diff options
Diffstat (limited to 'OvmfPkg/QemuVideoDxe/VbeShim.asm')
| -rw-r--r-- | OvmfPkg/QemuVideoDxe/VbeShim.asm | 281 |
1 files changed, 0 insertions, 281 deletions
diff --git a/OvmfPkg/QemuVideoDxe/VbeShim.asm b/OvmfPkg/QemuVideoDxe/VbeShim.asm deleted file mode 100644 index 1d284b2641..0000000000 --- a/OvmfPkg/QemuVideoDxe/VbeShim.asm +++ /dev/null @@ -1,281 +0,0 @@ -;------------------------------------------------------------------------------
-; @file
-; A minimal Int10h stub that allows the Windows 2008 R2 SP1 UEFI guest's buggy,
-; default VGA driver to switch to 1024x768x32, on the stdvga and QXL video
-; cards of QEMU.
-;
-; Copyright (C) 2014, Red Hat, Inc.
-; Copyright (c) 2013 - 2014, Intel Corporation. All rights reserved.<BR>
-;
-; SPDX-License-Identifier: BSD-2-Clause-Patent
-;
-;------------------------------------------------------------------------------
-
-; enable this macro for debug messages
-;%define DEBUG
-
-%macro DebugLog 1
-%ifdef DEBUG
- push si
- mov si, %1
- call PrintStringSi
- pop si
-%endif
-%endmacro
-
-
-BITS 16
-ORG 0
-
-VbeInfo:
-TIMES 256 nop
-
-VbeModeInfo:
-TIMES 256 nop
-
-
-Handler:
- cmp ax, 0x4f00
- je GetInfo
- cmp ax, 0x4f01
- je GetModeInfo
- cmp ax, 0x4f02
- je SetMode
- cmp ax, 0x4f03
- je GetMode
- cmp ax, 0x4f10
- je GetPmCapabilities
- cmp ax, 0x4f15
- je ReadEdid
- cmp ah, 0x00
- je SetModeLegacy
- DebugLog StrUnknownFunction
-Hang:
- jmp Hang
-
-
-GetInfo:
- push es
- push di
- push ds
- push si
- push cx
-
- DebugLog StrEnterGetInfo
-
- ; target (es:di) set on input
- push cs
- pop ds
- mov si, VbeInfo
- ; source (ds:si) set now
-
- mov cx, 256
- cld
- rep movsb
-
- pop cx
- pop si
- pop ds
- pop di
- pop es
- jmp Success
-
-
-GetModeInfo:
- push es
- push di
- push ds
- push si
- push cx
-
- DebugLog StrEnterGetModeInfo
-
- and cx, ~0x4000 ; clear potentially set LFB bit in mode number
- cmp cx, 0x00f1
- je KnownMode1
- DebugLog StrUnknownMode
- jmp Hang
-KnownMode1:
- ; target (es:di) set on input
- push cs
- pop ds
- mov si, VbeModeInfo
- ; source (ds:si) set now
-
- mov cx, 256
- cld
- rep movsb
-
- pop cx
- pop si
- pop ds
- pop di
- pop es
- jmp Success
-
-
-%define ATT_ADDRESS_REGISTER 0x03c0
-%define VBE_DISPI_IOPORT_INDEX 0x01ce
-%define VBE_DISPI_IOPORT_DATA 0x01d0
-
-%define VBE_DISPI_INDEX_XRES 0x1
-%define VBE_DISPI_INDEX_YRES 0x2
-%define VBE_DISPI_INDEX_BPP 0x3
-%define VBE_DISPI_INDEX_ENABLE 0x4
-%define VBE_DISPI_INDEX_BANK 0x5
-%define VBE_DISPI_INDEX_VIRT_WIDTH 0x6
-%define VBE_DISPI_INDEX_VIRT_HEIGHT 0x7
