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/*
* QEMU Bochs-style debug console ("port E9") emulation
*
* Copyright (c) 2003-2004 Fabrice Bellard
* Copyright (c) 2008 Citrix Systems, Inc.
* Copyright (c) Intel Corporation; author: H. Peter Anvin
*
* 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 AUTHORS OR COPYRIGHT HOLDERS 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.
*/
#include "hw.h"
#include "qemu-char.h"
#include "isa.h"
#include "pc.h"
//#define DEBUG_DEBUGCON
typedef struct DebugconState {
CharDriverState *chr;
uint32_t readback;
} DebugconState;
typedef struct ISADebugconState {
ISADevice dev;
uint32_t iobase;
DebugconState state;
} ISADebugconState;
static void debugcon_ioport_write(void *opaque, uint32_t addr, uint32_t val)
{
DebugconState *s = opaque;
unsigned char ch = val;
#ifdef DEBUG_DEBUGCON
printf("debugcon: write addr=0x%04x val=0x%02x\n", addr, val);
#endif
qemu_chr_write(s->chr, &ch, 1);
}
static uint32_t debugcon_ioport_read(void *opaque, uint32_t addr)
{
DebugconState *s = opaque;
#ifdef DEBUG_DEBUGCON
printf("debugcon: read addr=0x%04x\n", addr, val);
#endif
return s->readback;
}
static void debugcon_init_core(DebugconState *s)
{
if (!s->chr) {
fprintf(stderr, "Can't create debugcon device, empty char device\n");
exit(1);
}
qemu_chr_add_handlers(s->chr, NULL, NULL, NULL, s);
}
static int debugcon_isa_initfn(ISADevice *dev)
{
ISADebugconState *isa = DO_UPCAST(ISADebugconState, dev, dev);
DebugconState *s = &isa->state;
debugcon_init_core(s);
register_ioport_write(isa->iobase, 1, 1, debugcon_ioport_write, s);
register_ioport_read(isa->iobase, 1, 1, debugcon_ioport_read, s);
return 0;
}
static ISADeviceInfo debugcon_isa_info = {
.qdev.name = "isa-debugcon",
.qdev.size = sizeof(ISADebugconState),
.init = debugcon_isa_initfn,
.qdev.props = (Property[]) {
DEFINE_PROP_HEX32("iobase", ISADebugconState, iobase, 0xe9),
DEFINE_PROP_CHR("chardev", ISADebugconState, state.chr),
DEFINE_PROP_HEX32("readback", ISADebugconState, state.readback, 0xe9),
DEFINE_PROP_END_OF_LIST(),
},
};
static void debugcon_register_devices(void)
{
isa_qdev_register(&debugcon_isa_info);
}
device_init(debugcon_register_devices)
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