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Add VGA BIOS modes to Tiny-X Xvesa server

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This commit is contained in:
Keith Packard 2000-10-20 00:19:51 +00:00
parent f16d5d6817
commit 8f634a6516
14 changed files with 2357 additions and 1420 deletions
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4
hw/kdrive/trident/Imakefile
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@ -1,5 +1,5 @@
XCOMM $XConsortium: Imakefile /main/10 1996/12/02 10:20:33 lehors $
XCOMM $XFree86: xc/programs/Xserver/hw/kdrive/trident/Imakefile,v 1.4 2000/09/15 07:25:12 keithp Exp $
XCOMM $XFree86: xc/programs/Xserver/hw/kdrive/trident/Imakefile,v 1.5 2000/09/19 23:49:55 keithp Exp $
KDRIVE=..
#include "../Kdrive.tmpl"
@ -7,7 +7,7 @@ SRCS = trident.c tridentdraw.c tridentcurs.c tridentstub.c
OBJS = trident.o tridentdraw.o tridentcurs.o tridentstub.o
DEFINES = -DVESA
DEFINES = -DVESA /* -DUSE_PCI*/
INCLUDES = -I. $(KDINCS) -I$(KDRIVE)/fbdev -I$(KDRIVE)/vesa

48
hw/kdrive/trident/trident.c
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@ -21,7 +21,7 @@
* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
* PERFORMANCE OF THIS SOFTWARE.
*/
/* $XFree86: xc/programs/Xserver/hw/kdrive/trident/trident.c,v 1.12 2000/09/27 20:46:36 keithp Exp $ */
/* $XFree86: xc/programs/Xserver/hw/kdrive/trident/trident.c,v 1.13 2000/10/11 06:04:40 keithp Exp $ */
#include "trident.h"
#define extern
@ -33,14 +33,32 @@
Bool
tridentCardInit (KdCardInfo *card)
{
int k;
char *pixels;
int k;
char *pixels;
TridentCardInfo *tridentc;
CARD8 r39;
tridentc = (TridentCardInfo *) xalloc (sizeof (TridentCardInfo));
if (!tridentc)
return FALSE;
iopl (3);
tridentc->cop_base = (CARD8 *) KdMapDevice (TRIDENT_COP_BASE(card),
TRIDENT_COP_SIZE(card));
tridentc->cop = (Cop *) (tridentc->cop_base + TRIDENT_COP_OFF(card));
tridentc->mmio = FALSE;
r39 = tridentReadIndex (tridentc, 0x3d4, 0x39);
if (r39 & 1)
{
tridentc->mmio = TRUE;
r39 = tridentReadIndex (tridentc, 0x3d4, 0x39);
if ((r39 & 1) == 0)
{
ErrorF ("Trident: inconsisent IO mapping values\n");
return FALSE;
}
}
#ifdef VESA
if (!vesaInitialize (card, &tridentc->vesa))
#else
@ -51,11 +69,6 @@ tridentCardInit (KdCardInfo *card)
return FALSE;
}
iopl (3);
tridentc->cop_base = (CARD8 *) KdMapDevice (TRIDENT_COP_BASE(card),
TRIDENT_COP_SIZE(card));
tridentc->cop = (Cop *) (tridentc->cop_base + TRIDENT_COP_OFF(card));
tridentc->mmio = FALSE;
#ifdef USE_PCI
tridentc->window = (CARD32 *) (tridentc->cop_base + 0x10000);
#else
@ -92,15 +105,32 @@ tridentScreenInit (KdScreenInfo *screen)
if (tridents->vesa.mapping != VESA_LINEAR)
screen->dumb = TRUE;
tridents->screen = tridents->vesa.fb;
memory = tridents->vesa.fb_size;
#else
tridents->screen = tridentc->fb.fb;
memory = (2048 + 512) * 1024;
#endif
screen_size = screen->fb[0].byteStride * screen->height;
memory = (2048 + 512) * 1024;
if (tridents->screen && memory >= screen_size + 2048)
{
memory -= 2048;
tridents->cursor_base = tridents->screen + memory - 2048;
}
else
tridents->cursor_base = 0;
memory -= screen_size;
#if 0
if (memory > screen->fb[0].byteStride)
{
screen->off_screen = tridents->screen + screen_size;
screen->off_screen_size = memory - screen_size;
}
else
{
screen->off_screen = 0;
screen->off_screen_size = 0;
}
#endif
screen->driver = tridents;
return TRUE;
}

5
hw/kdrive/trident/trident.h
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@ -21,7 +21,7 @@
* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
* PERFORMANCE OF THIS SOFTWARE.
*/
/* $XFree86: xc/programs/Xserver/hw/kdrive/trident/trident.h,v 1.6 2000/09/15 07:25:12 keithp Exp $ */
/* $XFree86: xc/programs/Xserver/hw/kdrive/trident/trident.h,v 1.7 2000/10/11 06:04:40 keithp Exp $ */
#ifndef _TRIDENT_H_
#define _TRIDENT_H_
@ -34,7 +34,6 @@
/*
* offset from ioport beginning
*/
#define USE_PCI
#ifdef USE_PCI
#define TRIDENT_COP_BASE(c) (c->attr.address[1])
@ -219,6 +218,8 @@ typedef struct _tridentScreenInfo {
#endif
CARD8 *cursor_base;
CARD8 *screen;
CARD8 *off_screen;
int off_screen_size;
TridentCursor cursor;
} TridentScreenInfo;

6
hw/kdrive/vesa/Imakefile
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@ -1,10 +1,10 @@
XCOMM $XFree86$
XCOMM $XFree86: xc/programs/Xserver/hw/kdrive/vesa/Imakefile,v 1.2 2000/09/03 05:11:22 keithp Exp $
KDRIVE=..
#include "../Kdrive.tmpl"
SRCS = vesa.c vesainit.c vbe.c
SRCS = vesa.c vesainit.c vbe.c vga.c vm86.c
OBJS = vesa.o vesainit.o vbe.o
OBJS = vesa.o vesainit.o vbe.o vga.o vm86.o
INCLUDES = -I. $(KDINCS)

25
hw/kdrive/vesa/Xvesa.man
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@ -1,4 +1,4 @@
.\" $XFree86$
.\" $XFree86: xc/programs/Xserver/hw/kdrive/vesa/Xvesa.man,v 1.2 2000/09/03 05:11:22 keithp Exp $
.TH Xvesa 1
.SH NAME
Xvesa \- VESA VBE tiny X server
@ -11,10 +11,13 @@ Xvesa \- VESA VBE tiny X server
is a generic X server for Linux on the x86 platform.
.B Xvesa
doesn't know about any particular hardware, and sets the video mode by
running the video BIOS in VM86 mode.
running the video BIOS in VM86 mode.
.B Xvesa
therefore runs untrusted code with full priviledges, and is one of the
most insecure X servers available.
.B Xvesa
uses both standard VGA BIOS modes and any modes advertised by a VESA 2.0
BIOS if available.
.B Run at your own risk.
