[3] | 1 | ; File name : AH0h_HReset.asm
|
---|
| 2 | ; Project name : IDE BIOS
|
---|
| 3 | ; Created date : 27.9.2007
|
---|
| 4 | ; Last update : 2.5.2010
|
---|
| 5 | ; Author : Tomi Tilli
|
---|
| 6 | ; Description : Int 13h function AH=0h, Disk Controller Reset.
|
---|
| 7 |
|
---|
| 8 | RETRIES_IF_RESET_FAILS EQU 3
|
---|
| 9 | TIMEOUT_BEFORE_RESET_RETRY EQU 5 ; System timer ticks
|
---|
| 10 |
|
---|
| 11 | ; Section containing code
|
---|
| 12 | SECTION .text
|
---|
| 13 |
|
---|
| 14 | ;--------------------------------------------------------------------
|
---|
| 15 | ; Int 13h function AH=0h, Disk Controller Reset.
|
---|
| 16 | ;
|
---|
| 17 | ; AH0h_HandlerForDiskControllerReset
|
---|
| 18 | ; Parameters:
|
---|
| 19 | ; AH: Bios function 0h
|
---|
| 20 | ; DL: Drive number (ignored so all drives are reset)
|
---|
| 21 | ; If bit 7 is set all hard disks and floppy disks reset.
|
---|
| 22 | ; Parameters loaded by Int13h_Jump:
|
---|
| 23 | ; DS: RAMVARS segment
|
---|
| 24 | ; Returns:
|
---|
| 25 | ; AH: Int 13h return status
|
---|
| 26 | ; CF: 0 if succesfull, 1 if error
|
---|
| 27 | ; IF: 1
|
---|
| 28 | ; Corrupts registers:
|
---|
| 29 | ; Flags
|
---|
| 30 | ;--------------------------------------------------------------------
|
---|
| 31 | ALIGN JUMP_ALIGN
|
---|
| 32 | AH0h_HandlerForDiskControllerReset:
|
---|
| 33 | push dx
|
---|
| 34 | push cx
|
---|
| 35 | push bx
|
---|
| 36 | push ax
|
---|
| 37 |
|
---|
| 38 | test dl, 80h ; Reset floppy drives only?
|
---|
| 39 | jz SHORT .ResetForeignControllers
|
---|
| 40 | call AH0h_ResetOurControllers
|
---|
| 41 | .ResetForeignControllers:
|
---|
| 42 | call AH0h_ResetFloppyAndForeignHardDiskControllers
|
---|
| 43 | jmp Int13h_PopXRegsAndReturn ; Return since error
|
---|
| 44 |
|
---|
| 45 |
|
---|
| 46 | ;--------------------------------------------------------------------
|
---|
| 47 | ; Resets all IDE controllers handled by this BIOS.
|
---|
| 48 | ;
|
---|
| 49 | ; AH0h_ResetOurControllers
|
---|
| 50 | ; Parameters:
|
---|
| 51 | ; DS: RAMVARS segment
|
---|
| 52 | ; Returns:
|
---|
| 53 | ; AH: Int 13h return status
|
---|
| 54 | ; CF: 0 if succesfull, 1 if error
|
---|
| 55 | ; Corrupts registers:
|
---|
| 56 | ; AL, BX, CX, DI
|
---|
| 57 | ;--------------------------------------------------------------------
|
---|
| 58 | ALIGN JUMP_ALIGN
|
---|
| 59 | AH0h_ResetOurControllers:
|
---|
| 60 | push dx
|
---|
| 61 | mov bx, ROMVARS.ideVars0 ; Load offset to first IDEVARS
|
---|
| 62 | call Initialize_GetIdeControllerCountToCX
|
---|
| 63 | ALIGN JUMP_ALIGN
|
---|
| 64 | .ResetLoop:
|
---|
| 65 | call AH0h_ResetIdevarsController
|
---|
| 66 | jc SHORT .Return
|
---|
| 67 | add bx, BYTE IDEVARS_size
|
---|
| 68 | loop .ResetLoop
|
---|
| 69 | xor ax, ax ; Clear AH and CF since no errors
|
---|
| 70 | .Return:
|
---|
| 71 | pop dx
|
---|
| 72 | ret
|
---|
| 73 |
|
---|
| 74 |
|
---|
| 75 | ;--------------------------------------------------------------------
|
---|
| 76 | ; Resets master and slave drive based on either drive number.
