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Stephen Warren c61d94d860 pxe: implement fdtdir extlinux.conf tag 
People who write (or scripts that auto-generate) extlinux.conf don't
want to know about HW-specific information such as FDT filenames. Create
a new extlinux.conf tag "fdtdir" that specifies only the directory where
FDT files are located, and defer all knowledge of the filename to U-Boot.
The algorithm implemented is:

==========
if $fdt_addr_r is set:
  if "fdt" tag was specified in extlinux.conf:
    load the FDT from the filename in the tag
  else if "fdtdir" tag was specified in extlinux.conf:
    if "fdtfile" is set in the environment:
      load the FDT from filename in "$fdtfile"
    else:
      load the FDT from some automatically generated filename

if no FDT file was loaded, and $fdtaddr is set:
  # This indicates an FDT packaged with firmware
  use the FDT at $fdtaddr
==========

A small part of an example /boot/extlinux.conf might be:

==========
LABEL primary
        LINUX zImage
        FDTDIR ./

LABEL failsafe
        LINUX bkp/zImage
        FDTDIR bkp/
==========

... with /boot/tegra20-seaboard.dtb or /boot/bkp/tegra20-seaboard.dtb
being loaded by the sysboot/pxe code.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
2014-02-04 11:51:18 -05:00
..
spl spl: common: Support for USB MSD FAT image loading 2014-01-24 16:59:22 -05:00
bedbug.c Consolidate bool type 2013-04-01 16:33:52 -04:00
board_f.c Merge branch 'master' of git://git.denx.de/u-boot-arm 2014-01-10 10:56:00 -05:00
board_r.c board_r - fixup functions table after relocation 2014-01-27 08:28:13 -05:00
bootstage.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
bouncebuf.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
cmd_ambapp.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
cmd_bdinfo.c ppc4xx: Remove support for PPC405CR CPUs 2013-08-20 11:35:24 -04:00
cmd_bedbug.c Consolidate bool type 2013-04-01 16:33:52 -04:00
cmd_bmp.c Coding Style cleanup: replace leading SPACEs by TABs 2013-10-14 16:06:54 -04:00
cmd_boot.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
cmd_bootldr.c Blackfin: bootldr: use common defines 2011-04-08 00:44:27 -04:00
cmd_bootm.c bootm: Reinstate special case for standalone images 2014-01-14 09:01:05 -05:00
cmd_bootmenu.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
cmd_bootstage.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
cmd_cache.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
cmd_cbfs.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
cmd_console.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
cmd_cplbinfo.c various cmd_* files: fixed layout a little bit 2010-08-09 01:07:37 +02:00
cmd_cramfs.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
cmd_dataflash_mmc_mux.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
cmd_date.c Merge branch 'master' of git://git.denx.de/u-boot-i2c 2013-07-24 09:50:24 -04:00
cmd_dcr.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
cmd_dfu.c usb: new board-specific USB init interface 2013-10-20 23:42:40 +02:00
cmd_diag.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
cmd_disk.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
cmd_display.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
cmd_dtt.c Coding Style cleanup: remove trailing white space 2013-10-14 16:06:53 -04:00
cmd_echo.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
cmd_eeprom.c cmd_eeprom: bug fix for i2c read/write 2013-12-05 12:25:01 +01:00
cmd_elf.c Correct vxWorks elf boot to load at correct address 2013-12-13 09:17:32 -05:00
cmd_exit.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
cmd_ext2.c Fix number base handling of "load" command 2013-10-07 15:54:18 -04:00
cmd_ext4.c Fix number base handling of "load" command 2013-10-07 15:54:18 -04:00
cmd_fat.c Fix number base handling of "load" command 2013-10-07 15:54:18 -04:00
cmd_fdc.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
cmd_fdos.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
cmd_fdt.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
cmd_fitupd.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
cmd_flash.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
cmd_fpga.c fpga: Add support for gzip images with bitstreams 2013-11-06 09:15:12 +01:00
cmd_fpgad.c powerpc/ppc4xx: Convert new gdsys files to SPDX license tags 2013-07-26 15:32:59 -04:00
cmd_fs.c Fix number base handling of "load" command 2013-10-07 15:54:18 -04:00
cmd_fuse.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
cmd_gettime.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
cmd_gpio.c Convert cmd_usage() calls in common to use a return value 2012-03-06 21:09:46 +01:00
cmd_gpt.c cmd/gpt: Support gpt command for all devices 2013-11-08 15:25:12 -05:00