.SH OPTIONS
In addition to the normal tiny-X server's options (to be described in
@ -28,9 +31,9 @@ specifies the VESA video mode to use. If mode
is not supported by your BIOS and hardware,
.B Xvesa
will fail, hang your system, or make your monitor explode; you are on
your own. This option is ignored if the
your own. This option overrides any
.B -screen
option was used.
options.
.TP 8
.B -listmodes
tells the server to list all supported video modes. If
@ -55,8 +58,11 @@ don't use a linear framebuffer even if one is available. You don't
want to use this option.
.TP 8
.B -swaprgb
pass RGB values in the order that works on my machine. Use this if
pass RGB values in the order that works on broken BIOSes. Use this if
the colours are wrong in PseudoColor modes.
.TP 8
.B -verbose
emit diagnostic messages during BIOS initialization and teardown.
.SH KEYBOARD
Xvesa handles the keyboard in the same manner as the
.B Xfbdev
@ -69,10 +75,17 @@ assumed to be buggy. Allowing your users to run
is a major security hole. Allowing yourself to run
.B Xvesa
is probably a mistake.
.B Xvesa
records the current BIOS mode when it starts and restores that mode on
termination; if the video card has been reprogrammed by another application,
the display will almost certainly be trashed. The alternative of saving and
restoring the complete video card state has proven unreliable on most video
cards.
.SH SEE ALSO
X(1), Xserver(1), xdm(1), xinit(1), Xfbdev(1).
.SH AUTHORS
The tiny-X server was written by Keith Packard, and the VESA driver
was added by Juliusz Chroboczek who didn't realise what he was doing
until it was too late. Tiny-X uses code from XFree86, which in turn
is based on the Sample Implementation.
is based on the Sample Implementation. Keith Packard then added support for
standard VGA BIOS modes and is especially proud of 320x200 16 color mode.

1366
hw/kdrive/vesa/vbe.c
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File diff suppressed because it is too large Load Diff

139
hw/kdrive/vesa/vbe.h
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@ -28,56 +28,6 @@ THE SOFTWARE.
#define VBE_WINDOW_READ 2
#define VBE_WINDOW_WRITE 4
#ifndef U8
#define U8 unsigned char
#define U16 unsigned short
#define U32 unsigned int
#endif
/* The whole addressable memory */
#define SYSMEM_BASE 0x00000
#define SYSMEM_SIZE 0x100000
/* Interrupt vectors and BIOS data area */
/* This is allocated privately from /dev/mem */
#define MAGICMEM_BASE 0x00000
#define MAGICMEM_SIZE 0x01000
/* The low memory, allocated privately from /dev/zero */
/* 64KB should be enough for anyone, as they used to say */
#define LOMEM_BASE 0x10000
#define LOMEM_SIZE 0x10000
/* The video memory and BIOS ROM, allocated shared from /dev/mem */
#define HIMEM_BASE 0xA0000
#define HIMEM_SIZE (SYSMEM_BASE + SYSMEM_SIZE - HIMEM_BASE)
/* The BIOS ROM */
#define ROM_BASE 0xC0000
#define ROM_SIZE 0x30000
#define STACK_SIZE 0x1000
#define POINTER_SEGMENT(ptr) (((unsigned int)ptr)>>4)
#define POINTER_OFFSET(ptr) (((unsigned int)ptr)&0x000F)
#define MAKE_POINTER(seg, off) (((((unsigned int)(seg))<<4) + (unsigned int)(off)))
#define MAKE_POINTER_1(lw) MAKE_POINTER(((lw)&0xFFFF0000)/0x10000, (lw)&0xFFFF)
#define ALLOC_FAIL ((U32)-1)
typedef struct _VbeInfoRec {
int devmem, devzero;
void *magicMem, *loMem, *hiMem;
U32 brk;
struct vm86_struct vms;
U32 ret_code, stack_base, vib_base, vmib_base, statebuffer_base, palette_scratch_base;
U8 palette_format;
int palette_wait;
int windowA_offset;
int windowB_offset;
int last_window;
int vga_palette;
} VbeInfoRec, *VbeInfoPtr;
typedef struct _VbeInfoBlock {
U8 VbeSignature[4]; /* VBE Signature */
U16 VbeVersion; /* VBE Version */
@ -134,6 +84,15 @@ typedef struct _VbeModeInfoBlock {
U8 Reserved2[206]; /* remainder of ModeInfoBlock */
} __attribute__((packed)) VbeModeInfoBlock;
typedef struct _VbeInfoRec {
U8 palette_format;
int palette_wait;
int windowA_offset;
int windowB_offset;
int window_size;
int last_window;
VbeModeInfoBlock vmib;
} VbeInfoRec, *VbeInfoPtr;
typedef struct _SupVbeInfoBlock {
U8 SupVbeSignature[7]; /* Supplemental VBE Signature */
@ -147,32 +106,58 @@ typedef struct _SupVbeInfoBlock {
U8 Reserved[221]; /* Reserved */
} __attribute__((packed)) SupVbeInfoBlock;
VbeInfoPtr VbeSetup(void);
void VbeCleanup(VbeInfoPtr vi);
VbeInfoBlock *VbeGetInfo(VbeInfoPtr vi);
VbeModeInfoBlock *VbeGetModeInfo(VbeInfoPtr vi, int mode);
int VbeSetMode(VbeInfoPtr vi, int mode, int linear);
int VbeGetMode(VbeInfoPtr vi, int *mode);
int VbeSetupStateBuffer(VbeInfoPtr vi);
int VbeSaveState(VbeInfoPtr vi);
int VbeRestoreState(VbeInfoPtr vi);
void *VbeMapFramebuffer(VbeInfoPtr vi, VbeModeInfoBlock *vmib);
int VbeUnmapFrambuffer(VbeInfoPtr vi, VbeModeInfoBlock *vmib, void *fb);
int VbeSetPalette(VbeInfoPtr vi, int first, int number, U8 *entries);
int VbeSetPaletteOptions(VbeInfoPtr vi, U8 bits, int wait);
void *VbeSetWindow(VbeInfoPtr vi, int offset, int purpose, int *size_return);
int VbeReportInfo(VbeInfoPtr, VbeInfoBlock *);
int VbeReportModeInfo(VbeInfoPtr, U16 mode, VbeModeInfoBlock *);
int
VbeGetVib (Vm86InfoPtr vi, VbeInfoBlock *vib);
int VbeDoInterrupt(VbeInfoPtr, int num);
int VbeDoInterrupt10(VbeInfoPtr vi);
int VbeIsMemory(VbeInfoPtr vi, U32 i);
U8 VbeMemory(VbeInfoPtr, U32);
U16 VbeMemoryW(VbeInfoPtr, U32);
U32 VbeMemoryL(VbeInfoPtr, U32);
void VbeWriteMemory(VbeInfoPtr, U32, U8);
void VbeWriteMemoryW(VbeInfoPtr, U32, U16);
void VbeWriteMemoryL(VbeInfoPtr, U32, U32);
int VbeAllocateMemory(VbeInfoPtr, int);
void VbeDebug(VbeInfoPtr vi);
int
VbeGetVmib (Vm86InfoPtr vi, int mode, VbeModeInfoBlock *vmib);
void
VbeReportInfo (Vm86InfoPtr vi);
int
VbeGetNmode (Vm86InfoPtr vi);
int
VbeGetModes (Vm86InfoPtr vi, VesaModePtr modes, int nmode);
int
VbeGetModeInfo(Vm86InfoPtr vi, int m, VesaModePtr mode);
VbeInfoPtr
VbeInit (Vm86InfoPtr vi);
int
VbeSetMode (Vm86InfoPtr vi, VbeInfoPtr vbe, int mode, int linear);
int
VbeGetMode(Vm86InfoPtr vi, int *mode);
void *
VbeMapFramebuffer(Vm86InfoPtr vi, VbeInfoPtr vbe, int mode, int *size);
void
VbeUnmapFramebuffer(Vm86InfoPtr vi, VbeInfoPtr vbe, int mode, void *fb);
int
VbeSetPalette(Vm86InfoPtr vi, VbeInfoPtr vbe, int first, int number, U8 *entries);
int
VbeGetPalette(Vm86InfoPtr vi, VbeInfoPtr vbe, int first, int number, U8 *entries);
int
VbeSetPaletteOptions(Vm86InfoPtr vi, VbeInfoPtr vbe, U8 bits, int wait);
void *
VbeSetWindow(Vm86InfoPtr vi, VbeInfoPtr vbe, int offset, int purpose, int *size_return);
int
VbeReportVib(Vm86InfoPtr vi, VbeInfoBlock *vib);
int
VbeReportModeInfo(Vm86InfoPtr vi, U16 mode, VbeModeInfoBlock *vmib);
int
VbeDoInterrupt10(Vm86InfoPtr vi);
#endif

896
hw/kdrive/vesa/vesa.c
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File diff suppressed because it is too large Load Diff

123
hw/kdrive/vesa/vesa.h
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@ -25,54 +25,127 @@ THE SOFTWARE.
#define _VESA_H_
#include "kdrive.h"
#include <sys/vm86.h>
#include "vbe.h"
#include "vm86.h"
#define VESA_TEXT_SAVE (64*1024)
#define MODE_SUPPORTED 0x01
#define MODE_COLOUR 0x08
#define MODE_GRAPHICS 0x10
#define MODE_VGA 0x20
#define MODE_LINEAR 0x80
#define MODE_DIRECT 0x1
#define MEMORY_TEXT 0
#define MEMORY_CGA 1
#define MEMORY_HERCULES 2
#define MEMORY_PLANAR 3
#define MEMORY_PSEUDO 4
#define MEMORY_NONCHAIN 5
#define MEMORY_DIRECT 6
#define MEMORY_YUV 7
typedef struct _VesaMode {
int mode;
VbeModeInfoBlock vmib;
int mode; /* mode number */
int vbe; /* a VBE mode */
int ModeAttributes; /* mode attributes */
int NumberOfPlanes; /* number of memory planes */
int BitsPerPixel; /* bits per pixel */
int MemoryModel; /* memory model type */
int RedMaskSize; /* size of direct color red mask in bits */
int RedFieldPosition; /* bit position of lsb of red mask */
int GreenMaskSize; /* size of direct color green mask in bits */
int GreenFieldPosition; /* bit position of lsb of green mask */
int BlueMaskSize; /* size of direct color blue mask in bits */
int BlueFieldPosition; /* bit position of lsb of blue mask */
int RsvdMaskSize; /* size of direct color reserved mask bits*/
int RsvdFieldPosition; /* bit position of lsb of reserved mask */
int DirectColorModeInfo; /* direct color mode attributes */
int XResolution; /* horizontal resolution */
int YResolution; /* vertical resolution */
int BytesPerScanLine; /* bytes per scan line */
} VesaModeRec, *VesaModePtr;
#include "vbe.h"
#include "vga.h"
typedef struct _VesaCardPriv {
VbeInfoPtr vi;
VbeInfoBlock *vib;
int vbe;
Vm86InfoPtr vi;
VesaModePtr modes;
int nmode;
char text[VESA_TEXT_SAVE];
int nmode;
int vga_palette;
int old_vbe_mode;
int old_vga_mode;
VbeInfoPtr vbeInfo;
char text[VESA_TEXT_SAVE];
} VesaCardPrivRec, *VesaCardPrivPtr;
#define VESA_LINEAR 0
#define VESA_WINDOWED 1
#define VESA_PLANAR 2
#define VESA_MONO 3
typedef struct _VesaScreenPriv {
VesaModePtr mode;
Bool shadow;
Bool rotate;
int mapping;
int origDepth;
void *fb;
void *fb;
int fb_size;
} VesaScreenPrivRec, *VesaScreenPrivPtr;
extern int vesa_video_mode;
extern Bool vesa_force_mode;
Bool vesaListModes(void);
Bool vesaInitialize(KdCardInfo *card, VesaCardPrivPtr priv);
Bool vesaCardInit(KdCardInfo *card);
Bool vesaInitialize (KdCardInfo *card, VesaCardPrivPtr priv);
Bool vesaScreenInitialize (KdScreenInfo *screen, VesaScreenPrivPtr pscr);
Bool vesaScreenInit(KdScreenInfo *screen);
Bool vesaInitScreen(ScreenPtr pScreen);
Bool vesaEnable(ScreenPtr pScreen);
void vesaDisable(ScreenPtr pScreen);
void vesaPreserve(KdCardInfo *card);
void vesaRestore(KdCardInfo *card);
void vesaCardFini(KdCardInfo *card);
void vesaScreenFini(KdScreenInfo *screen);
void vesaPutColors (ScreenPtr pScreen, int fb, int n, xColorItem *pdefs);
void vesaGetColors (ScreenPtr pScreen, int fb, int n, xColorItem *pdefs);
int vesaProcessArgument (int argc, char **argv, int i);
void
vesaListModes(void);
Bool
vesaInitialize(KdCardInfo *card, VesaCardPrivPtr priv);
Bool
vesaCardInit(KdCardInfo *card);
Bool
vesaInitialize (KdCardInfo *card, VesaCardPrivPtr priv);
Bool
vesaScreenInitialize (KdScreenInfo *screen, VesaScreenPrivPtr pscr);
Bool
vesaScreenInit(KdScreenInfo *screen);
Bool
vesaInitScreen(ScreenPtr pScreen);
Bool
vesaEnable(ScreenPtr pScreen);
void
vesaDisable(ScreenPtr pScreen);
void
vesaPreserve(KdCardInfo *card);
void
vesaRestore(KdCardInfo *card);
void
vesaCardFini(KdCardInfo *card);
void
vesaScreenFini(KdScreenInfo *screen);
void
vesaPutColors (ScreenPtr pScreen, int fb, int n, xColorItem *pdefs);
void
vesaGetColors (ScreenPtr pScreen, int fb, int n, xColorItem *pdefs);
int
vesaProcessArgument (int argc, char **argv, int i);
#endif _VESA_H_

2
hw/kdrive/vesa/vesainit.c
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@ -23,7 +23,7 @@ THE SOFTWARE.
