| 1 | ; Project name : XTIDE Universal BIOS
|
|---|
| 2 | ; Description : Common functions for initializing different
|
|---|
| 3 | ; VLB and PCI IDE Controllers.
|
|---|
| 4 |
|
|---|
| 5 | ; Section containing code
|
|---|
| 6 | SECTION .text
|
|---|
| 7 |
|
|---|
| 8 | ;--------------------------------------------------------------------
|
|---|
| 9 | ; AdvAtaInit_DetectControllerForIdeBaseInBX
|
|---|
| 10 | ; Parameters:
|
|---|
| 11 | ; BX: IDE Controller base port
|
|---|
| 12 | ; Returns:
|
|---|
| 13 | ; AX: ID WORD specific for detected controller
|
|---|
| 14 | ; Zero if no controller detected
|
|---|
| 15 | ; DX: Controller base port (not IDE)
|
|---|
| 16 | ; CF: Set if controller detected
|
|---|
| 17 | ; Cleared if no controller
|
|---|
| 18 | ; Corrupts registers:
|
|---|
| 19 | ; BX
|
|---|
| 20 | ;--------------------------------------------------------------------
|
|---|
| 21 | AdvAtaInit_DetectControllerForIdeBaseInBX:
|
|---|
| 22 | call Vision_DetectAndReturnIDinAXandPortInDXifControllerPresent
|
|---|
| 23 | jne SHORT .NoAdvancedControllerForPortBX
|
|---|
| 24 | call Vision_DoesIdePortInBXbelongToControllerWithIDinAX
|
|---|
| 25 | jne SHORT .NoAdvancedControllerForPortBX
|
|---|
| 26 |
|
|---|
| 27 | stc ; Advanced Controller found for port BX
|
|---|
| 28 | ret
|
|---|
| 29 |
|
|---|
| 30 | .NoAdvancedControllerForPortBX:
|
|---|
| 31 | xor ax, ax
|
|---|
| 32 | ret
|
|---|
| 33 |
|
|---|
| 34 |
|
|---|
| 35 | ;--------------------------------------------------------------------
|
|---|
| 36 | ; AdvAtaInit_GetControllerMaxPioModeToAL
|
|---|
| 37 | ; Parameters:
|
|---|
| 38 | ; AX: ID WORD specific for detected controller
|
|---|
| 39 | ; Returns:
|
|---|
| 40 | ; AL: Max supported PIO mode
|
|---|
| 41 | ; AH: FLGH_DPT_IORDY if IORDY supported, zero otherwise
|
|---|
| 42 | ; CF: Set if PIO limit necessary
|
|---|
| 43 | ; Cleared if no need to limit timings
|
|---|
| 44 | ; Corrupts registers:
|
|---|
| 45 | ; (AX if CF cleared)
|
|---|
| 46 | ;--------------------------------------------------------------------
|
|---|
| 47 | AdvAtaInit_GetControllerMaxPioModeToAL equ Vision_GetMaxPioModeToAL
|
|---|
| 48 |
|
|---|
| 49 |
|
|---|
| 50 | ;--------------------------------------------------------------------
|
|---|
| 51 | ; AdvAtaInit_InitializeControllerForDPTinDSDI
|
|---|
| 52 | ; Parameters:
|
|---|
| 53 | ; DS:DI: Ptr to DPT for Single or Slave Drive
|
|---|
| 54 | ; Returns:
|
|---|
| 55 | ; CF: Cleared if success or no controller to initialize
|
|---|
| 56 | ; Set if error
|
|---|
| 57 | ; Corrupts registers:
|
|---|
| 58 | ; AX, BX, CX, DX
|
|---|
| 59 | ;--------------------------------------------------------------------
|
|---|
| 60 | AdvAtaInit_InitializeControllerForDPTinDSDI:
|
|---|
| 61 | push bp
|
|---|
| 62 | push si
|
|---|
| 63 |
|
|---|
| 64 | ; Call Controller Specific initialization function
|
|---|
| 65 | mov ax, [di+DPT_ADVANCED_ATA.wControllerID]
|
|---|
| 66 | test ax, ax
|
|---|
| 67 | jz SHORT .NoAdvancedController ; Return with CF cleared
|
|---|
| 68 |
|
|---|
| 69 | ; We only support Vision at the moment so no need to identify ID
|
|---|
| 70 | call AdvAtaInit_LoadMasterDPTtoDSSIifSlaveInDSDI
|
|---|
| 71 | call Vision_InitializeWithIDinAHandConfigInAL
|
|---|
| 72 |
|
|---|
| 73 | .NoAdvancedController:
|
|---|
| 74 | pop si
|
|---|
| 75 | pop bp
|
|---|
| 76 | ret
|
|---|
| 77 |
|
|---|
| 78 |
|
|---|
| 79 | ;--------------------------------------------------------------------
|
|---|
| 80 | ; AdvAtaInit_LoadMasterDPTtoDSSIifSlaveInDSDI
|
|---|
| 81 | ; Parameters:
|
|---|
| 82 | ; DS:DI: Ptr to DPT for Single or Slave Drive
|
|---|
| 83 | ; Returns:
|
|---|
| 84 | ; DS:DI: Ptr to DPT for Single or Slave Drive
|
|---|
| 85 | ; SI: Offset to Master DPT if Slave Drive present
|
|---|
| 86 | ; Zero if Slave Drive not present
|
|---|
| 87 | ; Corrupts registers:
|
|---|
| 88 | ; AX
|
|---|
| 89 | ;--------------------------------------------------------------------
|
|---|
| 90 | AdvAtaInit_LoadMasterDPTtoDSSIifSlaveInDSDI:
|
|---|
| 91 | ; Must be Slave Drive if previous DPT has same IDEVARS offset
|
|---|
| 92 | lea si, [di-LARGEST_DPT_SIZE] ; DS:SI points to previous DPT
|
|---|
| 93 | mov al, [di+DPT.bIdevarsOffset]
|
|---|
| 94 | cmp al, [si+DPT.bIdevarsOffset]
|
|---|
| 95 | je SHORT .MasterAndSlaveDrivePresent
|
|---|
| 96 |
|
|---|
| 97 | ; We only have single drive so zero SI
|
|---|
| 98 | xor si, si
|
|---|
| 99 | .MasterAndSlaveDrivePresent:
|
|---|
| 100 | ret
|
|---|
| 101 |
|
|---|
| 102 |
|
|---|
| 103 | ;--------------------------------------------------------------------
|
|---|
| 104 | ; AdvAtaInit_SelectSlowestCommonPioTimingsToBXandCXfromDSSIandDSDI
|
|---|
| 105 | ; Parameters:
|
|---|
| 106 | ; DS:DI: Ptr to DPT for Single or Slave Drive
|
|---|
| 107 | ; SI: Offset to Master DPT if Slave Drive present
|
|---|
| 108 | ; Zero if Slave Drive not present
|
|---|
| 109 | ; Returns:
|
|---|
| 110 | ; BX: Best common PIO mode
|
|---|
| 111 | ; CX: Slowest common PIO Cycle Time in nanosecs
|
|---|
| 112 | ; Corrupts registers:
|
|---|
| 113 | ; Nothing
|
|---|
| 114 | ;--------------------------------------------------------------------
|
|---|
| 115 | AdvAtaInit_SelectSlowestCommonPioTimingsToBXandCXfromDSSIandDSDI:
|
|---|
| 116 | eMOVZX bx, BYTE [di+DPT_ADVANCED_ATA.bPioMode]
|
|---|
| 117 | mov cx, [di+DPT_ADVANCED_ATA.wMinPioCycleTime]
|
|---|
| 118 | test si, si
|
|---|
| 119 | jz SHORT .PioTimingsLoadedToAXandCX
|
|---|
| 120 | MIN_U bl, [si+DPT_ADVANCED_ATA.bPioMode]
|
|---|
| 121 | MAX_U cx, [si+DPT_ADVANCED_ATA.wMinPioCycleTime]
|
|---|
| 122 | .PioTimingsLoadedToAXandCX:
|
|---|
| 123 | ret
|
|---|
