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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: EMM.H - EMM includes for "C" code
*
* VERSION: 0.04
*
* DATE: June 14,1986
*
*******************************************************************************
* CHANGE LOG
* Date Version Description
* -------- -------- -------------------------------------------------------
* 06/14/86 Original
* 06/14/86 0.00 Changed stack frame structure to match new emmdisp.asm
* and allow byte regs access (SBP).
* 06/28/86 0.02 Name change from CEMM386 to CEMM (SBP).
* 07/06/86 0.04 Changed save area structure (SBP).
*
******************************************************************************/
#define OK 0
#define EMM_SW_MALFUNCTION 0x80
#define EMM_HW_MALFUNCTION 0x81
#define INVALID_HANDLE 0x83
#define INVALID_FUNCTION 0x84
#define NO_MORE_HANDLES 0x85
#define SAVED_PAGE_DEALLOC 0x86
#define NOT_ENOUGH_EXT_MEM 0x87
#define NOT_ENOUGH_FREE_MEM 0x88
#define ZERO_PAGES 0x89
#define LOG_PAGE_RANGE 0x8A
#define PHYS_PAGE_RANGE 0x8B
#define SAVE_AREA_FULL 0x8C
#define MAP_PREV_SAVED 0x8D
#define NO_MAP_SAVED 0x8E
#define INVALID_SUBFUNCTION 0x8F
#define FEATURE_NOT_SUPPORTED 0x91
#define NAMED_HANDLE_NOT_FOUND 0xA0
#define DUPLICATE_HANDLE_NAMES 0xA1
#define ACCESS_DENIED 0xA4
/*
* various usefull defines
*/
#define PAGE_SIZE 0x1000
#define NULL_HANDLE (struct handle_ptr *)0x0FFF
#define NULL_PAGE 0xFFFF
#define NULL_SAVE (struct save_map *)0
#define GET 0x00 /* get/set page map sub codes */
#define SET 0x01
#define GETSET 0x02
#define SIZE 0x03
#define EMM_VERSION 0x40
#define Handle_Name_Len 8
/*
* defines for INTERNAL vs EXTERNAL current_map save
*/
#define INTERNAL_SAVE (unsigned)1
#define EXTERNAL_SAVE (unsigned)0
/*
* page table structure
*/
struct pt { /* page table structure, HW defined */
long pt_entry[1024];
};
/*
* Page frame table.
* Size is dynamic, based on number of pages
* available. Allocated at intialization time. Each entry
* references 4 80386 pages.
* Note that the lower 12 bits of the page address are used
* as a link field
*/
union pft386{
unsigned long address;
struct{
unsigned short p_handle;
unsigned short high;
} words;
};
/*
* save_map
* This is an array of structures that save the
* current mapping state. Size is dynamically determined.
*/
struct save_map{
unsigned short s_handle;
unsigned short window[4];
};
/*
* handle_table
* This is an array of handle pointers. It
* is dynamically sized based on the amount of memory being
* managed.
* pft_index of NULL_PAGE means free
*/
struct handle_ptr{
unsigned short page_index; /* index of list header in emm_page */
unsigned short page_count; /* size of list in EMM pages */
};
/*
* Handle_Name
* This is an 8 character handle name.
*/
typedef char Handle_Name[Handle_Name_Len];
/*
* Handle_Dir_Entry
*
*/
struct Handle_Dir_Entry {
unsigned short Handle_Value;
Handle_Name Dir_Handle_Name;
};
/*
* register frame on stack
*
* This is the stack frame on entry to the in67 dispatcher
*/
struct reg_frame {
unsigned short rdi; /* int 67 entry registers */
unsigned short pad0;
unsigned short rsi;
unsigned short pad1;
unsigned short rbp;
unsigned short pad2;
unsigned short rsp;
unsigned short pad3;
union {
struct {
unsigned short rbx;
unsigned short pad4;
unsigned short rdx;
unsigned short pad5;
unsigned short rcx;
unsigned short pad6;
unsigned short rax;
unsigned short pad7;
} x;
struct {
unsigned char rbl;
unsigned char rbh;
unsigned short pad8;
unsigned char rdl;
unsigned char rdh;
unsigned short pad9;
unsigned char rcl;
unsigned char rch;
unsigned short padA;
unsigned char ral;
unsigned char rah;
unsigned short padB;
} h;
} hregs;
unsigned short ret_addr; /* return addr */
unsigned short rcs; /* CS segment */
unsigned short PFlag; /* protected mode flag */
unsigned short rds; /* int 67 entry DS segment */
unsigned short res; /* int 67 entry ES segment */
unsigned short rgs; /* int 67 entry GS segment */
unsigned short rfs; /* int 67 entry FS segment */
};
extern struct reg_frame far *regp;
/*
* macros to set the value of a given register
* on the stack
*/
#define setAH(xx) regp->hregs.h.rah = xx
#define setAX(xx) regp->hregs.x.rax = xx
#define setBX(xx) regp->hregs.x.rbx = xx
#define setCX(xx) regp->hregs.x.rcx = xx
#define setDX(xx) regp->hregs.x.rdx = xx
/*
* 4.0 EXTRAS
*/
/*
* Number of Physical Pages:
*
* LIM 3.2: Page Frame ==> 4 x 16k pages
* LIM 4.0: 256k to 640k ==> 24 x 16k pages plus 3.2 page frame
*/
#define EMM32_PHYS_PAGES 4
#define EMM40_PHYS_PAGES (24 + EMM32_PHYS_PAGES)
/*
* structure of mappable physical page
*/
struct mappable_page {
unsigned short page_seg; /* segment of physical page */
unsigned short physical_page; /* physical page number */
};
/* OS/E Enable/Disable defines */
#define OS_IDLE 0
#define OS_ENABLED 1
#define OS_DISABLED 2
/*
* structure of page map `register' bank
*/
struct PageBankMap {
unsigned short pbm_window;
unsigned char pbm_map[64];
};
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