[parisc-linux] some questions

[parisc-linux] some questions

[M. Grabert]

Hi there,
some questions for you ...

- what will be the minimum memory requirements for
linux/HPPA on a 735/99 ? (with and w/o X)

- IMHO there is no usable free X server for linux/HPPA,
(for my 735) but i think a have working binary of XFree for 
hpux10.10 laying around here. If this is true, and the source
code is available, is this going to be difficult to port it to
linux/HPPA ? (perhaps i'll try it out, some time in future)

- AFAIK is the (first) main target the HP9000/7xx series.
I have also a HP9000/800/F10 (8MB) laying around here,
which i don't need anymore, so if you want it ...
.. there is just the problem of transport

- what filesystems are supported ?
is only nfs supported yet ?


greetings max


PS:
i'm a (poor ;) student of computer science in ratisbon,
germany, a i just have 16MB for my 735. Addidional 64MB would
cost about 350$ i think. Some sponsors *grin* ?
Or some ideas where i can get some memory real cheap ?

PPS: great work you're doing!

Re: [parisc-linux] some questions

[willy]

On Sun, Mar 26, 2000 at 11:44:59PM +0200, M. Grabert wrote:
> Hi there,
> some questions for you ...
> 
> - what will be the minimum memory requirements for
> linux/HPPA on a 735/99 ? (with and w/o X)

difficult to say.  8MB without X and 16MB with X, at a guess.

> - IMHO there is no usable free X server for linux/HPPA,
> (for my 735) but i think a have working binary of XFree for 
> hpux10.10 laying around here. If this is true, and the source
> code is available, is this going to be difficult to port it to
> linux/HPPA ? (perhaps i'll try it out, some time in future)

cool, I didn't know XFree had been ported to hpux 10.10.  In fact,
I can't see any mention of it on the XFree site, so this intrigues me
quite a lot.

> - AFAIK is the (first) main target the HP9000/7xx series.
> I have also a HP9000/800/F10 (8MB) laying around here,
> which i don't need anymore, so if you want it ...
> .. there is just the problem of transport

There's quite a few people seem to want support for their Nova servers.
They're not _as_ interesting as some of the other machines we have,
and will be quite a lot of work to support.  There's no documentation
currently released on any of the peripherals.

> - what filesystems are supported ?

we currently use ext2 out of a ramdisk and nfs.  other filesystems should
work, including the UFS variant which is in use on some HP drives.  the
problem is that we don't have any scsi adapters supported yet.

> PS:
> i'm a (poor ;) student of computer science in ratisbon,
> germany, a i just have 16MB for my 735. Addidional 64MB would
> cost about 350$ i think. Some sponsors *grin* ?
> Or some ideas where i can get some memory real cheap ?

oh, I have some ideas... :-)  BTW, where's Ratisbon?  None of my german
acquaintances know where that is and mapquest has never heard of it.

> PPS: great work you're doing!
> 

Re: [parisc-linux] some questions

[Steven Pritchard]

willy@thepuffingroup.com said:
> cool, I didn't know XFree had been ported to hpux 10.10.  In fact,
> I can't see any mention of it on the XFree site, so this intrigues me
> quite a lot.

X11R6.4 compiles on HP-UX (10.20, at least), right out of the box.  I
ran it on a 715 (or was that a 735?) for a while (for some reason that
I can't remember).  I seem to recall that I compiled the server from
the XFree 3.3.x sources once also.  (I really only wanted the XFree
xterm.)

Anyway, it works, but it doesn't have any of the fancy color-recovery
extensions that the "real" HP-UX X server comes with.  It probably
also won't work with anything but really old graphics hardware, but it
would be worth a try...

Steve
-- 
steve@silug.org           | Linux Users of Central Illinois
(618)398-7320             | Meetings the 4th Tuesday of every month
Steven Pritchard          | http://www.luci.org/ for more info

[parisc-linux] Some Questions...

[Daniel Engstrom]

Hello all, 

I have some qustions regarding the EISA support and other stuff.

1) Non sharable interrupts
ISA IRQ are edge triggered and inherently un-sharable. Should 
there be a flag-field attached to the irq region struct which
reports the sharability of an irq?

2) ISR Re-entrance
I think that an IRQ manager needs to mask the IRQ while serviceing it
to avoid reentring the ISR(s). Is this done for non-EISA irq manager on 
palinux?

3) String I/O implementation
The string I/O functions (insl/outsl and friends) are implemented in 
terms of inl/outl and so on. This means that the HPA switch code in 
arch/parisc/kernel/pci.c is executed once per word in the transfer.
If the pci_hba_data struct had entries for these the test would have 
been done outside of the loop.

4) EISA EEPROM format
I have not yet fully understood the fromat of the EISA configuration 
EEPROM located on the system board. 
Could anyone fill-in with how the EISA slot configuration space should be 
decoded. I have figured out the general header and the fixed part of the 
per-slot structure.

5) EISA Memory Mapping/DMA stuff
I'd like to make something here too, any pointer to how to proceed?
What I thnk I have figured out is the following:
It seems like that from the EISA side the window is 4MB starting at 
1MB. From the host side the window seem to start at 0xfc100000 and be 
1.75MB in size.
How is the window controlled?

/Daniel

-- 

Re: [parisc-linux] Some Questions...

[Grant Grundler]

Daniel Engstrom wrote:
> 3) String I/O implementation
> The string I/O functions (insl/outsl and friends) are implemented in 
> terms of inl/outl and so on. This means that the HPA switch code in 
> arch/parisc/kernel/pci.c is executed once per word in the transfer.
> If the pci_hba_data struct had entries for these the test would have 
> been done outside of the loop.

It doesn't matter. The cost (in cycles) to perform the read
far exceeds any savings in cpu cycles getting rid of the switch
will bring. I'm talking 500 or so cycles per IO port space read
on a 400Mhz PA8500.

Of course, you could measure inb() precisely with CR16 on *your* box
(using EISA) since YMMV and I haven't done this in a while.

grant