root / hw / debugcon.c @ af5374aa
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1 | c9f398e5 | H. Peter Anvin | /*
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2 | c9f398e5 | H. Peter Anvin | * QEMU Bochs-style debug console ("port E9") emulation
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3 | c9f398e5 | H. Peter Anvin | *
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4 | c9f398e5 | H. Peter Anvin | * Copyright (c) 2003-2004 Fabrice Bellard
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5 | c9f398e5 | H. Peter Anvin | * Copyright (c) 2008 Citrix Systems, Inc.
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6 | c9f398e5 | H. Peter Anvin | * Copyright (c) Intel Corporation; author: H. Peter Anvin
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7 | c9f398e5 | H. Peter Anvin | *
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8 | c9f398e5 | H. Peter Anvin | * Permission is hereby granted, free of charge, to any person obtaining a copy
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9 | c9f398e5 | H. Peter Anvin | * of this software and associated documentation files (the "Software"), to deal
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10 | c9f398e5 | H. Peter Anvin | * in the Software without restriction, including without limitation the rights
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11 | c9f398e5 | H. Peter Anvin | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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12 | c9f398e5 | H. Peter Anvin | * copies of the Software, and to permit persons to whom the Software is
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13 | c9f398e5 | H. Peter Anvin | * furnished to do so, subject to the following conditions:
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14 | c9f398e5 | H. Peter Anvin | *
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15 | c9f398e5 | H. Peter Anvin | * The above copyright notice and this permission notice shall be included in
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16 | c9f398e5 | H. Peter Anvin | * all copies or substantial portions of the Software.
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17 | c9f398e5 | H. Peter Anvin | *
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18 | c9f398e5 | H. Peter Anvin | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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19 | c9f398e5 | H. Peter Anvin | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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20 | c9f398e5 | H. Peter Anvin | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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21 | c9f398e5 | H. Peter Anvin | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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22 | c9f398e5 | H. Peter Anvin | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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23 | c9f398e5 | H. Peter Anvin | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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24 | c9f398e5 | H. Peter Anvin | * THE SOFTWARE.
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25 | c9f398e5 | H. Peter Anvin | */
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26 | c9f398e5 | H. Peter Anvin | |
27 | c9f398e5 | H. Peter Anvin | #include "hw.h" |
28 | c9f398e5 | H. Peter Anvin | #include "qemu-char.h" |
29 | c9f398e5 | H. Peter Anvin | #include "isa.h" |
30 | c9f398e5 | H. Peter Anvin | #include "pc.h" |
31 | c9f398e5 | H. Peter Anvin | |
32 | c9f398e5 | H. Peter Anvin | //#define DEBUG_DEBUGCON
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33 | c9f398e5 | H. Peter Anvin | |
34 | c9f398e5 | H. Peter Anvin | typedef struct DebugconState { |
35 | c9f398e5 | H. Peter Anvin | CharDriverState *chr; |
36 | c9f398e5 | H. Peter Anvin | uint32_t readback; |
37 | c9f398e5 | H. Peter Anvin | } DebugconState; |
38 | c9f398e5 | H. Peter Anvin | |
39 | c9f398e5 | H. Peter Anvin | typedef struct ISADebugconState { |
40 | c9f398e5 | H. Peter Anvin | ISADevice dev; |
41 | c9f398e5 | H. Peter Anvin | uint32_t iobase; |
42 | c9f398e5 | H. Peter Anvin | DebugconState state; |
43 | c9f398e5 | H. Peter Anvin | } ISADebugconState; |
44 | c9f398e5 | H. Peter Anvin | |
45 | c9f398e5 | H. Peter Anvin | static void debugcon_ioport_write(void *opaque, uint32_t addr, uint32_t val) |
