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implement ioctl control channels for ems device (GEMMIS support)

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Imported-from: https://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@2601
This commit is contained in:
Sebastian Strohhäcker 2006-04-16 20:11:04 +00:00
parent 31103c160e
commit 0b6195208d
1 changed files with 82 additions and 5 deletions
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87
src/ints/ems.cpp
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@ -16,7 +16,7 @@
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
/* $Id: ems.cpp,v 1.48 2006-04-07 16:34:07 c2woody Exp $ */
/* $Id: ems.cpp,v 1.49 2006-04-16 20:11:04 c2woody Exp $ */
#include <string.h>
#include <stdlib.h>
@ -41,6 +41,7 @@
#define EMM_MAX_PHYS 4 /* 4 16kb pages in pageframe */
#define EMM_VERSION 0x40
#define GEMMIS_VERSION 0x0001 // Version 1.0
#define NULL_HANDLE 0xffff
#define NULL_PAGE 0xffff
@ -68,10 +69,14 @@
#define EMM_MOVE_OVLAPI 0x97
#define EMM_NOT_FOUND 0xa0
static Bit16u GEMMIS_seg;
class device_EMM : public DOS_Device {
public:
device_EMM(){SetName("EMMXXXX0");}
device_EMM() {
SetName("EMMXXXX0");
GEMMIS_seg=0;
}
bool Read(Bit8u * data,Bit16u * size) { return false;}
bool Write(Bit8u * data,Bit16u * size){
LOG(LOG_IOCTL,LOG_NORMAL)("EMS:Write to device");
@ -80,12 +85,82 @@ public:
bool Seek(Bit32u * pos,Bit32u type){return false;}
bool Close(){return false;}
Bit16u GetInformation(void){return 0xc080;}
bool ReadFromControlChannel(PhysPt bufptr,Bit16u size,Bit16u * retcode){return true;}
bool ReadFromControlChannel(PhysPt bufptr,Bit16u size,Bit16u * retcode);
bool WriteToControlChannel(PhysPt bufptr,Bit16u size,Bit16u * retcode){return true;}
private:
Bit8u cache;
};
bool device_EMM::ReadFromControlChannel(PhysPt bufptr,Bit16u size,Bit16u * retcode) {
Bitu subfct=mem_readb(bufptr);
switch (subfct) {
case 0x00:
if (size!=6) return false;
mem_writew(bufptr+0x00,0x0023); // ID
mem_writed(bufptr+0x02,0); // private API entry point
*retcode=6;
return true;
case 0x01: {
if (size!=6) return false;
if (GEMMIS_seg==0) GEMMIS_seg=DOS_GetMemory(0x20);
PhysPt GEMMIS_addr=PhysMake(GEMMIS_seg,0);
mem_writew(GEMMIS_addr+0x00,0x0004); // flags
mem_writew(GEMMIS_addr+0x02,0x019d); // size of this structure
mem_writew(GEMMIS_addr+0x04,GEMMIS_VERSION); // version 1.0 (provide ems information only)
mem_writed(GEMMIS_addr+0x06,0); // reserved
/* build non-EMS frames (0-0xe000) */
for (Bitu frct=0; frct<EMM_PAGEFRAME4K/4; frct++) {
mem_writeb(GEMMIS_addr+0x0a+frct*6,0x00); // frame type: NONE
mem_writeb(GEMMIS_addr+0x0b+frct*6,0xff); // owner: NONE
mem_writew(GEMMIS_addr+0x0c+frct*6,0xffff); // non-EMS frame
mem_writeb(GEMMIS_addr+0x0e+frct*6,0xff); // EMS page number (NONE)
