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Isaku Yamahata32993972009-07-02 19:32:06 +09001/*
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
Peter Maydelld38ea872016-01-29 17:50:05 +000028#include "qemu/osdep.h"
Paolo Bonzini33c11872016-03-15 16:58:45 +010029#include "qemu-common.h"
30#include "cpu.h"
Paolo Bonzini022c62c2012-12-17 18:19:49 +010031#include "exec/ioport.h"
Daniel P. Berrange0ab8ed12017-01-25 16:14:15 +000032#include "trace-root.h"
Paolo Bonzini022c62c2012-12-17 18:19:49 +010033#include "exec/memory.h"
Jan Kiszkab40acf92013-06-24 10:45:09 +020034#include "exec/address-spaces.h"
Isaku Yamahata32993972009-07-02 19:32:06 +090035
Jan Kiszkab40acf92013-06-24 10:45:09 +020036typedef struct MemoryRegionPortioList {
37 MemoryRegion mr;
38 void *portio_opaque;
39 MemoryRegionPortio ports[];
40} MemoryRegionPortioList;
41
Jan Kiszka3bb28b72013-09-02 18:43:30 +020042static uint64_t unassigned_io_read(void *opaque, hwaddr addr, unsigned size)
43{
44 return -1ULL;
45}
46
47static void unassigned_io_write(void *opaque, hwaddr addr, uint64_t val,
48 unsigned size)
49{
50}
51
52const MemoryRegionOps unassigned_io_ops = {
53 .read = unassigned_io_read,
54 .write = unassigned_io_write,
55 .endianness = DEVICE_NATIVE_ENDIAN,
56};
57
Paolo Bonzini89a80e72016-03-16 10:20:34 +010058void cpu_outb(uint32_t addr, uint8_t val)
Isaku Yamahata32993972009-07-02 19:32:06 +090059{
Paolo Bonzini6f94b7d2015-10-16 15:08:34 +020060 trace_cpu_out(addr, 'b', val);
Peter Maydell5c9eb022015-04-26 16:49:24 +010061 address_space_write(&address_space_io, addr, MEMTXATTRS_UNSPECIFIED,
62 &val, 1);
Isaku Yamahata32993972009-07-02 19:32:06 +090063}
64
Paolo Bonzini89a80e72016-03-16 10:20:34 +010065void cpu_outw(uint32_t addr, uint16_t val)
Isaku Yamahata32993972009-07-02 19:32:06 +090066{
Jan Kiszkab40acf92013-06-24 10:45:09 +020067 uint8_t buf[2];
68
Paolo Bonzini6f94b7d2015-10-16 15:08:34 +020069 trace_cpu_out(addr, 'w', val);
Jan Kiszkab40acf92013-06-24 10:45:09 +020070 stw_p(buf, val);
Peter Maydell5c9eb022015-04-26 16:49:24 +010071 address_space_write(&address_space_io, addr, MEMTXATTRS_UNSPECIFIED,
72 buf, 2);
Isaku Yamahata32993972009-07-02 19:32:06 +090073}
74
Paolo Bonzini89a80e72016-03-16 10:20:34 +010075void cpu_outl(uint32_t addr, uint32_t val)
Isaku Yamahata32993972009-07-02 19:32:06 +090076{
Jan Kiszkab40acf92013-06-24 10:45:09 +020077 uint8_t buf[4];
78
Paolo Bonzini6f94b7d2015-10-16 15:08:34 +020079 trace_cpu_out(addr, 'l', val);
Jan Kiszkab40acf92013-06-24 10:45:09 +020080 stl_p(buf, val);
Peter Maydell5c9eb022015-04-26 16:49:24 +010081 address_space_write(&address_space_io, addr, MEMTXATTRS_UNSPECIFIED,
82 buf, 4);
Isaku Yamahata32993972009-07-02 19:32:06 +090083}
84
Paolo Bonzini89a80e72016-03-16 10:20:34 +010085uint8_t cpu_inb(uint32_t addr)
Isaku Yamahata32993972009-07-02 19:32:06 +090086{
Isaku Yamahata07323532009-07-14 19:10:43 +090087 uint8_t val;
Jan Kiszkab40acf92013-06-24 10:45:09 +020088
Peter Maydell5c9eb022015-04-26 16:49:24 +010089 address_space_read(&address_space_io, addr, MEMTXATTRS_UNSPECIFIED,