46 | c9f398e5 | H. Peter Anvin | { |
47 | c9f398e5 | H. Peter Anvin | DebugconState *s = opaque; |
48 | c9f398e5 | H. Peter Anvin | unsigned char ch = val; |
49 | c9f398e5 | H. Peter Anvin | |
50 | c9f398e5 | H. Peter Anvin | #ifdef DEBUG_DEBUGCON
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51 | c9f398e5 | H. Peter Anvin | printf("debugcon: write addr=0x%04x val=0x%02x\n", addr, val);
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52 | c9f398e5 | H. Peter Anvin | #endif
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53 | c9f398e5 | H. Peter Anvin | |
54 | c9f398e5 | H. Peter Anvin | qemu_chr_write(s->chr, &ch, 1);
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55 | c9f398e5 | H. Peter Anvin | } |
56 | c9f398e5 | H. Peter Anvin | |
57 | c9f398e5 | H. Peter Anvin | |
58 | c9f398e5 | H. Peter Anvin | static uint32_t debugcon_ioport_read(void *opaque, uint32_t addr) |
59 | c9f398e5 | H. Peter Anvin | { |
60 | c9f398e5 | H. Peter Anvin | DebugconState *s = opaque; |
61 | c9f398e5 | H. Peter Anvin | |
62 | c9f398e5 | H. Peter Anvin | #ifdef DEBUG_DEBUGCON
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63 | 0534163f | Adam Lackorzynski | printf("debugcon: read addr=0x%04x\n", addr);
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64 | c9f398e5 | H. Peter Anvin | #endif
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65 | c9f398e5 | H. Peter Anvin | |
66 | c9f398e5 | H. Peter Anvin | return s->readback;
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67 | c9f398e5 | H. Peter Anvin | } |
68 | c9f398e5 | H. Peter Anvin | |
69 | c9f398e5 | H. Peter Anvin | static void debugcon_init_core(DebugconState *s) |
70 | c9f398e5 | H. Peter Anvin | { |
71 | c9f398e5 | H. Peter Anvin | if (!s->chr) {
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72 | c9f398e5 | H. Peter Anvin | fprintf(stderr, "Can't create debugcon device, empty char device\n");
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73 | c9f398e5 | H. Peter Anvin | exit(1);
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74 | c9f398e5 | H. Peter Anvin | } |
75 | c9f398e5 | H. Peter Anvin | |
76 | c9f398e5 | H. Peter Anvin | qemu_chr_add_handlers(s->chr, NULL, NULL, NULL, s); |
77 | c9f398e5 | H. Peter Anvin | } |
78 | c9f398e5 | H. Peter Anvin | |
79 | c9f398e5 | H. Peter Anvin | static int debugcon_isa_initfn(ISADevice *dev) |
80 | c9f398e5 | H. Peter Anvin | { |
81 | c9f398e5 | H. Peter Anvin | ISADebugconState *isa = DO_UPCAST(ISADebugconState, dev, dev); |
82 | c9f398e5 | H. Peter Anvin | DebugconState *s = &isa->state; |
83 | c9f398e5 | H. Peter Anvin | |
84 | c9f398e5 | H. Peter Anvin | debugcon_init_core(s); |
85 | c9f398e5 | H. Peter Anvin | register_ioport_write(isa->iobase, 1, 1, debugcon_ioport_write, s); |
86 | c9f398e5 | H. Peter Anvin | register_ioport_read(isa->iobase, 1, 1, debugcon_ioport_read, s); |
87 | c9f398e5 | H. Peter Anvin | return 0; |
88 | c9f398e5 | H. Peter Anvin | } |
89 | c9f398e5 | H. Peter Anvin | |
90 | c9f398e5 | H. Peter Anvin | static ISADeviceInfo debugcon_isa_info = {
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91 | c9f398e5 | H. Peter Anvin | .qdev.name = "isa-debugcon",
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92 | c9f398e5 | H. Peter Anvin | .qdev.size = sizeof(ISADebugconState),
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93 | c9f398e5 | H. Peter Anvin | .init = debugcon_isa_initfn, |
94 | c9f398e5 | H. Peter Anvin | .qdev.props = (Property[]) { |
95 | c9f398e5 | H. Peter Anvin | DEFINE_PROP_HEX32("iobase", ISADebugconState, iobase, 0xe9), |
96 | c9f398e5 | H. Peter Anvin | DEFINE_PROP_CHR("chardev", ISADebugconState, state.chr),
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97 | c9f398e5 | H. Peter Anvin | DEFINE_PROP_HEX32("readback", ISADebugconState, state.readback, 0xe9), |
98 | c9f398e5 | H. Peter Anvin | DEFINE_PROP_END_OF_LIST(), |
99 | c9f398e5 | H. Peter Anvin | }, |
100 | c9f398e5 | H. Peter Anvin | }; |
101 | c9f398e5 | H. Peter Anvin | |
102 | c9f398e5 | H. Peter Anvin | static void debugcon_register_devices(void) |
103 | c9f398e5 | H. Peter Anvin | { |
104 | c9f398e5 | H. Peter Anvin | isa_qdev_register(&debugcon_isa_info); |
105 | c9f398e5 | H. Peter Anvin | } |
106 | c9f398e5 | H. Peter Anvin | |
107 | c9f398e5 | H. Peter Anvin | device_init(debugcon_register_devices) |