#include "vesa.h"
KdCardFuncs vesaFuncs = {
const KdCardFuncs vesaFuncs = {
vesaCardInit, /* cardinit */
vesaScreenInit, /* scrinit */
vesaInitScreen, /* initScreen */

240
hw/kdrive/vesa/vga.c Normal file
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@ -0,0 +1,240 @@
/*
* $XFree86$
*
* Copyright © 2000 Keith Packard, member of The XFree86 Project, Inc.
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
* the above copyright notice appear in all copies and that both that
* copyright notice and this permission notice appear in supporting
* documentation, and that the name of Keith Packard not be used in
* advertising or publicity pertaining to distribution of the software without
* specific, written prior permission. Keith Packard makes no
* representations about the suitability of this software for any purpose. It
* is provided "as is" without express or implied warranty.
*
* KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
* EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
* PERFORMANCE OF THIS SOFTWARE.
*/
#include "vesa.h"
static const VesaModeRec vgaModes[] = {
{
6, 0,
MODE_SUPPORTED | MODE_GRAPHICS | MODE_VGA | MODE_LINEAR,
1, 1, MEMORY_PLANAR,
0, 0, 0, 0, 0, 0, 0, 0, 0,
640, 200, 80,
},
{
0xd, 0,
MODE_SUPPORTED | MODE_GRAPHICS | MODE_VGA | MODE_COLOUR,
4, 4, MEMORY_PLANAR,
0, 0, 0, 0, 0, 0, 0, 0, 0,
320, 200, 40,
},
{
0xe, 0,
MODE_SUPPORTED | MODE_GRAPHICS | MODE_VGA | MODE_COLOUR,
4, 4, MEMORY_PLANAR,
0, 0, 0, 0, 0, 0, 0, 0, 0,
640, 200, 80,
},
{
0x10, 0,
MODE_SUPPORTED | MODE_GRAPHICS | MODE_VGA | MODE_COLOUR,
4, 4, MEMORY_PLANAR,
0, 0, 0, 0, 0, 0, 0, 0, 0,
640, 350, 80,
},
{
0x11, 0,
MODE_SUPPORTED | MODE_GRAPHICS | MODE_VGA | MODE_LINEAR,
1, 1, MEMORY_PLANAR,
0, 0, 0, 0, 0, 0, 0, 0, 0,
640, 480, 80,
},
{
0x12, 0,
MODE_SUPPORTED | MODE_GRAPHICS | MODE_VGA | MODE_COLOUR,
4, 4, MEMORY_PLANAR,
0, 0, 0, 0, 0, 0, 0, 0, 0,
640, 480, 80,
},
{
0x13, 0,
MODE_SUPPORTED | MODE_GRAPHICS | MODE_VGA | MODE_COLOUR | MODE_LINEAR,
8, 8, MEMORY_PSEUDO,
0, 0, 0, 0, 0, 0, 0, 0, 0,
320, 200, 320,
},
};
#define NUM_VGA_MODE (sizeof vgaModes / sizeof vgaModes[0])
int
VgaGetNmode (Vm86InfoPtr vi)
{
return NUM_VGA_MODE;
}
int
VgaGetModes (Vm86InfoPtr vi, VesaModePtr mode, int nmode)
{
if (nmode > NUM_VGA_MODE)
nmode = NUM_VGA_MODE;
memcpy (mode, vgaModes, nmode * sizeof (VesaModeRec));
return nmode;
}
int
VgaSetMode(Vm86InfoPtr vi, int mode)
{
int code;
vi->vms.regs.eax = mode & 0x7f;
code = Vm86DoInterrupt (vi, 0x10);
if(code < 0)
return -1;
return 0;
}
int
VgaGetMode (Vm86InfoPtr vi, int *mode)
{
*mode = Vm86Memory (vi, 0x449);
return 0;
}
int
VgaSetWritePlaneMask(Vm86InfoPtr vi, int mask)
{
asm volatile ("outb %b0,%w1" : : "a" (2), "d" (0x3c4));
asm volatile ("outb %b0,%w1" : : "a" (mask), "d" (0x3c5));
}
int
VgaSetReadPlaneMap(Vm86InfoPtr vi, int map)
{
asm volatile ("outb %b0,%w1" : : "a" (4), "d" (0x3ce));
asm volatile ("outb %b0,%w1" : : "a" (map), "d" (0x3cf));
}
int
VgaSetPalette(Vm86InfoPtr vi, int first, int number, U8 *entries)
{
U8 *palette_scratch;
int mark;
int palette_base;
int i, j, code;
if(number == 0)
return 0;
if(first < 0 || number < 0 || first + number > 256) {
ErrorF("Cannot set %d, %d palette entries\n", first, number);
return -1;
}
mark = Vm86MarkMemory (vi);
palette_base = Vm86AllocateMemory (vi, 3 * 256);
palette_scratch = &LM(vi, palette_base);
vi->vms.regs.eax = 0x1012;
vi->vms.regs.ebx = first;
vi->vms.regs.ecx = number;
vi->vms.regs.es = POINTER_SEGMENT(palette_base);
vi->vms.regs.edx = POINTER_OFFSET(palette_base);
j = 0;
i = 0;
while (number--)
{
palette_scratch[j++] = entries[i++] >> 2;
palette_scratch[j++] = entries[i++] >> 2;
palette_scratch[j++] = entries[i++] >> 2;
i++;
}
code = Vm86DoInterrupt(vi, 0x10);
Vm86ReleaseMemory (vi, mark);
if(code < 0)
return -1;
return 0;
}
int
VgaGetPalette(Vm86InfoPtr vi, int first, int number, U8 *entries)
{
U8 *palette_scratch;
int mark;
int palette_base;
int i, j, code;
if(number == 0)
return 0;
if(first < 0 || number < 0 || first + number > 256) {
ErrorF("Cannot get %d, %d palette entries\n", first, number);
return -1;
}
mark = Vm86MarkMemory (vi);
palette_base = Vm86AllocateMemory (vi, 3 * 256);
palette_scratch = &LM(vi, palette_base);
vi->vms.regs.eax = 0x1017;
vi->vms.regs.ebx = first;
vi->vms.regs.ecx = number;
vi->vms.regs.es = POINTER_SEGMENT(palette_base);
vi->vms.regs.edx = POINTER_OFFSET(palette_base);
code = VbeDoInterrupt10(vi);
if(code < 0)
return -1;
j = 0;
i = 0;
while (number--)
{
entries[i++] = palette_scratch[j++] << 2;
entries[i++] = palette_scratch[j++] << 2;
entries[i++] = palette_scratch[j++] << 2;
entries[i++] = 0;
}
Vm86ReleaseMemory (vi, mark);
return 0;
}
#define VGA_FB(vm) ((vm) < 8 ? 0xb8000 : 0xa0000)
void *
VgaSetWindow (Vm86InfoPtr vi, int vmode, int bytes, int mode, int *size)
{
*size = 0x10000 - bytes;
return &LM(vi,VGA_FB(vmode) + bytes);
}
void *
VgaMapFramebuffer (Vm86InfoPtr vi, int vmode, int *size)
{
if (VGA_FB(vmode) == 0xa0000)
*size = 0x10000;
else
*size = 0x4000;
return &LM(vi,VGA_FB(vmode));
}
void
VgaUnmapFramebuffer (Vm86InfoPtr vi)
{
}

61
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@ -0,0 +1,61 @@
/*
* $XFree86$
*
* Copyright © 2000 Keith Packard, member of The XFree86 Project, Inc.
