Bootable SD image for ls1046ardb

siravix — Sun, 21 Nov 2021 21:14:53 GMT

Hello,

I am trying to build a bootable SD card image for an OK1046A-C2 board (based on LS1046A).
The board has 2GB of DDR4 memory.

I tried both Yocto and flex_build 21.08.

(1)
Yocto hardknott-3.3

conf/local.conf:
MACHINE ??= "ls1046ardb"

conf/bblayers.conf:
/workdir/poky/meta-freescale

(2)
I also built a composite firmware using flexbuild LSDK-21.08 for boot from SD card.

flex-builder -i mkfw -m ls1046ardb

Neither can boot with the same error message:

ERROR: First slot cannot be empty.
ERROR: Parsing DIMM Error
ERROR: DDR init failed.
NOTICE: Incorrect DRAM0 size is defined in platform_def.h
ERROR: mmap_add_region_check() failed. error -22
ERROR: mmap_add_region_check() failed. error -22
NOTICE: BL2: v2.4(release):LSDK-21.08-0-g340b20bcb
NOTICE: BL2: Built : 21:57:48, Nov 21 2021

The dvice can be booted from SPI which already has an older bootloader. Here is the partial output of bdinfo:

arch_number = 0x00000000
boot_params = 0x00000000
DRAM bank = 0x00000000
-> start = 0x80000000
-> size = 0x7BE00000
Secure ram = 0xFBE00000
...

Can you help me with this please? My goad is to build a bootable SD card image using the latest version of Yocto.

Re: Bootable SD image for ls1046ardb

yipingwang — Mon, 22 Nov 2021 09:30:36 GMT

You need to modify DDR timing configuration in ATF source code for your custom board.

In your Yocto build environment, please run the following command to fetch atf source code.

1. $ bitbake atf -c cleansstate

2. $ bitbake atf -c patch

3. Go to atf source code folder build_ls1046ardb/tmp/work/ls1046ardb-fsl-linux/atf/git-r0/git, please modify plat/nxp/soc-ls1046/ls1046ardb/ddr_init.c according to your target board.

If there is SPD on your target board, please modify the following section.

static const struct rc_timing rce[] = {
{1600, 8, 7},
{1867, 8, 7},
{2134, 8, 9},
{}
};

static const struct board_timing udimm[] = {
{0x04, rce, 0x01020304, 0x06070805},
};

If there is no SPD on your custom board, please define CONFIG_STATIC_DDR in plat/nxp/soc-ls1046/ls1046ardb/platform_def.h, and modify static_2100, static_1800 or static_1600 according to your target board.

4. Rebuild atf

$ bitbake atf -c configure -f

5. $ bitbake atf

6. Go to step 3 to continue to do modification.

According to your description, you have working u-boot on the target board, you could use CodeWarrior to connect to the target board to read DDR configuration parameters from the target board. In CodeWarrior IDE, please create a QCVS project with "reading from target" method, then get DDR configuration parameters in ddr_init1.c in Generated_Code folder.

topic Bootable SD image for ls1046ardb in QorIQ

Bootable SD image for ls1046ardb

Re: Bootable SD image for ls1046ardb