tests: virtio-9p: rename PCI configuration test
[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 "qemu-common.h"
30 #include "cpu.h"
31 #include "exec/ioport.h"
32 #include "trace.h"
33 #include "exec/memory.h"
34 #include "exec/address-spaces.h"
35
36 typedef struct MemoryRegionPortioList {
37 MemoryRegion mr;
38 void *portio_opaque;
39 MemoryRegionPortio ports[];
40 } MemoryRegionPortioList;
41
42 static uint64_t unassigned_io_read(void *opaque, hwaddr addr, unsigned size)
43 {
44 return -1ULL;
45 }
46
47 static void unassigned_io_write(void *opaque, hwaddr addr, uint64_t val,
48 unsigned size)
49 {
50 }
51
52 const MemoryRegionOps unassigned_io_ops = {
53 .read = unassigned_io_read,
54 .write = unassigned_io_write,
55 .endianness = DEVICE_NATIVE_ENDIAN,
56 };
57
58 void cpu_outb(uint32_t addr, uint8_t val)
59 {
60 trace_cpu_out(addr, 'b', val);
61 address_space_write(&address_space_io, addr, MEMTXATTRS_UNSPECIFIED,
62 &val, 1);
63 }
64
65 void cpu_outw(uint32_t addr, uint16_t val)
66 {
67 uint8_t buf[2];
68
69 trace_cpu_out(addr, 'w', val);
70 stw_p(buf, val);
71 address_space_write(&address_space_io, addr, MEMTXATTRS_UNSPECIFIED,
72 buf, 2);
73 }
74
75 void cpu_outl(uint32_t addr, uint32_t val)
76 {
77 uint8_t buf[4];
78
79 trace_cpu_out(addr, 'l', val);
80 stl_p(buf, val);
81 address_space_write(&address_space_io, addr, MEMTXATTRS_UNSPECIFIED,
82 buf, 4);
83 }
84
85 uint8_t cpu_inb(uint32_t addr)
86 {
87 uint8_t val;
88
89 address_space_read(&address_space_io, addr, MEMTXATTRS_UNSPECIFIED,
90 &val, 1);
91 trace_cpu_in(addr, 'b', val);
92 return val;
93 }
94
95 uint16_t cpu_inw(uint32_t addr)
96 {
97 uint8_t buf[2];
98 uint16_t val;
99
100 address_space_read(&address_space_io, addr, MEMTXATTRS_UNSPECIFIED, buf, 2);
101 val = lduw_p(buf);
102 trace_cpu_in(addr, 'w', val);
103 return val;
104 }
105
106 uint32_t cpu_inl(uint32_t addr)
107 {
108 uint8_t buf[4];
109 uint32_t val;
110
111 address_space_read(&address_space_io, addr, MEMTXATTRS_UNSPECIFIED, buf, 4);
112 val = ldl_p(buf);
113 trace_cpu_in(addr, 'l', val);
114 return val;
115 }
116
117 void portio_list_init(PortioList *piolist,
118 Object *owner,
119 const MemoryRegionPortio *callbacks,
120 void *opaque, const char *name)
121 {
122 unsigned n = 0;
123
124 while (callbacks[n].size) {
125 ++n;
126 }
127
128 piolist->ports = callbacks;
129 piolist->nr = 0;
130 piolist->regions = g_new0(MemoryRegion *, n);
131 piolist->address_space = NULL;
132 piolist->opaque = opaque;
133 piolist->owner = owner;
134 piolist->name = name;
135 piolist->flush_coalesced_mmio = false;
136 }
137
138 void portio_list_set_flush_coalesced(PortioList *piolist)
139 {
140 piolist->flush_coalesced_mmio = true;
141 }
142
143 void portio_list_destroy(PortioList *piolist)
144 {
145 MemoryRegionPortioList *mrpio;
146 unsigned i;
147
148 for (i = 0; i < piolist->nr; ++i) {
149 mrpio = container_of(piolist->regions[i], MemoryRegionPortioList, mr);
150 object_unparent(OBJECT(&mrpio->mr));
151 g_free(mrpio);
152 }
153 g_free(piolist->regions);
154 }
155
156 static const MemoryRegionPortio *find_portio(MemoryRegionPortioList *mrpio,
157 uint64_t offset, unsigned size,
158 bool write)
159 {
160 const MemoryRegionPortio *mrp;
161
162 for (mrp = mrpio->ports; mrp->size; ++mrp) {
163 if (offset >= mrp->offset && offset < mrp->offset + mrp->len &&
164 size == mrp->size &&
165 (write ? (bool)mrp->write : (bool)mrp->read)) {
166 return mrp;
167 }
168 }
169 return NULL;
170 }
171
172 static uint64_t portio_read(void *opaque, hwaddr addr, unsigned size)
173 {
174 MemoryRegionPortioList *mrpio = opaque;
175 const MemoryRegionPortio *mrp = find_portio(mrpio, addr, size, false);
176 uint64_t data;
177
178 data = ((uint64_t)1 << (size * 8)) - 1;
179 if (mrp) {
180 data = mrp->read(mrpio->portio_opaque, mrp->base + addr);
