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
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
|
------------------------------------------------------------------------------
-- --
-- GNAT RUN-TIME LIBRARY (GNARL) COMPONENTS --
-- --
-- SYSTEM.INTERRUPT_MANAGEMENT.OPERATIONS --
-- --
-- B o d y --
-- --
-- Copyright (C) 1992-2007, Free Software Foundation, Inc. --
-- --
-- GNARL is free software; you can redistribute it and/or modify it under --
-- terms of the GNU General Public License as published by the Free Soft- --
-- ware Foundation; either version 2, or (at your option) any later ver- --
-- sion. GNARL is distributed in the hope that it will be useful, but WITH- --
-- OUT 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 distributed with GNARL; see file COPYING. If not, write --
-- to the Free Software Foundation, 51 Franklin Street, Fifth Floor, --
-- Boston, MA 02110-1301, USA. --
-- --
-- As a special exception, if other files instantiate generics from this --
-- unit, or you link this unit with other files to produce an executable, --
-- this unit does not by itself cause the resulting executable to be --
-- covered by the GNU General Public License. This exception does not --
-- however invalidate any other reasons why the executable file might be --
-- covered by the GNU Public License. --
-- --
-- GNARL was developed by the GNARL team at Florida State University. --
-- Extensive contributions were provided by Ada Core Technologies, Inc. --
-- --
------------------------------------------------------------------------------
-- This is a OpenVMS/Alpha version of this package
with System.OS_Interface;
-- used for various type, constant, and operations
with System.Aux_DEC;
-- used for Short_Address
with System.Parameters;
with System.Tasking;
with System.Tasking.Initialization;
with System.Task_Primitives.Operations;
with System.Task_Primitives.Operations.DEC;
with Ada.Unchecked_Conversion;
package body System.Interrupt_Management.Operations is
use System.OS_Interface;
use System.Parameters;
use System.Tasking;
use type unsigned_short;
function To_Address is
new Ada.Unchecked_Conversion (Task_Id, System.Address);
package POP renames System.Task_Primitives.Operations;
----------------------------
-- Thread_Block_Interrupt --
----------------------------
procedure Thread_Block_Interrupt (Interrupt : Interrupt_ID) is
pragma Warnings (Off, Interrupt);
begin
null;
end Thread_Block_Interrupt;
------------------------------
-- Thread_Unblock_Interrupt --
------------------------------
procedure Thread_Unblock_Interrupt (Interrupt : Interrupt_ID) is
pragma Warnings (Off, Interrupt);
begin
null;
end Thread_Unblock_Interrupt;
------------------------
-- Set_Interrupt_Mask --
------------------------
procedure Set_Interrupt_Mask (Mask : access Interrupt_Mask) is
pragma Warnings (Off, Mask);
begin
null;
end Set_Interrupt_Mask;
procedure Set_Interrupt_Mask
(Mask : access Interrupt_Mask;
OMask : access Interrupt_Mask)
is
pragma Warnings (Off, Mask);
pragma Warnings (Off, OMask);
begin
null;
end Set_Interrupt_Mask;
------------------------
-- Get_Interrupt_Mask --
------------------------
procedure Get_Interrupt_Mask (Mask : access Interrupt_Mask) is
pragma Warnings (Off, Mask);
begin
null;
end Get_Interrupt_Mask;
--------------------
-- Interrupt_Wait --
--------------------
function To_unsigned_long is new
Ada.Unchecked_Conversion (System.Aux_DEC.Short_Address, unsigned_long);
function Interrupt_Wait (Mask : access Interrupt_Mask)
return Interrupt_ID
is
Self_ID : constant Task_Id := Self;
Iosb : IO_Status_Block_Type := (0, 0, 0);
Status : Cond_Value_Type;
begin
-- A QIO read is registered. The system call returns immediately
-- after scheduling an AST to be fired when the operation
-- completes.
Sys_QIO
(Status => Status,
Chan => Rcv_Interrupt_Chan,
Func => IO_READVBLK,
Iosb => Iosb,
Astadr =>
POP.DEC.Interrupt_AST_Handler'Access,
Astprm => To_Address (Self_ID),
P1 => To_unsigned_long (Interrupt_Mailbox'Address),
P2 => Interrupt_ID'Size / 8);
pragma Assert ((Status and 1) = 1);
loop
-- Wait to be woken up. Could be that the AST has fired,
-- in which case the Iosb.Status variable will be non-zero,
-- or maybe the wait is being aborted.
