Regression: not booting anymore on OMAP35xx

[Sascha Hauer]

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?


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

-- 
Pengutronix e.K.                           |                             |
Industrial Linux Solutions                 | http://www.pengutronix.de/  |
Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0    |
Amtsgericht Hildesheim, HRA 2686           | Fax:   +49-5121-206917-5555 |