1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
|
/* SPDX-License-Identifier: GPL-2.0-only */
/*
* linux/arch/unicore32/mm/tlb-ucv2.S
*
* Code specific to PKUnity SoC and UniCore ISA
*
* Copyright (C) 2001-2010 GUAN Xue-tao
*/
#include <linux/init.h>
#include <linux/linkage.h>
#include <asm/assembler.h>
#include <asm/page.h>
#include <asm/tlbflush.h>
#include "proc-macros.S"
/*
* __cpu_flush_user_tlb_range(start, end, vma)
*
* Invalidate a range of TLB entries in the specified address space.
*
* - start - start address (may not be aligned)
* - end - end address (exclusive, may not be aligned)
* - vma - vma_struct describing address range
*/
ENTRY(__cpu_flush_user_tlb_range)
#ifndef CONFIG_CPU_TLB_SINGLE_ENTRY_DISABLE
mov r0, r0 >> #PAGE_SHIFT @ align address
mov r0, r0 << #PAGE_SHIFT
vma_vm_flags r2, r2 @ get vma->vm_flags
1:
movc p0.c6, r0, #3
nop8
cand.a r2, #VM_EXEC @ Executable area ?
beq 2f
movc p0.c6, r0, #5
nop8
2:
add r0, r0, #PAGE_SZ
csub.a r0, r1
beb 1b
#else
movc p0.c6, r0, #2
nop8
cand.a r2, #VM_EXEC @ Executable area ?
beq 2f
movc p0.c6, r0, #4
nop8
2:
#endif
mov pc, lr
/*
* __cpu_flush_kern_tlb_range(start,end)
*
* Invalidate a range of kernel TLB entries
*
* - start - start address (may not be aligned)
* - end - end address (exclusive, may not be aligned)
*/
ENTRY(__cpu_flush_kern_tlb_range)
#ifndef CONFIG_CPU_TLB_SINGLE_ENTRY_DISABLE
mov r0, r0 >> #PAGE_SHIFT @ align address
mov r0, r0 << #PAGE_SHIFT
1:
movc p0.c6, r0, #3
nop8
movc p0.c6, r0, #5
nop8
add r0, r0, #PAGE_SZ
csub.a r0, r1
beb 1b
#else
movc p0.c6, r0, #2
nop8
movc p0.c6, r0, #4
nop8
#endif
mov pc, lr
|
