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MIPS: Make the debugging of compressed kernel configurable

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This patch adds a new DEBUG_ZBOOT option to allow the users to enable it
to debug the compressed kernel support for a new board and this optoin
should be disabled to reduce the kernel image size and speed up the
kernel booting procedure when the compressed kernel support is stable.

Signed-off-by: Wu Zhangjin <wuzhangjin@gmail.com>
To: Ralf Baechle <ralf@linux-mips.org>
Cc: Manuel Lauss <manuel.lauss@googlemail.com>
Cc: linux-mips@linux-mips.org
Patchwork: http://patchwork.linux-mips.org/patch/918/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Wu Zhangjin 2010-01-31 20:39:40 +08:00 committed by Ralf Baechle
parent b66bb6090d
commit f86a69b15f
2 changed files with 21 additions and 0 deletions
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19
arch/mips/Kconfig.debug
View File

@ -102,4 +102,23 @@ 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 DEBUG_KERNEL && SYS_SUPPORTS_ZBOOT
default n
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

2
arch/mips/boot/compressed/Makefile
View File

@ -35,8 +35,10 @@ 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) += $(obj)/uart-16550.o
obj-$(CONFIG_MACH_ALCHEMY) += $(obj)/uart-alchemy.o
endif
OBJCOPYFLAGS_vmlinux.bin := $(OBJCOPYFLAGS) -O binary -R .comment -S
$(obj)/vmlinux.bin: $(KBUILD_IMAGE)