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Re: Instruction error with cache opcode

To: "John Miller" <jamiller1110@cox.net>, <linux-mips@linux-mips.org>
Subject: Re: Instruction error with cache opcode
From: "Kevin D. Kissell" <KevinK@mips.com>
Date: Sun, 14 May 2006 16:17:14 +0200
Original-recipient: rfc822;linux-mips@linux-mips.org
References: <446735C6.2080306@mountolympos.net>
Sender: linux-mips-bounce@linux-mips.org
> I am attempting to write a routine to initialize the cache for a MIPS
> 4kc core to get Linux 2.6.16.14 to compile.  I am sure someone has
> probably already done this, but I am doing it for educational reasons. 
> I am receiving the following error:
> 
> arch/mips/kernel/head.S: Assembler messages:
> arch/mips/kernel/head.S:131: Error: Instruction cache requires absolute
> expression
> 
> From the following code section:
> 
> li t0, 0x80000000  # start address (KSEG0)
> addu t1,t0,0x2000 # 8KB I-cache
> 1: addu t0,0x10 # 16B line size
> cache Index_Store_Tag_I,-4(t0) # clear tag
> nop
> cache Fill_I,-4(t0) # fill line
> nop
> bne t0,t1,1b
> cache Index_Store_Tag_I,-4(t0)
> 
>  I copied the code section from See MIPS Run, so I know the code must be
> correct.  What am I doing wrong?

Where and how is the value of Index_Store_Tag_I  defined?

            Regards,

            Kevin K.

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