예제 #1
0
        // Bootstrap is a class designed only to get the essentials done.
        // ie the stuff needed to "pre boot". Do only the very minimal here.
        // IDT, PIC, and Float
        // Note: This is changing a bit GDT (already) and IDT are moving to a real preboot area.
        /// <summary>
        /// Init the boot strap. Invoke pre-boot methods.
        /// </summary>
        public static void Init()
        {
            // Drag this stuff in to the compiler manually until we add the always include attrib
            Multiboot2.Init();
            INTs.Dummy();

            PIC = new PIC();
            CPU.UpdateIDT(true);

            /* TODO check using CPUID that SSE2 is supported */
            CPU.InitSSE();

            /*
             * We liked to use SSE for all floating point operation and end to mix SSE / x87 in Cosmos code
             * but sadly in x86 this resulte impossible as Intel not implemented some needed instruction (for example conversion
             * for long to double) so - in some rare cases - x87 continue to be used. I hope passing to the x32 or x64 IA will solve
             * definively this problem.
             */
            CPU.InitFloat();
        }