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emmfunct.inc
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操作系统开发
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Visual C++
- ifndef INC_LIST
- .xlist
- endif
- ;******************************************************************************
- ;
- ; (C) Copyright MICROSOFT Corp. 1986-1991
- ; (C) Copyright COMPAQ Computer Corp. 1986-1991
- ;
- ; Title: EMM386.EXE - MICROSOFT Expanded Memory Manager 386 Driver
- ; EMMLIB.LIB - Expanded Memory Manager Library
- ;
- ; Module: EMMFUNCT.INC - defines for EMM code.
- ;
- ; Version: 0.10
- ;
- ; Date: June 21, 1986
- ;
- ; Author: Steve Preston
- ;
- ;******************************************************************************
- ;
- ; Change log:
- ;
- ; DATE REV DESCRIPTION
- ; -------- ------ -----------------------------------------------------
- ; 06/21/86 0.0
- ; 06/25/86 0.02 Changed TOTAL_HANDLES to 255 to match LIM spec (SBP).
- ; 06/28/86 0.02 Name change from CEMM386 to CEMM (SBP).
- ; 07/06/86 0.04 Changed save area struct (SBP).
- ; 01/01/89 0.10 Rewritten for LIM 4.0 (DJM).
- ;******************************************************************************
- ;******************************************************************************
- ; GENERAL DEFINES
- ;******************************************************************************
- MAX_HANDLES EQU 255 ; total number of handles supported
- MAX_REGISTER_SETS EQU 255 ; number of register sets
- TOTAL_EMS_WINDOWS EQU 48 ; Maximum number of 4.0 windows
- TOTAL_PF_WINDOWS EQU 4 ; total number of 3.2 windows
- TOTAL_PAGE_TABLES = 10 ; total number of page tables
- NUMBER_BASE_WINDOWS = 16 ; number of windows from 256k to 512k
- FIRST_HANDLE_PTE = 0C00h ; starting location for handles
- TOTAL_HANDLE_PTES = 1000h ; number of handle PTEs
- PAGE_SIZE = 1000h ; 4k page size
- EMS_PAGE_SIZE = 4000H ; 16k EMS pages
- START_OF_ROM_MEMORY = 0E000h
- MAX_SIZE = (32 * 1024) ; max size of EMS memory pool
- MS_DOS = 21h ; DOS interrupts
- PRINT_STRING = 09h ; DOS print string
- GET_VERSION = 30h ; DOS get version
- X_HI_MEM_SEG = 0F000h ; segment for the following words
- X_MT_AT = 0FFFEh ; Machine type
- DOS3X_ADJ = 1 ; DOS 3.x base memory adjustment
- MAX_ARG_LEN = 5 ; max command line argument length
- OS_ENABLED_BIT = 0 ; bit index into OS_function variable
- OS_KEY_OUT_BIT = 1 ; bit index into OS_function variable
- SAVE_MAP_IN_USE_BIT = 15 ; bit index into the save_map array
- PAGE_ALLOCATED_BIT = 9 ; bit index into a page table entry
- PAGE_ALLOCATED_BIT_MASK = 0200h ; bit mask for above bit
- VCPI_USAGE_BIT = 10 ; bit index into a page table entry
- HANDLE_ALLOCATED_BIT = 11 ; bit index into a page table entry
- HANDLE_ALLOCATED_BIT_SET= 800h ; bit index into a page table entry
- TRUE = 1
- FALSE = 0
- FREE = -1 ; for save_flag
- EMS_STATUS_FUNCTION = 40h
- VCPI_FUNCTION_OPCODE = 0DEh
- NULL_PAGE = 7FFFh ; defines a handle not in use
- PTE_ADDRESS_BIT_MASK = 0FFFFF000h ; bit mask for a page table entry
- PTE_CONTROL_BIT_MASK = 000000FFFh ; bit mask for a page table entry
- EMM_VERSION = 040h ; the current version
- UNMAP_WINDOW_OPCODE = 0FFFFh ; for unmapping a window
- DOS_MASTER_VECTOR = 08h ; normal DOS master 8259 vector
- DOS_SLAVE_VECTOR = 70h ; normal DOS slave 8259 vector
- TSS_RESET_BUSY equ 0FDh ; for turning off the TSS's busy bit
- ;******************************************************************************
- ; STATUS DEFINES
- ;******************************************************************************
- OK = 0
- EMM_SW_MALFUNCTION = 080h
- EMM_HW_MALFUNCTION = 081h
- INVALID_HANDLE = 083h
- INVALID_FUNCTION = 084h
- NO_MORE_HANDLES = 085h
- SAVED_PAGE_DEALLOC = 086h
- NOT_ENOUGH_EXT_MEM = 087h
- NOT_ENOUGH_FREE_MEM = 088h
