reactos/drivers/video/videoprt/int10.c

   1 /*
   2  * VideoPort driver
   3  *
   4  * Copyright (C) 2002, 2003, 2004 ReactOS Team
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Library General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Library General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Library General Public
  17  * License along with this library; see the file COPYING.LIB.
  18  * If not, write to the Free Software Foundation,
  19  * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  20  *
  21  * $Id$
  22  */
  23
  24 #include "videoprt.h"
  25 #include "internal/i386/v86m.h"
  26
  27 /* PRIVATE FUNCTIONS **********************************************************/
  28
  29 VP_STATUS NTAPI
  30 IntInt10AllocateBuffer(
  31    IN PVOID Context,
  32    OUT PUSHORT Seg,
  33    OUT PUSHORT Off,
  34    IN OUT PULONG Length)
  35 {
  36    PVOID MemoryAddress;
  37    NTSTATUS Status;
  38    PKPROCESS CallingProcess;
  39    KAPC_STATE ApcState;
  40
  41    DPRINT("IntInt10AllocateBuffer\n");
  42
  43    IntAttachToCSRSS(&CallingProcess, &ApcState);
  44
  45    MemoryAddress = (PVOID)0x20000;
  46    Status = ZwAllocateVirtualMemory(NtCurrentProcess(), &MemoryAddress, 0,
  47       Length, MEM_COMMIT, PAGE_EXECUTE_READWRITE);
  48
  49    if (!NT_SUCCESS(Status))
  50    {
  51       DPRINT("- ZwAllocateVirtualMemory failed\n");
  52       IntDetachFromCSRSS(&CallingProcess, &ApcState);
  53       return ERROR_NOT_ENOUGH_MEMORY;
  54    }
  55
  56    if (MemoryAddress > (PVOID)(0x100000 - *Length))
  57    {
  58       ZwFreeVirtualMemory(NtCurrentProcess(), &MemoryAddress, Length,
  59          MEM_RELEASE);
  60       DPRINT("- Unacceptable memory allocated\n");
  61       IntDetachFromCSRSS(&CallingProcess, &ApcState);
  62       return ERROR_NOT_ENOUGH_MEMORY;
  63    }
  64
  65    *Seg = (ULONG)MemoryAddress >> 4;
  66    *Off = (ULONG)MemoryAddress & 0xF;
  67
  68    DPRINT("- Segment: %x\n", (ULONG)MemoryAddress >> 4);
  69    DPRINT("- Offset: %x\n", (ULONG)MemoryAddress & 0xF);
  70    DPRINT("- Length: %x\n", *Length);
  71
  72    IntDetachFromCSRSS(&CallingProcess, &ApcState);
  73
  74    return NO_ERROR;
  75 }
  76
  77 VP_STATUS NTAPI
  78 IntInt10FreeBuffer(
  79    IN PVOID Context,
  80    IN USHORT Seg,
  81    IN USHORT Off)
  82 {
  83    PVOID MemoryAddress = (PVOID)((Seg << 4) | Off);
  84    NTSTATUS Status;
  85    PKPROCESS CallingProcess;
  86    KAPC_STATE ApcState;
  87
  88    DPRINT("IntInt10FreeBuffer\n");
  89    DPRINT("- Segment: %x\n", Seg);
  90    DPRINT("- Offset: %x\n", Off);
  91
  92    IntAttachToCSRSS(&CallingProcess, &ApcState);
  93    Status = ZwFreeVirtualMemory(NtCurrentProcess(), &MemoryAddress, 0,
  94       MEM_RELEASE);
  95    IntDetachFromCSRSS(&CallingProcess, &ApcState);
  96
  97    return Status;
  98 }
  99
 100 VP_STATUS NTAPI
 101 IntInt10ReadMemory(
 102    IN PVOID Context,
 103    IN USHORT Seg,
 104    IN USHORT Off,
 105    OUT PVOID Buffer,
 106    IN ULONG Length)
 107 {
 108    PKPROCESS CallingProcess;
 109    KAPC_STATE ApcState;
 110
 111    DPRINT("IntInt10ReadMemory\n");
 112    DPRINT("- Segment: %x\n", Seg);
 113    DPRINT("- Offset: %x\n", Off);
 114    DPRINT("- Buffer: %x\n", Buffer);
 115    DPRINT("- Length: %x\n", Length);
 116
 117    IntAttachToCSRSS(&CallingProcess, &ApcState);
 118    RtlCopyMemory(Buffer, (PVOID)((Seg << 4) | Off), Length);
 119    IntDetachFromCSRSS(&CallingProcess, &ApcState);
 120
 121    return NO_ERROR;
 122 }
 123
 124 VP_STATUS NTAPI
 125 IntInt10WriteMemory(
 126    IN PVOID Context,
 127    IN USHORT Seg,
 128    IN USHORT Off,
 129    IN PVOID Buffer,
 130    IN ULONG Length)
 131 {
 132    PKPROCESS CallingProcess;
 133    KAPC_STATE ApcState;
 134
 135    DPRINT("IntInt10WriteMemory\n");
 136    DPRINT("- Segment: %x\n", Seg);
 137    DPRINT("- Offset: %x\n", Off);
 138    DPRINT("- Buffer: %x\n", Buffer);
