tree 0caed72319b7e270b26d82c4a61ae26628b33254
parent d1a8e2a6da5bea09452495748891a4ea9e42035e
author Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com> 1225117549 +0100
committer Ralf Baechle <ralf@linux-mips.org> 1225124311 +0000

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>