Add bootstrap source.

Made to manage holdover from Syncboot, but is half-finished because of
an issue with the prior mentioned header file.

kernel/bootstrap.c

@@ -0,0 +1,98 @@
+/************************
+ *** Team Kitty, 2019 ***
+ ***       Sync       ***
+ ***********************/
+
+/* This file contains all of the functions required to handle
+ * the system handover from Syncboot.
+ */
+
+#include <kernel.h>
+
+static void UpdateSegments(void);
+static void InstallInterrupt(size_t ISR, size_t Function);
+static void InstallTrap(size_t ISR, size_t Function);
+
+
+
+/* Main system handover from UEFI.
+ * Prepares the processor, the screen, and memory. */
+void PrepareSystem(FILELOADER_PARAMS* FLOP) {
+    Memory_Info.MemoryMap = FLOP->MemoryMap;
+    Memory_Info.MemoryMapSize = FLOP->MemoryMap_Size;
+    Memory_Info.MemoryMapDescriptorSize = FLOP->MemoryMapDescriptorSize;
+    Memory_Info.MemoryMapDescriptorVersion = FLOP->MemoryMapDescriptorVersion;
+
+    if(SetIdentityMap(FLOP->RTServices) == NULL) {
+        Memory_Info.MemoryMap = FLOP->MemoryMap;
+    }
+
+    SetupPrinting(FLOP->GPU_Info->GPUs[0]);
+    /* All print functions are now available. */
+
+    PrepareAVX();
+
+
+
+    /* Bit 5 of CR0 is Numeric Error, which enables
+     * the internal x87 Floating Point Math error
+     * reporting. */
+    size_t CR0 = ReadControlRegister(0);
+    // Mask CR0 to only see bit 5
+    if( !(CR0 & (1 << 5))) {
+        // Preserve CR0, but set bit 5.
+        size_t TempReg = CR0 ^ (1 << 5);
+        // Write it back
+        WriteControlRegister(0, TempReg);
+
+        // Double check. Some processors can be tricky.
+        TempReg = ReadControlRegister(CR0);
+        if(TempReg == CR0)
+            printf("Error setting CR0.NE\r\n");
+
+    }
+
+    /* Bit 10 of CR4 is OSXMMEXCPT, which enables
+     * SSE instructions. */
+    size_t CR4 = ReadControlRegister(4);
+    // Mask CR4 to only see bit 10
+    if( !(CR4 & (1 << 10))) {
+        // Preserve CR4, but set bit 10.
+        size_t TempReg = CR4 ^ (1 << 10);
+        // Write it back
+        WriteControlRegister(4, TempReg);
+
+        // Double check. Some processors can be tricky.
+        TempReg = ReadControlRegister(4);
+        if(TempReg == CR4)
+            printf("Error setting CR4.OSXMMEXCPT\r\n");
+    }
+
+    // Set up memory management
+    InstallGDT();
+    InstallIDT();
+    InstallMemoryMap();
+    InstallPaging();
+
+    // Clean up UEFI's mess
+    ReclaimEfiBootServicesMemory();
+    ReclaimEfiLoaderCodeMemory();
+
+    // Let Intel ME take over power management
+    PreparePowerManagement();
+
+}
+
+/* A temporary system for keeping track of system performance. */
+
+size_t ClockTick() {
+
+    // We will be reading a register, so we need to split it up.
+    size_t RegHigh = 0, RegLow = 0;
+    
+    __asm__ __volatile__("rdtscp" : "=a" (RegLow), "=d" (RegHigh) : : "%rcx");
+
+}
+
+
+