[U-Boot] Secure memory
Albert,
I am trying to separate secure memory and non-secure memory for ARMv8. Before I go too far, I'd like to check with you to see if there is already some code implemented.
Basically what I am trying to do is to mark most DDR memory non-secure because we have some non-secure masters such as SDHC DMA. I also want to reserve some memory for TrustZone application. In order to do that, I need to put the MMU tables in secure memory. I will need to modify common/board_f.c to process reserve_mmu() differently for secure and non-secure mode.
Please let me know if running u-boot in non-secure mode is a bad idea.
York
On 11/06/2015 02:10 PM, York Sun wrote:
Albert,
I am trying to separate secure memory and non-secure memory for ARMv8. Before I go too far, I'd like to check with you to see if there is already some code implemented.
Basically what I am trying to do is to mark most DDR memory non-secure because we have some non-secure masters such as SDHC DMA. I also want to reserve some memory for TrustZone application. In order to do that, I need to put the MMU tables in secure memory. I will need to modify common/board_f.c to process reserve_mmu() differently for secure and non-secure mode.
Please let me know if running u-boot in non-secure mode is a bad idea.
I didn't hear from you so I went ahead to implement the change. Please review the patches, coming soon.
York
Hello York,
On Mon, 9 Nov 2015 15:54:39 -0800, York Sun yorksun@freescale.com wrote:
I didn't hear from you so I went ahead to implement the change. Please review the patches, coming soon.
Will do.
[BTW, I have no firm opinion on running U-Boot in secure or non-secure mode -- I'm from the generation to whom a bootlader has, or should have, all privileges, including the one of running non-secure. :)]
York
Amicalement,
participants (2)
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Albert ARIBAUD -
York Sun