Make driver initialization easier in manager.asm

With this change, the driver's setup function only has to be added
to the 'driver_init_functions'-array and it will be called once
'setup_drivers' is called.

i386/loader/src-asm/drivers/manager.asm

@@ -26,13 +26,41 @@ setup_drivers:
     mov         [esi + (64 - 16)],      edx
     mov         [esi + (64 - 20)],      edi
 
+    ; [esi + 8]:    Pointer to the current driver init function
+    ; [esi + 12]L   Pointer to current driver slot
+    ; ecx:          Driver slot index
+
+    xor ecx, ecx
+
+.driver_setup_loop:
+    cmp         ecx,                    DRIVER_SLOT_COUNT
+    jae         .epilog
+
+    mov         ebx,                    ecx
+    shl         ebx,                    2
+    add         ebx,                    driver_init_functions
+    mov         eax,                    [ebx]
+    mov         [esi + 8],              eax
+
+    cmp         eax,                    0
+    je          .epilog
+
+    mov         eax,                    ecx
+    mov         edx,                    DRIVER_SLOT_SIZE
+    mul         edx
+    mov         [esi + 12],             eax
+
     push        ebp
     mov         ebp,                    esp
-    push        dword DRIVER_MEMORY_AREA
-    call        initialize_pci_driver
+    push        dword [esi + 12]
+    mov         eax,                    [esi + 8]
+    call        eax
     mov         esp,                    ebp
     pop         ebp
 
+    inc ecx
+    jmp .driver_setup_loop
+
 .epilog:
     mov         eax,                    [esi + (64 - 4)]
     mov         ebx,                    [esi + (64 - 8)]
@@ -45,3 +73,4 @@ setup_drivers:
     ret
 
 %include "drivers/pci/driver.asm"
+%include "drivers/acpi/driver.asm"

i386/loader/src-asm/entry.asm

@@ -46,9 +46,6 @@ stage_2_setup_entry:
     cli
     hlt
 
-some_text:
-    db "This is some text.", 0x00
-
 ; Utilities
 ; Memory Management
 %include "memory/a20.asm"
@@ -58,13 +55,18 @@ some_text:
 
 bits 32
 stage2_true_entry:
-    mov [dword 0xb8000], byte 'X'
-    mov [dword 0xb8000 + 1], byte 0x31
+    push ebp
+    mov ebp, esp
+    call setup_drivers
+    mov esp, ebp
+    pop ebp
+
     cli
     hlt
 
 %include "utility/math.asm"
 %include "utility/memory.asm"
+%include "utility/display.asm"
 
 ; Driver Manager
-; %include "drivers/manager.asm"
+ %include "drivers/manager.asm"