POP.Sleep
(Self_ID,
System.Tasking.Interrupt_Server_Blocked_On_Event_Flag);
if Iosb.Status /= 0 then
if (Iosb.Status and 1) = 1
and then Mask (Signal (Interrupt_Mailbox))
then
return Interrupt_Mailbox;
else
return 0;
end if;
else
POP.Unlock (Self_ID);
if Single_Lock then
POP.Unlock_RTS;
end if;
System.Tasking.Initialization.Undefer_Abort (Self_ID);
System.Tasking.Initialization.Defer_Abort (Self_ID);
if Single_Lock then
POP.Lock_RTS;
end if;
POP.Write_Lock (Self_ID);
end if;
end loop;
end Interrupt_Wait;
----------------------------
-- Install_Default_Action --
----------------------------
procedure Install_Default_Action (Interrupt : Interrupt_ID) is
pragma Warnings (Off, Interrupt);
begin
null;
end Install_Default_Action;
---------------------------
-- Install_Ignore_Action --
---------------------------
procedure Install_Ignore_Action (Interrupt : Interrupt_ID) is
pragma Warnings (Off, Interrupt);
begin
null;
end Install_Ignore_Action;
-------------------------
-- Fill_Interrupt_Mask --
-------------------------
procedure Fill_Interrupt_Mask (Mask : access Interrupt_Mask) is
begin
Mask.all := (others => True);
end Fill_Interrupt_Mask;
--------------------------
-- Empty_Interrupt_Mask --
--------------------------
procedure Empty_Interrupt_Mask (Mask : access Interrupt_Mask) is
begin
Mask.all := (others => False);
end Empty_Interrupt_Mask;
---------------------------
-- Add_To_Interrupt_Mask --
---------------------------
procedure Add_To_Interrupt_Mask
(Mask : access Interrupt_Mask;
Interrupt : Interrupt_ID)
is
begin
Mask (Signal (Interrupt)) := True;
end Add_To_Interrupt_Mask;
--------------------------------
-- Delete_From_Interrupt_Mask --
--------------------------------
procedure Delete_From_Interrupt_Mask
(Mask : access Interrupt_Mask;
Interrupt : Interrupt_ID)
is
begin
Mask (Signal (Interrupt)) := False;
end Delete_From_Interrupt_Mask;
---------------
-- Is_Member --
---------------
function Is_Member
(Mask : access Interrupt_Mask;
Interrupt : Interrupt_ID) return Boolean
is
begin
return Mask (Signal (Interrupt));
end Is_Member;
-------------------------
-- Copy_Interrupt_Mask --
-------------------------
procedure Copy_Interrupt_Mask
(X : out Interrupt_Mask;
Y : Interrupt_Mask)
is
begin
X := Y;
end Copy_Interrupt_Mask;
----------------------------
-- Interrupt_Self_Process --
----------------------------
procedure Interrupt_Self_Process (Interrupt : Interrupt_ID) is
Status : Cond_Value_Type;
begin
Sys_QIO
(Status => Status,
Chan => Snd_Interrupt_Chan,
Func => IO_WRITEVBLK,
P1 => To_unsigned_long (Interrupt'Address),
P2 => Interrupt_ID'Size / 8);
-- The following could use a comment ???
pragma Assert ((Status and 1) = 1);
end Interrupt_Self_Process;
--------------------------
-- Setup_Interrupt_Mask --
--------------------------
procedure Setup_Interrupt_Mask is
begin
null;
end Setup_Interrupt_Mask;
begin
Interrupt_Management.Initialize;
Environment_Mask := (others => False);
All_Tasks_Mask := (others => True);
for J in Interrupt_ID loop
if Keep_Unmasked (J) then
Environment_Mask (Signal (J)) := True;
All_Tasks_Mask (Signal (J)) := False;
end if;
end loop;
end System.Interrupt_Management.Operations;
|
