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
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
|
/*
* File : mips_excpt_asm.S
* This file is part of RT-Thread RTOS
* COPYRIGHT (C) 2008 - 2012, RT-Thread Development Team
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Change Logs:
* Date Author Notes
* 2016��9��7�� Urey the first version
*/
#ifndef __ASSEMBLY__
# define __ASSEMBLY__
#endif
#include "../common/mips.h"
#define _EXC_STKSIZE 20*1024
;/*********************************************************************************************************
; PTE BASE ��ض���
;*********************************************************************************************************/
#define PTE_BASE_OFFSET 23
#define PTE_BASE_SIZE 9
#define MIPS32_BADVPN2_SHIFT 2
.section ".text", "ax"
.set noreorder
LEAF(mips_tlb_refill_handlerx)
.set push
.set noat
.set noreorder
.set volatile
;/*
; * K1 = CP0_CTXT
; * K0 = K1
; */
mfc0 k1 , CP0_CONTEXT ;/* K1 ���� Context �Ĵ��� */
ehb
move k0 , k1 ;/* K0 ���� Context �Ĵ��� */
;/*
; * K1 <<= PTE_BASE_SIZE
; * K1 >>= PTE_BASE_SIZE
; * K1 >>= 4
; * K1 >>= MIPS32_BADVPN2_SHIFT
; * K1 <<= 3
; */
sll k1 , PTE_BASE_SIZE
srl k1 , (PTE_BASE_SIZE + 4 + MIPS32_BADVPN2_SHIFT) ;/* K1 Ϊ BAD VPN2 */
sll k1 , (4 - 1)
;/*
; * K0 >>= PTE_BASE_OFFSET
; * K0 <<= PTE_BASE_OFFSET
; */
srl k0 , PTE_BASE_OFFSET
sll k0 , PTE_BASE_OFFSET ;/* K0 Ϊ PTE BASE */
;/*
; * K1 = K1 | K0
; */
or k1 , k1 , k0 ;/* �ϳ� */
;/*
; * K0 = *K1
; * K1 = *(K1 + 4)
; */
lw k0 , 0(k1)
lw k1 , 4(k1)
;/*
; * CP0_TLBLO0 = K0
; * CP0_TLBLO1 = K1
; */
mtc0 k0 , CP0_ENTRYLO0 ;/* EntryLo0 */
mtc0 k1 , CP0_ENTRYLO1 ;/* EntryLo1 */
ehb
tlbwr ;/* TLB ����滻 */
eret ;/* �쳣���� */
.set pop
END(mips_tlb_refill_handlerx)
|
