On Wed, Jun 09, 2010 at 10:05:07AM +0300, Baruch Siach wrote:
> For details of the UART protocol see the i.MX25 Reference Manual, section 7.8
> "Serial Download protocol".
>
> Signed-off-by: Baruch Siach <baruch@xxxxxxxxxx>
> ---
> arch/arm/mach-imx/Kconfig | 5 +++++
> board/freescale-mx25-3-stack/3stack.c | 4 ++++
> board/freescale-mx25-3-stack/lowlevel_init.S | 5 +++++
> 3 files changed, 14 insertions(+), 0 deletions(-)
>
> diff --git a/arch/arm/mach-imx/Kconfig b/arch/arm/mach-imx/Kconfig
> index 419daab..40cebed 100644
> --- a/arch/arm/mach-imx/Kconfig
> +++ b/arch/arm/mach-imx/Kconfig
> @@ -319,6 +319,11 @@ config FREESCALE_MX25_3STACK_SDRAM_64MB_DDR2
> config FREESCALE_MX25_3STACK_SDRAM_128MB_MDDR
> bool "128 MB (mDDR)"
> endchoice
> +
> +config FREESCALE_MX25_3STACK_UART_BOOT
> + bool "Boot from UART"
> + depends on ARCH_IMX_INTERNAL_BOOT
> +
> endif
> endmenu
>
> diff --git a/board/freescale-mx25-3-stack/3stack.c b/board/freescale-mx25-3-stack/3stack.c
> index a657a47..081487a 100644
> --- a/board/freescale-mx25-3-stack/3stack.c
> +++ b/board/freescale-mx25-3-stack/3stack.c
> @@ -44,7 +44,11 @@ extern unsigned long _stext;
>
> void __naked __flash_header_start go(void)
> {
> +#if defined CONFIG_FREESCALE_MX25_3STACK_UART_BOOT
> + __asm__ (".word exception_vectors\n");
> +#else
> __asm__ __volatile__("b exception_vectors\n");
> +#endif
Do we need this change? I booted other i.MX SoCs without it. I really
like to keep this because it enables to jump to the first address if
booting second stage.
Sascha
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