aboutsummaryrefslogtreecommitdiffstats
path: root/tools/ioemu/iodev/unmapped.cc
diff options
context:
space:
mode:
Diffstat (limited to 'tools/ioemu/iodev/unmapped.cc')
-rw-r--r--tools/ioemu/iodev/unmapped.cc305
1 files changed, 305 insertions, 0 deletions
diff --git a/tools/ioemu/iodev/unmapped.cc b/tools/ioemu/iodev/unmapped.cc
new file mode 100644
index 0000000000..5c7aafedb1
--- /dev/null
+++ b/tools/ioemu/iodev/unmapped.cc
@@ -0,0 +1,305 @@
+/////////////////////////////////////////////////////////////////////////
+// $Id: unmapped.cc,v 1.22 2003/08/10 17:19:49 akrisak Exp $
+/////////////////////////////////////////////////////////////////////////
+//
+// Copyright (C) 2001 MandrakeSoft S.A.
+//
+// MandrakeSoft S.A.
+// 43, rue d'Aboukir
+// 75002 Paris - France
+// http://www.linux-mandrake.com/
+// http://www.mandrakesoft.com/
+//
+// This library is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Lesser General Public
+// License as published by the Free Software Foundation; either
+// version 2 of the License, or (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+
+
+// Define BX_PLUGGABLE in files that can be compiled into plugins. For
+// platforms that require a special tag on exported symbols, BX_PLUGGABLE
+// is used to know when we are exporting symbols and when we are importing.
+#define BX_PLUGGABLE
+
+#include "bochs.h"
+
+#define LOG_THIS theUnmappedDevice->
+
+
+bx_unmapped_c *theUnmappedDevice = NULL;
+
+ int
+libunmapped_LTX_plugin_init(plugin_t *plugin, plugintype_t type, int argc, char *argv[])
+{
+ theUnmappedDevice = new bx_unmapped_c ();
+ bx_devices.pluginUnmapped = theUnmappedDevice;
+ BX_REGISTER_DEVICE_DEVMODEL(plugin, type, theUnmappedDevice, BX_PLUGIN_UNMAPPED);
+ return(0); // Success
+}
+
+ void
+libunmapped_LTX_plugin_fini(void)
+{
+}
+
+bx_unmapped_c::bx_unmapped_c(void)
+{
+ put("UNMP");
+ settype(UNMAPLOG);
+ s.port80 = 0x00;
+ s.port8e = 0x00;
+ s.shutdown = 0;
+}
+
+bx_unmapped_c::~bx_unmapped_c(void)
+{
+ // Nothing yet
+}
+
+ void
+bx_unmapped_c::init(void)
+{
+ DEV_register_default_ioread_handler(this, read_handler, "Unmapped", 7);
+ DEV_register_default_iowrite_handler(this, write_handler, "Unmapped", 7);
+}
+
+ void
+bx_unmapped_c::reset(unsigned type)
+{
+}
+
+ // static IO port read callback handler
+ // redirects to non-static class handler to avoid virtual functions
+
+ Bit32u
+bx_unmapped_c::read_handler(void *this_ptr, Bit32u address, unsigned io_len)
+{
+#if !BX_USE_UM_SMF
+ bx_unmapped_c *class_ptr = (bx_unmapped_c *) this_ptr;
+
+ return( class_ptr->read(address, io_len) );
+}
+
+ Bit32u
+bx_unmapped_c::read(Bit32u address, unsigned io_len)
+{
+#else
+ UNUSED(this_ptr);
+#endif // !BX_USE_UM_SMF
+ UNUSED(io_len);
+
+ Bit32u retval;
+
+ // This function gets called for access to any IO ports which
+ // are not mapped to any device handler. Reads return 0
+
+ if (address >= 0x02e0 && address <= 0x02ef) {
+ retval = 0;
+ goto return_from_read;
+ }
+
+ switch (address) {
+ case 0x80:
+ retval = BX_UM_THIS s.port80;
+ break;
+ case 0x8e:
+ retval = BX_UM_THIS s.port8e;
+ break;
+#if BX_PORT_E9_HACK
+ // Unused port on ISA - this can be used by the emulated code
+ // to detect it is running inside Bochs and that the debugging
+ // features are available (write 0xFF or something on unused
+ // port 0x80, then read from 0xe9, if value is 0xe9, debug
+ // output is available) (see write() for that) -- Andreas and Emmanuel
+ case 0xe9:
+ retval = 0xe9;
+ break;
+#endif
+ case 0x03df:
+ retval = 0xffffffff;
+ BX_DEBUG(("unsupported IO read from port %04x (CGA)", address));
+ break;
+ case 0x023a:
+ case 0x02f8: /* UART */
+ case 0x02f9: /* UART */
+ case 0x02fb: /* UART */
+ case 0x02fc: /* UART */
+ case 0x02fd: /* UART */
+ case 0x02ea:
+ case 0x02eb:
+ case 0x03e8:
+ case 0x03e9:
+ case 0x03ea:
+ case 0x03eb:
+ case 0x03ec:
+ case 0x03ed:
+ case 0x03f8: /* UART */
+ case 0x03f9: /* UART */
+ case 0x03fb: /* UART */
+ case 0x03fc: /* UART */
+ case 0x03fd: /* UART */
+ case 0x17c6:
+ retval = 0xffffffff;
+ BX_DEBUG(("unsupported IO read from port %04x", address));
+ break;
+ default:
+ retval = 0xffffffff;
+ }
+
+ return_from_read:
+ if (bx_dbg.unsupported_io)
+ switch (io_len) {
+ case 1:
+ retval = (Bit8u)retval;
+ BX_DEBUG(("unmapped: 8-bit read from %04x = %02x", address, retval));
+ break;
+ case 2:
+ retval = (Bit16u)retval;
+ BX_DEBUG(("unmapped: 16-bit read from %04x = %04x", address, retval));
+ break;
+ case 4:
+ BX_DEBUG(("unmapped: 32-bit read from %04x = %08x", address, retval));
+ break;
+ default:
+ BX_DEBUG(("unmapped: %d-bit read from %04x = %x", io_len * 8, address, retval));
+ }
+ return retval;
+}
+
+
+ // static IO port write callback handler
+ // redirects to non-static class handler to avoid virtual functions
+
+ void
+bx_unmapped_c::write_handler(void *this_ptr, Bit32u address, Bit32u value, unsigned io_len)
+{
+#if !BX_USE_UM_SMF
+ bx_unmapped_c *class_ptr = (bx_unmapped_c *) this_ptr;
+
+ class_ptr->write(address, value, io_len);
+}
+
+ void
+bx_unmapped_c::write(Bit32u address, Bit32u value, unsigned io_len)
+{
+#else
+ UNUSED(this_ptr);
+#endif // !BX_USE_UM_SMF
+ UNUSED(io_len);
+
+
+ // This function gets called for access to any IO ports which
+ // are not mapped to any device handler. Writes to an unmapped
+ // IO port are ignored.
