On Tue, Jan 26, 2010 at 05:04:03PM +0800, Wu Zhangjin wrote:
> This patch adds a new DEBUG_ZBOOT option to allow the developers to
> debug the compressed kernel support for a new board.
>
> Signed-off-by: Wu Zhangjin <wuzhangjin@gmail.com>
> ---
> arch/mips/Kconfig.debug | 18 ++++++++++++++++++
> arch/mips/boot/compressed/Makefile | 2 ++
> 2 files changed, 20 insertions(+), 0 deletions(-)
>
> diff --git a/arch/mips/Kconfig.debug b/arch/mips/Kconfig.debug
> index d2b88a0..b3e20f4 100644
> --- a/arch/mips/Kconfig.debug
> +++ b/arch/mips/Kconfig.debug
> @@ -102,4 +102,22 @@ config RUNTIME_DEBUG
> arch/mips/include/asm/debug.h for debugging macros.
> If unsure, say N.
>
> +config DEBUG_ZBOOT
> + bool "Enable compressed kernel support debugging"
> + depends on SYS_SUPPORTS_ZBOOT_UART16550
This should probably depend on DEBUG_KERNEL also.
> + help
> + If you want to add compressed kernel support to a new board, and the
> + board supports uart16550 compatible serial port, please select
> + SYS_SUPPORTS_ZBOOT_UART16550 for your board and enable this option to
> + debug it.
> +
> + If your board doesn't support uart16550 compatible serial port, you
> + can try to select SYS_SUPPORTS_ZBOOT and use the other methods to
> + debug it. for example, add a new serial port support just as
> + arch/mips/boot/compressed/uart-16550.c does.
> +
> + After the compressed kernel support works, please disable this option
> + to reduce the kernel image size and speed up the booting procedure a
> + little.
> +
> endmenu
> diff --git a/arch/mips/boot/compressed/Makefile
> b/arch/mips/boot/compressed/Makefile
> index 91a57a6..68e5db8 100644
> --- a/arch/mips/boot/compressed/Makefile
> +++ b/arch/mips/boot/compressed/Makefile
> @@ -32,7 +32,9 @@ KBUILD_AFLAGS := $(LINUXINCLUDE) $(KBUILD_AFLAGS)
> -D__ASSEMBLY__ \
>
> obj-y := $(obj)/head.o $(obj)/decompress.o $(obj)/dbg.o
>
> +ifdef CONFIG_DEBUG_ZBOOT
> obj-$(CONFIG_SYS_SUPPORTS_ZBOOT_UART16550) += $(obj)/uart-16550.o
> +endif
DEBUG_ZBOOT already depends on SYS_SUPPORTS_ZBOOT_UART16550 so this can be
simplified into just obj-$(CONFIG_DEBUG_ZBOOT) and no ifdef.
Ralf
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