On Wed, 9 Aug 2017 14:58:53 -0400 Gaël PORTAY <gael.por...@savoirfairelinux.com> wrote:
> Hi, > > On Wed, Aug 09, 2017 at 08:05:57AM +0200, Oleksij Rempel wrote: > > Am 09.08.2017 um 06:13 schrieb Gaël PORTAY: > > > Dear maintainers, > > > > > > I came accross this issue when I was trying to add support for a new MIPS > > > board. > > > > Just out of curiosity, what MIPS board are you working on? If it is not > > a secret :) > > > > I am working on VoCore2[1]; it is a board based on a mediatek mt7628 CPU. > > I am doing this to learn myself how works barebox Please see this branch for mt7628: https://github.com/frantony/barebox/tree/20160815.mediatek > > Offtopic: For now it is booting on a really really old version of u-boot. I am > able de boot barebox from u-boot. I had to hack the mips_disable_interrupts to > remove the reset of flag ERL in CP0; but I don't know why yet. This flag is > supposed to be set when CPU reboots; but because I am running barebox from a > the > command go of u-boot, this flag is unset. > > Are you able to re-run barebox from barebox on your MIPS board? > > .macro mips_disable_interrupts > .set push > .set noreorder > mfc0 k0, CP0_STATUS > - li k1, ~(ST0_ERL | ST0_IE) > + li k1, ~ST0_IE > and k0, k1 > mtc0 k0, CP0_STATUS > .set pop > .endm > > For now, I have splitted mips_disable_interrupts into two macros. The second > macro mips_reset_error_level checks if the ERL flag is armed before resetting > it > to 0. > > .macro mips_reset_error_level > .set push > .set noreorder > mfc0 k0, CP0_STATUS > li k1, ST0_ERL > and k1, k0 > bne k1, zero, 1f > li k1, ~(ST0_ERL) > and k0, k1 > mtc0 k0, CP0_STATUS > 1: .set pop > .endm > > But I don't know if this is the right thing to do. > > [1]: > https://www.indiegogo.com/projects/vocore2-4-coin-sized-linux-computer-with-wifi#/ > > _______________________________________________ > barebox mailing list > barebox@lists.infradead.org > http://lists.infradead.org/mailman/listinfo/barebox -- Best regards, Antony Pavlov _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox
