Merge pull request #27 from kushagra765/0.06

Fixed VGA and Keyboard Driver

build.sh

@@ -9,11 +9,11 @@ sudo apt-get install nasm mtools
 export PATH="./toolchain/compiler/bin:$PATH"
 
 # Compile the OS
-i686-elf-as ./kernel/arch/i386/boot.S -o boot.o
+nasm -f elf32 ./kernel/arch/i386/boot.asm -o boot.o
 i686-elf-gcc -I./kernel/include/ -c ./kernel/drivers/vga/vga.c -o vga.o
 i686-elf-gcc -I./kernel/include/ -c ./kernel/drivers/ports/ports.c -o ports.o
 i686-elf-gcc -I./kernel/include/ -I./kernel/drivers/ -I./kernel/cpu/ -c ./kernel/drivers/keyboard/keyboard.c -o keyboard.o
-i686-elf-gcc -I./kernel/drivers/ -I./kernel/include/ -I./kernel/cpu/ -c ./init/init.c -o init.o
+i686-elf-gcc -I./kernel/drivers/ -I./kernel/include/ -I./kernel/cpu/ -c ./init/main.c -o init.o
 nasm -f elf32 ./kernel/cpu/load_gdt.asm -o load_gdt.o
 i686-elf-gcc -I./kernel/include/ -c ./kernel/cpu/gdt.c -o gdt.o
 nasm -f elf32 ./kernel/cpu/load_idt.asm -o load_idt.o

init/main.c

@@ -8,7 +8,7 @@
 void kernel_main() {
     /* Initialize the Terminal */
      terminal_initialize();
-     writestr("Welcome to PlatypusOS!");
+     writestr("Welcome to PlatypusOS!\n");
 
     /* Load GDT, IDT, ISR and IRQ */
      init_gdt();
@@ -18,4 +18,6 @@ void kernel_main() {
 
     /* Load Drivers */
      init_keyboard();
+
+    __asm__ volatile("sti");
 }

kernel/arch/i386/boot.asm

@@ -0,0 +1,36 @@
+[BITS 32]
+
+global start
+start:
+      mov esp, sys_stack
+      jmp stublet
+
+ALIGN 4
+multiboot:
+
+    PAGE_ALIGN   equ 1<<0
+    MEMORY_INFO  equ 1<<0
+    KLUDGE_AOUT  equ 1<<16
+    MAGIC        equ 0x1BADB002
+    FLAGS        equ PAGE_ALIGN | MEMORY_INFO | KLUDGE_AOUT
+    CHECKSUM     equ -(MAGIC + FLAGS)
+
+    EXTERN code, bss, end
+    dd MAGIC
+    dd FLAGS
+    dd CHECKSUM
+    
+    dd multiboot
+    dd code
+    dd bss
+    dd end
+    dd start
+
+stublet:
+     extern kernel_main
+     call kernel_main
+     jmp $
+
+SECTION .bss
+    resb 8192            
+sys_stack:

kernel/arch/i386/linker.ld

@@ -1,32 +1,30 @@
-ENTRY(_start)
+ENTRY(start)
+
+memory_address = 0x00100000;
 
 SECTIONS
 {
-	. = 1M;
-
-	.text BLOCK(4K) : ALIGN(4K)
-	{
-		*(.multiboot)
-		*(.text)
-	}
-
-
-	.rodata BLOCK(4K) : ALIGN(4K)
-	{
-		*(.rodata)
-	}
-
-
-	.data BLOCK(4K) : ALIGN(4K)
-	{
-		*(.data)
-	}
-
+  .text memory_address : AT(memory_address) {
+    code = .;
+    *(.text)
+    *(.rodata)
+    . = ALIGN(4096);
+  }
+
+  .data : AT(memory_address + (data - code))
+  {
+    data = .;
+    *(.data)
+    . = ALIGN(4096);
+  }
+
+  .bss : AT(memory_address + (bss - code))
+  {
+    bss = .;
+    *(.bss)
+    . = ALIGN(4096);
+  }
+
+  end = .;
 
-	.bss BLOCK(4K) : ALIGN(4K)
-	{
-		*(COMMON)
-		*(.bss)
-	}
-
 }

kernel/drivers/keyboard/keyboard.c

@@ -5,14 +5,43 @@
 #include <vga/vga.h>
 
 uint8_t keyboard_layout[128] = {
-    0,   27,   '1',  '2', '3',  '4', '5', '6', '7', '8', '9', '0', '-',
-    '=', '\b', '\t', 'q', 'w',  'e', 'r', 't', 'y', 'u', 'i', 'o', 'p',
-    '[', ']',  '\n', 0,   'a',  's', 'd', 'f', 'g', 'h', 'j', 'k', 'l',
-    ';', '\'', '`',  0,   '\\', 'z', 'x', 'c', 'v', 'b', 'n', 'm', ',',
-    '.', '/',  0,    '*', 0,    ' ', 0,   0,   0,   0,   0,   0,   0,
-    0,   0,    0,    0,   0,    0,   0,   0,   0,   '-', 0,   0,   0,
-    '+', 0,    0,    0,   0,    0,   0,   0,   0,   0,   0,   0,
-};
+    0,  27, '1', '2', '3', '4', '5', '6', '7', '8',
+  '9', '0', '-', '=', '\b',
+  '\t',			
+  'q', 'w', 'e', 'r',	
+  't', 'y', 'u', 'i', 'o', 'p', '[', ']', '\n',
+    0,			
+  'a', 's', 'd', 'f', 'g', 'h', 'j', 'k', 'l', ';',	
+ '\'', '`',   0,		
+ '\\', 'z', 'x', 'c', 'v', 'b', 'n',			
+  'm', ',', '.', '/',   0,				
+  '*',
+    0,	
+  ' ',	
+    0,	
+    0,	
+    0,   0,   0,   0,   0,   0,   0,   0,
+    0,	
+    0,	
+    0,	
+    0,	
+    0,	
+    0,	
+  '-',
+    0,	
+    0,
+    0,	
+  '+',
+    0,	
+    0,	
+    0,	
+    0,	
+    0,
+    0,   0,   0,
+    0,	
+    0,	
+    0,	
+};		
 
 void handler_keyboard() {
   uint8_t keyboard_key_scancode;
@@ -23,8 +52,7 @@ void handler_keyboard() {
     // Shift, Ctrl keys to be implemented
 
   } else {
-    char input = keyboard_layout[keyboard_key_scancode];
-    terminal_putchar(input);
+    putch(keyboard_layout[keyboard_key_scancode]);
   }
 }