cmd_hash.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
cmd_help.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
cmd_i2c.c i2c: fix i2c dev command for not using new framework 2013-08-27 05:49:52 +02:00
cmd_ide.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
cmd_immap.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
cmd_ini.c SPDX-License-Identifier: convert BSD-3-Clause files 2013-08-19 15:45:35 -04:00
cmd_io.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
cmd_irq.c Coding Style cleanup: remove trailing white space 2013-10-14 16:06:53 -04:00
cmd_itest.c Coding Style cleanup: remove trailing white space 2013-10-14 16:06:53 -04:00
cmd_jffs2.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
cmd_ldrinfo.c Blackfin: ldrinfo: new command 2011-04-08 00:44:27 -04:00
cmd_led.c Coding Style cleanup: remove trailing white space 2013-10-14 16:06:53 -04:00
cmd_license.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
cmd_load.c Enable xmodem support 2013-08-16 13:45:15 -04:00
cmd_log.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
cmd_mac.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
cmd_md5sum.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
cmd_mdio.c net: add support for extended registers to mdio command 2013-11-22 16:50:52 -06:00
cmd_mem.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
cmd_mfsl.c common: fsl: Fix broken SPDX-License-Identifier change 2013-10-16 09:24:38 -04:00
cmd_mii.c net: trivial: Fix typos in mii field descriptions 2013-11-22 16:50:04 -06:00
cmd_misc.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
cmd_mmc.c mmc: add setdsr support 2014-01-09 11:47:51 +02:00
cmd_mmc_spi.c Convert cmd_usage() calls in common to use a return value 2012-03-06 21:09:46 +01:00
cmd_mp.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
cmd_mtdparts.c cmd_mtdparts: use 64 bits for flash size, partition size & offset 2013-10-09 12:52:16 -05:00
cmd_nand.c cmd_nand: Do not show usage when scrub is aborted 2013-08-22 17:25:03 -05:00
cmd_net.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
cmd_nvedit.c env: fix the env export varname 2013-11-08 15:25:14 -05:00
cmd_onenand.c mtd: resync with Linux-3.7.1 2013-05-31 17:12:03 -05:00
cmd_otp.c Convert cmd_usage() calls in common to use a return value 2012-03-06 21:09:46 +01:00
cmd_part.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
cmd_pci.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
cmd_pcmcia.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
cmd_portio.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
cmd_pxe.c pxe: implement fdtdir extlinux.conf tag 2014-02-04 11:51:18 -05:00
cmd_read.c Add a command to read raw blocks from a partition 2012-12-11 13:17:33 -07:00
cmd_reginfo.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
cmd_reiser.c cmd_reiser: normalize 'file not found' errors 2013-11-08 15:25:13 -05:00
cmd_sandbox.c sandbox: block driver using host file/device as backing store 2014-01-08 17:24:03 -07:00
cmd_sata.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
cmd_scsi.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
cmd_setexpr.c Coding Style cleanup: remove trailing white space 2013-10-14 16:06:53 -04:00
cmd_sf.c sandbox: spi: Adjust 'sf test' to work on sandbox 2014-01-11 12:21:30 +05:30
cmd_sha1sum.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
cmd_softswitch.c blackfin: bf609: add softswitch config command 2013-05-13 16:26:12 +08:00
cmd_sound.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
cmd_source.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
cmd_spi.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
cmd_spibootldr.c various cmd_* files: fixed layout a little bit 2010-08-09 01:07:37 +02:00
cmd_spl.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
cmd_strings.c Convert cmd_usage() calls in common to use a return value 2012-03-06 21:09:46 +01:00
cmd_terminal.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
cmd_test.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
cmd_thordown.c cmd:thor: Support for TIZEN's download command (thordown) 2013-10-20 23:42:41 +02:00
cmd_time.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
cmd_tpm.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
cmd_trace.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
cmd_tsi148.c Coding Style cleanup: remove trailing white space 2013-10-14 16:06:53 -04:00
cmd_ubi.c cmd_ubi: add write.part command, to write a volume in multiple parts 2013-10-09 12:52:22 -05:00
cmd_ubifs.c cmd_ubifs: normalize 'file not found' errors 2013-11-08 15:25:13 -05:00
cmd_universe.c Coding Style cleanup: remove trailing white space 2013-10-14 16:06:53 -04:00
cmd_unzip.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
cmd_usb.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
