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47978a5828
We add this feature together with the VMWareBackdoor class. VMWareBackdoor class is responsible for enabling the vmmouse, and then controlling it from the PS2 mouse IRQ handler.
150 lines
4.1 KiB
C++
150 lines
4.1 KiB
C++
/*
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* Copyright (c) 2020, Liav A. <liavalb@hotmail.co.il>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <AK/Assertions.h>
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#include <Kernel/Arch/i386/CPU.h>
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#include <Kernel/Devices/VMWareBackdoor.h>
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#include <Kernel/IO.h>
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#define VMWARE_CMD_GETVERSION 0x0a
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#define VMMOUSE_READ_ID 0x45414552
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#define VMMOUSE_DISABLE 0x000000f5
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#define VMMOUSE_REQUEST_RELATIVE 0x4c455252
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#define VMMOUSE_REQUEST_ABSOLUTE 0x53424152
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static VMWareBackdoor* s_vmware_backdoor;
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static bool is_initialized()
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{
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return s_vmware_backdoor != nullptr;
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}
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void VMWareBackdoor::initialize()
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{
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if (!is_initialized())
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s_vmware_backdoor = new VMWareBackdoor;
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}
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VMWareBackdoor& VMWareBackdoor::the()
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{
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ASSERT(s_vmware_backdoor != nullptr);
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return *s_vmware_backdoor;
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}
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VMWareBackdoor::VMWareBackdoor()
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{
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if (!detect_presence()) {
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kprintf("VMWare Backdoor: Not supported!\n");
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m_supported = false;
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return;
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}
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kprintf("VMWare Backdoor: Supported.\n");
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m_supported = true;
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}
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bool VMWareBackdoor::detect_presence()
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{
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VMWareCommand command;
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command.bx = ~VMWARE_MAGIC;
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command.command = VMWARE_CMD_GETVERSION;
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IO::vmware_out(command);
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if (command.bx != VMWARE_MAGIC || command.ax == 0xFFFFFFFF)
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return false;
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return true;
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}
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bool VMWareBackdoor::supported()
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{
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return m_supported;
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}
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bool VMWareBackdoor::detect_vmmouse()
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{
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if (!supported())
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return false;
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VMWareCommand command;
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command.bx = 0;
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command.command = VMMOUSE_GETVERSION;
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send(command);
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// Apparently after a VMMOUSE_GETVERSION command, we should see that EBX register = VMWARE_MAGIC
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if (command.bx != VMWARE_MAGIC || command.ax == 0xFFFFFFFF)
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return false;
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return true;
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}
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bool VMWareBackdoor::vmmouse_is_absolute()
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{
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return m_vmmouse_absolute;
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}
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void VMWareBackdoor::enable_absolute_vmmouse()
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{
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InterruptDisabler disabler;
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if (!supported() || !detect_vmmouse())
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return;
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dbgprintf("Enabling vmmouse, absolute mode\n");
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VMWareCommand command;
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// Enable vmmouse
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command.bx = VMMOUSE_READ_ID;
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command.command = VMMOUSE_COMMAND;
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send(command);
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// Status
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command.bx = 0;
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command.command = VMMOUSE_STATUS;
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send(command);
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// Read Data
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command.bx = 1;
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command.command = VMMOUSE_DATA;
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send(command);
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// Enable absolute vmmouse
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command.bx = VMMOUSE_REQUEST_ABSOLUTE;
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command.command = VMMOUSE_COMMAND;
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send(command);
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m_vmmouse_absolute = true;
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}
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void VMWareBackdoor::disable_absolute_vmmouse()
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{
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InterruptDisabler disabler;
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if (!supported())
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return;
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VMWareCommand command;
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command.bx = VMMOUSE_REQUEST_RELATIVE;
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command.command = VMMOUSE_COMMAND;
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send(command);
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m_vmmouse_absolute = false;
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}
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void VMWareBackdoor::send(VMWareCommand& command)
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{
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if (supported())
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IO::vmware_out(command);
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}
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