Add proper Physical memory management to this branch

to ensure it doesn't get too out of date

We can now run the FAT command to demo reading out the FAT16 filesystem,
however this will cause the need for a reboot as after this command. We are FOR NOW
not able to put in any new commands

src/kernel/boot.s

@@ -0,0 +1,66 @@
+/*
+ * Multiboot 
+ */
+.set ALIGN,    1<<0             /* align loaded modules on page boundaries */
+.set MEMINFO,  1<<1             /* provide memory map */
+.set FLAGS,    ALIGN | MEMINFO  /* this is the Multiboot 'flag' field */
+.set MAGIC,    0x1BADB002       /* 'magic number' lets bootloader find the header */
+.set CHECKSUM, -(MAGIC + FLAGS) /* checksum of above, to prove we are multiboot */
+
+.section .multiboot
+.align 4
+.long MAGIC
+.long FLAGS
+.long CHECKSUM
+ 
+
+.section .bss
+.align 16
+stack_bottom:
+.skip 16384 # 16 KiB
+stack_top:
+ 
+.section .text
+.include "./src/kernel/gdt/gdt.s"
+.include "./src/kernel/irs_table.s"
+.include "./src/kernel/irq_table.s"
+.include "./src/kernel/idt/idt.s"
+.include "./src/kernel/memory/paging.s"
+
+
+.global _start
+.type _start, @function
+_start:
+	/*Setup the stack pointer to point to the beginning of our stack */
+	/* I believe its a high address growing down to lower adress for the stack on x86*/
+	mov $stack_top, %esp
+
+	/*Reset EFLAGS*/
+	pushl $0 
+	popf 
+
+	/* push the pointer to the Multiboot information structure*/
+	pushl %ebx
+
+	/* push the magic value */
+	pushl %eax
+	
+	call early_main
+
+
+	mov %cr0, %eax 
+	or $1, %eax
+	mov %eax, %cr0
+
+	
+	call kernel_main
+
+
+	cli
+1:	hlt
+	jmp 1b
+
+
+.size _start, . - _start
+
+