mirror of https://github.com/acidanthera/audk.git
160 lines
3.5 KiB
C
160 lines
3.5 KiB
C
/** @file
|
|
Debug Agent timer lib for OMAP 35xx.
|
|
|
|
Copyright (c) 2008 - 2010, Apple Inc. All rights reserved.<BR>
|
|
|
|
SPDX-License-Identifier: BSD-2-Clause-Patent
|
|
|
|
**/
|
|
#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;
|
|
UINT32 TimerNumber;
|
|
|
|
TimerNumber = PcdGet32(PcdOmap35xxDebugAgentTimer);
|
|
gVector = InterruptVectorForTimer (TimerNumber);
|
|
|
|
// Set up the timer registers
|
|
TimerBaseAddress = TimerBase (TimerNumber);
|
|
gTISR = TimerBaseAddress + GPTIMER_TISR;
|
|
gTCLR = TimerBaseAddress + GPTIMER_TCLR;
|
|
gTLDR = TimerBaseAddress + GPTIMER_TLDR;
|
|
gTCRR = TimerBaseAddress + GPTIMER_TCRR;
|
|
gTIER = TimerBaseAddress + GPTIMER_TIER;
|
|
|
|
if ((TimerNumber < 2) || (TimerNumber > 9)) {
|
|
// This code assumes one the General Purpose timers is used
|
|
// GPT2 - GPT9
|
|
CpuDeadLoop ();
|
|
}
|
|
// Set source clock for GPT2 - GPT9 to SYS_CLK
|
|
MmioOr32 (CM_CLKSEL_PER, 1 << (TimerNumber - 2));
|
|
|
|
}
|
|
|
|
|
|
/**
|
|
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);
|
|
ArmDataSynchronizationBarrier ();
|
|
|
|
}
|
|
|