On Thu, Feb 25, 2016 at 10:14 AM, Antony Pavlov <antonynpavlov@xxxxxxxxx> wrote: > U-Boot_mod is a popular bootloader for Atheros AR93xx chips, > please see https://github.com/pepe2k/u-boot_mod for details. > > It's reasonable to import some lowlevel AR9331 initialization > code from U-Boot_mod. > > AR9331 (Hornet) 1.1 currently needs an additional > reset at 1st boot. This patch imports necessary code > from u-boot_mod/u-boot/cpu/mips/start_bootstrap.S. > > Signed-off-by: Antony Pavlov <antonynpavlov@xxxxxxxxx> Reviewed-by: Yegor Yefremov <yegorslists@xxxxxxxxxxxxxx> > --- > arch/mips/mach-ath79/include/mach/pbl_macros.h | 43 ++++++++++++++++++++++++++ > 1 file changed, 43 insertions(+) > > diff --git a/arch/mips/mach-ath79/include/mach/pbl_macros.h b/arch/mips/mach-ath79/include/mach/pbl_macros.h > index 810f49d..24cfd60 100644 > --- a/arch/mips/mach-ath79/include/mach/pbl_macros.h > +++ b/arch/mips/mach-ath79/include/mach/pbl_macros.h > @@ -223,4 +223,47 @@ > .set pop > .endm > > +.macro hornet_1_1_war > + .set push > + .set noreorder > + > +/* > + * WAR: Hornet 1.1 currently need a reset once we boot to let the resetb has > + * enough time to stable, so that trigger reset at 1st boot, system team > + * is investigaing the issue, will remove in short > + */ > + > + li t7, 0xbd000000 > + lw t8, 0(t7) > + li t9, 0x12345678 > + > + /* if value of 0xbd000000 != 0x12345678, go to do_reset */ > + bne t8, t9, do_reset > + nop > + > + li t9, 0xffffffff > + sw t9, 0(t7) > + b normal_path > + nop > + > +do_reset: > + /* put 0x12345678 into 0xbd000000 */ > + sw t9, 0(t7) > + > + /* reset register 0x1806001c */ > + li t7, 0xb806001c > + lw t8, 0(t7) > + /* bit24, fullchip reset */ > + li t9, 0x1000000 > + or t8, t8, t9 > + sw t8, 0(t7) > + > +do_reset_loop: > + b do_reset_loop > + nop > + > +normal_path: > + .set pop > +.endm > + > #endif /* __ASM_MACH_ATH79_PBL_MACROS_H */ > -- > 2.7.0 > _______________________________________________ barebox mailing list barebox@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/barebox
