Re: port-macppc/56089: ofwboot fails to load G5 kernel

[Martin Husemann <martin%duskware.de@localhost>]

The following reply was made to PR port-macppc/56089; it has been noted by GNATS.

From: Martin Husemann <martin%duskware.de@localhost>
To: gnats-bugs%NetBSD.org@localhost
Cc: macallan%NetBSD.org@localhost
Subject: Re: port-macppc/56089: ofwboot fails to load G5 kernel
Date: Wed, 23 Feb 2022 17:21:59 +0100

 So the first call to the new OFW_claimphys fails.
 I added some debug output:
 
 !!! CLAIM PHYS 0x100000 RETURNED 0x20 - ofw_address_cells 2 ofw_memory_ihandle 4290234752 res 20 / e12d58
 !!! FAILED TO CLAIM PHYS 0x100000 size 0x4f9000
 
 
 and verified the cell numbers:
 
 #address-cells          00000002 
 #size-cells             00000001 
 
 and the memory nodes:
 
 memory                  ffb7c980 
 mmu                     ffb7ca00 
 
 
 I don't understand the verification that method does and how it tries to
 fit two 32bit cells (that OF should have returned) into a single 32bit
 paddr_t.
 
 Why do we need to force a physical address here anyway? The old (working)
 ofwboot code did not do that and the commit log mentions nothing about
 this change.
 
 Martin