On 05.06.23 22:10, Denis Orlov wrote: > This allows using addresses from XKPHYS segment. This is needed as we > access hardware registers through this segment in 64BIT configuration, > but this also lets us peek/poke bigger memory address space using > commands that work with memory on 64BIT. > > With this commit, malta with 64-bit CPU finally boots into 64BIT barebox > in QEMU. > > Signed-off-by: Denis Orlov <denorl2009@xxxxxxxxx> Reviewed-by: Ahmad Fatoum <a.fatoum@xxxxxxxxxxxxxx> > --- > arch/mips/boot/start.S | 2 ++ > arch/mips/include/asm/pbl_macros.h | 11 +++++++++++ > 2 files changed, 13 insertions(+) > > diff --git a/arch/mips/boot/start.S b/arch/mips/boot/start.S > index 5f134f9ae9..30828ad9ef 100644 > --- a/arch/mips/boot/start.S > +++ b/arch/mips/boot/start.S > @@ -26,6 +26,8 @@ EXPORT(_start) > > mips_disable_interrupts > > + mips64_enable_64bit_addressing > + > copy_to_link_location _start > > stack_setup > diff --git a/arch/mips/include/asm/pbl_macros.h b/arch/mips/include/asm/pbl_macros.h > index 1fba690c8c..ce169a1554 100644 > --- a/arch/mips/include/asm/pbl_macros.h > +++ b/arch/mips/include/asm/pbl_macros.h > @@ -152,6 +152,17 @@ > .set pop > .endm > > + .macro mips64_enable_64bit_addressing > +#ifdef CONFIG_64BIT > + .set push > + .set noreorder > + mfc0 k0, CP0_STATUS > + or k0, ST0_KX > + mtc0 k0, CP0_STATUS > + .set pop > +#endif > + .endm > + > .macro mips_barebox_10h > .set push > .set noreorder -- Pengutronix e.K. | | Steuerwalder Str. 21 | http://www.pengutronix.de/ | 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |
