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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 "qemu/osdep.h" | |
29 | #include "exec/ioport.h" | |
30 | #include "trace.h" | |
31 | #include "exec/memory.h" | |
32 | #include "exec/address-spaces.h" | |
33 | ||
34 | typedef struct MemoryRegionPortioList { | |
35 | MemoryRegion mr; | |
36 | void *portio_opaque; | |
37 | MemoryRegionPortio ports[]; | |
38 | } MemoryRegionPortioList; | |
39 | ||
40 | static uint64_t unassigned_io_read(void *opaque, hwaddr addr, unsigned size) | |
41 | { | |
42 | return -1ULL; | |
43 | } | |
44 | ||
45 | static void unassigned_io_write(void *opaque, hwaddr addr, uint64_t val, | |
46 | unsigned size) | |
47 | { | |
48 | } | |
49 | ||
50 | const MemoryRegionOps unassigned_io_ops = { | |
51 | .read = unassigned_io_read, | |
52 | .write = unassigned_io_write, | |
53 | .endianness = DEVICE_NATIVE_ENDIAN, | |
54 | }; | |
55 | ||
56 | void cpu_outb(pio_addr_t addr, uint8_t val) | |
57 | { | |
58 | trace_cpu_out(addr, 'b', val); | |
59 | address_space_write(&address_space_io, addr, MEMTXATTRS_UNSPECIFIED, | |
60 | &val, 1); | |
61 | } | |
62 | ||
63 | void cpu_outw(pio_addr_t addr, uint16_t val) | |
64 | { | |
65 | uint8_t buf[2]; | |
66 | ||
67 | trace_cpu_out(addr, 'w', val); | |
68 | stw_p(buf, val); | |
69 | address_space_write(&address_space_io, addr, MEMTXATTRS_UNSPECIFIED, | |
70 | buf, 2); | |
71 | } | |
72 | ||
73 | void cpu_outl(pio_addr_t addr, uint32_t val) | |
74 | { | |
75 | uint8_t buf[4]; | |
76 | ||
77 | trace_cpu_out(addr, 'l', val); | |
78 | stl_p(buf, val); | |
79 | address_space_write(&address_space_io, addr, MEMTXATTRS_UNSPECIFIED, | |
80 | buf, 4); | |
81 | } | |
82 | ||
83 | uint8_t cpu_inb(pio_addr_t addr) | |
84 | { | |
85 | uint8_t val; | |
86 | ||
87 | address_space_read(&address_space_io, addr, MEMTXATTRS_UNSPECIFIED, | |
88 | &val, 1); | |
89 | trace_cpu_in(addr, 'b', val); | |
90 | return val; | |
91 | } | |
92 | ||
93 | uint16_t cpu_inw(pio_addr_t addr) | |
94 | { | |
95 | uint8_t buf[2]; | |
96 | uint16_t val; | |
97 | ||
98 | address_space_read(&address_space_io, addr, MEMTXATTRS_UNSPECIFIED, buf, 2); | |
99 | val = lduw_p(buf); | |
100 | trace_cpu_in(addr, 'w', val); | |
101 | return val; | |
102 | } | |
103 | ||
104 | uint32_t cpu_inl(pio_addr_t addr) | |
105 | { | |
106 | uint8_t buf[4]; | |
107 | uint32_t val; | |
108 | ||
109 | address_space_read(&address_space_io, addr, MEMTXATTRS_UNSPECIFIED, buf, 4); | |
110 | val = ldl_p(buf); | |
111 | trace_cpu_in(addr, 'l', val); | |
112 | return val; | |
113 | } | |
114 | ||
115 | void portio_list_init(PortioList *piolist, | |
116 | Object *owner, | |
117 | const MemoryRegionPortio *callbacks, | |
118 | void *opaque, const char *name) | |
119 | { | |
120 | unsigned n = 0; | |
121 | ||
122 | while (callbacks[n].size) { | |
123 | ++n; | |
124 | } | |
125 | ||
126 | piolist->ports = callbacks; | |
127 | piolist->nr = 0; | |
128 | piolist->regions = g_new0(MemoryRegion *, n); | |
129 | piolist->address_space = NULL; | |
130 | piolist->opaque = opaque; | |
