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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
+ mbar 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
+ mbar 1 /* sync */
+_tlbie_1:
+ rtsd r15, 8
+ nop
+
+ .size _tlbie, . - _tlbie