- ZERO_PAGES = 089h
- LOG_PAGE_RANGE = 08Ah
- PHYS_PAGE_RANGE = 08Bh
- SAVE_AREA_FULL = 08Ch
- MAP_PREV_SAVED = 08Dh
- NO_MAP_SAVED = 08Eh
- INVALID_SUBFUNCTION = 08Fh
- NOT_SUPPORTED = 091h
- SUCCESSFUL_OVERLAP = 092h
- INSUFFICIENT_MEMORY = 093h
- INVALID_OFFSET = 095h
- INVALID_REGION = 096h
- INVALID_OVERLAP = 097h
- INVALID_SOURCE_TYPE = 098h
- UNSUPPORTED_REGISTER_SET= 09Ah
- NO_FREE_REGISTER_SETS = 09Bh
- NO_ALT_DMA_REG_SETS = 09Ch
- NO_ALT_REG_SETS = 09Ch
- INVALID_REGISTER_SET = 09Dh
- NO_DEDICATED_DMA = 09Eh
- NAME_NOT_FOUND = 0A0h
- INVALID_NAME = 0A1h
- WRAP_AT_1MB = 0A2h
- WINDOW_INDEX_RANGE = 0A3h
- ACCESS_DENIED = 0A4h
- ;==============================================================================
- ;== Flags used allocation/deallocation of memory
- ;==============================================================================
- fEMSPageAllocatedBit equ 9 ; bit to indicate an EMS allocated page
- fVCPIPageAllocatedBit equ 10 ; bit to indicate a VCPI allocated page
- fXMSPageAllocatedBit equ 11 ; bit to indicate a page from XMS pool
- fEMSPageAllocated equ 1 shl fEMSPageAllocatedBit
- fVCPIPageAllocated equ 1 shl fVCPIPageAllocatedBit
- fXMSPageAllocated equ 1 shl fXMSPageAllocatedBit
- fWINPageBit equ 9 ; bit to indicate page for WINdows
- fWINPage equ 1 shl fWINPageBit
- ;==============================================================================
- ;== Flags used for Page4K[] array.
- ;==============================================================================
- INUSEbit equ 0 ; for WinSrch: ROM and default eXclude
- EXCLUDEbit equ 1 ; for user specified X= parameter
- RAMbit equ 2 ; for RAM=mmmm-nnnn
- EMSbit equ 3 ; for EMS=mmmm-nnnn
- ROMbit equ 4 ; for ROM=mmmm-nnnn
- WINbit equ 5 ; for WIN=mmmm-nnnn
- INUSE equ 1 shl INUSEbit
- EXCLUDE equ 1 shl EXCLUDEbit
- RAM equ 1 shl RAMbit
- EMS equ 1 shl EMSbit
- ROM equ 1 shl ROMbit
- WIN equ 1 shl WINbit
- ;******************************************************************************
- ; VCPI STATUS DEFINES
- ;******************************************************************************
- SUCCESS equ 000h ; return code for AH using 32-bit regs
- FAILURE equ 0ffh ; return code for AH using 32-bit regs
- D_PRES equ 080h ; present in memory
- D_DPL0 equ 0 ; Ring 0
- D_CTRL equ 0 ; Control descriptor
- D_386INT_GATE equ 0eh ; 386 interrupt gate
- D_386INT0 equ (D_PRES+D_DPL0+D_CTRL+D_386INT_GATE) ; Ring 0 int gate
- ;******************************************************************************
- ; S T R U C T U R E S
- ;******************************************************************************
- ;***********************************************************************
- ; EMSmap[]
- ; This structure is used for holding info about the EMS windows.
- ; The windows mapping consist of PTE entries.
- ;***********************************************************************
- EMSmap_struc struc
- dd 0
- EMSmap_struc ends
- ;***********************************************************************
- ; RegisterStack_struc[]
- ; This structure is used for accessing the user's original registers.
- ; There are 2 EBP locations which have different meanings depending
- ; on how CEMM was called. If CEMM was on (in protected mode) then
- ; 'stack_frame_EBP' points to the fault stack frame on the ring zero
- ; stack and 'reg_EBP' is the user's EBP. If CEMM was off (in real mode)
- ; then 'stack_frame_EBP' is the user's original EBP and there is no
- ; fault stack frame.
- ;***********************************************************************
- RegisterStack_struc struc
- reg_EDI dd ?
- reg_ESI dd ?
- stack_frame_EBP dd ?
- reg_ESP dd ?
- reg_EBX dd ?
- reg_EDX dd ?
- reg_ECX dd ?
- reg_EAX dd ?
- ret_IP dw ?
- ret_CS dw ?
- reg_DS dw ?
- reg_ES dw ?
- reg_EBP dd ?
