| [150] | 1 | ; Project name : XTIDE Universal BIOS
|
|---|
| 2 | ; Description : IDE Device wait functions.
|
|---|
| 3 |
|
|---|
| 4 | ; Section containing code
|
|---|
| 5 | SECTION .text
|
|---|
| 6 |
|
|---|
| 7 | ;--------------------------------------------------------------------
|
|---|
| 8 | ; IdeWait_IRQorDRQ
|
|---|
| 9 | ; Parameters:
|
|---|
| 10 | ; DS:DI: Ptr to DPT (in RAMVARS segment)
|
|---|
| 11 | ; SS:BP: Ptr to IDEPACK or PIOVARS
|
|---|
| 12 | ; Returns:
|
|---|
| 13 | ; AH: INT 13h Error Code
|
|---|
| 14 | ; CF: Cleared if success, Set if error
|
|---|
| 15 | ; Corrupts registers:
|
|---|
| 16 | ; AL, BX, CX, DX
|
|---|
| 17 | ;--------------------------------------------------------------------
|
|---|
| [238] | 18 | IDEDEVICE%+Wait_IRQorDRQ:
|
|---|
| [150] | 19 | mov bx, TIMEOUT_AND_STATUS_TO_WAIT(TIMEOUT_DRQ, FLG_STATUS_DRQ)
|
|---|
| [238] | 20 | %ifdef ASSEMBLE_SHARED_IDE_DEVICE_FUNCTIONS ; JR-IDE/ISA does not support IRQ
|
|---|
| [150] | 21 | test BYTE [bp+IDEPACK.bDeviceControl], FLG_DEVCONTROL_nIEN
|
|---|
| [238] | 22 | jnz SHORT IDEDEVICE%+Wait_PollStatusFlagInBLwithTimeoutInBH ; Interrupt disabled
|
|---|
| 23 | %endif
|
|---|
| [150] | 24 | ; Fall to IdeWait_IRQorStatusFlagInBLwithTimeoutInBH
|
|---|
| 25 |
|
|---|
| 26 |
|
|---|
| 27 | ;--------------------------------------------------------------------
|
|---|
| 28 | ; IdeWait_IRQorStatusFlagInBLwithTimeoutInBH
|
|---|
| 29 | ; Parameters:
|
|---|
| 30 | ; BH: Timeout ticks
|
|---|
| 31 | ; BL: IDE Status Register bit to wait
|
|---|
| 32 | ; DS:DI: Ptr to DPT (in RAMVARS segment)
|
|---|
| 33 | ; Returns:
|
|---|
| 34 | ; AH: INT 13h Error Code
|
|---|
| 35 | ; CF: Cleared if success, Set if error
|
|---|
| 36 | ; Corrupts registers:
|
|---|
| 37 | ; AL, BX, CX, DX
|
|---|
| 38 | ;--------------------------------------------------------------------
|
|---|
| [238] | 39 | IDEDEVICE%+Wait_IRQorStatusFlagInBLwithTimeoutInBH:
|
|---|
| 40 | %ifdef ASSEMBLE_SHARED_IDE_DEVICE_FUNCTIONS ; JR-IDE/ISA does not support IRQ
|
|---|
| [150] | 41 | call IdeIrq_WaitForIRQ
|
|---|
| [238] | 42 | %endif
|
|---|
| [150] | 43 | ; Always fall to IdeWait_PollStatusFlagInBLwithTimeoutInBH for error processing
|
|---|
| 44 |
|
|---|
| 45 |
|
|---|
| 46 | ;--------------------------------------------------------------------
|
|---|
| 47 | ; IdeWait_PollStatusFlagInBLwithTimeoutInBH
|
|---|
| 48 | ; Parameters:
|
|---|
| 49 | ; BH: Timeout ticks
|
|---|
| 50 | ; BL: IDE Status Register bit to poll
|
|---|
| 51 | ; DS:DI: Ptr to DPT (in RAMVARS segment)
|
|---|
| 52 | ; Returns:
|
|---|
| 53 | ; AH: INT 13h Error Code
|
|---|
| 54 | ; CF: Cleared if success, Set if error
|
|---|
| 55 | ; Corrupts registers:
|
|---|
| 56 | ; AL, BX, CX, DX
|
|---|
| 57 | ;--------------------------------------------------------------------
|
|---|
| [238] | 58 | IDEDEVICE%+Wait_PollStatusFlagInBLwithTimeoutInBH:
|
|---|
| [150] | 59 | mov ah, bl
|
|---|
| [155] | 60 | mov cl, bh
|
|---|
| 61 | call Timer_InitializeTimeoutWithTicksInCL
|
|---|
| [150] | 62 | and ah, ~FLG_STATUS_BSY
|
|---|
| [238] | 63 | jz SHORT IDEDEVICE%+PollBsyOnly
|
|---|
| [150] | 64 | ; Fall to PollBsyAndFlgInAH
|
|---|
| 65 |
|
|---|
| 66 | ;--------------------------------------------------------------------
|
|---|
| 67 | ; PollBsyAndFlgInAH
|
|---|
| 68 | ; Parameters:
|
|---|
| 69 | ; AH: Status Register Flag to poll (until set) when device not busy
|
|---|
| 70 | ; DS:DI: Ptr to DPT (in RAMVARS segment)
|
|---|
| 71 | ; Returns:
|
|---|
| 72 | ; AH: BIOS Error code
|
|---|
| 73 | ; CF: Clear if wait completed successfully (no errors)
|
|---|
| 74 | ; Set if any error
|
|---|
| 75 | ; Corrupts registers:
|
|---|
| 76 | ; AL, BX, CX, DX
|
|---|
| 77 | ;--------------------------------------------------------------------
|
|---|
| [238] | 78 | %ifdef ASSEMBLE_SHARED_IDE_DEVICE_FUNCTIONS
|
|---|
| [150] | 79 | PollBsyAndFlgInAH:
|
|---|
| [238] | 80 | call IDEDEVICE%+ReadIdeStatusRegisterToAL; Discard contents for first read
|
|---|
| [150] | 81 | ALIGN JUMP_ALIGN
|
|---|
| 82 | .PollLoop:
|
|---|
| [238] | 83 | call IDEDEVICE%+ReadIdeStatusRegisterToAL
|
|---|
| [150] | 84 | test al, FLG_STATUS_BSY ; Controller busy?
