blob: 3d91e79edcb9e4021b824ad4e4e6b46b2b3e93b7 [file] [log] [blame]
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
Paolo Bonzini022c62c2012-12-17 18:19:49 +010028#include "exec/ioport.h"
Prerna Saxenabd3c9aa2010-08-11 17:15:11 +053029#include "trace.h"
Paolo Bonzini022c62c2012-12-17 18:19:49 +010030#include "exec/memory.h"
Jan Kiszkab40acf92013-06-24 10:45:09 +020031#include "exec/address-spaces.h"
Isaku Yamahata32993972009-07-02 19:32:06 +090032
Isaku Yamahata32993972009-07-02 19:32:06 +090033//#define DEBUG_IOPORT
34
35#ifdef DEBUG_IOPORT
36# define LOG_IOPORT(...) qemu_log_mask(CPU_LOG_IOPORT, ## __VA_ARGS__)
37#else
38# define LOG_IOPORT(...) do { } while (0)
39#endif
40
Jan Kiszkab40acf92013-06-24 10:45:09 +020041typedef struct MemoryRegionPortioList {
42 MemoryRegion mr;
43 void *portio_opaque;
44 MemoryRegionPortio ports[];
45} MemoryRegionPortioList;
46
Jan Kiszka3bb28b72013-09-02 18:43:30 +020047static uint64_t unassigned_io_read(void *opaque, hwaddr addr, unsigned size)
48{
49 return -1ULL;
50}
51
52static void unassigned_io_write(void *opaque, hwaddr addr, uint64_t val,
53 unsigned size)
54{
55}
56
57const MemoryRegionOps unassigned_io_ops = {
58 .read = unassigned_io_read,
59 .write = unassigned_io_write,
60 .endianness = DEVICE_NATIVE_ENDIAN,
61};
62
Anthony Liguoric227f092009-10-01 16:12:16 -050063void cpu_outb(pio_addr_t addr, uint8_t val)
Isaku Yamahata32993972009-07-02 19:32:06 +090064{
Isaku Yamahata07323532009-07-14 19:10:43 +090065 LOG_IOPORT("outb: %04"FMT_pioaddr" %02"PRIx8"\n", addr, val);
Prerna Saxenabd3c9aa2010-08-11 17:15:11 +053066 trace_cpu_out(addr, val);
Jan Kiszkab40acf92013-06-24 10:45:09 +020067 address_space_write(&address_space_io, addr, &val, 1);
Isaku Yamahata32993972009-07-02 19:32:06 +090068}
69
Anthony Liguoric227f092009-10-01 16:12:16 -050070void cpu_outw(pio_addr_t addr, uint16_t val)
Isaku Yamahata32993972009-07-02 19:32:06 +090071{
Jan Kiszkab40acf92013-06-24 10:45:09 +020072 uint8_t buf[2];
73
Isaku Yamahata07323532009-07-14 19:10:43 +090074 LOG_IOPORT("outw: %04"FMT_pioaddr" %04"PRIx16"\n", addr, val);
Prerna Saxenabd3c9aa2010-08-11 17:15:11 +053075 trace_cpu_out(addr, val);
Jan Kiszkab40acf92013-06-24 10:45:09 +020076 stw_p(buf, val);
77 address_space_write(&address_space_io, addr, buf, 2);
Isaku Yamahata32993972009-07-02 19:32:06 +090078}
79
Anthony Liguoric227f092009-10-01 16:12:16 -050080void cpu_outl(pio_addr_t addr, uint32_t val)
Isaku Yamahata32993972009-07-02 19:32:06 +090081{
Jan Kiszkab40acf92013-06-24 10:45:09 +020082 uint8_t buf[4];
83
Isaku Yamahata07323532009-07-14 19:10:43 +090084 LOG_IOPORT("outl: %04"FMT_pioaddr" %08"PRIx32"\n", addr, val);
Prerna Saxenabd3c9aa2010-08-11 17:15:11 +053085 trace_cpu_out(addr, val);
Jan Kiszkab40acf92013-06-24 10:45:09 +020086 stl_p(buf, val);
87 address_space_write(&address_space_io, addr, buf, 4);
Isaku Yamahata32993972009-07-02 19:32:06 +090088}
89
Anthony Liguoric227f092009-10-01 16:12:16 -050090uint8_t cpu_inb(pio_addr_t addr)
Isaku Yamahata32993972009-07-02 19:32:06 +090091{
Isaku Yamahata07323532009-07-14 19:10:43 +090092 uint8_t val;
Jan Kiszkab40acf92013-06-24 10:45:09 +020093
94 address_space_read(&address_space_io, addr, &val, 1);
Prerna Saxenabd3c9aa2010-08-11 17:15:11 +053095 trace_cpu_in(addr, val);
Isaku Yamahata07323532009-07-14 19:10:43 +090096 LOG_IOPORT("inb : %04"FMT_pioaddr" %02"PRIx8"\n", addr, val);
Isaku Yamahata32993972009-07-02 19:32:06 +090097 return val;
98}
99
Anthony Liguoric227f092009-10-01 16:12:16 -0500100uint16_t cpu_inw(pio_addr_t addr)