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
* the above copyright notice appear in all copies and that both that
* copyright notice and this permission notice appear in supporting
* documentation, and that the name of Keith Packard not be used in
* advertising or publicity pertaining to distribution of the software without
* specific, written prior permission. Keith Packard makes no
* representations about the suitability of this software for any purpose. It
* is provided "as is" without express or implied warranty.
*
* KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
* EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
* PERFORMANCE OF THIS SOFTWARE.
*/
#ifndef _VGA_H_
#define _VGA_H_
int
VgaGetNmode (Vm86InfoPtr vi);
int
VgaGetModes (Vm86InfoPtr vi, VesaModePtr mode, int nmode);
int
VgaSetMode(Vm86InfoPtr vi, int mode);
int
VgaGetMode (Vm86InfoPtr vi, int *mode);
int
VgaSetWritePlaneMask(Vm86InfoPtr vi, int mask);
int
VgaSetReadPlaneMap(Vm86InfoPtr vi, int map);
int
VgaSetPalette(Vm86InfoPtr vi, int first, int number, U8 *entries);
int
VgaGetPalette(Vm86InfoPtr vi, int first, int number, U8 *entries);
void *
VgaSetWindow (Vm86InfoPtr vi, int vmode, int bytes, int mode, int *size);
void *
VgaMapFramebuffer (Vm86InfoPtr vi, int vmode, int *size);
void
VgaUnmapFramebuffer (Vm86InfoPtr vi);
#endif /* _VGA_H_ */

697
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/*
* $XFree86$
*
* Copyright © 2000 Keith Packard, member of The XFree86 Project, Inc.
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
* the above copyright notice appear in all copies and that both that
* copyright notice and this permission notice appear in supporting
* documentation, and that the name of Keith Packard not be used in
* advertising or publicity pertaining to distribution of the software without
* specific, written prior permission. Keith Packard makes no
* representations about the suitability of this software for any purpose. It
* is provided "as is" without express or implied warranty.
*
* KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
* EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
* PERFORMANCE OF THIS SOFTWARE.
*/
/*
Copyright (c) 2000 by Juliusz Chroboczek
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.
*/
#include "vm86.h"
#define PUSHW(vi, i) \
{ vi->vms.regs.esp -= 2;\
LMW(vi,MAKE_POINTER(vi->vms.regs.ss, vi->vms.regs.esp)) = i;}
static int vm86old(struct vm86_struct *vms);
static int vm86_loop(Vm86InfoPtr vi);
static const U8 rev_ints[32] =
{ 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0x80,
};
static const U8 retcode_data[2] =
{ 0xCD, 0xFF };
Vm86InfoPtr
Vm86Setup(void)
{
int devmem = -1, devzero = -1;
void *magicMem, *loMem, *hiMem;
U32 stack_base, ret_code;
Vm86InfoPtr vi = NULL;
devmem = open("/dev/mem", O_RDWR);
if(devmem < 0) {
perror("open /dev/mem");
goto fail;
}
devzero = open("/dev/zero", O_RDWR);
if(devmem < 0) {
perror("open /dev/zero");
goto fail;
}
magicMem = mmap((void*)MAGICMEM_BASE, MAGICMEM_SIZE,
PROT_READ | PROT_WRITE | PROT_EXEC,
MAP_PRIVATE | MAP_FIXED, devmem, MAGICMEM_BASE);
if(magicMem == MAP_FAILED) {
ErrorF("Couldn't map magic memory\n");
goto fail;
}
loMem = mmap((void*)LOMEM_BASE, LOMEM_SIZE,
PROT_READ | PROT_WRITE | PROT_EXEC,
MAP_PRIVATE | MAP_FIXED, devzero, LOMEM_BASE);
if(loMem == MAP_FAILED) {
ErrorF("Couldn't map low memory\n");
munmap(magicMem, MAGICMEM_SIZE);
goto fail;
}
hiMem = mmap((void*)HIMEM_BASE, HIMEM_SIZE,
PROT_READ | PROT_WRITE | PROT_EXEC,
MAP_SHARED | MAP_FIXED,
devmem, HIMEM_BASE);
if(hiMem == MAP_FAILED) {
ErrorF("Couldn't map high memory\n");
munmap(magicMem, MAGICMEM_SIZE);
munmap(loMem, LOMEM_SIZE);
goto fail;
}
vi = xalloc(sizeof(Vm86InfoRec));
if (!vi)
goto unmapfail;
vi->magicMem = magicMem;
vi->loMem = loMem;
vi->hiMem = hiMem;
vi->brk = LOMEM_BASE;
stack_base = Vm86AllocateMemory(vi, STACK_SIZE);
if(stack_base == ALLOC_FAIL)
goto unmapfail;
ret_code = Vm86AllocateMemory(vi, sizeof(retcode_data));
if(ret_code == ALLOC_FAIL)
goto unmapfail;
vi->stack_base = stack_base;
vi->ret_code = ret_code;
memset(&vi->vms, 0, sizeof(struct vm86_struct));
vi->vms.flags = 0;
vi->vms.screen_bitmap = 0;
vi->vms.cpu_type = CPU_586;
memcpy(&vi->vms.int_revectored, rev_ints, sizeof(rev_ints));
iopl(3);
if(devmem >= 0)
close(devmem);
if(devzero >= 0)
close(devzero);
return vi;
unmapfail:
munmap(magicMem, MAGICMEM_SIZE);
munmap(loMem, LOMEM_SIZE);
munmap(hiMem, HIMEM_SIZE);
fail:
if(devmem >= 0)
close(devmem);
if(devzero >= 0)
close(devzero);
if(vi)
xfree(vi);
return NULL;
}
void
Vm86Cleanup(Vm86InfoPtr vi)
{
munmap(vi->magicMem, MAGICMEM_SIZE);
munmap(vi->loMem, LOMEM_SIZE);
munmap(vi->hiMem, HIMEM_SIZE);
xfree(vi);
}
int
Vm86DoInterrupt(Vm86InfoPtr vi, int num)
