[U-Boot-Users] environment settings question

[Timur Tabi <timur@freescale.com>]

sapirf fersht wrote:
> For a ixp425 cpu how should the environment value
> #define CFG_ENV_IS_IN_FLASH be set?
> 
> #define CFG_ENV_IS_IN_FLASH
> 
> OR
> 
> #define CFG_ENV_IS_IN_FLASH 1

The code that uses these macros should support both methods, but personally I prefer that 
the macros themselves be defined using the first method.  IMHO, you should define a macro 
to contain a value only if that value has some inherent significance.  For example, does 
"1" really mean something that "2" doesn't?  In this case, no.

-- 
Timur Tabi
Linux Kernel Developer @ Freescale



From "abiyani at unix dot telasic dot com" at unix.telasic.com  Tue Jun 26 02:30:36 2007
From: "abiyani at unix dot telasic dot com" at unix.telasic.com (Arun Biyani)
Date: Mon, 25 Jun 2007 17:30:36 -0700
Subject: [U-Boot-Users] U-Boot 1.2 - Cannot run hello_world
In-Reply-To: <200706192208.PAA23857@unix.telasic.com>
References: <mailman.29221.1182256330.29999.u-boot-users@lists.sourceforge.net>	<4677E737.2070507@alum.mit.edu>
	<200706192208.PAA23857@unix.telasic.com>
Message-ID: <200706260030.RAA15449@unix.telasic.com>

Arun Biyani wrote:
> When I add CFG_CMD_ELF to the configuration, I get the error below. 
> Maybe the CFG_CMD_ELF needs
> to be coupled with some other configuration option. Please help.
>
> My current definition is -
>
> #define CONFIG_COMMANDS     (                              \
>                            CONFIG_CMD_DFL       |     \
>                CFG_CMD_ELF          |    \
>                CFG_CMD_MII          |    \
>                CFG_CMD_JFFS2        |     \
>                CFG_CMD_NET          |     \
>                CFG_CMD_DHCP         |     \
>                CFG_CMD_PING             \
>                )
>
> The error I get is - (dcache_status & dcache_disable missing):
>
> /home/local/bin/../lib/gcc/m68k-uclinux/4.1.1/m5307/msep-data -lgcc \
>                         -Map u-boot.map -o u-boot
> common/libcommon.a(cmd_elf.o): In function `do_bootelf':
> /home/abiyani/wrk/u-boot-1.2.0/common/cmd_elf.c:62: undefined reference 
> to `dcache_status'
> /home/abiyani/wrk/u-boot-1.2.0/common/cmd_elf.c:63: undefined reference 
> to `dcache_disable'
> make: *** [u-boot] Error 1
> [u-boot-1.2.0$:1046]
>   
I get this error above if I add elf file support to u-boot for Coldfire 
processor. Looks like cmd_elf.c
expects dcache_disable and dcache_status functions. Which library 
provides these symbol values?