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authorLinus Torvalds <torvalds@linux-foundation.org>2009-03-28 17:03:14 -0400
committerLinus Torvalds <torvalds@linux-foundation.org>2009-03-28 17:03:14 -0400
commit0fe41b8982001cd14ee2c77cd776735a5024e98b (patch)
tree83e65d595c413d55259ea14fb97748ce5efe5707 /arch/arm/mm/tlb-fa.S
parenteedf2c5296a8dfaaf9aec1a938c1d3bd73159a30 (diff)
parent9759d22c8348343b0da4e25d6150c41712686c14 (diff)
Merge branch 'devel' of master.kernel.org:/home/rmk/linux-2.6-arm
* 'devel' of master.kernel.org:/home/rmk/linux-2.6-arm: (422 commits) [ARM] 5435/1: fix compile warning in sanity_check_meminfo() [ARM] 5434/1: ARM: OMAP: Fix mailbox compile for 24xx [ARM] pxa: fix the bad assumption that PCMCIA sockets always start with 0 [ARM] pxa: fix Colibri PXA300 and PXA320 LCD backlight pins imxfb: Fix TFT mode i.MX21/27: remove ifdef CONFIG_FB_IMX imxfb: add clock support mxc: add arch_reset() function clkdev: add possibility to get a clock based on the device name i.MX1: remove fb support from mach-imx [ARM] pxa: build arch/arm/plat-pxa/mfp.c only when PXA3xx or ARCH_MMP defined Gemini: Add support for Teltonika RUT100 Gemini: gpiolib based GPIO support v2 MAINTAINERS: add myself as Gemini architecture maintainer ARM: Add Gemini architecture v3 [ARM] OMAP: Fix compile for omap2_init_common_hw() MAINTAINERS: Add myself as Faraday ARM core variant maintainer ARM: Add support for FA526 v2 [ARM] acorn,ebsa110,footbridge,integrator,sa1100: Convert asm/io.h to linux/io.h [ARM] collie: fix two minor formatting nits ...
Diffstat (limited to 'arch/arm/mm/tlb-fa.S')
-rw-r--r--arch/arm/mm/tlb-fa.S75
1 files changed, 75 insertions, 0 deletions
diff --git a/arch/arm/mm/tlb-fa.S b/arch/arm/mm/tlb-fa.S
new file mode 100644
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+++ b/arch/arm/mm/tlb-fa.S
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1/*
2 * linux/arch/arm/mm/tlb-fa.S
3 *
4 * Copyright (C) 2005 Faraday Corp.
5 * Copyright (C) 2008-2009 Paulius Zaleckas <paulius.zaleckas@teltonika.lt>
6 *
7 * Based on tlb-v4wbi.S:
8 * Copyright (C) 1997-2002 Russell King
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
13 *
14 * ARM architecture version 4, Faraday variation.
15 * This assume an unified TLBs, with a write buffer, and branch target buffer (BTB)
16 *
17 * Processors: FA520 FA526 FA626
18 */
19#include <linux/linkage.h>
20#include <linux/init.h>
21#include <asm/asm-offsets.h>
22#include <asm/tlbflush.h>
23#include "proc-macros.S"
24
25
26/*
27 * flush_user_tlb_range(start, end, mm)
28 *
29 * Invalidate a range of TLB entries in the specified address space.
30 *
31 * - start - range start address
32 * - end - range end address
33 * - mm - mm_struct describing address space
34 */
35 .align 4
36ENTRY(fa_flush_user_tlb_range)
37 vma_vm_mm ip, r2
38 act_mm r3 @ get current->active_mm
39 eors r3, ip, r3 @ == mm ?
40 movne pc, lr @ no, we dont do anything
41 mov r3, #0
42 mcr p15, 0, r3, c7, c10, 4 @ drain WB
43 bic r0, r0, #0x0ff
44 bic r0, r0, #0xf00
451: mcr p15, 0, r0, c8, c7, 1 @ invalidate UTLB entry
46 add r0, r0, #PAGE_SZ
47 cmp r0, r1
48 blo 1b
49 mcr p15, 0, r3, c7, c5, 6 @ invalidate BTB
50 mcr p15, 0, r3, c7, c10, 4 @ data write barrier
51 mov pc, lr
52
53
54ENTRY(fa_flush_kern_tlb_range)
55 mov r3, #0
56 mcr p15, 0, r3, c7, c10, 4 @ drain WB
57 bic r0, r0, #0x0ff
58 bic r0, r0, #0xf00
591: mcr p15, 0, r0, c8, c7, 1 @ invalidate UTLB entry
60 add r0, r0, #PAGE_SZ
61 cmp r0, r1
62 blo 1b
63 mcr p15, 0, r3, c7, c5, 6 @ invalidate BTB
64 mcr p15, 0, r3, c7, c10, 4 @ data write barrier
65 mcr p15, 0, r3, c7, c5, 4 @ prefetch flush
66 mov pc, lr
67
68 __INITDATA
69
70 .type fa_tlb_fns, #object
71ENTRY(fa_tlb_fns)
72 .long fa_flush_user_tlb_range
73 .long fa_flush_kern_tlb_range
74 .long fa_tlb_flags
75 .size fa_tlb_fns, . - fa_tlb_fns