|
---|
| 77 | ;
|
---|
| 78 | ; AH0h_ResetIdevarsController
|
---|
| 79 | ; Parameters:
|
---|
| 80 | ; CS:BX: Ptr to IDEVARS
|
---|
| 81 | ; DS: RAMVARS segment
|
---|
| 82 | ; Returns:
|
---|
| 83 | ; AH: Int 13h return status
|
---|
| 84 | ; CF: 0 if succesfull, 1 if error
|
---|
| 85 | ; Corrupts registers:
|
---|
| 86 | ; AL, DX, DI
|
---|
| 87 | ;--------------------------------------------------------------------
|
---|
| 88 | ALIGN JUMP_ALIGN
|
---|
| 89 | AH0h_ResetIdevarsController:
|
---|
| 90 | mov dx, [cs:bx+IDEVARS.wPort]
|
---|
| 91 | call FindDPT_ForIdeMasterAtPort ; Find master drive to DL
|
---|
| 92 | jc SHORT AH0h_ResetMasterAndSlaveDriveWithRetries
|
---|
| 93 | call FindDPT_ForIdeSlaveAtPort ; Find slave if master not present
|
---|
| 94 | jc SHORT AH0h_ResetMasterAndSlaveDriveWithRetries
|
---|
| 95 | clc
|
---|
| 96 | ret
|
---|
| 97 |
|
---|
| 98 |
|
---|
| 99 | ;--------------------------------------------------------------------
|
---|
| 100 | ; Resets master and slave drive based on either drive number.
|
---|
| 101 | ;
|
---|
| 102 | ; AH0h_ResetMasterAndSlaveDriveWithRetries
|
---|
| 103 | ; Parameters:
|
---|
| 104 | ; DL: Drive number for master or slave drive
|
---|
| 105 | ; Returns:
|
---|
| 106 | ; AH: Int 13h return status
|
---|
| 107 | ; CF: 0 if succesfull, 1 if error
|
---|
| 108 | ; Corrupts registers:
|
---|
| 109 | ; AL, DX, DI
|
---|
| 110 | ;--------------------------------------------------------------------
|
---|
| 111 | ALIGN JUMP_ALIGN
|
---|
| 112 | AH0h_ResetMasterAndSlaveDriveWithRetries:
|
---|
| 113 | push cx
|
---|
| 114 | push bx
|
---|
| 115 | mov cx, RETRIES_IF_RESET_FAILS
|
---|
| 116 | ALIGN JUMP_ALIGN
|
---|
| 117 | .RetryLoop:
|
---|
| 118 | mov di, cx ; Backup counter
|
---|
| 119 | call AHDh_ResetDrive
|
---|
| 120 | jnc SHORT .Return
|
---|
| 121 | mov cx, TIMEOUT_BEFORE_RESET_RETRY
|
---|
| 122 | call SoftDelay_TimerTicks
|
---|
| 123 | mov cx, di
|
---|
| 124 | loop .RetryLoop
|
---|
| 125 | mov ah, RET_HD_RESETFAIL
|
---|
| 126 | stc
|
---|
| 127 | ALIGN JUMP_ALIGN
|
---|
| 128 | .Return:
|
---|
| 129 | pop bx
|
---|
| 130 | pop cx
|
---|
| 131 | ret
|
---|
| 132 |
|
---|
| 133 |
|
---|
| 134 | ;--------------------------------------------------------------------
|
---|
| 135 | ; Resets floppy drives and foreign hard disks.
|
---|
| 136 | ;
|
---|
| 137 | ; AH0h_ResetFloppyAndForeignHardDiskControllers
|
---|
| 138 | ; Parameters:
|
---|
| 139 | ; DL: Drive number (ignored so all drives are reset)
|
---|
| 140 | ; If bit 7 is set all hard disks and floppy disks reset.
|
---|
| 141 | ; Returns:
|
---|
| 142 | ; AH: Int 13h return status
|
---|
| 143 | ; CF: 0 if succesfull, 1 if error
|
---|
| 144 | ; Corrupts registers:
|
---|
| 145 | ; Nothing
|
---|
| 146 | ;--------------------------------------------------------------------
|
---|
| 147 | ALIGN JUMP_ALIGN
|
---|
| 148 | AH0h_ResetFloppyAndForeignHardDiskControllers:
|
---|
| 149 | xor ah, ah ; AH=0h, Disk Controller Reset
|
---|
| 150 | pushf ; Push flags to simulate INT
|
---|
| 151 | cli ; Disable interrupts
|
---|
| 152 | call FAR [RAMVARS.fpOldI13h]
|
---|
| 153 | ret
|
---|