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Original question:

AM62A7: MCU can not get message from SCISERVER,SCISERVER who load and run it.

AM62A7: Why does tiboot3.bin in uboot can not print log in wakeup uart?

kingphy hozamon
Intellectual 260 points
Part Number: AM62A7

I has configured the dts as follow,But it can not printf log in wakeup uart.Only it can printf until uboot.img.Why?????

aliases {
remoteproc0 = &sysctrler;
remoteproc1 = &a53_0;
serial0 = &wkup_uart0;
serial3 = &main_uart1;
};

chosen {
stdout-path = "serial0:115200n8";
tick-timer = &timer1;
};

&mcu_pmx0 {
status = "okay";
u-boot,dm-spl;

wkup_uart0_pins_default: wkup-uart0-pins-default {
pinctrl-single,pins = <
AM62X_MCU_IOPAD(0x02c, PIN_INPUT, 0) /* (C6) WKUP_UART0_CTSn */
AM62X_MCU_IOPAD(0x030, PIN_OUTPUT, 0) /* (A4) WKUP_UART0_RTSn */
AM62X_MCU_IOPAD(0x024, PIN_INPUT, 0) /* (B4) WKUP_UART0_RXD */
AM62X_MCU_IOPAD(0x028, PIN_OUTPUT, 0) /* (C5) WKUP_UART0_TXD */
>;
u-boot,dm-spl;
};

  • 0
    TI__Expert 8480 points

    Hi,

    WKUP_UART0 is used by DM firmware, what are you trying to accomplish?

    ~ Judith

  • 0 in reply to Judith Mendez
    Intellectual 260 points

    OK，Thank you!

    I have another two questions:

    1.Does DM firmware exist in tiboot3.bin,and it is loaded by SOC ROM,RBL?

    2.If I want to use wkupuart to printf log in tiboot3.bin,how do I configure it?

  • 0 in reply to kingphy hozamon
    TI__Expert 8480 points

    Hi,

    1. DM FW is packaged in tispl.bin:

    FIT description: Configuration to load ATF and SPL
Created:         Tue Jul 25 13:43:44 2023
 Image 0 (atf)
  Description:  ARM Trusted Firmware
  Created:      Tue Jul 25 13:43:44 2023
  Type:         Firmware
  Compression:  uncompressed
  Data Size:    44056 Bytes = 43.02 KiB = 0.04 MiB
  Architecture: AArch64
  OS:           ARM Trusted Firmware
  Load Address: 0x9e780000
 Image 1 (tee)
  Description:  OPTEE
  Created:      Tue Jul 25 13:43:44 2023
  Type:         Trusted Execution Environment Image
  Compression:  uncompressed
  Data Size:    399408 Bytes = 390.05 KiB = 0.38 MiB
 Image 2 (dm)
  Description:  DM binary
  Created:      Tue Jul 25 13:43:44 2023
  Type:         Firmware
  Compression:  uncompressed
  Data Size:    152520 Bytes = 148.95 KiB = 0.15 MiB
  Architecture: Unknown Architecture
  OS:           Unknown OS
  Load Address: 0x89000000
 Image 3 (spl)
  Description:  SPL (64-bit)
  Created:      Tue Jul 25 13:43:44 2023
  Type:         Standalone Program
  Compression:  uncompressed
  Data Size:    318352 Bytes = 310.89 KiB = 0.30 MiB
  Architecture: AArch64
  Load Address: 0x80080000
  Entry Point:  0x80080000
 Image 4 (k3-am625-sk.dtb)
  Description:  k3-am625-sk
  Created:      Tue Jul 25 13:43:44 2023
  Type:         Flat Device Tree
  Compression:  uncompressed
  Data Size:    20785 Bytes = 20.30 KiB = 0.02 MiB
  Architecture: ARM
 Default Configuration: 'k3-am625-sk.dtb'
 Configuration 0 (k3-am625-sk.dtb)
  Description:  k3-am625-sk
  Kernel:       unavailable
  Firmware:     atf
  FDT:          k3-am625-sk.dtb
  Loadables:    tee
                dm
                spl


    It is loaded by u-boot as you can see here: https://software-dl.ti.com/processor-sdk-linux-rt/esd/AM62X/08_06_00_42/exports/docs/linux/Foundational_Components/U-Boot/UG-General-Info.html#boot-flow

    2. Why do you want to use wkupuart0 to print u-boot logs? What is the usecase? It is a complicated process to switch UART for U-boot, so please explain to better help you.

    ~ Judith

  • 0 in reply to Judith Mendez
    Intellectual 260 points

    My application is that DM-R5 monitor MCU-R5 and A53.And DM-R5 will printf log in wakeup uart.And MCU-UART ,SOC-UART are used for MCU and SOC.Because considerring POWERDomain.

  • 0 in reply to kingphy hozamon
    TI__Expert 8480 points

    Hi kingphy,

    Ok, thank you for this information. I am discussing your use-case internally and will get back to you.

    ~ Judiht

  • 0 in reply to Judith Mendez
    TI__Guru** 100560 points

    Hello Kingphy,

    I am not clear on what you want here. Which core on the AM62A do you want to write outputs to the wakeup UART? (i.e., Linux A53 cores, the DM-R5 core, a different core?)

    Also, are you looking for that core to be writing output to the wakeup UART at specific points in time during bootup? Or just during Linux runtime?

    Regards,

    Nick

  • 0 in reply to Nick Saulnier
    Intellectual 260 points

    I  want to write output to wakeup uart when boot tiboot3.bin and dm_firmware

  • +1 in reply to kingphy hozamon
    TI__Expert 8480 points

    Hi Kingphy,

    It is not clear what you want.

    My application is that DM-R5 monitor MCU-R5 and A53.And DM-R5 will printf log in wakeup uart.And MCU-UART ,SOC-UART are used for MCU and SOC.Because considerring POWERDomain.

    --> Here it seems like you want DM R5 to monitor and print to wakup_uart0, but it is already sending log to wakup_uart0.

    If I want to use wkupuart to printf log in tiboot3.bin,how do I configure it?

    --> Here it seems like you want to send u-boot log to wakup_uart0.

    Please clarify what is your trying to do, thanks.

    ~ Judith