Fix unused function in cmd_bdinfo.c

[karo-tx-uboot.git] / README

diff --git a/README b/README
index c5cfb13a4f9c5297d04cdb9844b3dfae0e58bdea..fda0190d5ff99361558591d4b0ba29f56a683bda 100644 (file)
--- a/README
+++ b/README
@@ -134,7 +134,7 @@ Additional fields (if present) indicate release candidates or bug fix
 releases in "stable" maintenance trees.
 
 Examples:
 releases in "stable" maintenance trees.
 
 Examples:

-       U-Boot v2009.11     - Release November 2009
+       U-Boot v2009.11     - Release November 2009

        U-Boot v2009.11.1   - Release 1 in version November 2009 stable tree
        U-Boot v2010.09-rc1 - Release candiate 1 for September 2010 release
 
        U-Boot v2009.11.1   - Release 1 in version November 2009 stable tree
        U-Boot v2010.09-rc1 - Release candiate 1 for September 2010 release
 


@@ -181,6 +181,11 @@ Directory Hierarchy:
   /mips                        Files generic to MIPS architecture
     /cpu               CPU specific files
       /mips32          Files specific to MIPS32 CPUs
   /mips                        Files generic to MIPS architecture
     /cpu               CPU specific files
       /mips32          Files specific to MIPS32 CPUs

+      /xburst          Files specific to Ingenic XBurst CPUs
+    /lib               Architecture specific library files
+  /nds32               Files generic to NDS32 architecture
+    /cpu               CPU specific files
+      /n1213           Files specific to Andes Technology N1213 CPUs

     /lib               Architecture specific library files
   /nios2               Files generic to Altera NIOS2 architecture
     /cpu               CPU specific files
     /lib               Architecture specific library files
   /nios2               Files generic to Altera NIOS2 architecture
     /cpu               CPU specific files


@@ -764,7 +769,7 @@ The following options need to be configured:
                CONFIG_CMD_NAND         * NAND support
                CONFIG_CMD_NET            bootp, tftpboot, rarpboot
                CONFIG_CMD_PCA953X      * PCA953x I2C gpio commands
                CONFIG_CMD_NAND         * NAND support
                CONFIG_CMD_NET            bootp, tftpboot, rarpboot
                CONFIG_CMD_PCA953X      * PCA953x I2C gpio commands

-               CONFIG_CMD_PCA953X_INFO * PCA953x I2C gpio info command
+               CONFIG_CMD_PCA953X_INFO * PCA953x I2C gpio info command

                CONFIG_CMD_PCI          * pciinfo
                CONFIG_CMD_PCMCIA               * PCMCIA support
                CONFIG_CMD_PING         * send ICMP ECHO_REQUEST to network
                CONFIG_CMD_PCI          * pciinfo
                CONFIG_CMD_PCMCIA               * PCMCIA support
                CONFIG_CMD_PING         * send ICMP ECHO_REQUEST to network


@@ -783,6 +788,8 @@ The following options need to be configured:
                CONFIG_CMD_SOURCE         "source" command Support
                CONFIG_CMD_SPI          * SPI serial bus support
                CONFIG_CMD_TFTPSRV      * TFTP transfer in server mode
                CONFIG_CMD_SOURCE         "source" command Support
                CONFIG_CMD_SPI          * SPI serial bus support
                CONFIG_CMD_TFTPSRV      * TFTP transfer in server mode

+               CONFIG_CMD_TFTPPUT      * TFTP put command (upload)
+               CONFIG_CMD_TIME         * run command and report execution time

                CONFIG_CMD_USB          * USB support
                CONFIG_CMD_CDP          * Cisco Discover Protocol support
                CONFIG_CMD_FSL          * Microblaze FSL support
                CONFIG_CMD_USB          * USB support
                CONFIG_CMD_CDP          * Cisco Discover Protocol support
                CONFIG_CMD_FSL          * Microblaze FSL support


@@ -809,6 +816,36 @@ The following options need to be configured:
 
                XXX - this list needs to get updated!
 
 
                XXX - this list needs to get updated!
 

