10f1d28ac1
o Remove init printf o Don't set optind from return value for do_args. getopt has already done this. o Bump EMS memory from 1M to 10M (this really should be a command line option). o Open /dev/null when requested to open emmxxxx0 to allow many programs checking to see if EMS is installed to find it. o Route int67 to ems_entry to allow EMS to be used when DOS is emulated as well as when DOS is booted. This may obviate the need for the driver doing anything at all in a really booted situation and won't hurt that case. I can now run the DOS program I'm interested in running with enough EMS memory that its "advanced" functions are enabled and working.
314 lines
9.6 KiB
C
314 lines
9.6 KiB
C
/*-
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* Copyright (c) 1997 Helmut Wirth <hfwirth@ping.at>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice immediately at the beginning of the file, witout modification,
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* this list of conditions, and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $Id: ems.h,v 1.1 1997/09/30 22:03:45 jlemon Exp $
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*/
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#ifndef EMS_H
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#define EMS_H
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/* Header for ems.c, the EMS emulation */
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/* Global definitions, some of them will be configurable in the future */
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#define EMS_NUM_HANDLES 256 /* Includes OS handle 0 */
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#define EMS_MAXSIZE 10240 /* In kbytes */
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#define EMS_MAX_PHYS 4 /* Frame is 64kB */
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#define EMS_FRAME_ADDR 0xe0000
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#define EMS_VERSION 0x40 /* Version 4.0 */
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#define EMS_PAGESIZE (16 *1024) /* page size in bytes */
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#define EMS_SAVEMAGIC 0xAFFE /* magic number */
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/* These are the LIM EMS 3.0 calls */
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#define GET_MANAGER_STATUS 0x40
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#define GET_PAGE_FRAME_SEGMENT 0x41
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#define GET_PAGE_COUNTS 0x42
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#define GET_HANDLE_AND_ALLOCATE 0x43
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#define MAP_UNMAP 0x44
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#define DEALLOCATE_HANDLE 0x45
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#define GET_EMM_VERSION 0x46
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#define SAVE_PAGE_MAP 0x47
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#define RESTORE_PAGE_MAP 0x48
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#define RESERVED_1 0x49
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#define RESERVED_2 0x4a
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#define GET_HANDLE_COUNT 0x4b
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#define GET_PAGES_OWNED 0x4c
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#define GET_PAGES_FOR_ALL 0x4d
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/* LIM EMS 4.0 calls */
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/* Global subfunctions for the LIM EMS 4.0 calls */
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#define GET 0x0
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#define SET 0x1
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/* Modes for Map/Unmap and AlterandCall/AlterAndJump */
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#define PHYS_ADDR 0x0
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#define SEG_ADDR 0x0
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/* Page map functions */
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#define PAGE_MAP 0x4e
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#define PAGE_MAP_PARTIAL 0x4f
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/* Page map subfunctions */
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#define GET_SET 0x2
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#define GET_SIZE 0x3
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#define MAP_UNMAP_MULTI_HANDLE 0x50
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#define REALLOC_PAGES 0x51
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#define HANDLE_ATTRIBUTES 0x52
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/* Subfunctions */
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#define HANDLE_CAPABILITY 0x2
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#define HANDLE_NAME 0x53
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#define HANDLE_DIRECTORY 0x54
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#define HANDLE_SEARCH 0x1
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#define GET_TOTAL_HANDLES 0x2
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#define ALTER_PAGEMAP_JUMP 0x55
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#define ALTER_PAGEMAP_CALL 0x56
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/* Subfunction for call */
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#define GET_STACK_SIZE 0x2
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#define MOVE_MEMORY_REGION 0x57
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/* Subfunctions */
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#define MOVE 0x0
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#define EXCHANGE 0x1
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#define GET_MAPPABLE_PHYS_ADDR 0x58
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/* Subfunctions */
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#define GET_ARRAY 0x0
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#define GET_ARRAY_ENTRIES 0x1
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#define GET_HW_CONFIGURATION 0x59
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/* Subfunctions */
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#define GET_HW_ARRAY 0x0
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#define GET_RAW_PAGE_COUNT 0x1
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#define ALLOCATE_PAGES 0x5a
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/* Subfunctions */
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#define ALLOC_STANDARD 0x0
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#define ALLOC_RAW 0x1
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#define ALTERNATE_MAP_REGISTER 0x5b
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/* Subfunctions */
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#define GET_SAVE_ARRAY_SIZE 0x2
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#define ALLOCATE_REGISTER_SET 0x3
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#define DEALLOCATE_REGISTER_SET 0x4
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#define ALLOCATE_DMA 0x5
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#define ENABLE_DMA 0x6
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#define DISABLE_DMA 0x7
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#define DEALLOCATE_DMA 0x8
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#define PREPARE_WARMBOOT 0x5c
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#define OS_FUNCTION_SET 0x5d
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/* Subfunctions */
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#define ENABLE 0x0
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#define DISABLE 0x1
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#define RETURN_KEY 0x2
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/* End of call definitions */
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/* EMS errors */
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#define EMS_SUCCESS 0x0
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#define EMS_SW_MALFUNC 0x80
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#define EMS_HW_MALFUNC 0x81
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#define EMS_INV_HANDLE 0x83
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#define EMS_FUNC_NOSUP 0x84
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#define EMS_OUT_OF_HANDLES 0x85
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#define EMS_SAVED_MAP 0x86
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#define EMS_OUT_OF_PHYS 0x87
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#define EMS_OUT_OF_LOG 0x88
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#define EMS_ZERO_PAGES 0x89
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#define EMS_LOGPAGE_TOOBIG 0x8a
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#define EMS_ILL_PHYS 0x8b
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#define EMS_NO_ROOM_TO_SAVE 0x8c
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#define EMS_ALREADY_SAVED 0x8d
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#define EMS_NO_SAVED_CONTEXT 0x8e
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#define EMS_INVALID_SUB 0x8f
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#define EMS_INVALID_ATTR 0x90
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#define EMS_FEAT_NOSUP 0x91
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#define EMS_MOVE_OVERLAP1 0x92
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#define EMS_MOVE_OVERFLOW 0x93
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#define EMS_PAGEOFFSET 0x95
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#define EMS_MOVE_OVERLAP2 0x97
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#define EMS_HNAME_NOT_FOUND 0xa0
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#define EMS_NAME_EXISTS 0xa1
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#define EMS_SAVED_CONTEXT_BAD 0xa3
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#define EMS_FUNCTION_DISABLED 0xa4
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/*
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* EMS handles: The handle contains at its end an array of pointers to
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* its allocated pages. The array is of size npages. Handle structs are
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* malloced at runtime.
