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Date: Sun, 26 Jul 2009 23:34:42 +0800
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Subject: Question about head_fsl_booke.S
From: "wilbur.chan" <wilbur512@gmail.com>
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Cc: chelly wilbur <wilbur512@gmail.com>
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e500  , in  head_fsl_booke.S

We know,the first two steps are:

1) invalidate all entries except  the entry we are in

2) setup a temp mapping and jump to it  respectively:



         tlbwe

         bl  1f
     1:  mflr r9
         rlwimi  r7,r9,0,20,31
         addi r7, r7,24
         mtspr   SPRN_SRR0,r7
         mtspr   SPRN_SRR1,r6
         rfi
        /*  jump to 0-4k .
         question1:   Why not this 'rfi' did not caused jumping  into
4k-8k , or 10k-14k ,    etc ?     */

         li r6,0



question2:  We know that, it is not allowed  the two entrys having the
same EPN value,so, when setting up a temp entry which ranged from
0-4k, is it possible that , this
range(0-4k)  may conflit with the entry we are executed in now?


Thx in advance.


regards,