131 | piolist->owner = owner; | |
132 | piolist->name = name; | |
133 | piolist->flush_coalesced_mmio = false; | |
134 | } | |
135 | ||
136 | void portio_list_set_flush_coalesced(PortioList *piolist) | |
137 | { | |
138 | piolist->flush_coalesced_mmio = true; | |
139 | } | |
140 | ||
141 | void portio_list_destroy(PortioList *piolist) | |
142 | { | |
143 | MemoryRegionPortioList *mrpio; | |
144 | unsigned i; | |
145 | ||
146 | for (i = 0; i < piolist->nr; ++i) { | |
147 | mrpio = container_of(piolist->regions[i], MemoryRegionPortioList, mr); | |
148 | object_unparent(OBJECT(&mrpio->mr)); | |
149 | g_free(mrpio); | |
150 | } | |
151 | g_free(piolist->regions); | |
152 | } | |
153 | ||
154 | static const MemoryRegionPortio *find_portio(MemoryRegionPortioList *mrpio, | |
155 | uint64_t offset, unsigned size, | |
156 | bool write) | |
157 | { | |
158 | const MemoryRegionPortio *mrp; | |
159 | ||
160 | for (mrp = mrpio->ports; mrp->size; ++mrp) { | |
161 | if (offset >= mrp->offset && offset < mrp->offset + mrp->len && | |
162 | size == mrp->size && | |
163 | (write ? (bool)mrp->write : (bool)mrp->read)) { | |
164 | return mrp; | |
165 | } | |
166 | } | |
167 | return NULL; | |
168 | } | |
169 | ||
170 | static uint64_t portio_read(void *opaque, hwaddr addr, unsigned size) | |
171 | { | |
172 | MemoryRegionPortioList *mrpio = opaque; | |
173 | const MemoryRegionPortio *mrp = find_portio(mrpio, addr, size, false); | |
174 | uint64_t data; | |
175 | ||
176 | data = ((uint64_t)1 << (size * 8)) - 1; | |
177 | if (mrp) { | |
178 | data = mrp->read(mrpio->portio_opaque, mrp->base + addr); | |
179 | } else if (size == 2) { | |
180 | mrp = find_portio(mrpio, addr, 1, false); | |
181 | if (mrp) { | |
182 | data = mrp->read(mrpio->portio_opaque, mrp->base + addr); | |
183 | if (addr + 1 < mrp->offset + mrp->len) { | |
184 | data |= mrp->read(mrpio->portio_opaque, mrp->base + addr + 1) << 8; | |
185 | } else { | |
186 | data |= 0xff00; | |
187 | } | |
188 | } | |
189 | } | |
190 | return data; | |
191 | } | |
192 | ||
193 | static void portio_write(void *opaque, hwaddr addr, uint64_t data, | |
194 | unsigned size) | |
195 | { | |
196 | MemoryRegionPortioList *mrpio = opaque; | |
197 | const MemoryRegionPortio *mrp = find_portio(mrpio, addr, size, true); | |
198 | ||
199 | if (mrp) { | |
200 | mrp->write(mrpio->portio_opaque, mrp->base + addr, data); | |
201 | } else if (size == 2) { | |
202 | mrp = find_portio(mrpio, addr, 1, true); | |
203 | if (mrp) { | |
204 | mrp->write(mrpio->portio_opaque, mrp->base + addr, data & 0xff); | |
205 | if (addr + 1 < mrp->offset + mrp->len) { | |
206 | mrp->write(mrpio->portio_opaque, mrp->base + addr + 1, data >> 8); | |
207 | } | |
208 | } | |
209 | } | |
210 | } | |
211 | ||
212 | static const MemoryRegionOps portio_ops = { | |
213 | .read = portio_read, | |
214 | .write = portio_write, | |
215 | .endianness = DEVICE_LITTLE_ENDIAN, | |
216 | .valid.unaligned = true, | |
217 | .impl.unaligned = true, | |
218 | }; | |
219 | ||
220 | static void portio_list_add_1(PortioList *piolist, | |
