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28#include "exec/ioport.h"
29#include "trace.h"
30#include "exec/memory.h"
31#include "exec/address-spaces.h"
32
33
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
41typedef struct MemoryRegionPortioList {
42 MemoryRegion mr;
43 void *portio_opaque;
44 MemoryRegionPortio ports[];
45} MemoryRegionPortioList;
46
47static 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
63void cpu_outb(pio_addr_t addr, uint8_t val)
64{
65 LOG_IOPORT("outb: %04"FMT_pioaddr" %02"PRIx8"\n", addr, val);
66 trace_cpu_out(addr, val);
67 address_space_write(&address_space_io, addr, MEMTXATTRS_UNSPECIFIED,
68 &val, 1);
69}
70
71void cpu_outw(pio_addr_t addr, uint16_t val)
72{
73 uint8_t buf[2];
74
75 LOG_IOPORT("outw: %04"FMT_pioaddr" %04"PRIx16"\n", addr, val);
76 trace_cpu_out(addr, val);
77 stw_p(buf, val);
78 address_space_write(&address_space_io, addr, MEMTXATTRS_UNSPECIFIED,
79 buf, 2);
80}
81
82void cpu_outl(pio_addr_t addr, uint32_t val)
83{
84 uint8_t buf[4];
85
86 LOG_IOPORT("outl: %04"FMT_pioaddr" %08"PRIx32"\n", addr, val);
87 trace_cpu_out(addr, val);
88 stl_p(buf, val);
89 address_space_write(&address_space_io, addr, MEMTXATTRS_UNSPECIFIED,
90 buf, 4);
91}
92
93uint8_t cpu_inb(pio_addr_t addr)
94{
95 uint8_t val;
96
97 address_space_read(&address_space_io, addr, MEMTXATTRS_UNSPECIFIED,
98 &val, 1);
99 trace_cpu_in(addr, val);
100 LOG_IOPORT("inb : %04"FMT_pioaddr" %02"PRIx8"\n", addr, val);
101 return val;
102}
103
104uint16_t cpu_inw(pio_addr_t addr)
105{
106 uint8_t buf[2];
107 uint16_t val;
108
109 address_space_read(&address_space_io, addr, MEMTXATTRS_UNSPECIFIED, buf, 2);
110 val = lduw_p(buf);
111 trace_cpu_in(addr, val);
112 LOG_IOPORT("inw : %04"FMT_pioaddr" %04"PRIx16"\n", addr, val);
113 return val;
114}
115
116uint32_t cpu_inl(pio_addr_t addr)
117{
118 uint8_t buf[4];
119 uint32_t val;
120
121 address_space_read(&address_space_io, addr, MEMTXATTRS_UNSPECIFIED, buf, 4);
122 val = ldl_p(buf);
123 trace_cpu_in(addr, val);
124 LOG_IOPORT("inl : %04"FMT_pioaddr" %08"PRIx32"\n", addr, val);
125 return val;
126}
127
128void portio_list_init(PortioList *piolist,
129 Object *owner,
130 const MemoryRegionPortio *callbacks,
131 void *opaque, const char *name)
132{
133 unsigned n = 0;
134
135 while (callbacks[n].size) {
136 ++n;
137 }
138
139 piolist->ports = callbacks;
140 piolist->nr = 0;
141 piolist->regions = g_new0(MemoryRegion *, n);
142 piolist->address_space = NULL;
143 piolist->opaque = opaque;
144 piolist->owner = owner;
145 piolist->name = name;
146 piolist->flush_coalesced_mmio = false;
147}
148
149void portio_list_set_flush_coalesced(PortioList *piolist)
150{
151 piolist->flush_coalesced_mmio = true;
152}
153
154void portio_list_destroy(PortioList *piolist)
155{
156 MemoryRegionPortioList *mrpio;
157 unsigned i;
158
159 for (i = 0; i < piolist->nr; ++i) {
160 mrpio = container_of(piolist->regions[i], MemoryRegionPortioList, mr);
161 object_unparent(OBJECT(&mrpio->mr));
162 g_free(mrpio);
163 }
164 g_free(piolist->regions);
165}
166
167static const MemoryRegionPortio *find_portio(MemoryRegionPortioList *mrpio,
168 uint64_t offset, unsigned size,
169 bool write)
170{
171 const MemoryRegionPortio *mrp;
172
173 for (mrp = mrpio->ports; mrp->size; ++mrp) {
174 if (offset >= mrp->offset && offset < mrp->offset + mrp->len &&
175 size == mrp->size &&
176 (write ? (bool)mrp->write : (bool)mrp->read)) {
177 return mrp;
178 }
179 }
180 return NULL;
181}
182
183static uint64_t portio_read(void *opaque, hwaddr addr, unsigned size)
184{
185 MemoryRegionPortioList *mrpio = opaque;
186 const MemoryRegionPortio *mrp = find_portio(mrpio, addr, size, false);
187 uint64_t data;
188
189 data = ((uint64_t)1 << (size * 8)) - 1;
190 if (mrp) {
191 data = mrp->read(mrpio->portio_opaque, mrp->base + addr);
192 } else if (size == 2) {
193 mrp = find_portio(mrpio, addr, 1, false);
194 if (mrp) {
195 data = mrp->read(mrpio->portio_opaque, mrp->base + addr);
196 if (addr + 1 < mrp->offset + mrp->len) {
197 data |= mrp->read(mrpio->portio_opaque, mrp->base + addr + 1) << 8;
198 } else {
199 data |= 0xff00;
200 }
201 }
202 }
203 return data;
204}
205
206static void portio_write(void *opaque, hwaddr addr, uint64_t data,
207 unsigned size)
208{
209 MemoryRegionPortioList *mrpio = opaque;
210 const MemoryRegionPortio *mrp = find_portio(mrpio, addr, size, true);
211
212 if (mrp) {
213 mrp->write(mrpio->portio_opaque, mrp->base + addr, data);
214 } else if (size == 2) {
215 mrp = find_portio(mrpio, addr, 1, true);
216 if (mrp) {
217 mrp->write(mrpio->portio_opaque, mrp->base + addr, data & 0xff);
218 if (addr + 1 < mrp->offset + mrp->len) {
219 mrp->write(mrpio->portio_opaque, mrp->base + addr + 1, data >> 8);
220 }
221 }
222 }
223}
224
225static const MemoryRegionOps portio_ops = {
226 .read = portio_read,
227 .write = portio_write,
228 .endianness = DEVICE_LITTLE_ENDIAN,
229 .valid.unaligned = true,
230 .impl.unaligned = true,
231};
232
233static void portio_list_add_1(PortioList *piolist,
234 const MemoryRegionPortio *pio_init,
235 unsigned count, unsigned start,
236 unsigned off_low, unsigned off_high)
237{
238 MemoryRegionPortioList *mrpio;
239 unsigned i;
240
241
242 mrpio = g_malloc0(sizeof(MemoryRegionPortioList) +
243 sizeof(MemoryRegionPortio) * (count + 1));
244 mrpio->portio_opaque = piolist->opaque;
245 memcpy(mrpio->ports, pio_init, sizeof(MemoryRegionPortio) * count);
246 memset(mrpio->ports + count, 0, sizeof(MemoryRegionPortio));
247
248
249 for (i = 0; i < count; ++i) {
250 mrpio->ports[i].offset -= off_low;
251 mrpio->ports[i].base = start + off_low;
252 }
253
254 memory_region_init_io(&mrpio->mr, piolist->owner, &portio_ops, mrpio,
255 piolist->name, off_high - off_low);
256 if (piolist->flush_coalesced_mmio) {
257 memory_region_set_flush_coalesced(&mrpio->mr);
258 }
259 memory_region_add_subregion(piolist->address_space,
260 start + off_low, &mrpio->mr);
261 piolist->regions[piolist->nr] = &mrpio->mr;
262 ++piolist->nr;
263}
264
265void portio_list_add(PortioList *piolist,
266 MemoryRegion *address_space,
267 uint32_t start)
268{
269 const MemoryRegionPortio *pio, *pio_start = piolist->ports;
270 unsigned int off_low, off_high, off_last, count;
271
272 piolist->address_space = address_space;
273
274
275 off_last = off_low = pio_start->offset;
276 off_high = off_low + pio_start->len + pio_start->size - 1;
277 count = 1;
278
279 for (pio = pio_start + 1; pio->size != 0; pio++, count++) {
280
281 assert(pio->offset >= off_last);
282 off_last = pio->offset;
283
284
285 if (off_last > off_high) {
286 portio_list_add_1(piolist, pio_start, count, start, off_low,
287 off_high);
288
289 pio_start = pio;
290 off_low = off_last;
291 off_high = off_low + pio->len + pio_start->size - 1;
292 count = 0;
293 } else if (off_last + pio->len > off_high) {
294 off_high = off_last + pio->len + pio_start->size - 1;
295 }
296 }
297
298
299 portio_list_add_1(piolist, pio_start, count, start, off_low, off_high);
300}
301
302void portio_list_del(PortioList *piolist)
303{
304 MemoryRegionPortioList *mrpio;
305 unsigned i;
306
307 for (i = 0; i < piolist->nr; ++i) {
308 mrpio = container_of(piolist->regions[i], MemoryRegionPortioList, mr);
309 memory_region_del_subregion(piolist->address_space, &mrpio->mr);
310 }
311}
312