{
U16 seg, off;
int code;
if(num < 0 || num>256) {
ErrorF("Interrupt %d doesn't exist\n");
return -1;
}
seg = MMW(vi,num * 4 + 2);
off = MMW(vi,num * 4);
if(MAKE_POINTER(seg, off) < ROM_BASE ||
MAKE_POINTER(seg, off) >= ROM_BASE + ROM_SIZE) {
ErrorF("Interrupt pointer doesn't point at ROM\n");
return -1;
}
memcpy(&(LM(vi,vi->ret_code)), retcode_data, sizeof(retcode_data));
vi->vms.regs.eflags = IF_MASK | IOPL_MASK;
vi->vms.regs.ss = POINTER_SEGMENT(vi->stack_base);
vi->vms.regs.esp = STACK_SIZE;
PUSHW(vi, IF_MASK | IOPL_MASK);
PUSHW(vi, POINTER_SEGMENT(vi->ret_code));
PUSHW(vi, POINTER_OFFSET(vi->ret_code));
vi->vms.regs.cs = seg;
vi->vms.regs.eip = off;
OsBlockSignals ();
code = vm86_loop(vi);
OsReleaseSignals ();
if(code < 0) {
perror("vm86 failed");
return -1;
} else if(code != 0) {
ErrorF("vm86 returned 0x%04X\n", code);
return -1;
} else
return 0;
}
#define DEBUG_VBE 0
#if DEBUG_VBE
#define DBG(x) ErrorF x; usleep(10*1000)
#else
#define DBG(x)
#endif
static inline U8
vm86_inb(U16 port)
{
U8 value;
if (port != 0x3da)
{
DBG(("inb 0x%04x", port));
}
asm volatile ("inb %w1,%b0" : "=a" (value) : "d" (port));
if (port != 0x3da)
{
DBG((" = 0x%02x\n", value));
}
return value;
}
static inline U16
vm86_inw(U16 port)
{
U16 value;
DBG(("inw 0x%04x", port));
asm volatile ("inw %w1,%w0" : "=a" (value) : "d" (port));
DBG((" = 0x%04x\n", value));
return value;
}
static inline U32
vm86_inl(U16 port)
{
U32 value;
DBG(("inl 0x%04x", port));
asm volatile ("inl %w1,%0" : "=a" (value) : "d" (port));
DBG((" = 0x%08x\n", value));
return value;
}
static inline void
vm86_outb(U16 port, U8 value)
{
#if 0
static U8 CR;
if (port == 0x3d4)
CR = value;
if (port == 0x3d5 && CR == 0xa4)
{
DBG(("outb 0x%04x = 0x%02x (skipped)\n", port, value));
return;
}
#endif
DBG(("outb 0x%04x = 0x%02x\n", port, value));
asm volatile ("outb %b0,%w1" : : "a" (value), "d" (port));
}
static inline void
vm86_outw(U16 port, U16 value)
{
DBG(("outw 0x%04x = 0x%04x\n", port, value));
asm volatile ("outw %w0,%w1" : : "a" (value), "d" (port));
}
static inline void
vm86_outl(U16 port, U32 value)
{
DBG(("outl 0x%04x = 0x%08x\n", port, value));
asm volatile ("outl %0,%w1" : : "a" (value), "d" (port));
}
#define SEG_CS 1
#define SEG_DS 2
#define SEG_ES 3
#define SEG_SS 4
#define SEG_GS 5
#define SEG_FS 6
#define REP 1
#define REPNZ 2
#define SET_8(_x, _y) (_x) = (_x & ~0xFF) | (_y & 0xFF);
#define SET_16(_x, _y) (_x) = (_x & ~0xFFFF) | (_y & 0xFFFF);
#define INC_IP(_i) SET_16(regs->eip, (regs->eip + _i))
#define AGAIN INC_IP(1); goto again;
static int
vm86_emulate(Vm86InfoPtr vi)
{
struct vm86_regs *regs = &vi->vms.regs;
U8 opcode;
int size;
int pref_seg = 0, pref_rep = 0, pref_66 = 0, pref_67 = 0;
U32 count;
int code;
again:
if(!Vm86IsMemory(vi, MAKE_POINTER(regs->cs, regs->eip))) {
ErrorF("Trying to execute unmapped memory\n");
return -1;
}
opcode = Vm86Memory(vi, MAKE_POINTER(regs->cs, regs->eip));
switch(opcode) {
case 0x2E: pref_seg = SEG_CS; AGAIN;
case 0x3E: pref_seg = SEG_DS; AGAIN;
case 0x26: pref_seg = SEG_ES; AGAIN;
case 0x36: pref_seg = SEG_SS; AGAIN;
case 0x65: pref_seg = SEG_GS; AGAIN;
case 0x64: pref_seg = SEG_FS; AGAIN;
case 0x66: pref_66 = 1; AGAIN;
case 0x67: pref_67 = 1; AGAIN;
case 0xF2: pref_rep = REPNZ; AGAIN;
case 0xF3: pref_rep = REP; AGAIN;
case 0xEC: /* IN AL, DX */
SET_8(regs->eax, vm86_inb(regs->edx & 0xFFFF));
INC_IP(1);
break;
case 0xED: /* IN AX, DX */
if(pref_66)
regs->eax = vm86_inl(regs->edx & 0xFFFF);
else
SET_16(regs->eax, vm86_inw(regs->edx & 0xFFFF));
INC_IP(1);
break;
case 0xE4: /* IN AL, imm8 */
SET_8(regs->eax,
vm86_inb(Vm86Memory(vi, MAKE_POINTER(regs->cs, regs->eip+1))));
INC_IP(2);
break;
case 0xE5: /* IN AX, imm8 */
if(pref_66)
regs->eax =
vm86_inl(Vm86Memory(vi, MAKE_POINTER(regs->cs, regs->eip+1)));
else
SET_16(regs->eax,
vm86_inw(Vm86Memory(vi, MAKE_POINTER(regs->cs, regs->eip+1))));
INC_IP(2);
break;
case 0x6C: /* INSB */
case 0x6D: /* INSW */
if(opcode == 0x6C) {
Vm86WriteMemory(vi, MAKE_POINTER(regs->es, regs->edi),
vm86_inb(regs->edx & 0xFFFF));
size = 1;
} else if(pref_66) {
Vm86WriteMemoryL(vi, MAKE_POINTER(regs->es, regs->edi),
vm86_inl(regs->edx & 0xFFFF));
size = 4;
} else {
Vm86WriteMemoryW(vi, MAKE_POINTER(regs->es, regs->edi),
vm86_inw(regs->edx & 0xFFFF));
size = 2;
}
if(regs->eflags & (1<<10))
regs->edi -= size;
else
regs->edi += size;
if(pref_rep) {
if(pref_66) {
regs->ecx--;
if(regs->ecx != 0) {
goto again;
} else {
SET_16(regs->ecx, regs->ecx - 1);
if(regs->ecx & 0xFFFF != 0)
goto again;
}
}
}
INC_IP(1);
break;
case 0xEE: /* OUT DX, AL */
vm86_outb(regs->edx & 0xFFFF, regs->eax & 0xFF);
INC_IP(1);
break;
case 0xEF: /* OUT DX, AX */
if(pref_66)
vm86_outl(regs->edx & 0xFFFF, regs->eax);
else
vm86_outw(regs->edx & 0xFFFF, regs->eax & 0xFFFF);
