On 02/17/2015 10:39 AM, Vitaly Andrianov wrote: > Currently to flash u-boot image onto NAND or SPI NOR flash, very first > time user need to use Code Composer Studio (CCS). This is cumbersome for > an user not familiar with CCS. This patch add simpler procedure using > uart boot mode for K2 EVMs. > > When UART bootmode is set and board is rebooted, the ROM boot loader > transfers the image at the beginning of the internal RAM. After the > transfer is complete the boot-loader sets the PC to the first internal RAM > address 0x0c000000. The u-boot.bin is linked to the address 0x0c001000. > > In order to use the u-boot.bin as an image for UART download, we need to > add 4K zeros prefix that act as 1K NOP instructions before reaching > 0xc001000. > > Signed-off-by: Vitaly Andrianov <vita...@ti.com> > Acked-by: Murali Karicheri <m-kariche...@ti.com> > Tested-by: Murali Karicheri <m-kariche...@ti.com> > --- > Changes in V2: > - removed extra EOL > - "MSMC" replaced by "internal RAM" in the commit message > > Makefile | 6 ++++++ > board/ti/ks2_evm/README | 15 +++++++++++++++ > 2 files changed, 21 insertions(+) > > diff --git a/Makefile b/Makefile > index 36a9a28..7a86cac 100644 > --- a/Makefile > +++ b/Makefile > @@ -940,6 +940,12 @@ u-boot-nand.gph: u-boot.bin FORCE > $(call if_changed,mkimage) > @dd if=/dev/zero bs=8 count=1 2>/dev/null >> $@ > > +u-boot.uart.pad: > + @dd if=/dev/zero bs=4 count=1024 2>/dev/null > $@ > + > +u-boot.uart: u-boot.uart.pad u-boot.bin FORCE > + $(call if_changed,cat) > + > # x86 uses a large ROM. We fill it with 0xff, put the 16-bit stuff (including > # reset vector) at the top, Intel ME descriptor at the bottom, and U-Boot in > # the middle. > diff --git a/board/ti/ks2_evm/README b/board/ti/ks2_evm/README > index 9ee90a4..7e2e096 100644 > --- a/board/ti/ks2_evm/README > +++ b/board/ti/ks2_evm/README > @@ -81,6 +81,21 @@ To build u-boot-nand.gph > >make k2hk_evm_defconfig > >make u-boot-nand.gph > > +To build u-boot.uart > + >make k2hk_evm_defconfig > + >make u-boot.uart > + > +Load and Run U-Boot on keystone EVMs using UART download > +======================================================== > + > +Open BMC and regular UART terminals. > + > +1. On the regular UART port start xmodem transfer of the u-boot.uart > +2. Using BMC terminal set the ARM-UART bootmode and reboot the EVM > + BMC> bootmode #4 > + MBC> reboot > +3. When xmodem is complete you should see the u-boot starts on the UART port > + > Load and Run U-Boot on keystone EVMs using CCS > ========================================= > >
Could you please address the comments provided in V1 of your patch first? https://patchwork.ozlabs.org/patch/440322/ I see my comments have not been responded to as to why the alternatives presented do not work. It is always a good practice to respond to review comments prior to posting a new revision and not just ignoring them. Sorry, I have to give a: Nak to this version of patch considering that there are still questions not addressed from V1. -- Regards, Nishanth Menon _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot