* Kevin Hilman <khilman@xxxxxxxxxxxxxxxxxxx> [090401 16:18]: > Tony Lindgren <tony@xxxxxxxxxxx> writes: > > > * Paul Walmsley <paul@xxxxxxxxx> [090401 12:04]: > >> On Wed, 1 Apr 2009, Syed Mohammed, Khasim wrote: > >> > >> > > -----Original Message----- > >> > > From: linux-omap-owner@xxxxxxxxxxxxxxx [mailto:linux-omap-owner@xxxxxxxxxxxxxxx] On Behalf Of > >> > > Gadiyar, Anand > >> > > Sent: Wednesday, April 01, 2009 1:55 PM > >> > > To: Russell King - ARM Linux > >> > > Cc: Tony Lindgren; linux-arm-kernel@xxxxxxxxxxxxxxxxxxxxxx; linux-omap@xxxxxxxxxxxxxxx > >> > > Subject: RE: [PATCH 3/4] ARM: OMAP3: Add support for 3430 SDP, v3 > >> > > > >> > > On Wed, Apr 01, 2009 at 12:18 AM, Russell King - ARM Linux wrote: > >> > > > On Tue, Mar 31, 2009 at 05:12:18PM +0530, Gadiyar, Anand wrote: > >> > > > > I could not run the 3430 SDP defconfig from mainline. The image hangs at > >> > > > > "Starting kernel ...". Enabling CONFIG_DEBUG_LL does not help. > >> > > > > >> > > > Did you add the necessary patch to kernel/printk.c ? > >> > > > > >> > > > >> > > Silly me, I had not done this (despite having read this so many times on this list). > >> > > > >> > > Here's what I get now after adding the patch. <snip> > > Not seeing this on overo at least. > > > > And my Beagle is booting fine with mainline and attached .config. <snip> Well turns out it's the same old bug again Juha tracked down earlier.. If CONFIG_DEBUG_SPINLOCK is set, and CONFIG_DEBUG_LL is not set, the IO does not get mapped. Juha's earlier patch is attached. Russell, got any better fixes in mind for this? Tony
>From c699464bd92629fda1062223467588fcb0e97bca Mon Sep 17 00:00:00 2001 From: Juha Yrjola <juha.yrjola@xxxxxxxxxxxxx> Date: Fri, 16 Jan 2009 16:00:50 +0200 Subject: [PATCH] ARM: Do early I/O mapping if spinlock debugging is enabled At least on OMAP, sched_clock() requires the I/O maps to be initialized. Spinlock debugging invokes sched_clock() very early. Signed-off-by: Juha Yrjola <juha.yrjola@xxxxxxxxxxxxx> Signed-off-by: Tony Lindgren <tony@xxxxxxxxxxx> diff --git a/arch/arm/kernel/head.S b/arch/arm/kernel/head.S index 21e17dc..1bc918c 100644 --- a/arch/arm/kernel/head.S +++ b/arch/arm/kernel/head.S @@ -282,7 +282,7 @@ __create_page_tables: .endif str r6, [r0] -#ifdef CONFIG_DEBUG_LL +#if defined(CONFIG_DEBUG_LL) || defined(CONFIG_DEBUG_SPINLOCK) ldr r7, [r10, #PROCINFO_IO_MMUFLAGS] @ io_mmuflags /* * Map in IO space for serial debugging.
