build: CMake toolchain for Kernel

build: moved CMake toolchain for Bootloader from Source folder to root of Bootloader

Kernel/Source/entry.S

@@ -2,20 +2,58 @@
 .global _start
 
 _start:
-    add x1, x0, #64         // x1 = BIFramebuffer
-    ldr x2, [x1]            // x2 = base
-    ldr x3, [x1, #16]       // x3 = width
-    ldr x4, [x1, #24]       // x4 = height
+    add x1, x0, #64
+    ldr x2, [x1]            // base
+    ldr x3, [x1, #16]       // width
+    ldr x4, [x1, #24]       // height
     
     mul x5, x3, x4 
+    mov x7, #5
+    udiv x10, x5, x7        // stripe size
+
+    // 0x00RRGGBB
+    // lblue: 5B CE FA
+    mov w11, #0xCEFA
+    movk w11, #0x5B, lsl #16
     
-    mov w6, #0x00FF00
-    movk w6, #0x0000, lsl #16 
+    // pink: F5 A7 B8
+    mov w12, #0xA7B8
+    movk w12, #0xF5, lsl #16
+    
+    // white: FF FF FF
+    mov w13, #0xFFFF
+    movk w13, #0xFF, lsl #16
+
+    mov x14, #0             // pixels in curr stripe
+    mov x15, #0             // stripe index
 
 fill_loop:
     cbz x5, done
+
+    cmp x15, #0
+    b.eq set_blue
+    cmp x15, #1
+    b.eq set_pink
+    cmp x15, #2
+    b.eq set_white
+    cmp x15, #3
+    b.eq set_pink
+    b set_blue
+
+set_blue:  mov w6, w11; b draw
+set_pink:  mov w6, w12; b draw
+set_white: mov w6, w13
+
+draw:
     str w6, [x2], #4
     sub x5, x5, #1
+    add x14, x14, #1
+
+    cmp x14, x10
+    b.lt fill_loop
+    
+    mov x14, #0
+    add x15, x15, #1
     b fill_loop
 
 done: