diff options
| author | Amlal El Mahrouss <amlal.elmahrouss@icloud.com> | 2025-03-23 19:13:48 +0100 |
|---|---|---|
| committer | Amlal El Mahrouss <amlal.elmahrouss@icloud.com> | 2025-03-23 19:15:17 +0100 |
| commit | a13e1c0911c0627184bc38f18c7fdda64447b3ad (patch) | |
| tree | 073a62c09bf216e85a3f310376640fa1805147f9 /dev/kernel/HALKit/AMD64/HalTimerAMD64.cc | |
| parent | 149fa096eb306d03686b3b67e813cf1a78e08cd0 (diff) | |
meta(kernel): Reworked repository's filesystem structure.
Removing useless parts of the project too.
Signed-off-by: Amlal El Mahrouss <amlal.elmahrouss@icloud.com>
Diffstat (limited to 'dev/kernel/HALKit/AMD64/HalTimerAMD64.cc')
| -rw-r--r-- | dev/kernel/HALKit/AMD64/HalTimerAMD64.cc | 86 |
1 files changed, 86 insertions, 0 deletions
diff --git a/dev/kernel/HALKit/AMD64/HalTimerAMD64.cc b/dev/kernel/HALKit/AMD64/HalTimerAMD64.cc new file mode 100644 index 00000000..53386d36 --- /dev/null +++ b/dev/kernel/HALKit/AMD64/HalTimerAMD64.cc @@ -0,0 +1,86 @@ +/* -------------------------------------------
+
+ Copyright (C) 2024-2025, Amlal EL Mahrouss, all rights reserved.
+
+ File: HalTimer.cc
+ Purpose: HAL timer
+
+ Revision History:
+
+ 07/07/24: Added file (amlel)
+
+------------------------------------------- */
+
+#include <modules/ACPI/ACPIFactoryInterface.h>
+#include <ArchKit/ArchKit.h>
+#include <KernelKit/Timer.h>
+
+// timer slot 0
+
+#define cHPETCounterRegValue (0x00)
+#define cHPETConfigRegValue (0x20)
+#define cHPETCompRegValue (0x24)
+#define cHPETInterruptRegValue (0x2C)
+
+///! BUGS: 0
+///! @file HalTimer.cc
+///! @brief Hardware Timer (HPET)
+
+namespace NeOS::Detail
+{
+ struct HPET_BLOCK : public NeOS::SDT
+ {
+ NeOS::UInt8 hardware_rev_id;
+ NeOS::UInt8 comparator_count : 5;
+ NeOS::UInt8 counter_size : 1;
+ NeOS::UInt8 reserved : 1;
+ NeOS::UInt8 legacy_replacement : 1;
+ NeOS::UInt16 pci_vendor_id;
+ ACPI_ADDRESS address;
+ NeOS::UInt8 hpet_number;
+ NeOS::UInt16 minimum_tick;
+ NeOS::UInt8 page_protection;
+ } PACKED;
+} // namespace NeOS::Detail
+
+using namespace NeOS;
+
+HardwareTimer::HardwareTimer(Int64 ms)
+ : fWaitFor(ms)
+{
+ auto power = PowerFactoryInterface(kHandoverHeader->f_HardwareTables.f_VendorPtr);
+
+ auto hpet = (Detail::HPET_BLOCK*)power.Find("HPET").Leak().Leak();
+ MUST_PASS(hpet);
+
+ fDigitalTimer = (IntPtr*)hpet->address.Address;
+}
+
+HardwareTimer::~HardwareTimer()
+{
+ fDigitalTimer = nullptr;
+ fWaitFor = 0;
+}
+
+BOOL HardwareTimer::Wait() noexcept
+{
+ if (fWaitFor < 1)
+ return NO;
+
+ // if not enabled yet.
+ if (!(*(fDigitalTimer + cHPETConfigRegValue) & (1 << 0)))
+ {
+ *(fDigitalTimer + cHPETConfigRegValue) |= (1 << 0); // enable it
+ *(fDigitalTimer + cHPETConfigRegValue) |= (1 << 3); // one shot conf
+ }
+
+ UInt64 ticks = fWaitFor / ((*(fDigitalTimer) >> 32) & __UINT32_MAX__);
+ UInt64 prev = *(fDigitalTimer + cHPETCounterRegValue);
+
+ prev += ticks;
+
+ while (*(fDigitalTimer + cHPETCounterRegValue) < (ticks))
+ ;
+
+ return YES;
+}
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