feat: introduce bootloader-agnostic Boot Contract, add btlist command to list connected Bluetooth devices

kernel/src/Main.cpp

@@ -6,7 +6,7 @@
 
 #include <cstdint>
 #include <cstddef>
-#include <limine.h>
+#include <Boot/Boot.hpp>
 #include <Hal/GDT.hpp>
 #include <Terminal/Terminal.hpp>
 #include <Efi/UEFI.hpp>
@@ -14,7 +14,6 @@
 #include <Memory/Memmap.hpp>
 #include <Memory/Heap.hpp>
 #include <Memory/HHDM.hpp>
-#include <Platform/Limine.hpp>
 #include <Platform/Util.hpp>
 #include <Hal/IDT.hpp>
 #include <Memory/PageFrameAllocator.hpp>
@@ -58,33 +57,33 @@ extern "C" uint64_t KernelStartSymbol;
 extern "C" uint64_t KernelEndSymbol;
 
 extern "C" void kmain() {
-    if (LIMINE_BASE_REVISION_SUPPORTED == false) {
-        Hal::Halt();
-    }
-
     // Call global constructors.
     for (std::size_t i = 0; &__init_array[i] != __init_array_end; i++) {
         __init_array[i]();
     }
 
-    if (framebuffer_request.response == nullptr
-     || framebuffer_request.response->framebuffer_count < 1) {
+    // Acquire the boot environment through the Montauk Boot Contract.  The
+    // active bootloader adapter (see Boot/Protocols/) translates its native
+    // handoff into this bootloader-agnostic structure.  A false return means
+    // we cannot even bring up a console (unsupported loader, no HHDM, or no
+    // framebuffer) -- there is nothing to do but halt.
+    if (!montauk::boot::Initialize()) {
         Hal::Halt();
     }
-    
-    limine_framebuffer *framebuffer{framebuffer_request.response->framebuffers[0]};
+    const montauk::boot::BootInfo& boot = montauk::boot::Info();
+    const montauk::boot::Framebuffer& framebuffer = boot.framebuffer;
 
     Kt::Initialize(
-        (uint32_t*)framebuffer->address,
-        framebuffer->width,
-        framebuffer->height,
-        framebuffer->pitch,
-        framebuffer->red_mask_size,
-        framebuffer->red_mask_shift,
-        framebuffer->green_mask_size,
-        framebuffer->green_mask_shift,
-        framebuffer->blue_mask_size,
-        framebuffer->blue_mask_shift
+        (uint32_t*)framebuffer.address,
+        framebuffer.width,
+        framebuffer.height,
+        framebuffer.pitch,
+        framebuffer.redMaskSize,
+        framebuffer.redMaskShift,
+        framebuffer.greenMaskSize,
+        framebuffer.greenMaskShift,
+        framebuffer.blueMaskSize,
+        framebuffer.blueMaskShift
     );
 
 
@@ -95,15 +94,14 @@ extern "C" void kmain() {
     Hal::EnableSSE();
 #endif
 
-    uint64_t hhdm_offset = hhdm_request.response->offset;
-    Memory::HHDMBase = hhdm_offset;
+    Memory::HHDMBase = boot.hhdmBase;
 
-    if (memmap_request.response == nullptr) {
+    if (boot.memoryMap.regions == nullptr || boot.memoryMap.count == 0) {
         Panic("System memory map missing!", nullptr);
     }
 
     Kt::KernelLogStream(OK, "Mem") << "Creating PageFrameAllocator";
-    Memory::PageFrameAllocator pmm(Memory::Scan(memmap_request.response));
+    Memory::PageFrameAllocator pmm(Memory::Scan(boot.memoryMap));
     Memory::g_pfa = &pmm;
 
     Kt::KernelLogStream(OK, "Mem") << "Creating HeapAllocator";
@@ -118,7 +116,7 @@ extern "C" void kmain() {
 
     Memory::VMM::Paging g_paging{};
     Memory::VMM::g_paging = &g_paging;
-    g_paging.Init((uint64_t)&KernelStartSymbol, ((uint64_t)&KernelEndSymbol - (uint64_t)&KernelStartSymbol), memmap_request.response);
+    g_paging.Init((uint64_t)&KernelStartSymbol, ((uint64_t)&KernelEndSymbol - (uint64_t)&KernelStartSymbol), boot.memoryMap, framebuffer);
 
     // Reprogram PAT so entry 1 = Write-Combining (default is Write-Through).
     // Must be done after paging init and before any WC mappings.
@@ -137,7 +135,7 @@ extern "C" void kmain() {
     Graphics::Cursor::MapWriteCombining();
 #endif
 
-    Hal::ACPI g_acpi((Hal::ACPI::XSDP*)Memory::HHDM(rsdp_request.response->address));
+    Hal::ACPI g_acpi((Hal::ACPI::XSDP*)Memory::HHDM(boot.rsdpPhysical));
 
 #if defined (__x86_64__)
     if (g_acpi.GetXSDT() != nullptr) {
@@ -174,10 +172,13 @@ extern "C" void kmain() {
     }
 #endif
 
-    Efi::SystemTable* ST = (Efi::SystemTable*)Memory::HHDM(system_table_request.response->address);
-    Efi::Init(ST, efi_memmap_request.response);
+    // UEFI runtime services are optional (absent on legacy-BIOS boots).
+    if (boot.has(montauk::boot::FeatureEfiSystemTable)) {
+        Efi::SystemTable* ST = (Efi::SystemTable*)Memory::HHDM(boot.efi.systemTablePhysical);
+        Efi::Init(ST, boot.efi);
+    }
 
-    Fs::InitializeBootFilesystems(module_request.response);
+    Fs::InitializeBootFilesystems(boot.modules);
 
     // A Bluetooth adapter present at boot enumerates during the xHCI port scan,
     // before the ramdisk is mounted.  Now that drive 0 is up, finish any
@@ -191,7 +192,7 @@ extern "C" void kmain() {
     Ipc::Initialize();
 
     // Boot Application Processors (all subsystems ready, APs can schedule)
-    Smp::BootAPs();
+    Smp::BootAPs(boot.smp);
 
     // Flush any stale PS/2 mouse bytes that accumulated during boot
     // (edge-triggered IRQs can be lost while spinlocks disable interrupts)