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32993977 IY |
1 | /* |
2 | * QEMU System Emulator | |
3 | * | |
4 | * Copyright (c) 2003-2008 Fabrice Bellard | |
5 | * | |
6 | * Permission is hereby granted, free of charge, to any person obtaining a copy | |
7 | * of this software and associated documentation files (the "Software"), to deal | |
8 | * in the Software without restriction, including without limitation the rights | |
9 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
10 | * copies of the Software, and to permit persons to whom the Software is | |
11 | * furnished to do so, subject to the following conditions: | |
12 | * | |
13 | * The above copyright notice and this permission notice shall be included in | |
14 | * all copies or substantial portions of the Software. | |
15 | * | |
16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
17 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
18 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
19 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
20 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
21 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN | |
22 | * THE SOFTWARE. | |
23 | */ | |
24 | /* | |
25 | * splitted out ioport related stuffs from vl.c. | |
26 | */ | |
27 | ||
28 | #include "ioport.h" | |
29 | ||
30 | /***********************************************************/ | |
31 | /* IO Port */ | |
32 | ||
33 | //#define DEBUG_UNUSED_IOPORT | |
34 | //#define DEBUG_IOPORT | |
35 | ||
36 | #ifdef DEBUG_IOPORT | |
37 | # define LOG_IOPORT(...) qemu_log_mask(CPU_LOG_IOPORT, ## __VA_ARGS__) | |
38 | #else | |
39 | # define LOG_IOPORT(...) do { } while (0) | |
40 | #endif | |
41 | ||
42 | /* XXX: use a two level table to limit memory usage */ | |
43 | ||
44 | static void *ioport_opaque[MAX_IOPORTS]; | |
45 | static IOPortReadFunc *ioport_read_table[3][MAX_IOPORTS]; | |
46 | static IOPortWriteFunc *ioport_write_table[3][MAX_IOPORTS]; | |
47 | ||
48 | static IOPortReadFunc default_ioport_readb, default_ioport_readw, default_ioport_readl; | |
49 | static IOPortWriteFunc default_ioport_writeb, default_ioport_writew, default_ioport_writel; | |
50 | ||
51 | static uint32_t ioport_read(int index, uint32_t address) | |
52 | { | |
53 | static IOPortReadFunc *default_func[3] = { | |
54 | default_ioport_readb, | |
55 | default_ioport_readw, | |
56 | default_ioport_readl | |
57 | }; | |
58 | IOPortReadFunc *func = ioport_read_table[index][address]; | |
59 | if (!func) | |
60 | func = default_func[index]; | |
61 | return func(ioport_opaque[address], address); | |
62 | } | |
63 | ||
64 | static void ioport_write(int index, uint32_t address, uint32_t data) | |
65 | { | |
66 | static IOPortWriteFunc *default_func[3] = { | |
67 | default_ioport_writeb, | |
68 | default_ioport_writew, | |
69 | default_ioport_writel | |
70 | }; | |
71 | IOPortWriteFunc *func = ioport_write_table[index][address]; | |
72 | if (!func) | |
73 | func = default_func[index]; | |
74 | func(ioport_opaque[address], address, data); | |
75 | } | |
76 | ||
77 | static uint32_t default_ioport_readb(void *opaque, uint32_t address) | |
78 | { | |
79 | #ifdef DEBUG_UNUSED_IOPORT | |
80 | fprintf(stderr, "unused inb: port=0x%04x\n", address); | |
81 | #endif | |
82 | return 0xff; | |
83 | } | |
84 | ||
85 | static void default_ioport_writeb(void *opaque, uint32_t address, uint32_t data) | |
86 | { | |
87 | #ifdef DEBUG_UNUSED_IOPORT | |
88 | fprintf(stderr, "unused outb: port=0x%04x data=0x%02x\n", address, data); | |
89 | #endif | |
90 | } | |
91 | ||
92 | /* default is to make two byte accesses */ | |
93 | static uint32_t default_ioport_readw(void *opaque, uint32_t address) | |
94 | { | |
95 | uint32_t data; | |
96 | data = ioport_read(0, address); | |
97 | address = (address + 1) & (MAX_IOPORTS - 1); | |
98 | data |= ioport_read(0, address) << 8; | |
99 | return data; | |
100 | } | |
101 | ||
102 | static void default_ioport_writew(void *opaque, uint32_t address, uint32_t data) | |
103 | { | |
104 | ioport_write(0, address, data & 0xff); | |
105 | address = (address + 1) & (MAX_IOPORTS - 1); | |
106 | ioport_write(0, address, (data >> 8) & 0xff); | |
107 | } | |
108 | ||
109 | static uint32_t default_ioport_readl(void *opaque, uint32_t address) | |
110 | { | |
111 | #ifdef DEBUG_UNUSED_IOPORT | |
112 | fprintf(stderr, "unused inl: port=0x%04x\n", address); | |
113 | #endif | |
114 | return 0xffffffff; | |
