Update version for v4.2.0-rc4 release
[qemu.git] / ioport.c
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 "cpu.h"
30 #include "exec/ioport.h"
31 #include "trace-root.h"
32 #include "exec/memory.h"
33 #include "exec/address-spaces.h"
34
35 typedef struct MemoryRegionPortioList {
36 MemoryRegion mr;
37 void *portio_opaque;
38 MemoryRegionPortio ports[];
39 } MemoryRegionPortioList;
40
41 static uint64_t unassigned_io_read(void *opaque, hwaddr addr, unsigned size)
42 {
43 return -1ULL;
44 }
45
46 static void unassigned_io_write(void *opaque, hwaddr addr, uint64_t val,
47 unsigned size)
48 {
49 }
50
51 const MemoryRegionOps unassigned_io_ops = {
52 .read = unassigned_io_read,
53 .write = unassigned_io_write,
54 .endianness = DEVICE_NATIVE_ENDIAN,
55 };
56
57 void cpu_outb(uint32_t addr, uint8_t val)
58 {
59 trace_cpu_out(addr, 'b', val);
60 address_space_write(&address_space_io, addr, MEMTXATTRS_UNSPECIFIED,
61 &val, 1);
62 }
63
64 void cpu_outw(uint32_t addr, uint16_t val)
65 {
66 uint8_t buf[2];
67
68 trace_cpu_out(addr, 'w', val);
69 stw_p(buf, val);
70 address_space_write(&address_space_io, addr, MEMTXATTRS_UNSPECIFIED,
71 buf, 2);
72 }
73
74 void cpu_outl(uint32_t addr, uint32_t val)
75 {
76 uint8_t buf[4];
77
78 trace_cpu_out(addr, 'l', val);
79 stl_p(buf, val);
80 address_space_write(&address_space_io, addr, MEMTXATTRS_UNSPECIFIED,
81 buf, 4);
82 }
83
84 uint8_t cpu_inb(uint32_t addr)
85 {
86 uint8_t val;
87
88 address_space_read(&address_space_io, addr, MEMTXATTRS_UNSPECIFIED,
89 &val, 1);
90 trace_cpu_in(addr, 'b', val);
91 return val;
92 }
93
94 uint16_t cpu_inw(uint32_t addr)
95 {
96 uint8_t buf[2];
97 uint16_t val;
98
99 address_space_read(&address_space_io, addr, MEMTXATTRS_UNSPECIFIED, buf, 2);
100 val = lduw_p(buf);
101 trace_cpu_in(addr, 'w', val);
102 return val;
103 }
104
105 uint32_t cpu_inl(uint32_t addr)
106 {
107 uint8_t buf[4];
108 uint32_t val;
109
110 address_space_read(&address_space_io, addr, MEMTXATTRS_UNSPECIFIED, buf, 4);
111 val = ldl_p(buf);
112 trace_cpu_in(addr, 'l', val);
113 return val;
114 }
115
116 void portio_list_init(PortioList *piolist,
117 Object *owner,
118 const MemoryRegionPortio *callbacks,
119 void *opaque, const char *name)
120 {
121 unsigned n = 0;
122
123 while (callbacks[n].size) {
124 ++n;
125 }
126
127 piolist->ports = callbacks;
128 piolist->nr = 0;
129 piolist->regions = g_new0(MemoryRegion *, n);
130 piolist->address_space = NULL;
131 piolist->opaque = opaque;
132 piolist->owner = owner;
133 piolist->name = name;
134 piolist->flush_coalesced_mmio = false;
135 }
136
137 void portio_list_set_flush_coalesced(PortioList *piolist)
138 {
139 piolist->flush_coalesced_mmio = true;
140 }
141
142 void portio_list_destroy(PortioList *piolist)
143 {
144 MemoryRegionPortioList *mrpio;
145 unsigned i;
146
147 for (i = 0; i < piolist->nr; ++i) {
148 mrpio = container_of(piolist->regions[i], MemoryRegionPortioList, mr);
149 object_unparent(OBJECT(&mrpio->mr));
150 g_free(mrpio);
151 }
152 g_free(piolist->regions);
153 }
154
155 static const MemoryRegionPortio *find_portio(MemoryRegionPortioList *mrpio,
156 uint64_t offset, unsigned size,
157 bool write)
158 {
159 const MemoryRegionPortio *mrp;
160
161 for (mrp = mrpio->ports; mrp->size; ++mrp) {
162 if (offset >= mrp->offset && offset < mrp->offset + mrp->len &&
163 size == mrp->size &&
164 (write ? (bool)mrp->write : (bool)mrp->read)) {
165 return mrp;
166 }
167 }
168 return NULL;
169 }
170
171 static uint64_t portio_read(void *opaque, hwaddr addr, unsigned size)
172 {
173 MemoryRegionPortioList *mrpio = opaque;
174 const MemoryRegionPortio *mrp = find_portio(mrpio, addr, size, false);
175 uint64_t data;
176
177 data = ((uint64_t)1 << (size * 8)) - 1;
178 if (mrp) {
179 data = mrp->read(mrpio->portio_opaque, mrp->base + addr);
