diff options
Diffstat (limited to 'dev/kernel/HALKit/AMD64/HalTimerAMD64.cc')
| -rw-r--r-- | dev/kernel/HALKit/AMD64/HalTimerAMD64.cc | 114 |
1 files changed, 54 insertions, 60 deletions
diff --git a/dev/kernel/HALKit/AMD64/HalTimerAMD64.cc b/dev/kernel/HALKit/AMD64/HalTimerAMD64.cc index ade41d2f..79165289 100644 --- a/dev/kernel/HALKit/AMD64/HalTimerAMD64.cc +++ b/dev/kernel/HALKit/AMD64/HalTimerAMD64.cc @@ -1,101 +1,95 @@ /* -------------------------------------------
- Copyright (C) 2024-2025, Amlal El Mahrouss, all rights reserved.
+ Copyright (C) 2024-2025, Amlal El Mahrouss, all rights reserved.
- File: HalTimer.cc
- Purpose: HAL timer
+ File: HalTimer.cc
+ Purpose: HAL timer
- Revision History:
+ Revision History:
- 07/07/24: Added file (amlel)
+ 07/07/24: Added file (amlel)
------------------------------------------- */
-#include <modules/ACPI/ACPIFactoryInterface.h>
#include <ArchKit/ArchKit.h>
#include <KernelKit/Timer.h>
+#include <modules/ACPI/ACPIFactoryInterface.h>
// timer slot 0
-#define kHPETCounterRegValue (0x00)
-#define kHPETConfigRegValue (0x20)
-#define kHPETCompRegValue (0x24)
+#define kHPETCounterRegValue (0x00)
+#define kHPETConfigRegValue (0x20)
+#define kHPETCompRegValue (0x24)
#define kHPETInterruptRegValue (0x2C)
///! BUGS: 0
///! @file HalTimer.cc
///! @brief Hardware Timer (HPET)
-namespace Kernel::Detail
-{
- struct HPET_BLOCK : public Kernel::SDT
- {
- Kernel::UInt8 hardware_rev_id;
- Kernel::UInt8 comparator_count : 5;
- Kernel::UInt8 counter_size : 1;
- Kernel::UInt8 reserved : 1;
- Kernel::UInt8 legacy_replacement : 1;
- Kernel::UInt16 pci_vendor_id;
- ACPI_ADDRESS address;
- Kernel::UInt8 hpet_number;
- Kernel::UInt16 minimum_tick;
- Kernel::UInt8 page_protection;
- } PACKED;
-} // namespace Kernel::Detail
+namespace Kernel::Detail {
+struct HPET_BLOCK : public Kernel::SDT {
+ Kernel::UInt8 hardware_rev_id;
+ Kernel::UInt8 comparator_count : 5;
+ Kernel::UInt8 counter_size : 1;
+ Kernel::UInt8 reserved : 1;
+ Kernel::UInt8 legacy_replacement : 1;
+ Kernel::UInt16 pci_vendor_id;
+ ACPI_ADDRESS address;
+ Kernel::UInt8 hpet_number;
+ Kernel::UInt16 minimum_tick;
+ Kernel::UInt8 page_protection;
+} PACKED;
+} // namespace Kernel::Detail
using namespace Kernel;
-HardwareTimer::HardwareTimer(UInt64 ms)
- : fWaitFor(ms)
-{
- auto power = PowerFactoryInterface(kHandoverHeader->f_HardwareTables.f_VendorPtr);
+HardwareTimer::HardwareTimer(UInt64 ms) : fWaitFor(ms) {
+ auto power = PowerFactoryInterface(kHandoverHeader->f_HardwareTables.f_VendorPtr);
- auto hpet = (Detail::HPET_BLOCK*)power.Find("HPET").Leak().Leak();
- MUST_PASS(hpet);
+ auto hpet = (Detail::HPET_BLOCK*) power.Find("HPET").Leak().Leak();
+ MUST_PASS(hpet);
- fDigitalTimer = (UInt8*)hpet->address.Address;
+ fDigitalTimer = (UInt8*) hpet->address.Address;
- if (hpet->page_protection)
- {
- HAL::mm_map_page((VoidPtr)fDigitalTimer, (VoidPtr)fDigitalTimer, HAL::kMMFlagsWr | HAL::kMMFlagsPCD | HAL::kMMFlagsPwt);
- }
+ if (hpet->page_protection) {
+ HAL::mm_map_page((VoidPtr) fDigitalTimer, (VoidPtr) fDigitalTimer,
+ HAL::kMMFlagsWr | HAL::kMMFlagsPCD | HAL::kMMFlagsPwt);
+ }
- // if not enabled yet.
- if (!(*((volatile UInt64*)((UInt8*)fDigitalTimer + kHPETConfigRegValue)) & (1 << 0)))
- {
- *((volatile UInt64*)((UInt8*)fDigitalTimer + kHPETConfigRegValue)) = *((volatile UInt64*)((UInt8*)fDigitalTimer + kHPETConfigRegValue)) | (1 << 0); // enable timer
- *((volatile UInt64*)((UInt8*)fDigitalTimer + kHPETConfigRegValue)) = *((volatile UInt64*)((UInt8*)fDigitalTimer + kHPETConfigRegValue)) | (1 << 3); // one shot conf
- }
+ // if not enabled yet.
+ if (!(*((volatile UInt64*) ((UInt8*) fDigitalTimer + kHPETConfigRegValue)) & (1 << 0))) {
+ *((volatile UInt64*) ((UInt8*) fDigitalTimer + kHPETConfigRegValue)) =
+ *((volatile UInt64*) ((UInt8*) fDigitalTimer + kHPETConfigRegValue)) |
+ (1 << 0); // enable timer
+ *((volatile UInt64*) ((UInt8*) fDigitalTimer + kHPETConfigRegValue)) =
+ *((volatile UInt64*) ((UInt8*) fDigitalTimer + kHPETConfigRegValue)) |
+ (1 << 3); // one shot conf
+ }
}
-HardwareTimer::~HardwareTimer()
-{
- fDigitalTimer = nullptr;
- fWaitFor = 0;
+HardwareTimer::~HardwareTimer() {
+ fDigitalTimer = nullptr;
+ fWaitFor = 0;
}
/***********************************************************************************/
/// @brief Wait for the timer to stop spinning.
/***********************************************************************************/
-BOOL HardwareTimer::Wait() noexcept
-{
- if (fWaitFor < 1)
- return NO;
+BOOL HardwareTimer::Wait() noexcept {
+ if (fWaitFor < 1) return NO;
- UInt64 hpet_cap = *((volatile UInt64*)(fDigitalTimer + kHPETCounterRegValue));
- UInt64 femtoseconds_per_tick = (hpet_cap >> 32);
+ UInt64 hpet_cap = *((volatile UInt64*) (fDigitalTimer + kHPETCounterRegValue));
+ UInt64 femtoseconds_per_tick = (hpet_cap >> 32);
- if (femtoseconds_per_tick == 0)
- return NO;
+ if (femtoseconds_per_tick == 0) return NO;
- volatile UInt64* timer = (volatile UInt64*)(fDigitalTimer + kHPETCounterRegValue);
+ volatile UInt64* timer = (volatile UInt64*) (fDigitalTimer + kHPETCounterRegValue);
- UInt64 now = *timer;
- UInt64 prev = now + (fWaitFor / femtoseconds_per_tick);
+ UInt64 now = *timer;
+ UInt64 prev = now + (fWaitFor / femtoseconds_per_tick);
- while (*timer < (prev))
- asm volatile("pause");
+ while (*timer < (prev)) asm volatile("pause");
- return YES;
+ return YES;
}
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