375 lines
9.7 KiB
PHP
375 lines
9.7 KiB
PHP
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;*** dxvcpi.inc - include file for vcpi functions/maintenance
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;
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; Copyright <C> 1990-1991, Microsoft Corporation
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;
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; Purpose:
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;
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; Revision History:
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;
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; 08-07-90 earleh rearranged things to allow building Pmode data
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; structures with total size exceeding that of LIM 3.2 page
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; frame
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; 05/09/90 jimmat Started incorporating VCPI changes from languages group.
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;
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; [] 20-Feb-1990 Dans Created
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;
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;************************************************************************/
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CurrentCpu = @Cpu ;select 386 assembly if not already
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ife (CurrentCpu AND 0008h)
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.386
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endif
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;
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; Hungarian used:
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; la Linear Address
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; za Physical Address
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;
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;
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;
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; Miscellaneous equates
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;
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EMS_INT = 067h
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VCPIINT = 067h
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CBEMMSTR = 8h
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CPTDX = 1h ; count of user page tables dx uses
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CPTDXEXT = (CPTDX+1) ; count of total page tables dx uses
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CBPAGE386 = 1000h ; bytes in 386 page
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CBPAGE386LIM = 1000h-1
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DXINDOS = 00000001b
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DXINEMS = 00000010b ; obsolete
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DXINVCPI = 00000100b
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DXINXMS = 00001000b
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;
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; See dxvcpi.asm for a rough sketch of the memory block that the
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; following variables describe
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DXLINEARBASE = 80000000h ; Linear base of DX system memory
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VCPIPTOFF = 0 * CBPAGE386 ; vcpi's 0th page table
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DXPT1OFF = 1 * CBPAGE386 ; dx's first user page table
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DXPTSYSOFF = DXPT1OFF + (CPTDX * CBPAGE386)
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; dx's system page table
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DXPDOFF = DXPTSYSOFF + CBPAGE386 ; page directory
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DXLASTPTOFF = DXPDOFF
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DXBOOTPTOFF = DXPTSYSOFF
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;
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; Last user page table is used to bootstrap our protected mode
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; data into extended memory.
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;
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DXTEMPPTOFF = DXPTSYSOFF - CBPAGE386
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DX_TEMP_LINEARBASE = (DXTEMPPTOFF - VCPIPTOFF) shl 10
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;
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; The next number comes from the dosx.map file, and is equal to the
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; offset of the CODEENDPM symbol, plus whatever padding we want to use
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; so we don't have to update this include file too often.
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;
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if DEBUG
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DXPMCODESIZE = 04900H
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else ; DEBUG
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DXPMCODESIZE = 04000H
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endif ; DEBUG
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IDTOFF = DXLASTPTOFF + CBPAGE386
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IDTSIZE = CDSCIDTDEFAULT * 8
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IDTLIM = IDTSIZE - 1
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TSSOFF = IDTOFF + IDTSIZE
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TSSTOP = TSSOFF + (type TSS386)
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GDTOFF = ((TSSTOP + 0fh) shr 4) shl 4 ; paragraph align
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GDTLIM = GDT_SIZE - 1
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GDTTOP = GDTOFF + GDT_SIZE
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DXPMCODEOFF = ((GDTTOP + 0fh) shr 4) shl 4 ; paragraph align
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LDTOFF = ((DXPMCODEOFF + DXPMCODESIZE + CBPAGE386 - 1) shr 12) shl 12
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LDTSIZE = CDSCMAXLDT * 8
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LDTLIM = LDTSIZE - 1
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LDTTOP = LDTOFF + LDTSIZE
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;
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; Final place where page tables are mapped in Protected mode is
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; at the first linear page boundary after the end of the LDT.
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;
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USERPT = (LDTTOP + CBPAGE386 - 1) shr 12
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USERPTOFF = ((LDTTOP + CBPAGE386 - 1) shr 12) shl 12
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;
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; The total number of 386 pages we need for the block that holds our
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; system tables and protected mode code.
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;
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DXPMPAGES = (LDTTOP + (CBPAGE386 - 1)) shr 12
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DXPMBYTES = DXPMPAGES shl 12
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DXPMPARAGRAPHS = DXPMBYTES shr 4
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;
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; compile time asserts for sizes/offsets/alignment
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;
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.ERRE (type TSS386) GE 104
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.ERRE TSSTOP LE GDTOFF
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.ERRE IDTOFF EQ ((IDTOFF SHR 4) SHL 4)
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;
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; Limits of tables
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;
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DXPTMAX = CPTDX * CBPAGE386 ; space we allocate for
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; user page tables
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;
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; Linear pointers to bases of various tables when running under vcpi
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;
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; For a selDXPD descriptor (dos extender's page directory)
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;
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LADXPDBASE = DXLINEARBASE + DXPDOFF
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; For a selDXPT descriptor (dos extender's page tables)
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;
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LADXPTBASE = DXLINEARBASE + USERPTOFF ; (Plus runtime value.)
