diff options
Diffstat (limited to 'kernel/src')
| -rw-r--r-- | kernel/src/acpi/manager.cpp | 15 | ||||
| -rw-r--r-- | kernel/src/devices/cpu.cpp | 97 | ||||
| -rw-r--r-- | kernel/src/main.cpp | 10 |
3 files changed, 120 insertions, 2 deletions
diff --git a/kernel/src/acpi/manager.cpp b/kernel/src/acpi/manager.cpp index 180d458..300b85e 100644 --- a/kernel/src/acpi/manager.cpp +++ b/kernel/src/acpi/manager.cpp @@ -4,10 +4,12 @@ #include "kapi/memory.hpp" #include "kapi/system.hpp" +#include <kstd/memory> #include <kstd/print> #include <cstddef> #include <cstdint> +#include <string_view> namespace kernel::acpi { @@ -80,8 +82,7 @@ namespace kernel::acpi } else { - kstd::println("[OS:ACPI] Found table: {}@{:#x}/{:#x} OEM: {} Rev: {}", table->signature(), linear_table_address, - physical_table_address, table->oem_id(), table->creator_revision()); + kstd::println("[OS:ACPI] Found '{}' ACPI table", table->signature()); m_tables.emplace(table->signature(), table); } } @@ -89,4 +90,14 @@ namespace kernel::acpi return !m_tables.empty(); } + auto manager::get_table(std::string_view signature) + -> kstd::observer_ptr<kapi::acpi::system_description_table_header const> + { + if (m_tables.contains(signature)) + { + return kstd::make_observer(m_tables.at(signature)); + } + return nullptr; + } + } // namespace kernel::acpi diff --git a/kernel/src/devices/cpu.cpp b/kernel/src/devices/cpu.cpp new file mode 100644 index 0000000..7147368 --- /dev/null +++ b/kernel/src/devices/cpu.cpp @@ -0,0 +1,97 @@ +#include "kernel/devices/cpu.hpp" + +#include "kapi/acpi.hpp" +#include "kapi/devices.hpp" + +#include <kstd/memory> +#include <kstd/print> + +#include <cstddef> +#include <cstdint> +#include <utility> + +namespace kernel::devices +{ + + namespace + { + + auto process_madt(kstd::observer_ptr<kapi::acpi::madt_header const> madt, kapi::devices::bus & cpu) -> void + { + auto static const core_major = kapi::devices::allocate_major_number(); + auto static const lapic_major = kapi::devices::allocate_major_number(); + + auto lapic_address = madt->local_interrupt_controller_address(); + + auto const * current = reinterpret_cast<std::byte const *>(madt.get()) + sizeof(kapi::acpi::madt_header); + auto const * end = reinterpret_cast<std::byte const *>(madt.get()) + madt->length(); + + auto bsp_found = false; + auto core_index = 0; + + while (current < end) + { + auto const * sub_table = reinterpret_cast<kapi::acpi::madt_subtable_header const *>(current); + if (sub_table->type() == 0) + { + auto const * local_apic = reinterpret_cast<kapi::acpi::madt_local_apic const *>(sub_table); + if (local_apic->flags() & 0b11) + { + auto is_bsp = !bsp_found; + bsp_found = true; + + auto apic_id = local_apic->apic_id(); + auto core = kstd::make_unique<kernel::devices::cpu::core>(core_major, core_index, apic_id, is_bsp); + auto lapic = kapi::acpi::create_local_interrupt_controller(lapic_major, core_index, apic_id, lapic_address); + + core->add_child(std::move(lapic)); + cpu.add_child(std::move(core)); + + ++core_index; + } + } + + current += sub_table->length(); + } + + kstd::println("[OS:DEV] Discovered {} CPU cores", core_index); + } + + } // namespace + + cpu::core::core(std::size_t major_number, std::size_t minor_number, std::uint64_t hardware_id, bool is_bsp) + : kapi::devices::bus{major_number, minor_number, "cpu_core"} + , m_hardware_id{hardware_id} + , m_is_bsp{is_bsp} + {} + + auto cpu::core::hardware_id() const -> std::uint64_t + { + return m_hardware_id; + } + + auto cpu::core::is_bsp() const -> bool + { + return m_is_bsp; + } + + cpu::cpu(std::size_t major_number) + : kapi::devices::bus{major_number, 0, "cpu"} + {} + + auto cpu::probe() -> bool + { + auto madt = kapi::acpi::get_table("APIC"); + if (!madt) + { + kstd::println("[OS:DEV] Failed to find ACPI APIC table"); + return false; + } + + auto madt_header = static_cast<kapi::acpi::madt_header const *>(madt.get()); + process_madt(kstd::make_observer(madt_header), *this); + + return true; + } + +} // namespace kernel::devices
\ No newline at end of file diff --git a/kernel/src/main.cpp b/kernel/src/main.cpp index 2eaa2d8..e704955 100644 --- a/kernel/src/main.cpp +++ b/kernel/src/main.cpp @@ -1,3 +1,4 @@ +#include "kapi/acpi.hpp" #include "kapi/boot_modules.hpp" #include "kapi/cio.hpp" #include "kapi/cpu.hpp" @@ -179,6 +180,15 @@ auto main() -> int kstd::println("[OS] Memory subsystem initialized."); kapi::system::memory_initialized(); + auto acpi_root_pointer = kapi::acpi::get_root_pointer(); + if (acpi_root_pointer && acpi_root_pointer->validate()) + { + if (kapi::acpi::init(*acpi_root_pointer)) + { + kstd::println("[OS] ACPI subsystem initialized."); + } + } + kapi::devices::init(); kstd::println("[OS] System root bus initialized."); |