On 12/02/14 08:36, Albert ARIBAUD wrote:
Hi Albert,
On Thu, 12 Dec 2013 11:47:31 +0100, Albert ARIBAUD albert.u.boot@aribaud.net wrote:
Hi Marc,
On Sat, 7 Dec 2013 11:19:12 +0000, Marc Zyngier marc.zyngier@arm.com wrote:
The current non-sec switching code suffers from one major issue: it cannot run in secure RAM, as a large part of u-boot still needs to be run while we're switched to non-secure.
This patch reworks the whole HYP/non-secure strategy by:
- making sure the secure code is the *last* thing u-boot executes before entering the payload
- performing an exception return from secure mode directly into the payload
- allowing the code to be dynamically relocated to secure RAM before switching to non-secure.
This involves quite a bit of horrible code, specially as u-boot relocation is quite primitive.
Signed-off-by: Marc Zyngier marc.zyngier@arm.com
arch/arm/cpu/armv7/nonsec_virt.S | 161 +++++++++++++++++++-------------------- arch/arm/cpu/armv7/virt-v7.c | 59 +++++--------- arch/arm/include/asm/armv7.h | 10 ++- arch/arm/include/asm/secure.h | 26 +++++++ arch/arm/lib/bootm.c | 21 ++--- 5 files changed, 136 insertions(+), 141 deletions(-) create mode 100644 arch/arm/include/asm/secure.h
It seems like patch 07/13 does not apply properly on top of current ARM. Can you have a look? If a rebased V3 is needed, you can remove patch 01 from the list (or if it is simpler to you, keep it in and I'll just ignore it when applying).
I don't think there was a V3 for this so far; correct?
Correct. I've been lazy. I'll try to repost something by the end of the week.
Thanks,
M.