[ECOS]configuring heap memory

[ECOS]configuring heap memory

[Andrea Acquaviva]

Hi all,
I have two questions about heap memory. I work with a strongarm based
board with 64MB of sdram.

1 - how can I specify two heap memory sections heap1 , heap2?
2 - how can I change the starting address of heap memory? (not contigue
to the bss section)

How must I change mlt files to do that?

Thanks,
Andrea.


--
Ing. Andrea Acquaviva
D.E.I.S. - Universita' di Bologna
V.le Risorgimento, 2    40136 BOLOGNA (ITALY)
Tel: (+39) 051-2093782 Fax: (+39) 051 2093786




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Re: [ECOS]configuring heap memory

[Jonathan Larmour]

Andrea Acquaviva wrote:
> 
> Hi all,
> I have two questions about heap memory. I work with a strongarm based
> board with 64MB of sdram.
> 
> 1 - how can I specify two heap memory sections heap1 , heap2?
> 2 - how can I change the starting address of heap memory? (not contigue
> to the bss section)
> 
> How must I change mlt files to do that?

You can use the Memory Layout Tool in the version 1 configuration tool. Or
you can edit the .ldi and .h files in the include/pkgconf directory. Define
a heap2 in exactly the same way (other than the address) as heap1 was
defined. Use the definition of heap1 to guide you in how to define heap2.

Jifl
-- 
Red Hat, Rustat House, Clifton Road, Cambridge, UK. Tel: +44 (1223) 271062
--[ "You can complain because roses have thorns, or you ]--
--[  can rejoice because thorns have roses." -Lincoln   ]-- Opinions==mine

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[ECOS] pcmb_screen keyboard patch

[David N. Welton]

Don't recall if this got posted previously, or if it's maybe in the
new sources that you have, but I had this problem:

--- packages/hal/i386/pcmb/current/src/pcmb_screen.c    30 Nov 2001 13:09:27 -0000      1.3
+++ packages/hal/i386/pcmb/current/src/pcmb_screen.c    25 Apr 2002 13:26:31 -0000
@@ -285,7 +285,7 @@
 {      0xFF,           0xFF,           0xFF,           0xFF,   },
 {      0x1b,           0x1b,           0x1b,           0xFF,   },
 {      '1',            '!',            0xFF,           0xFF,   },
-{      '2',            '"',            0xFF,           0xFF,   },
+{      '2',            '@',            0xFF,           0xFF,   },
 {      '3',            '#',            0xFF,           0xFF,   },
 {      '4',            '$',            0xFF,           0xFF,   },
 {      '5',            '%',            0xFF,           0xFF,   },
@@ -324,7 +324,7 @@
 {      'k',            'K',            0x0b,           0xFF,   },
 {      'l',            'L',            0x0c,           0xFF,   },
 {      ';',            ':',            0xFF,           0xFF,   },
-{      0x27,           '@',            0xFF,           0xFF,   },
+{      0x27,           '"',            0xFF,           0xFF,   },
 {      '#',            '~',            0xFF,           0xFF,   },
 {      '`',            '~',            0xFF,           0xFF,   },
 {      '\\',           '|',            0x1C,           0xFF,   },

Thanks,
-- 
David N. Welton
   Consulting: http://www.dedasys.com/
     Personal: http://www.dedasys.com/davidw/
Free Software: http://www.dedasys.com/freesoftware/
   Apache Tcl: http://tcl.apache.org/

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Re: [ECOS]configuring heap memory

[David N. Welton]

Jonathan Larmour <jlarmour@redhat.com> writes:

> Or you can edit the .ldi and .h files in the include/pkgconf
> directory. Define a heap2 in exactly the same way (other than the
> address) as heap1 was defined. Use the definition of heap1 to guide
> you in how to define heap2.

Here's my stab at an example, at least for i386 floppy (although
presumably the others might be made to work in a similar fashion?), as
this seems to be a FAQ:

In heaps.hxx:

#define CYGMEM_HEAP_COUNT 2

Tacked on to the *end* of mlt_i386_pc_floppy.h:

#ifndef __ASSEMBLER__
extern char CYG_LABEL_NAME (__heap2) [];
#endif
#define CYGMEM_SECTION_heap2 (CYG_LABEL_NAME (__heap2))
#define CYGMEM_SECTION_heap2_SIZE (0xa00000)
                                   ^^^^^^^^ insert whatever here

The end of mlt_i386_pc_floppy.ldi:

    CYG_LABEL_DEFN(__heap1) = ALIGN (0x8);
    CYG_LABEL_DEFN(__heap2) = ALIGN (0x8);
    SECTIONS_END
}

Those seemed to do the trick for me!