+- Device tree:
+               CONFIG_OF_CONTROL
+               If this variable is defined, U-Boot will use a device tree
+               to configure its devices, instead of relying on statically
+               compiled #defines in the board file. This option is
+               experimental and only available on a few boards. The device
+               tree is available in the global data as gd->fdt_blob.
+
+               U-Boot needs to get its device tree from somewhere. This can
+               be done using one of the two options below:
+
+               CONFIG_OF_EMBED
+               If this variable is defined, U-Boot will embed a device tree
+               binary in its image. This device tree file should be in the
+               board directory and called <soc>-<board>.dts. The binary file
+               is then picked up in board_init_f() and made available through
+               the global data structure as gd->blob.
+
+               CONFIG_OF_SEPARATE
+               If this variable is defined, U-Boot will build a device tree
+               binary. It will be called u-boot.dtb. Architecture-specific
+               code will locate it at run-time. Generally this works by:
+
+                       cat u-boot.bin u-boot.dtb >image.bin
+
+               and in fact, U-Boot does this for you, creating a file called
+               u-boot-dtb.bin which is useful in the common case. You can
+               still use the individual files if you need something more
+               exotic.
+

 - Watchdog:
                CONFIG_WATCHDOG
                If this variable is defined, it enables watchdog
 - Watchdog:
                CONFIG_WATCHDOG
                If this variable is defined, it enables watchdog


@@ -839,7 +876,7 @@ The following options need to be configured:
 
                CONFIG_RTC_MPC8xx       - use internal RTC of MPC8xx
                CONFIG_RTC_PCF8563      - use Philips PCF8563 RTC
 
                CONFIG_RTC_MPC8xx       - use internal RTC of MPC8xx
                CONFIG_RTC_PCF8563      - use Philips PCF8563 RTC

-               CONFIG_RTC_MC13783      - use MC13783 RTC
+               CONFIG_RTC_MC13XXX      - use MC13783 or MC13892 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_MC146818     - use MC146818 RTC
                CONFIG_RTC_DS1307       - use Maxim, Inc. DS1307 RTC
                CONFIG_RTC_DS1337       - use Maxim, Inc. DS1337 RTC


@@ -920,7 +957,20 @@ The following options need to be configured:
 
 - NETWORK Support (PCI):
                CONFIG_E1000
 
 - NETWORK Support (PCI):
                CONFIG_E1000

-               Support for Intel 8254x gigabit chips.
+               Support for Intel 8254x/8257x gigabit chips.
+
+               CONFIG_E1000_SPI
+               Utility code for direct access to the SPI bus on Intel 8257x.
+               This does not do anything useful unless you set at least one
+               of CONFIG_CMD_E1000 or CONFIG_E1000_SPI_GENERIC.
+
+               CONFIG_E1000_SPI_GENERIC
+               Allow generic access to the SPI bus on the Intel 8257x, for
+               example with the "sspi" command.
+
+               CONFIG_CMD_E1000
+               Management command for E1000 devices.  When used on devices
+               with SPI support you can reprogram the EEPROM from U-Boot.

 
                CONFIG_E1000_FALLBACK_MAC
                default MAC for empty EEPROM after production.
 
                CONFIG_E1000_FALLBACK_MAC
                default MAC for empty EEPROM after production.


@@ -977,6 +1027,12 @@ The following options need to be configured:
                        Define this to use i/o functions instead of macros
                        (some hardware wont work with macros)
 
                        Define this to use i/o functions instead of macros
                        (some hardware wont work with macros)
 

+               CONFIG_DRIVER_TI_EMAC
+               Support for davinci emac
+
+                       CONFIG_SYS_DAVINCI_EMAC_PHY_COUNT
+                       Define this if you have more then 3 PHYs.
+

                CONFIG_FTGMAC100
                Support for Faraday's FTGMAC100 Gigabit SoC Ethernet
 
                CONFIG_FTGMAC100
                Support for Faraday's FTGMAC100 Gigabit SoC Ethernet
 


@@ -1138,6 +1194,11 @@ The following options need to be configured:
                to disable the command chpart. This is the default when you
                have not defined a custom partition
 
                to disable the command chpart. This is the default when you
                have not defined a custom partition
 

+- FAT(File Allocation Table) filesystem write function support:
+               CONFIG_FAT_WRITE
+               Support for saving memory data as a file
+               in FAT formatted partition
+

 - Keyboard Support:
                CONFIG_ISA_KEYBOARD
 
 - Keyboard Support:
                CONFIG_ISA_KEYBOARD
 


@@ -1390,18 +1451,37 @@ The following options need to be configured:
                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.
                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.

