5873b26a82
bochs.h already not include iodev.h which reduces compilation dependences for almost all cpu and fpu files, now cpu files will not be recompiled if iodev includes was changed
152 lines
4.0 KiB
C++
152 lines
4.0 KiB
C++
/////////////////////////////////////////////////////////////////////////
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// $Id: guest2host.cc,v 1.14 2004-06-19 15:20:12 sshwarts Exp $
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/////////////////////////////////////////////////////////////////////////
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//
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// Copyright (C) 2001 MandrakeSoft S.A.
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//
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// MandrakeSoft S.A.
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// 43, rue d'Aboukir
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// 75002 Paris - France
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// http://www.linux-mandrake.com/
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// http://www.mandrakesoft.com/
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//
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// This library is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Lesser General Public
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// License as published by the Free Software Foundation; either
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// version 2 of the License, or (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public
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// License along with this library; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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#include "iodev.h"
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#define LOG_THIS bx_g2h.
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bx_g2h_c bx_g2h;
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bx_g2h_c::bx_g2h_c(void)
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{
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put("G2H");
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settype(G2HLOG);
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unsigned i;
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for (i=0; i<BX_MAX_G2H_CHANNELS; i++) {
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s.callback[i].f = NULL;
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s.callback[i].used = 0;
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}
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}
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bx_g2h_c::~bx_g2h_c(void)
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{
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// nothing for now
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BX_DEBUG(("Exit."));
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}
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void
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bx_g2h_c::init(void)
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{
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BX_DEBUG(("Init $Id: guest2host.cc,v 1.14 2004-06-19 15:20:12 sshwarts Exp $"));
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// Reserve a dword port for this interface
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for (Bit32u addr=BX_G2H_PORT; addr<=(BX_G2H_PORT+3); addr++) {
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bx_devices.register_io_read_handler(&bx_g2h,
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inp_handler, addr, "g2h");
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bx_devices.register_io_write_handler(&bx_g2h,
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outp_handler, addr, "g2h");
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}
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memset(&bx_g2h.s, 0, sizeof(bx_g2h.s));
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}
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void
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bx_g2h_c::reset(unsigned type)
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{
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}
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unsigned
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bx_g2h_c::acquire_channel(bx_g2h_callback_t f)
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{
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unsigned i;
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for (i=0; i<BX_MAX_G2H_CHANNELS; i++) {
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if (bx_g2h.s.callback[i].used==0) {
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bx_g2h.s.callback[i].f = f;
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bx_g2h.s.callback[i].used = 1;
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return(i);
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}
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}
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BX_INFO(("g2h: attempt to acquire channel: maxed out"));
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return(BX_G2H_ERROR); // No more free channels
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}
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unsigned
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bx_g2h_c::deacquire_channel(unsigned channel)
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{
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if ( (channel >= BX_MAX_G2H_CHANNELS) ||
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(bx_g2h.s.callback[channel].used==0) ) {
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BX_PANIC(("g2h: attempt to deacquire channel %u: not acquired",
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channel));
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}
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bx_g2h.s.callback[channel].used = 0;
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bx_g2h.s.callback[channel].f = NULL;
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return(0);
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}
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// static IO port read callback handler
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// redirects to non-static class handler to avoid virtual functions
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Bit32u
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bx_g2h_c::inp_handler(void *this_ptr, Bit32u addr, unsigned io_len)
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{
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UNUSED(this_ptr);
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if (addr != BX_G2H_PORT)
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BX_PANIC(("g2h: IO read not aligned on dword boundary."));
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if (io_len != 4)
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BX_PANIC(("g2h: IO read not dword."));
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BX_PANIC(("g2h: IO read not complete."));
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return(0);
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}
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void
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bx_g2h_c::outp_handler(void *this_ptr, Bit32u addr,
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Bit32u val32, unsigned io_len)
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{
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UNUSED(this_ptr);
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if (addr != BX_G2H_PORT)
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BX_PANIC(("g2h: IO write not aligned on dword boundary."));
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if (io_len != 4)
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BX_PANIC(("g2h: IO write not dword."));
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if ( (bx_g2h.s.packet_count==0) && (val32!=BX_G2H_MAGIC) ) {
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BX_INFO(("g2h: IO W: Not magic header."));
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return;
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}
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bx_g2h.s.guest_packet[bx_g2h.s.packet_count++] = val32;
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if (bx_g2h.s.packet_count >= BX_G2H_PACKET_SIZE) {
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unsigned channel;
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// Full packet received from guest. Pass on to the host code.
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channel = bx_g2h.s.guest_packet[1];
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if (channel >= BX_MAX_G2H_CHANNELS) {
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BX_PANIC(("g2h: channel (%u) out of bounds", channel));
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}
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if (bx_g2h.s.callback[channel].used==0) {
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BX_PANIC(("g2h: channel (%u) not active", channel));
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}
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bx_g2h.s.callback[channel].f(&bx_g2h.s.guest_packet);
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bx_g2h.s.packet_count = 0; // Ready for next packet
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}
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}
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