-- 
David N. Welton
   Consulting: http://www.dedasys.com/
     Personal: http://www.dedasys.com/davidw/
Free Software: http://www.dedasys.com/freesoftware/
   Apache Tcl: http://tcl.apache.org/

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Re: [ECOS]configuring heap memory

[Andrea Acquaviva]

"David N. Welton" wrote:

> Jonathan Larmour <jlarmour@redhat.com> writes:
>
> > Or you can edit the .ldi and .h files in the include/pkgconf
> > directory. Define a heap2 in exactly the same way (other than the
> > address) as heap1 was defined. Use the definition of heap1 to guide
> > you in how to define heap2.
>
> Here's my stab at an example, at least for i386 floppy (although
> presumably the others might be made to work in a similar fashion?), as
> this seems to be a FAQ:
>
> In heaps.hxx:
>
> #define CYGMEM_HEAP_COUNT 2
>
> Tacked on to the *end* of mlt_i386_pc_floppy.h:
>
> #ifndef __ASSEMBLER__
> extern char CYG_LABEL_NAME (__heap2) [];
> #endif
> #define CYGMEM_SECTION_heap2 (CYG_LABEL_NAME (__heap2))
> #define CYGMEM_SECTION_heap2_SIZE (0xa00000)
>                                    ^^^^^^^^ insert whatever here
>
> The end of mlt_i386_pc_floppy.ldi:
>
>     CYG_LABEL_DEFN(__heap1) = ALIGN (0x8);
>     CYG_LABEL_DEFN(__heap2) = ALIGN (0x8);
>     SECTIONS_END
> }
>
> Those seemed to do the trick for me!
>
> --
> David N. Welton
>    Consulting: http://www.dedasys.com/
>      Personal: http://www.dedasys.com/davidw/
> Free Software: http://www.dedasys.com/freesoftware/
>    Apache Tcl: http://tcl.apache.org/
>
> --
> Before posting, please read the FAQ: http://sources.redhat.com/fom/ecos
> and search the list archive: http://sources.redhat.com/ml/ecos-discuss

Thanks David.
This way heap2 will be contiguous to heap1.
How can I specify a different start address for heap2?

Thanks for your help,
Andrea.

--
Ing. Andrea Acquaviva
D.E.I.S. - Universita' di Bologna
V.le Risorgimento, 2    40136 BOLOGNA (ITALY)
Tel: (+39) 051-2093782 Fax: (+39) 051 2093786




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Re: [ECOS]configuring heap memory

[David N. Welton]

Andrea Acquaviva <aacquaviva@deis.unibo.it> writes:

> Thanks David.  This way heap2 will be contiguous to heap1.  How can
> I specify a different start address for heap2?

Boh!  I don't know, unfortunately.  I'm kind of surprised I actually
got the code I posted working.

-- 
David N. Welton
   Consulting: http://www.dedasys.com/
     Personal: http://www.dedasys.com/davidw/
Free Software: http://www.dedasys.com/freesoftware/
   Apache Tcl: http://tcl.apache.org/

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Re: [ECOS] pcmb_screen keyboard patch

[Gary Thomas]

Ah, the differences (some of them) between a British and an American
keyboard :-)  Perhaps we need a configuration option for this.

On Tue, 2002-05-21 at 06:38, David N. Welton wrote:
> 
> Don't recall if this got posted previously, or if it's maybe in the
> new sources that you have, but I had this problem:
> 
> --- packages/hal/i386/pcmb/current/src/pcmb_screen.c    30 Nov 2001 13:09:27 -0000      1.3
> +++ packages/hal/i386/pcmb/current/src/pcmb_screen.c    25 Apr 2002 13:26:31 -0000
> @@ -285,7 +285,7 @@
>  {      0xFF,           0xFF,           0xFF,           0xFF,   },
>  {      0x1b,           0x1b,           0x1b,           0xFF,   },
>  {      '1',            '!',            0xFF,           0xFF,   },
> -{      '2',            '"',            0xFF,           0xFF,   },
> +{      '2',            '@',            0xFF,           0xFF,   },
>  {      '3',            '#',            0xFF,           0xFF,   },
>  {      '4',            '$',            0xFF,           0xFF,   },
>  {      '5',            '%',            0xFF,           0xFF,   },
> @@ -324,7 +324,7 @@
>  {      'k',            'K',            0x0b,           0xFF,   },
>  {      'l',            'L',            0x0c,           0xFF,   },
>  {      ';',            ':',            0xFF,           0xFF,   },
> -{      0x27,           '@',            0xFF,           0xFF,   },
> +{      0x27,           '"',            0xFF,           0xFF,   },
>  {      '#',            '~',            0xFF,           0xFF,   },
>  {      '`',            '~',            0xFF,           0xFF,   },
>  {      '\\',           '|',            0x1C,           0xFF,   },
> 
> Thanks,
> -- 
> David N. Welton
>    Consulting: http://www.dedasys.com/
>      Personal: http://www.dedasys.com/davidw/
> Free Software: http://www.dedasys.com/freesoftware/
>    Apache Tcl: http://tcl.apache.org/



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[ECOS] interrupts - deleting/finding by vector

[David N. Welton]

I want to write some code that might want to insert its own interrupts
(I'm not positive, but I'm still experimenting).

