Kernel: Remove lai as a dependecy

I don't think lai is needed anymore, since my own AML interpreter
can do ACPI poweroff which was all that lai was used for.

.gitmodules

@@ -1,4 +0,0 @@
-[submodule "kernel/lai"]
-	path = kernel/lai
-	url = https://github.com/managarm/lai.git
-	ignore = untracked

README.md

@@ -14,9 +14,9 @@ This is my hobby operating system written in C++. Currently supports x86\_64 and
 - [x] Linear framebuffer (VESA and GOP)
 - [x] Network stack
 - [x] ELF executable loading
+- [x] AML interpreter (partial)
 - [ ] ELF dynamic linking
 - [ ] Graphical desktop
-- [ ] AML interpreter (currenly using [lai](https://github.com/managarm/lai))
 
 #### Drivers
 - [x] NVMe disks

kernel/CMakeLists.txt

@@ -119,13 +119,6 @@ if("${BANAN_ARCH}" STREQUAL "x86_64")
 		arch/x86_64/Syscall.S
 		arch/x86_64/Thread.S
 	)
-	file(GLOB_RECURSE LAI_SOURCES
-		lai/*.c
-	)
-	set(LAI_SOURCES
-		${LAI_SOURCES}
-		kernel/lai_host.cpp
-	)
 elseif("${BANAN_ARCH}" STREQUAL "i686")
 	set(KERNEL_SOURCES
 		${KERNEL_SOURCES}
@@ -197,7 +190,6 @@ set_source_files_properties(${LAI_SOURCES} PROPERTIES COMPILE_FLAGS -Wno-stack-u
 
 add_custom_target(kernel-headers
 	COMMAND ${CMAKE_COMMAND} -E copy_directory_if_different ${CMAKE_CURRENT_SOURCE_DIR}/include/ ${BANAN_INCLUDE}/
-	COMMAND ${CMAKE_COMMAND} -E copy_directory_if_different ${CMAKE_CURRENT_SOURCE_DIR}/lai/include/ ${BANAN_INCLUDE}/
 	DEPENDS sysroot
 )
 

kernel/include/kernel/InterruptController.h

@@ -30,8 +30,6 @@ namespace Kernel
 
 		bool is_using_apic() const { return m_using_apic; }
 
-		void enter_acpi_mode();
-
 	private:
 		bool m_using_apic { false };
 	};

kernel/kernel/ACPI/ACPI.cpp

@@ -10,8 +10,6 @@
 #include <kernel/IO.h>
 #include <kernel/Memory/PageTable.h>
 
-#include <lai/core.h>
-
 #define RSPD_SIZE	20
 #define RSPDv2_SIZE	36
 
@@ -42,9 +40,6 @@ namespace Kernel::ACPI
 		ASSERT(dsdt);
 		s_instance->m_namespace = AML::initialize_namespace(*dsdt);
 
-#if ARCH(x86_64)
-		lai_create_namespace();
-#endif
 		return {};
 	}
 
@@ -106,9 +101,6 @@ namespace Kernel::ACPI
 		const RSDP* rsdp = locate_rsdp();
 		if (rsdp == nullptr)
 			return BAN::Error::from_error_code(ErrorCode::ACPI_NoRootSDT);
-#if ARCH(x86_64)
-		lai_set_acpi_revision(rsdp->revision);
-#endif
 
 		uint32_t root_entry_count = 0;
 

kernel/kernel/InterruptController.cpp

@@ -3,8 +3,6 @@
 #include <kernel/APIC.h>
 #include <kernel/PIC.h>
 
-#include <lai/helpers/sci.h>
-
 namespace Kernel
 {
 
@@ -45,12 +43,4 @@ namespace Kernel
 		return s_instance;
 	}
 
-	void InterruptController::enter_acpi_mode()
-	{
-#if ARCH(x86_64)
-		if (lai_enable_acpi(m_using_apic ? 1 : 0) != 0)
-#endif
-			dwarnln("could not enter acpi mode");
-	}
-
 }

kernel/kernel/Process.cpp

@@ -1,5 +1,6 @@
 #include <BAN/ScopeGuard.h>
 #include <BAN/StringView.h>
+#include <kernel/ACPI/ACPI.h>
 #include <kernel/FS/DevFS/FileSystem.h>
 #include <kernel/FS/ProcFS/FileSystem.h>
 #include <kernel/FS/VirtualFileSystem.h>
@@ -17,8 +18,6 @@
 
 #include <LibELF/LoadableELF.h>
 
-#include <lai/helpers/pm.h>
-
 #include <fcntl.h>
 #include <stdio.h>
 #include <sys/banan-os.h>
@@ -1191,11 +1190,7 @@ namespace Kernel
 
 	[[noreturn]] static void reset_system()
 	{
-#if ARCH(x86_64)
+		// TODO: ACPI reset
-		lai_acpi_reset();
-#endif
-
-		// acpi reset did not work
 
 		dwarnln("Could not reset with ACPI, crashing the cpu");
 
@@ -1215,13 +1210,7 @@ namespace Kernel
 		if (command == POWEROFF_REBOOT)
 			reset_system();
 
