jcs.org
qemu with hax to log dma reads & writes
jcs.org/2018/11/12/vfio
1/*
2 * QEMU PReP System I/O emulation
3 *
4 * Copyright (c) 2017 Hervé Poussineau
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#include "qemu/osdep.h"
26#include "hw/irq.h"
27#include "hw/isa/isa.h"
28#include "hw/qdev-properties.h"
29#include "migration/vmstate.h"
30#include "exec/address-spaces.h"
31#include "qemu/error-report.h" /* for error_report() */
32#include "qemu/module.h"
33#include "sysemu/runstate.h"
34#include "cpu.h"
35#include "trace.h"
36
37#define TYPE_PREP_SYSTEMIO "prep-systemio"
38#define PREP_SYSTEMIO(obj) \
39 OBJECT_CHECK(PrepSystemIoState, (obj), TYPE_PREP_SYSTEMIO)
40
41/* Bit as defined in PowerPC Reference Plaform v1.1, sect. 6.1.5, p. 132 */
42#define PREP_BIT(n) (1 << (7 - (n)))
43
44typedef struct PrepSystemIoState {
45 ISADevice parent_obj;
46 MemoryRegion ppc_parity_mem;
47
48 qemu_irq non_contiguous_io_map_irq;
49 uint8_t sreset; /* 0x0092 */
50 uint8_t equipment; /* 0x080c */
51 uint8_t system_control; /* 0x081c */
52 uint8_t iomap_type; /* 0x0850 */
53 uint8_t ibm_planar_id; /* 0x0852 */
54 qemu_irq softreset_irq;
55 PortioList portio;
56} PrepSystemIoState;
57
58/* PORT 0092 -- Special Port 92 (Read/Write) */
59
60enum {
61 PORT0092_SOFTRESET = PREP_BIT(7),
62 PORT0092_LE_MODE = PREP_BIT(6),
63};
64
65static void prep_port0092_write(void *opaque, uint32_t addr, uint32_t val)
66{
67 PrepSystemIoState *s = opaque;
68
69 trace_prep_systemio_write(addr, val);
70
71 s->sreset = val & PORT0092_SOFTRESET;
72 qemu_set_irq(s->softreset_irq, s->sreset);
73
74 if ((val & PORT0092_LE_MODE) != 0) {
75 /* XXX Not supported yet */
76 error_report("little-endian mode not supported");
77 vm_stop(RUN_STATE_PAUSED);
78 } else {
79 /* Nothing to do */
80 }
81}
82
83static uint32_t prep_port0092_read(void *opaque, uint32_t addr)
84{
85 PrepSystemIoState *s = opaque;
86 trace_prep_systemio_read(addr, s->sreset);
87 return s->sreset;
88}
89
90/* PORT 0808 -- Hardfile Light Register (Write Only) */
91
92enum {
93 PORT0808_HARDFILE_LIGHT_ON = PREP_BIT(7),
94};
95
96static void prep_port0808_write(void *opaque, uint32_t addr, uint32_t val)
97{
98 trace_prep_systemio_write(addr, val);
99}
100
101/* PORT 0810 -- Password Protect 1 Register (Write Only) */
102
103/* reset by port 0x4D in the SIO */
104static void prep_port0810_write(void *opaque, uint32_t addr, uint32_t val)
105{
106 trace_prep_systemio_write(addr, val);
107}
108
109/* PORT 0812 -- Password Protect 2 Register (Write Only) */
110
111/* reset by port 0x4D in the SIO */
112static void prep_port0812_write(void *opaque, uint32_t addr, uint32_t val)
113{
114 trace_prep_systemio_write(addr, val);
115}
116
117/* PORT 0814 -- L2 Invalidate Register (Write Only) */
118
119static void prep_port0814_write(void *opaque, uint32_t addr, uint32_t val)
120{
121 trace_prep_systemio_write(addr, val);
122}