+               (Environment variable "ipaddr")

 
 - Server IP address:
                CONFIG_SERVERIP
 
                Defines a default value for the IP address of a TFTP
                server to contact when using the "tftboot" command.
 
 - Server IP address:
                CONFIG_SERVERIP
 
                Defines a default value for the IP address of a TFTP
                server to contact when using the "tftboot" command.

+               (Environment variable "serverip")

 
                CONFIG_KEEP_SERVERADDR
 
                Keeps the server's MAC address, in the env 'serveraddr'
                for passing to bootargs (like Linux's netconsole option)
 
 
                CONFIG_KEEP_SERVERADDR
 
                Keeps the server's MAC address, in the env 'serveraddr'
                for passing to bootargs (like Linux's netconsole option)
 

+- Gateway IP address:
+               CONFIG_GATEWAYIP
+
+               Defines a default value for the IP address of the
+               default router where packets to other networks are
+               sent to.
+               (Environment variable "gatewayip")
+
+- Subnet mask:
+               CONFIG_NETMASK
+
+               Defines a default value for the subnet mask (or
+               routing prefix) which is used to determine if an IP
+               address belongs to the local subnet or needs to be
+               forwarded through a router.
+               (Environment variable "netmask")
+

 - Multicast TFTP Mode:
                CONFIG_MCAST_TFTP
 
 - Multicast TFTP Mode:
                CONFIG_MCAST_TFTP
 


@@ -1688,24 +1768,24 @@ The following options need to be configured:
                CONFIG_I2C_MULTI_BUS
 
                This option allows the use of multiple I2C buses, each of which
                CONFIG_I2C_MULTI_BUS
 
                This option allows the use of multiple I2C buses, each of which

-               must have a controller.  At any point in time, only one bus is
-               active.  To switch to a different bus, use the 'i2c dev' command.
+               must have a controller.  At any point in time, only one bus is
+               active.  To switch to a different bus, use the 'i2c dev' command.

                Note that bus numbering is zero-based.
 
                CONFIG_SYS_I2C_NOPROBES
 
                This option specifies a list of I2C devices that will be skipped
                Note that bus numbering is zero-based.
 
                CONFIG_SYS_I2C_NOPROBES
 
                This option specifies a list of I2C devices that will be skipped

-               when the 'i2c probe' command is issued.  If CONFIG_I2C_MULTI_BUS
+               when the 'i2c probe' command is issued.  If CONFIG_I2C_MULTI_BUS

                is set, specify a list of bus-device pairs.  Otherwise, specify
                a 1D array of device addresses
 
                e.g.
                        #undef  CONFIG_I2C_MULTI_BUS
                is set, specify a list of bus-device pairs.  Otherwise, specify
                a 1D array of device addresses
 
                e.g.
                        #undef  CONFIG_I2C_MULTI_BUS

-                       #define CONFIG_SYS_I2C_NOPROBES {0x50,0x68}
+                       #define CONFIG_SYS_I2C_NOPROBES {0x50,0x68}

 
                will skip addresses 0x50 and 0x68 on a board with one I2C bus
 
 
                will skip addresses 0x50 and 0x68 on a board with one I2C bus
 

-                       #define CONFIG_I2C_MULTI_BUS
+                       #define CONFIG_I2C_MULTI_BUS

                        #define CONFIG_SYS_I2C_MULTI_NOPROBES   {{0,0x50},{0,0x68},{1,0x54}}
 
                will skip addresses 0x50 and 0x68 on bus 0 and address 0x54 on bus 1
                        #define CONFIG_SYS_I2C_MULTI_NOPROBES   {{0,0x50},{0,0x68},{1,0x54}}
 
                will skip addresses 0x50 and 0x68 on bus 0 and address 0x54 on bus 1


@@ -1824,13 +1904,13 @@ The following options need to be configured:
                Enables a hardware SPI driver for general-purpose reads
                and writes.  As with CONFIG_SOFT_SPI, the board configuration
                must define a list of chip-select function pointers.
                Enables a hardware SPI driver for general-purpose reads
                and writes.  As with CONFIG_SOFT_SPI, the board configuration
                must define a list of chip-select function pointers.

