* [U-Boot] Secure memory
@ 2015-11-06 22:10 York Sun
2015-11-09 23:54 ` York Sun
0 siblings, 1 reply; 3+ messages in thread
From: York Sun @ 2015-11-06 22:10 UTC (permalink / raw)
To: u-boot
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
^ permalink raw reply [flat|nested] 3+ messages in thread
* [U-Boot] Secure memory
2015-11-06 22:10 [U-Boot] Secure memory York Sun
@ 2015-11-09 23:54 ` York Sun
2015-11-10 12:17 ` Albert ARIBAUD
0 siblings, 1 reply; 3+ messages in thread
From: York Sun @ 2015-11-09 23:54 UTC (permalink / raw)
To: u-boot
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
^ permalink raw reply [flat|nested] 3+ messages in thread
* [U-Boot] Secure memory
2015-11-09 23:54 ` York Sun
@ 2015-11-10 12:17 ` Albert ARIBAUD
0 siblings, 0 replies; 3+ messages in thread
From: Albert ARIBAUD @ 2015-11-10 12:17 UTC (permalink / raw)
To: u-boot
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,
--
Albert.
^ permalink raw reply [flat|nested] 3+ messages in thread
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2015-11-06 22:10 [U-Boot] Secure memory York Sun
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