Isaku Yamahata32993972009-07-02 19:32:06 +0900101{
Jan Kiszkab40acf92013-06-24 10:45:09 +0200102 uint8_t buf[2];
Isaku Yamahata07323532009-07-14 19:10:43 +0900103 uint16_t val;
Jan Kiszkab40acf92013-06-24 10:45:09 +0200104
105 address_space_read(&address_space_io, addr, buf, 2);
106 val = lduw_p(buf);
Prerna Saxenabd3c9aa2010-08-11 17:15:11 +0530107 trace_cpu_in(addr, val);
Isaku Yamahata07323532009-07-14 19:10:43 +0900108 LOG_IOPORT("inw : %04"FMT_pioaddr" %04"PRIx16"\n", addr, val);
Isaku Yamahata32993972009-07-02 19:32:06 +0900109 return val;
110}
111
Anthony Liguoric227f092009-10-01 16:12:16 -0500112uint32_t cpu_inl(pio_addr_t addr)
Isaku Yamahata32993972009-07-02 19:32:06 +0900113{
Jan Kiszkab40acf92013-06-24 10:45:09 +0200114 uint8_t buf[4];
Isaku Yamahata07323532009-07-14 19:10:43 +0900115 uint32_t val;
Jan Kiszkab40acf92013-06-24 10:45:09 +0200116
117 address_space_read(&address_space_io, addr, buf, 4);
118 val = ldl_p(buf);
Prerna Saxenabd3c9aa2010-08-11 17:15:11 +0530119 trace_cpu_in(addr, val);
Isaku Yamahata07323532009-07-14 19:10:43 +0900120 LOG_IOPORT("inl : %04"FMT_pioaddr" %08"PRIx32"\n", addr, val);
Isaku Yamahata32993972009-07-02 19:32:06 +0900121 return val;
122}
Avi Kivity6bf9fd42011-09-26 14:52:26 +0300123
124void portio_list_init(PortioList *piolist,
Paolo Bonzinidb10ca92013-06-06 21:19:53 -0400125 Object *owner,
Avi Kivity6bf9fd42011-09-26 14:52:26 +0300126 const MemoryRegionPortio *callbacks,
127 void *opaque, const char *name)
128{
129 unsigned n = 0;
130
131 while (callbacks[n].size) {
132 ++n;
133 }
134
135 piolist->ports = callbacks;
136 piolist->nr = 0;
137 piolist->regions = g_new0(MemoryRegion *, n);
138 piolist->address_space = NULL;
139 piolist->opaque = opaque;
Paolo Bonzinidb10ca92013-06-06 21:19:53 -0400140 piolist->owner = owner;
Avi Kivity6bf9fd42011-09-26 14:52:26 +0300141 piolist->name = name;
Jan Kiszkac76bc482013-07-02 20:22:37 +0200142 piolist->flush_coalesced_mmio = false;
143}
144
145void portio_list_set_flush_coalesced(PortioList *piolist)
146{
147 piolist->flush_coalesced_mmio = true;
Avi Kivity6bf9fd42011-09-26 14:52:26 +0300148}
149
150void portio_list_destroy(PortioList *piolist)
151{
152 g_free(piolist->regions);
153}
154
Jan Kiszkab40acf92013-06-24 10:45:09 +0200155static 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
171static 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 assert(mrp);
183 data = mrp->read(mrpio->portio_opaque, mrp->base + addr) |
184 (mrp->read(mrpio->portio_opaque, mrp->base + addr + 1) << 8);
185 }
186 return data;
187}
188
189static void portio_write(void *opaque, hwaddr addr, uint64_t data,
190 unsigned size)
191{
192 MemoryRegionPortioList *mrpio = opaque;
193 const MemoryRegionPortio *mrp = find_portio(mrpio, addr, size, true);
194
195 if (mrp) {
196 mrp->write(mrpio->portio_opaque, mrp->base + addr, data);
197 } else if (size == 2) {
198 mrp = find_portio(mrpio, addr, 1, true);
199 assert(mrp);
200 mrp->write(mrpio->portio_opaque, mrp->base + addr, data & 0xff);
201 mrp->write(mrpio->portio_opaque, mrp->base + addr + 1, data >> 8);
202 }
203}
204
205static const MemoryRegionOps portio_ops = {
206 .read = portio_read,
207 .write = portio_write,
Paolo Bonzinif36a6382013-07-22 15:54:25 +0200208 .endianness = DEVICE_LITTLE_ENDIAN,
Jan Kiszkab40acf92013-06-24 10:45:09 +0200209 .valid.unaligned = true,
210 .impl.unaligned = true,
211};
212
Avi Kivity6bf9fd42011-09-26 14:52:26 +0300213static void portio_list_add_1(PortioList *piolist,
