#
-# (C) Copyright 2000 - 2012
+# (C) Copyright 2000 - 2013
# 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
+# SPDX-License-Identifier: GPL-2.0+
#
Summary:
"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. The MAINTAINERS file lists board
+who contributed the specific port. The boards.cfg file lists board
maintainers.
Note: There is no CHANGELOG file in the actual U-Boot source tree;
/at91 Files specific to Atmel AT91RM9200 CPU
/imx Files specific to Freescale MC9328 i.MX CPUs
/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
/ixp Files specific to Intel XScale IXP CPUs
/pxa Files specific to Intel XScale PXA CPUs
- /s3c44b0 Files specific to Samsung S3C44B0 CPUs
/sa1100 Files specific to Intel StrongARM SA1100 CPUs
/lib Architecture specific library files
/avr32 Files generic to AVR32 architecture
This is the value to write into CCSR offset 0x18600
according to the A004510 workaround.
+ CONFIG_SYS_FSL_DSP_DDR_ADDR
+ This value denotes start offset of DDR memory which is
+ connected exclusively to the DSP cores.
+
CONFIG_SYS_FSL_DSP_M2_RAM_ADDR
This value denotes start offset of M2 memory
which is directly connected to the DSP core.
+ CONFIG_SYS_FSL_DSP_M3_RAM_ADDR
+ This value denotes start offset of M3 memory which is directly
+ connected to the DSP core.
+
CONFIG_SYS_FSL_DSP_CCSRBAR_DEFAULT
This value denotes start offset of DSP CCSR space.
+ CONFIG_SYS_FSL_DDR_EMU
+ Specify emulator support for DDR. Some DDR features such as
+ deskew training are not available.
+
- Generic CPU options:
CONFIG_SYS_BIG_ENDIAN, CONFIG_SYS_LITTLE_ENDIAN
to compress the specified memory at its best effort.
- Compression support:
+ CONFIG_GZIP
+
+ Enabled by default to support gzip compressed images.
+
CONFIG_BZIP2
If this option is set, support for bzip2 compressed
then calculate the amount of needed dynamic memory (ensuring
the appropriate CONFIG_SYS_MALLOC_LEN value).
+ CONFIG_LZO
+
+ If this option is set, support for LZO compressed images
+ is included.
+
- MII/PHY support:
CONFIG_PHY_ADDR
CONFIG_SYS_FSL_I2C2_SLAVE for the slave address of the
second bus.
+ - drivers/i2c/tegra_i2c.c:
+ - activate this driver with CONFIG_SYS_I2C_TEGRA
+ - This driver adds 4 i2c buses with a fix speed from
+ 100000 and the slave addr 0!
+
+ - drivers/i2c/ppc4xx_i2c.c
+ - activate this driver with CONFIG_SYS_I2C_PPC4XX
+ - CONFIG_SYS_I2C_PPC4XX_CH0 activate hardware channel 0
+ - CONFIG_SYS_I2C_PPC4XX_CH1 activate hardware channel 1
+
additional defines:
CONFIG_SYS_NUM_I2C_BUSES
Note: There is also a sha1sum command, which should perhaps
be deprecated in favour of 'hash sha1'.
+- Freescale i.MX specific commands:
+ CONFIG_CMD_HDMIDETECT
+ This enables 'hdmidet' command which returns true if an
+ HDMI monitor is detected. This command is i.MX 6 specific.
+
+ CONFIG_CMD_BMODE
+ This enables the 'bmode' (bootmode) command for forcing
+ a boot from specific media.
+
+ This is useful for forcing the ROM's usb downloader to
+ activate upon a watchdog reset which is nice when iterating
+ on U-Boot. Using the reset button or running bmode normal
+ will set it back to normal. This command currently
+ supports i.MX53 and i.MX6.
+
- Signing support:
CONFIG_RSA
Support for NAND boot using simple NAND drivers that
expose the cmd_ctrl() interface.
+ CONFIG_SPL_MPC8XXX_INIT_DDR_SUPPORT
+ Set for the SPL on PPC mpc8xxx targets, support for
+ arch/powerpc/cpu/mpc8xxx/ddr/libddr.o in SPL binary.
+
+ CONFIG_SPL_COMMON_INIT_DDR
+ Set for common ddr init with serial presence detect in
+ SPL binary.
+
CONFIG_SYS_NAND_5_ADDR_CYCLE, CONFIG_SYS_NAND_PAGE_COUNT,
CONFIG_SYS_NAND_PAGE_SIZE, CONFIG_SYS_NAND_OOBSIZE,
CONFIG_SYS_NAND_BLOCK_SIZE, CONFIG_SYS_NAND_BAD_BLOCK_POS,
option to re-enable it. This will affect the output of the
bootm command when booting a FIT image.
+- TPL framework
+ CONFIG_TPL
+ Enable building of TPL globally.
+
+ CONFIG_TPL_PAD_TO
+ Image offset to which the TPL should be padded before appending
+ the TPL payload. By default, this is defined as
+ CONFIG_SPL_MAX_SIZE, or 0 if CONFIG_SPL_MAX_SIZE is undefined.
+ CONFIG_SPL_PAD_TO must be either 0, meaning to append the SPL
+ payload without any padding, or >= CONFIG_SPL_MAX_SIZE.
+
Modem Support:
--------------
that is executed before the actual U-Boot. E.g. when
compiling a NAND SPL.
+- CONFIG_TPL_BUILD
+ Modifies the behaviour of start.S when compiling a loader
+ that is executed after the SPL and before the actual U-Boot.
+ It is loaded by the SPL.
+
- CONFIG_SYS_MPC85XX_NO_RESETVEC
Only for 85xx systems. If this variable is specified, the section
.resetvec is not kept and the section .bootpg is placed in the
npe_ucode - set load address for the NPE microcode
+ silent_linux - If set then linux will be told to boot silently, by
+ changing the console to be empty. If "yes" it will be
+ made silent. If "no" it will not be made silent. If
+ unset, then it will be made silent if the U-Boot console
+ is silent.
+
tftpsrcport - If this is set, the value is used for TFTP's
UDP source port.
R0: function argument word/integer result
R1-R3: function argument word
- R9: GOT pointer
- R10: stack limit (used only if stack checking if enabled)
+ R9: platform specific
+ R10: stack limit (used only if stack checking is enabled)
R11: argument (frame) pointer
R12: temporary workspace
R13: stack pointer
R14: link register
R15: program counter
- ==> U-Boot will use R8 to hold a pointer to the global data
+ ==> U-Boot will use R9 to hold a pointer to the global data
+
+ Note: on ARM, only R_ARM_RELATIVE relocations are supported.
On Nios II, the ABI is documented here:
http://www.altera.com/literature/hb/nios2/n2cpu_nii51016.pdf
* For major contributions, your entry to the CREDITS file
-* When you add support for a new board, don't forget to add this
- board to the MAINTAINERS file, too.
+* When you add support for a new board, don't forget to add a
+ maintainer e-mail address to the boards.cfg file, too.
* If your patch adds new configuration options, don't forget to
document these in the README file.