Add support for XMS memory to doscmd.

Submitted by:	Helmut F. Wirth <hfwirth@ping.at>

1 files changed, 145 insertions, 0 deletions

diff --git a/usr.bin/doscmd/xms.h b/usr.bin/doscmd/xms.h
new file mode 100644
index 0000000..14a223f
--- /dev/null
+++ b/usr.bin/doscmd/xms.h
@@ -0,0 +1,145 @@
+/*-
+ * 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 XMS_H
+#define XMS_H
+
+#define XMS_VERSION   0x0300  /* version 3.00 */
+#define XMS_REVISION  0x0100  /* driver revision 1.0 */
+
+#define NUM_HANDLES     64	/* number of available handles */
+#define FIRST_HANDLE    1	/* number of firts valid handle */
+#define PARAGRAPH       16      /* bytes in a paragraph */
+#define MAX_BLOCK_LOCKS 256	/* number of locks on a block */
+#define DEFAULT_EMM_SIZE 512 * 1024    /* default EMM size */
+ 
+/* Register AH codes for XMS functions */
+#define  XMS_GET_VERSION                	0x00
+#define  XMS_ALLOCATE_HIGH_MEMORY       	0x01
+#define  XMS_FREE_HIGH_MEMORY           	0x02
+#define  XMS_GLOBAL_ENABLE_A20          	0x03
+#define  XMS_GLOBAL_DISABLE_A20         	0x04
+#define  XMS_LOCAL_ENABLE_A20           	0x05
+#define  XMS_LOCAL_DISABLE_A20          	0x06
+#define  XMS_QUERY_A20                  	0x07
+#define  XMS_QUERY_FREE_EXTENDED_MEMORY 	0x08
+#define  XMS_ALLOCATE_EXTENDED_MEMORY   	0x09
+#define  XMS_FREE_EXTENDED_MEMORY       	0x0a
+#define  XMS_MOVE_EXTENDED_MEMORY_BLOCK 	0x0b
+#define  XMS_LOCK_EXTENDED_MEMORY_BLOCK 	0x0c
+#define  XMS_UNLOCK_EXTENDED_MEMORY_BLOCK 	0x0d
+#define  XMS_GET_EMB_HANDLE_INFORMATION 	0x0e
+#define  XMS_RESIZE_EXTENDED_MEMORY_BLOCK 	0x0f
+#define  XMS_ALLOCATE_UMB               	0x10
+#define  XMS_DEALLOCATE_UMB             	0x11
+#define  XMS_REALLOCATE_UMB			0x12
+/* New functions for values bigger than 65MB, not implented yet */
+#define  XMS_QUERY_FREE_EXTENDED_MEMORY_LARGE	0x88
+#define  XMS_ALLOCATE_EXTENDED_MEMORY_LARGE   	0x89
+#define  XMS_FREE_EXTENDED_MEMORY_LARGE       	0x8a
+
+
+/* XMS error return codes */
+#define XMS_SUCCESS			0x0
+#define XMS_NOT_IMPLEMENTED		0x80
+#define XMS_VDISK			0x81   /* If vdisk.sys is present */
+#define XMS_A20_ERROR			0x82
+#define XMS_GENERAL_ERROR		0x8e
+#define XMS_HMA_NOT_MANAGED		0x90
+#define XMS_HMA_ALREADY_USED		0x91
+#define XMS_HMA_NOT_ALLOCATED		0x93
+#define XMS_A20_STILL_ENABLED		0x94
+#define XMS_FULL			0xa0
+#define XMS_OUT_OF_HANDLES		0xa1
+#define XMS_INVALID_HANDLE		0xa2
+#define XMS_INVALID_SOURCE_HANDLE	0xa3
+#define XMS_INVALID_SOURCE_OFFSET	0xa4
+#define XMS_INVALID_DESTINATION_HANDLE	0xa5
+#define XMS_INVALID_DESTINATION_OFFSET	0xa6
+#define XMS_INVALID_LENGTH		0xa7
+#define XMS_BLOCK_NOT_LOCKED		0xaa
+#define XMS_BLOCK_IS_LOCKED		0xab
+#define XMS_BLOCK_LOCKCOUNT_OVERFLOW	0xac
+#define XMS_REQUESTED_UMB_TOO_BIG	0xb0
+#define XMS_NO_UMBS_AVAILABLE		0xb1
+#define XMS_INVALID_UMB_SEGMENT		0xb2
+
+
+/*
+ * EMM structure for data exchange with DOS caller, hence the
+ * packed format
+ */
+
+struct EMM {
+   u_long  nbytes;
+   u_short src_handle __attribute__ ((packed));
+   u_long  src_offset __attribute__ ((packed));
+   u_short dst_handle __attribute__ ((packed));
+   u_long  dst_offset __attribute__ ((packed));
+} ;
+
+/*
+ * XMS info structure, only used to pass information to and from
+ * DOS 
+ */
+
+struct XMSinfo {
+   u_char handle;				/* the handle */
+   u_char num_locks __attribute__ ((packed));   /* number of locks */
+   u_long size __attribute__ ((packed));	/* size of memory */
+   u_long phys_addr __attribute__ ((packed));   /* "physical" address */
+};
+
+/*
+ * Handle management inside the emulator for extendend memory pages, 
+ * invisible to DOS
+ */
+
+typedef struct {
+   u_long addr;		/* address inside emulator, from malloc() */
+   u_long size;		/* size in bytes */
+   u_char num_locks;	/* lock count for this handle */
+} XMS_handle;
+
+/*
+ * Managment of UMB memory paragraphs (16 bytes). UMB blocks are
+ * directly accessible by VM86 applications and lie between 0xd0000 and
+ * 0xefff0 in VM86 memory space. 
+ */
+
+struct _UMB_block {
+   u_long addr;			/* Start address of block */
+   u_long size;			/* Size in bytes */
+   struct _UMB_block *next;   
+};
+
+typedef struct _UMB_block UMB_block;
+
+#endif /* XMS_H */