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
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
| /*
| * Copyright (C) 2013-2015 Synopsys, Inc. All rights reserved.
| *
| * SPDX-License-Identifier: GPL-2.0+
| */
|
| #include <linux/linkage.h>
|
| /*
| * Note on the LD/ST addressing modes with address register write-back
| *
| * LD.a same as LD.aw
| *
| * LD.a reg1, [reg2, x] => Pre Incr
| * Eff Addr for load = [reg2 + x]
| *
| * LD.ab reg1, [reg2, x] => Post Incr
| * Eff Addr for load = [reg2]
| */
|
| .macro PUSH reg
| st.a \reg, [%sp, -4]
| .endm
|
| .macro PUSHAX aux
| lr %r9, [\aux]
| PUSH %r9
| .endm
|
| .macro SAVE_R1_TO_R24
| PUSH %r1
| PUSH %r2
| PUSH %r3
| PUSH %r4
| PUSH %r5
| PUSH %r6
| PUSH %r7
| PUSH %r8
| PUSH %r9
| PUSH %r10
| PUSH %r11
| PUSH %r12
| PUSH %r13
| PUSH %r14
| PUSH %r15
| PUSH %r16
| PUSH %r17
| PUSH %r18
| PUSH %r19
| PUSH %r20
| PUSH %r21
| PUSH %r22
| PUSH %r23
| PUSH %r24
| .endm
|
| .macro SAVE_ALL_SYS
| /* saving %r0 to reg->r0 in advance since we read %ecr into it */
| st %r0, [%sp, -8]
| lr %r0, [%ecr] /* all stack addressing is manual so far */
| st %r0, [%sp]
| st %sp, [%sp, -4]
| /* now move %sp to reg->r0 position so we can do "push" automatically */
| sub %sp, %sp, 8
|
| SAVE_R1_TO_R24
| PUSH %r25
| PUSH %gp
| PUSH %fp
| PUSH %blink
| PUSHAX %eret
| PUSHAX %erstatus
| PUSH %lp_count
| PUSHAX %lp_end
| PUSHAX %lp_start
| PUSHAX %erbta
| .endm
|
| .macro SAVE_EXCEPTION_SOURCE
| #ifdef CONFIG_MMU
| /* If MMU exists exception faulting address is loaded in EFA reg */
| lr %r0, [%efa]
| #else
| /* Otherwise in ERET (exception return) reg */
| lr %r0, [%eret]
| #endif
| .endm
|
| ENTRY(memory_error)
| SAVE_ALL_SYS
| SAVE_EXCEPTION_SOURCE
| mov %r1, %sp
| j do_memory_error
| ENDPROC(memory_error)
|
| ENTRY(instruction_error)
| SAVE_ALL_SYS
| SAVE_EXCEPTION_SOURCE
| mov %r1, %sp
| j do_instruction_error
| ENDPROC(instruction_error)
|
| ENTRY(interrupt_handler)
| /* Todo - save and restore CPU context when interrupts will be in use */
| bl do_interrupt_handler
| rtie
| ENDPROC(interrupt_handler)
|
| ENTRY(EV_MachineCheck)
| SAVE_ALL_SYS
| SAVE_EXCEPTION_SOURCE
| mov %r1, %sp
| j do_machine_check_fault
| ENDPROC(EV_MachineCheck)
|
| ENTRY(EV_TLBMissI)
| SAVE_ALL_SYS
| mov %r0, %sp
| j do_itlb_miss
| ENDPROC(EV_TLBMissI)
|
| ENTRY(EV_TLBMissD)
| SAVE_ALL_SYS
| mov %r0, %sp
| j do_dtlb_miss
| ENDPROC(EV_TLBMissD)
|
| ENTRY(EV_TLBProtV)
| SAVE_ALL_SYS
| SAVE_EXCEPTION_SOURCE
| mov %r1, %sp
| j do_tlb_prot_violation
| ENDPROC(EV_TLBProtV)
|
| ENTRY(EV_PrivilegeV)
| SAVE_ALL_SYS
| mov %r0, %sp
| j do_privilege_violation
| ENDPROC(EV_PrivilegeV)
|
| ENTRY(EV_Trap)
| SAVE_ALL_SYS
| mov %r0, %sp
| j do_trap
| ENDPROC(EV_Trap)
|
| ENTRY(EV_Extension)
| SAVE_ALL_SYS
| mov %r0, %sp
| j do_extension
| ENDPROC(EV_Extension)
|
| #ifdef CONFIG_ISA_ARCV2
| ENTRY(EV_SWI)
| SAVE_ALL_SYS
| mov %r0, %sp
| j do_swi
| ENDPROC(EV_SWI)
|
| ENTRY(EV_DivZero)
| SAVE_ALL_SYS
| SAVE_EXCEPTION_SOURCE
| mov %r1, %sp
| j do_divzero
| ENDPROC(EV_DivZero)
|
| ENTRY(EV_DCError)
| SAVE_ALL_SYS
| mov %r0, %sp
| j do_dcerror
| ENDPROC(EV_DCError)
|
| ENTRY(EV_Maligned)
| SAVE_ALL_SYS
| SAVE_EXCEPTION_SOURCE
| mov %r1, %sp
| j do_maligned
| ENDPROC(EV_Maligned)
| #endif
|
|
