block: Add strong_runtime_opts to BlockDriver
[qemu/ar7.git] / hw / char / debugcon.c
blobe2abc61b042c4cee7036e7da9d1ea6e2284edf66
1 /*
2 * QEMU Bochs-style debug console ("port E9") emulation
4 * Copyright (c) 2003-2004 Fabrice Bellard
5 * Copyright (c) 2008 Citrix Systems, Inc.
6 * Copyright (c) Intel Corporation; author: H. Peter Anvin
8 * Permission is hereby granted, free of charge, to any person obtaining a copy
9 * of this software and associated documentation files (the "Software"), to deal
10 * in the Software without restriction, including without limitation the rights
11 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
12 * copies of the Software, and to permit persons to whom the Software is
13 * furnished to do so, subject to the following conditions:
15 * The above copyright notice and this permission notice shall be included in
16 * all copies or substantial portions of the Software.
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
19 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
20 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
21 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
22 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
23 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
24 * THE SOFTWARE.
27 #include "qemu/osdep.h"
28 #include "qapi/error.h"
29 #include "hw/hw.h"
30 #include "chardev/char-fe.h"
31 #include "hw/isa/isa.h"
33 #define TYPE_ISA_DEBUGCON_DEVICE "isa-debugcon"
34 #define ISA_DEBUGCON_DEVICE(obj) \
35 OBJECT_CHECK(ISADebugconState, (obj), TYPE_ISA_DEBUGCON_DEVICE)
37 //#define DEBUG_DEBUGCON
39 typedef struct DebugconState {
40 MemoryRegion io;
41 CharBackend chr;
42 uint32_t readback;
43 } DebugconState;
45 typedef struct ISADebugconState {
46 ISADevice parent_obj;
48 uint32_t iobase;
49 DebugconState state;
50 } ISADebugconState;
52 static void debugcon_ioport_write(void *opaque, hwaddr addr, uint64_t val,
53 unsigned width)
55 DebugconState *s = opaque;
56 unsigned char ch = val;
58 #ifdef DEBUG_DEBUGCON
59 printf(" [debugcon: write addr=0x%04" HWADDR_PRIx " val=0x%02" PRIx64 "]\n", addr, val);
60 #endif
62 /* XXX this blocks entire thread. Rewrite to use
63 * qemu_chr_fe_write and background I/O callbacks */
64 qemu_chr_fe_write_all(&s->chr, &ch, 1);
68 static uint64_t debugcon_ioport_read(void *opaque, hwaddr addr, unsigned width)
70 DebugconState *s = opaque;
72 #ifdef DEBUG_DEBUGCON
73 printf("debugcon: read addr=0x%04" HWADDR_PRIx "\n", addr);
74 #endif
76 return s->readback;
79 static const MemoryRegionOps debugcon_ops = {
80 .read = debugcon_ioport_read,
81 .write = debugcon_ioport_write,
82 .valid.min_access_size = 1,
83 .valid.max_access_size = 1,
84 .endianness = DEVICE_LITTLE_ENDIAN,
87 static void debugcon_realize_core(DebugconState *s, Error **errp)
89 if (!qemu_chr_fe_backend_connected(&s->chr)) {
90 error_setg(errp, "Can't create debugcon device, empty char device");
91 return;
94 qemu_chr_fe_set_handlers(&s->chr, NULL, NULL, NULL, NULL, s, NULL, true);
97 static void debugcon_isa_realizefn(DeviceState *dev, Error **errp)
99 ISADevice *d = ISA_DEVICE(dev);
100 ISADebugconState *isa = ISA_DEBUGCON_DEVICE(dev);
101 DebugconState *s = &isa->state;
102 Error *err = NULL;
104 debugcon_realize_core(s, &err);
105 if (err != NULL) {
106 error_propagate(errp, err);
107 return;
109 memory_region_init_io(&s->io, OBJECT(dev), &debugcon_ops, s,
110 TYPE_ISA_DEBUGCON_DEVICE, 1);
111 memory_region_add_subregion(isa_address_space_io(d),
112 isa->iobase, &s->io);
115 static Property debugcon_isa_properties[] = {
116 DEFINE_PROP_UINT32("iobase", ISADebugconState, iobase, 0xe9),
117 DEFINE_PROP_CHR("chardev", ISADebugconState, state.chr),
118 DEFINE_PROP_UINT32("readback", ISADebugconState, state.readback, 0xe9),
119 DEFINE_PROP_END_OF_LIST(),
122 static void debugcon_isa_class_initfn(ObjectClass *klass, void *data)
124 DeviceClass *dc = DEVICE_CLASS(klass);
126 dc->realize = debugcon_isa_realizefn;
127 dc->props = debugcon_isa_properties;
128 set_bit(DEVICE_CATEGORY_MISC, dc->categories);
131 static const TypeInfo debugcon_isa_info = {
132 .name = TYPE_ISA_DEBUGCON_DEVICE,
133 .parent = TYPE_ISA_DEVICE,
134 .instance_size = sizeof(ISADebugconState),
135 .class_init = debugcon_isa_class_initfn,
138 static void debugcon_register_types(void)
140 type_register_static(&debugcon_isa_info);
143 type_init(debugcon_register_types)