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. > > This patch imports AR9331 MIPS24K coprocessor0 initialization > 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 | 44 ++++++++++++++++++++++++++ > 1 file changed, 44 insertions(+) > > diff --git a/arch/mips/mach-ath79/include/mach/pbl_macros.h b/arch/mips/mach-ath79/include/mach/pbl_macros.h > index c00dd28..810f49d 100644 > --- a/arch/mips/mach-ath79/include/mach/pbl_macros.h > +++ b/arch/mips/mach-ath79/include/mach/pbl_macros.h > @@ -179,4 +179,48 @@ > | AR933X_GPIO_FUNC_RSRV15, GPIO_FUNC > .endm > > +.macro hornet_mips24k_cp0_setup > + .set push > + .set noreorder > + > + /* > + * Clearing CP0 registers - This is generally required for the MIPS-24k > + * core used by Atheros. > + */ > + mtc0 zero, CP0_INDEX > + mtc0 zero, CP0_ENTRYLO0 > + mtc0 zero, CP0_ENTRYLO1 > + mtc0 zero, CP0_CONTEXT > + mtc0 zero, CP0_PAGEMASK > + mtc0 zero, CP0_WIRED > + mtc0 zero, CP0_INFO > + mtc0 zero, CP0_COUNT > + mtc0 zero, CP0_ENTRYHI > + mtc0 zero, CP0_COMPARE > + > + li t0, ST0_CU0 | ST0_ERL > + mtc0 t0, CP0_STATUS > + > + mtc0 zero, CP0_CAUSE > + mtc0 zero, CP0_EPC > + > + li t0, CONF_CM_UNCACHED > + mtc0 t0, CP0_CONFIG > + > + mtc0 zero, CP0_LLADDR > + mtc0 zero, CP0_WATCHLO > + mtc0 zero, CP0_WATCHHI > + mtc0 zero, CP0_XCONTEXT > + mtc0 zero, CP0_FRAMEMASK > + mtc0 zero, CP0_DIAGNOSTIC > + mtc0 zero, CP0_DEBUG > + mtc0 zero, CP0_DEPC > + mtc0 zero, CP0_PERFORMANCE > + mtc0 zero, CP0_ECC > + mtc0 zero, CP0_CACHEERR > + mtc0 zero, CP0_TAGLO > + > + .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
