2 * linux/arch/arm/mm/tlbv4wbi.S
4 * Copyright (C) 1997-2002 Russell King
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
10 * ARM architecture version 4 and version 5 TLB handling functions.
11 * These assume a split I/D TLBs, with a write buffer.
13 * Processors: ARM920 ARM922 ARM925 ARM926 XScale
15 #include <linux/linkage.h>
16 #include <linux/init.h>
17 #include <asm/constants.h>
18 #include <asm/tlbflush.h>
19 #include "proc-macros.S"
22 * v4wb_flush_user_tlb_range(start, end, mm)
24 * Invalidate a range of TLB entries in the specified address space.
26 * - start - range start address
27 * - end - range end address
28 * - mm - mm_struct describing address space
31 ENTRY(v4wbi_flush_user_tlb_range)
33 act_mm r3 @ get current->active_mm
34 eors r3, ip, r3 @ == mm ?
35 movne pc, lr @ no, we dont do anything
37 mcr p15, 0, r3, c7, c10, 4 @ drain WB
41 #if 0 /* mask by Victor Yu. 06-09-2005 */
43 mcrne p15, 0, r0, c8, c5, 1 @ invalidate I TLB entry
44 mcr p15, 0, r0, c8, c6, 1 @ invalidate D TLB entry
48 #else /* add by Victor Yu. 06-09-2005 */
49 1: mcr p15, 0, r0, c8, c7, 1 @ invalidate UTLB entry
52 bls 1b @ Luke Lee 05/19/2005 blo -> bls
54 #ifdef CONFIG_CPU_FA_BTB
55 mcr p15, 0, r3, c7, c5, 6 @ invalidate BTB
58 #endif /* CONFIG_CPU_FA_BTB */
62 ENTRY(v4wbi_flush_kern_tlb_range)
63 #if 0 /* mask by Victor Yu. 06-09-2005 */
65 mcr p15, 0, r3, c7, c10, 4 @ drain WB
68 1: mcr p15, 0, r0, c8, c5, 1 @ invalidate I TLB entry
69 mcr p15, 0, r0, c8, c6, 1 @ invalidate D TLB entry
74 #else /* add by Victor Yu. 06-09-2005 */
76 mcr p15, 0, r3, c7, c10, 0 @ clean Dcache all 06/03/2005
77 #ifndef CONFIG_CPU_FA_WB_DISABLE
78 mcr p15, 0, r3, c7, c10, 4 @ drain WB
84 mcr p15, 0, r0, c8, c7, 1 @ invalidate UTLB entry
87 bls 1b @ Luke Lee 05/19/2005 blo -> bls
89 #ifdef CONFIG_CPU_FA_BTB
90 mcr p15, 0, r3, c7, c5, 6 @ invalidate BTB
99 .type v4wbi_tlb_fns, #object
101 .long v4wbi_flush_user_tlb_range
102 .long v4wbi_flush_kern_tlb_range
103 .long v4wbi_tlb_flags
104 .size v4wbi_tlb_fns, . - v4wbi_tlb_fns