diff options
Diffstat (limited to 'arch/x86_64/src/devices/legacy_pit.cpp')
| -rw-r--r-- | arch/x86_64/src/devices/legacy_pit.cpp | 60 |
1 files changed, 0 insertions, 60 deletions
diff --git a/arch/x86_64/src/devices/legacy_pit.cpp b/arch/x86_64/src/devices/legacy_pit.cpp deleted file mode 100644 index d542d47..0000000 --- a/arch/x86_64/src/devices/legacy_pit.cpp +++ /dev/null @@ -1,60 +0,0 @@ -#include <arch/devices/legacy_pit.hpp> - -#include <arch/device_io/port_io.hpp> - -#include <kapi/devices.hpp> -#include <kapi/devices/device.hpp> -#include <kapi/interrupts.hpp> - -#include <cstddef> -#include <cstdint> - -namespace arch::devices -{ - - namespace - { - using command_port = io::port<0x43, std::uint8_t, io::port_write>; - using channel_0_port = io::port<0x40, std::uint8_t, io::port_write>; - using channel_1_port = io::port<0x41, std::uint8_t, io::port_write>; - using channel_2_port = io::port<0x42, std::uint8_t, io::port_write>; - - constexpr auto base_frequency = 1'193'182u; - constexpr auto square_wave_mode = 0x36; - } // namespace - - legacy_pit::legacy_pit(std::size_t major, std::uint32_t frequency_in_hz) - : kapi::devices::device{major, 0, "legacy_pit"} - , m_irq_number{0} - , m_frequency_in_hz{frequency_in_hz} - {} - - auto legacy_pit::init() -> bool - { - auto divisor = static_cast<std::uint16_t>(base_frequency / m_frequency_in_hz); - - kapi::interrupts::register_handler(m_irq_number, *this); - - command_port::write<std::uint8_t>(square_wave_mode); - io::wait(); - channel_0_port::write<std::uint8_t>(divisor & 0xff); - io::wait(); - channel_0_port::write<std::uint8_t>(divisor >> 8 & 0xff); - io::wait(); - - return true; - } - - auto legacy_pit::handle_interrupt(std::uint32_t irq_number) -> kapi::interrupts::status - { - if (irq_number != m_irq_number) - { - return kapi::interrupts::status::unhandled; - } - - ++m_ticks; - - return kapi::interrupts::status::handled; - } - -} // namespace arch::devices
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