1 /*
2 * Miscellaneous low-level MMU functions.
3 *
4 * Copyright (C) 2008-2009 Michal Simek <monstr
5 * Copyright (C) 2008-2009 PetaLogix
6 * Copyright (C) 2007 Xilinx, Inc. All rights
7 *
8 * Derived from arch/ppc/kernel/misc.S
9 *
10 * This file is subject to the terms and condi
11 * Public License. See the file COPYING in the
12 * archive for more details.
13 */
14
15 #include <linux/linkage.h>
16 #include <linux/sys.h>
17 #include <asm/unistd.h>
18 #include <linux/errno.h>
19 #include <asm/mmu.h>
20 #include <asm/page.h>
21
22 .text
23 /*
24 * Flush MMU TLB
25 *
26 * We avoid flushing the pinned 0, 1 and possi
27 */
28 .globl _tlbia;
29 .type _tlbia, @function
30 .align 4;
31 _tlbia:
32 lwi r12, r0, tlb_skip;
33 /* isync */
34 _tlbia_1:
35 mts rtlbx, r12
36 nop
37 mts rtlbhi, r0 /* flush: ensure V
38 nop
39 rsubi r11, r12, MICROBLAZE_TLB_SIZE
40 bneid r11, _tlbia_1 /* loop for all
41 addik r12, r12, 1
42 mbar 1 /* sync */
43 rtsd r15, 8
44 nop
45 .size _tlbia, . - _tlbia
46
47 /*
48 * Flush MMU TLB for a particular address (in
49 */
50 .globl _tlbie;
51 .type _tlbie, @function
52 .align 4;
53 _tlbie:
54 mts rtlbsx, r5 /* look up the addr
55 nop
56 mfs r12, rtlbx /* Retrieve index *
57 nop
58 blti r12, _tlbie_1 /* Check if foun
59 mts rtlbhi, r0 /* flush: ensure V
60 nop
61 mbar 1 /* sync */
62 _tlbie_1:
63 rtsd r15, 8
64 nop
65
66 .size _tlbie, . - _tlbie
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.