at91
所属分类:处理器开发
开发工具:C/C++
文件大小:9181KB
下载次数:104
上传日期:2005-11-28 21:47:37
上 传 者:
万两
说明: Atmel 91系列ARM的boot loader启动代码
(Atmel ARM boot loader boot code)
文件列表:
at91\boot\asm (99975, 2004-04-11)
at91\boot\asm.new (83456, 2004-04-11)
at91\boot\asm_isr.S (2793, 2004-04-11)
at91\boot\binary\loader.bin (6824, 2004-04-11)
at91\boot\binary (0, 2004-09-16)
at91\boot\crt0.S (566, 2004-04-11)
at91\boot\CVS\Entries (695, 2004-04-11)
at91\boot\CVS\Repository (26, 2004-04-11)
at91\boot\CVS\Root (60, 2004-04-11)
at91\boot\CVS (0, 2004-09-16)
at91\boot\div0.c (982, 2004-04-11)
at91\boot\entry.S (3777, 2004-04-11)
at91\boot\include\AT91C_SPI_DataFlash.h (5673, 2004-04-11)
at91\boot\include\at91lib_version.h (953, 2004-04-11)
at91\boot\include\AT91RM9200.h (208101, 2004-04-11)
at91\boot\include\at91rm9200dk.h (938, 2004-04-11)
at91\boot\include\com.h (1645, 2004-04-11)
at91\boot\include\crc.h (1996, 2004-04-11)
at91\boot\include\CVS\Entries (1720, 2004-04-11)
at91\boot\include\CVS\Repository (34, 2004-04-11)
at91\boot\include\CVS\Root (60, 2004-04-11)
at91\boot\include\CVS (0, 2004-09-16)
at91\boot\include\dataflash.h (4932, 2004-04-11)
at91\boot\include\Download.h (1040, 2004-04-11)
at91\boot\include\eeprom.h (1662, 2004-04-11)
at91\boot\include\embedded_services.h (30109, 2004-04-11)
at91\boot\include\inflate.h (36606, 2004-04-11)
at91\boot\include\lib_debug.h (1292, 2004-04-11)
at91\boot\include\lib_main.h (4109, 2004-04-11)
at91\boot\include\main.h (1922, 2004-04-11)
at91\boot\include\obj_buffer.h (3552, 2004-04-11)
at91\boot\include\obj_dfudesc.c (22075, 2004-04-11)
at91\boot\include\obj_dfudesc.h (8516, 2004-04-11)
at91\boot\include\obj_pipe.c (9481, 2004-04-11)
at91\boot\include\obj_pipe.h (5011, 2004-04-11)
at91\boot\include\obj_romboot.c (2702, 2004-04-11)
at91\boot\include\obj_romboot.h (2766, 2004-04-11)
at91\boot\include\obj_sbuffer.c (11152, 2004-04-11)
at91\boot\include\obj_sbuffer.h (3127, 2004-04-11)
at91\boot\include\obj_svccomm.h (2453, 2004-04-11)
... ...
#
# (C) Copyright 2000 - 2004
# Wolfgang Denk, DENX Software Engineering, wd@denx.de.
#
# See file CREDITS for list of people who contributed to this
# project.
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License as
# published by the Free Software Foundation; either version 2 of
# the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston,
# MA 02111-1307 USA
#
Summary:
========
This directory contains the source code for U-Boot, a boot loader for
Embedded boards based on PowerPC and ARM processors, which can be
installed in a boot ROM and used to initialize and test the hardware
or to download and run application code.
The development of U-Boot is closely related to Linux: some parts of
the source code originate in the Linux source tree, we have some
header files in common, and special provision has been made to
support booting of Linux images.
Some attention has been paid to make this software easily
configurable and extendable. For instance, all monitor commands are
implemented with the same call interface, so that it's very easy to
add new commands. Also, instead of permanently adding rarely used
code (for instance hardware test utilities) to the monitor, you can
load and run it dynamically.
