Embedded module TQMa6x - PTXdist Linux BSP documentation

U-Boot Environment
Affects	U-Boot Environment
Issue	U-Boot Environment loading/storing uses eMMC only
Effect	If eMMC contains a valid environment sector the BSP Rev.0113 U-Boot will load that environment regardless of the actual boot device (e.g. sd card). As the partition layout has been changed with BSP Rev.0110, boot commands from environments of BSP Revs. ≤ 0109 will not work anymore. In consequence booting BSP Rev.0113 U-Boot will fail if an environment from BSP Rev. ≤ 0109 is present in eMMC.
Solution / Workaround	Will be fixed in next BSP release. Workaround boot failure: Boot from SD card using BSP Rev.0113 U-Boot Interrupt autoboot to access the U-Boot command line interface Set eMMC to be the active mmc device `mmc dev 0` Erase the environment sector `mmc erase 0x800 0x800` Reboot the system: `reset` Interrupt autoboot to access the U-Boot command line interface Save default enviroment to eMMC `saveenv`

Build failure on Ubuntu 16.x host
Affects	Image/RootFS creation
Issue	Segmentation fault caused by `genimage-7` tool when run on Ubuntu 16.x host
Effect	Target root.ext2 fails to build.
Solution / Workaround	Use `genimage-8` instead of `genimage-7` 1. copy `host-genimage.in` and `host-genimage.make` from `/usr/local/lib/ptxdist-2015.05.0/rules/` to `TQMa6x-BSP-REV.0109/rules/` 2. modify `TQMa6x-BSP-REV.0109/rules/host-genimage.make` like this: HOST_GENIMAGE_VERSION := 8 HOST_GENIMAGE_MD5 := 506a0cd6722431af87ef7cfe437662cc 3. run `ptxdist clean host-genimage` 4. run `ptxdist images`

U-Boot build failure
Affects	U-Boot build stage
Issue	Typo in configs/platform-tq-mba6x/rules/u-boot-spi-tqma6s.make
Effect	When U_BOOT_SPI_TQMA6S is selected, U-Boot fails to build properly.
Solution / Workaround	Change line 29 in configs/platform-tq-mba6x/rules/u-boot-spi-tqma6s.make from `U_BOOT_SPI_TQMA6S_LICENS E := GPLv2` to `U_BOOT_SPI_TQMA6S_LICENSE := GPLv2`

Bug in UDP test
Affects	iperf3 package provided with BSP
Issue	iperf3 reports extremly high packet loss when performing an UDP test
Effect	iperf3 is not suitable to determine meaningful UDP performance values
Solution / Workaround	Use older version of iperf (e.g. iperf2)

U-Boot build failure
Affects	U-Boot build stage
Issue	Typo in configs/platform-tq-mba6x/rules/u-boot-tqma6q.make
Effect	When PTXCONF_U_BOOT_TQMA6S is not selected (i.e. U-Boot should only be build for TQMaQ), U-Boot fails to build properly.
Solution / Workaround	Change line 66 in configs/platform-tq-mba6x/rules/u-boot-tqma6q.make from `ifdef PTXCONF_U_BOOT_TQMA6S_INSTALL_U_BOOT_IMX` to `ifdef PTXCONF_U_BOOT_TQMA6Q_INSTALL_U_BOOT_IMX`

Kernel does not boot
Affects	U-Boot & U-Boot environment
Issue	New Kernel memory map
Effect	Kernel does not boot (properly) with U-Boot and U-Boot environment from BSPs < Rev. 0104
Solution / Workaround	Use U-Boot from BSP Rev. 0104 and reset U-Boot envrionment to default (any custom variables can, of course, be added again afterwards).

Qt Creator debugging fails
Affects Subject	GDB
Issue	Missing support for Python scripts (i.e., gdb is not configured using `–with-python`)
Effect	Qt Creator Debugging Helpers will not work (properly)
Solution / Workaround	Build toolchain from source

Affected Revisions: all
Issue: Hub power issue, hub signals that port draws too much current even if the hub is powered
Solution: fixed, needs hardware workaround on MBa6x REV0100, fixed on newer revisions

Affected Revisions: all
Issue: missing support for cortex-strings in glibc
Solution:
1) If performance impacts are noticed, use OSELAS.Toolchain for cortexa8. It is known to work
2) Try other toolchain with cortex-strings support

Known Issues