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List:       netbsd-source-changes
Subject:    CVS commit: src/sys/arch/alpha/alpha
From:       "Jason R Thorpe" <thorpej () netbsd ! org>
Date:       2023-12-30 23:07:42
Message-ID: 20231230230742.D801CFA42 () cvs ! NetBSD ! org
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Module Name:	src
Committed By:	thorpej
Date:		Sat Dec 30 23:07:42 UTC 2023

Modified Files:
	src/sys/arch/alpha/alpha: pmap.c

Log Message:
pmap_bootstrap(): When initializing the L2 PTEs, don't use l2pte_index(),
as it is designed to wrap from 1023->0 during the normal course of use.
However, when setting up the initial kernel page tables, if we have a
large enough config that we end up with more than L2 PT page, we rely
on being able to index > 1023 into the adjacent PT pages to initialize
those entries.

Fixes a MM fault panic during early boot on larger memory configs
(reported by Dave McGuire with an 8GB ES40 and John Klos with a 12GB
DS25).  I've successfully booted at 16GB config in Qemu with this fix.


To generate a diff of this commit:
cvs rdiff -u -r1.307 -r1.308 src/sys/arch/alpha/alpha/pmap.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.

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