Hi Andre, On Tue, 2 Apr 2013 17:43:36 +0200, Andre Przywara <andre.przyw...@linaro.org> wrote:
> The KVM and Xen hypervisors for the Cortex-A15 virtualization > implementation need to be entered in HYP mode. Should the primary > board firmware already enter HYP mode (Calxeda firmware does that), > we should not deliberately drop back to SVC mode. > Since U-boot does not use the MMU, running in HYP mode is just fine. > > Signed-off-by: Andre Przywara <andre.przyw...@linaro.org> > --- > arch/arm/cpu/armv7/start.S | 10 +++++++--- > 1 file changed, 7 insertions(+), 3 deletions(-) > > diff --git a/arch/arm/cpu/armv7/start.S b/arch/arm/cpu/armv7/start.S > index 36a4c3c..95c8a95 100644 > --- a/arch/arm/cpu/armv7/start.S > +++ b/arch/arm/cpu/armv7/start.S > @@ -126,11 +126,15 @@ IRQ_STACK_START_IN: > reset: > bl save_boot_params > /* > - * set the cpu to SVC32 mode > + * disable interrupts (FIQ and IRQ), also set the cpu to SVC32 mode, > + * except if in HYP mode already > */ > mrs r0, cpsr > - bic r0, r0, #0x1f > - orr r0, r0, #0xd3 > + and r1, r0, #0x1f @ mask mode bits > + teq r1, #0x1a @ test for HYP mode > + bicne r0, r0, #0x1f @ clear all mode bits > + orrne r0, r0, #0x13 @ set SVC mode > + orr r0, r0, #0xc0 @ disable FIQ and IRQ > msr cpsr,r0 > > /* Applied to u-boot-arm/master, thanks! Amicalement, -- Albert. _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
