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/*****************************************************************************
Copyright (c) 2023 Jaroslav Hensl <emulator@emulace.cz>
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
*****************************************************************************/
/* Communication from ring3 PM16 -> ring0 PM32 */
#include <wchar.h> /* wchar_t */
#include <string.h> /* _fmemset */
#include <stdint.h>
#include "winhack.h" /* BOOL */
#include "vmwsvxd.h"
#include "control_vxd.h"
#ifdef DBGPRINT
extern void dbg_printf( const char *s, ... );
#else
#define dbg_printf(...)
#endif
static DWORD VXD_srv = 0;
#pragma code_seg( _INIT )
BOOL VXD_load()
{
if(VXD_srv != 0)
{
return TRUE;
}
_asm{
push es
push ax
push dx
push bx
push di
xor di,di
mov es,di
mov ax, 1684H
mov bx, VMWSVXD_DEVICE_ID
int 2FH
mov word ptr [VXD_srv],di
mov word ptr [VXD_srv+2],es
pop di
pop bx
pop dx
pop ax
pop es
};
return VXD_srv != 0;
}
BOOL VXD_CreateRegion(DWORD nPages, DWORD __far *lpLAddr, DWORD __far *lpPPN, DWORD __far *lpPGBLKAddr)
{
static DWORD snPages;
static DWORD sLAddr;
static DWORD sPPN;
static DWORD sPGBLKAddr;
static uint16_t state = 0;
snPages = nPages;
if(VXD_srv != 0)
{
_asm
{
.386
push eax
push edx
push ecx
push ebx
mov edx, VMWSVXD_PM16_CREATE_REGION
mov ecx, [snPages]
call dword ptr [VXD_srv]
mov [state], ax
mov [sLAddr], edx
mov [sPPN], ecx
mov [sPGBLKAddr], ebx
pop ebx
pop ecx
pop edx
pop eax
};
if(state == 1)
{
*lpLAddr = sLAddr;
*lpPPN = sPPN;
*lpPGBLKAddr = sPGBLKAddr;
return TRUE;
}
else
{
dbg_printf("state: %X, LAddr: %lX, PPN: %lX\n", state, sLAddr, sPPN);
}
}
return FALSE;
}
BOOL VXD_FreeRegion(DWORD LAddr, DWORD PGBLKAddr)
{
static DWORD sLAddr;
static uint16_t state;
static DWORD sPGBLKAddr;
sLAddr = LAddr;
sPGBLKAddr = PGBLKAddr;
if(VXD_srv != 0)
{
_asm
{
.386
push eax
push edx
push ecx
push ebx
mov edx, VMWSVXD_PM16_DESTROY_REGION
mov ecx, [sLAddr]
mov ebx, [sPGBLKAddr]
call dword ptr [VXD_srv]
mov [state], ax
pop ebx
pop ecx
pop edx
pop eax
};
if(state == 1)
{
return TRUE;
}
}
return FALSE;
}
void VXD_zeromem(DWORD LAddr, DWORD size)
{
static DWORD sLAddr;
static DWORD ssize;
sLAddr = LAddr;
ssize = size;
if(VXD_srv != 0)
{
_asm
{
.386
push eax
push edx
push ecx
push esi
mov edx, VMWSVXD_PM16_ZEROMEM
mov esi, [sLAddr]
mov ecx, [ssize]
call dword ptr [VXD_srv]
pop esi
pop ecx
pop edx
pop eax
}
}
}
DWORD VXD_apiver()
{
static DWORD sver = 0;
if(VXD_srv != 0)
{
_asm
{
.386
push eax
push edx
push ecx
mov edx, VMWSVXD_PM16_APIVER
call dword ptr [VXD_srv]
mov [sver], ecx
pop ecx
pop edx
pop eax
}
}
return sver;
}
void CB_start()
{
if(VXD_srv != 0)
{
_asm
{
.386
push eax
push edx
mov edx, VMWSVXD_PM16_CB_START
call dword ptr [VXD_srv]
pop edx
pop eax
}
}
}
void CB_stop()
{
if(VXD_srv != 0)
{
_asm
{
.386
push eax
push edx
mov edx, VMWSVXD_PM16_CB_STOP
call dword ptr [VXD_srv]
pop edx
pop eax
}
}
}
void VXD_get_addr(DWORD __far *lpLinFB, DWORD __far *lpLinFifo, DWORD __far *lpLinFifoBounce)
{
static DWORD linFB = 0;
static DWORD linFifo = 0;
static DWORD linFifoBounce = 0;
if(VXD_srv != 0)
{
_asm
{
.386
push eax
push edx
push ecx
push esi
push edi
mov edx, VMWSVXD_PM16_GET_ADDR
call dword ptr [VXD_srv]
mov [linFB], ecx
mov [linFifo], edi
mov [linFifoBounce], esi
pop edi
pop esi
pop ecx
pop edx
pop eax
}
}
*lpLinFB = linFB;
*lpLinFifo = linFifo;
*lpLinFifoBounce = linFifoBounce;
}
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