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|
;******************************************************************************
;
; (C) Copyright MICROSOFT Corp. 1986
;
; Title: CEMM.EXE - COMPAQ Expanded Memory Manager 386 Driver
; EMMLIB.LIB - Expanded Memory Manager Library
;
; Module: EMMDEF.INC - defines for EMM code.
;
; Version: 0.04
;
; Date: June 21, 1986
;
;******************************************************************************
;
; Change log:
;
; DATE REVISION DESCRIPTION
; -------- -------- -------------------------------------------------------
; 06/21/86 Original
; 06/25/86 0.02 Changed HANDLE_CNT 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).
; 05/25/88 Changed to meet LIM 4.0 Spec (PC)
;******************************************************************************
ifndef INC_LIST
.xlist
endif
;******************************************************************************
; G E N E R A L D E F I N E S
;******************************************************************************
EMM_PAGE_CNT = 2048 ; maximum of 2048 EMM pages (32MB)
HANDLE_CNT = 255 ; maximum of 255 EMM handles
FRS_COUNT = 16 ; number of 'Fast Register Sets'
EMM32_PHYS_PAGES = 4 ; page frame contains 4 pages
;
; The 0 to 1M contains 64 physical pages. Of these we are not mapping anything
; between E000 and FFFF, 0000 and 4000. So the Maximum physcial pages we can
; get for mapping is 40.
TOT_PHYS_PAGES equ 64
MAX_PHYS_PAGES equ 40 ; Life, the Universe
; and Everything
PAGE_SIZE = 1000h
;
; Of the above mappable pages the regions C000h to Dfffh have to be searched
; for the mappable pages.
;
ABOVE_CONV_STRT_SEG equ 0C000h
ABOVE_CONV_STRT_PG equ ABOVE_CONV_STRT_SEG SHR 10
;
ABOVE_CONV_END_SEG equ 0DC00h
ABOVE_CONV_END_PG equ ABOVE_CONV_END_SEG SHR 10
;
MAX_ABOVE_CONV_PAGES EQU 8
;
; Also the system memory mappable region starts at 4000h
;
CONV_STRT_SEG equ 4000h
CONV_STRT_PG equ CONV_STRT_SEG SHR 10
;
NUM_CONV_PGS equ (0A000h -4000h) SHR 10
;
; During init we keep track of mappable pages with an array of mappable_segs
;
PAGE_MAPPABLE equ 0FFh ;
PAGE_NOT_MAPPABLE equ 0h ;
NULL_PAGE = 0FFFFh
NULL_HANDLE = 00FFFh
;
; Flags for memory move/xchg
;
Source_GT_Dest_Flag = 80h ; Source > Destination for copy / xchg
Overlap_Flag = 40h ; Copy overlapping memory
Backward_Copy_Flag = 20h ; copy is going to be backward
;
; Flags for PFlag use in Alter Map and Jump
;
PFLAG_VM = 0002h ; VM bit in High word of EFLAG
PFLAG_VIRTUAL = 0020h ; wheather it's call from virtual or proected mode
PFLAG_PATCH_CS_IP = 0008h ; Tell Protected mode dispatch to
; patch new CS:IP onto it's return address
;******************************************************************************
; S T A T U S D E F I N E S
;******************************************************************************
OK = 0
EMM_SW_MALFUNCTION = 80h
EMM_HW_MALFUNCTION = 81h
INVALID_HANDLE = 83h
INVALID_FUNCTION = 84h
NO_MORE_HANDLES = 85h
SAVED_PAGE_DEALLOC = 86h
NOT_ENOUGH_EXT_MEM = 87h
NOT_ENOUGH_FREE_MEM = 88h
ZERO_PAGES = 89h
LOG_PAGE_RANGE = 8Ah
PHYS_PAGE_RANGE = 8Bh
SAVE_AREA_FULL = 8Ch
MAP_PREV_SAVED = 8Dh
NO_MAP_SAVED = 8Eh
INVALID_SUBFUNCTION = 8Fh
; LIM 4.0 extras
VALID_OVERLAP = 92h
INSUFFICIENT_EMM_PAGES = 93h
CONVENTIONAL_EMM_OVERLAP= 94h
INVALID_OFFSET = 95h
INVALID_REGION_LENGTH = 96h
OVERLAPPING_EXCHANGE = 97h
INVALID_MEMORY_TYPE = 98h
FRSETS_UNSUPPORTED = 99h
INVALID_FRSET = 9Ah
NO_MORE_FRSETS = 9Bh
FRSET_NON_ZERO = 9Ch
FRSET_UNDEFINED = 9Dh
FRSET_NO_DMA = 9Eh
FRSET_INVALID_DMA = 9Fh
HANDLE_NAME_NOT_FOUND = 0A0h
DUPLICATE_HANDLE_NAME = 0A1h
INVALID_WRAPAROUND = 0A2h
SOURCE_CORRUPTED = 0A3h
ACCESS_DENIED = 0A4h
;******************************************************************************
; GET/SET PAGE MAP SUBFUNCTION CODES
;******************************************************************************
GSPM_GET equ 0
GSPM_SET equ 1
GSPM_GETSET equ 2
GSPM_SIZE equ 3
;
; OSEnabled Values
;
OS_IDLE equ 0
OS_ENABLED equ 1
OS_DISABLED equ 2
;******************************************************************************
; S T R U C T U R E S
;******************************************************************************
;
; stack frame after pushad on real/virtual mode entry
;
r67_Frame struc
rDI dd ?