Is there a way to 

1) find out if a given vector has a had an interrupt created for it?

2) if so, delete/replace it?

I didn't see anything like this in the API...

-- 
David N. Welton
   Consulting: http://www.dedasys.com/
     Personal: http://www.dedasys.com/davidw/
Free Software: http://www.dedasys.com/freesoftware/
   Apache Tcl: http://tcl.apache.org/

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Re: [ECOS] pcmb_screen keyboard patch

[David N. Welton]

Gary Thomas <gthomas@redhat.com> writes:

> Ah, the differences (some of them) between a British and an American
> keyboard :-)

I suspected as much.

> Perhaps we need a configuration option for this.

Yes, especially considering that in the future, it might be of
interest to plug in different keyboard types - Italian, French,
German, etc...

Thanks,
-- 
David N. Welton
   Consulting: http://www.dedasys.com/
     Personal: http://www.dedasys.com/davidw/
Free Software: http://www.dedasys.com/freesoftware/
   Apache Tcl: http://tcl.apache.org/

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Re: [ECOS]configuring heap memory

[Jonathan Larmour]

Andrea Acquaviva wrote:
> > The end of mlt_i386_pc_floppy.ldi:
> >
> >     CYG_LABEL_DEFN(__heap1) = ALIGN (0x8);
> >     CYG_LABEL_DEFN(__heap2) = ALIGN (0x8);
> >     SECTIONS_END
> > }
> >
> > Those seemed to do the trick for me!
> Thanks David.
> This way heap2 will be contiguous to heap1.
> How can I specify a different start address for heap2?

Simply specify the address in the appropriate line in the .ldi file, e.g.:

CYG_LABEL_DEFN(__heap2) = 0x100000;

or you can use expressions - see the GNU ld manual on linker scripts for
details of what's permitted.

Jifl
-- 
Red Hat, Rustat House, Clifton Road, Cambridge, UK. Tel: +44 (1223) 271062
--[ "You can complain because roses have thorns, or you ]--
--[  can rejoice because thorns have roses." -Lincoln   ]-- Opinions==mine

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Re: [ECOS] interrupts - deleting/finding by vector

[Jonathan Larmour]

"David N. Welton" wrote:
> 
> I want to write some code that might want to insert its own interrupts
> (I'm not positive, but I'm still experimenting).
> 
> Is there a way to
> 
> 1) find out if a given vector has a had an interrupt created for it?
> 
> 2) if so, delete/replace it?
> 
> I didn't see anything like this in the API...

It's not part of the "official" API as such, but each HAL has a macro
called HAL_INTERRUPT_IN_USE you can use to determine if an interrupt vector
has something already installed on it. Deleting/replacing it can then be
done using the standard functions. Look at that in the hal_intr.h file in
the arch source directory of the appropriate HAL.

Jifl
-- 
Red Hat, Rustat House, Clifton Road, Cambridge, UK. Tel: +44 (1223) 271062
--[ "You can complain because roses have thorns, or you ]--
--[  can rejoice because thorns have roses." -Lincoln   ]-- Opinions==mine

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"scriptics.com" -> "tcl.tk"

[David N. Welton]

find . -type f | xargs fgrep scriptics.com |less

turns up a few references to scriptics.  These are out of date, as
'www.tcl.tk' is the canonical name for the Tcl/Tk site.

Thanks,
-- 
David N. Welton
   Consulting: http://www.dedasys.com/
     Personal: http://www.dedasys.com/davidw/
Free Software: http://www.dedasys.com/freesoftware/
   Apache Tcl: http://tcl.apache.org/

[ECOS] ecos web site front page

[David N. Welton]

If I may make a few suggestions:

Looking through the FAQ, you have this very nice blurb in it:

        eCos (embedded Configurable operating system) is an
        open-source, royalty-free, highly configurable,
        application-specific operating system ideal for embedded
        systems development. eCos is targeted at high-volume
        applications in consumer electronics, telecommunications,
        automotive, and other deeply embedded applications. eCos
        ensures embedded developers have a common software
        infrastructure for delivering a diverse range of embedded
        products and enables embedded software developers to focus on
        delivering better products, instead of developing or
        maintaining a real-time operating system in addition to the
        products themselves.

I think you guys ought to put that on the front page, at the top.
Putting either the 'news' or 'about eCos' sections on a seperate page
would make the front page a little less cluttered.  You have to page
through lots of old news to even notice the 'about ecos' material at
the bottom.

Just a few thoughts...
-- 
David N. Welton
   Consulting: http://www.dedasys.com/
     Personal: http://www.dedasys.com/davidw/
Free Software: http://www.dedasys.com/freesoftware/
   Apache Tcl: http://tcl.apache.org/

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