Thanks. At present, not calling this hyp_install function seems to be ok Should I have used a pre-bootloader? What is the barebox/ARM way I should have followed? I come from PPC and not familiar yet with the PBL. > -----Original Message----- > From: Lucas Stach [mailto:l.stach@xxxxxxxxxxxxxx] > Sent: 02 May 2019 11:22 > To: Barbier, Renaud <renaud.barbier@xxxxxxxxx>; > barebox@xxxxxxxxxxxxxxxxxxx > Subject: Re: cortex-a9 boot issue > > > > [EXTERNAL SOURCE]: This email originated from outside Abaco. DO NOT CLICK > a link or open an attachment unless you know the content is safe and are > expecting it from the sender. If in doubt, contact the sender separately to > verify. > > Hi Renaud, > > Am Mittwoch, den 01.05.2019, 10:32 +0000 schrieb Barbier, Renaud: > > 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? > > No, this code was just not written with XIP in mind and I'm currently > no sure how to improve this, given how early this code needs to be > executed. > > Regards, > Lucas _______________________________________________ barebox mailing list barebox@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/barebox
