* Nicolas Pitre <nicolas.pitre@xxxxxxxxxx> [121005 18:33]: > On Fri, 5 Oct 2012, Tony Lindgren wrote: > > > * Tony Lindgren <tony@xxxxxxxxxxx> [121005 16:27]: > > > * Russell King - ARM Linux <linux@xxxxxxxxxxxxxxxx> [121005 16:10]: > > > > On Fri, Oct 05, 2012 at 01:08:22PM -0700, Tony Lindgren wrote: > > > > > Just bisected this down in linux-next for breaking booting of > > > > > my omap2420 ARMv6 based n8x0.. > > > > > > > > > > > --- a/arch/arm/kernel/head.S > > > > > > +++ b/arch/arm/kernel/head.S > > > > > > @@ -83,8 +83,12 @@ ENTRY(stext) > > > > > > THUMB( .thumb ) @ switch to Thumb now. > > > > > > THUMB(1: ) > > > > > > > > > > > > - setmode PSR_F_BIT | PSR_I_BIT | SVC_MODE, r9 @ ensure svc mode > > > > > > - @ and irqs disabled > > > > > > +#ifdef CONFIG_ARM_VIRT_EXT > > > > > > + bl __hyp_stub_install > > > > > > +#endif > > > > > > + @ ensure svc mode and all interrupts masked > > > > > > + safe_svcmode_maskall r9 > > > > > > + > > > > > > mrc p15, 0, r9, c0, c0 @ get processor id > > > > > > bl __lookup_processor_type @ r5=procinfo r9=cpuid > > > > > > movs r10, r5 @ invalid processor (r5=0)? > > > > > > > > > > ..and looks like undoing this part fixes it. Any ideas? > > > > > > > > > > I quickly tried disabling ARCH_OMAP3 and ARCH_OMAP4 so it's > > > > > ARMv6 but that does not help. > > > > The same kernel boots on 2430sdp, which is the same ARMv6 core > > as 2430 if I remember correctly. So this hints that it has something > > to do with the bits set differently by the bootloader? > > Possibly. > > What if you apply this on top: > > diff --git a/arch/arm/include/asm/assembler.h b/arch/arm/include/asm/assembler.h > index 683a1e6b60..b276c26e19 100644 > --- a/arch/arm/include/asm/assembler.h > +++ b/arch/arm/include/asm/assembler.h > @@ -254,8 +254,7 @@ > mov lr , \reg > and lr , lr , #MODE_MASK > cmp lr , #HYP_MODE > - orr \reg , \reg , #PSR_A_BIT | PSR_I_BIT | PSR_F_BIT > - bic \reg , \reg , #MODE_MASK > + mov \reg , #PSR_A_BIT | PSR_I_BIT | PSR_F_BIT > orr \reg , \reg , #SVC_MODE > THUMB( orr \reg , \reg , #PSR_T_BIT ) > msr spsr_cxsf, \reg > > > Thanks but that does not seem to help. Regards, Tony -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
