Separated functionality into separate files. Added initial (untested) support for ARM.

arch/arm-none-eabi/boot.s

@@ -0,0 +1,33 @@
+.section ".text.boot"
+
+.globl Start
+Start:
+	// Setup the stack
+	mov	sp, #0x8000
+	
+	// Clear out bss
+	ldr	r4, =_bss_start
+	ldr	r9, =_bss_end
+	mov	r5, #0
+	mov	r6, #0
+	mov	r7, #0
+	mov	r8, #0
+	b	2f
+
+1:
+	// Store multiple at r4
+	stmia	r4!, {r5-r8}
+
+2:
+	// If we are still below bss_end, loop
+	cmp	r4, r9
+	blo	1b
+	
+	// Call brados_main
+	ldr	r3, =brados_main
+	blx	r3
+
+halt:
+	// Halt
+	wfe
+	b	halt