On Thu, Jun 02, 2016 at 10:06:50AM +0200, Raphael Poggi wrote: > This patch adds arm64 specific codes, which are: > - exception support > - cache support > - rework Makefile to support arm64 > > Signed-off-by: Raphael Poggi <poggi.r...@gmail.com> > --- > arch/arm/cpu/Makefile | 17 ++++- > arch/arm/cpu/cache-armv8.S | 168 > +++++++++++++++++++++++++++++++++++++++++++ > arch/arm/cpu/cache.c | 19 +++++ > arch/arm/cpu/exceptions_64.S | 127 ++++++++++++++++++++++++++++++++ > arch/arm/cpu/interrupts.c | 47 ++++++++++++ > arch/arm/cpu/lowlevel.S | 38 ++++++++++ > arch/arm/include/asm/cache.h | 9 +++ > 7 files changed, 423 insertions(+), 2 deletions(-) > create mode 100644 arch/arm/cpu/cache-armv8.S > create mode 100644 arch/arm/cpu/exceptions_64.S > > --- a/arch/arm/cpu/lowlevel.S > +++ b/arch/arm/cpu/lowlevel.S > @@ -3,6 +3,7 @@ > #include <asm/system.h> > > .section ".text_bare_init_","ax" > +#if __LINUX_ARM_ARCH__ <= 7 > ENTRY(arm_cpu_lowlevel_init) > /* set the cpu to SVC32 mode, mask irq and fiq */ > mrs r12, cpsr > @@ -56,3 +57,40 @@ ENTRY(arm_cpu_lowlevel_init) > > mov pc, lr > ENDPROC(arm_cpu_lowlevel_init) > +#else > +ENTRY(arm_cpu_lowlevel_init) > + adr x0, vectors > + mrs x1, CurrentEL > + cmp x1, #0xC /* Check EL3 state */ > + b.eq 1f > + cmp x1, #0x8 /* Check EL2 state */ > + b.eq 2f > + cmp x1, #0x4 /* Check EL1 state */ > + b.eq 3f > + > +1: > + msr vbar_el3, x0 > + mov x0, #1 /* Non-Secure EL0/1 */ > + orr x0, x0, #(1 << 10) /* 64-bit EL2 */ > + msr scr_el3, x0 > + msr cptr_el3, xzr > + b done > + > +2: > + msr vbar_el2, x0 > + mov x0, #0x33ff /* Enable FP/SIMD */ > + msr cptr_el2, x0 > + b done > + > + > +3: > + msr vbar_el1, x0 > + mov x0, #(3 << 20) /* Enable FP/SIMD */ > + msr cpacr_el1, x0 > + b done > + > +done: > + ret > + > +ENDPROC(arm_cpu_lowlevel_init) > +#endif
Better create a lowlevel64.S? The code is completely different anyway. Sascha -- Pengutronix e.K. | | Industrial Linux Solutions | http://www.pengutronix.de/ | Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 | _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox
