ATA reading stuff '-'

boot/loader.asm

@@ -264,7 +264,7 @@ main32:
 Init            db  "Booting OS/K !", 0x0D, 0x0A, 0x0D, 0x0A, 0x09, " Checking CPUID...",0
 CPUIDD          db  0x09, " Checking CPUID...", 0
 EnA20           db  0x09, " Enabling A20 line...", 0
-KernSearch      db  0x09, " Loading the Kernel in RAM...", 0
+ReadAttempt     db  0x09, " Attempt to read a sector with ATA commands...", 0x0A, 0x0D, 0x0A, 0x0D,0
 txt             db  0x09, " Switching to Long Mode... ", 0
 Reinit          db  "Booting OS/K !", 0x0D, 0x0A, 0x0D, 0x0A, 0
 Pass            db  " OK", 0x0A, 0x0D, 0
@@ -337,6 +337,18 @@ main64:
     mov esi, msg
     call write
     
+    mov bl, 0x0F
+    mov esi, ReadAttempt
+    call write
+    
+    mov rcx, 2
+.looping:
+    nop
+    nop
+    nop
+    loop .looping                           ; Temporized because the ATA drive must be ready
+        
+    call ata_read
     
     jmp Die
     

boot/loader64.inc

@@ -71,6 +71,129 @@ write:
     pop rax
     jmp .pLoop
 .scroll:
-    ; XXX ;
+    ; XXX I don't think I'll implement this, but never know...;
     jmp .pLoop
+    
+dump:
+;-----------------------------------------------------------------------;
+; x64/LM Dump Printing Functions                                        ;
+; bl  : color code                                                      ;
+; esi : string address                                                  ;
+;-----------------------------------------------------------------------;
+    mov  edi, [NextTRAM]                     ; TRAM ADDRESS
+    push rsi
+    push rdi
+    push rcx
+    mov rcx, 512
+.pLoop:
+    lodsb                   
+    stosb                                   ; text subpixel
+    mov al, bl
+    stosb                                   ; color subpixel
+    add qword [NextTRAM], 0x2               ; Cursor moving
+    add qword [VGA_X], 0x2                  ; coord + 2 because 2 subpixels
+    loop .pLoop
+    pop rcx
+    pop rdi
+    pop rsi    
+    ret
 
+ata_read:
+;-----------------------------------------------------------------------;
+; x64/LM ATA Reading function                                           ;
+;                                                                       ;
+;                                                                       ;
+;-----------------------------------------------------------------------;
+
+;  Technical infos about the ports (Intel Doc):
+;
+;       Port   Access Mode  Misc
+;
+;       1f0       r/w       Data register, the bytes of the disk itself
+;       1f1       r         Error register that can be handled
+;       1f2       r/w       Sector count, how many sectors to read
+;       1f3       r/w       Sector number, the actual sector wanted
+;       1f4       r/w       Cylinder low, cylinders is 0-1024
+;       1f5       r/w       Cylinder high, this makes up the rest of the 1024
+;       1f6       r/w       Drive/head
+;                              bit 7 = 1
+;                              bit 6 = 0
+;                              bit 5 = 1
+;                              bit 4 = 0  drive 0 select
+;                                    = 1  drive 1 select
+;                              bit 3-0    head select bits
+;       1f7       r         Status register
+;                              bit 7 = 1  controller is executing a command
+;                              bit 6 = 1  drive is ready
+;                              bit 5 = 1  write fault
+;                              bit 4 = 1  seek complete
+;                              bit 3 = 1  sector buffer requires servicing
+;                              bit 2 = 1  disk data read corrected
+;                              bit 1 = 1  index - set to 1 each revolution
+;                              bit 0 = 1  previous command ended in an error
+;       1f7       w         Command register
+;                            commands:
+;                              50h format track
+;                              20h read sectors with retry
+;                              21h read sectors without retry
+;                              22h read long with retry
+;                              23h read long without retry
+;                              30h write sectors with retry
+;                              31h write sectors without retry
+;                              32h write long with retry
+;                              33h write long without retry
+;
+
+   push rax
+   push rbx
+   push rdx
+   push rcx
+   push rdi
+   mov     dx,1f6h         ;Drive and head port
+   mov     al,0a0h         ;Drive 0, head 0
+   out     dx,al
+
+   mov     dx,1f2h         ;Sector count port
+   mov     al,1            ;Read one sector
+   out     dx,al
+
+   mov     dx,1f3h         ;Sector number port
+   mov     al,1            ;Read sector one
+   out     dx,al
+
+   mov     dx,1f4h         ;Cylinder low port
+   mov     al,0            ;Cylinder 0
+   out     dx,al
+
+   mov     dx,1f5h         ;Cylinder high port
+   mov     al,0            ;The rest of the cylinder 0
+   out     dx,al
+
+   mov     dx,1f7h         ;Command port
+   mov     al,20h          ;Read with retry.
+   out     dx,al
+still_going:
+   in      al,dx
+   test    al,8            ;This means the sector buffer requires
+            ;servicing.
+   jz      still_going     ;Don't continue until the sector buffer
+            ;is ready.
+
+   mov     cx,512/2        ;One sector /2
+   mov     rdi,buffer
+   mov     dx,1f0h         ;Data port - data comes in and out of here.
+   rep     insw
+   pop rdi
+   pop rcx
+   pop rdx
+   pop rbx
+   pop rax
+   mov bl, 0x0F
+   mov esi, buffer
+   call dump
+   mov bl, 0x0A
+   mov esi, end
+   call write
+   ret
+   buffer:  times 512 db "_"
+   end:     db "[End of Sector]", 0x0