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/*
* Miscellaneous low-level MMU functions.
*
* Copyright (C) 2008-2009 Michal Simek <monstr@monstr.eu>
* Copyright (C) 2008-2009 PetaLogix
* Copyright (C) 2007 Xilinx, Inc. All rights reserved.
*
* Derived from arch/ppc/kernel/misc.S
*
* This file is subject to the terms and conditions of the GNU General
* Public License. See the file COPYING in the main directory of this
* archive for more details.
*/
#include <linux/linkage.h>
#include <linux/sys.h>
#include <asm/unistd.h>
#include <linux/errno.h>
#include <asm/mmu.h>
#include <asm/page.h>
.text
/*
* Flush MMU TLB
*
* We avoid flushing the pinned 0, 1 and possibly 2 entries.
*/
.globl _tlbia;
.type _tlbia, @function
.align 4;
_tlbia:
lwi r12, r0, tlb_skip;
/* isync */
_tlbia_1:
mts rtlbx, r12
nop
mts rtlbhi, r0 /* flush: ensure V is clear */
nop
rsubi r11, r12, MICROBLAZE_TLB_SIZE - 1
bneid r11, _tlbia_1 /* loop for all entries */
addik r12, r12, 1
/* sync */
rtsd r15, 8
nop
.size _tlbia, . - _tlbia
/*
* Flush MMU TLB for a particular address (in r5)
*/
.globl _tlbie;
.type _tlbie, @function
.align 4;
_tlbie:
mts rtlbsx, r5 /* look up the address in TLB */
nop
mfs r12, rtlbx /* Retrieve index */
nop
blti r12, _tlbie_1 /* Check if found */
mts rtlbhi, r0 /* flush: ensure V is clear */
nop
_tlbie_1:
rtsd r15, 8
nop
.size _tlbie, . - _tlbie
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