-               Currently supported on some MPC8xxx processors.  For an
+               Currently supported on some MPC8xxx processors.  For an

                example, see include/configs/mpc8349emds.h.
 
                CONFIG_MXC_SPI
 
                Enables the driver for the SPI controllers on i.MX and MXC
                example, see include/configs/mpc8349emds.h.
 
                CONFIG_MXC_SPI
 
                Enables the driver for the SPI controllers on i.MX and MXC

-               SoCs. Currently only i.MX31 is supported.
+               SoCs. Currently i.MX31/35/51 are supported.

 
 - FPGA Support: CONFIG_FPGA
 
 
 - FPGA Support: CONFIG_FPGA
 


@@ -2139,7 +2219,7 @@ Legacy uImage format:
    13  common/image.c          Start multifile image verification
    14  common/image.c          No initial ramdisk, no multifile, continue.
 
    13  common/image.c          Start multifile image verification
    14  common/image.c          No initial ramdisk, no multifile, continue.
 

-   15  arch/<arch>/lib/bootm.c All preparation done, transferring control to OS
+   15  arch/<arch>/lib/bootm.c All preparation done, transferring control to OS

 
   -30  arch/powerpc/lib/board.c        Fatal error, hang the system
   -31  post/post.c             POST test failed, detected by post_output_backlog()
 
   -30  arch/powerpc/lib/board.c        Fatal error, hang the system
   -31  post/post.c             POST test failed, detected by post_output_backlog()


@@ -2386,6 +2466,20 @@ Modem Support:
 
                See also: doc/README.Modem
 
 
                See also: doc/README.Modem
 

+Board initialization settings:
+------------------------------
+
+During Initialization u-boot calls a number of board specific functions
+to allow the preparation of board specific prerequisites, e.g. pin setup
+before drivers are initialized. To enable these callbacks the
+following configuration macros have to be defined. Currently this is
+architecture specific, so please check arch/your_architecture/lib/board.c
+typically in board_init_f() and board_init_r().
+
+- CONFIG_BOARD_EARLY_INIT_F: Call board_early_init_f()
+- CONFIG_BOARD_EARLY_INIT_R: Call board_early_init_r()
+- CONFIG_BOARD_LATE_INIT: Call board_late_init()
+- CONFIG_BOARD_POSTCLK_INIT: Call board_postclk_init()

 
 Configuration Settings:
 -----------------------
 
 Configuration Settings:
 -----------------------


@@ -2503,7 +2597,7 @@ Configuration Settings:
                used) must be put below this limit, unless "bootm_low"
                enviroment variable is defined and non-zero. In such case
                all data for the Linux kernel must be between "bootm_low"
                used) must be put below this limit, unless "bootm_low"
                enviroment variable is defined and non-zero. In such case
                all data for the Linux kernel must be between "bootm_low"

-               and "bootm_low" + CONFIG_SYS_BOOTMAPSZ.  The environment
+               and "bootm_low" + CONFIG_SYS_BOOTMAPSZ.  The environment

                variable "bootm_mapsize" will override the value of
                CONFIG_SYS_BOOTMAPSZ.  If CONFIG_SYS_BOOTMAPSZ is undefined,
                then the value in "bootm_size" will be used instead.
                variable "bootm_mapsize" will override the value of
                CONFIG_SYS_BOOTMAPSZ.  If CONFIG_SYS_BOOTMAPSZ is undefined,
                then the value in "bootm_size" will be used instead.


@@ -2793,7 +2887,7 @@ to save the current settings.
          This setting describes a second storage area of CONFIG_ENV_SIZE
          size used to hold a redundant copy of the environment data, so
          that there is a valid backup copy in case there is a power failure
          This setting describes a second storage area of CONFIG_ENV_SIZE
          size used to hold a redundant copy of the environment data, so
          that there is a valid backup copy in case there is a power failure

-         during a "saveenv" operation.  CONFIG_ENV_OFFSET_RENDUND must be
+         during a "saveenv" operation.  CONFIG_ENV_OFFSET_RENDUND must be

          aligned to an erase block boundary.
 
