[U-Boot] [PATCH v2 03/10] x86: Allow excluding reset vector code from u-boot

[Wolfgang Denk]

Dear Simon Glass,

In message <1349910781-32088-4-git-send-email-sjg at chromium.org> you wrote:
> From: Gabe Black <gabeblack at chromium.org>
> 
> When running from coreboot we don't want this code.
> 
> This version works by ifdef-ing out all of the code that would go
> into those sections and all the code that refers to it. The sections are
> then empty, and the linker will either leave them empty for the loader
> to ignore or remove them entirely.
> 
> Signed-off-by: Gabe Black <gabeblack at chromium.org>
> Signed-off-by: Simon Glass <sjg at chromium.org>
> ---
> Changes in v2:
> - Put CONFIG_NO_RESET_CODE into Makefile instead of source files

What exactly is CONFIG_NO_RESET_CODE ?

There is no documentation anywhere for such a config option as is
mandatory when introducing it, nor is there any comment why it would
be needed, nor are there any users for it.


>  Makefile                |    7 +++++--
>  arch/x86/cpu/Makefile   |    5 ++++-
>  arch/x86/cpu/u-boot.lds |    3 +++
>  3 files changed, 12 insertions(+), 3 deletions(-)
> 
> diff --git a/Makefile b/Makefile
> index 34d9075..6c2f357 100644
> --- a/Makefile
> +++ b/Makefile
> @@ -212,9 +212,12 @@ endif
>  # U-Boot objects....order is important (i.e. start must be first)
>  
>  OBJS  = $(CPUDIR)/start.o
> +OBJS  = $(CPUDIR)/start.o
>  ifeq ($(CPU),x86)
> -OBJS += $(CPUDIR)/start16.o
> -OBJS += $(CPUDIR)/resetvec.o
> +	ifneq ($(CONFIG_NO_RESET_CODE),y)
> +		OBJS += $(CPUDIR)/start16.o
> +		OBJS += $(CPUDIR)/resetvec.o
> +	endif

NAK. Bad indentation, and please do without 'if's or the like.

> --- a/arch/x86/cpu/Makefile
> +++ b/arch/x86/cpu/Makefile
> @@ -28,7 +28,10 @@ include $(TOPDIR)/config.mk
>  
>  LIB	= $(obj)lib$(CPU).o
>  
> -START	= start.o start16.o resetvec.o
> +START	= start.o
> +ifneq ($(CONFIG_NO_RESET_CODE),y)
> +START	+= resetvec.o start16.o
> +endif

Ditto.

> --- a/arch/x86/cpu/u-boot.lds
> +++ b/arch/x86/cpu/u-boot.lds
> @@ -85,6 +85,8 @@ SECTIONS
>  	__bios_start = LOADADDR(.bios);
>  	__bios_size = SIZEOF(.bios);
>  
> +#ifndef CONFIG_NO_RESET_CODE

Undocumented.


Best regards,

Wolfgang Denk

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