]>
Commit | Line | Data |
---|---|---|
c69dd9df | 1 | /*++\r |
2 | \r | |
b1f700a8 HT |
3 | Copyright (c) 2005, Intel Corporation. All rights reserved.<BR>\r |
4 | This program and the accompanying materials \r | |
c69dd9df | 5 | are licensed and made available under the terms and conditions of the BSD License \r |
6 | which accompanies this distribution. The full text of the license may be found at \r | |
7 | http://opensource.org/licenses/bsd-license.php \r | |
8 | \r | |
9 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, \r | |
10 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. \r | |
11 | \r | |
12 | Module Name:\r | |
13 | LegacyMetronome.c\r | |
14 | \r | |
15 | Abstract:\r | |
16 | \r | |
17 | This contains the installation function for the driver.\r | |
18 | \r | |
19 | --*/\r | |
20 | \r | |
21 | #include "Metronome.h"\r | |
22 | \r | |
23 | //\r | |
24 | // Handle for the Metronome Architectural Protocol instance produced by this driver\r | |
25 | //\r | |
26 | EFI_HANDLE mMetronomeHandle = NULL;\r | |
27 | \r | |
28 | //\r | |
29 | // The Metronome Architectural Protocol instance produced by this driver\r | |
30 | //\r | |
31 | EFI_METRONOME_ARCH_PROTOCOL mMetronome = {\r | |
32 | WaitForTick,\r | |
33 | TICK_PERIOD\r | |
34 | };\r | |
35 | \r | |
c69dd9df | 36 | //\r |
37 | // Worker Functions\r | |
38 | //\r | |
c69dd9df | 39 | EFI_STATUS\r |
40 | EFIAPI\r | |
41 | WaitForTick (\r | |
42 | IN EFI_METRONOME_ARCH_PROTOCOL *This,\r | |
43 | IN UINT32 TickNumber\r | |
44 | )\r | |
45 | /*++\r | |
46 | \r | |
47 | Routine Description:\r | |
48 | \r | |
49 | Waits for the TickNumber of ticks from a known platform time source.\r | |
50 | \r | |
51 | Arguments:\r | |
52 | \r | |
53 | This Pointer to the protocol instance.\r | |
54 | \r | |
55 | Returns: \r | |
56 | \r | |
57 | EFI_SUCCESS If number of ticks occurred.\r | |
58 | EFI_NOT_FOUND Could not locate CPU IO protocol\r | |
59 | \r | |
60 | --*/\r | |
61 | // TODO: TickNumber - add argument and description to function comment\r | |
62 | {\r | |
63 | //\r | |
64 | // Wait for TickNumber toggles of the Refresh bit\r | |
65 | //\r | |
66 | for (; TickNumber != 0x00; TickNumber--) {\r | |
0f25cc14 | 67 | while ((IoRead8(REFRESH_PORT) & REFRESH_ON) == REFRESH_ON);\r |
68 | while ((IoRead8(REFRESH_PORT) & REFRESH_ON) == REFRESH_OFF);\r | |
c69dd9df | 69 | }\r |
70 | \r | |
71 | return EFI_SUCCESS;\r | |
72 | }\r | |
73 | \r | |
74 | EFI_STATUS\r | |
75 | EFIAPI\r | |
76 | InstallMetronome (\r | |
77 | IN EFI_HANDLE ImageHandle,\r | |
78 | IN EFI_SYSTEM_TABLE *SystemTable\r | |
79 | )\r | |
80 | /*++\r | |
81 | \r | |
82 | Routine Description:\r | |
83 | \r | |
84 | Install the LegacyMetronome driver. Loads a Metronome Arch Protocol based\r | |
85 | on the Port 61 timer.\r | |
86 | \r | |
87 | Arguments:\r | |
88 | \r | |
89 | (Standard EFI Image entry - EFI_IMAGE_ENTRY_POINT)\r | |
90 | \r | |
91 | Returns:\r | |
92 | \r | |
93 | EFI_SUCCESS - Metronome Architectural Protocol Installed\r | |
94 | \r | |
95 | --*/\r | |
96 | // TODO: ImageHandle - add argument and description to function comment\r | |
97 | // TODO: SystemTable - add argument and description to function comment\r | |
98 | {\r | |
99 | EFI_STATUS Status;\r | |
100 | \r | |
101 | //\r | |
102 | // Make sure the Metronome Architectural Protocol is not already installed in the system\r | |
103 | //\r | |
104 | ASSERT_PROTOCOL_ALREADY_INSTALLED (NULL, &gEfiMetronomeArchProtocolGuid);\r | |
105 | \r | |
c69dd9df | 106 | //\r |
107 | // Program port 61 timer 1 as refresh timer. We could use ACPI timer in the\r | |
108 | // future.\r | |
109 | //\r | |
110 | IoWrite8 (TIMER1_CONTROL_PORT, LOAD_COUNTER1_LSB);\r | |
111 | IoWrite8 (TIMER1_COUNT_PORT, COUNTER1_COUNT);\r | |
112 | \r | |
113 | //\r | |
114 | // Install on a new handle\r | |
115 | //\r | |
116 | Status = gBS->InstallMultipleProtocolInterfaces (\r | |
117 | &mMetronomeHandle,\r | |
118 | &gEfiMetronomeArchProtocolGuid,\r | |
119 | &mMetronome,\r | |
120 | NULL\r | |
121 | );\r | |
122 | ASSERT_EFI_ERROR (Status);\r | |
123 | \r | |
124 | return Status;\r | |
125 | }\r |