* [ECOS] Newbie questions
@ 2002-07-17 18:34 Madhu Lakshmanan
2002-07-17 19:21 ` [ECOS] cyg_user_start limitations SASAKI@KOBELCO
` (2 more replies)
0 siblings, 3 replies; 6+ messages in thread
From: Madhu Lakshmanan @ 2002-07-17 18:34 UTC (permalink / raw)
To: ecos-discuss
Does Redboot for an x86 platform assume that chipsets
like the Northbridge, Southbridge, etc., are
initialized by a BIOS?
Can I use the current / latest Redboot sources to
create a Redboot for a generic x86 PC which _does not_
have a BIOS?
Thanks,
Madhu Lakshmanan
__________________________________________________
Do You Yahoo!?
Yahoo! Autos - Get free new car price quotes
http://autos.yahoo.com
--
Before posting, please read the FAQ: http://sources.redhat.com/fom/ecos
and search the list archive: http://sources.redhat.com/ml/ecos-discuss
^ permalink raw reply [flat|nested] 6+ messages in thread* [ECOS] cyg_user_start limitations
2002-07-17 18:34 [ECOS] Newbie questions Madhu Lakshmanan
@ 2002-07-17 19:21 ` SASAKI@KOBELCO
2002-07-18 6:47 ` Gary Thomas
2002-07-18 0:44 ` [ECOS] Newbie questions Iztok Zupet
2002-07-18 5:35 ` Jose Souto
2 siblings, 1 reply; 6+ messages in thread
From: SASAKI@KOBELCO @ 2002-07-17 19:21 UTC (permalink / raw)
To: ecos-discuss
Hello Everyone,
I'm trying to execute some initial programs in cyg_user_start().
But some functions(systemcall) are ignored.
Does anyone know if cyg_user_start() has some limitations or not?
Thank you.
---------------
Satoshi Sasaki
sasaki@info.kobelco.co.jp (Japan Kobe)
--
Before posting, please read the FAQ: http://sources.redhat.com/fom/ecos
and search the list archive: http://sources.redhat.com/ml/ecos-discuss
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [ECOS] cyg_user_start limitations
2002-07-17 19:21 ` [ECOS] cyg_user_start limitations SASAKI@KOBELCO
@ 2002-07-18 6:47 ` Gary Thomas
2002-07-22 22:09 ` SASAKI@KOBELCO
0 siblings, 1 reply; 6+ messages in thread
From: Gary Thomas @ 2002-07-18 6:47 UTC (permalink / raw)
To: SASAKI@KOBELCO; +Cc: eCos Discussion
On Wed, 2002-07-17 at 20:14, SASAKI@KOBELCO wrote:
> Hello Everyone,
>
> I'm trying to execute some initial programs in cyg_user_start().
> But some functions(systemcall) are ignored.
> Does anyone know if cyg_user_start() has some limitations or not?
There are definitely restrictions here.
cyg_user_start() runs on the startup stack - typically small
no interrupts or scheduling will happen until this function exits
What sort of things are you trying to do?
Look at the test programs for good examples of what can and should
be done within the various startup functions.
--
Before posting, please read the FAQ: http://sources.redhat.com/fom/ecos
and search the list archive: http://sources.redhat.com/ml/ecos-discuss
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [ECOS] cyg_user_start limitations
2002-07-18 6:47 ` Gary Thomas
@ 2002-07-22 22:09 ` SASAKI@KOBELCO
0 siblings, 0 replies; 6+ messages in thread
From: SASAKI@KOBELCO @ 2002-07-22 22:09 UTC (permalink / raw)
To: Gary Thomas; +Cc: eCos Discussion
At 02/07/18 07:47, Gary Thomas wrote:
>On Wed, 2002-07-17 at 20:14, SASAKI@KOBELCO wrote:
> > Hello Everyone,
> >
> > I'm trying to execute some initial programs in cyg_user_start().
> > But some functions(systemcall) are ignored.
> > Does anyone know if cyg_user_start() has some limitations or not?
>
>There are definitely restrictions here.
> cyg_user_start() runs on the startup stack - typically small
> no interrupts or scheduling will happen until this function exits
>
>What sort of things are you trying to do?
>Look at the test programs for good examples of what can and should
>be done within the various startup functions.
