Commit f86a69b1 authored by Wu Zhangjin's avatar Wu Zhangjin Committed by Ralf Baechle
Browse files

MIPS: Make the debugging of compressed kernel configurable 



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: default avatarWu 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: default avatarRalf Baechle <ralf@linux-mips.org>
parent b66bb609

arch/mips/Kconfig.debug

+19 −0
Original line number Diff line number Diff line
@@ -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

arch/mips/boot/compressed/Makefile

+2 −0
Original line number Diff line number Diff line
@@ -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)

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