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https://github.com/SerenityOS/serenity
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Kernel: Add basic aarch64 support to MemoryManager
FIXME: There's still a lot to do like for example, port `quickmap_page`. This does however get us further into the boot process than before.
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@ -5,6 +5,7 @@
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <Kernel/Arch/aarch64/ASM_wrapper.h>
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#include <Kernel/Memory/PageDirectory.h>
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namespace Kernel::Memory {
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@ -27,7 +28,7 @@ LockRefPtr<PageDirectory> PageDirectory::find_current()
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void activate_kernel_page_directory(PageDirectory const&)
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{
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VERIFY_NOT_REACHED();
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// FIXME: Implement this
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}
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void activate_page_directory(PageDirectory const&, Thread*)
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@ -39,4 +39,9 @@ void Processor::initialize(u32 cpu)
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asm volatile("wfi");
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}
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void Processor::flush_tlb_local(VirtualAddress, size_t)
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{
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// FIXME: Implement this
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}
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}
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@ -13,8 +13,7 @@
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#include <Kernel/Arch/ProcessorSpecificDataID.h>
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#include <Kernel/Arch/aarch64/Registers.h>
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class VirtualAddress;
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#include <Kernel/VirtualAddress.h>
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namespace Kernel {
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@ -36,18 +35,19 @@ struct [[gnu::aligned(16)]] FPUState
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extern Processor* g_current_processor;
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class Processor {
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void* m_processor_specific_data[static_cast<size_t>(ProcessorSpecificDataID::__Count)];
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public:
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void initialize(u32 cpu);
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void set_specific(ProcessorSpecificDataID /*specific_id*/, void* /*ptr*/)
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{
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VERIFY_NOT_REACHED();
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}
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template<typename T>
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T* get_specific()
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{
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VERIFY_NOT_REACHED();
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return 0;
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return static_cast<T*>(m_processor_specific_data[static_cast<size_t>(T::processor_specific_data_id())]);
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}
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void set_specific(ProcessorSpecificDataID specific_id, void* ptr)
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{
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m_processor_specific_data[static_cast<size_t>(specific_id)] = ptr;
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}
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ALWAYS_INLINE static void pause()
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@ -76,11 +76,7 @@ public:
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return false;
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}
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ALWAYS_INLINE static void flush_tlb_local(VirtualAddress&, size_t&)
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{
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VERIFY_NOT_REACHED();
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}
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static void flush_tlb_local(VirtualAddress vaddr, size_t page_count);
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ALWAYS_INLINE static void flush_tlb(Memory::PageDirectory const*, VirtualAddress const&, size_t)
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{
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VERIFY_NOT_REACHED();
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@ -26,6 +26,7 @@
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#include <Kernel/Devices/DeviceManagement.h>
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#include <Kernel/Graphics/Console/BootFramebufferConsole.h>
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#include <Kernel/KSyms.h>
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#include <Kernel/Memory/MemoryManager.h>
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#include <Kernel/Panic.h>
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extern "C" void exception_common(Kernel::TrapFrame const* const trap_frame);
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@ -91,6 +92,17 @@ extern "C" [[noreturn]] void init()
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{
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g_in_early_boot = true;
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// FIXME: Don't hardcode this
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multiboot_memory_map_t mmap[] = {
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{ sizeof(struct multiboot_mmap_entry) - sizeof(u32),
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(u64)0x0,
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(u64)0xA2F000,
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MULTIBOOT_MEMORY_AVAILABLE }
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};
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multiboot_memory_map = mmap;
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multiboot_memory_map_count = 1;
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dbgln("Welcome to Serenity OS!");
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dbgln("Imagine this being your ideal operating system.");
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dbgln("Observed deviations from that ideal are shortcomings of your imagination.");
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@ -119,6 +131,9 @@ extern "C" [[noreturn]] void init()
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}
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dmesgln("Starting SerenityOS...");
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dmesgln("Initialize MMU");
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init_page_tables();
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Memory::MemoryManager::initialize(0);
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DeviceManagement::initialize();
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// Invoke all static global constructors in the kernel.
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@ -133,9 +148,6 @@ extern "C" [[noreturn]] void init()
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auto firmware_version = query_firmware_version();
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dmesgln("Firmware version: {}", firmware_version);
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dmesgln("Initialize MMU");
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init_page_tables();
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auto& timer = RPi::Timer::the();
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timer.set_interrupt_interval_usec(1'000'000);
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timer.enable_interrupt_mode();
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@ -146,6 +158,8 @@ extern "C" [[noreturn]] void init()
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// interrupts are working!
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for (;;)
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asm volatile("wfi");
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VERIFY_NOT_REACHED();
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}
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class QueryFirmwareVersionMboxMessage : RPi::Mailbox::Message {
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@ -487,8 +487,10 @@ UNMAP_AFTER_INIT void MemoryManager::initialize_physical_pages()
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auto* pd = reinterpret_cast<PageDirectoryEntry*>(quickmap_page(boot_pd_kernel));
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PageDirectoryEntry& pde = pd[page_directory_index];
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// FIXME: port quickmap_page to aarch64
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#if !ARCH(AARCH64)
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VERIFY(!pde.is_present()); // Nothing should be using this PD yet
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#endif
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// We can't use ensure_pte quite yet!
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pde.set_page_table_base(pt_paddr.get());
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pde.set_user_allowed(false);
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@ -43,7 +43,12 @@ struct multiboot_mmap_entry {
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u64 addr;
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u64 len;
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u32 type;
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#if ARCH(AARCH64)
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// __attribute__((packed)) causes alignment issues on aarch64
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};
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#else
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} __attribute__((packed));
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#endif
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typedef struct multiboot_mmap_entry multiboot_memory_map_t;
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#define MULTIBOOT_INFO_FRAMEBUFFER_INFO (1 << 12)
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