-%define VBE_DISPI_INDEX_X_OFFSET 0x8
-%define VBE_DISPI_INDEX_Y_OFFSET 0x9
-
-%define VBE_DISPI_ENABLED 0x01
-%define VBE_DISPI_LFB_ENABLED 0x40
-
-%macro BochsWrite 2
- push dx
- push ax
-
- mov dx, VBE_DISPI_IOPORT_INDEX
- mov ax, %1
- out dx, ax
-
- mov dx, VBE_DISPI_IOPORT_DATA
- mov ax, %2
- out dx, ax
-
- pop ax
- pop dx
-%endmacro
-
-SetMode:
- push dx
- push ax
-
- DebugLog StrEnterSetMode
-
- cmp bx, 0x40f1
- je KnownMode2
- DebugLog StrUnknownMode
- jmp Hang
-KnownMode2:
-
- ; unblank
- mov dx, ATT_ADDRESS_REGISTER
- mov al, 0x20
- out dx, al
-
- BochsWrite VBE_DISPI_INDEX_ENABLE, 0
- BochsWrite VBE_DISPI_INDEX_BANK, 0
- BochsWrite VBE_DISPI_INDEX_X_OFFSET, 0
- BochsWrite VBE_DISPI_INDEX_Y_OFFSET, 0
- BochsWrite VBE_DISPI_INDEX_BPP, 32
- BochsWrite VBE_DISPI_INDEX_XRES, 1024
- BochsWrite VBE_DISPI_INDEX_VIRT_WIDTH, 1024
- BochsWrite VBE_DISPI_INDEX_YRES, 768
- BochsWrite VBE_DISPI_INDEX_VIRT_HEIGHT, 768
- BochsWrite VBE_DISPI_INDEX_ENABLE, VBE_DISPI_ENABLED | VBE_DISPI_LFB_ENABLED
-
- pop ax
- pop dx
- jmp Success
-
-
-GetMode:
- DebugLog StrEnterGetMode
- mov bx, 0x40f1
- jmp Success
-
-
-GetPmCapabilities:
- DebugLog StrGetPmCapabilities
- jmp Unsupported
-
-
-ReadEdid:
- DebugLog StrReadEdid
- jmp Unsupported
-
-
-SetModeLegacy:
- DebugLog StrEnterSetModeLegacy
-
- cmp al, 0x03
- je KnownMode3
- cmp al, 0x12
- je KnownMode4
- DebugLog StrUnknownMode
- jmp Hang
-KnownMode3:
- mov al, 0x30
- jmp SetModeLegacyDone
-KnownMode4:
- mov al, 0x20
-SetModeLegacyDone:
- DebugLog StrExitSuccess
- iret
-
-
-Success:
- DebugLog StrExitSuccess
- mov ax, 0x004f
- iret
-
-
-Unsupported:
- DebugLog StrExitUnsupported
- mov ax, 0x014f
- iret
-
-
-%ifdef DEBUG
-PrintStringSi:
- pusha
- push ds ; save original
- push cs
- pop ds
- mov dx, 0x0402
-PrintStringSiLoop:
- lodsb
- cmp al, 0
- je PrintStringSiDone
- out dx, al
- jmp PrintStringSiLoop
-PrintStringSiDone:
- pop ds ; restore original
- popa
- ret
-
-
-StrExitSuccess:
- db 'Exit', 0x0a, 0
-
-StrExitUnsupported:
- db 'Unsupported', 0x0a, 0
-
-StrUnknownFunction:
- db 'Unknown Function', 0x0a, 0
-
-StrEnterGetInfo:
- db 'GetInfo', 0x0a, 0
-
-StrEnterGetModeInfo:
- db 'GetModeInfo', 0x0a, 0
-
-StrEnterGetMode:
- db 'GetMode', 0x0a, 0
-
-StrEnterSetMode:
- db 'SetMode', 0x0a, 0
-
-StrEnterSetModeLegacy:
- db 'SetModeLegacy', 0x0a, 0
-
-StrUnknownMode:
- db 'Unknown Mode', 0x0a, 0
-
-StrGetPmCapabilities:
- db 'GetPmCapabilities', 0x0a, 0
-
-StrReadEdid:
- db 'ReadEdid', 0x0a, 0
-%endif
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