-#if ARCH(x86_64)
+		ACPI::ACPI::get().poweroff();
-		auto error = lai_enter_sleep(5);
-		// If we reach here, there was an error
-		dprintln("{}", lai_api_error_to_string(error));
-#else
-		dprintln("poweroff available only on x86_64");
-#endif
 
 		return BAN::Error::from_errno(EUNKNOWN);
 	}

kernel/kernel/lai_host.cpp

@@ -1,149 +0,0 @@
-#include <kernel/ACPI/ACPI.h>
-#include <kernel/IO.h>
-#include <kernel/Memory/kmalloc.h>
-#include <kernel/Memory/PageTable.h>
-#include <kernel/PCI.h>
-#include <kernel/Timer/Timer.h>
-
-#include <lai/host.h>
-
-using namespace Kernel;
-
-void* laihost_malloc(size_t size)
-{
-	return kmalloc(size);
-}
-
-void* laihost_realloc(void* ptr, size_t newsize, size_t oldsize)
-{
-	if (ptr == nullptr)
-		return laihost_malloc(newsize);
-
-	void* new_ptr = laihost_malloc(newsize);
-	if (new_ptr == nullptr)
-		return nullptr;
-
-	memcpy(new_ptr, ptr, BAN::Math::min(newsize, oldsize));
-	kfree(ptr);
-
-	return new_ptr;
-}
-
-void laihost_free(void* ptr, size_t)
-{
-	kfree(ptr);
-}
-
-void laihost_log(int level, const char* msg)
-{
-	if (level == LAI_DEBUG_LOG)
-		dprintln(msg);
-	else if (level == LAI_WARN_LOG)
-		dwarnln(msg);
-	else
-		ASSERT_NOT_REACHED();
-}
-
-void laihost_panic(const char* msg)
-{
-	Kernel::panic(msg);
-}
-
-void* laihost_scan(const char* sig, size_t index)
-{
-	return (void*)ACPI::ACPI::get().get_header(sig, index);
-}
-
-void* laihost_map(size_t address, size_t count)
-{
-	size_t needed_pages = range_page_count(address, count);
-	vaddr_t vaddr = PageTable::kernel().reserve_free_contiguous_pages(needed_pages, KERNEL_OFFSET);
-	ASSERT(vaddr);
-
-	PageTable::kernel().map_range_at(address & PAGE_ADDR_MASK, vaddr, needed_pages * PAGE_SIZE, PageTable::Flags::ReadWrite | PageTable::Flags::Present);
-
-	return (void*)(vaddr + (address % PAGE_SIZE));
-}
-
-void laihost_unmap(void* ptr, size_t count)
-{
-	PageTable::kernel().unmap_range((vaddr_t)ptr, count);
-}
-
-void laihost_outb(uint16_t port, uint8_t val)
-{
-	IO::outb(port, val);
-}
-
-void laihost_outw(uint16_t port, uint16_t val)
-{
-	IO::outw(port, val);
-}
-
-void laihost_outd(uint16_t port, uint32_t val)
-{
-	IO::outl(port, val);
-}
-
-uint8_t laihost_inb(uint16_t port)
-{
-	return IO::inb(port);
-}
-
-uint16_t laihost_inw(uint16_t port)
-{
-	return IO::inw(port);
-}
-
-uint32_t laihost_ind(uint16_t port)
-{
-	return IO::inl(port);
-}
-
-void laihost_pci_writeb(uint16_t seg, uint8_t bus, uint8_t slot, uint8_t fun, uint16_t offset, uint8_t val)
-{
-	ASSERT(seg == 0);
-	PCI::PCIManager::write_config_byte(bus, slot, fun, offset, val);
-}
-
-void laihost_pci_writew(uint16_t seg, uint8_t bus, uint8_t slot, uint8_t fun, uint16_t offset, uint16_t val)
-{
-	ASSERT(seg == 0);
-	PCI::PCIManager::write_config_word(bus, slot, fun, offset, val);
-}
-
-void laihost_pci_writed(uint16_t seg, uint8_t bus, uint8_t slot, uint8_t fun, uint16_t offset, uint32_t val)
-{
-	ASSERT(seg == 0);
-	PCI::PCIManager::write_config_dword(bus, slot, fun, offset, val);
-}
-
-uint8_t laihost_pci_readb(uint16_t seg, uint8_t bus, uint8_t slot, uint8_t fun, uint16_t offset)
-{
-	ASSERT(seg == 0);
-	return PCI::PCIManager::read_config_byte(bus, slot, fun, offset);
-}
-
-uint16_t laihost_pci_readw(uint16_t seg, uint8_t bus, uint8_t slot, uint8_t fun, uint16_t offset)
-{
-	ASSERT(seg == 0);
-	return PCI::PCIManager::read_config_word(bus, slot, fun, offset);
-
-}
-
-uint32_t laihost_pci_readd(uint16_t seg, uint8_t bus, uint8_t slot, uint8_t fun, uint16_t offset)
-{
-	ASSERT(seg == 0);
-	return PCI::PCIManager::read_config_dword(bus, slot, fun, offset);
-}
-
-void laihost_sleep(uint64_t ms)
-{
-	SystemTimer::get().sleep(ms);
-}
-
-uint64_t laihost_timer(void)
-{
-	auto time = SystemTimer::get().time_since_boot();
-	return (1'000'000'000ull * time.tv_sec + time.tv_nsec) / 100;
-}

kernel/lai

@@ -1 +0,0 @@
-Subproject commit a228465314ee3a542f62d4bdefeb8fbe2b48da41