cmd_usb_mass_storage.c usb: ums: wait for usb cable connection before enter ums mode 2014-01-13 12:29:12 +01:00
cmd_version.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
cmd_ximg.c sandbox: Correct compiler warnings in cmd_bootm/cmd_ximg 2013-09-03 13:29:24 -06:00
cmd_yaffs2.c u-boot: Update yaffs2 file system 2012-08-09 23:39:18 +02:00
cmd_zfs.c cmd_zfs: normalize 'file not found' errors 2013-11-08 15:25:13 -05:00
cmd_zip.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
command.c command.c: Fix auto-completion for the full commands list case 2014-01-14 09:01:05 -05:00
console.c sandbox: Allow the console to work earlier 2014-01-08 17:24:50 -07:00
ddr_spd.c mpc8xxx: DDR2/DDR3: Clean up DIMM-type switch statements 2011-04-04 09:24:43 -05:00
dlmalloc.c Consolidate bool type 2013-04-01 16:33:52 -04:00
dlmalloc.src Consolidate bool type 2013-04-01 16:33:52 -04:00
edid.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
env_attr.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
env_callback.c common, env: optimize boottime 2014-01-14 09:01:06 -05:00
env_common.c Coding Style cleanup: remove trailing white space 2013-10-14 16:06:53 -04:00
env_dataflash.c env: dataflash: fix env_init issue 2013-10-14 16:06:52 -04:00
env_eeprom.c env_eeprom - fix bus recovery for "eeprom_bus_read" 2014-01-13 08:17:27 +01:00
env_embedded.c Coding Style cleanup: remove trailing white space 2013-10-14 16:06:53 -04:00
env_fat.c Coding Style cleanup: remove trailing white space 2013-10-14 16:06:53 -04:00
env_flags.c common, env: optimize boottime 2014-01-14 09:01:06 -05:00
env_flash.c Coding Style cleanup: remove trailing white space 2013-10-14 16:06:53 -04:00
env_mmc.c Coding Style cleanup: remove trailing white space 2013-10-14 16:06:53 -04:00
env_nand.c Coding Style cleanup: remove trailing white space 2013-10-14 16:06:53 -04:00
env_nowhere.c Coding Style cleanup: remove trailing white space 2013-10-14 16:06:53 -04:00
env_nvram.c Coding Style cleanup: remove trailing white space 2013-10-14 16:06:53 -04:00
env_onenand.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
env_remote.c Coding Style cleanup: remove trailing white space 2013-10-14 16:06:53 -04:00
env_sf.c cmd_sf|env_sf: Fix code cleanup 2013-08-06 23:58:43 +05:30
env_ubi.c Coding Style cleanup: remove trailing white space 2013-10-14 16:06:53 -04:00
exports.c Fix SPI build errors in exports.c 2011-12-07 08:41:22 +01:00
fdt_support.c fdt_support.c: Correct linux,initrd-start/end setting 2014-01-20 17:45:33 -05:00
flash.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
hash.c hash.c: Correct non-hash subcommand crc32 addr-save support 2013-11-25 10:41:51 -05:00
hush.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
hwconfig.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
image-fdt.c FIT: delete unnecessary casts 2013-09-20 10:30:54 -04:00
image-fit.c FIT: delete unnecessary casts 2013-09-20 10:30:54 -04:00
image-sig.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
image.c common/image.c: move VxWorks header string out of CONFIG_CMD_ELF 2014-01-14 09:01:05 -05:00
iomux.c Coding Style cleanup: remove trailing white space 2013-10-14 16:06:53 -04:00
kallsyms.c Add support for Linux-like kallsysms 2009-06-12 20:45:48 +02:00
kgdb.c Make sure that argv[] argument pointers are not modified. 2010-07-04 23:55:42 +02:00
kgdb_stubs.c kgdb: add default generic stubs 2010-01-18 00:23:00 +01:00
lcd.c lcd: allow overriding lcd_get_size() 2013-11-12 09:35:17 +01:00
lynxkdi.c checkpatch whitespace cleanups 2011-10-22 01:13:35 +02:00
main.c autoboot: add an option to override keyed autoboot 2013-11-08 15:25:14 -05:00
Makefile spl: common: Support for USB MSD FAT image loading 2014-01-24 16:59:22 -05:00
memsize.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
menu.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
miiphyutil.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
modem.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
s_record.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
splash.c video: consolidate splash screen alignment code 2013-07-08 20:21:24 +02:00
stdio.c serial: arm_dcc: Remove stdio structure support 2013-08-13 08:38:29 +02:00
system_map.c Add support for Linux-like kallsysms 2009-06-12 20:45:48 +02:00
update.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
usb.c usb: add enum usb_init_type parameter to usb_lowlevel_init 2013-10-20 23:45:26 +02:00
usb_hub.c usb: Use well-known descriptor sizes when parsing configuration 2013-08-26 21:56:34 +02:00
usb_kbd.c console: usb: kbd: To fix slow TFTP booting 2013-08-26 21:56:35 +02:00
usb_storage.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
xyzModem.c Add eCos-2.0 SPDX-License-Identifier to source files 2013-07-24 09:45:01 -04:00