180 } else if (size == 2) {
181 mrp = find_portio(mrpio, addr, 1, false);
182 if (mrp) {
183 data = mrp->read(mrpio->portio_opaque, mrp->base + addr);
184 if (addr + 1 < mrp->offset + mrp->len) {
185 data |= mrp->read(mrpio->portio_opaque, mrp->base + addr + 1) << 8;
186 } else {
187 data |= 0xff00;
188 }
189 }
190 }
191 return data;
192 }
193
194 static void portio_write(void *opaque, hwaddr addr, uint64_t data,
195 unsigned size)
196 {
197 MemoryRegionPortioList *mrpio = opaque;
198 const MemoryRegionPortio *mrp = find_portio(mrpio, addr, size, true);
199
200 if (mrp) {
201 mrp->write(mrpio->portio_opaque, mrp->base + addr, data);
202 } else if (size == 2) {
203 mrp = find_portio(mrpio, addr, 1, true);
204 if (mrp) {
205 mrp->write(mrpio->portio_opaque, mrp->base + addr, data & 0xff);
206 if (addr + 1 < mrp->offset + mrp->len) {
207 mrp->write(mrpio->portio_opaque, mrp->base + addr + 1, data >> 8);
208 }
209 }
210 }
211 }
212
213 static const MemoryRegionOps portio_ops = {
214 .read = portio_read,
215 .write = portio_write,
216 .endianness = DEVICE_LITTLE_ENDIAN,
217 .valid.unaligned = true,
218 .impl.unaligned = true,
219 };
220
221 static void portio_list_add_1(PortioList *piolist,
222 const MemoryRegionPortio *pio_init,
223 unsigned count, unsigned start,
224 unsigned off_low, unsigned off_high)
225 {
226 MemoryRegionPortioList *mrpio;
227 unsigned i;
228
229 /* Copy the sub-list and null-terminate it. */
230 mrpio = g_malloc0(sizeof(MemoryRegionPortioList) +
231 sizeof(MemoryRegionPortio) * (count + 1));
232 mrpio->portio_opaque = piolist->opaque;
233 memcpy(mrpio->ports, pio_init, sizeof(MemoryRegionPortio) * count);
234 memset(mrpio->ports + count, 0, sizeof(MemoryRegionPortio));
235
236 /* Adjust the offsets to all be zero-based for the region. */
237 for (i = 0; i < count; ++i) {
238 mrpio->ports[i].offset -= off_low;
239 mrpio->ports[i].base = start + off_low;
240 }
241
242 memory_region_init_io(&mrpio->mr, piolist->owner, &portio_ops, mrpio,
243 piolist->name, off_high - off_low);
244 if (piolist->flush_coalesced_mmio) {
245 memory_region_set_flush_coalesced(&mrpio->mr);
246 }
247 memory_region_add_subregion(piolist->address_space,
248 start + off_low, &mrpio->mr);
249 piolist->regions[piolist->nr] = &mrpio->mr;
250 ++piolist->nr;
251 }
252
253 void portio_list_add(PortioList *piolist,
254 MemoryRegion *address_space,
255 uint32_t start)
256 {
257 const MemoryRegionPortio *pio, *pio_start = piolist->ports;
258 unsigned int off_low, off_high, off_last, count;
259
260 piolist->address_space = address_space;
261
262 /* Handle the first entry specially. */
263 off_last = off_low = pio_start->offset;
264 off_high = off_low + pio_start->len + pio_start->size - 1;
265 count = 1;
266
267 for (pio = pio_start + 1; pio->size != 0; pio++, count++) {
268 /* All entries must be sorted by offset. */
269 assert(pio->offset >= off_last);
270 off_last = pio->offset;
271
272 /* If we see a hole, break the region. */
273 if (off_last > off_high) {
274 portio_list_add_1(piolist, pio_start, count, start, off_low,
275 off_high);
276 /* ... and start collecting anew. */
277 pio_start = pio;
278 off_low = off_last;
279 off_high = off_low + pio->len + pio_start->size - 1;
280 count = 0;
281 } else if (off_last + pio->len > off_high) {
282 off_high = off_last + pio->len + pio_start->size - 1;
283 }
284 }
285
286 /* There will always be an open sub-list. */
287 portio_list_add_1(piolist, pio_start, count, start, off_low, off_high);
288 }
289
290 void portio_list_del(PortioList *piolist)
291 {
292 MemoryRegionPortioList *mrpio;
293 unsigned i;
294
295 for (i = 0; i < piolist->nr; ++i) {
296 mrpio = container_of(piolist->regions[i], MemoryRegionPortioList, mr);
297 memory_region_del_subregion(piolist->address_space, &mrpio->mr);
298 }
299 }