[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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| 9 | ; AdvAtaInit_DetectControllerForIdeBaseInDX |
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| 10 | ; Parameters: |
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| 11 | ; DX: IDE Controller base port |
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| 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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| 15 | ; CX: Controller base port (not IDE) |
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| 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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| 21 | AdvAtaInit_DetectControllerForIdeBaseInDX: |
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| 22 | call Vision_DetectAndReturnIDinAXandPortInCXifControllerPresent |
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| 23 | jne SHORT .NoAdvancedControllerForPortDX |
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| 24 | call Vision_DoesIdePortInDXbelongToControllerWithIDinAX |
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| 25 | jne SHORT .NoAdvancedControllerForPortDX |
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| 26 | |
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| 27 | stc ; Advanced Controller found for port DX |
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| 28 | ret |
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| 29 | |
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| 30 | .NoAdvancedControllerForPortDX: |
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| 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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| 40 | ; AL: Max supported PIO mode (if CF set) |
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| 41 | ; CF: Set if PIO limit necessary |
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| 42 | ; Cleared if no need to limit timings |
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| 43 | ; Corrupts registers: |
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| 44 | ; Nothing |
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| 45 | ;-------------------------------------------------------------------- |
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| 46 | AdvAtaInit_GetControllerMaxPioModeToAL equ Vision_GetMaxPioModeToAL |
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| 47 | |
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| 48 | |
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| 49 | ;-------------------------------------------------------------------- |
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| 50 | ; AdvAtaInit_InitializeControllerForDPTinDSDI |
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| 51 | ; Parameters: |
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| 52 | ; DS:DI: Ptr to DPT for Single or Slave Drive |
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| 53 | ; Returns: |
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| 54 | ; CF: Cleared if success or no controller to initialize |
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| 55 | ; Set if error |
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| 56 | ; Corrupts registers: |
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| 57 | ; AX, BX, CX, DX |
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| 58 | ;-------------------------------------------------------------------- |
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| 59 | AdvAtaInit_InitializeControllerForDPTinDSDI: |
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| 60 | push ds |
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| 61 | push si |
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| 62 | push di |
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| 63 | |
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| 64 | ; PIO and Advanced Controller variables are stored to BOOTMENUINFO |
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| 65 | ; to keep the DPTs as small as possible. |
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| 66 | call GetMasterAndSlaveBootMenuInfosToSIandDI |
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| 67 | cmp WORD [BOOTVARS.wMagicWord], BOOTVARS_MAGIC_WORD |
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| 68 | clc |
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| 69 | jne SHORT .BootMenuInfosAreNoLongerAvailable |
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| 70 | |
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| 71 | ; Call Controller Specific initialization function |
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| 72 | mov ax, [si+BOOTMENUINFO.wControllerID] |
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| 73 | test ax, ax |
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| 74 | jz SHORT .NoAdvancedController |
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| 75 | call Vision_InitializeWithIDinAHandConfigInAL ; The only we support at the moment |
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| 76 | |
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| 77 | .BootMenuInfosAreNoLongerAvailable: |
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| 78 | .NoAdvancedController: |
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| 79 | pop di |
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| 80 | pop si |
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| 81 | pop ds |
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| 82 | ret |
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| 83 | |
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| 84 | |
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| 85 | ;-------------------------------------------------------------------- |
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| 86 | ; AdvAtaInit_GetMasterAndSlaveBootMenuInfosToSIandDI |
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| 87 | ; Parameters: |
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| 88 | ; DS:DI: Ptr to DPT for Single or Slave Drive |
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| 89 | ; Returns: |
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| 90 | ; DS:SI: Ptr to Single or Master Drive BOOTMENUINFO |
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| 91 | ; DI: Offset to Slave Drive BOOTMENUINFO |
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| 92 | ; Zero if Slave Drive not present |
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| 93 | ; Corrupts registers: |
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| 94 | ; BX, DX, (DS will change!) |
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| 95 | ;-------------------------------------------------------------------- |
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| 96 | GetMasterAndSlaveBootMenuInfosToSIandDI: |
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| 97 | call BootMenuInfo_ConvertDPTtoBX |
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| 98 | LOAD_BDA_SEGMENT_TO ds, di, ! ; Zero DI to assume no Slave Drive present |
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| 99 | |
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| 100 | mov dx, [bx+BOOTMENUINFO.wIdeBasePort] ; Load IDE Port from Single or Slave Drive |
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| 101 | lea si, [bx+BOOTMENUINFO_size] ; SI points to Slave Drive if present |
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| 102 | cmp dx, [si+BOOTMENUINFO.wIdeBasePort] |
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| 103 | jne SHORT .BootMenuInfoForSingleDriveInDSBX |
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| 104 | |
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| 105 | mov di, si ; Slave Drive detected, copy pointer to DS:DI |
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| 106 | .BootMenuInfoForSingleDriveInDSBX: |
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| 107 | mov si, bx |
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| 108 | ret |
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| 109 | |
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| 110 | |
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| 111 | ;-------------------------------------------------------------------- |
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| 112 | ; AdvAtaInit_SelectSlowestTimingsToBXandCX |
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| 113 | ; Parameters: |
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| 114 | ; DS:SI: Ptr to BOOTMENUINFO for Master or Single Drive |
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| 115 | ; DI: Offset to BOOTMENUINFO for Slave Drive |
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| 116 | ; Zero if Slave Drive not present |
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| 117 | ; Returns: |
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| 118 | ; BX: Min Active Time in nanosecs |
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| 119 | ; CX: Min Recovery Time in nanosecs |
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| 120 | ; Corrupts registers: |
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| 121 | ; Nothing |
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| 122 | ;-------------------------------------------------------------------- |
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| 123 | AdvAtaInit_SelectSlowestTimingsToBXandCX: |
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| 124 | mov bx, [si+BOOTMENUINFO.wMinPioActiveTimeNs] |
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| 125 | mov cx, [si+BOOTMENUINFO.wMinPioRecoveryTimeNs] |
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| 126 | test di, di |
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| 127 | jz SHORT .ReturnSlowestTimingInBXandCX ; No Slave Drive |
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| 128 | |
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| 129 | ; If Active Time is greater, then must be the Recovery Time as well |
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| 130 | cmp bx, [di+BOOTMENUINFO.wMinPioActiveTimeNs] |
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| 131 | jbe SHORT .ReturnSlowestTimingInBXandCX |
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| 132 | mov bx, [di+BOOTMENUINFO.wMinPioActiveTimeNs] |
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| 133 | mov cx, [di+BOOTMENUINFO.wMinPioRecoveryTimeNs] |
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| 134 | .ReturnSlowestTimingInBXandCX: |
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| 135 | ret |
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