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1 | /** @file\r |
2 | Base Library CPU Functions for all architectures.\r |
3 | \r |
4 | Copyright (c) 2006, Intel Corporation<BR>\r |
5 | All rights reserved. This program and the accompanying materials\r |
6 | are licensed and made available under the terms and conditions of the BSD License\r |
7 | which accompanies this distribution. The full text of the license may be found at\r |
8 | http://opensource.org/licenses/bsd-license.php\r |
9 | \r |
10 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r |
11 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r |
12 | \r |
13 | Module Name: Cpu.c\r |
14 | \r |
15 | **/\r |
16 | \r |
17 | /**\r |
18 | Disables CPU interrupts and returns the interrupt state prior to the disable\r |
19 | operation.\r |
20 | \r |
21 | Disables CPU interrupts and returns the interrupt state prior to the disable\r |
22 | operation.\r |
23 | \r |
24 | @retval TRUE CPU interrupts were enabled on entry to this call.\r |
25 | @retval FALSE CPU interrupts were disabled on entry to this call.\r |
26 | \r |
27 | **/\r |
28 | BOOLEAN\r |
29 | EFIAPI\r |
30 | SaveAndDisableInterrupts (\r |
31 | VOID\r |
32 | )\r |
33 | {\r |
34 | BOOLEAN InterruptState;\r |
35 | \r |
36 | InterruptState = GetInterruptState ();\r |
37 | DisableInterrupts ();\r |
38 | return InterruptState;\r |
39 | }\r |
40 | \r |
41 | /**\r |
42 | Set the current CPU interrupt state.\r |
43 | \r |
44 | Sets the current CPU interrupt state to the state specified by\r |
45 | InterruptState. If InterruptState is TRUE, then interrupts are enabled. If\r |
46 | InterruptState is FALSE, then interrupts are disabled. InterruptState is\r |
47 | returned.\r |
48 | \r |
49 | @param InterruptState TRUE if interrupts should enabled. FALSE if\r |
50 | interrupts should be disabled.\r |
51 | \r |
52 | @return InterruptState\r |
53 | \r |
54 | **/\r |
55 | BOOLEAN\r |
56 | EFIAPI\r |
57 | SetInterruptState (\r |
58 | IN BOOLEAN InterruptState\r |
59 | )\r |
60 | {\r |
61 | if (InterruptState) {\r |
62 | EnableInterrupts ();\r |
63 | } else {\r |
64 | DisableInterrupts ();\r |
65 | }\r |
66 | return InterruptState;\r |
67 | }\r |