CPU1: failed to come online

[Chenyi_Luo]

Hello，

I meet a problem during the imx8qxp processor start up, the CPU1,2,3 fail to come online.

I use the imx-yocto-L5.4.24_2.1.0 version.

Is the problem related to the configuration of scfw?

Thanks

[Dhruvit]

Hi @Chenyi_Luo,

From the boot logs, it is found that you are using 1 GB DRAM.

1. Please make sure that you have followed the steps mentioned in 5.7 Adding OP-TEE support for a new board of i.MX Porting Guide and have set the correct value for CFG_DDR_SIZE.

2. Please consider the below change in /plat/imx/imx8qx/platform.mk in imx-atf  ( As existing value 0xfe000000 will overwrite 1 GB limit (0xC0000000))

      ifeq (${PLAT},imx8dx)
      BL32_BASE ?= 0x96000000
      else
     BL32_BASE ?= 0x96000000
     endif

3. Also make a similar change at /iMX8QX/soc.mak at imx-boot as below: 

       ifeq ($(SOC),iMX8DX)
       TEE_LOAD_ADDR ?= 0x96000000
       else ifeq ($(SOC),iMX8QX)
       TEE_LOAD_ADDR ?=  0x96000000
       endif

Thanks & Regards,
Dhruvit.

[Chenyi_Luo]

Hello @Dhruvit ,

Yes, we are using 1GB DDR now.

According to your reply, I adjusted the configuration of the memory size:

1.imx-atf/plat/imx/imx8qx/platform.mk

ifeq (${PLAT},imx8dx)
BL32_BASE              ?=      0x96000000
else
BL32_BASE              ?=      0x96000000
endif

2.imx-mkimage/iMX8QX/soc.mak

ifeq ($(SOC),iMX8DX)
TEE_LOAD_ADDR ?= 0x96000000
else ifeq ($(SOC),iMX8QX)
TEE_LOAD_ADDR ?= 0x96000000
endif

3.optee-os/core/arch/arm/plat-imx/conf.mk

 ifneq (,$(filter $(PLATFORM_FLAVOR),mx8qxpmek mx8qmmek))
 CFG_DDR_SIZE ?= 0x40000000
 CFG_UART_BASE ?= UART0_BASE
 endif

In addition, we also have some configuration about memory before:

4.uboot/include/configs/imx8qxp_mek.h

#ifdef CONFIG_TARGET_IMX8DX_MEK
#define PHYS_SDRAM_1_SIZE       0x40000000  /* 1 GB */
#define PHYS_SDRAM_2_SIZE       0x00000000  /* 0 GB */
#else
    #if 0
    #define PHYS_SDRAM_1_SIZE       0x80000000  /* 2 GB */
    /* LPDDR4 board total DDR is 3GB */
    #define PHYS_SDRAM_2_SIZE       0x40000000  /* 1 GB */
    #else
    /* total DDR is 1GB */
    #define PHYS_SDRAM_1_SIZE       0x40000000  /* 1 GB */
    #define PHYS_SDRAM_2_SIZE       0x00000000  /* 0 GB */
    #endif
#endif

The above four changes are all of our changes to the memory size.

If there is only the fourth change point, then CPU startup will be abnormal(CPU1: failed to come online).

But if all four change points take effect, the download will be abnormal.

It will stack at "SDPV: jump", as the 图片.png shows.

The uuu script is emmc.uuu.txt.

Why is this? Is it because we set it up incorrectly?

Thank you.

[Dhruvit · Accepted solution]

Hi @Chenyi_Luo ,

BL32_BASE value can be calculated as below for i.MX8QXP:

BL32_BASE = DRAM_BASE - 0x02000000 + DDR_SIZE

For 1 GB DRAM BL32_BASE can be configured to 0xBE000000.

Please change the value of BL32_BASE and TEE_LOAD_ADDR to 0xBE000000.

Please make sure that you have updated the DDR configuration in SCFW using i.MX 8/8X Family DDR Tools.

Thanks & Regards,

Dhruvit Vasavada

[Chenyi_Luo]

Hello,

We change the size of memory to 0xBE000000.

Now CPU can start normally.

Thank you.

[Dhruvit]

Hi @Chenyi_Luo 

Can I mark this case to close state?

Thanks & Regards

Dhruvit Vasavada

[Chenyi_Luo]

Hello，

Sure.

Thank you.