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From: Joel Soete <soete.joel@tiscali.be>
To: parisc-linux@parisc-linux.org
Subject: [parisc-linux] flush_tlb_all_local:
Date: Sun, 12 Oct 2003 16:07:50 +0000	[thread overview]
Message-ID: <3F897C56.800@tiscali.be> (raw)

Hi all,

into parisc/kernel/pacache.S, i find this:
[...]
flush_tlb_all_local:
[...]
         rsm     PSW_SM_Q,%r0       /* Turn off Q bit to load iia queue */
         ldil    L%REAL_MODE_PSW, %r1
         ldo     R%REAL_MODE_PSW(%r1), %r1
         mtctl   %r1, %cr22
         mtctl   %r0, %cr17
         mtctl   %r0, %cr17
[...]

Why twice 'mtctl   %r0, %cr17'?

and also:
[...]
fitmanymiddle:                                  /* Loop if LOOP >= 2 */
         ADDIB>          -1,%r31,fitmanymiddle   /* Adjusted inner loop 
decr */
         pitlbe          0(%sr1,%r28)
         pitlbe,m        %arg1(%sr1,%r28)        /* Last pitlbe and addr 
adjust */

Typicaly the function name is flush_..., so why do we 'purge' here?

Thanks in advance for help,
	Joel

             reply	other threads:[~2003-10-12 16:07 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2003-10-12 16:07 Joel Soete [this message]
2003-10-13  3:12 ` [parisc-linux] flush_tlb_all_local: Grant Grundler
2003-10-13  4:14   ` Grant Grundler
2003-10-13 18:57     ` John David Anglin
2003-10-13 19:44       ` Matthew Wilcox

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