| [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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| [238] | 18 | IDEDEVICE%+Wait_IRQorDRQ: |
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| [150] | 19 | mov bx, TIMEOUT_AND_STATUS_TO_WAIT(TIMEOUT_DRQ, FLG_STATUS_DRQ) |
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| [238] | 20 | %ifdef ASSEMBLE_SHARED_IDE_DEVICE_FUNCTIONS ; JR-IDE/ISA does not support IRQ |
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| [150] | 21 | test BYTE [bp+IDEPACK.bDeviceControl], FLG_DEVCONTROL_nIEN |
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| [238] | 22 | jnz SHORT IDEDEVICE%+Wait_PollStatusFlagInBLwithTimeoutInBH ; Interrupt disabled |
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| 23 | %endif |
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| [150] | 24 | ; Fall to IdeWait_IRQorStatusFlagInBLwithTimeoutInBH |
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| 25 | |
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| 26 | |
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| 27 | ;-------------------------------------------------------------------- |
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| 28 | ; IdeWait_IRQorStatusFlagInBLwithTimeoutInBH |
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| 29 | ; Parameters: |
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| 30 | ; BH: Timeout ticks |
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| 31 | ; BL: IDE Status Register bit to wait |
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| 32 | ; DS:DI: Ptr to DPT (in RAMVARS segment) |
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| 33 | ; Returns: |
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| 34 | ; AH: INT 13h Error Code |
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| 35 | ; CF: Cleared if success, Set if error |
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| 36 | ; Corrupts registers: |
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| 37 | ; AL, BX, CX, DX |
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| 38 | ;-------------------------------------------------------------------- |
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| [238] | 39 | IDEDEVICE%+Wait_IRQorStatusFlagInBLwithTimeoutInBH: |
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| 40 | %ifdef ASSEMBLE_SHARED_IDE_DEVICE_FUNCTIONS ; JR-IDE/ISA does not support IRQ |
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| [150] | 41 | call IdeIrq_WaitForIRQ |
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| [238] | 42 | %endif |
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| [150] | 43 | ; Always fall to IdeWait_PollStatusFlagInBLwithTimeoutInBH for error processing |
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| 44 | |
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| 45 | |
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| 46 | ;-------------------------------------------------------------------- |
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| 47 | ; IdeWait_PollStatusFlagInBLwithTimeoutInBH |
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| 48 | ; Parameters: |
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| 49 | ; BH: Timeout ticks |
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| 50 | ; BL: IDE Status Register bit to poll |
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| 51 | ; DS:DI: Ptr to DPT (in RAMVARS segment) |
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| 52 | ; Returns: |
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| 53 | ; AH: INT 13h Error Code |
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| 54 | ; CF: Cleared if success, Set if error |
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| 55 | ; Corrupts registers: |
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| 56 | ; AL, BX, CX, DX |
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| 57 | ;-------------------------------------------------------------------- |
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| [238] | 58 | IDEDEVICE%+Wait_PollStatusFlagInBLwithTimeoutInBH: |
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| [150] | 59 | mov ah, bl |
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| [155] | 60 | mov cl, bh |
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| 61 | call Timer_InitializeTimeoutWithTicksInCL |
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| [150] | 62 | and ah, ~FLG_STATUS_BSY |
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| [238] | 63 | jz SHORT IDEDEVICE%+PollBsyOnly |
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| [150] | 64 | ; Fall to PollBsyAndFlgInAH |
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| 65 | |
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| 66 | ;-------------------------------------------------------------------- |
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| 67 | ; PollBsyAndFlgInAH |
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| 68 | ; Parameters: |
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| 69 | ; AH: Status Register Flag to poll (until set) when device not busy |
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| 70 | ; DS:DI: Ptr to DPT (in RAMVARS segment) |
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| 71 | ; Returns: |
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| 72 | ; AH: BIOS Error code |
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| 73 | ; CF: Clear if wait completed successfully (no errors) |
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| 74 | ; Set if any error |
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| 75 | ; Corrupts registers: |
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| 76 | ; AL, BX, CX, DX |
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| 77 | ;-------------------------------------------------------------------- |
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| [266] | 78 | IDEDEVICE%+PollBsyAndFlgInAH: |
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| 79 | INPUT_TO_AL_FROM_IDE_REGISTER STATUS_REGISTER_in ; Discard contents for first read |
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| [150] | 80 | ALIGN JUMP_ALIGN |
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| 81 | .PollLoop: |
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| [266] | 82 | INPUT_TO_AL_FROM_IDE_REGISTER STATUS_REGISTER_in |
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| [150] | 83 | test al, FLG_STATUS_BSY ; Controller busy? |
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| 84 | jnz SHORT .UpdateTimeout ; If so, jump to timeout update |
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| 85 | test al, ah ; Test secondary flag |
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| [238] | 86 | jnz SHORT IDEDEVICE%+Error_GetBiosErrorCodeToAHfromPolledStatusRegisterInAL |
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| [150] | 87 | .UpdateTimeout: |
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| [155] | 88 | call Timer_SetCFifTimeout |
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| [150] | 89 | jnc SHORT .PollLoop ; Loop if time left |
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| [238] | 90 | call IDEDEVICE%+Error_GetBiosErrorCodeToAHfromPolledStatusRegisterInAL |
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| [150] | 91 | jc SHORT .ReturnErrorCodeInAH |
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| 92 | mov ah, RET_HD_TIMEOUT ; Expected bit never got set |
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| 93 | stc |
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| 94 | .ReturnErrorCodeInAH: |
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| 95 | ret |
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| 96 | |
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| 97 | |
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| 98 | ;-------------------------------------------------------------------- |
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| 99 | ; PollBsyOnly |
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| 100 | ; Parameters: |
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| 101 | ; DS:DI: Ptr to DPT (in RAMVARS segment) |
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| 102 | ; Returns: |
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| 103 | ; AH: BIOS Error code |
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| 104 | ; CF: Clear if wait completed successfully (no errors) |
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| 105 | ; Set if any error |
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| 106 | ; Corrupts registers: |
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| 107 | ; AL, BX, CX, DX |
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| 108 | ;-------------------------------------------------------------------- |
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| [238] | 109 | IDEDEVICE%+PollBsyOnly: |
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| [266] | 110 | INPUT_TO_AL_FROM_IDE_REGISTER STATUS_REGISTER_in ; Discard contents for first read |
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| [150] | 111 | ALIGN JUMP_ALIGN |
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| 112 | .PollLoop: |
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| [266] | 113 | INPUT_TO_AL_FROM_IDE_REGISTER STATUS_REGISTER_in |
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| [150] | 114 | test al, FLG_STATUS_BSY ; Controller busy? |
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| [238] | 115 | jz SHORT IDEDEVICE%+Error_GetBiosErrorCodeToAHfromPolledStatusRegisterInAL |
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| [155] | 116 | call Timer_SetCFifTimeout ; Update timeout counter |
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| [150] | 117 | jnc SHORT .PollLoop ; Loop if time left (sets CF on timeout) |
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| [238] | 118 | jmp SHORT IDEDEVICE%+Error_GetBiosErrorCodeToAHfromPolledStatusRegisterInAL |
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