[ECOS] Intel P30 FLASH Help

[ECOS] Intel P30 FLASH Help

[Benny Chen]

Hi Guys,
I am running Redboot on an Cirrus ARM9 board which used to use the Intel 
J3 flash.  I am in the mids of getting it to work on a Intel P30 flash.  

I have managed to change the download utility used by Cirrus to include 
attributes unique to the P30 flash
  - Asymmetric Block size
The download seems to work find and had completed successfully.

However, when my program executes using ROMRAM startup it stops at the 
cyg_hal_start_constructors() routine in vectors.S.  It seems that the 
only diag_printf statement that prints is the one before the for loop as 
per delow.

Is this due to my download utility not downloading the redboot.bin image 
properly?

One other thing is the P30 FLASH did state that XIP programs need to 
have their .text and .data sections separated into different Programming 
Region (8Mbit blocks) , as in the .data and .text section cannot both be 
in the same 8Mbit block.

I have not done this at the moment, because I am not sure how to and do 
I need it. 

When booting the Redboot via ROMRAM does that execute the startup code 
in FLASH or does it copy it to memory before it executes?

Any help is much appreciated.

Cheers,
Benny

void
cyg_hal_invoke_constructors (void)
{
#ifdef CYGSEM_HAL_STOP_CONSTRUCTORS_ON_FLAG
    static pfunc *p = &__CTOR_END__[-1];

    cyg_hal_stop_constructors = 0;
    for (; p >= __CTOR_LIST__; p--) {
        (*p) ();
        if (cyg_hal_stop_constructors) {
            p--;
            break;
        }
    }
#else
    pfunc *p;
    *diag_printf("This print OK\n");*
    for (p = &__CTOR_END__[-1]; p >= __CTOR_LIST__; p--) {
        diag_printf("This didn't print\n");
        (*p) ();
    }
#endif
}


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Re: [ECOS] Intel P30 FLASH Help

[Benny Chen]

Hi Everyone,
As it turns out this problem was due to the mapping of the address bus 
to the FLASH chip for P30.  The design was initially based on the J3 
which does a bit[23-1] mapping for the 128Mbit, but this is not required 
for the P30 FLASH.

Cheers,
Benny

Benny Chen wrote:
> Hi Guys,
> I am running Redboot on an Cirrus ARM9 board which used to use the 
> Intel J3 flash.  I am in the mids of getting it to work on a Intel P30 
> flash. 
> I have managed to change the download utility used by Cirrus to 
> include attributes unique to the P30 flash
>  - Asymmetric Block size
> The download seems to work find and had completed successfully.
>
> However, when my program executes using ROMRAM startup it stops at the 
> cyg_hal_start_constructors() routine in vectors.S.  It seems that the 
> only diag_printf statement that prints is the one before the for loop 
> as per delow.
>
> Is this due to my download utility not downloading the redboot.bin 
> image properly?
>
> One other thing is the P30 FLASH did state that XIP programs need to 
> have their .text and .data sections separated into different 
> Programming Region (8Mbit blocks) , as in the .data and .text section 
> cannot both be in the same 8Mbit block.
>
> I have not done this at the moment, because I am not sure how to and 
> do I need it.
> When booting the Redboot via ROMRAM does that execute the startup code 
> in FLASH or does it copy it to memory before it executes?
>
> Any help is much appreciated.
>
> Cheers,
> Benny
>
> void
> cyg_hal_invoke_constructors (void)
> {
> #ifdef CYGSEM_HAL_STOP_CONSTRUCTORS_ON_FLAG
>    static pfunc *p = &__CTOR_END__[-1];
>
>    cyg_hal_stop_constructors = 0;
>    for (; p >= __CTOR_LIST__; p--) {
>        (*p) ();
>        if (cyg_hal_stop_constructors) {
>            p--;
>            break;
>        }
>    }
> #else
>    pfunc *p;
>    *diag_printf("This print OK\n");*
>    for (p = &__CTOR_END__[-1]; p >= __CTOR_LIST__; p--) {
>        diag_printf("This didn't print\n");
>        (*p) ();
>    }
> #endif
> }
>
>

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RE: [ECOS] Intel P30 FLASH Help

[Joe Porthouse]

I had a similar problem. My board pin layout was for the J3, but populated
with P30 chips.  Pin assignment also is very different between the P30 and
J3, including power pins.

When I reset the processor through the Jtag, my core voltage took a dive and
the processor got very hot in about 10 seconds. :(

Next run of boards had the right J3A parts. :)

Joe Porthouse
Toptech Systems, Inc.

-----Original Message-----
From: ecos-discuss-owner@ecos.sourceware.org
[mailto:ecos-discuss-owner@ecos.sourceware.org] On Behalf Of Benny Chen
Sent: Thursday, April 06, 2006 10:17 PM
To: ecos-discuss@ecos.sourceware.org
Subject: Re: [ECOS] Intel P30 FLASH Help

Hi Everyone,
As it turns out this problem was due to the mapping of the address bus 
to the FLASH chip for P30.  The design was initially based on the J3 
which does a bit[23-1] mapping for the 128Mbit, but this is not required 
for the P30 FLASH.

Cheers,
Benny

Benny Chen wrote:
> Hi Guys,
> I am running Redboot on an Cirrus ARM9 board which used to use the 
> Intel J3 flash.  I am in the mids of getting it to work on a Intel P30 
> flash. 
> I have managed to change the download utility used by Cirrus to 
> include attributes unique to the P30 flash
>  - Asymmetric Block size
> The download seems to work find and had completed successfully.
>
> However, when my program executes using ROMRAM startup it stops at the 
> cyg_hal_start_constructors() routine in vectors.S.  It seems that the 
> only diag_printf statement that prints is the one before the for loop 
> as per delow.
>
> Is this due to my download utility not downloading the redboot.bin 
> image properly?
>
> One other thing is the P30 FLASH did state that XIP programs need to 
> have their .text and .data sections separated into different 
> Programming Region (8Mbit blocks) , as in the .data and .text section 
> cannot both be in the same 8Mbit block.
>
> I have not done this at the moment, because I am not sure how to and 
> do I need it.
> When booting the Redboot via ROMRAM does that execute the startup code 
> in FLASH or does it copy it to memory before it executes?
>
> Any help is much appreciated.
>
> Cheers,
> Benny
>
> void
> cyg_hal_invoke_constructors (void)
> {
> #ifdef CYGSEM_HAL_STOP_CONSTRUCTORS_ON_FLAG
>    static pfunc *p = &__CTOR_END__[-1];
>
>    cyg_hal_stop_constructors = 0;
>    for (; p >= __CTOR_LIST__; p--) {
>        (*p) ();
>        if (cyg_hal_stop_constructors) {
>            p--;
>            break;
>        }
>    }
> #else
>    pfunc *p;
>    *diag_printf("This print OK\n");*
>    for (p = &__CTOR_END__[-1]; p >= __CTOR_LIST__; p--) {
>        diag_printf("This didn't print\n");
>        (*p) ();
>    }
> #endif
> }
>
>

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