|
|---|
| 85 | jnz SHORT .UpdateTimeout ; If so, jump to timeout update
|
|---|
| 86 | test al, ah ; Test secondary flag
|
|---|
| [238] | 87 | jnz SHORT IDEDEVICE%+Error_GetBiosErrorCodeToAHfromPolledStatusRegisterInAL
|
|---|
| [150] | 88 | .UpdateTimeout:
|
|---|
| [155] | 89 | call Timer_SetCFifTimeout
|
|---|
| [150] | 90 | jnc SHORT .PollLoop ; Loop if time left
|
|---|
| [238] | 91 | call IDEDEVICE%+Error_GetBiosErrorCodeToAHfromPolledStatusRegisterInAL
|
|---|
| [150] | 92 | jc SHORT .ReturnErrorCodeInAH
|
|---|
| 93 | mov ah, RET_HD_TIMEOUT ; Expected bit never got set
|
|---|
| 94 | stc
|
|---|
| 95 | .ReturnErrorCodeInAH:
|
|---|
| 96 | ret
|
|---|
| [238] | 97 | %endif
|
|---|
| [150] | 98 |
|
|---|
| 99 |
|
|---|
| 100 | ;--------------------------------------------------------------------
|
|---|
| 101 | ; PollBsyOnly
|
|---|
| 102 | ; Parameters:
|
|---|
| 103 | ; DS:DI: Ptr to DPT (in RAMVARS segment)
|
|---|
| 104 | ; Returns:
|
|---|
| 105 | ; AH: BIOS Error code
|
|---|
| 106 | ; CF: Clear if wait completed successfully (no errors)
|
|---|
| 107 | ; Set if any error
|
|---|
| 108 | ; Corrupts registers:
|
|---|
| 109 | ; AL, BX, CX, DX
|
|---|
| 110 | ;--------------------------------------------------------------------
|
|---|
| [238] | 111 | IDEDEVICE%+PollBsyOnly:
|
|---|
| 112 | call IDEDEVICE%+ReadIdeStatusRegisterToAL; Discard contents for first read
|
|---|
| [150] | 113 | ALIGN JUMP_ALIGN
|
|---|
| 114 | .PollLoop:
|
|---|
| [238] | 115 | call IDEDEVICE%+ReadIdeStatusRegisterToAL
|
|---|
| [150] | 116 | test al, FLG_STATUS_BSY ; Controller busy?
|
|---|
| [238] | 117 | jz SHORT IDEDEVICE%+Error_GetBiosErrorCodeToAHfromPolledStatusRegisterInAL
|
|---|
| [155] | 118 | call Timer_SetCFifTimeout ; Update timeout counter
|
|---|
| [150] | 119 | jnc SHORT .PollLoop ; Loop if time left (sets CF on timeout)
|
|---|
| [238] | 120 | jmp SHORT IDEDEVICE%+Error_GetBiosErrorCodeToAHfromPolledStatusRegisterInAL
|
|---|
| [150] | 121 |
|
|---|
| 122 |
|
|---|
| 123 | ;--------------------------------------------------------------------
|
|---|
| 124 | ; ReadIdeStatusRegisterToAL
|
|---|
| 125 | ; Parameters:
|
|---|
| 126 | ; DS:DI: Ptr to DPT (in RAMVARS segment)
|
|---|
| 127 | ; Returns:
|
|---|
| 128 | ; AL: IDE Status Register contents
|
|---|
| 129 | ; Corrupts registers:
|
|---|
| 130 | ; BX, DX
|
|---|
| 131 | ;--------------------------------------------------------------------
|
|---|
| 132 | ALIGN JUMP_ALIGN
|
|---|
| [238] | 133 | IDEDEVICE%+ReadIdeStatusRegisterToAL:
|
|---|
| 134 | JUMP_TO_INPUT_TO_AL_FROM_IDE_REGISTER STATUS_REGISTER_in
|
|---|
