stuff

kernel/include/log/Address.h

@@ -0,0 +1,10 @@
+#pragma once
+#include "log/Log.h"
+#include "std/stdio.h"
+#include <stdint.h>
+
+// clang-format off
+
+#define kinfoptr(pointer) char result##pointer[40 + sizeof(#pointer)]; snprintf(result##pointer, sizeof result##pointer, "%s points to 0x%zx\n", #pointer, (uint64_t)pointer); kinfo(result##pointer)
+
+// clang-format on

kernel/include/memory/KernelMemoryManager.h

@@ -6,6 +6,9 @@ namespace KernelMemoryManager
     void* get_mapping(void* physicalAddress);
     void release_mapping(void* mapping);
 
+    void* get_unaligned_mapping(void* physicalAddress);
+    void release_unaligned_mapping(void* mapping);
+
     void* get_page();
     void* get_pages(uint64_t count);
 

kernel/src/acpi/RSDT.cpp

@@ -1,5 +1,7 @@
 #include "acpi/RSDT.h"
 #include "bootboot.h"
+#include "log/Address.h"
+#include "memory/KernelMemoryManager.h"
 #include "std/stdio.h"
 #include "std/string.h"
 
@@ -24,7 +26,9 @@ void* ACPI::FindTable(ACPI::SDTHeader* rootSDT, const char* signature)
             uint32_t entry = ((RSDT*)rootSDT)->PointerToOtherSDT[i];
             h = (SDTHeader*)(uint64_t)entry;
         }
+        SDTHeader* realHeader = (SDTHeader*)KernelMemoryManager::get_unaligned_mapping(h);
         if (strncmp(h->Signature, signature, 4) == 0) return (void*)h;
+        KernelMemoryManager::release_unaligned_mapping(realHeader);
     }
 
     return NULL;

kernel/src/main.cpp

@@ -11,6 +11,7 @@
 #include "interrupts/Interrupts.h"
 #include "io/PIC.h"
 #include "io/Serial.h"
+#include "log/Address.h"
 #include "log/Log.h"
 #include "memory/KernelHeap.h"
 #include "memory/KernelMemoryManager.h"
@@ -76,7 +77,7 @@ extern "C" void _start()
     kinfoln("Interrupts enabled");
 
     Debug::DebugStatus::the()->StartBootStage(Color{0x33, 0x33, 0x00, 0xFF});
-    ACPI::SDTHeader* rootSDT = ACPI::GetRSDTOrXSDT();
+    ACPI::SDTHeader* rootSDT = (ACPI::SDTHeader*)KernelMemoryManager::get_unaligned_mapping(ACPI::GetRSDTOrXSDT());
     bool isXSDT = false;
     if (strncmp(rootSDT->Signature, "XSDT", 4) != 0)
     {
@@ -130,8 +131,17 @@ extern "C" void _start()
         }
     }
 
-    sleep(2500);
-    shutdown();
+    ACPI::SDTHeader* madt = (ACPI::SDTHeader*)ACPI::FindTable(rootSDT, "APIC");
+    if (!madt)
+    {
+        kerrorln("MADT not found");
+        while (1) halt();
+    }
+
+    KernelMemoryManager::release_unaligned_mapping(rootSDT);
+
+    /*sleep(2500);
+    shutdown();*/
 
     while (1) halt();
 loop:

kernel/src/memory/KernelMemoryManager.cpp

@@ -11,6 +11,20 @@ void* KernelMemoryManager::get_mapping(void* physicalAddress)
     return (void*)virtualAddress;
 }
 
+void* KernelMemoryManager::get_unaligned_mapping(void* physicalAddress)
+{
+    uint64_t offset = (uint64_t)physicalAddress % 4096;
+    uint64_t virtualAddress = KernelHeap::request_virtual_page();
+    kernelVMM.map(virtualAddress, (uint64_t)physicalAddress - offset);
+    return (void*)(virtualAddress + offset);
+}
+
+void KernelMemoryManager::release_unaligned_mapping(void* mapping)
+{
+    uint64_t offset = (uint64_t)mapping % 4096;
+    kernelVMM.unmap((uint64_t)mapping - offset);
+}
+
 void KernelMemoryManager::release_mapping(void* mapping)
 {
     kernelVMM.unmap((uint64_t)mapping);

tools/debug.sh

@@ -5,4 +5,4 @@ source $(dirname $0)/env.sh
 
 tools/build-iso.sh
 
-qemu-system-x86_64 -cdrom Luna.iso -smp 1 -m 256M -serial stdio -d int,cpu_reset -s -no-reboot
+qemu-system-x86_64 -cdrom Luna.iso -smp 1 -m 256M -serial stdio -d int,cpu_reset -s -no-reboot $@

tools/rebuild-and-run.sh

@@ -5,4 +5,4 @@ source $(dirname $0)/env.sh
 
 tools/rebuild-iso.sh
 
-qemu-system-x86_64 -cdrom Luna.iso -smp 1 -m 256M -serial stdio -enable-kvm
+qemu-system-x86_64 -cdrom Luna.iso -smp 1 -m 256M -serial stdio -enable-kvm $@

tools/run.sh

@@ -5,4 +5,4 @@ source $(dirname $0)/env.sh
 
 tools/build-iso.sh
 
-qemu-system-x86_64 -cdrom Luna.iso -smp 1 -m 256M -serial stdio -enable-kvm
+qemu-system-x86_64 -cdrom Luna.iso -smp 1 -m 256M -serial stdio -enable-kvm $@