From: Paul Mackerras <paulus@samba.org>
To: Andrew Liu <shengping.liu@windriver.com>
Cc: linuxppc-dev@ozlabs.org
Subject: Re: [PATCH] [POWERPC] Uniformly use memstart_addr variable as the start address of physical memory in powerpc branch
Date: Wed, 21 May 2008 14:14:09 +1000 [thread overview]
Message-ID: <18483.41361.745089.794208@cargo.ozlabs.ibm.com> (raw)
In-Reply-To: <4833875A.9090006@windriver.com>
Andrew Liu writes:
> You know we can't make sure in future the start address of all incoming
> boards' RAM is 0, especially, in AMP system, different cpu uses the different RAM area,
> definitely, the start address of some is not 0.
Any processor that uses ppc_mmu_32.c will have interrupt vectors in
the 0 - 0x3000 region of memory and hence *must* have RAM starting at
zero. In other words, that file is only used for "classic" 32-bit
PowerPC processors, not for anything based on Book E or Power
architecture v2.04 or later.
Paul.
prev parent reply other threads:[~2008-05-21 4:14 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-05-21 1:38 [PATCH] [POWERPC] Uniformly use memstart_addr variable as the start address of physical memory in powerpc branch Andrew Liu
2008-05-21 3:11 ` Kumar Gala
2008-05-21 2:22 ` Andrew Liu
2008-05-21 4:14 ` Paul Mackerras [this message]
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