I tried to set Alaram, and wait interrupt from my device.
I created another thread for initializations ,then I cleared problems.
Thank you .
---------------
Satoshi Sasaki
sasaki@info.kobelco.co.jp (Kobe Japan)
--
Before posting, please read the FAQ: http://sources.redhat.com/fom/ecos
and search the list archive: http://sources.redhat.com/ml/ecos-discuss
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [ECOS] Newbie questions
2002-07-17 18:34 [ECOS] Newbie questions Madhu Lakshmanan
2002-07-17 19:21 ` [ECOS] cyg_user_start limitations SASAKI@KOBELCO
@ 2002-07-18 0:44 ` Iztok Zupet
2002-07-18 5:35 ` Jose Souto
2 siblings, 0 replies; 6+ messages in thread
From: Iztok Zupet @ 2002-07-18 0:44 UTC (permalink / raw)
To: Madhu Lakshmanan, ecos-discuss
On Thursday 18 July 2002 03:34, Madhu Lakshmanan wrote:
> Does Redboot for an x86 platform assume that chipsets
> like the Northbridge, Southbridge, etc., are
> initialized by a BIOS?
>
> Can I use the current / latest Redboot sources to
> create a Redboot for a generic x86 PC which _does not_
> have a BIOS?
>
> Thanks,
>
> Madhu Lakshmanan
>
>
>
> __________________________________________________
> Do You Yahoo!?
> Yahoo! Autos - Get free new car price quotes
> http://autos.yahoo.com
You can try RedBoot ROM target (very experimental) and burn it to Your BIOS
flash/eprom.
Regards
iz
--
Before posting, please read the FAQ: http://sources.redhat.com/fom/ecos
and search the list archive: http://sources.redhat.com/ml/ecos-discuss
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [ECOS] Newbie questions
2002-07-17 18:34 [ECOS] Newbie questions Madhu Lakshmanan
2002-07-17 19:21 ` [ECOS] cyg_user_start limitations SASAKI@KOBELCO
2002-07-18 0:44 ` [ECOS] Newbie questions Iztok Zupet
@ 2002-07-18 5:35 ` Jose Souto
2 siblings, 0 replies; 6+ messages in thread
From: Jose Souto @ 2002-07-18 5:35 UTC (permalink / raw)
To: ecos-discuss
Hi Madhu,
Your answer is yes.
You need a bios customized to your hardware that does at least CPU
registers configuration (if needed), SDRAM memory controller configuration
(and basic memory test - for sanity), Super I/O and COM1 38400-8N1
programming or any other serial port support and network interface
configuration, if you intend to use RedBoot with network support.
The last thing this bios should do is to enter protected mode and do a "FAR
JMP" to the RedBoot entry point. The sample "romboot" available does
nothing specific to your hardware but is a fair starting point. You don't
have to reinvent a bios but you need to have at least the SDRAM working,
the other things may be done in C at the beginning of RedBoot...
Jose Luiz
Madhu Lakshmanan wrote:
> Does Redboot for an x86 platform assume that chipsets
> like the Northbridge, Southbridge, etc., are
> initialized by a BIOS?
>
> Can I use the current / latest Redboot sources to
> create a Redboot for a generic x86 PC which _does not_
> have a BIOS?
>
> Thanks,
>
> Madhu Lakshmanan
>
> __________________________________________________
> Do You Yahoo!?
> Yahoo! Autos - Get free new car price quotes
> http://autos.yahoo.com
>
> --
> Before posting, please read the FAQ: http://sources.redhat.com/fom/ecos
> and search the list archive: http://sources.redhat.com/ml/ecos-discuss
--
Before posting, please read the FAQ: http://sources.redhat.com/fom/ecos
and search the list archive: http://sources.redhat.com/ml/ecos-discuss
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2002-07-23 5:09 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2002-07-17 18:34 [ECOS] Newbie questions Madhu Lakshmanan
2002-07-17 19:21 ` [ECOS] cyg_user_start limitations SASAKI@KOBELCO
2002-07-18 6:47 ` Gary Thomas
2002-07-22 22:09 ` SASAKI@KOBELCO
2002-07-18 0:44 ` [ECOS] Newbie questions Iztok Zupet
2002-07-18 5:35 ` Jose Souto
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).