Status:
=======
In general, all boards for which a configuration option exists in the
Makefile have been tested to some extent and can be considered
"working". In fact, many of them are used in production systems.
In case of problems see the CHANGELOG and CREDITS files to find out
who contributed the specific port.
Where to get help:
==================
In case you have questions about, problems with or contributions for
U-Boot you should send a message to the U-Boot mailing list at
. There is also an archive of
previous traffic on the mailing list - please search the archive
before asking FAQ's. Please see
http://lists.sourceforge.net/lists/listinfo/u-boot-users/
Where we come from:
===================
- start from 8xxrom sources
- create PPCBoot project (http://sourceforge.net/projects/ppcboot)
- clean up code
- make it easier to add custom boards
- make it possible to add other [PowerPC] CPUs
- extend functions, especially:
* Provide extended interface to Linux boot loader
* S-Record download
* network boot
* PCMCIA / CompactFLash / ATA disk / SCSI ... boot
- create ARMBoot project (http://sourceforge.net/projects/armboot)
- add other CPU families (starting with ARM)
- create U-Boot project (http://sourceforge.net/projects/u-boot)
Names and Spelling:
===================
The "official" name of this project is "Das U-Boot". The spelling
"U-Boot" shall be used in all written text (documentation, comments
in source files etc.). Example:
This is the README file for the U-Boot project.
File names etc. shall be based on the string "u-boot". Examples:
include/asm-ppc/u-boot.h
#include
Variable names, preprocessor constants etc. shall be either based on
the string "u_boot" or on "U_BOOT". Example:
U_BOOT_VERSION u_boot_logo
IH_OS_U_BOOT u_boot_hush_start
Versioning:
===========
U-Boot uses a 3 level version number containing a version, a
sub-version, and a patchlevel: "U-Boot-2.34.5" means version "2",
sub-version "34", and patchlevel "4".
The patchlevel is used to indicate certain stages of development
between released versions, i. e. officially released versions of
U-Boot will always have a patchlevel of "0".
Directory Hierarchy:
====================
- board Board dependent files
- common Misc architecture independent functions
- cpu CPU specific files
- 74xx_7xx Files specific to Motorola MPC74xx and 7xx CPUs
- arm720t Files specific to ARM 720 CPUs
- arm920t Files specific to ARM 920 CPUs
- arm925t Files specific to ARM 925 CPUs
- arm926ejs Files specific to ARM 926 CPUs
- at91rm9200 Files specific to Atmel AT91RM9200 CPUs
- i386 Files specific to i386 CPUs
- ixp Files specific to Intel XScale IXP CPUs
- mcf52x2 Files specific to Motorola ColdFire MCF52x2 CPUs
- mips Files specific to MIPS CPUs
- mpc5xx Files specific to Motorola MPC5xx CPUs
- mpc5xxx Files specific to Motorola MPC5xxx CPUs
- mpc8xx Files specific to Motorola MPC8xx CPUs
- mpc824x Files specific to Motorola MPC824x CPUs
- mpc8260 Files specific to Motorola MPC8260 CPUs
- mpc85xx Files specific to Motorola MPC85xx CPUs
- nios Files specific to Altera NIOS CPUs
- ppc4xx Files specific to IBM 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
- doc Documentation (don't expect too much)
- drivers Commonly used device drivers
- dtt Digital Thermometer and Thermostat drivers
- examples Example code for standalone applications, etc.
- include Header Files
- lib_arm Files generic to ARM architecture
- lib_generic Files generic to all architectures
- 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
- net Networking code
- post Power On Self Test
- rtc Real Time Clock drivers
- tools Tools to build S-Record or U-Boot images, etc.
Software Configuration:
=======================
Configuration is usually done using C preprocessor defines; the
rationale behind that is to avoid dead code whenever possible.
There are two classes of configuration variables:
* Configuration _OPTIONS_:
These are selectable by the user and have names beginning with
"CONFIG_".
* Configuration _SETTINGS_:
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_".
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.
Selection of Processor Architecture and Board Type:
---------------------------------------------------
For all supported boards there are ready-to-use default
configurations available; just type "make _config".