214 const MemoryRegionPortio *pio_init,
215 unsigned count, unsigned start,
216 unsigned off_low, unsigned off_high)
217{
Jan Kiszkab40acf92013-06-24 10:45:09 +0200218 MemoryRegionPortioList *mrpio;
Avi Kivity6bf9fd42011-09-26 14:52:26 +0300219 unsigned i;
220
221 /* Copy the sub-list and null-terminate it. */
Jan Kiszkab40acf92013-06-24 10:45:09 +0200222 mrpio = g_malloc0(sizeof(MemoryRegionPortioList) +
223 sizeof(MemoryRegionPortio) * (count + 1));
224 mrpio->portio_opaque = piolist->opaque;
225 memcpy(mrpio->ports, pio_init, sizeof(MemoryRegionPortio) * count);
226 memset(mrpio->ports + count, 0, sizeof(MemoryRegionPortio));
Avi Kivity6bf9fd42011-09-26 14:52:26 +0300227
228 /* Adjust the offsets to all be zero-based for the region. */
229 for (i = 0; i < count; ++i) {
Jan Kiszkab40acf92013-06-24 10:45:09 +0200230 mrpio->ports[i].offset -= off_low;
231 mrpio->ports[i].base = start + off_low;
Avi Kivity6bf9fd42011-09-26 14:52:26 +0300232 }
233
Avi Kivityde58ac72012-01-08 19:46:17 +0200234 /*
235 * Use an alias so that the callback is called with an absolute address,
236 * rather than an offset relative to to start + off_low.
237 */
Paolo Bonzinidb10ca92013-06-06 21:19:53 -0400238 memory_region_init_io(&mrpio->mr, piolist->owner, &portio_ops, mrpio,
239 piolist->name, off_high - off_low);
Jan Kiszkac76bc482013-07-02 20:22:37 +0200240 if (piolist->flush_coalesced_mmio) {
241 memory_region_set_flush_coalesced(&mrpio->mr);
242 }
Avi Kivity6bf9fd42011-09-26 14:52:26 +0300243 memory_region_add_subregion(piolist->address_space,
Jan Kiszkab40acf92013-06-24 10:45:09 +0200244 start + off_low, &mrpio->mr);
245 piolist->regions[piolist->nr] = &mrpio->mr;
Avi Kivityde58ac72012-01-08 19:46:17 +0200246 ++piolist->nr;
Avi Kivity6bf9fd42011-09-26 14:52:26 +0300247}
248
249void portio_list_add(PortioList *piolist,
250 MemoryRegion *address_space,
251 uint32_t start)
252{
253 const MemoryRegionPortio *pio, *pio_start = piolist->ports;
254 unsigned int off_low, off_high, off_last, count;
255
256 piolist->address_space = address_space;
257
258 /* Handle the first entry specially. */
259 off_last = off_low = pio_start->offset;
260 off_high = off_low + pio_start->len;
261 count = 1;
262
263 for (pio = pio_start + 1; pio->size != 0; pio++, count++) {
264 /* All entries must be sorted by offset. */
265 assert(pio->offset >= off_last);
266 off_last = pio->offset;
267
268 /* If we see a hole, break the region. */
269 if (off_last > off_high) {
270 portio_list_add_1(piolist, pio_start, count, start, off_low,
271 off_high);
272 /* ... and start collecting anew. */
273 pio_start = pio;
274 off_low = off_last;
275 off_high = off_low + pio->len;
276 count = 0;
277 } else if (off_last + pio->len > off_high) {
278 off_high = off_last + pio->len;
279 }
280 }
281
282 /* There will always be an open sub-list. */
283 portio_list_add_1(piolist, pio_start, count, start, off_low, off_high);
284}
285
286void portio_list_del(PortioList *piolist)
287{
Jan Kiszkab40acf92013-06-24 10:45:09 +0200288 MemoryRegionPortioList *mrpio;
Avi Kivity6bf9fd42011-09-26 14:52:26 +0300289 unsigned i;
290
291 for (i = 0; i < piolist->nr; ++i) {
Jan Kiszkab40acf92013-06-24 10:45:09 +0200292 mrpio = container_of(piolist->regions[i], MemoryRegionPortioList, mr);
293 memory_region_del_subregion(piolist->address_space, &mrpio->mr);
294 memory_region_destroy(&mrpio->mr);
295 g_free(mrpio);
Avi Kivity6bf9fd42011-09-26 14:52:26 +0300296 piolist->regions[i] = NULL;
297 }
298}