root / hw / vmport.c @ 9ef5c4bf
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1 | 0975c304 | ths | /*
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2 | 0975c304 | ths | * QEMU VMPort emulation
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3 | 0975c304 | ths | *
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4 | 0975c304 | ths | * Copyright (C) 2007 Herv? Poussineau
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5 | 0975c304 | ths | *
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6 | 0975c304 | ths | * Permission is hereby granted, free of charge, to any person obtaining a copy
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7 | 0975c304 | ths | * of this software and associated documentation files (the "Software"), to deal
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8 | 0975c304 | ths | * in the Software without restriction, including without limitation the rights
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9 | 0975c304 | ths | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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10 | 0975c304 | ths | * copies of the Software, and to permit persons to whom the Software is
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11 | 0975c304 | ths | * furnished to do so, subject to the following conditions:
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12 | 0975c304 | ths | *
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13 | 0975c304 | ths | * The above copyright notice and this permission notice shall be included in
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14 | 0975c304 | ths | * all copies or substantial portions of the Software.
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15 | 0975c304 | ths | *
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16 | 0975c304 | ths | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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17 | 0975c304 | ths | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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18 | 0975c304 | ths | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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19 | 0975c304 | ths | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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20 | 0975c304 | ths | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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21 | 0975c304 | ths | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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22 | 0975c304 | ths | * THE SOFTWARE.
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23 | 0975c304 | ths | */
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24 | 87ecb68b | pbrook | #include "hw.h" |
25 | 87ecb68b | pbrook | #include "isa.h" |
26 | 87ecb68b | pbrook | #include "pc.h" |
27 | 87ecb68b | pbrook | #include "sysemu.h" |
28 | 0975c304 | ths | |
29 | 61ada15d | aliguori | //#define VMPORT_DEBUG
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30 | 61ada15d | aliguori | |
31 | 0975c304 | ths | #define VMPORT_CMD_GETVERSION 0x0a |
32 | 0975c304 | ths | #define VMPORT_CMD_GETRAMSIZE 0x14 |
33 | 0975c304 | ths | |
34 | 0975c304 | ths | #define VMPORT_ENTRIES 0x2c |
35 | 0975c304 | ths | #define VMPORT_MAGIC 0x564D5868 |
36 | 0975c304 | ths | |
37 | 0975c304 | ths | typedef struct _VMPortState |
38 | 0975c304 | ths | { |
39 | 0975c304 | ths | IOPortReadFunc *func[VMPORT_ENTRIES]; |
40 | 0975c304 | ths | void *opaque[VMPORT_ENTRIES];
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41 | 0975c304 | ths | } VMPortState; |
42 | 0975c304 | ths | |
43 | 0975c304 | ths | static VMPortState port_state;
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44 | 0975c304 | ths | |
45 | 0975c304 | ths | void vmport_register(unsigned char command, IOPortReadFunc *func, void *opaque) |
46 | 0975c304 | ths | { |
47 | 0975c304 | ths | if (command >= VMPORT_ENTRIES)
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48 | 0975c304 | ths | return;
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49 | 0975c304 | ths | |
50 | 0975c304 | ths | port_state.func[command] = func; |
51 | 0975c304 | ths | port_state.opaque[command] = opaque; |
52 | 0975c304 | ths | } |
53 | 0975c304 | ths | |
54 | 0975c304 | ths | static uint32_t vmport_ioport_read(void *opaque, uint32_t addr) |
55 | 0975c304 | ths | { |
56 | 0975c304 | ths | VMPortState *s = opaque; |
57 | 26fb5e48 | aurel32 | CPUState *env = cpu_single_env; |
58 | 0975c304 | ths | unsigned char command; |
59 | 6dab28d5 | ths | uint32_t eax; |
60 | 0975c304 | ths | |
61 | 26fb5e48 | aurel32 | eax = env->regs[R_EAX]; |
62 | 0975c304 | ths | if (eax != VMPORT_MAGIC)
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63 | 0975c304 | ths | return eax;
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64 | 0975c304 | ths | |
65 | 26fb5e48 | aurel32 | command = env->regs[R_ECX]; |
66 | 0975c304 | ths | if (command >= VMPORT_ENTRIES)
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67 | 0975c304 | ths | return eax;
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68 | 0975c304 | ths | if (!s->func[command])
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69 | 0975c304 | ths | { |
70 | 61ada15d | aliguori | #ifdef VMPORT_DEBUG
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71 | 61ada15d | aliguori | fprintf(stderr, "vmport: unknown command %x\n", command);
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72 | 61ada15d | aliguori | #endif
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73 | 0975c304 | ths | return eax;
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74 | 0975c304 | ths | } |
75 | 0975c304 | ths | |
76 | 0975c304 | ths | return s->func[command](s->opaque[command], addr);
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77 | 0975c304 | ths | } |
78 | 0975c304 | ths | |
79 | e9396bde | aliguori | static void vmport_ioport_write(void *opaque, uint32_t addr, uint32_t val) |
80 | e9396bde | aliguori | { |
81 | e9396bde | aliguori | CPUState *env = cpu_single_env; |
82 | e9396bde | aliguori | |
83 | e9396bde | aliguori | env->regs[R_EAX] = vmport_ioport_read(opaque, addr); |
84 | e9396bde | aliguori | } |
85 | e9396bde | aliguori | |
86 | 0975c304 | ths | static uint32_t vmport_cmd_get_version(void *opaque, uint32_t addr) |
87 | 0975c304 | ths | { |
88 | 26fb5e48 | aurel32 | CPUState *env = cpu_single_env; |
89 | 0975c304 | ths | env->regs[R_EBX] = VMPORT_MAGIC; |
90 | 0975c304 | ths | return 6; |
91 | 0975c304 | ths | } |
92 | 0975c304 | ths | |
93 | 0975c304 | ths | static uint32_t vmport_cmd_ram_size(void *opaque, uint32_t addr) |
94 | 0975c304 | ths | { |
95 | 26fb5e48 | aurel32 | CPUState *env = cpu_single_env; |
96 | 0975c304 | ths | env->regs[R_EBX] = 0x1177;
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97 | 0975c304 | ths | return ram_size;
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98 | 0975c304 | ths | } |
99 | 0975c304 | ths | |
100 | 26fb5e48 | aurel32 | void vmport_init(void) |
101 | 0975c304 | ths | { |
102 | 0975c304 | ths | register_ioport_read(0x5658, 1, 4, vmport_ioport_read, &port_state); |
103 | e9396bde | aliguori | register_ioport_write(0x5658, 1, 4, vmport_ioport_write, &port_state); |
104 | 0975c304 | ths | |
105 | 0975c304 | ths | /* Register some generic port commands */
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106 | 26fb5e48 | aurel32 | vmport_register(VMPORT_CMD_GETVERSION, vmport_cmd_get_version, NULL);
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107 | 26fb5e48 | aurel32 | vmport_register(VMPORT_CMD_GETRAMSIZE, vmport_cmd_ram_size, NULL);
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108 | 0975c304 | ths | } |