Date: Mon, 18 Dec 2006 09:04:41 -0800 From: Peter Grehan <grehan@freebsd.org> To: Andrew Turner <andrew@fubar.geek.nz> Cc: freebsd-ppc@freebsd.org Subject: Re: FreeBSD on an Efika Message-ID: <4586CA29.10803@freebsd.org> In-Reply-To: <20061218222327.308dca53@hermies.int.fubar.geek.nz> References: <20061218104841.72ba51ea@hermies.int.fubar.geek.nz> <4585CCC1.7050005@freebsd.org> <20061218222327.308dca53@hermies.int.fubar.geek.nz>
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Hi Andrew, > I'm getting correct values from mem_regions. I can read from the > physical address. What values are you getting back ? Does it look like what the system should have ? Did you read as well as write the physical value ? > It is reading from msgbufp where it stop working. What're the virtual/physical values used when creating the msgbuf mapping with pmap_kenter() in machdep.c:powerpc_init() ? After that mapping has been created, can you read/write to the buffer in that routine ? Do you end up in the trap handler if you touch msgbuf ? pmap_kenter() is fundamental to the operation of the system and probably OK, so something else must be afoot. later, Peter.
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