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Re: Big Endian au1550

To: Prashant Viswanathan <vprashant@echelon.com>
Subject: Re: Big Endian au1550
From: Manish Lachwani <mlachwani@mvista.com>
Date: Wed, 27 Apr 2005 19:23:13 -0700
Cc: linux-mips@linux-mips.org
In-reply-to: <5375D9FB1CC3994D9DCBC47C344EEB590165465A@miles.echelon.echcorp.com>
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References: <5375D9FB1CC3994D9DCBC47C344EEB590165465A@miles.echelon.echcorp.com>
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Prashant Viswanathan wrote:

Is there a reason why the default configuration file doesn't support Big
Endian for the dbAu1550?
Even if I edit .config to set the endianness to "BIG" it seems to change to
"Little Endian" every time a make is run.

Thanks
Prashant


In arch/mips/Kconfig,

config CPU_LITTLE_ENDIAN
       bool "Generate little endian code"
default y if ACER_PICA_61 || CASIO_E55 || DDB5074 || DDB5476 || DDB5477 || MACH_DECSTATION || IBM_WORKPAD || LASAT || MIPS_COBALT || MIPS_ITE8172 || MIPS_IVR || SOC_AU1X00 || NEC_OSPREY || OLIVETTI_M700 || SNI_RM200_PCI || VICTOR_MPC30X || ZAO_CAPCELLA default n if MIPS_EV64120 || MIPS_EV96100 || MOMENCO_OCELOT || MOMENCO_OCELOT_G || SGI_IP22 || SGI_IP27 || SGI_IP32 || TOSHIBA_JMR3927
       help
Some MIPS machines can be configured for either little or big endian
         byte order. These modes require different kernels. Say Y if your
         machine is little endian, N if it's a big endian machine.

So, it appears that if you have SOC_AU1X00 set, it will always be configured little endian.

Thanks
Manish Lachwani



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