- RegisterStack_struc ends
- ;***********************************************************************
- ; register_set[]
- ; This structure is used with the register_set array. The
- ; 'active' fields specifies if this register set has been allocated
- ; or not. The 'saved_mapping' is the window mapping for this set.
- ;***********************************************************************
- RegisterSet_struc struc
- active db 0
- RSrsvd db 0
- a20_state dw 0
- page_table_ptr dd 0
- RegisterSet_struc ends
- ifdef QEMS
- RegisterSet_struc struc
- active db 0
- a20_state dw 0
- page_table_ptr dd 0
- saved_mapping dw 0
- dd TOTAL_EMS_WINDOWS dup (NULL_PAGE)
- RegisterSet_struc ends
- endif
- ;***********************************************************************
- ; handle_table[]
- ; This structure is used with the handle_table[] array for
- ; holding handle information. The 'base_PTE_index' is the PTE index
- ; where the handle starts at. The 'number_PTEs' is how many PTE's
- ; are allocated to this handle. The PTE's are always contiguous and
- ; for each PTE, the address saved in it is allocated to that handle.
- ; A value of NULL_PAGE in 'base_PTE_index' means the handle is free.
- ;***********************************************************************
- HandleTable_struc struc
- base_PTE_index dw ?
- number_PTEs dw ?
- HandleTable_struc ends
- HandleName_struc STRUC
- DB 8 DUP (0)
- HandleName_struc ENDS
- HandleSaveMap_struc STRUC
- dd 4 dup (0)
- HandleSaveMap_struc ENDS
- ifdef QEMS
- ;***********************************************************************
- ; EMS_window[]
- ; This structure is used for holding info about the EMS windows.
- ; The windows mapping consist of its handle and logical page.
- ;***********************************************************************
- EMS_window_struc struc
- handle DB ?
- logical_4k_page dw ?
- EMS_window_struc ends
- endif
- ;***********************************************************************
- ; MACROS
- ; These macro's are needed due to a 80386 bug in versions prior to
- ; the D step. The problem is that the EDI register will not be
- ; incremented correctly but only the 16 bit DI register is if an
- ; address size override instruction does not follow.
- ;***********************************************************************
- REP_MOVS_DWORD_USING_DS_ESI macro
- rep movs dword ptr es:[edi],dword ptr ds:[esi]
- db 67h
- nop
- endm
- REP_MOVS_WORD_USING_DS_ESI macro
- rep movs word ptr es:[edi], word ptr ds:[esi]
- db 67h
- nop
- endm
- REP_MOVS_BYTE_USING_DS_ESI macro
- rep movs BYTE ptr es:[edi], BYTE ptr ds:[esi]
- db 67h
- nop
- endm
- MOVS_DWORD_USING_DS_ESI macro
- movs dword ptr es:[edi],dword ptr ds:[esi]
- db 67h
- nop
- endm
- MOVS_WORD_USING_DS_ESI macro
- movs word ptr es:[edi],word ptr ds:[esi]
- db 67h
- nop
- endm
- REP_MOVS_DWORD_USING_ES_ESI macro
- rep movs dword ptr es:[edi],dword ptr es:[esi]
- db 67h
- nop
- endm
- MOVS_DWORD_USING_ES_ESI macro
- movs dword ptr es:[edi],dword ptr es:[esi]
- db 67h
- nop
- endm
- REP_MOVS_BYTE_USING_ES_ESI macro
- rep movs byte ptr es:[edi],byte ptr es:[esi]
- db 67h
- nop
- endm
- MOVS_BYTE_USING_ES_ESI macro
- movs byte ptr es:[edi],byte ptr es:[esi]
- db 67h
- nop
- endm
- STOS_BYTE_PTR_ES_EDI macro
- stos byte ptr es:[edi]
- db 67h ; Address mode prefix
- nop
- endm
- STOS_WORD_PTR_ES_EDI macro
- stos word ptr es:[edi]
- db 67h ; Address mode prefix
- nop
- endm
- STOS_DWORD_PTR_ES_EDI macro
- stos dword ptr es:[edi]
- db 67h ; Address mode prefix
- nop
- endm
- REP_STOS_DWORD_PTR_ES_EDI macro
- rep stos dword ptr es:[edi]
- db 67h ; Address mode prefix
- nop
- endm
- LODS_BYTE_PTR_ES_ESI macro
- lods byte ptr es:[esi]
- db 67h ; Address mode prefix
- nop
- endm
- LODS_WORD_PTR_ES_ESI macro
- lods word ptr es:[esi]
- db 67h ; Address mode prefix
- nop
- endm
- LODS_DWORD_PTR_ES_ESI macro
- lods dword ptr es:[esi]
- db 67h ; Address mode prefix
- nop
- endm
- .list
