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Date: Sun, 26 Feb 2012 13:57:00 -0800 From: Olof Johansson <olof@...om.net> To: Colin Cross <ccross@...roid.com> Cc: Peter De Schrijver <pdeschrijver@...dia.com>, Stephen Warren <swarren@...dia.com>, Russell King <linux@....linux.org.uk>, Gary King <gking@...dia.com>, Arnd Bergmann <arnd@...db.de>, linux-tegra@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org Subject: Re: [PATCH v3 05/10] ARM: tegra: rework Tegra secondary CPU core bringup Hi, On Mon, Feb 20, 2012 at 03:04:57PM -0800, Colin Cross wrote: > On Thu, Feb 9, 2012 at 3:47 PM, Peter De Schrijver > <pdeschrijver@...dia.com> wrote: > > Prepare the Tegra secondary CPU core bringup code for other Tegra variants. > > The reset handler is also generalized to allow for future introduction of > > powersaving modes which turn off the CPU cores. > > > > Based on work by: > > > > Scott Williams <scwilliams@...dia.com> > > Chris Johnson <cwj@...dia.com> > > Colin Cross <ccross@...roid.com> > > > > Signed-off-by: Peter De Schrijver <pdeschrijver@...dia.com> > > --- > <snip> > > > diff --git a/arch/arm/mach-tegra/headsmp.S b/arch/arm/mach-tegra/headsmp.S > > index b5349b2..7973f1c 100644 > > --- a/arch/arm/mach-tegra/headsmp.S > > +++ b/arch/arm/mach-tegra/headsmp.S > > <snip> > > > @@ -47,15 +64,116 @@ ENTRY(v7_invalidate_l1) > > mov pc, lr > > ENDPROC(v7_invalidate_l1) > > > > + > > ENTRY(tegra_secondary_startup) > > - msr cpsr_fsxc, #0xd3 > > bl v7_invalidate_l1 > > - mrc p15, 0, r0, c0, c0, 5 > > - and r0, r0, #15 > > - ldr r1, =0x6000f100 > > - str r0, [r1] > > -1: ldr r2, [r1] > > - cmp r0, r2 > > - beq 1b > > + mov32 r0, 0xC5ACCE55 > > + mcr p14, 0, r0, c7, c12, 6 > > One minor nit, you should comment that this is enabling coresight. Since it's trivial, I did it when I applied the patch here instead of having Peter respin or add it separately. -Olof -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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