| [150] | 1 | ; Project name : XTIDE Universal BIOS |
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| 2 | ; Description : IDE Device wait functions. |
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| 3 | |
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| 4 | ; Section containing code |
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| 5 | SECTION .text |
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| 6 | |
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| 7 | ;-------------------------------------------------------------------- |
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| 8 | ; IdeWait_IRQorDRQ |
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| 9 | ; Parameters: |
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| 10 | ; DS:DI: Ptr to DPT (in RAMVARS segment) |
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| 11 | ; SS:BP: Ptr to IDEPACK or PIOVARS |
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| 12 | ; Returns: |
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| 13 | ; AH: INT 13h Error Code |
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| 14 | ; CF: Cleared if success, Set if error |
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| 15 | ; Corrupts registers: |
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| 16 | ; AL, BX, CX, DX |
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| 17 | ;-------------------------------------------------------------------- |
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| 18 | IdeWait_IRQorDRQ: |
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| 19 | mov bx, TIMEOUT_AND_STATUS_TO_WAIT(TIMEOUT_DRQ, FLG_STATUS_DRQ) |
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| 20 | test BYTE [bp+IDEPACK.bDeviceControl], FLG_DEVCONTROL_nIEN |
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| 21 | jnz SHORT IdeWait_PollStatusFlagInBLwithTimeoutInBH ; Interrupt disabled |
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| 22 | ; Fall to IdeWait_IRQorStatusFlagInBLwithTimeoutInBH |
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| 23 | |
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| 24 | |
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| 25 | ;-------------------------------------------------------------------- |
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| 26 | ; IdeWait_IRQorStatusFlagInBLwithTimeoutInBH |
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| 27 | ; Parameters: |
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| 28 | ; BH: Timeout ticks |
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| 29 | ; BL: IDE Status Register bit to wait |
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| 30 | ; DS:DI: Ptr to DPT (in RAMVARS segment) |
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| 31 | ; Returns: |
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| 32 | ; AH: INT 13h Error Code |
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| 33 | ; CF: Cleared if success, Set if error |
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| 34 | ; Corrupts registers: |
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| 35 | ; AL, BX, CX, DX |
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| 36 | ;-------------------------------------------------------------------- |
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| 37 | IdeWait_IRQorStatusFlagInBLwithTimeoutInBH: |
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| 38 | call IdeIrq_WaitForIRQ |
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| 39 | ; Always fall to IdeWait_PollStatusFlagInBLwithTimeoutInBH for error processing |
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| 40 | |
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| 41 | |
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| 42 | ;-------------------------------------------------------------------- |
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| 43 | ; IdeWait_PollStatusFlagInBLwithTimeoutInBH |
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| 44 | ; Parameters: |
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| 45 | ; BH: Timeout ticks |
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| 46 | ; BL: IDE Status Register bit to poll |
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| 47 | ; DS:DI: Ptr to DPT (in RAMVARS segment) |
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| 48 | ; Returns: |
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| 49 | ; AH: INT 13h Error Code |
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| 50 | ; CF: Cleared if success, Set if error |
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| 51 | ; Corrupts registers: |
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| 52 | ; AL, BX, CX, DX |
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| 53 | ;-------------------------------------------------------------------- |
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| 54 | IdeWait_PollStatusFlagInBLwithTimeoutInBH: |
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| 55 | mov ah, bl |
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| [155] | 56 | mov cl, bh |
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| 57 | call Timer_InitializeTimeoutWithTicksInCL |
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| [150] | 58 | and ah, ~FLG_STATUS_BSY |
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| 59 | jz SHORT PollBsyOnly |
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| 60 | ; Fall to PollBsyAndFlgInAH |
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| 61 | |
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| 62 | ;-------------------------------------------------------------------- |
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| 63 | ; PollBsyAndFlgInAH |
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| 64 | ; Parameters: |
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| 65 | ; AH: Status Register Flag to poll (until set) when device not busy |