rSI dd ?
rBP dd ?
rSP dd ?
rBX dd ?
rDX dd ?
rCX dd ?
rAX dd ?
retaddr dw ?
rCS dw ?
PFlag dw ?
rDS dw ?
rES dw ?
rGS dw ?
rFS dw ?
r67_Frame ends
;
; for _handle_table
;
HandleTable_struc struc
ht_index dw NULL_PAGE ; index into emm_page for handle's pgs
ht_count dw 0 ; number of emm_pages for this handle
HandleTable_struc ends
;
; for _save_area
;
SaveMap_struc struc
s_handle dw NULL_HANDLE ; owning handle
s_map dw EMM32_PHYS_PAGES dup (NULL_PAGE) ; EMM page #s
SaveMap_struc ends
;
; structure linking segment with physical page number
;
Mappable_Page struc
mappable_seg dw ?
mappable_pg dw ?
Mappable_Page ends
;
; Get Partial Page Map
;
gppm_struc struc
gppm_count dw ?
gppm_segs dw ?
gppm_struc ends
;
; Structures used as arguments to Map Handle Array function
;
; For subfunction 0:
mha_array0 struc
mha0_log_pg dw ?
mha0_phys_pg dw ?
mha_array0 ends
; For subfunction 1:
mha_array1 struc
mha1_log_pg dw ?
mha1_seg dw ?
mha_array1 ends
; Used by Map and Jump and Map and Call -- Identical to mha_array0 and 1
log_phys_map_struct struc
log_page_number dw ?
phys_page_number_seg dw ?
log_phys_map_struct ends
; Map and Jump structure
maj_struct struc
maj_target_address dd ?
maj_log_phys_map_len db ?
maj_map_address dd ?
maj_struct ends
; Map and Call structure
mac_struct struc
mac_target_address dd ?
mac_new_page_map_len db ?
mac_new_map_address dd ?
mac_old_page_map_len db ?
mac_old_map_address dd ?
mac_reserved dw 4 dup (?)
mac_struct ends
; Move / Exchange memory structure
mem_memory_descriptor_struct struc
mem_memory_type db ?
mem_handle dw ?
mem_initial_offset dw ?
mem_initial_seg_page dw ?
mem_memory_descriptor_struct ends
mem_struct struc
mem_region_length dd ?
mem_source db (SIZE mem_memory_descriptor_struct) dup (?)
mem_dest db (SIZE mem_memory_descriptor_struct) dup (?)
mem_struct ends
;
; Fast Register Set Description
;
FRS_struc struc
FRS_Window dw MAX_PHYS_PAGES dup (NULL_PAGE) ; emm page numbers
FRS_alloc dw 0 ; Is this set allocated
FRS_struc ends
page
;****************************************************************************
;
; Dword_Align -- Aligns code to dword boundry by inserting nops
;
;****************************************************************************
Dword_Align MACRO Seg_Name
IF (($ - OFFSET Seg_Name:0) MOD 4)
db 90h ;; Nop in code / else byte of 90h in data
Dword_Align Seg_Name
ENDIF
ENDM
page
;***********************************************
;
; Validate_Handle - check the handle in DX
;
; ENTRY: Handle as per LIM4.0 spec. in DX
;
; EXIT: If the handle is invalid jump To Death_Label, otherwise,
; EDX points to the _handle_table entry for the handle
;
; USES: EDX
;
;***********************************************
Validate_Handle MACRO Death_Label
cmp dx, [_handle_table_size] ;Q: handle in range ?
jae Death_Label ; N: go to error label
shl dx, 2 ; Y: convert handle to
add dx, offset _handle_table ; pointer
xchg bx, dx
cmp [bx.ht_index], NULL_PAGE ;Q: is this handle active ?
xchg bx, dx
je Death_Label ; N: return error
ENDM
;***********************************************
;
; Handle2HandlePtr - convert the handle in DX to
; points into handle_table
;
; ENTRY: Handle as per LIM4.0 spec. in DX
;
; EXIT: EDX points to the _handle_table entry for the handle
;
; USES: EDX
;
;***********************************************
Handle2HandlePtr MACRO
shl dx, 2 ; Y: convert handle to
add dx, offset _handle_table ; pointer
ENDM
.list ; end of EMMDEF.INC
|
