diff options
author | AJFISH <AJFISH@6f19259b-4bc3-4df7-8a09-765794883524> | 2009-12-06 01:57:05 +0000 |
---|---|---|
committer | AJFISH <AJFISH@6f19259b-4bc3-4df7-8a09-765794883524> | 2009-12-06 01:57:05 +0000 |
commit | 2ef2b01e07c02db339f34004445734a2dbdd80e1 (patch) | |
tree | 19532a6be8d8bdb0aef04bd00c1efb582f6dc841 /BeagleBoardPkg/Library/BeagleBoardTimerLib/TimerLib.c | |
parent | f7753a96ba1653ddd31b01c198a352f6332ac404 (diff) | |
download | edk2-platforms-2ef2b01e07c02db339f34004445734a2dbdd80e1.tar.xz |
Adding support for BeagleBoard.
ArmPkg - Supoprt for ARM specific things that can change as the architecture changes. Plus semihosting JTAG drivers.
EmbeddedPkg - Generic support for an embeddded platform. Including a light weight command line shell.
BeagleBoardPkg - Platform specifics for BeagleBoard. SD Card works, but USB has issues. Looks like a bug in the open source USB stack (Our internal stack works fine).
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@9518 6f19259b-4bc3-4df7-8a09-765794883524
Diffstat (limited to 'BeagleBoardPkg/Library/BeagleBoardTimerLib/TimerLib.c')
-rwxr-xr-x | BeagleBoardPkg/Library/BeagleBoardTimerLib/TimerLib.c | 102 |
1 files changed, 102 insertions, 0 deletions
diff --git a/BeagleBoardPkg/Library/BeagleBoardTimerLib/TimerLib.c b/BeagleBoardPkg/Library/BeagleBoardTimerLib/TimerLib.c new file mode 100755 index 0000000000..1b9a5bac4f --- /dev/null +++ b/BeagleBoardPkg/Library/BeagleBoardTimerLib/TimerLib.c @@ -0,0 +1,102 @@ +/** @file
+
+ Copyright (c) 2008-2009, Apple Inc. All rights reserved.
+
+ All rights reserved. This program and the accompanying materials
+ are licensed and made available under the terms and conditions of the BSD License
+ which accompanies this distribution. The full text of the license may be found at
+ http://opensource.org/licenses/bsd-license.php
+
+ THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+**/
+
+#include <Base.h>
+
+#include <Library/BaseLib.h>
+#include <Library/TimerLib.h>
+#include <Library/DebugLib.h>
+#include <Library/PcdLib.h>
+#include <Library/IoLib.h>
+#include <Library/OmapLib.h>
+
+#include <Omap3530/Omap3530.h>
+
+UINTN
+EFIAPI
+MicroSecondDelay (
+ IN UINTN MicroSeconds
+ )
+{
+ UINT64 NanoSeconds;
+
+ NanoSeconds = MultU64x32(MicroSeconds, 1000);
+
+ while (NanoSeconds > (UINTN)-1) {
+ NanoSecondDelay((UINTN)-1);
+ NanoSeconds -= (UINTN)-1;
+ }
+
+ NanoSecondDelay(NanoSeconds);
+
+ return MicroSeconds;
+}
+
+UINTN
+EFIAPI
+NanoSecondDelay (
+ IN UINTN NanoSeconds
+ )
+{
+ UINT32 Delay;
+ UINT32 StartTime;
+ UINT32 CurrentTime;
+ UINT32 ElapsedTime;
+ UINT32 TimerCountRegister;
+
+ Delay = (NanoSeconds / PcdGet32(PcdEmbeddedFdPerformanceCounterPeriodInNanoseconds)) + 1;
+
+ TimerCountRegister = TimerBase(PcdGet32(PcdBeagleFreeTimer)) + GPTIMER_TCRR;
+
+ StartTime = MmioRead32(TimerCountRegister);
+
+ do
+ {
+ CurrentTime = MmioRead32(TimerCountRegister);
+ ElapsedTime = CurrentTime - StartTime;
+ } while (ElapsedTime < Delay);
+
+ NanoSeconds = ElapsedTime * PcdGet32(PcdEmbeddedFdPerformanceCounterPeriodInNanoseconds);
+
+ return NanoSeconds;
+}
+
+UINT64
+EFIAPI
+GetPerformanceCounter (
+ VOID
+ )
+{
+ return (UINT64)MmioRead32(TimerBase(PcdGet32(PcdBeagleFreeTimer)) + GPTIMER_TCRR);
+}
+
+UINT64
+EFIAPI
+GetPerformanceCounterProperties (
+ OUT UINT64 *StartValue, OPTIONAL
+ OUT UINT64 *EndValue OPTIONAL
+ )
+{
+ if (StartValue != NULL) {
+ // Timer starts with the reload value
+ *StartValue = (UINT64)MmioRead32(TimerBase(PcdGet32(PcdBeagleFreeTimer)) + GPTIMER_TLDR);
+ }
+
+ if (EndValue != NULL) {
+ // Timer counts up to 0xFFFFFFFF
+ *EndValue = 0xFFFFFFFF;
+ }
+
+ return PcdGet64(PcdEmbeddedPerformanceCounterFreqencyInHz);
+}
|