| 1 | ; ----------------------------------------------------------------------------
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| 2 | ; Initialization routines and segment mappings for idctest driver.
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| 3 | ;
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| 4 | ; This is a stripped down version of os2ahci's init.asm.
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| 5 |
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| 6 | include devhdr.inc
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| 7 |
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| 8 | ; -----------------------------------------------------------------------------
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| 9 | ; Public symbols
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| 10 |
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| 11 | PUBLIC _asm_strat ; low-level strategy routine
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| 12 | PUBLIC _end_of_data ; end of all data (label)
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| 13 | PUBLIC _end_of_code ; end of all code (label)
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| 14 |
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| 15 | ; ----------------------------------------------------------------------------
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| 16 | ; Device Driver Header
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| 17 |
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| 18 | DEVHDR SEGMENT WORD PUBLIC 'DATA'
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| 19 | _dev_hdr dd -1 ; next device header
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| 20 | dw DEVLEV_3 + DEV_CHAR_DEV ; flags for ADD drivers
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| 21 | dw OFFSET _asm_strat ; strategy routine
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| 22 | dw 0 ; IDC entry point
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| 23 | db "IDCTEST$" ; name of character device
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| 24 | dq 0 ; 8 reserved bytes
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| 25 | dd 0 ; ADD flags
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| 26 | dw 0
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| 27 | DEVHDR ENDS
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| 28 |
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| 29 | ; ----------------------------------------------------------------------------
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| 30 | ; Segment Definitions. We need to reference all segments here, even if they
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| 31 | ; are not used, to allow proper grouping of all segments into one group for
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| 32 | ; data and one group for code as well as proper ordering of the segments
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| 33 | ; within each group to make sure the end of segment markers are at the end
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| 34 | ; of each group.
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| 35 |
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| 36 | ; On top of that, we need to make sure that the end of segment marker is in
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| 37 | ; a data segment of class 'BSS' because BSS segments are always put towards
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| 38 | ; the end of the executable when linking with high-level language objects
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| 39 | ; such as C.
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| 40 |
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| 41 | _DATA SEGMENT WORD PUBLIC 'DATA'
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| 42 | _DATA ENDS
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| 43 |
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| 44 | CONST SEGMENT WORD PUBLIC 'CONST'
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| 45 | CONST ENDS
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| 46 |
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| 47 | _BSS SEGMENT WORD PUBLIC 'BSS'
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| 48 | _BSS ENDS
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| 49 |
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| 50 | c_common SEGMENT WORD PUBLIC 'BSS'
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| 51 | c_common ENDS
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| 52 |
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| 53 | _z_data SEGMENT WORD PUBLIC 'BSS'
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| 54 | _end_of_data db 0
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| 55 | _z_data ENDS
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| 56 |
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| 57 | _TEXT SEGMENT WORD PUBLIC 'CODE'
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| 58 | EXTRN _c_strat_idc : NEAR ; C strategy routine
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| 59 | _TEXT ENDS
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| 60 |
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| 61 | CODE SEGMENT WORD PUBLIC 'CODE'
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| 62 | CODE ENDS
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| 63 |
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| 64 | RMCode SEGMENT WORD PUBLIC 'CODE'
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| 65 | RMCode ENDS
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| 66 |
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| 67 | LIBCODE SEGMENT WORD PUBLIC 'CODE'
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| 68 | LIBCODE ENDS
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| 69 |
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| 70 | _z_text SEGMENT WORD PUBLIC 'CODE'
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| 71 | _end_of_code LABEL NEAR
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| 72 | _z_text ENDS
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| 73 |
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| 74 | DGROUP GROUP DEVHDR, _DATA, CONST, _BSS, c_common, _z_data
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| 75 | TGROUP GROUP _TEXT, CODE, _z_text
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| 76 |
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| 77 | ; ----------------------------------------------------------------------------
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| 78 | ; Start of code
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| 79 |
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| 80 | _TEXT SEGMENT WORD PUBLIC 'CODE'
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| 81 | ASSUME DS:DGROUP
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| 82 | ASSUME ES:NOTHING
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| 83 | ASSUME SS:NOTHING
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| 84 |
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| 85 |
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| 86 | ; Device driver main entry point (strategy routine)
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| 87 | _asm_strat PROC FAR
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| 88 |
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| 89 | ; push request packet address
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| 90 | PUSH ES
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| 91 | PUSH BX
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| 92 | CLD
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| 93 |
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| 94 | ; call C strategy routine
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| 95 | CALL _c_strat_idc
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| 96 |
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| 97 | POP BX
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| 98 | POP ES
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| 99 | MOV WORD PTR ES:[BX+3], AX
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| 100 | RET
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| 101 | _asm_strat ENDP
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| 102 |
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| 103 |
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| 104 | _TEXT ENDS
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| 105 |
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| 106 | END
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| 107 |
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