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.
Configuration Options:
----------------------
Configuration depends on the combination of board and CPU type; all
such information is kept in a configuration file
"include/configs/.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:
- CPU Type: Define exactly one of
PowerPC based CPUs:
-------------------
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
ARM based CPUs:
---------------
CONFIG_SA1110
CONFIG_ARM7
CONFIG_PXA250
- Board Type: Define exactly one of
PowerPC based boards:
---------------------
CONFIG_ADCIOP, CONFIG_ICU862 CONFIG_RPXsuper,
CONFIG_ADS860, CONFIG_IP860, CONFIG_SM850,
CONFIG_AMX860, CONFIG_IPHASE4539, CONFIG_SPD823TS,
CONFIG_AR405, CONFIG_IVML24, CONFIG_SXNI855T,
CONFIG_BAB7xx, CONFIG_IVML24_128, CONFIG_Sandpoint8240,
CONFIG_CANBT, CONFIG_IVML24_256, CONFIG_Sandpoint8245,
CONFIG_CCM, CONFIG_IVMS8, CONFIG_TQM823L,
CONFIG_CPCI405, CONFIG_IVMS8_128, CONFIG_TQM850L,
CONFIG_CPCI4052, CONFIG_IVMS8_256, CONFIG_TQM855L,
CONFIG_CPCIISER4, CONFIG_LANTEC, CONFIG_TQM860L,
CONFIG_CPU86, CONFIG_MBX, CONFIG_TQM8260,
CONFIG_CRAYL1, CONFIG_MBX860T, CONFIG_TTTech,
CONFIG_CU824, CONFIG_MHPC, CONFIG_UTX8245,
CONFIG_DASA_SIM, CONFIG_MIP405, CONFIG_W7OLMC,
CONFIG_DU405, CONFIG_MOUSSE, CONFIG_W7OLMG,
CONFIG_ELPPC, CONFIG_MPC8260ADS, CONFIG_WALNUT405,
CONFIG_ERIC, CONFIG_MUSENKI, CONFIG_ZUMA,
CONFIG_ESTEEM192E, CONFIG_MVS1, CONFIG_c2mon,
CONFIG_ETX094, CONFIG_NX823, CONFIG_cogent_mpc8260,
CONFIG_EVB***260, CONFIG_OCRTC, CONFIG_cogent_mpc8xx,
CONFIG_FADS823, CONFIG_ORSG, CONFIG_ep8260,
CONFIG_FADS850SAR, CONFIG_OXC, CONFIG_gw8260,
CONFIG_FADS860T, CONFIG_PCI405, CONFIG_hermes,
CONFIG_FLAGADM, CONFIG_PCIPPC2, CONFIG_hymod,
CONFIG_FPS850L, CONFIG_PCIPPC6, CONFIG_lwmon,
CONFIG_GEN860T, CONFIG_PIP405, CONFIG_pcu_e,
CONFIG_GENIETV, CONFIG_PM826, CONFIG_ppmc8260,
CONFIG_GTH, CONFIG_RPXClassic, CONFIG_rsdproto,
CONFIG_IAD210, CONFIG_RPXlite, CONFIG_sbc8260,
CONFIG_EBONY, CONFIG_sacsng, CONFIG_FPS860L,
CONFIG_V37, CONFIG_ELPT860, CONFIG_CMI,
CONFIG_NETVIA, CONFIG_RBC823, CONFIG_ZPC1900,
CONFIG_MPC8540ADS, CONFIG_MPC8560ADS, CONFIG_QS850,
CONFIG_QS823, CONFIG_QS860T, CONFIG_DB***360,
CONFIG_DB***460, CONFIG_DUET_ADS
ARM based boards:
-----------------
CONFIG_HHP_CRADLE, CONFIG_DNP1110, CONFIG_EP7312,
CONFIG_IMPA7, CONFIG_LART, CONFIG_LUBBOCK,
CONFIG_INNOVATOROMAP1510, CONFIG_INNOVATOROMAP1610,
CONFIG_H2_OMAP1610, CONFIG_SHANNON, CONFIG_SMDK2400,
CONFIG_SMDK2410, CONFIG_TRAB, CONFIG_VCMA9,
CONFIG_AT91RM9200DK
- CPU Module Type: (if CONFIG_COGENT is defined)
Define exactly one of
CONFIG_CMA286_60_OLD
--- 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
- Motherboard I/O Modules: (if CONFIG_COGENT is defined)
Define one or more of
CONFIG_CMA302
- 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
- MPC824X Family Member (if CONFIG_MPC824X is defined)
Define exactly one of
CONFIG_MPC8240, CONFIG_MPC8245
- 8xx CPU Options: (if using an MPC8xx cpu)
Define one or more of
CONFIG_8xx_GCLK_FREQ - if get_gclk_freq() cannot work
e.g. if there is no 32KHz
reference PIT/RTC clock
