From: u.kleine-koenig@pengutronix.de (Uwe Kleine-König)
To: linux-arm-kernel@lists.infradead.org
Subject: Single binary kernel for all i.MX
Date: Fri, 12 Nov 2010 16:53:42 +0100 [thread overview]
Message-ID: <20101112155342.GJ18358@pengutronix.de> (raw)
In-Reply-To: <AANLkTim7znztJgGvZ5ZsV=ei=_W4YpjU3-5zWonrQ9ME@mail.gmail.com>
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
--
Pengutronix e.K. | Uwe Kleine-K?nig |
Industrial Linux Solutions | http://www.pengutronix.de/ |
next prev parent reply other threads:[~2010-11-12 15:53 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-11-05 12:18 Single binary kernel for all i.MX Sascha Hauer
2010-11-05 12:29 ` Baruch Siach
2010-11-05 12:31 ` Sascha Hauer
2010-11-05 18:59 ` Eric Miao
2010-11-07 11:34 ` Sascha Hauer
2010-11-12 15:40 ` Shawn Guo
2010-11-12 15:53 ` Uwe Kleine-König [this message]
2010-11-12 17:29 ` Gadiyar, Anand
2010-11-12 18:50 ` Uwe Kleine-König
2010-11-13 15:30 ` Nicolas Pitre
2010-11-13 15:26 ` Nicolas Pitre
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