90 &val, 1);
Paolo Bonzini6f94b7d2015-10-16 15:08:34 +020091 trace_cpu_in(addr, 'b', val);
Isaku Yamahata32993972009-07-02 19:32:06 +090092 return val;
93}
94
Paolo Bonzini89a80e72016-03-16 10:20:34 +010095uint16_t cpu_inw(uint32_t addr)
Isaku Yamahata32993972009-07-02 19:32:06 +090096{
Jan Kiszkab40acf92013-06-24 10:45:09 +020097 uint8_t buf[2];
Isaku Yamahata07323532009-07-14 19:10:43 +090098 uint16_t val;
Jan Kiszkab40acf92013-06-24 10:45:09 +020099
Peter Maydell5c9eb022015-04-26 16:49:24 +0100100 address_space_read(&address_space_io, addr, MEMTXATTRS_UNSPECIFIED, buf, 2);
Jan Kiszkab40acf92013-06-24 10:45:09 +0200101 val = lduw_p(buf);
Paolo Bonzini6f94b7d2015-10-16 15:08:34 +0200102 trace_cpu_in(addr, 'w', val);
Isaku Yamahata32993972009-07-02 19:32:06 +0900103 return val;
104}
105
Paolo Bonzini89a80e72016-03-16 10:20:34 +0100106uint32_t cpu_inl(uint32_t addr)
Isaku Yamahata32993972009-07-02 19:32:06 +0900107{
Jan Kiszkab40acf92013-06-24 10:45:09 +0200108 uint8_t buf[4];
Isaku Yamahata07323532009-07-14 19:10:43 +0900109 uint32_t val;
Jan Kiszkab40acf92013-06-24 10:45:09 +0200110
Peter Maydell5c9eb022015-04-26 16:49:24 +0100111 address_space_read(&address_space_io, addr, MEMTXATTRS_UNSPECIFIED, buf, 4);
Jan Kiszkab40acf92013-06-24 10:45:09 +0200112 val = ldl_p(buf);
Paolo Bonzini6f94b7d2015-10-16 15:08:34 +0200113 trace_cpu_in(addr, 'l', val);
Isaku Yamahata32993972009-07-02 19:32:06 +0900114 return val;
115}
Avi Kivity6bf9fd42011-09-26 14:52:26 +0300116
117void portio_list_init(PortioList *piolist,
Paolo Bonzinidb10ca92013-06-06 21:19:53 -0400118 Object *owner,
Avi Kivity6bf9fd42011-09-26 14:52:26 +0300119 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;
Paolo Bonzinidb10ca92013-06-06 21:19:53 -0400133 piolist->owner = owner;
Avi Kivity6bf9fd42011-09-26 14:52:26 +0300134 piolist->name = name;
Jan Kiszkac76bc482013-07-02 20:22:37 +0200135 piolist->flush_coalesced_mmio = false;
136}
137
138void portio_list_set_flush_coalesced(PortioList *piolist)
139{
140 piolist->flush_coalesced_mmio = true;
Avi Kivity6bf9fd42011-09-26 14:52:26 +0300141}
142
143void portio_list_destroy(PortioList *piolist)
144{
Paolo Bonzinie3fb0ad2014-06-11 13:02:51 +0200145 MemoryRegionPortioList *mrpio;
146 unsigned i;
147
148 for (i = 0; i < piolist->nr; ++i) {
149 mrpio = container_of(piolist->regions[i], MemoryRegionPortioList, mr);
Paolo Bonzinid8d95812014-06-11 12:42:01 +0200150 object_unparent(OBJECT(&mrpio->mr));
Paolo Bonzinie3fb0ad2014-06-11 13:02:51 +0200151 g_free(mrpio);
152 }
Avi Kivity6bf9fd42011-09-26 14:52:26 +0300153 g_free(piolist->regions);
154}
155
Jan Kiszkab40acf92013-06-24 10:45:09 +0200156static 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
172static 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);
Paolo Bonzini147ed372015-03-30 12:49:40 +0200183 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 }
Jan Kiszkab40acf92013-06-24 10:45:09 +0200191 }
192 return data;
193}
194