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; For a selGDT descriptor
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;
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LADXGDTBASE = DXLINEARBASE + GDTOFF
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; For a selLDT descriptor
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;
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LADXLDTBASE = DXLINEARBASE + LDTOFF
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; For a selIDT descriptor
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;
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LADXIDTBASE = DXLINEARBASE + IDTOFF
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; For a selTSS descriptor
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;
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LADXTSS1BASE = DXLINEARBASE + TSSOFF
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LADXTSS2BASE = DXLINEARBASE + TSSOFF + type TSS386
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; For a SEL_DXPMCODE descriptor
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;
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LADXPMCODEBASE = DXLINEARBASE + DXPMCODEOFF
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;
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; vcpi/ems service macros
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;
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RMvcpi macro fCode
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ifnb <fCode>
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mov ax, fCode
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endif
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int VCPIINT
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endm
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PMvcpi macro fCode
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ifnb <fCode>
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mov ax, fCode
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endif
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cCall CallVCPIPM
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endm
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emscall macro fCode
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ifnb <fCode>
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mov ax, fCode
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endif
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int EMS_INT
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endm
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; EMS functions/subfunctions
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GETFRAMEADDRESS = 04100h
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ALLOCATEPAGES = 05A00h
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GETNUMOFPAGES = 04200h
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MAPHANDLEPAGE = 04400h
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DEALLOCATEPAGES = 04500h
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GETEMSVER = 04600h
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SETHANDLENAME = 05301h
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GETPAGEADDRS = 05800h
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GETNUMPAGEMAP = 05801h
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page
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;
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; VCPI functions/subfunctions
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; all functions take the vcpi function code in ax as input
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; all functions return ah=0 if successful, ah != 0 if failure
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; if function return has no ah value, it can't fail (ah == 0)
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;
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;
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; vcpi version, presence
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;
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vcpiVER = 0de00h
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;
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; input:
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; return: ah = 0, bl = vcpi minor revision, bh = major revision
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;
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; get protect mode interface
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;
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vcpiPMINTERFACE = 0de01h
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;
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; input: es:di = ptr to 4k page table,
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; ds:si = ptr to 3 entries in GDT
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; return: di = 1st unused page table entry,
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; ebx = offset in server CS of PM entry point
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;
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; get max physical address in system
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;
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vcpiMAXPHYSADDR = 0de02h
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;
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; input:
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; return: edx = physical addr of highest 4k page that
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; could ever be allocated
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;
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; count of free 4k pages
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;
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; Note: This call gives the total 386 pages available to all tasks
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; in the system from the VCPI server. According to VCPI version 1.0,
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; however, we should only allocate as much memory as there is EMS
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; memory available. The following call, therefore, is not real useful
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; to us.
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;
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vcpiCFREEPAGES = 0de03h
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;
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; input:
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; return: edx = number of free 4k pages
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;
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; allocate a 4k page
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;
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vcpiALLOCPAGE = 0de04h
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;
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; input:
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; return: ah = 0, edx = physical address of allocated 4k page
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; ah != 0, edx = trashed
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;
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; free a 4k page
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;
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vcpiFREEPAGE = 0de05h
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;
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; input: edx = physical address of page to free
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; return: ah = 0
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; ah != 0
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;
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; physical address of page in 1st meg
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;
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vcpiPHYSADDRPAGE= 0de06h
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;
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; input: cx = page number (linear addr of page SHR by 12)
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; return: ah = 0, edx = physical address of 4k page
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; ah != 0
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;
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; read cr0
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;
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vcpiREADCR0 = 0de07h
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;
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; input:
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; return: ebx = cr0 value
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;
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; read debug registers
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;
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vcpiREADDRx = 0de08h
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;
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; input: es:di = ptr to 8 dwords, dr0 first, dr4, dr5 not present
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; return:
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;
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; load debug registers
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;
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vcpiLOADDRx = 0de09h
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;
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; input: es:di = ptr to 8 dwords, dr0 first, dr4, dr5 not present
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; return:
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;
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; get mapping of hardware interrupts
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;
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vcpiGET8259MAP = 0de0ah
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;
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; input:
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; return: bx = 1st vector mapping for master 8259a
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; cx = 1st vector mapping for slave 8259a
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; set mapping of hardware interrupts
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;
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vcpiSET8259MAP = 0de0bh
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;
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; input: interrupts disabled
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; bx = 1st vector mapping for master 8259a
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; cx = 1st vector mapping for slave 8259a
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; return:
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;
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; switch from v86 mode to protect mode or protect mode to v86 mode
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;
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vcpiSWITCHTOPM = 0de0ch
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;
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; input: interrupts disabled
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; esi = linear address (in first megabyte) of data
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; structure (v86topm struc)
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;
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; return: (output in pm)
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; gdtr, idtr, ldtr, tr loaded
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; ss:esp must have 16 bytes of space on it, pm must
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; set up it's stack
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; eax = trashed
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; esi = trashed
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; ds, es, fs, gs all modified
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; interrupts disabled
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;
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vcpiSWITCHTOV86 = 0de0ch
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;
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; input: interrupts disabled
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; STACK: 28 dword gs
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; 24 dword fs
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; 20 dword ds
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; 1c dword es
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; 18 dword ss
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; 14 dword esp
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; 10 dword eflags reserved
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; 0c dword cs xfer to
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; 08 dword eip xfer to
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; 00 qword far32 return (garbage)
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;
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;
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; return: (output in rm)
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; ss:esp loaded with values from stack
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; segment registers loaded with stack values
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; eax = trashed
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; interrupts disabled
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;
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; structures
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;
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VTP struc
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zaCr3VTP dd 0 ; physical addr of page directory
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laGdtrVTP dd 0 ; linear addr in first meg of gdtr
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laIdtrVTP dd 0 ; linear addr in first meg of idtr
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selLdtVTP dw 0 ; selector of ldt
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selTrVTP dw 0 ; selector of tr
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ipVTP dw 0 ; 48-bit address of protect
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unusedVTP dw 0 ; mode entry point to xfer to
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csVTP dw 0 ;
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VTP ends
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ife (CurrentCpu AND 0008h) ;restore cpu type if not 386
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if (CurrentCpu AND 0080h)
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.286p
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else
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.286
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endif
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endif
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