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section .text
init_paging:
   ;page table
   mov   ecx, 1024		;need to map 1024 pages to frames - 1024*1024*4 is 4194304 bytes!
   mov   edi, 0x9d000      ;address of the page table 4 kb right after pde
   mov   edx, 0b00000000000000000000000000000011             ;set attributes, 00000000 00000000 00000000 00000011 <- user1/kernel0, read0/write1 and present1, 
														
.loop1:
   mov   [edi], edx            ; attribut
   add   edi, 4              ;go to next memory location, 4 bytes next because the descriptor is 32 bits
   add   edx, 4096 			;go to next frame adress
   cmp ecx, 700				
   jz .mmio
   jmp .next
.mmio:
   mov edx,   0b11110010000000000001000000000001		;0xf200100 - physical MMIO adress, BAR @ 324*4096 - 0x144000, but dont works
.next:
   
   
   dec   ecx
   jnz   .loop1        ;looping tills we reach 0x9e000

   ;Page Directories
   mov   ecx, 1024			
   mov   edi, 0x9C000      ;address of the page directory 4 kb before pte
   mov   edx, 0             
.loop2:
   mov   [edi], edx           ;attribut
   add   edi, 4             ;go to next memory location
   dec   ecx
   jnz   .loop2 				;looping tills we reach 0x9d000
   
   mov ecx, 0
.loop3:
   mov ebx, 0x3

   mov dword [edx+ecx], 0x9d000
   add dword [edx+ecx], ebx
   add ebx, 0x4
   add ecx, 0x4
   cmp ecx, 1024 				;megabyte counter
   jne .loop3
   
   mov   cr3, edx
   mov   eax, cr0				;enable paging! 
   or    eax, 0x80000000
   mov   cr0, eax       
						
	
ret	

Code: Select all

section .bss
buffer: resb 8208
section .text

install_rtl8139:

	mov dx, word [pciio]	;pciio holds the I/O BAR @ 0xc100
	add dx, 0x52
	mov al, 0x0
	out dx, al
		
	mov dx, word [pciio]
	add dx, 0x40
	mov eax, 0x03000700
	out dx, eax
	
	mov dx, word [pciio]
	add dx, 0x44
	mov eax, 0xf
	out dx, eax
	
	mov dx, word [pciio]
	add dx, 0x37
	mov al, 0x10
	out dx, al
	
	mov dx, word [pciio]
	add dx, 0x37
	in eax, dx
	test eax, 0x10
	jnz .cont
.cont:
	mov dx, word [pciio]
	add dx, 0x30
	mov eax, dword [buffer]
	out dx, eax				;dword
	
	mov dx, word [pciio]
	add dx, 0x37
	mov al, (1<<3)
	out dx, al
		
	mov dx, word [pciio]
	add dx, 0x3c
	mov ax, 0xffff
	out dx, ax				;word
	
	mov dx, word [pciio]
	add dx, 0x37
	mov al, 0x0c
	out dx, al
		
ret


rtl_net_handle:
	
cli	
	pusha

    mov ax, 0x10
    mov ds, ax
    mov es, ax
    mov fs, ax
    mov gs, ax
                                         
	;mov eax,0x144000			;commented because it dont work ! trying to use MMIO 
	;lea ebx, [eax + 0x3e]
	;mov word [ebx], 0xffff
	
	mov dx, word [pciio]
	add dx, 0x3e			;status register
	mov ax, 0xffff
	out dx, ax		;reset the interupts!


	mov esi, irqtest
	call putstring

	mov al, 0x20
    mov dx, 0xA0
	out dx, al    ;clear the irq so we can get more interupts 


	mov al, 0x20	
	mov dx, 0x20
	out dx, al    ;clear the irq so we can get more interupts           
           
	popa
	sti	                                            
iret                                              
align 4


irqtest: db "Interupt test!", 0

Code: Select all

cmp ecx, 700				
   jz .mmio
   jmp .next
.mmio:
				  
	  mov edx, 0b11110010000000000001000000000000 ;0xf2001000 physical adress
	  or edx, 1
.calc:	
 	;  MMIO adress @ 325*4096 - 0x145000
   mov   [edi], edx            ; attribut
   add   edi, 4  
   add edx, 4096
   
   push edx
   xor edx, edx
	mov eax, ecx
		mov ebx, 1024
	div ebx
	mov ecx, edx
   pop edx  
   
   dec ecx
   cmp ecx, 0
   jz .calc
.next:	

Code: Select all

	mov eax,0x145000
	lea ebx, [eax + 0x3e]
	mov word [ebx], 0xffff