[OpenBIOS] Possible MMU translation bug?

[Stefan Reinauer]

On 4/16/10 12:24 PM, Mark Cave-Ayland wrote:
> call-method SUNW,retain: exception -21 
I've never seen this in any standard so far, but Linux seems to know
about it, too:

/* Set aside physical memory which is not touched or modified
* across soft resets.
*/
unsigned long prom_retain(const char *name,
unsigned long pa_low, unsigned long pa_high,
long size, long align)
{
/* XXX I don't think we return multiple values correctly.
* XXX OBP supposedly returns pa_low/pa_high here, how does
* XXX it work?
*/

/* If align is zero, the pa_low/pa_high args are passed,
* else they are not.
*/
if (align == 0)
return p1275_cmd("SUNW,retain",
(P1275_ARG(0, P1275_ARG_IN_BUF) | P1275_INOUT(5, 2)),
name, pa_low, pa_high, size, align);
else
return p1275_cmd("SUNW,retain",
(P1275_ARG(0, P1275_ARG_IN_BUF) | P1275_INOUT(3, 2)),
name, size, align);
}


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