INIT_BOARD
U-Boot considers the values of the environment
variables "serial#" (Board Serial Number) and
- "ethaddr" (Ethernet Address) to bb parameters that
+ "ethaddr" (Ethernet Address) to be parameters that
are set once by the board vendor / manufacturer, and
protects these variables from casual modification by
the user. Once set, these variables are read-only,
Define this to contain any number of null terminated
strings (variable = value pairs) that will be part of
- the default enviroment compiled into the boot image.
+ the default environment compiled into the boot image.
For example, place something like this in your
board's config file:
internal format how the environment is stored by the
U-Boot code. This is NOT an official, exported
interface! Although it is unlikely that this format
- will change soon, but there is no guarantee either.
+ will change soon, there is no guarantee either.
You better know what you are doing here.
Note: overly (ab)use of the default environment is
-1 common/cmd_ide.c Read Error on boot device
-1 common/cmd_ide.c Image header has bad magic number
- -1 common/cmd_nvedit.c Environment not changable, but has bad CRC
+ -1 common/cmd_nand.c Bad usage of "nand" command
+ -1 common/cmd_nand.c No boot device
+ -1 common/cmd_nand.c Unknown Chip ID on boot device
+ -1 common/cmd_nand.c Read Error on boot device
+ -1 common/cmd_nand.c Image header has bad magic number
+
+ -1 common/env_common.c Environment has a bad CRC, using default
Modem Support:
- CFG_ALT_MEMTEST:
Enable an alternate, more extensive memory test.
+- CFG_MEMTEST_SCRATCH:
+ Scratch address used by the alternate memory test
+ You only need to set this if address zero isn't writeable
+
- CFG_TFTP_LOADADDR:
Default load address for network file downloads
- CFG_FLASH_WRITE_TOUT:
Timeout for Flash write operations (in ms)
+- CFG_FLASH_LOCK_TOUT
+ Timeout for Flash set sector lock bit operation (in ms)
+
+- CFG_FLASH_UNLOCK_TOUT
+ Timeout for Flash clear lock bits operation (in ms)
+
+- CFG_FLASH_PROTECTION
+ If defined, hardware flash sectors protection is used
+ instead of U-Boot software protection.
+
- CFG_DIRECT_FLASH_TFTP:
Enable TFTP transfers directly to flash memory;
the default environment is used; a new CRC is computed as soon as you
use the "saveenv" command to store a valid environment.
+- CFG_FAULT_ECHO_LINK_DOWN:
+ Echo the inverted Ethernet link state to the fault LED.
+
+ Note: If this option is active, then CFG_FAULT_MII_ADDR
+ also needs to be defined.
+
+- CFG_FAULT_MII_ADDR:
+ MII address of the PHY to check for the Ethernet link state.
Low Level (hardware related) configuration options:
---------------------------------------------------
- CFG_DEFAULT_IMMR:
Default address of the IMMR after system reset.
- Needed on some 8260 systems (MPC8260ADS and RPXsuper)
- to be able to adjust the position of the IMMR
- register after a reset.
+
+ Needed on some 8260 systems (MPC8260ADS, PQ2FADS-ZU,
+ and RPXsuper) to be able to adjust the position of
+ the IMMR register after a reset.
- Floppy Disk Support:
CFG_FDC_DRIVE_NUMBER
- CFG_INIT_RAM_ADDR:
- Start address of memory area tha can be used for
+ Start address of memory area that can be used for
initial data and stack; please note that this must be
writable memory that is working WITHOUT special
initialization, i. e. you CANNOT use normal RAM which
GENIETV_config TQM823L_config PIP405_config
GEN860T_config EBONY_config FPS860L_config
ELPT860_config cmi_mpc5xx_config NETVIA_config
- at91rm9200dk_config
+ at91rm9200dk_config omap1510inn_config MPC8260ADS_config
+ omap1610inn_config ZPC1900_config MPC8540ADS_config
+ MPC8560ADS_config
Note: for some board special configuration names may exist; check if
additional information is available from the board vendor; for
Finally, type "make all", and you should get some working U-Boot
-images ready for downlod to / installation on your system:
+images ready for download to / installation on your system:
- "u-boot.bin" is a raw binary image
- "u-boot" is an image in ELF binary format
1. Add a new configuration option for your board to the toplevel
"Makefile" and to the "MAKEALL" script, using the existing
entries as examples. Note that here and at many other places
- boards and other names are listed alphabetically sorted. Please
+ boards and other names are listed in alphabetical sort order. Please
keep this order.
2. Create a new directory to hold your board specific code. Add any
files you need. In your board directory, you will need at least
the supported boards compile WITHOUT ANY compiler warnings. To do so,
just run the "MAKEALL" script, which will configure and build U-Boot
for ALL supported system. Be warned, this will take a while. You can
-select which (cross) compiler to use py passing a `CROSS_COMPILE'
+select which (cross) compiler to use by passing a `CROSS_COMPILE'
environment variable to the script, i. e. to use the cross tools from
MontaVista's Hard Hat Linux you can type
does not overwrite the U-Boot stack and data).