        - CONFIG_ENV_RANGE (optional):
          aligned to an erase block boundary.
 
        - CONFIG_ENV_RANGE (optional):


@@ -2887,7 +2981,7 @@ Low Level (hardware related) configuration options:
 - CONFIG_SYS_CCSRBAR_PHYS:
                Physical address of CCSR.  CCSR can be relocated to a new
                physical address, if desired.  In this case, this macro should
 - CONFIG_SYS_CCSRBAR_PHYS:
                Physical address of CCSR.  CCSR can be relocated to a new
                physical address, if desired.  In this case, this macro should

-               be set to that address.  Otherwise, it should be set to the
+               be set to that address.  Otherwise, it should be set to the

                same value as CONFIG_SYS_CCSRBAR_DEFAULT.  For example, CCSR
                is typically relocated on 36-bit builds.  It is recommended
                that this macro be defined via the _HIGH and _LOW macros:
                same value as CONFIG_SYS_CCSRBAR_DEFAULT.  For example, CCSR
                is typically relocated on 36-bit builds.  It is recommended
                that this macro be defined via the _HIGH and _LOW macros:


@@ -3098,6 +3192,9 @@ Low Level (hardware related) configuration options:
                parameters are extracted from datasheet and hard-coded into
                header files or board specific files.
 
                parameters are extracted from datasheet and hard-coded into
                header files or board specific files.
 

+- CONFIG_FSL_DDR_INTERACTIVE
+               Enable interactive DDR debugging. See doc/README.fsl-ddr.
+

 - CONFIG_SYS_83XX_DDR_USES_CS0
                Only for 83xx systems. If specified, then DDR should
                be configured using CS0 and CS1 instead of CS2 and CS3.
 - CONFIG_SYS_83XX_DDR_USES_CS0
                Only for 83xx systems. If specified, then DDR should
                be configured using CS0 and CS1 instead of CS2 and CS3.


@@ -3151,7 +3248,7 @@ Low Level (hardware related) configuration options:
                globally (CONFIG_CMD_MEM).
 
 - CONFIG_SKIP_LOWLEVEL_INIT
                globally (CONFIG_CMD_MEM).
 
 - CONFIG_SKIP_LOWLEVEL_INIT

-               [ARM, MIPS only] If this variable is defined, then certain
+               [ARM, NDS32, MIPS only] If this variable is defined, then certain

                low level initializations (like setting up the memory
                controller) are omitted and/or U-Boot does not
                relocate itself into RAM.
                low level initializations (like setting up the memory
                controller) are omitted and/or U-Boot does not
                relocate itself into RAM.


@@ -3166,12 +3263,55 @@ Low Level (hardware related) configuration options:
                that is executed before the actual U-Boot. E.g. when
                compiling a NAND SPL.
 
                that is executed before the actual U-Boot. E.g. when
                compiling a NAND SPL.
 

+- CONFIG_SYS_NAND_HW_ECC_OOBFIRST
+               define this, if you want to read first the oob data
+               and then the data. This is used for example on
+               davinci plattforms.
+

 - CONFIG_USE_ARCH_MEMCPY
   CONFIG_USE_ARCH_MEMSET
                If these options are used a optimized version of memcpy/memset will
                be used if available. These functions may be faster under some
                conditions but may increase the binary size.
 
 - CONFIG_USE_ARCH_MEMCPY
   CONFIG_USE_ARCH_MEMSET
                If these options are used a optimized version of memcpy/memset will
                be used if available. These functions may be faster under some
                conditions but may increase the binary size.
 

