AM6548: PCIe Boot from NVMe M.2 SSD

Daisuke Maeda

Guru 20455 points

Part Number: AM6548
Other Parts Discussed in Thread: TDA4VM

Do AM6548 PCIe and ROM bootloader support booting from NVMe M.2 SSD?

Best regards,

Daisuke

over 6 years ago

0 Daisuke Maeda over 6 years ago

Guru 20455 points

Hi,

Daisuke Maeda said:

Do AM6548 PCIe and ROM bootloader support booting from NVMe M.2 SSD?

I have one more related question.

Is PCIe boot from NVMe M.2 SSD supported on Linux?
In other words, does the latest Linux processor SDK support MLO (SBL) loading U-Boot from NVMe M.2 SSD?

Best regards,

Daisuke

0 Keerthy J over 6 years ago in reply to Daisuke Maeda

TI__Guru**** 170930 points

Hi Daisuke,

http://software-dl.ti.com/jacinto7/esd/processor-sdk-linux-jacinto7/latest/exports/docs/linux/Foundational_Components_U-Boot.html#general-information

In section titled: Compiling R5 and ARM64 images

The J721E EVM refers to TDA4VM. Supported modes are: SD/eMMC/OSPI/UART/Hyperflash/USB DFU

No support for PCIe boot.

So the answer is No to both of your questions.

Please resolve the thread if there are no further questions.

- Keerthy

0 Daisuke Maeda over 6 years ago in reply to Keerthy J

Guru 20455 points

Hi Keerthy-san,

Thank you for your reply.

Daisuke Maeda said:

Do AM6548 PCIe and ROM bootloader support booting from NVMe M.2 SSD?

Could you give me an answer to my first question?

If AM6548 supports it, a custom MLO (SBL) can load U-Boot from NVMe M.2 SSD and future SDK releases may support PCIe boot.

Best regards,

Daisuke

0 Keerthy J over 6 years ago in reply to Daisuke Maeda

TI__Guru**** 170930 points

Hi Daisuke,

The answer i gave is common for both AM654 & J721e. The link i provided above describes
all the supported boot modes from RoM & PCIe is not supported. Hope you can resolve
the question.

- Keerthy

0 Daisuke Maeda over 6 years ago in reply to Keerthy J

Guru 20455 points

Hi Keerthy-san,

Thank you for your reply.

The link you provided should indicate that the software (MLO and U-Boot) does not support PCIe boot.

C6748 (hardware and ROM bootloader) supports PCIe Boot as described in TRM.

Does the PCIe Boot support booting from NVMe M.2 SSDs?

Best regards,

Daisuke

0 Keerthy J over 6 years ago in reply to Daisuke Maeda

TI__Guru**** 170930 points

Hi Daisuke,

I checked with the RoM Expert. ROM configuration for PCIe boot will be endpoint
and it can communicate with Root Complex and will not support boot for PCIe SSD.

Hope the answer is clear now? If yes please resolve the thread.

- Keerthy

0 Daisuke Maeda over 6 years ago in reply to Keerthy J

Guru 20455 points

Hi Keerthy-san,

Thank you for your reply.

I have one more related question.

Does U-Boot support booting Linux kernel from NVMe M.2 SSD?

U-Boot contains the following source codes, so it should support to access NVMe M.2 SSD.

drivers/nvme/nvme.c
drivers/pci/pcie_dw_ti.c

The following links describe how U-Boot boots Linux kernel from an SD card or a USB storage.

https://software-dl.ti.com/processor-sdk-linux-rt/esd/AM65X/latest/exports/docs/linux/Foundational_Components_U-Boot.html#booting-linux-from-sd-card-or-emmc
https://software-dl.ti.com/processor-sdk-linux-rt/esd/AM65X/latest/exports/docs/linux/Foundational_Components_U-Boot.html#booting-linux-from-usb-storage

Can U-Boot boot Linux kernel from NVMe M.2 SSD in a similar way?

Best regards,

Daisuke

0 Keerthy J over 6 years ago in reply to Daisuke Maeda

TI__Guru**** 170930 points

Daisuke,

Booting to Linux kernel is not supported on our SDK. This needs multiple
driver support which are not present.

- Keerthy

0 Daisuke Maeda over 6 years ago in reply to Keerthy J

Guru 20455 points

Hi Keerthy-san,

Thank you for your reply.

Our customer wants to boot from NVMe M.2 SSD.

Are there any plans that a future released LInux SDK supports booting from NVMe M.2 SSD?

Are there any plans that a future released processor (ROM bootloader) after AM65x supports booting from NVMe M.2 SSD?

Best regards,

Daisuke

0 Keerthy J over 6 years ago in reply to Daisuke Maeda

TI__Guru**** 170930 points

Hi Daisuke-San,

No immediate plans on the above. Not targeted for next upcoming 7.1 release.

Hope you can resolve the thread if there are no further questions.

- Keerthy

0 Daisuke Maeda over 6 years ago in reply to Keerthy J

Guru 20455 points

Hi Keerthy-san,

Thank you for your reply.

Please let me know when there is any update on this.

Best regards,

Daisuke

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AM6548: PCIe Boot from NVMe M.2 SSD