115 | } | |
116 | ||
117 | static void default_ioport_writel(void *opaque, uint32_t address, uint32_t data) | |
118 | { | |
119 | #ifdef DEBUG_UNUSED_IOPORT | |
120 | fprintf(stderr, "unused outl: port=0x%04x data=0x%02x\n", address, data); | |
121 | #endif | |
122 | } | |
123 | ||
124 | /* size is the word size in byte */ | |
125 | int register_ioport_read(int start, int length, int size, | |
126 | IOPortReadFunc *func, void *opaque) | |
127 | { | |
128 | int i, bsize; | |
129 | ||
130 | if (size == 1) { | |
131 | bsize = 0; | |
132 | } else if (size == 2) { | |
133 | bsize = 1; | |
134 | } else if (size == 4) { | |
135 | bsize = 2; | |
136 | } else { | |
137 | hw_error("register_ioport_read: invalid size"); | |
138 | return -1; | |
139 | } | |
140 | for(i = start; i < start + length; i += size) { | |
141 | ioport_read_table[bsize][i] = func; | |
142 | if (ioport_opaque[i] != NULL && ioport_opaque[i] != opaque) | |
143 | hw_error("register_ioport_read: invalid opaque"); | |
144 | ioport_opaque[i] = opaque; | |
145 | } | |
146 | return 0; | |
147 | } | |
148 | ||
149 | /* size is the word size in byte */ | |
150 | int register_ioport_write(int start, int length, int size, | |
151 | IOPortWriteFunc *func, void *opaque) | |
152 | { | |
153 | int i, bsize; | |
154 | ||
155 | if (size == 1) { | |
156 | bsize = 0; | |
157 | } else if (size == 2) { | |
158 | bsize = 1; | |
159 | } else if (size == 4) { | |
160 | bsize = 2; | |
161 | } else { | |
162 | hw_error("register_ioport_write: invalid size"); | |
163 | return -1; | |
164 | } | |
165 | for(i = start; i < start + length; i += size) { | |
166 | ioport_write_table[bsize][i] = func; | |
167 | if (ioport_opaque[i] != NULL && ioport_opaque[i] != opaque) | |
168 | hw_error("register_ioport_write: invalid opaque"); | |
169 | ioport_opaque[i] = opaque; | |
170 | } | |
171 | return 0; | |
172 | } | |
173 | ||
174 | void isa_unassign_ioport(int start, int length) | |
175 | { | |
176 | int i; | |
177 | ||
178 | for(i = start; i < start + length; i++) { | |
179 | ioport_read_table[0][i] = default_ioport_readb; | |
180 | ioport_read_table[1][i] = default_ioport_readw; | |
181 | ioport_read_table[2][i] = default_ioport_readl; | |
182 | ||
183 | ioport_write_table[0][i] = default_ioport_writeb; | |
184 | ioport_write_table[1][i] = default_ioport_writew; | |
185 | ioport_write_table[2][i] = default_ioport_writel; | |
186 | ||
187 | ioport_opaque[i] = NULL; | |
188 | } | |
189 | } | |
190 | ||
191 | /***********************************************************/ | |
192 | ||
193 | void cpu_outb(CPUState *env, int addr, int val) | |
194 | { | |
195 | LOG_IOPORT("outb: %04x %02x\n", addr, val); | |
196 | ioport_write(0, addr, val); | |
197 | #ifdef CONFIG_KQEMU | |
198 | if (env) | |
199 | env->last_io_time = cpu_get_time_fast(); | |
200 | #endif | |
201 | } | |
202 | ||
203 | void cpu_outw(CPUState *env, int addr, int val) | |
204 | { | |
205 | LOG_IOPORT("outw: %04x %04x\n", addr, val); | |
206 | ioport_write(1, addr, val); | |
207 | #ifdef CONFIG_KQEMU | |
208 | if (env) | |
209 | env->last_io_time = cpu_get_time_fast(); | |
210 | #endif | |
211 | } | |
212 | ||
213 | void cpu_outl(CPUState *env, int addr, int val) | |
214 | { | |
215 | LOG_IOPORT("outl: %04x %08x\n", addr, val); | |
216 | ioport_write(2, addr, val); | |
217 | #ifdef CONFIG_KQEMU | |
218 | if (env) | |
219 | env->last_io_time = cpu_get_time_fast(); | |
220 | #endif | |
221 | } | |
222 | ||
223 | int cpu_inb(CPUState *env, int addr) | |
224 | { | |
225 | int val; | |
226 | val = ioport_read(0, addr); | |
227 | LOG_IOPORT("inb : %04x %02x\n", addr, val); | |
228 | #ifdef CONFIG_KQEMU | |
229 | if (env) | |
230 | env->last_io_time = cpu_get_time_fast(); | |
231 | #endif | |
232 | return val; | |
233 | } | |
234 | ||
235 | int cpu_inw(CPUState *env, int addr) | |
236 | { | |
237 | int val; | |
238 | val = ioport_read(1, addr); | |
239 | LOG_IOPORT("inw : %04x %04x\n", addr, val); | |
240 | #ifdef CONFIG_KQEMU | |
241 | if (env) | |
242 | env->last_io_time = cpu_get_time_fast(); | |
243 | #endif | |
244 | return val; | |
245 | } | |
246 | ||
247 | int cpu_inl(CPUState *env, int addr) | |
248 | { | |
249 | int val; | |
250 | val = ioport_read(2, addr); | |
251 | LOG_IOPORT("inl : %04x %08x\n", addr, val); | |
252 | #ifdef CONFIG_KQEMU | |
253 | if (env) | |
254 | env->last_io_time = cpu_get_time_fast(); | |
255 | #endif | |
256 | return val; | |
257 | } | |
258 |