181 } else if (size == 2) {
182 mrp = find_portio(mrpio, addr, 1, false);
183 if (mrp) {
184 data = mrp->read(mrpio->portio_opaque, mrp->base + addr);
185 if (addr + 1 < mrp->offset + mrp->len) {
186 data |= mrp->read(mrpio->portio_opaque, mrp->base + addr + 1) << 8;
187 } else {
188 data |= 0xff00;
189 }
190 }
191 }
192 return data;
193 }
194
195 static void portio_write(void *opaque, hwaddr addr, uint64_t data,
196 unsigned size)
197 {
198 MemoryRegionPortioList *mrpio = opaque;
199 const MemoryRegionPortio *mrp = find_portio(mrpio, addr, size, true);
200
201 if (mrp) {
202 mrp->write(mrpio->portio_opaque, mrp->base + addr, data);
203 } else if (size == 2) {
204 mrp = find_portio(mrpio, addr, 1, true);
205 if (mrp) {
206 mrp->write(mrpio->portio_opaque, mrp->base + addr, data & 0xff);
207 if (addr + 1 < mrp->offset + mrp->len) {
208 mrp->write(mrpio->portio_opaque, mrp->base + addr + 1, data >> 8);
209 }
210 }
211 }
212 }
213
214 static const MemoryRegionOps portio_ops = {
215 .read = portio_read,
216 .write = portio_write,
217 .endianness = DEVICE_LITTLE_ENDIAN,
218 .valid.unaligned = true,
219 .impl.unaligned = true,
220 };
221
222 static void portio_list_add_1(PortioList *piolist,
223 const MemoryRegionPortio *pio_init,
224 unsigned count, unsigned start,
225 unsigned off_low, unsigned off_high)
226 {
227 MemoryRegionPortioList *mrpio;
228 unsigned i;
229
230 /* Copy the sub-list and null-terminate it. */
231 mrpio = g_malloc0(sizeof(MemoryRegionPortioList) +
232 sizeof(MemoryRegionPortio) * (count + 1));
233 mrpio->portio_opaque = piolist->opaque;
234 memcpy(mrpio->ports, pio_init, sizeof(MemoryRegionPortio) * count);
235 memset(mrpio->ports + count, 0, sizeof(MemoryRegionPortio));
236
237 /* Adjust the offsets to all be zero-based for the region. */
238 for (i = 0; i < count; ++i) {
239 mrpio->ports[i].offset -= off_low;
240 mrpio->ports[i].base = start + off_low;
241 }
242
243 memory_region_init_io(&mrpio->mr, piolist->owner, &portio_ops, mrpio,
244 piolist->name, off_high - off_low);
245 if (piolist->flush_coalesced_mmio) {
246 memory_region_set_flush_coalesced(&mrpio->mr);
247 }
248 memory_region_add_subregion(piolist->address_space,
249 start + off_low, &mrpio->mr);
250 piolist->regions[piolist->nr] = &mrpio->mr;
251 ++piolist->nr;
252 }
253
254 void portio_list_add(PortioList *piolist,
255 MemoryRegion *address_space,
256 uint32_t start)
257 {
258 const MemoryRegionPortio *pio, *pio_start = piolist->ports;
259 unsigned int off_low, off_high, off_last, count;
260
261 piolist->address_space = address_space;
262
263 /* Handle the first entry specially. */
264 off_last = off_low = pio_start->offset;
265 off_high = off_low + pio_start->len + pio_start->size - 1;
266 count = 1;
267
268 for (pio = pio_start + 1; pio->size != 0; pio++, count++) {
269 /* All entries must be sorted by offset. */
270 assert(pio->offset >= off_last);
271 off_last = pio->offset;
272
273 /* If we see a hole, break the region. */
274 if (off_last > off_high) {
275 portio_list_add_1(piolist, pio_start, count, start, off_low,
276 off_high);
277 /* ... and start collecting anew. */
278 pio_start = pio;
279 off_low = off_last;
280 off_high = off_low + pio->len + pio_start->size - 1;
281 count = 0;
282 } else if (off_last + pio->len > off_high) {
283 off_high = off_last + pio->len + pio_start->size - 1;
284 }
285 }
286
287 /* There will always be an open sub-list. */
288 portio_list_add_1(piolist, pio_start, count, start, off_low, off_high);
289 }
290
291 void portio_list_del(PortioList *piolist)
292 {
293 MemoryRegionPortioList *mrpio;
294 unsigned i;
295
296 for (i = 0; i < piolist->nr; ++i) {
297 mrpio = container_of(piolist->regions[i], MemoryRegionPortioList, mr);
298 memory_region_del_subregion(piolist->address_space, &mrpio->mr);
299 }
300 }