Re: [ECOS] EDB/EP7212 internal SRAM - only 4K of 37.5K seems usa

[Gary Thomas <gthomas at redhat dot com>]

On 17-Aug-2000 AshCan@aol.com wrote:
> I download the new stubs you sent to flash ROM today, but I am still 
> wondering if the patch changes I made were even compiled.  
> 
> I purposely added errored code and the errors were not detected by the make.  
> 
> 1) I errored the CS7111 and non CS7111 case of SRAM_END with no errors.  
> 
> 2) I errored the PLATFORM_SETUP1 macro and got no errors.  So I am still 
> worried these changes have not taken effect.
> 
> Is it because this code is part of the stub you sent me?
> 

If you are building RAM applications then none of this applies.  Look
carefully at the macro definitions and you'll see:
  // Define startup code [macros]
#if defined(CYGSEM_HAL_INSTALL_MMU_TABLES) && !defined(CYG_HAL_STARTUP_RAM)

In this case, the macros are left empty.

NB: this is because the way the memory is mapped (not 1-1) makes it very
difficult to reprogram the MMU on the fly and thus this operation is only
performed by ROM startup code.

> In a message dated 8/17/00 3:57:00 AM Pacific Daylight Time, 
> gthomas@redhat.com writes:
> 
>> 
>>  On 16-Aug-2000 AshCan@aol.com wrote:
>>  > I have been able to add the parse changes into my hal_platform_setup.h, 
>> but the changes, in macro
>>  > PLATFORM_SETUP1, are not being compiled possibly because my 
> configuration 
>> does not have
>>  > CYGSEM_HAL_STATIC_MMU_TABLES enabled, only mmu tables placed in DRAM.
>>  > 
>>  > To make on update of my build I do:
>>  > 
>>  > ecosconfig target edb7xxx
>>  > ecosconfig tree
>>  > make clean
>>  > rm install/lib/target.ld
>>  > rm install/lib/vectors.o
>>  > rm install/lib/extras.o
>>  > make
>>  > 
>>  > What am I missing?
>>  > 
>>  
>>  Indeed, these changes will only take affect if you install new stubs.
>>  Sorry I didn't think about that yesterday.
>>  
>>  If you want, I can send you [privately] new stubs to install on your
>>  board that will fix the SRAM mapping problem.
>>  
>>  
>