+Freescale QE/FMAN Firmware Support:
+-----------------------------------
+
+The Freescale QUICCEngine (QE) and Frame Manager (FMAN) both support the
+loading of "firmware", which is encoded in the QE firmware binary format.
+This firmware often needs to be loaded during U-Boot booting, so macros
+are used to identify the storage device (NOR flash, SPI, etc) and the address
+within that device.
+
+- CONFIG_SYS_QE_FMAN_FW_ADDR
+       The address in the storage device where the firmware is located.  The
+       meaning of this address depends on which CONFIG_SYS_QE_FW_IN_xxx macro
+       is also specified.
+
+- CONFIG_SYS_QE_FMAN_FW_LENGTH
+       The maximum possible size of the firmware.  The firmware binary format
+       has a field that specifies the actual size of the firmware, but it
+       might not be possible to read any part of the firmware unless some
+       local storage is allocated to hold the entire firmware first.
+
+- CONFIG_SYS_QE_FMAN_FW_IN_NOR
+       Specifies that QE/FMAN firmware is located in NOR flash, mapped as
+       normal addressable memory via the LBC.  CONFIG_SYS_FMAN_FW_ADDR is the
+       virtual address in NOR flash.
+
+- CONFIG_SYS_QE_FMAN_FW_IN_NAND
+       Specifies that QE/FMAN firmware is located in NAND flash.
+       CONFIG_SYS_FMAN_FW_ADDR is the offset within NAND flash.
+
+- CONFIG_SYS_QE_FMAN_FW_IN_MMC
+       Specifies that QE/FMAN firmware is located on the primary SD/MMC
+       device.  CONFIG_SYS_FMAN_FW_ADDR is the byte offset on that device.
+
+- CONFIG_SYS_QE_FMAN_FW_IN_SPIFLASH
+       Specifies that QE/FMAN firmware is located on the primary SPI
+       device.  CONFIG_SYS_FMAN_FW_ADDR is the byte offset on that device.
+
+

 Building the Software:
 ======================
 
 Building the Software:
 ======================
 


@@ -3335,6 +3475,7 @@ bootp     - boot image via network using BootP/TFTP protocol
 tftpboot- boot image via network using TFTP protocol
               and env variables "ipaddr" and "serverip"
               (and eventually "gatewayip")
 tftpboot- boot image via network using TFTP protocol
               and env variables "ipaddr" and "serverip"
               (and eventually "gatewayip")

+tftpput - upload a file via network using TFTP protocol

 rarpboot- boot image via network using RARP/TFTP protocol
 diskboot- boot from IDE devicebootd   - boot default, i.e., run 'bootcmd'
 loads  - load S-Record file over serial line
 rarpboot- boot image via network using RARP/TFTP protocol
 diskboot- boot from IDE devicebootd   - boot default, i.e., run 'bootcmd'
 loads  - load S-Record file over serial line


@@ -3415,7 +3556,7 @@ List of environment variables (most likely not complete):
                  kernel -- see the description of CONFIG_SYS_BOOTMAPSZ and
                  bootm_mapsize.
 
                  kernel -- see the description of CONFIG_SYS_BOOTMAPSZ and
                  bootm_mapsize.
 

-  bootm_mapsize        - Size of the initial memory mapping for the Linux kernel.
+  bootm_mapsize - Size of the initial memory mapping for the Linux kernel.

                  This variable is given as a hexadecimal number and it
                  defines the size of the memory region starting at base
                  address bootm_low that is accessible by the Linux kernel
                  This variable is given as a hexadecimal number and it
                  defines the size of the memory region starting at base
                  address bootm_low that is accessible by the Linux kernel


@@ -3458,6 +3599,10 @@ List of environment variables (most likely not complete):
                  add the information it needs into it, and the memory
                  must be accessible by the kernel.
 
                  add the information it needs into it, and the memory
                  must be accessible by the kernel.
 

+  fdtcontroladdr- if set this is the address of the control flattened
+                 device tree used by U-Boot when CONFIG_OF_CONTROL is
+                 defined.
+

   i2cfast      - (PPC405GP|PPC405EP only)
                  if set to 'y' configures Linux I2C driver for fast
                  mode (400kHZ). This environment variable is used in
   i2cfast      - (PPC405GP|PPC405EP only)
                  if set to 'y' configures Linux I2C driver for fast
                  mode (400kHZ). This environment variable is used in


@@ -3553,6 +3698,25 @@ List of environment variables (most likely not complete):
                  Ethernet is encapsulated/received over 802.1q
                  VLAN tagged frames.
 
                  Ethernet is encapsulated/received over 802.1q
                  VLAN tagged frames.
 

