From 3dcd14a0570fef3bcc68d7df42fe3ff4cd496f93 Mon Sep 17 00:00:00 2001 From: Felix Morgner Date: Mon, 6 Apr 2026 14:47:37 +0200 Subject: kapi: hook ACPI initialization up to boot process --- kernel/src/acpi/manager.cpp | 54 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 54 insertions(+) create mode 100644 kernel/src/acpi/manager.cpp (limited to 'kernel/src/acpi/manager.cpp') diff --git a/kernel/src/acpi/manager.cpp b/kernel/src/acpi/manager.cpp new file mode 100644 index 0000000..6a17920 --- /dev/null +++ b/kernel/src/acpi/manager.cpp @@ -0,0 +1,54 @@ +#include "kernel/acpi/manager.hpp" + +#include "kapi/acpi.hpp" +#include "kapi/memory.hpp" +#include "kapi/system.hpp" + +#include + +namespace kernel::acpi +{ + + manager::manager(kapi::acpi::root_system_description_pointer const & sdp) + : m_sdp{&sdp} + { + if (m_sdp->signature() != "RSD PTR ") + { + kapi::system::panic("[OS:ACPI] Invalid RSDP signature!"); + } + + if (m_sdp->revision() >= 2) + { + auto const xsdp = static_cast(m_sdp); + if (!xsdp->validate()) + { + kapi::system::panic("[OS:ACPI] Invalid XSDP signature!"); + } + auto physical_extended_table_address = xsdp->table_address(); + auto linear_extended_table_address = kapi::memory::hhdm_to_linear(physical_extended_table_address); + m_rsdt = static_cast(linear_extended_table_address); + m_extended = true; + } + else + { + if (!m_sdp->validate()) + { + kapi::system::panic("[OS:ACPI] Invalid RSDP checksum!"); + } + auto physical_root_table_address = m_sdp->table_address(); + auto linear_root_table_address = kapi::memory::hhdm_to_linear(physical_root_table_address); + m_rsdt = static_cast(linear_root_table_address); + } + } + + auto manager::load_tables() -> bool + { + if (!kapi::acpi::validate_checksum({reinterpret_cast(m_rsdt), m_rsdt->length})) + { + kapi::system::panic("[OS:ACPI] Invalid RSDT checksum!"); + } + + return false; + } + +} // namespace kernel::acpi -- cgit v1.2.3 From 4d938cd31a35cd4322fe914edd568faa5391c9c2 Mon Sep 17 00:00:00 2001 From: Felix Morgner Date: Mon, 6 Apr 2026 15:10:04 +0200 Subject: kernel/acpi: implement basic table discovery --- kernel/src/acpi/manager.cpp | 42 ++++++++++++++++++++++++++++++++++++++++-- 1 file changed, 40 insertions(+), 2 deletions(-) (limited to 'kernel/src/acpi/manager.cpp') diff --git a/kernel/src/acpi/manager.cpp b/kernel/src/acpi/manager.cpp index 6a17920..180d458 100644 --- a/kernel/src/acpi/manager.cpp +++ b/kernel/src/acpi/manager.cpp @@ -4,7 +4,10 @@ #include "kapi/memory.hpp" #include "kapi/system.hpp" +#include + #include +#include namespace kernel::acpi { @@ -43,12 +46,47 @@ namespace kernel::acpi auto manager::load_tables() -> bool { - if (!kapi::acpi::validate_checksum({reinterpret_cast(m_rsdt), m_rsdt->length})) + if (!kapi::acpi::validate_checksum({reinterpret_cast(m_rsdt), m_rsdt->length().value})) { kapi::system::panic("[OS:ACPI] Invalid RSDT checksum!"); } - return false; + auto entry_size = m_extended ? sizeof(std::uint64_t) : sizeof(std::uint32_t); + auto entry_count = (m_rsdt->length().value - sizeof(kapi::acpi::system_description_table_header)) / entry_size; + auto entries_base = + reinterpret_cast(m_rsdt) + sizeof(kapi::acpi::system_description_table_header); + + for (std::size_t i = 0; i < entry_count; ++i) + { + auto physical_table_address = kapi::memory::physical_address{}; + + if (m_extended) + { + auto entry = reinterpret_cast(entries_base + (i * entry_size)); + physical_table_address = kapi::memory::physical_address{*entry}; + } + else + { + auto entry = reinterpret_cast(entries_base + (i * entry_size)); + physical_table_address = kapi::memory::physical_address{*entry}; + } + + auto linear_table_address = kapi::memory::hhdm_to_linear(physical_table_address); + auto table = static_cast(linear_table_address); + + if (!kapi::acpi::validate_checksum({reinterpret_cast(table), table->length().value})) + { + kstd::println(kstd::print_sink::stderr, "[OS:ACPI] Invalid table checksum!"); + } + 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()); + m_tables.emplace(table->signature(), table); + } + } + + return !m_tables.empty(); } } // namespace kernel::acpi -- cgit v1.2.3 From f456f1674d48932846eb7b5ec1df630ad67e7e3d Mon Sep 17 00:00:00 2001 From: Felix Morgner Date: Mon, 6 Apr 2026 17:24:36 +0200 Subject: kernel/acpi: discover local interrupt controllers --- kernel/src/acpi/manager.cpp | 15 +++++++++++++-- 1 file changed, 13 insertions(+), 2 deletions(-) (limited to 'kernel/src/acpi/manager.cpp') 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 #include #include #include +#include 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 + { + if (m_tables.contains(signature)) + { + return kstd::make_observer(m_tables.at(signature)); + } + return nullptr; + } + } // namespace kernel::acpi -- cgit v1.2.3