195static 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);
Paolo Bonzini147ed372015-03-30 12:49:40 +0200205 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 }
Jan Kiszkab40acf92013-06-24 10:45:09 +0200211 }
212}
213
214static const MemoryRegionOps portio_ops = {
215 .read = portio_read,
216 .write = portio_write,
Paolo Bonzinif36a6382013-07-22 15:54:25 +0200217 .endianness = DEVICE_LITTLE_ENDIAN,
Jan Kiszkab40acf92013-06-24 10:45:09 +0200218 .valid.unaligned = true,
219 .impl.unaligned = true,
220};
221
Avi Kivity6bf9fd42011-09-26 14:52:26 +0300222static 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{
Jan Kiszkab40acf92013-06-24 10:45:09 +0200227 MemoryRegionPortioList *mrpio;
Avi Kivity6bf9fd42011-09-26 14:52:26 +0300228 unsigned i;
229
230 /* Copy the sub-list and null-terminate it. */
Jan Kiszkab40acf92013-06-24 10:45:09 +0200231 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));
Avi Kivity6bf9fd42011-09-26 14:52:26 +0300236
237 /* Adjust the offsets to all be zero-based for the region. */
238 for (i = 0; i < count; ++i) {
Jan Kiszkab40acf92013-06-24 10:45:09 +0200239 mrpio->ports[i].offset -= off_low;
240 mrpio->ports[i].base = start + off_low;
Avi Kivity6bf9fd42011-09-26 14:52:26 +0300241 }
242
Paolo Bonzinidb10ca92013-06-06 21:19:53 -0400243 memory_region_init_io(&mrpio->mr, piolist->owner, &portio_ops, mrpio,
244 piolist->name, off_high - off_low);
Jan Kiszkac76bc482013-07-02 20:22:37 +0200245 if (piolist->flush_coalesced_mmio) {
246 memory_region_set_flush_coalesced(&mrpio->mr);
247 }
Avi Kivity6bf9fd42011-09-26 14:52:26 +0300248 memory_region_add_subregion(piolist->address_space,
Jan Kiszkab40acf92013-06-24 10:45:09 +0200249 start + off_low, &mrpio->mr);
250 piolist->regions[piolist->nr] = &mrpio->mr;
Avi Kivityde58ac72012-01-08 19:46:17 +0200251 ++piolist->nr;
Avi Kivity6bf9fd42011-09-26 14:52:26 +0300252}
253
254void 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;
Paolo Bonzini4080a132015-03-30 12:35:00 +0200265 off_high = off_low + pio_start->len + pio_start->size - 1;
Avi Kivity6bf9fd42011-09-26 14:52:26 +0300266 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;
Paolo Bonzini4080a132015-03-30 12:35:00 +0200280 off_high = off_low + pio->len + pio_start->size - 1;
Avi Kivity6bf9fd42011-09-26 14:52:26 +0300281 count = 0;
282 } else if (off_last + pio->len > off_high) {
Paolo Bonzini4080a132015-03-30 12:35:00 +0200283 off_high = off_last + pio->len + pio_start->size - 1;
Avi Kivity6bf9fd42011-09-26 14:52:26 +0300284 }
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
291void portio_list_del(PortioList *piolist)
292{
Jan Kiszkab40acf92013-06-24 10:45:09 +0200293 MemoryRegionPortioList *mrpio;
Avi Kivity6bf9fd42011-09-26 14:52:26 +0300294 unsigned i;
295
296 for (i = 0; i < piolist->nr; ++i) {
Jan Kiszkab40acf92013-06-24 10:45:09 +0200297 mrpio = container_of(piolist->regions[i], MemoryRegionPortioList, mr);
298 memory_region_del_subregion(piolist->address_space, &mrpio->mr);
Avi Kivity6bf9fd42011-09-26 14:52:26 +0300299 }
300}