221 | const MemoryRegionPortio *pio_init, | |
222 | unsigned count, unsigned start, | |
223 | unsigned off_low, unsigned off_high) | |
224 | { | |
225 | MemoryRegionPortioList *mrpio; | |
226 | unsigned i; | |
227 | ||
228 | /* Copy the sub-list and null-terminate it. */ | |
229 | mrpio = g_malloc0(sizeof(MemoryRegionPortioList) + | |
230 | sizeof(MemoryRegionPortio) * (count + 1)); | |
231 | mrpio->portio_opaque = piolist->opaque; | |
232 | memcpy(mrpio->ports, pio_init, sizeof(MemoryRegionPortio) * count); | |
233 | memset(mrpio->ports + count, 0, sizeof(MemoryRegionPortio)); | |
234 | ||
235 | /* Adjust the offsets to all be zero-based for the region. */ | |
236 | for (i = 0; i < count; ++i) { | |
237 | mrpio->ports[i].offset -= off_low; | |
238 | mrpio->ports[i].base = start + off_low; | |
239 | } | |
240 | ||
241 | memory_region_init_io(&mrpio->mr, piolist->owner, &portio_ops, mrpio, | |
242 | piolist->name, off_high - off_low); | |
243 | if (piolist->flush_coalesced_mmio) { | |
244 | memory_region_set_flush_coalesced(&mrpio->mr); | |
245 | } | |
246 | memory_region_add_subregion(piolist->address_space, | |
247 | start + off_low, &mrpio->mr); | |
248 | piolist->regions[piolist->nr] = &mrpio->mr; | |
249 | ++piolist->nr; | |
250 | } | |
251 | ||
252 | void portio_list_add(PortioList *piolist, | |
253 | MemoryRegion *address_space, | |
254 | uint32_t start) | |
255 | { | |
256 | const MemoryRegionPortio *pio, *pio_start = piolist->ports; | |
257 | unsigned int off_low, off_high, off_last, count; | |
258 | ||
259 | piolist->address_space = address_space; | |
260 | ||
261 | /* Handle the first entry specially. */ | |
262 | off_last = off_low = pio_start->offset; | |
263 | off_high = off_low + pio_start->len + pio_start->size - 1; | |
264 | count = 1; | |
265 | ||
266 | for (pio = pio_start + 1; pio->size != 0; pio++, count++) { | |
267 | /* All entries must be sorted by offset. */ | |
268 | assert(pio->offset >= off_last); | |
269 | off_last = pio->offset; | |
270 | ||
271 | /* If we see a hole, break the region. */ | |
272 | if (off_last > off_high) { | |
273 | portio_list_add_1(piolist, pio_start, count, start, off_low, | |
274 | off_high); | |
275 | /* ... and start collecting anew. */ | |
276 | pio_start = pio; | |
277 | off_low = off_last; | |
278 | off_high = off_low + pio->len + pio_start->size - 1; | |
279 | count = 0; | |
280 | } else if (off_last + pio->len > off_high) { | |
281 | off_high = off_last + pio->len + pio_start->size - 1; | |
282 | } | |
283 | } | |
284 | ||
285 | /* There will always be an open sub-list. */ | |
286 | portio_list_add_1(piolist, pio_start, count, start, off_low, off_high); | |
287 | } | |
288 | ||
289 | void portio_list_del(PortioList *piolist) | |
290 | { | |
291 | MemoryRegionPortioList *mrpio; | |
292 | unsigned i; | |
293 | ||
294 | for (i = 0; i < piolist->nr; ++i) { | |
295 | mrpio = container_of(piolist->regions[i], MemoryRegionPortioList, mr); | |
296 | memory_region_del_subregion(piolist->address_space, &mrpio->mr); | |
297 | } | |
298 | } |