[U-Boot] [PATCH 01/2] powerpc/mpc85xx:Avoid fix address of bootpg section

[Prabhakar Kushwaha]

Dear Wolfgang,

With this patch I removed hard-coding(0x80000) present in 
arch/powerpc/cpu/mpc85xx/u-boot-nand.lds with CONFIG_SYS_MONITOR_LEN.
I also updated Freescale boards with correct CONFIG_SYS_MONITOR_LEN in 
subsequent patch.

There is a possibility of other powerpc boards to have incorrect 
CONFIG_SYS_MONITOR_LEN.
As I am not aware of actual size of the binary. May I update 
CONFIG_SYS_MONITOR_LEN for all powerpc platforms as 0x80000 or leave it 
up to the platform user to update with correct binary size.  I will 
check the build of these updated boards.

Thanks,
Prabhakar


On 4/3/2014 9:32 AM, Prabhakar Kushwaha wrote:
> Hi All,
>
> I just want to share my concern with respect to this patch.
> This patch removed hard-coded value for 0x80000 and use 
> CONFIG_SYS_MONITOR_LEN.
>
> There were many Freescale boards config which don't have correct 
> CONFIG_SYS_MONITOR_LEN(due to size increase from 512KB to 768KB). I 
> fixed them in subsequent patch.
>
> This linker file is being used by many other powerpc boards/platforms. 
> Because of hard-coded value of 0x80000 in linker file, there boards 
> are booting till now.
> but after this patch,  there is a possibility there boards may not 
> boot because of wrong value defined for CONFIG_SYS_MONITOR_LEN by 
> board maintainers.
>
> I will request powerpc board maintainers to check config file for 
> correct value of CONFIG_SYS_MONITOR_LEN.
>
> Regards,
> Prabhakar
>
> On 3/31/2014 3:31 PM, Prabhakar Kushwaha wrote:
>> It is not necessary for bootpg to be present at text + 512KB.
>> With increase of u-boot size (768KB), bootpg section's address
>> cannot be fixed.
>>
>> Signed-off-by: Prabhakar Kushwaha <prabhakar at freescale.com>
>> ---
>>   arch/powerpc/cpu/mpc85xx/u-boot-nand.lds |    8 +++++++-
>>   arch/powerpc/cpu/mpc85xx/u-boot.lds      |    6 +++++-
>>   2 files changed, 12 insertions(+), 2 deletions(-)
>>
>> diff --git a/arch/powerpc/cpu/mpc85xx/u-boot-nand.lds 
>> b/arch/powerpc/cpu/mpc85xx/u-boot-nand.lds
>> index df3b0f9..d77a6dc 100644
>> --- a/arch/powerpc/cpu/mpc85xx/u-boot-nand.lds
>> +++ b/arch/powerpc/cpu/mpc85xx/u-boot-nand.lds
>> @@ -4,6 +4,12 @@
>>    * SPDX-License-Identifier:    GPL-2.0+
>>    */
>>   +#include "config.h"    /* CONFIG_BOARDDIR */
>> +
>> +#ifndef CONFIG_SYS_MONITOR_LEN
>> +#define CONFIG_SYS_MONITOR_LEN    0x80000
>> +#endif
>> +
>>   OUTPUT_ARCH(powerpc)
>>   /* Do we need any of these for elf?
>>      __DYNAMIC = 0;    */
>> @@ -76,7 +82,7 @@ SECTIONS
>>       KEEP(arch/powerpc/cpu/mpc85xx/start.o (.bootpg))
>>     } :text = 0xffff
>>   -  . = ADDR(.text) + 0x80000;
>> +  . = ADDR(.text) + CONFIG_SYS_MONITOR_LEN;
>>       __bss_start = .;
>>     .bss (NOLOAD)       :
>> diff --git a/arch/powerpc/cpu/mpc85xx/u-boot.lds 
>> b/arch/powerpc/cpu/mpc85xx/u-boot.lds
>> index 2af4c80..99473dd 100644
>> --- a/arch/powerpc/cpu/mpc85xx/u-boot.lds
>> +++ b/arch/powerpc/cpu/mpc85xx/u-boot.lds
>> @@ -12,6 +12,10 @@
>>   #define RESET_VECTOR_ADDRESS    0xfffffffc
>>   #endif
>>   +#ifndef CONFIG_SYS_MONITOR_LEN
>> +#define CONFIG_SYS_MONITOR_LEN    0x80000
>> +#endif
>> +
>>   OUTPUT_ARCH(powerpc)
>>     PHDRS
>> @@ -84,7 +88,7 @@ SECTIONS
>>     {
>>       KEEP(arch/powerpc/cpu/mpc85xx/start.o (.bootpg))
>>     } :text = 0xffff
>> -  . = ADDR(.text) + 0x80000;
>> +  . = ADDR(.text) + CONFIG_SYS_MONITOR_LEN;
>>   #else
>>     .bootpg RESET_VECTOR_ADDRESS - 0xffc :
>>     {
>
>
>
>
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