INC_IP(1);
break;
case 0xE6: /* OUT imm8, AL */
vm86_outb(Vm86Memory(vi, MAKE_POINTER(regs->cs, regs->eip+1)),
regs->eax & 0xFF);
INC_IP(2);
break;
case 0xE7: /* OUT imm8, AX */
if(pref_66)
vm86_outl(Vm86Memory(vi, MAKE_POINTER(regs->cs, regs->eip+1)),
regs->eax);
else
vm86_outw(Vm86Memory(vi, MAKE_POINTER(regs->cs, regs->eip+1)),
regs->eax & 0xFFFF);
INC_IP(2);
break;
case 0x6E: /* OUTSB */
case 0x6F: /* OUTSW */
if(opcode == 0x6E) {
vm86_outb(regs->edx & 0xFFFF,
Vm86Memory(vi, MAKE_POINTER(regs->es, regs->edi)));
size = 1;
} else if(pref_66) {
vm86_outl(regs->edx & 0xFFFF,
Vm86Memory(vi, MAKE_POINTER(regs->es, regs->edi)));
size = 4;
} else {
vm86_outw(regs->edx & 0xFFFF,
Vm86Memory(vi, MAKE_POINTER(regs->es, regs->edi)));
size = 2;
}
if(regs->eflags & (1<<10))
regs->edi -= size;
else
regs->edi += size;
if(pref_rep) {
if(pref_66) {
regs->ecx--;
if(regs->ecx != 0) {
goto again;
} else {
SET_16(regs->ecx, regs->ecx - 1);
if(regs->ecx & 0xFFFF != 0)
goto again;
}
}
}
INC_IP(1);
break;
case 0x0F:
ErrorF("Hit 0F trap in VM86 code\n");
return -1;
case 0xF0:
ErrorF("Hit lock prefix in VM86 code\n");
return -1;
case 0xF4:
ErrorF("Hit HLT in VM86 code\n");
return -1;
default:
ErrorF("Unhandled GP fault in VM86 code (opcode = 0x%02X)\n",
opcode);
return -1;
}
return 0;
}
#undef SEG_CS
#undef SEG_DS
#undef SEG_ES
#undef SEG_SS
#undef SEG_GS
#undef SEG_FS
#undef REP
#undef REPNZ
#undef SET_8
#undef SET_16
#undef INC_IP
#undef AGAIN
static int
vm86_loop(Vm86InfoPtr vi)
{
int code;
while(1) {
code = vm86old(&vi->vms);
switch(VM86_TYPE(code)) {
case VM86_SIGNAL:
continue;
case VM86_UNKNOWN:
code = vm86_emulate(vi);
if(code < 0) {
Vm86Debug(vi);
return -1;
}
break;
case VM86_INTx:
if(VM86_ARG(code) == 0xFF)
return 0;
else {
PUSHW(vi, vi->vms.regs.eflags)
PUSHW(vi, vi->vms.regs.cs);
PUSHW(vi, vi->vms.regs.eip);
vi->vms.regs.cs = MMW(vi,VM86_ARG(code) * 4 + 2);
vi->vms.regs.eip = MMW(vi,VM86_ARG(code) * 4);
}
break;
case VM86_STI:
ErrorF("VM86 code enabled interrupts\n");
Vm86Debug(vi);
return -1;
default:
ErrorF("Unexpected result code 0x%X from vm86\n", code);
Vm86Debug(vi);
return -1;
}
}
}
int
Vm86IsMemory(Vm86InfoPtr vi, U32 i)
{
if(i >= MAGICMEM_BASE && i< MAGICMEM_BASE + MAGICMEM_SIZE)
return 1;
else if(i >= LOMEM_BASE && i< LOMEM_BASE + LOMEM_SIZE)
return 1;
else if(i >= HIMEM_BASE && i< HIMEM_BASE + HIMEM_SIZE)
return 1;
else
return 0;
}
U8
Vm86Memory(Vm86InfoPtr vi, U32 i)
{
if(i >= MAGICMEM_BASE && i< MAGICMEM_BASE + MAGICMEM_SIZE)
return MM(vi, i);
else if(i >= LOMEM_BASE && i< LOMEM_BASE + LOMEM_SIZE)
return LM(vi, i);
else if(i >= HIMEM_BASE && i< HIMEM_BASE + HIMEM_SIZE)
return HM(vi, i);
else {
ErrorF("Reading unmapped memory at 0x%08X\n", i);
}
}
U16
Vm86MemoryW(Vm86InfoPtr vi, U32 i)
{
if(i >= MAGICMEM_BASE && i< MAGICMEM_BASE + MAGICMEM_SIZE)
return MMW(vi, i);
else if(i >= LOMEM_BASE && i< LOMEM_BASE + LOMEM_SIZE)
return LMW(vi, i);
else if(i >= HIMEM_BASE && i< HIMEM_BASE + HIMEM_SIZE)
return HMW(vi, i);
else {
ErrorF("Reading unmapped memory at 0x%08X\n", i);
return 0;
}
}
U32
Vm86MemoryL(Vm86InfoPtr vi, U32 i)
{
if(i >= MAGICMEM_BASE && i< MAGICMEM_BASE + MAGICMEM_SIZE)
return MML(vi, i);
else if(i >= LOMEM_BASE && i< LOMEM_BASE + LOMEM_SIZE)
return LML(vi, i);
else if(i >= HIMEM_BASE && i< HIMEM_BASE + HIMEM_SIZE)
return HML(vi, i);
else {
ErrorF("Reading unmapped memory at 0x%08X\n", i);
return 0;
}
}
void
Vm86WriteMemory(Vm86InfoPtr vi, U32 i, U8 val)
{
if(i >= MAGICMEM_BASE && i< MAGICMEM_BASE + MAGICMEM_SIZE)
MM(vi, i) = val;
else if(i >= LOMEM_BASE && i< LOMEM_BASE + LOMEM_SIZE)
LM(vi, i) = val;
else if(i >= HIMEM_BASE && i< HIMEM_BASE + HIMEM_SIZE)
HM(vi, i) = val;
else {
ErrorF("Writing unmapped memory at 0x%08X\n", i);
}
}
void
Vm86WriteMemoryW(Vm86InfoPtr vi, U32 i, U16 val)
{
if(i >= MAGICMEM_BASE && i< MAGICMEM_BASE + MAGICMEM_SIZE)
MMW(vi, i) = val;
else if(i >= LOMEM_BASE && i< LOMEM_BASE + LOMEM_SIZE)
LMW(vi, i) = val;
else if(i >= HIMEM_BASE && i< HIMEM_BASE + HIMEM_SIZE)
HMW(vi, i) = val;
else {
ErrorF("Writing unmapped memory at 0x%08X\n", i);
}
}
void
Vm86WriteMemoryL(Vm86InfoPtr vi, U32 i, U32 val)
{
if(i >= MAGICMEM_BASE && i< MAGICMEM_BASE + MAGICMEM_SIZE)
MML(vi, i) = val;
else if(i >= LOMEM_BASE && i< LOMEM_BASE + LOMEM_SIZE)
LML(vi, i) = val;
else if(i >= HIMEM_BASE && i< HIMEM_BASE + HIMEM_SIZE)
HML(vi, i) = val;
else {
ErrorF("Writing unmapped memory at 0x%08X\n", i);
}
}
int
Vm86AllocateMemory(Vm86InfoPtr vi, int n)
{
int ret;
if(n<0) {
ErrorF("Asked to allocate negative amount of memory\n");
return vi->brk;
}
n = (n + 15) & ~15;
if(vi->brk + n > LOMEM_BASE + LOMEM_SIZE) {
ErrorF("Out of low memory\n");
exit(2);
}
ret = vi->brk;
vi->brk += n;
return ret;
}
int
Vm86MarkMemory (Vm86InfoPtr vi)
{
return vi->brk;