- 859/866 CPU options: (if using a MPC859 or MPC866 CPU):
CFG_866_OSCCLK
CFG_866_CPUCLK_MIN
CFG_866_CPUCLK_MAX
CFG_866_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),
- Linux Kernel Interface:
CONFIG_CLOCKS_IN_MHZ
U-Boot stores all clock information in Hz
internally. For binary compatibility with older Linux
kernels (which expect the clocks passed in the
bd_info data to be in MHz) the environment variable
"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,
CONFIG_8xx_CONS_SCC1, ...), or switch off the serial
console by defining CONFIG_8xx_CONS_NONE
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. 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 CFG_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
addional board info beside
the logo
When CONFIG_CFB_CONSOLE is defined, video console is
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
CFG_BAUDRATE_TABLE, see below.
CFG_BRGCLK_PRESCALE, baudrate prescale
- Interrupt driven serial port input:
CONFIG_SERIAL_SOFTWARE_FIFO
PPC405GP only.
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:
CONFIG_UART1_CONSOLE
IBM PPC4xx only.
If defined internal UART1 (and not UART0) is used
as default U-Boot console.
- Boot Delay: CONFIG_BOOTDELAY - in seconds
Delay before automatically booting the default image;
set to -1 to disable autoboot.
See doc/README.autoboot for these options that
work with CONFIG_BOOTDELAY. None are required.
CONFIG_BOOT_RETRY_TIME
CONFIG_BOOT_RETRY_MIN
CONFIG_AUTOBOOT_KEYED
CONFIG_AUTOBOOT_PROMPT
CONFIG_AUTOBOOT_DELAY_STR
CONFIG_AUTOBOOT_STOP_STR
CONFIG_AUTOBOOT_DELAY_STR2
CONFIG_AUTOBOOT_STOP_STR2
CONFIG_ZERO_BOOTDELAY_CHECK
CONFIG_RESET_TO_RETRY
- Autoboot Command:
CONFIG_BOOTCOMMAND
Only needed when CONFIG_BOOTDELAY is enabled;
define a command string that is automatically executed
when no character is read on the console interface
within "Boot Delay" after reset.
CONFIG_BOOTARGS
This can be used to pass arguments to the bootm
command. The value of CONFIG_BOOTARGS goes into the
environment value "bootargs".
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.
- 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:
CONFIG_LOADS_ECHO
If defined to 1, all characters received during a
serial download (using the "loads" command) are
echoed back. 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.
- Kgdb Serial Baudrate: (if CFG_CMD_KGDB is defined)
CONFIG_KGDB_BAUDRATE
Select one of the baudrates listed in
CFG_BAUDRATE_TABLE, see below.
- Monitor Functions:
CONFIG_COMMANDS
Most monitor functions can be selected (or
de-selected) by adjusting the definition of
CONFIG_COMMANDS; to select individual functions,
#define CONFIG_COMMANDS by "OR"ing any of the
following values:
#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_ENV saveenv
CFG_CMD_FDC * Floppy Disk Support
CFG_CMD_FAT FAT partition support
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_ITEST * Integer/string test of 2 values
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_PCM ... ...
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