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* Page numbering: Every page is 16kB, always. The pages are numbered
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* from 0 to highest page, depending on total EMS memory. Every handle
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* has pages allocated and this pages too are numbered from 0 to highest
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* page allocated. This are *not* the same numbers, because there may be
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* holes in the allocation.
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* Page numbers are unsigned short, which will give us 65536 * 16 kB (1GB)
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* pages to handle at maximum. This should be enough for the next years.
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*/
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typedef struct {
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short handle[4]; /* Handle for each mapping */
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u_char pos_mapped[4]; /* Boolean value, 1 if something is mapped */
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u_char pos_pagenum[4]; /* Page number currently mapped into position */
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} EMS_mapping_context;
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/* This union is for copying operations of the handle name only */
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typedef union {
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u_char uc_hn[8];
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u_long ul_hn[2];
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} Hname;
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typedef struct {
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Hname hname;
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u_long npages;
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/* The mapping context for save/restore page map */
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EMS_mapping_context *mcontext;
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/* The pagenum here is the number in the system page array. The
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* logical page number connected with this handle is the index into
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* this array.
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*/
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u_short pagenum[0];
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/* Will grow here, depending on allocation */
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} EMS_handle;
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/*
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* The connection between every page in the system and the handles is
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* maintained by an array of these structs. The array is indexed by the
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* page numbers.
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*/
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typedef struct {
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short handle; /* The handle this page belongs to */
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#define EMS_FREE 0
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#define EMS_ALLOCED 1
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#define EMS_MAPPED 2
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u_short status; /* room for misc information */
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} EMS_page;
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/*
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* The combined pointer into EMS memory: offs is the offset into an EMS
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* page, page is the page index inside the region allocated to a handle.
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* This depends on EMS_PAGESIZE.
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* This is used for copy and move operations.
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*/
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typedef struct {
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u_long offs:14;
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u_long page:18;
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} EMS_combi;
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typedef union {
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u_long ua_addr; /* Conventional address pointer */
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EMS_combi ua_emsaddr; /* EMS address pointer */
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} EMS_addr;
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#define EMS_OFFS(u) u.ua_emsaddr.offs
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#define EMS_PAGE(u) u.ua_emsaddr.page
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#define EMS_PTR(u) u.ua_addr
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/*
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* EMS info structure, only used to pass information to and from
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* DOS
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*/
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typedef struct {
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u_short handle __attribute__ ((packed)); /* handle */
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u_short npages __attribute__ ((packed)); /* pages allocated */
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} EMShandlepage;
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/*
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* EMS map/unmap multiple, only used to pass information to and from
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* DOS
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*/
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typedef struct {
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u_short log __attribute__ ((packed)); /* logical page number */
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u_short phys __attribute__ ((packed)); /* physical page (position) or
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segment address inside frame */
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} EMSmapunmap;
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/*
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* EMS handle directory, only used to pass information to and from
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* DOS
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*/
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typedef struct {
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u_short log __attribute__ ((packed)); /* logical page number */
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Hname name __attribute__ ((packed)); /* Handle name */
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} EMShandledir;
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/*
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* Structure for get/set page map: This structure is used to save and
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* restore the page map from DOS memory. A program can get the mapping
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* context and later set (restore) it. To avoid errors we add a magic
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* number and a checksum.
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*/
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typedef struct {
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u_short magic; /* Magic number */
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u_short checksum; /* Checksum over entire structure */
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EMS_mapping_context ems_saved_context;
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} EMScontext;
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/*
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* EMS physical address array, only used to pass information to and from
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* DOS
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*/
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typedef struct {
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u_short segm __attribute__ ((packed)); /* segment address inside frame */
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u_short phys __attribute__ ((packed)); /* physical page (position) */
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} EMSaddrarray;
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/*
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* EMS move memory call structure, only used to pass information to and from
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* DOS
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*/
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typedef struct {
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u_long length __attribute__ ((packed)); /* length of region */
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#define EMS_MOVE_CONV 0
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#define EMS_MOVE_EMS 1
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u_char src_type __attribute__ ((packed)); /* source type (0,1) */
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u_short src_handle __attribute__ ((packed)); /* source handle */
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u_short src_offset __attribute__ ((packed)); /* source offset */
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u_short src_seg __attribute__ ((packed)); /* source type */
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u_char dst_type __attribute__ ((packed)); /* destination type (0,1) */
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u_short dst_handle __attribute__ ((packed)); /* destination handle */
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u_short dst_offset __attribute__ ((packed)); /* destination offset */
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u_short dst_seg __attribute__ ((packed)); /* destination type */
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} EMSmovemem;
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#endif /* EMS_H */
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