Changeset 582 in xtideuniversalbios for trunk/XTIDE_Universal_BIOS/Src/Initialization

Timestamp:

Mar 17, 2015, 1:14:17 PM (10 years ago)

Author:

krille_n_@…

google:author:

krille_n_@hotmail.com

Message:

Changes:

• Size optimizations to the QD Vision code.

Location:

trunk/XTIDE_Universal_BIOS/Src/Initialization/AdvancedAta

Files:

• AdvAtaInit.asm (modified) (1 diff)
• Vision.asm (modified) (4 diffs)

trunk/XTIDE_Universal_BIOS/Src/Initialization/AdvancedAta/AdvAtaInit.asm

@@ -56 +56 @@
 ;       AL:     Max supported PIO mode
 ;       AH:     FLGH_DPT_IORDY if IORDY supported, zero otherwise
-;       BX:     Min PIO cycle time (only if CF set)
-;       CF:     Set if PIO limit necessary
+;       BX:     Min PIO cycle time (only if ZF set)
+;       ZF:     Set if PIO limit necessary
 ;               Cleared if no need to limit timings
 ;   Corrupts registers:
-;       (AX if CF cleared)
+;       Nothing
 ;--------------------------------------------------------------------
 AdvAtaInit_GetControllerMaxPioModeToALandMinPioCycleTimeToBX    equ Vision_GetMaxPioModeToALandMinCycleTimeToBX

trunk/XTIDE_Universal_BIOS/Src/Initialization/AdvancedAta/Vision.asm

@@ -102 +102 @@
     ; Check if Secondary IDE channel is enabled
     push    ax
+    push    dx
     add     dx, BYTE QD6580_CONTROL_REGISTER
     in      al, dx
-    sub     dx, BYTE QD6580_CONTROL_REGISTER
     test    al, FLG_QDCONTROL_SECONDARY_DISABLED_in
+    pop     dx
     pop     ax
     jz      SHORT .CompareBXtoSecondaryIDE
@@ -131 +132 @@
 ;       AL:     Max supported PIO mode
 ;       AH:     FLGH_DPT_IORDY if IORDY supported, zero otherwise
-;       BX:     Min PIO Cycle Time (only if CF set)
-;       CF:     Set if PIO limit necessary
+;       BX:     Min PIO Cycle Time (only if ZF set)
+;       ZF:     Set if PIO limit necessary
 ;               Cleared if no need to limit timings
-;   Corrupts registers:
-;       (AX if CF cleared)
 ;   Corrupts registers:
 ;       Nothing
@@ -141 +140 @@
 Vision_GetMaxPioModeToALandMinCycleTimeToBX:
     cmp     ah, ID_QD6500 << 4
-    clc
     jne     SHORT .NoNeedToLimitForQD6580
 
     mov     ax, 2   ; Limit to PIO 2 because QD6500 does not support IORDY
     mov     bx, PIO_2_MIN_CYCLE_TIME_NS
-    stc
 .NoNeedToLimitForQD6580:
     ret
@@ -167 +164 @@
 Vision_InitializeWithIDinAHandConfigInAL:
     ; QD6580 has a Control Register that needs to be programmed
+    cmp     ah, ID_QD6500 << 4
     mov     dx, [di+DPT_ADVANCED_ATA.wControllerBasePort]
-    cmp     ah, ID_QD6500 << 4
-    je      SHORT .CalculateTimingForQD6500
+    mov     bp, QD6500_MAX_ACTIVE_TIME_CLOCKS | (QD6500_MIN_ACTIVE_TIME_CLOCKS << 8)    ; Assume QD6500
+    je      SHORT .CalculateTimingsForQD65xx
+    mov     bp, QD6580_MAX_ACTIVE_TIME_CLOCKS | (QD6580_MIN_ACTIVE_TIME_CLOCKS << 8)    ; It's a QD6580
 
     ; Program QD6580 Control Register (not available on QD6500) to
     ; Enable or Disable Read-Ahead and Post-Write Buffer to match
     ; jumper setting on the multi I/O card.
-    xor     ax, ax
     add     dx, BYTE QD6580_CONTROL_REGISTER
-    in      al, dx                                  ; Read to get ATAPI jumper status
+    in      al, dx                      ; Read to get ATAPI jumper status
     test    al, FLG_QDCONTROL_HDONLY_in
-    eCMOVNZ ah, FLG_QDCONTROL_NONATAPI              ; Enable Read-Ahead and Post-Write Buffers
-    mov     al, ah
-    or      al, MASK_QDCONTROL_FLAGS_TO_SET
+    mov     al, MASK_QDCONTROL_FLAGS_TO_SET
+    eCMOVNZ al, FLG_QDCONTROL_NONATAPI | MASK_QDCONTROL_FLAGS_TO_SET    ; Enable Read-Ahead and Post-Write Buffers
     out     dx, al
-    sub     dx, BYTE QD6580_CONTROL_REGISTER
+    dec     dx                          ; Secondary Channel IDE Timing Register
 
     ; Now we need to determine is the drive connected to the Primary or Secondary channel.
     ; QD6500 has only one channel that can be Primary at 1F0h or Secondary at 170h.
     ; QD6580 always has Primary channel at 1F0h. Secondary channel at 170h can be Enabled or Disabled.
-    cmp     WORD [di+DPT.wBasePort], DEVICE_ATA_PRIMARY_PORT
-    je      SHORT .CalculateTimingTicksForQD6580    ; Primary Channel so no need to modify DX
-    times 2 inc dx                                  ; Secondary Channel IDE Timing Register
-
-    ; QD6500 and QD6580 require slightly different calculations.
-.CalculateTimingTicksForQD6580:
-    mov     bp, QD6580_MAX_ACTIVE_TIME_CLOCKS | (QD6580_MIN_ACTIVE_TIME_CLOCKS << 8)
-    jmp     SHORT .CalculateTimingsForQD65xx
-
-.CalculateTimingForQD6500:
-    mov     bp, QD6500_MAX_ACTIVE_TIME_CLOCKS | (QD6500_MIN_ACTIVE_TIME_CLOCKS << 8)
+    cmp     BYTE [di+DPT.wBasePort], DEVICE_ATA_SECONDARY_PORT & 0FFh
+    je      SHORT .CalculateTimingsForQD65xx        ; Secondary Channel so no need to modify DX
+    dec     dx
+    dec     dx                          ; Primary Channel IDE Timing Register
 
     ; We need the PIO Cycle Time in CX to calculate Active and Recovery Times.