Merge pull request #16 from os-k-team/loader

Correcting a bug with ata driver

boot/loader/cpu/cpu.asm

@@ -20,3 +20,12 @@ temporize:
     loop .looping
     pop rcx
     ret
+
+bitemporize:
+    push rcx
+    mov rcx, 2000
+.looping:
+    call temporize
+    loop .looping
+    pop rcx
+    ret

boot/loader/io/ata.asm

@@ -34,7 +34,7 @@
 ;; GLOBAL DATA
 
 Bootdrv         db  0
-end             db "[End of Sector]", 0x0
+end             db "[End of Sector]", 0x0A, 0x0D, 0x0
 buffer:         times 513 db "_"
 
 ;; TEXT
@@ -42,8 +42,8 @@ buffer:         times 513 db "_"
 ata_read:
 ;-----------------------------------------------------------------------;
 ; x64/LM ATA Reading function                                           ;
-;                                                                       ;
+; bl : number of sectors to read  XXX                                   ;
-;                                                                       ;
+; bh : the first sector to read                                         ;
 ;-----------------------------------------------------------------------;
 
 ;  Technical infos about the ports (Intel Doc):
@@ -84,22 +84,21 @@ ata_read:
 ;                              32h write long with retry
 ;                              33h write long without retry
 ;
-
     push rax
     push rbx
-    push rdx
     push rcx
+    push rdx
     push rdi
     mov dx, 0x1f6                            ; Drive and head port
     mov al, 0x0a0                            ; Drive 0, head 0
     out dx,al
 
     mov dx, 0x1f2                            ; Sector count port
-    mov al, 1                                ; Read one sector
+    mov al, bl                               ; Read bl(s) sector
     out dx, al
 
     mov dx, 0x1f3                            ; Sector number port
-    mov al, 1                                ; Read sector one
+    mov al, bh                                ; Read from sector n°bh
     out dx, al
 
     mov dx, 0x1f4                            ; Cylinder low port
@@ -121,18 +120,18 @@ still_going:
                                                 ;is ready.
 
     mov cx, 512/2                            ; One sector /2 because it copies words
-    mov rdi, buffer
+    mov rdi, QWORD buffer
     mov dx, 0x1f0                            ; 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
+    pop rdx
+    pop rcx
+    pop rbx
+    pop rax
     ret

boot/loader/io/rmterm.asm

@@ -40,7 +40,7 @@ PrintB:
 ;---------------------------------------------------;
 ; Print out a simple string.                        ;
 ;                                                   ;
-; Expects: DS:SI = String to print                  ;
+; DS:SI = String to print                           ;
 ;                                                   ;
 ; Returns: None                                     ;
 ;                                                   ;

boot/loader/loader.asm

@@ -224,8 +224,13 @@ main64:
     call write
 
     call temporize                           ; Temporized because the ATA drive must be ready
+
+    mov bl, 1
+    mov bh, 1
     call ata_read
 
+    call bitemporize                           ; Temporized because the ATA drive must be ready
+
     jmp Die
 
     ; times 1024 nop