}
void
Vm86ReleaseMemory (Vm86InfoPtr vi, int mark)
{
vi->brk = mark;
}
static int
vm86old(struct vm86_struct *vm)
{
int res;
asm volatile (
"pushl %%ebx\n\t"
"movl %2, %%ebx\n\t"
"movl %1,%%eax\n\t"
"int $0x80\n\t"
"popl %%ebx"
: "=a" (res) : "n" (113), "r" (vm));
if(res < 0) {
errno = -res;
res = -1;
} else
errno = 0;
return res;
}
void
Vm86Debug(Vm86InfoPtr vi)
{
struct vm86_regs *regs = &vi->vms.regs;
int i;
ErrorF("eax=0x%08lX ebx=0x%08lX ecx=0x%08lX edx=0x%08lX\n",
regs->eax, regs->ebx, regs->ecx, regs->edx);
ErrorF("esi=0x%08lX edi=0x%08lX ebp=0x%08lX\n",
regs->esi, regs->edi, regs->ebp);
ErrorF("eip=0x%08lX esp=0x%08lX eflags=0x%08lX\n",
regs->eip, regs->esp, regs->eflags);
ErrorF("cs=0x%04lX ds=0x%04lX es=0x%04lX fs=0x%04lX gs=0x%04lX\n",
regs->cs, regs->ds, regs->es, regs->fs, regs->gs);
for(i=-7; i<8; i++) {
ErrorF(" %s%02X",
i==0?"->":"",
Vm86Memory(vi, MAKE_POINTER(regs->cs, regs->eip + i)));
}
ErrorF("\n");
}
#ifdef NOT_IN_X_SERVER
static void
ErrorF(char *f, ...)
{
va_list args;
va_start(args, f);
vfprintf(stderr, f, args);
va_end(args);
}
#endif

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hw/kdrive/vesa/vm86.h Normal file
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@ -0,0 +1,165 @@
/*
* $XFree86$
*
* Copyright © 2000 Keith Packard, member of The XFree86 Project, Inc.
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
* the above copyright notice appear in all copies and that both that
* copyright notice and this permission notice appear in supporting
* documentation, and that the name of Keith Packard not be used in
* advertising or publicity pertaining to distribution of the software without
* specific, written prior permission. Keith Packard makes no
* representations about the suitability of this software for any purpose. It
* is provided "as is" without express or implied warranty.
*
* KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
* EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
* PERFORMANCE OF THIS SOFTWARE.
*/
/*
Copyright (c) 2000 by Juliusz Chroboczek
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.
*/
#ifndef _VM86_H_
#define _VM86_H_
#include <stdlib.h>
#include <errno.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/mman.h>
#include <sys/vm86.h>
#include <sys/io.h>
#ifdef NOT_IN_X_SERVER
#include <stdio.h>
#include <stdarg.h>
#include <malloc.h>
static void ErrorF(char*, ...);
#define xalloc(a) malloc(a)
#define xcalloc(a,b) calloc(a,b)
#define xfree(a) free(a)
#else
#include "X.h"
#include "Xproto.h"
#include "Xos.h"
#include "os.h"
#endif
typedef unsigned char U8;
typedef unsigned short U16;
typedef unsigned int U32;
/* The whole addressable memory */
#define SYSMEM_BASE 0x00000
#define SYSMEM_SIZE 0x100000
/* Interrupt vectors and BIOS data area */
/* This is allocated privately from /dev/mem */
#define MAGICMEM_BASE 0x00000
#define MAGICMEM_SIZE 0x01000
/* The low memory, allocated privately from /dev/zero */
/* 64KB should be enough for anyone, as they used to say */
#define LOMEM_BASE 0x10000
#define LOMEM_SIZE 0x10000
/* The video memory and BIOS ROM, allocated shared from /dev/mem */
#define HIMEM_BASE 0xA0000
#define HIMEM_SIZE (SYSMEM_BASE + SYSMEM_SIZE - HIMEM_BASE)
/* The BIOS ROM */
#define ROM_BASE 0xC0000
#define ROM_SIZE 0x30000
#define STACK_SIZE 0x1000
#define POINTER_SEGMENT(ptr) (((unsigned int)ptr)>>4)
#define POINTER_OFFSET(ptr) (((unsigned int)ptr)&0x000F)
#define MAKE_POINTER(seg, off) (((((unsigned int)(seg))<<4) + (unsigned int)(off)))
#define MAKE_POINTER_1(lw) MAKE_POINTER(((lw)&0xFFFF0000)/0x10000, (lw)&0xFFFF)
#define ALLOC_FAIL ((U32)-1)
typedef struct _Vm86InfoRec {
void *magicMem, *loMem, *hiMem;
U32 brk;
struct vm86_struct vms;
U32 ret_code, stack_base;
} Vm86InfoRec, *Vm86InfoPtr;
#define LM(vi,i) (((char*)vi->loMem)[i-LOMEM_BASE])
#define LMW(vi,i) (*(U16*)(&LM(vi,i)))
#define LML(vi,i) (*(U32*)(&LM(vi,i)))
#define MM(vi,i) (((char*)vi->magicMem)[i-MAGICMEM_BASE])
#define MMW(vi,i) (*(U16*)(&MM(vi,i)))
#define MML(vi,i) (*(U32*)(&MM(vi,i)))
#define HM(vi,i) (((char*)vi->hiMem)[i-HIMEM_BASE])
#define HMW(vi,i) (*(U16*)(&MM(vi,i)))
#define HML(vi,i) (*(U32*)(&MM(vi,i)))
Vm86InfoPtr
Vm86Setup(void);
void
Vm86Cleanup(Vm86InfoPtr vi);
int
Vm86DoInterrupt(Vm86InfoPtr vi, int num);
int
Vm86IsMemory(Vm86InfoPtr vi, U32 i);
U8
Vm86Memory(Vm86InfoPtr, U32);
U16
Vm86MemoryW(Vm86InfoPtr, U32);
U32
Vm86MemoryL(Vm86InfoPtr, U32);
void
Vm86WriteMemory(Vm86InfoPtr, U32, U8);
void
Vm86WriteMemoryW(Vm86InfoPtr, U32, U16);
void
Vm86WriteMemoryL(Vm86InfoPtr, U32, U32);
int
Vm86AllocateMemory(Vm86InfoPtr, int);
int
Vm86MarkMemory (Vm86InfoPtr vi);
void
Vm86ReleaseMemory (Vm86InfoPtr vi, int mark);
void
Vm86Debug(Vm86InfoPtr vi);
#endif /* _VM86_H_ */