From: "Barbier, Renaud" <renaud.barbier@abaco.com>
To: "barebox@lists.infradead.org" <barebox@lists.infradead.org>
Subject: cortex-a9 boot issue
Date: Wed, 1 May 2019 10:32:47 +0000 [thread overview]
Message-ID: <BYAPR16MB27449301E98456E00CC0EE32913B0@BYAPR16MB2744.namprd16.prod.outlook.com> (raw)
I have added support for a cortex-a9 off the master branch.
I am seeing an issue to boot to the prompt found in the function hyp_install. The assembly code is as follows:
mrs r12, cpsr
and r12, r12, #MODE_MASK
@ Save the initial CPU state
adr r0, .L__boot_cpu_mode_offset
ldr r1, [r0]
str r12, [r0, r1] ===> I get an exception here because the register r12 is being written to [r0 + r1] which points to the SPI NOR boot flash.
Commenting out the call to all functions calling hyp_install, barebox does get to the prompt.
Is there something I could be missing that would put the __boot_cpu_mode variable in a writable area?
Cheers,
Renaud
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next reply other threads:[~2019-05-01 10:32 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-05-01 10:32 Barbier, Renaud [this message]
2019-05-02 10:21 ` Lucas Stach
2019-05-02 13:16 ` Barbier, Renaud
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