Debug imx8 M4 on DRAM with Eclipse

biafra — Wed, 21 Dec 2022 14:42:24 GMT

Hi everyone,

I'm working on a custom board based on imx8m mini and I need to develop an application on the M4 core.
I'm testing a very simple program that blinks a led. I started from the example found on the SDK (v 2.12.1).

If I run the program on TCM I can work fine in all the cases I use: following the AN https://www.nxp.com/docs/en/application-note/AN5317.pdf I can start the application from U-Boot (with bin file), I can load it from Linux (with elf file) and I can debug it using Eclipse or Iar.

If I compile and link the same application to run from DRAM, I can start the application from U-Boot, but I can't load it from Linux nor I can't debug it using Eclipse or Iar.

In Eclipse for the TCM I use the following memory linker parameters:

MEMORY { m_interrupts (RX) : ORIGIN = 0x1FFE0000, LENGTH = 0x00000240 m_text (RX) : ORIGIN = 0x1FFE0240, LENGTH = 0x0001FDC0 m_data (RW) : ORIGIN = 0x20000000, LENGTH = 0x00020000 m_data2 (RW) : ORIGIN = 0x80000000, LENGTH = 0x01000000 }

For DRAM:

MEMORY { m_interrupts (RX) : ORIGIN = 0x77000000, LENGTH = 0x00000240 m_text (RX) : ORIGIN = 0x77000240, LENGTH = 0x001FFDC0 m_data (RW) : ORIGIN = 0x77200000, LENGTH = 0x00200000 m_data2 (RW) : ORIGIN = 0x77400000, LENGTH = 0x00C00000 }

If I run the application from Linux I get this errors:

[ 68.269072] remoteproc remoteproc0: powering up imx-rproc [ 68.314950] remoteproc remoteproc0: Booting fw image BlinkLED_DDR77.elf, size 3294348 [ 68.322908] remoteproc remoteproc0: bad phdr da 0x77000000 mem 0x240 [ 68.329306] remoteproc remoteproc0: Failed to load program segments: -22 [ 68.336859] remoteproc remoteproc0: Boot failed: -22

The same application (bin) launched from U-Boot works as expected.

If I try to debug the application using Eclipse, after reaching main(), I get continuously:

... Starting target CPU... ...Breakpoint reached @ address 0x77000EBA Reading common registers: R0, R1, R2, R3, R4, R5, R6, R7, R8, R9, R10, R11, R12, SP, LR, PC, XPSR Starting target CPU... ...Breakpoint reached @ address 0x77000EBA Reading common registers: R0, R1, R2, R3, R4, R5, R6, R7, R8, R9, R10, R11, R12, SP, LR, PC, XPSR Starting target CPU... ...Breakpoint reached @ address 0x77000EBA ...

I can't pause the execution, I can only close the connection.

What I have to do to load the application from Linux and to debug it in Eclipse running from DRAM?

Many thanks
Biafra

i.MX ProcessorsのトピックDebug imx8 M4 on DRAM with Eclipse

Debug imx8 M4 on DRAM with Eclipse