Single binary kernel for all i.MX

[Uwe Kleine-König]

Hi Shawn,

On Fri, Nov 12, 2010 at 11:40:41PM +0800, Shawn Guo wrote:
> I'm studying at the implementation.  Can you please help me understand
> how "addruart" in plat-mxc/include/mach/debug-macro.S works for single
> image?
> 
>         .macro  addruart, rp, rv
>         ldr     \rp, =UART_PADDR        @ physical
>         ldr     \rv, =UART_VADDR        @ virtual
>         .endm
> 
> We have this macro to get physical base address of UART.  However
> UART_PADDR is defined as MX?_UART1_BASE_ADDR depending on
> CONFIG_ARCH_MX*.  When all CONFIG_ARCH_MX* get defined in single image
> case, how does UART_PADDR work for all CONFIG_ARCH_MX*?
In a kernel that supports more than one SoC, DEBUG_LL won't work.  This
is generally OK, because DEBUG_LL is only needed when bringing up a
machine.  Therefor you can use a tailored kernel that only supports your
shiny new machine.

Uwe

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Pengutronix e.K.                           | Uwe Kleine-König            |
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