]>
Commit | Line | Data |
---|---|---|
2ef2b01e A |
1 | /** @file\r |
2 | \r | |
3 | Copyright (c) 2008-2009, Apple Inc. All rights reserved.\r | |
4 | \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 | **/\r | |
14 | \r | |
15 | #include <Base.h>\r | |
16 | \r | |
17 | #include <Library/BaseLib.h>\r | |
18 | #include <Library/TimerLib.h>\r | |
19 | #include <Library/DebugLib.h>\r | |
20 | #include <Library/PcdLib.h>\r | |
21 | #include <Library/IoLib.h>\r | |
22 | #include <Library/OmapLib.h>\r | |
23 | \r | |
24 | #include <Omap3530/Omap3530.h>\r | |
25 | \r | |
26 | UINTN\r | |
27 | EFIAPI\r | |
28 | MicroSecondDelay (\r | |
29 | IN UINTN MicroSeconds\r | |
30 | )\r | |
31 | {\r | |
32 | UINT64 NanoSeconds;\r | |
33 | \r | |
34 | NanoSeconds = MultU64x32(MicroSeconds, 1000);\r | |
35 | \r | |
36 | while (NanoSeconds > (UINTN)-1) { \r | |
37 | NanoSecondDelay((UINTN)-1);\r | |
38 | NanoSeconds -= (UINTN)-1;\r | |
39 | }\r | |
40 | \r | |
41 | NanoSecondDelay(NanoSeconds);\r | |
42 | \r | |
43 | return MicroSeconds;\r | |
44 | }\r | |
45 | \r | |
46 | UINTN\r | |
47 | EFIAPI\r | |
48 | NanoSecondDelay (\r | |
49 | IN UINTN NanoSeconds\r | |
50 | )\r | |
51 | {\r | |
52 | UINT32 Delay;\r | |
53 | UINT32 StartTime;\r | |
54 | UINT32 CurrentTime;\r | |
55 | UINT32 ElapsedTime;\r | |
56 | UINT32 TimerCountRegister;\r | |
57 | \r | |
58 | Delay = (NanoSeconds / PcdGet32(PcdEmbeddedFdPerformanceCounterPeriodInNanoseconds)) + 1;\r | |
59 | \r | |
60 | TimerCountRegister = TimerBase(PcdGet32(PcdBeagleFreeTimer)) + GPTIMER_TCRR;\r | |
61 | \r | |
62 | StartTime = MmioRead32(TimerCountRegister);\r | |
63 | \r | |
64 | do \r | |
65 | {\r | |
66 | CurrentTime = MmioRead32(TimerCountRegister);\r | |
67 | ElapsedTime = CurrentTime - StartTime;\r | |
68 | } while (ElapsedTime < Delay);\r | |
69 | \r | |
70 | NanoSeconds = ElapsedTime * PcdGet32(PcdEmbeddedFdPerformanceCounterPeriodInNanoseconds);\r | |
71 | \r | |
72 | return NanoSeconds;\r | |
73 | }\r | |
74 | \r | |
75 | UINT64\r | |
76 | EFIAPI\r | |
77 | GetPerformanceCounter (\r | |
78 | VOID\r | |
79 | )\r | |
80 | { \r | |
81 | return (UINT64)MmioRead32(TimerBase(PcdGet32(PcdBeagleFreeTimer)) + GPTIMER_TCRR);\r | |
82 | }\r | |
83 | \r | |
84 | UINT64\r | |
85 | EFIAPI\r | |
86 | GetPerformanceCounterProperties (\r | |
87 | OUT UINT64 *StartValue, OPTIONAL\r | |
88 | OUT UINT64 *EndValue OPTIONAL\r | |
89 | )\r | |
90 | {\r | |
91 | if (StartValue != NULL) {\r | |
92 | // Timer starts with the reload value\r | |
93 | *StartValue = (UINT64)MmioRead32(TimerBase(PcdGet32(PcdBeagleFreeTimer)) + GPTIMER_TLDR);\r | |
94 | }\r | |
95 | \r | |
96 | if (EndValue != NULL) {\r | |
97 | // Timer counts up to 0xFFFFFFFF\r | |
98 | *EndValue = 0xFFFFFFFF;\r | |
99 | }\r | |
100 | \r | |
101 | return PcdGet64(PcdEmbeddedPerformanceCounterFreqencyInHz);\r | |
102 | }\r |