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Re: questions about some bits of STATUS register and exception priority.

To: machael thailer <dony.he@huawei.com>
Subject: Re: questions about some bits of STATUS register and exception priority...
From: Ralf Baechle <ralf@oss.sgi.com>
Date: Tue, 21 Aug 2001 13:14:16 +0200
Cc: linux-mips@oss.sgi.com
In-reply-to: <001901c12a2f$8626be00$8021690a@huawei.com>; from dony.he@huawei.com on Tue, Aug 21, 2001 at 06:53:34PM +0800
References: <000701c12529$e1640580$8021690a@huawei.com> <20010815103314.A11966@bacchus.dhis.org> <000b01c1295e$0f2174c0$8021690a@huawei.com> <20010820230755.A11242@dea.linux-mips.net> <001901c129e1$5aaaadc0$8021690a@huawei.com> <20010821085353.B13302@dea.linux-mips.net> <001901c12a2f$8626be00$8021690a@huawei.com>
Sender: owner-linux-mips@oss.sgi.com
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On Tue, Aug 21, 2001 at 06:53:34PM +0800, machael thailer wrote:

> > In the Linux kernel CU0 is used to indicate that we're running on the
> > kernel stack.
> 
> Yes, when CU0 is 1, we can see we are running on the kernel stack.
> But when CU0 is 0, can we say it is in User mode?

No, think of the tlb exception handlers for example.

  Ralf

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