RTOS/AMIC110: MDIO register access issue

ArekLukasiak

Part Number: AMIC110

Tool/software: TI-RTOS

Hi,

I am able to access PHY registers by directly manipulating MDIO user access registers in debug mode. However, when I am trying to achieve the same effect using CSL_MDIO functions, the program always crashes during first operation that tries to access MDIO memory block (starting at 0x4A101000), with "no source available" error. For example, in CSL_MDIO_init function it happens within HW_WR_REG32, at this line:

uint32_t regVal = *(volatile uint32_t *) addr;

Screen from memory browser:

I would be grateful for any suggestions about what may cause that behavior.

Best regards,

A.Lukasiak

over 7 years ago

0 Biser Gatchev-XID over 7 years ago

TI__Guru**** 393215 points

The RTOS team have been notified. They will respond here.

0 Garrett Ding over 7 years ago

TI__Mastermind 43296 points

Hi,

Do you have the MMU entry for the MDIO memory block in your .cfg file?

var peripheralAttrs = {
type : Mmu.FirstLevelDesc_SECTION, // SECTION descriptor
tex: 0,
bufferable : false, // bufferable
cacheable : false, // cacheable
shareable : false, // shareable
noexecute : false, // not executable
};

/* MMU configuration for CPSW - Non bufferable| Non Cacheable */
var peripheralBaseAddr = 0x4A100000;
Mmu.setFirstLevelDescMeta(peripheralBaseAddr, peripheralBaseAddr, peripheralAttrs);

Regards,
Garrett

0 ArekLukasiak over 7 years ago in reply to Garrett Ding

Prodigy 190 points

Yes, I have CPSW entry.

Regards,

A.Łukasiak

0 Garrett Ding over 7 years ago in reply to ArekLukasiak

TI__Mastermind 43296 points

Hi,

I was thinking of the device AM335x with 'MDIO memory block (starting at 0x4A101000)'. Actually CPSW is not supported on AMIC110, and the address of MDIO in PRU_ICSS starts from 0x4A33_2400, so the MMU entry should look like:

var peripheralBaseAddr = 0x4A300000;
Mmu.setFirstLevelDescMeta(peripheralBaseAddr, peripheralBaseAddr, peripheralAttrs);

Regards,
Garrett

0 ArekLukasiak over 7 years ago in reply to Garrett Ding

Prodigy 190 points

Hi,

I confirmed that the program works correctly with 0x4A332400 as MDIO start address and MMU entry as the one above.

Thank you!

Best regards,
A.Lukasiak

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RTOS/AMIC110: MDIO register access issue