+The following image location variables contain the location of images
+used in booting. The "Image" column gives the role of the image and is
+not an environment variable name. The other columns are environment
+variable names. "File Name" gives the name of the file on a TFTP
+server, "RAM Address" gives the location in RAM the image will be
+loaded to, and "Flash Location" gives the image's address in NOR
+flash or offset in NAND flash.
+
+*Note* - these variables don't have to be defined for all boards, some
+boards currenlty use other variables for these purposes, and some
+boards use these variables for other purposes.
+
+Image              File Name        RAM Address       Flash Location
+-----              ---------        -----------       --------------
+u-boot             u-boot           u-boot_addr_r     u-boot_addr
+Linux kernel       bootfile         kernel_addr_r     kernel_addr
+device tree blob    fdtfile         fdt_addr_r        fdt_addr
+ramdisk                    ramdiskfile      ramdisk_addr_r    ramdisk_addr
+

 The following environment variables may be used and automatically
 updated by the network boot commands ("bootp" and "rarpboot"),
 depending the information provided by your boot server:
 The following environment variables may be used and automatically
 updated by the network boot commands ("bootp" and "rarpboot"),
 depending the information provided by your boot server:


@@ -3666,7 +3830,7 @@ o If neither SROM nor the environment contain a MAC address, an error
   is raised.
 
 If Ethernet drivers implement the 'write_hwaddr' function, valid MAC addresses
   is raised.
 
 If Ethernet drivers implement the 'write_hwaddr' function, valid MAC addresses

-will be programmed into hardware as part of the initialization process.  This
+will be programmed into hardware as part of the initialization process.         This

 may be skipped by setting the appropriate 'ethmacskip' environment variable.
 The naming convention is as follows:
 "ethmacskip" (=>eth0), "eth1macskip" (=>eth1) etc.
 may be skipped by setting the appropriate 'ethmacskip' environment variable.
 The naming convention is as follows:
 "ethmacskip" (=>eth0), "eth1macskip" (=>eth1) etc.


@@ -3699,8 +3863,8 @@ details; basically, the header defines the following image properties:
   Currently supported: Linux, NetBSD, VxWorks, QNX, RTEMS, LynxOS,
   INTEGRITY).
 * Target CPU Architecture (Provisions for Alpha, ARM, AVR32, Intel x86,
   Currently supported: Linux, NetBSD, VxWorks, QNX, RTEMS, LynxOS,
   INTEGRITY).
 * Target CPU Architecture (Provisions for Alpha, ARM, AVR32, Intel x86,

-  IA64, MIPS, Nios II, PowerPC, IBM S390, SuperH, Sparc, Sparc 64 Bit;
-  Currently supported: ARM, AVR32, Intel x86, MIPS, Nios II, PowerPC).
+  IA64, MIPS, NDS32, Nios II, PowerPC, IBM S390, SuperH, Sparc, Sparc 64 Bit;
+  Currently supported: ARM, AVR32, Intel x86, MIPS, NDS32, Nios II, PowerPC).

 * Compression Type (uncompressed, gzip, bzip2)
 * Load Address
 * Entry Point
 * Compression Type (uncompressed, gzip, bzip2)
 * Load Address
 * Entry Point


@@ -4393,6 +4557,20 @@ On Nios II, the ABI is documented here:
     Note: on Nios II, we give "-G0" option to gcc and don't use gp
     to access small data sections, so gp is free.
 
     Note: on Nios II, we give "-G0" option to gcc and don't use gp
     to access small data sections, so gp is free.
 

+On NDS32, the following registers are used:
+
+       R0-R1:  argument/return
+       R2-R5:  argument
+       R15:    temporary register for assembler
+       R16:    trampoline register
+       R28:    frame pointer (FP)
+       R29:    global pointer (GP)
+       R30:    link register (LP)
+       R31:    stack pointer (SP)
+       PC:     program counter (PC)
+
+    ==> U-Boot will use R10 to hold a pointer to the global data
+

 NOTE: DECLARE_GLOBAL_DATA_PTR must be used with file-global scope,
 or current versions of GCC may "optimize" the code too much.
 
 NOTE: DECLARE_GLOBAL_DATA_PTR must be used with file-global scope,
 or current versions of GCC may "optimize" the code too much.