For instance, when you have a system with 16 MB
- RAM, and want to reseve 4 MB from use by Linux,
+ RAM, and want to reserve 4 MB from use by Linux,
you can do this by adding "mem=12M" to the value of
the "bootargs" variable. However, now you must make
- sure, that the initrd image is placed in the first
+ sure that the initrd image is placed in the first
12 MB as well - this can be done with
setenv initrd_high 00c00000
bootfile - see above
dnsip - IP address of your Domain Name Server
+ dnsip2 - IP address of your secondary Domain Name Server
gatewayip - IP address of the Gateway (Router) to use
hostname - Target hostname
ipaddr - see above
Command Line Parsing:
=====================
-There are two different command line parsers available with U-Boot:
-the old "simple" one, and the much more pwerful "hush" shell:
+There are two different command line parsers available with U-Boot:
+the old "simple" one, and the much more powerful "hush" shell:
Old, simple command line parser:
--------------------------------
Note for Redundant Ethernet Interfaces:
=======================================
-Some boards come with redundand ethernet interfaces; U-Boot supports
+Some boards come with redundant ethernet interfaces; U-Boot supports
such configurations and is capable of automatic selection of a
-"working" interface when needed. MAC assignemnt works as follows:
+"working" interface when needed. MAC assignment works as follows:
Network interfaces are numbered eth0, eth1, eth2, ... Corresponding
MAC addresses can be stored in the environment as "ethaddr" (=>eth0),
* Target Operating System (Provisions for OpenBSD, NetBSD, FreeBSD,
4.4BSD, Linux, SVR4, Esix, Solaris, Irix, SCO, Dell, NCR, VxWorks,
LynxOS, pSOS, QNX, RTEMS, ARTOS;
- Currently supported: Linux, NetBSD, VxWorks, QNX, RTEMS, ARTOS).
+ Currently supported: Linux, NetBSD, VxWorks, QNX, RTEMS, ARTOS, LynxOS).
* Target CPU Architecture (Provisions for Alpha, ARM, Intel x86,
- IA64, MIPS, MIPS, PowerPC, IBM S390, SuperH, Sparc, Sparc 64 Bit;
- Currently supported: PowerPC).
-* Compression Type (Provisions for uncompressed, gzip, bzip2;
- Currently supported: uncompressed, gzip).
+ IA64, MIPS, NIOS, PowerPC, IBM S390, SuperH, Sparc, Sparc 64 Bit;
+ Currently supported: ARM, Intel x86, MIPS, NIOS, PowerPC).
+* Compression Type (uncompressed, gzip, bzip2)
* Load Address
* Entry Point
* Image Name
==============
Although U-Boot should support any OS or standalone application
-easily, Linux has always been in the focus during the design of
+easily, the main focus has always been on Linux during the design of
U-Boot.
U-Boot includes many features that so far have been part of some
special "boot loader" code within the Linux kernel. Also, any
"initrd" images to be used are no longer part of one big Linux image;
instead, kernel and "initrd" are separate images. This implementation
-serves serveral purposes:
+serves several purposes:
- the same features can be used for other OS or standalone
applications (for instance: using compressed images to reduce the
Flash memory footprint)
- it becomes much easier to port new Linux kernel versions because
- lots of low-level, hardware dependend stuff are done by U-Boot
+ lots of low-level, hardware dependent stuff are done by U-Boot
- the same Linux kernel image can now be used with different "initrd"
images; of course this also means that different kernel images can
...
If you want to boot a Linux kernel with initial ram disk, you pass
-the memory addreses of both the kernel and the initrd image (PPBCOOT
+the memory addresses of both the kernel and the initrd image (PPBCOOT
format!) to the "bootm" command:
=> imi 40100000 40200000
Minicom warning:
================
-Over time, many people have reported problems when trying to used the
+Over time, many people have reported problems when trying to use the
"minicom" terminal emulation program for serial download. I (wd)
consider minicom to be broken, and recommend not to use it. Under
Unix, I recommend to use C-Kermit for general purpose use (and
MPC826x processors), on others (parts of) the data cache can be
locked as (mis-) used as memory, etc.
- Chris Hallinan posted a good summy of these issues to the
+ Chris Hallinan posted a good summary of these issues to the
u-boot-users mailing list:
Subject: RE: [U-Boot-Users] RE: More On Memory Bank x (nothingness)?
* Do not use any unitialized global data (or implicitely initialized
as zero data - BSS segment) at all - this is undefined, initiali-
- zation is performed later (when relocationg to RAM).
+ zation is performed later (when relocating to RAM).
-* Stack space is very limited. Avoid big data buffers or things like
+* Stack space is very limited. Avoid big data buffers or things like
that.
Having only the stack as writable memory limits means we cannot use
place a pointer (gd) to the global data into a register which we
reserve for this purpose.
-When chosing a register for such a purpose we are restricted by the
+When choosing a register for such a purpose we are restricted by the
relevant (E)ABI specifications for the current architecture, and by
GCC's implementation.
In the reset configuration, U-Boot starts at the reset entry point
(on most PowerPC systens at address 0x00000100). Because of the reset
configuration for CS0# this is a mirror of the onboard Flash memory.
-To be able to re-map memory U-Boot then jumps to it's link address.
+To be able to re-map memory U-Boot then jumps to its link address.
To be able to implement the initialization code in C, a (small!)
initial stack is set up in the internal Dual Ported RAM (in case CPUs
which provide such a feature like MPC8xx or MPC8260), or in a locked
banks.
When there is more than one SDRAM bank, and the banks are of
-different size, the larger is mapped first. For equal size, the first
+different size, the largest is mapped first. For equal size, the first
bank (CS2#) is mapped first. The first mapping is always for address
0x00000000, with any additional banks following immediately to create
contiguous memory starting from 0.
version of diff does not support these options, then get the latest
version of GNU diff.
+ The current directory when running this command shall be the top
+ level directory of the U-Boot source tree, or it's parent directory
+ (i. e. please make sure that your patch includes sufficient
+ directory information for the affected files).
+
We accept patches as plain text, MIME attachments or as uuencoded
gzipped text.
projects / people / ms / u-boot.git / blobdiff