Regression: not booting anymore on OMAP35xx

[Luca Ceresoli]

Sascha Hauer wrote:
> Hi Luca,
> 
> On Tue, Jun 22, 2010 at 02:26:11PM +0200, Luca Ceresoli wrote:
> > Hi,
> > 
> > recent versions of barebox do not boot anymore on OMAP3530 (Cortex-A8).
> > 
> > I build barebox with omap3530_beagle_per_uart_defconfig, and load it
> > using pserial from Nishanth Menon's omap-u-boot-utils
> > (http://github.com/nmenon/omap-u-boot-utils).
> > 
> > Symptoms:
> > pserial detects the OMAP ID, then starts sending via UART.
> > The transfer apparently gets completed (obvious as there is no control),
> > but after that the UART line to the target is totally mute.
> > 
> > This happens since commit:
> >  78104ae arm: reimplement startup code in C
> > 
> > And is still happening on current master:
> >  ea5230c i2c: fix adapter_list manipulation
> 
> Seems that I lost the call to arch_init_lowlevel. Does the following
> patch help?

I'm afraid it doesn't seem to.
It fails with the same symptoms.

Luca

> 
> 
> diff --git a/arch/arm/cpu/start.c b/arch/arm/cpu/start.c
> index eea7dcf..91d2ccd 100644
> --- a/arch/arm/cpu/start.c
> +++ b/arch/arm/cpu/start.c
> @@ -50,6 +50,8 @@ void __naked __bare_init reset(void)
>  {
>  	uint32_t r;
>  
> +	arch_init_lowlevel();
> +
>  	/* set the cpu to SVC32 mode */
>  	__asm__ __volatile__("mrs %0, cpsr":"=r"(r));
>  	r &= ~0x1f;
> diff --git a/arch/arm/mach-omap/omap3_core.S b/arch/arm/mach-omap/omap3_core.S
> index 7337d4c..d904231 100644
> --- a/arch/arm/mach-omap/omap3_core.S
> +++ b/arch/arm/mach-omap/omap3_core.S
> @@ -92,7 +92,7 @@ next:
>  arch_start:
>  	.word	arch_init_lowlevel
>  barebox_start:
> -	.word	_start
> +	.word	exception_vectors
>  SRAM_INTVECT:
>  	.word	OMAP_SRAM_INTVECT
> 
> -- 
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