mem_writeb(GEMMIS_addr+0x0f+frct*6,0xaa); // flags: direct mapping
}
/* build EMS page frame (0xe000-0xf000) */
for (Bitu frct=0; frct<0x10/4; frct++) {
Bitu frnr=(frct+EMM_PAGEFRAME4K/4)*6;
mem_writeb(GEMMIS_addr+0x0a+frnr,0x03); // frame type: EMS frame in 64k page
mem_writeb(GEMMIS_addr+0x0b+frnr,0xff); // owner: NONE
mem_writew(GEMMIS_addr+0x0c+frnr,0x7fff); // no logical page number
mem_writeb(GEMMIS_addr+0x0e+frnr,frct); // physical EMS page number
mem_writeb(GEMMIS_addr+0x0f+frnr,0x00); // EMS frame
}
/* build non-EMS ROM frames (0xf000-0x10000) */
for (Bitu frct=(EMM_PAGEFRAME4K+0x10)/4; frct<0xf0/4; frct++) {
mem_writeb(GEMMIS_addr+0x0a+frct*6,0x00); // frame type: NONE
mem_writeb(GEMMIS_addr+0x0b+frct*6,0xff); // owner: NONE
mem_writew(GEMMIS_addr+0x0c+frct*6,0xffff); // non-EMS frame
mem_writeb(GEMMIS_addr+0x0e+frct*6,0xff); // EMS page number (NONE)
mem_writeb(GEMMIS_addr+0x0f+frct*6,0xaa); // flags: direct mapping
}
mem_writeb(GEMMIS_addr+0x18a,0x74); // ???
mem_writeb(GEMMIS_addr+0x18b,0x00); // no UMB descriptors following
mem_writeb(GEMMIS_addr+0x18c,0x01); // 1 EMS handle info recort
mem_writew(GEMMIS_addr+0x18d,0x0000); // system handle
mem_writed(GEMMIS_addr+0x18f,0); // handle name
mem_writed(GEMMIS_addr+0x193,0); // handle name
mem_writew(GEMMIS_addr+0x197,0x0010); // system handle
mem_writed(GEMMIS_addr+0x199,0x00110000); // physical address
/* fill buffer with import structure */
mem_writed(bufptr+0x00,GEMMIS_seg<<4);
mem_writew(bufptr+0x04,GEMMIS_VERSION);
*retcode=6;
return true;
}
case 0x02:
if (size!=2) return false;
mem_writeb(bufptr+0x00,EMM_VERSION>>4); // version 4.0
mem_writew(bufptr+0x01,EMM_VERSION&0x0f);
*retcode=2;
return true;
}
return false;
}
struct EMM_Mapping {
Bit16u handle;
Bit16u page;
@ -863,7 +938,7 @@ static Bitu V86_Monitor() {
if ((rm_val<0xc0) || (rm_val>=0xe8))
E_Exit("Invalid opcode 0x0f 0x20 %x caused a protection fault!",rm_val);
Bit32u crx=CPU_GET_CRX(which);
switch (rm_val&3) {
switch (rm_val&7) {
case 0: reg_eax=crx; break;
case 1: reg_ecx=crx; break;
case 2: reg_edx=crx; break;
@ -882,7 +957,7 @@ static Bitu V86_Monitor() {
if ((rm_val<0xc0) || (rm_val>=0xe8))
E_Exit("Invalid opcode 0x0f 0x22 %x caused a protection fault!",rm_val);
Bit32u crx;
switch (rm_val&3) {
switch (rm_val&7) {
case 0: crx=reg_eax; break;
case 1: crx=reg_ecx; break;
case 2: crx=reg_edx; break;
@ -1069,6 +1144,7 @@ public:
call_vdma.Set_RealVec(0x4b);
vcpi.enabled=false;
GEMMIS_seg=0;
Section_prop * section=static_cast<Section_prop *>(configuration);
if (!section->Get_bool("ems")) return;
@ -1161,6 +1237,7 @@ public:
/* Remove ems device */
device_EMM newdev;
DOS_DelDevice(&newdev);
GEMMIS_seg=0;
/* Remove the emsname and callback hack */
char buf[32]= { 0 };