[parisc-linux] OS_ID and include/asm-parics/pdc.h

[Hannu Martikka]

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Hi!

When reading the pdc.pdf document I noticed OS_ID field in Stable Storage
area. On page 2-65:
"The first halfword of the first OS Dependet are is used to store an
identifier caller OS_ID. OS-dependent use of Stable Stodare and
Non-Volatile Memory is qualified by OS_ID."

Then there is a list of OS_ID values "assigned by HP System Architecture
and Design Lab". 

On asm-parisc/pdc.h (from OSF) we have following:
#define OS_ID_NONE      0
#define OS_ID_HPUX      1
#define OS_ID_MPE_XL    2

On pdc.h we have more of these:
0x0003 	OSF dependent data
0x0004	HP-RT dependent data
0x0005	Novell Netware dependent data

I think we might require our own OS_ID (at least in futre) if we are
going to use that non-volatile memory for something. So maybe something
like this could be registered with HP (or is it already done?):

0x0006	Linux dependent data

There is also SW_CAP field (page 2-33 on pdc.pdf) which defines "the
operating system capabilities of the processor module". This array defines
only Novell, HP-RT, OSF, MPE and HP-UX fields (and couple of R(Reserved?) 
fields). Another guestion is that do we need this for anything?

- Goodi
"The linuX Files -- The Source is Out There."
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