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1da177e4 LT |
1 | /* |
2 | * linux/arch/arm/mm/tlbv4wbi.S | |
3 | * | |
4 | * Copyright (C) 1997-2002 Russell King | |
5 | * | |
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. | |
9 | * | |
10 | * ARM architecture version 4 and version 5 TLB handling functions. | |
11 | * These assume a split I/D TLBs, with a write buffer. | |
12 | * | |
13 | * Processors: ARM920 ARM922 ARM925 ARM926 XScale | |
14 | */ | |
15 | #include <linux/linkage.h> | |
16 | #include <linux/init.h> | |
e6ae744d | 17 | #include <asm/asm-offsets.h> |
1da177e4 LT |
18 | #include <asm/tlbflush.h> |
19 | #include "proc-macros.S" | |
20 | ||
21 | /* | |
22 | * v4wb_flush_user_tlb_range(start, end, mm) | |
23 | * | |
24 | * Invalidate a range of TLB entries in the specified address space. | |
25 | * | |
26 | * - start - range start address | |
27 | * - end - range end address | |
28 | * - mm - mm_struct describing address space | |
29 | */ | |
30 | .align 5 | |
31 | ENTRY(v4wbi_flush_user_tlb_range) | |
32 | vma_vm_mm ip, r2 | |
33 | act_mm r3 @ get current->active_mm | |
34 | eors r3, ip, r3 @ == mm ? | |
35 | movne pc, lr @ no, we dont do anything | |
36 | mov r3, #0 | |
37 | mcr p15, 0, r3, c7, c10, 4 @ drain WB | |
38 | vma_vm_flags r2, r2 | |
39 | bic r0, r0, #0x0ff | |
40 | bic r0, r0, #0xf00 | |
41 | 1: tst r2, #VM_EXEC | |
42 | mcrne p15, 0, r0, c8, c5, 1 @ invalidate I TLB entry | |
43 | mcr p15, 0, r0, c8, c6, 1 @ invalidate D TLB entry | |
44 | add r0, r0, #PAGE_SZ | |
45 | cmp r0, r1 | |
46 | blo 1b | |
47 | mov pc, lr | |
48 | ||
49 | ENTRY(v4wbi_flush_kern_tlb_range) | |
50 | mov r3, #0 | |
51 | mcr p15, 0, r3, c7, c10, 4 @ drain WB | |
52 | bic r0, r0, #0x0ff | |
53 | bic r0, r0, #0xf00 | |
54 | 1: mcr p15, 0, r0, c8, c5, 1 @ invalidate I TLB entry | |
55 | mcr p15, 0, r0, c8, c6, 1 @ invalidate D TLB entry | |
56 | add r0, r0, #PAGE_SZ | |
57 | cmp r0, r1 | |
58 | blo 1b | |
59 | mov pc, lr | |
60 | ||
61 | __INITDATA | |
62 | ||
63 | .type v4wbi_tlb_fns, #object | |
64 | ENTRY(v4wbi_tlb_fns) | |
65 | .long v4wbi_flush_user_tlb_range | |
66 | .long v4wbi_flush_kern_tlb_range | |
67 | .long v4wbi_tlb_flags | |
68 | .size v4wbi_tlb_fns, . - v4wbi_tlb_fns |