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/*
* Copyright 1999-2006 by VMware, Inc.
*
* 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 COPYRIGHT HOLDER(S) OR AUTHOR(S) 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.
*
* Except as contained in this notice, the name of the copyright holder(s)
* and author(s) shall not be used in advertising or otherwise to promote
* the sale, use or other dealings in this Software without prior written
* authorization from the copyright holder(s) and author(s).
*/
/*
* vmmouse_proto.c --
*
* The communication protocol between the guest and the vmmouse
* virtual device.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "vmmouse_proto.h"
/*
*----------------------------------------------------------------------------
*
* VMMouseProtoInOut --
*
* Send a low-bandwidth basic request (16 bytes) to vmware, and return its
* reply (24 bytes).
*
* Results:
* Host-side response returned in cmd IN/OUT parameter.
*
* Side effects:
* Pokes the communication port.
*
*----------------------------------------------------------------------------
*/
static void
VMMouseProtoInOut(VMMouseProtoCmd *cmd) // IN/OUT
{
#ifdef __x86_64__
uint64_t dummy;
__asm__ __volatile__(
"pushq %%rax" "\n\t"
"movq 40(%%rax), %%rdi" "\n\t"
"movq 32(%%rax), %%rsi" "\n\t"
"movq 24(%%rax), %%rdx" "\n\t"
"movq 16(%%rax), %%rcx" "\n\t"
"movq 8(%%rax), %%rbx" "\n\t"
"movq (%%rax), %%rax" "\n\t"
"inl %%dx, %%eax" "\n\t" /* NB: There is no inq instruction */
"xchgq %%rax, (%%rsp)" "\n\t"
"movq %%rdi, 40(%%rax)" "\n\t"
"movq %%rsi, 32(%%rax)" "\n\t"
"movq %%rdx, 24(%%rax)" "\n\t"
"movq %%rcx, 16(%%rax)" "\n\t"
"movq %%rbx, 8(%%rax)" "\n\t"
"popq (%%rax)"
: "=a" (dummy)
: "0" (cmd)
/*
* vmware can modify the whole VM state without the compiler knowing
* it. So far it does not modify EFLAGS. --hpreg
*/
: "rbx", "rcx", "rdx", "rsi", "rdi", "memory"
);
#else
#ifdef __i386__
uint32_t dummy;
__asm__ __volatile__(
"pushl %%ebx" "\n\t"
"pushl %%eax" "\n\t"
"movl 20(%%eax), %%edi" "\n\t"
"movl 16(%%eax), %%esi" "\n\t"
"movl 12(%%eax), %%edx" "\n\t"
"movl 8(%%eax), %%ecx" "\n\t"
"movl 4(%%eax), %%ebx" "\n\t"
"movl (%%eax), %%eax" "\n\t"
"inl %%dx, %%eax" "\n\t"
"xchgl %%eax, (%%esp)" "\n\t"
"movl %%edi, 20(%%eax)" "\n\t"
"movl %%esi, 16(%%eax)" "\n\t"
"movl %%edx, 12(%%eax)" "\n\t"
"movl %%ecx, 8(%%eax)" "\n\t"
"movl %%ebx, 4(%%eax)" "\n\t"
"popl (%%eax)" "\n\t"
"popl %%ebx"
: "=a" (dummy)
: "0" (cmd)
/*
* vmware can modify the whole VM state without the compiler knowing
* it. So far it does not modify EFLAGS. --hpreg
*/
: "ecx", "edx", "esi", "edi", "memory"
);
#else
#error "VMMouse is only supported on x86 and x86-64."
#endif
#endif
}
/*
*-----------------------------------------------------------------------------
*
* VMMouseProto_SendCmd --
*
* Send a request (16 bytes) to vmware, and synchronously return its
* reply (24 bytes).
*
* Result:
* None
*
* Side-effects:
* None
*
*-----------------------------------------------------------------------------
*/
void
VMMouseProto_SendCmd(VMMouseProtoCmd *cmd) // IN/OUT
{
cmd->in.magic = VMMOUSE_PROTO_MAGIC;
cmd->in.port = VMMOUSE_PROTO_PORT;
VMMouseProtoInOut(cmd);
}
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