[ECOS] Newbie - Accessing MMU & SA11xx BUG ?

["Jeremias, Thilo (RSA, Brisbane)" <tjeremias at rsasecurity dot com dot au>]

Hi!
While porting the ecos package to my SA1100 board, I figured out, that there

might be a problem in the way of Virt <-> Physical mapping done in the HAL.
The value read out of the CP15 Interface is (to my knowledge) alway the 
physical address, and (in my case) that was in a remapped area.
The proper way of accessing would be to 
a) either turn off the MMU and access the page tables, or (easier)
b) to run Phys_to_virt on the page table address.

Am I right, or is that already fixed on some platforms ?

Another Q:
 Is there somewhere a docu that tells me in easy steps who to
extract my modifications from the base-distribution and to create
the tar-ball to be used as a package ?


Thilo

-----Original Message-----
From: diem.b.dang@delphiauto.com [mailto:diem.b.dang@delphiauto.com]
Sent: Friday, 29 June 2001 8:36
To: ecos-discuss@sources.redhat.com
Subject: Re: [ECOS] Newbie - Interrupt Issues



Hello;
     I'm new to eCos, the questions from our group make me think that the
disable of all interrupt will ignore all interrupt at that point on untill
enable is assert. I post this anyway because I think there maybe some new
interrupt of eCos that I don't know.

     1) We want to disable all the interrupt for a certain section of code
but
we don't want to lose any interrupt occur during that time(especially the
real
time clock interrupt).
     When we use cyg_interrupt_disable(void), is it going to destroy all the
interrupt or is it going to inhibit them (interrupt pending until all
interrupt
is re-enabled with cyg_interrupt_enable(void))?

     2) If cyg_interrupt_disable() will destroy all the interrupt occur
during
the disabling time, is there any other function or method we can use to
disable
all the interrupt but not losing any interrupt occur during the disabling
time?

TIA,
DBD