1
0
mirror of https://git.FreeBSD.org/src.git synced 2024-12-23 11:18:54 +00:00
freebsd/usr.bin/doscmd/ems.h
Jonathan Lemon daf3ece326 Add support for EMS emulation to doscmd. This requires changing the
interface for callbacks to doscmd from DOS, obsoleting the instbsdi
redirector.  (redir.com replaces it)

A temporary hack is in place so the instbsdi program will (hopefully) work
in the short term.
Submitted by:	Helmut F. Wirth <hfwirth@ping.at>
1997-09-30 22:04:06 +00:00

314 lines
9.6 KiB
C

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