From: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com>
Date: Mon, 27 Oct 2008 14:25:49 +0000 (+0100)
Subject: MIPS: TXx9: Make firmware parameter passing more robust
X-Git-Tag: v2.6.28-rc3~95^2~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=97b0511ce125b0cb95d73b198c1bdbb3cebc4de2;p=pandora-kernel.git

MIPS: TXx9: Make firmware parameter passing more robust

When booting Linux on a txx9 board with VxWorks boot loader, it crashes in
prom_getenv(), as VxWorks doesn't pass firmware parameters in a0-a3 (in my
case, the actual leftover values in these registers were 0x80002000,
0x80001fe0, 0x2000, and 0x20).

Make the parsing of argc, argv, and envp a bit more robust by checking if
argc is a number below CKSEG0, and argv/envp point to CKSEG0.

Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com>
Acked-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
---

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