 139    DPRINT("- Length: %x\n", Length);
 140
 141    IntAttachToCSRSS(&CallingProcess, &ApcState);
 142    RtlCopyMemory((PVOID)((Seg << 4) | Off), Buffer, Length);
 143    IntDetachFromCSRSS(&CallingProcess, &ApcState);
 144
 145    return NO_ERROR;
 146 }
 147
 148 VP_STATUS NTAPI
 149 IntInt10CallBios(
 150    IN PVOID Context,
 151    IN OUT PINT10_BIOS_ARGUMENTS BiosArguments)
 152 {
 153    KV86M_REGISTERS Regs;
 154    NTSTATUS Status;
 155    PKPROCESS CallingProcess;
 156    KAPC_STATE ApcState;
 157
 158    DPRINT("IntInt10CallBios\n");
 159
 160    IntAttachToCSRSS(&CallingProcess, &ApcState);
 161
 162    memset(&Regs, 0, sizeof(Regs));
 163    DPRINT("- Input register Eax: %x\n", BiosArguments->Eax);
 164    Regs.Eax = BiosArguments->Eax;
 165    DPRINT("- Input register Ebx: %x\n", BiosArguments->Ebx);
 166    Regs.Ebx = BiosArguments->Ebx;
 167    DPRINT("- Input register Ecx: %x\n", BiosArguments->Ecx);
 168    Regs.Ecx = BiosArguments->Ecx;
 169    DPRINT("- Input register Edx: %x\n", BiosArguments->Edx);
 170    Regs.Edx = BiosArguments->Edx;
 171    DPRINT("- Input register Esi: %x\n", BiosArguments->Esi);
 172    Regs.Esi = BiosArguments->Esi;
 173    DPRINT("- Input register Edi: %x\n", BiosArguments->Edi);
 174    Regs.Edi = BiosArguments->Edi;
 175    DPRINT("- Input register Ebp: %x\n", BiosArguments->Ebp);
 176    Regs.Ebp = BiosArguments->Ebp;
 177    DPRINT("- Input register SegDs: %x\n", BiosArguments->SegDs);
 178    Regs.Ds = BiosArguments->SegDs;
 179    DPRINT("- Input register SegEs: %x\n", BiosArguments->SegEs);
 180    Regs.Es = BiosArguments->SegEs;
 181    Status = Ke386CallBios(0x10, (PCONTEXT)&Regs);
 182    BiosArguments->Eax = Regs.Eax;
 183    BiosArguments->Ebx = Regs.Ebx;
 184    BiosArguments->Ecx = Regs.Ecx;
 185    BiosArguments->Edx = Regs.Edx;
 186    BiosArguments->Esi = Regs.Esi;
 187    BiosArguments->Edi = Regs.Edi;
 188    BiosArguments->Ebp = Regs.Ebp;
 189    BiosArguments->SegDs = Regs.Ds;
 190    BiosArguments->SegEs = Regs.Es;
 191
 192    IntDetachFromCSRSS(&CallingProcess, &ApcState);
 193
 194    return Status;
 195 }
 196
 197 /* PUBLIC FUNCTIONS ***********************************************************/
 198
 199 /*
 200  * @implemented
 201  */
 202
 203 VP_STATUS NTAPI
 204 VideoPortInt10(
 205    IN PVOID HwDeviceExtension,
 206    IN PVIDEO_X86_BIOS_ARGUMENTS BiosArguments)
 207 {
 208    KV86M_REGISTERS Regs;
 209    NTSTATUS Status;
 210    PKPROCESS CallingProcess;
 211    KAPC_STATE ApcState;
 212
 213    DPRINT("VideoPortInt10\n");
 214
 215    if (!CsrssInitialized)
 216    {
 217       return ERROR_INVALID_PARAMETER;
 218    }
 219
 220    IntAttachToCSRSS(&CallingProcess, &ApcState);
 221
 222    memset(&Regs, 0, sizeof(Regs));
 223    DPRINT("- Input register Eax: %x\n", BiosArguments->Eax);
 224    Regs.Eax = BiosArguments->Eax;
 225    DPRINT("- Input register Ebx: %x\n", BiosArguments->Ebx);
 226    Regs.Ebx = BiosArguments->Ebx;
 227    DPRINT("- Input register Ecx: %x\n", BiosArguments->Ecx);
 228    Regs.Ecx = BiosArguments->Ecx;
 229    DPRINT("- Input register Edx: %x\n", BiosArguments->Edx);
 230    Regs.Edx = BiosArguments->Edx;
 231    DPRINT("- Input register Esi: %x\n", BiosArguments->Esi);
 232    Regs.Esi = BiosArguments->Esi;
 233    DPRINT("- Input register Edi: %x\n", BiosArguments->Edi);
 234    Regs.Edi = BiosArguments->Edi;
 235    DPRINT("- Input register Ebp: %x\n", BiosArguments->Ebp);
 236    Regs.Ebp = BiosArguments->Ebp;
 237    Status = Ke386CallBios(0x10, (PCONTEXT)&Regs);
 238    BiosArguments->Eax = Regs.Eax;
 239    BiosArguments->Ebx = Regs.Ebx;
 240    BiosArguments->Ecx = Regs.Ecx;
 241    BiosArguments->Edx = Regs.Edx;
 242    BiosArguments->Esi = Regs.Esi;
 243    BiosArguments->Edi = Regs.Edi;
 244    BiosArguments->Ebp = Regs.Ebp;
 245
 246    IntDetachFromCSRSS(&CallingProcess, &ApcState);
 247
 248    return Status;
 249 }