[363] | 1 | ; Project name : XTIDE Universal BIOS |
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| 2 | ; Description : Common functions for initializing different |
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| 3 | ; VLB and PCI IDE Controllers. |
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| 4 | |
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| 5 | ; Section containing code |
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| 6 | SECTION .text |
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| 7 | |
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| 8 | ;-------------------------------------------------------------------- |
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[364] | 9 | ; AdvAtaInit_DetectControllerForIdeBaseInBX |
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[363] | 10 | ; Parameters: |
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[364] | 11 | ; BX: IDE Controller base port |
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[363] | 12 | ; Returns: |
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| 13 | ; AX: ID WORD specific for detected controller |
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| 14 | ; Zero if no controller detected |
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[364] | 15 | ; DX: Controller base port (not IDE) |
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[363] | 16 | ; CF: Set if controller detected |
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| 17 | ; Cleared if no controller |
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| 18 | ; Corrupts registers: |
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| 19 | ; BX |
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| 20 | ;-------------------------------------------------------------------- |
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[364] | 21 | AdvAtaInit_DetectControllerForIdeBaseInBX: |
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| 22 | call Vision_DetectAndReturnIDinAXandPortInDXifControllerPresent |
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| 23 | jne SHORT .NoAdvancedControllerForPortBX |
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| 24 | call Vision_DoesIdePortInBXbelongToControllerWithIDinAX |
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| 25 | jne SHORT .NoAdvancedControllerForPortBX |
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[363] | 26 | |
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[364] | 27 | stc ; Advanced Controller found for port BX |
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[363] | 28 | ret |
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| 29 | |
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[364] | 30 | .NoAdvancedControllerForPortBX: |
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[363] | 31 | xor ax, ax |
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| 32 | ret |
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| 33 | |
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| 34 | |
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| 35 | ;-------------------------------------------------------------------- |
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| 36 | ; AdvAtaInit_GetControllerMaxPioModeToAL |
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| 37 | ; Parameters: |
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| 38 | ; AX: ID WORD specific for detected controller |
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| 39 | ; Returns: |
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[364] | 40 | ; AL: Max supported PIO mode |
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| 41 | ; AH: FLGH_DPT_IORDY if IORDY supported, zero otherwise |
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[363] | 42 | ; CF: Set if PIO limit necessary |
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| 43 | ; Cleared if no need to limit timings |
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| 44 | ; Corrupts registers: |
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[364] | 45 | ; (AX if CF cleared) |
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[363] | 46 | ;-------------------------------------------------------------------- |
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| 47 | AdvAtaInit_GetControllerMaxPioModeToAL equ Vision_GetMaxPioModeToAL |
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| 48 | |
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| 49 | |
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| 50 | ;-------------------------------------------------------------------- |
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| 51 | ; AdvAtaInit_InitializeControllerForDPTinDSDI |
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| 52 | ; Parameters: |
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| 53 | ; DS:DI: Ptr to DPT for Single or Slave Drive |
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| 54 | ; Returns: |
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| 55 | ; CF: Cleared if success or no controller to initialize |
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| 56 | ; Set if error |
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| 57 | ; Corrupts registers: |
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| 58 | ; AX, BX, CX, DX |
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| 59 | ;-------------------------------------------------------------------- |
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| 60 | AdvAtaInit_InitializeControllerForDPTinDSDI: |
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[364] | 61 | push bp |
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[363] | 62 | push si |
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| 63 | |
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| 64 | ; Call Controller Specific initialization function |
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[364] | 65 | mov ax, [di+DPT_ADVANCED_ATA.wControllerID] |
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[363] | 66 | test ax, ax |
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[364] | 67 | jz SHORT .NoAdvancedController ; Return with CF cleared |
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[363] | 68 | |
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[364] | 69 | ; We only support Vision at the moment so no need to identify ID |
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| 70 | call AdvAtaInit_LoadMasterDPTtoDSSIifSlaveInDSDI |
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| 71 | call Vision_InitializeWithIDinAHandConfigInAL |
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| 72 | |
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[363] | 73 | .NoAdvancedController: |
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| 74 | pop si |
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[364] | 75 | pop bp |
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[363] | 76 | ret |
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| 77 | |
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| 78 | |
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| 79 | ;-------------------------------------------------------------------- |
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[364] | 80 | ; AdvAtaInit_LoadMasterDPTtoDSSIifSlaveInDSDI |
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[363] | 81 | ; Parameters: |
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| 82 | ; DS:DI: Ptr to DPT for Single or Slave Drive |
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| 83 | ; Returns: |
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[364] | 84 | ; DS:DI: Ptr to DPT for Single or Slave Drive |
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| 85 | ; SI: Offset to Master DPT if Slave Drive present |
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[363] | 86 | ; Zero if Slave Drive not present |
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| 87 | ; Corrupts registers: |
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[364] | 88 | ; AX |
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[363] | 89 | ;-------------------------------------------------------------------- |
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[364] | 90 | AdvAtaInit_LoadMasterDPTtoDSSIifSlaveInDSDI: |
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| 91 | ; Must be Slave Drive if previous DPT has same IDEVARS offset |
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| 92 | lea si, [di-LARGEST_DPT_SIZE] ; DS:SI points to previous DPT |
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| 93 | mov al, [di+DPT.bIdevarsOffset] |
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| 94 | cmp al, [si+DPT.bIdevarsOffset] |
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| 95 | je SHORT .MasterAndSlaveDrivePresent |
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[363] | 96 | |
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[364] | 97 | ; We only have single drive so zero SI |
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| 98 | xor si, si |
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| 99 | .MasterAndSlaveDrivePresent: |
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[363] | 100 | ret |
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| 101 | |
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| 102 | |
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| 103 | ;-------------------------------------------------------------------- |
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[364] | 104 | ; AdvAtaInit_SelectSlowestCommonPioTimingsToBXandCXfromDSSIandDSDI |
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[363] | 105 | ; Parameters: |
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[364] | 106 | ; DS:DI: Ptr to DPT for Single or Slave Drive |
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| 107 | ; SI: Offset to Master DPT if Slave Drive present |
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[363] | 108 | ; Zero if Slave Drive not present |
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| 109 | ; Returns: |
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[364] | 110 | ; BX: Best common PIO mode |
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| 111 | ; CX: Slowest common PIO Cycle Time in nanosecs |
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[363] | 112 | ; Corrupts registers: |
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| 113 | ; Nothing |
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| 114 | ;-------------------------------------------------------------------- |
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[364] | 115 | AdvAtaInit_SelectSlowestCommonPioTimingsToBXandCXfromDSSIandDSDI: |
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[370] | 116 | eMOVZX bx, [di+DPT_ADVANCED_ATA.bPioMode] |
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[364] | 117 | mov cx, [di+DPT_ADVANCED_ATA.wMinPioCycleTime] |
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| 118 | test si, si |
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| 119 | jz SHORT .PioTimingsLoadedToAXandCX |
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| 120 | MIN_U bl, [si+DPT_ADVANCED_ATA.bPioMode] |
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| 121 | MAX_U cx, [si+DPT_ADVANCED_ATA.wMinPioCycleTime] |
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| 122 | .PioTimingsLoadedToAXandCX: |
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[363] | 123 | ret |
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