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| 66 | ; DS:DI: Ptr to DPT (in RAMVARS segment) |
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| 67 | ; Returns: |
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| 68 | ; AH: BIOS Error code |
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| 69 | ; CF: Clear if wait completed successfully (no errors) |
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| 70 | ; Set if any error |
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| 71 | ; Corrupts registers: |
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| 72 | ; AL, BX, CX, DX |
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| 73 | ;-------------------------------------------------------------------- |
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| 74 | PollBsyAndFlgInAH: |
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| 75 | call ReadIdeStatusRegisterToAL ; Discard contents for first read |
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| 76 | ALIGN JUMP_ALIGN |
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| 77 | .PollLoop: |
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| 78 | call ReadIdeStatusRegisterToAL |
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| 79 | test al, FLG_STATUS_BSY ; Controller busy? |
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| 80 | jnz SHORT .UpdateTimeout ; If so, jump to timeout update |
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| 81 | test al, ah ; Test secondary flag |
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| 82 | jnz SHORT IdeError_GetBiosErrorCodeToAHfromPolledStatusRegisterInAL |
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| 83 | .UpdateTimeout: |
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| [155] | 84 | call Timer_SetCFifTimeout |
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| [150] | 85 | jnc SHORT .PollLoop ; Loop if time left |
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| 86 | call IdeError_GetBiosErrorCodeToAHfromPolledStatusRegisterInAL |
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| 87 | jc SHORT .ReturnErrorCodeInAH |
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| 88 | mov ah, RET_HD_TIMEOUT ; Expected bit never got set |
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| 89 | stc |
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| 90 | .ReturnErrorCodeInAH: |
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| 91 | ret |
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| 92 | |
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| 93 | |
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| 94 | ;-------------------------------------------------------------------- |
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| 95 | ; PollBsyOnly |
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| 96 | ; Parameters: |
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| 97 | ; DS:DI: Ptr to DPT (in RAMVARS segment) |
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| 98 | ; Returns: |
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| 99 | ; AH: BIOS Error code |
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| 100 | ; CF: Clear if wait completed successfully (no errors) |
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| 101 | ; Set if any error |
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| 102 | ; Corrupts registers: |
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| 103 | ; AL, BX, CX, DX |
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| 104 | ;-------------------------------------------------------------------- |
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| 105 | PollBsyOnly: |
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| 106 | call ReadIdeStatusRegisterToAL ; Discard contents for first read |
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| 107 | ALIGN JUMP_ALIGN |
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| 108 | .PollLoop: |
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| 109 | call ReadIdeStatusRegisterToAL |
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| 110 | test al, FLG_STATUS_BSY ; Controller busy? |
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| 111 | jz SHORT IdeError_GetBiosErrorCodeToAHfromPolledStatusRegisterInAL |
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| [155] | 112 | call Timer_SetCFifTimeout ; Update timeout counter |
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| [150] | 113 | jnc SHORT .PollLoop ; Loop if time left (sets CF on timeout) |
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| 114 | jmp SHORT IdeError_GetBiosErrorCodeToAHfromPolledStatusRegisterInAL |
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| 115 | |
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| 116 | |
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| 117 | ;-------------------------------------------------------------------- |
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| 118 | ; ReadIdeStatusRegisterToAL |
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| 119 | ; Parameters: |
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| 120 | ; DS:DI: Ptr to DPT (in RAMVARS segment) |
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| 121 | ; Returns: |
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| 122 | ; AL: IDE Status Register contents |
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| 123 | ; Corrupts registers: |
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| 124 | ; BX, DX |
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| 125 | ;-------------------------------------------------------------------- |
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| 126 | ALIGN JUMP_ALIGN |
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| 127 | ReadIdeStatusRegisterToAL: |
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| 128 | mov dl, STATUS_REGISTER_in |
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| [160] | 129 | jmp IdeIO_InputToALfromIdeRegisterInDL |
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