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authorandrewfish <andrewfish@6f19259b-4bc3-4df7-8a09-765794883524>2010-04-03 00:34:19 +0000
committerandrewfish <andrewfish@6f19259b-4bc3-4df7-8a09-765794883524>2010-04-03 00:34:19 +0000
commit43263288dd20d9c9d1c1426010c7ea00a6eaeeef (patch)
tree7aa27c5c974ceca7be20ad3d2d7cb269fce5642d /Omap35xxPkg/Library/DebugAgentTimerLib/DebugAgentTimerLib.c
parent1f44ee1077d27dbfa8765decc54856b912c8c938 (diff)
downloadedk2-topics-43263288dd20d9c9d1c1426010c7ea00a6eaeeef.tar.gz
Added DebugAgentTimerLib. Cleaned up .h files and other code.
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@10332 6f19259b-4bc3-4df7-8a09-765794883524
Diffstat (limited to 'Omap35xxPkg/Library/DebugAgentTimerLib/DebugAgentTimerLib.c')
-rwxr-xr-xOmap35xxPkg/Library/DebugAgentTimerLib/DebugAgentTimerLib.c158
1 files changed, 158 insertions, 0 deletions
diff --git a/Omap35xxPkg/Library/DebugAgentTimerLib/DebugAgentTimerLib.c b/Omap35xxPkg/Library/DebugAgentTimerLib/DebugAgentTimerLib.c
new file mode 100755
index 000000000..72b860361
--- /dev/null
+++ b/Omap35xxPkg/Library/DebugAgentTimerLib/DebugAgentTimerLib.c
@@ -0,0 +1,158 @@
+/** @file
+ Debug Agent timer lib for OMAP 35xx.
+
+ Copyright (c) 2008-2010, 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/IoLib.h>
+#include <Library/OmapLib.h>
+#include <Library/ArmLib.h>
+#include <Library/PcdLib.h>
+
+#include <Omap3530/Omap3530.h>
+
+
+volatile UINT32 gVector;
+
+// Cached registers
+volatile UINT32 gTISR;
+volatile UINT32 gTCLR;
+volatile UINT32 gTLDR;
+volatile UINT32 gTCRR;
+volatile UINT32 gTIER;
+
+VOID
+EnableInterruptSource (
+ VOID
+ )
+{
+ UINTN Bank;
+ UINTN Bit;
+
+ // Map vector to FIQ, IRQ is default
+ MmioWrite32 (INTCPS_ILR (gVector), 1);
+
+ Bank = gVector / 32;
+ Bit = 1UL << (gVector % 32);
+
+ MmioWrite32 (INTCPS_MIR_CLEAR(Bank), Bit);
+}
+
+VOID
+DisableInterruptSource (
+ VOID
+ )
+{
+ UINTN Bank;
+ UINTN Bit;
+
+ Bank = gVector / 32;
+ Bit = 1UL << (gVector % 32);
+
+ MmioWrite32 (INTCPS_MIR_SET(Bank), Bit);
+}
+
+
+
+/**
+ Setup all the hardware needed for the debug agents timer.
+
+ This function is used to set up debug enviroment. It may enable interrupts.
+
+**/
+VOID
+EFIAPI
+DebugAgentTimerIntialize (
+ VOID
+ )
+{
+ UINT32 TimerBaseAddress;
+
+
+ gVector = InterruptVectorForTimer (PcdGet32(PcdOmap35xxDebugAgentTimer));
+
+ // Set up the timer registers
+ TimerBaseAddress = TimerBase (PcdGet32(PcdOmap35xxDebugAgentTimer));
+ gTISR = TimerBaseAddress + GPTIMER_TISR;
+ gTCLR = TimerBaseAddress + GPTIMER_TCLR;
+ gTLDR = TimerBaseAddress + GPTIMER_TLDR;
+ gTCRR = TimerBaseAddress + GPTIMER_TCRR;
+ gTIER = TimerBaseAddress + GPTIMER_TIER;
+
+ DisableInterruptSource ();
+}
+
+
+/**
+ Set the period for the debug agent timer. Zero means disable the timer.
+
+ @param[in] TimerPeriodMilliseconds Frequency of the debug agent timer.
+
+**/
+VOID
+EFIAPI
+DebugAgentTimerSetPeriod (
+ IN UINT32 TimerPeriodMilliseconds
+ )
+{
+ UINT64 TimerCount;
+ INT32 LoadValue;
+
+ if (TimerPeriodMilliseconds == 0) {
+ // Turn off GPTIMER3
+ MmioWrite32 (gTCLR, TCLR_ST_OFF);
+
+ DisableInterruptSource ();
+ } else {
+ // Calculate required timer count
+ TimerCount = DivU64x32(TimerPeriodMilliseconds * 1000000, PcdGet32(PcdDebugAgentTimerFreqNanoSeconds));
+
+ // Set GPTIMER5 Load register
+ LoadValue = (INT32) -TimerCount;
+ MmioWrite32 (gTLDR, LoadValue);
+ MmioWrite32 (gTCRR, LoadValue);
+
+ // Enable Overflow interrupt
+ MmioWrite32 (gTIER, TIER_TCAR_IT_DISABLE | TIER_OVF_IT_ENABLE | TIER_MAT_IT_DISABLE);
+
+ // Turn on GPTIMER3, it will reload at overflow
+ MmioWrite32 (gTCLR, TCLR_AR_AUTORELOAD | TCLR_ST_ON);
+
+ EnableInterruptSource ();
+ }
+}
+
+
+/**
+ Perform End Of Interrupt for the debug agent timer. This is called in the
+ interrupt handler after the interrupt has been processed.
+
+**/
+VOID
+EFIAPI
+DebugAgentTimerEndOfInterrupt (
+ VOID
+ )
+{
+ // Clear all timer interrupts
+ MmioWrite32 (gTISR, TISR_CLEAR_ALL);
+
+ // Poll interrupt status bits to ensure clearing
+ while ((MmioRead32 (gTISR) & TISR_ALL_INTERRUPT_MASK) != TISR_NO_INTERRUPTS_PENDING);
+
+ MmioWrite32 (INTCPS_CONTROL, INTCPS_CONTROL_NEWFIQAGR);
+ ArmDataSyncronizationBarrier ();
+
+}
+
+ \ No newline at end of file