+
+// ???
+
+ if (address >= 0x02e0 && address <= 0x02ef)
+ goto return_from_write;
+
+ switch (address) {
+ case 0x80: // diagnostic test port to display progress of POST
+ //BX_DEBUG(("Diagnostic port 80h: write = %02xh", (unsigned) value));
+ BX_UM_THIS s.port80 = value;
+ break;
+
+ case 0x8e: // ???
+ BX_UM_THIS s.port8e = value;
+ break;
+
+#if BX_PORT_E9_HACK
+ // This port doesn't exist on normal ISA architecture. However,
+ // we define a convention here, to display on the console of the
+ // system running Bochs, anything that is written to it. The
+ // idea is to provide debug output very early when writing
+ // BIOS or OS code for example, without having to bother with
+ // properly setting up a serial port or anything.
+ //
+ // Idea by Andreas Beck (andreas.beck@ggi-project.org)
+
+ case 0xe9:
+ putchar(value);
+ fflush(stdout);
+ break;
+#endif
+
+ case 0xed: // Dummy port used as I/O delay
+ break;
+ case 0xee: // ???
+ break;
+
+ case 0x2f2:
+ case 0x2f3:
+ case 0x2f4:
+ case 0x2f5:
+ case 0x2f6:
+ case 0x2f7:
+ case 0x3e8:
+ case 0x3e9:
+ case 0x3eb:
+ case 0x3ec:
+ case 0x3ed:
+ // BX_DEBUG(("unsupported IO write to port %04x of %02x",
+ // address, value));
+ break;
+
+ case 0x8900: // Shutdown port, could be moved in a PM device
+ // or a host <-> guest communication device
+ switch (value) {
+ case 'S': if (BX_UM_THIS s.shutdown == 0) BX_UM_THIS s.shutdown = 1; break;
+ case 'h': if (BX_UM_THIS s.shutdown == 1) BX_UM_THIS s.shutdown = 2; break;
+ case 'u': if (BX_UM_THIS s.shutdown == 2) BX_UM_THIS s.shutdown = 3; break;
+ case 't': if (BX_UM_THIS s.shutdown == 3) BX_UM_THIS s.shutdown = 4; break;
+ case 'd': if (BX_UM_THIS s.shutdown == 4) BX_UM_THIS s.shutdown = 5; break;
+ case 'o': if (BX_UM_THIS s.shutdown == 5) BX_UM_THIS s.shutdown = 6; break;
+ case 'w': if (BX_UM_THIS s.shutdown == 6) BX_UM_THIS s.shutdown = 7; break;
+ case 'n': if (BX_UM_THIS s.shutdown == 7) BX_UM_THIS s.shutdown = 8; break;
+#if BX_DEBUGGER
+ // Very handy for debugging:
+ // output 'D' to port 8900, and bochs quits to debugger
+ case 'D': bx_debug_break (); break;
+#endif
+ default : BX_UM_THIS s.shutdown = 0; break;
+ }
+ if (BX_UM_THIS s.shutdown == 8) {
+ bx_user_quit = 1;
+ LOG_THIS setonoff(LOGLEV_PANIC, ACT_FATAL);
+ BX_PANIC(("Shutdown port: shutdown requested"));
+ }
+ break;
+
+ case 0xfedc:
+ bx_dbg.debugger = (value > 0);
+ BX_DEBUG(( "DEBUGGER = %u", (unsigned) bx_dbg.debugger));
+ break;
+
+ default:
+ break;
+ }
+ return_from_write:
+ if (bx_dbg.unsupported_io)
+ switch (io_len) {
+ case 1:
+ BX_INFO(("unmapped: 8-bit write to %04x = %02x", address, value));
+ break;
+ case 2:
+ BX_INFO(("unmapped: 16-bit write to %04x = %04x", address, value));
+ break;
+ case 4:
+ BX_INFO(("unmapped: 32-bit write to %04x = %08x", address, value));
+ break;
+ default:
+ BX_INFO(("unmapped: %d-bit write to %04x = %x", io_len * 8, address, value));
+ break;
+ }
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-26 13:34:33 +0000