123
124/* PORT 0818 -- Reserved for Keylock (Read Only) */
125
126enum {
127 PORT0818_KEYLOCK_SIGNAL_HIGH = PREP_BIT(7),
128};
129
130static uint32_t prep_port0818_read(void *opaque, uint32_t addr)
131{
132 uint32_t val = 0;
133 trace_prep_systemio_read(addr, val);
134 return val;
135}
136
137/* PORT 080C -- Equipment */
138
139enum {
140 PORT080C_SCSIFUSE = PREP_BIT(1),
141 PORT080C_L2_COPYBACK = PREP_BIT(4),
142 PORT080C_L2_256 = PREP_BIT(5),
143 PORT080C_UPGRADE_CPU = PREP_BIT(6),
144 PORT080C_L2 = PREP_BIT(7),
145};
146
147static uint32_t prep_port080c_read(void *opaque, uint32_t addr)
148{
149 PrepSystemIoState *s = opaque;
150 trace_prep_systemio_read(addr, s->equipment);
151 return s->equipment;
152}
153
154/* PORT 081C -- System Control Register (Read/Write) */
155
156enum {
157 PORT081C_FLOPPY_MOTOR_INHIBIT = PREP_BIT(3),
158 PORT081C_MASK_TEA = PREP_BIT(2),
159 PORT081C_L2_UPDATE_INHIBIT = PREP_BIT(1),
160 PORT081C_L2_CACHEMISS_INHIBIT = PREP_BIT(0),
161};
162
163static void prep_port081c_write(void *opaque, uint32_t addr, uint32_t val)
164{
165 static const uint8_t mask = PORT081C_FLOPPY_MOTOR_INHIBIT |
166 PORT081C_MASK_TEA |
167 PORT081C_L2_UPDATE_INHIBIT |
168 PORT081C_L2_CACHEMISS_INHIBIT;
169 PrepSystemIoState *s = opaque;
170 trace_prep_systemio_write(addr, val);
171 s->system_control = val & mask;
172}
173
174static uint32_t prep_port081c_read(void *opaque, uint32_t addr)
175{
176 PrepSystemIoState *s = opaque;
177 trace_prep_systemio_read(addr, s->system_control);
178 return s->system_control;
179}
180
181/* System Board Identification */
182
183static uint32_t prep_port0852_read(void *opaque, uint32_t addr)
184{
185 PrepSystemIoState *s = opaque;
186 trace_prep_systemio_read(addr, s->ibm_planar_id);
187 return s->ibm_planar_id;
188}
189
190/* PORT 0850 -- I/O Map Type Register (Read/Write) */
191
192enum {
193 PORT0850_IOMAP_NONCONTIGUOUS = PREP_BIT(7),
194};
195
196static uint32_t prep_port0850_read(void *opaque, uint32_t addr)
197{
198 PrepSystemIoState *s = opaque;
199 trace_prep_systemio_read(addr, s->iomap_type);
200 return s->iomap_type;
201}
202
203static void prep_port0850_write(void *opaque, uint32_t addr, uint32_t val)
204{
205 PrepSystemIoState *s = opaque;
206
207 trace_prep_systemio_write(addr, val);
208 qemu_set_irq(s->non_contiguous_io_map_irq,
209 val & PORT0850_IOMAP_NONCONTIGUOUS);
210 s->iomap_type = val & PORT0850_IOMAP_NONCONTIGUOUS;
211}
212
213static const MemoryRegionPortio ppc_io800_port_list[] = {
214 { 0x092, 1, 1, .read = prep_port0092_read,
215 .write = prep_port0092_write, },
216 { 0x808, 1, 1, .write = prep_port0808_write, },
217 { 0x80c, 1, 1, .read = prep_port080c_read, },
218 { 0x810, 1, 1, .write = prep_port0810_write, },
219 { 0x812, 1, 1, .write = prep_port0812_write, },
220 { 0x814, 1, 1, .write = prep_port0814_write, },
221 { 0x818, 1, 1, .read = prep_port0818_read },
222 { 0x81c, 1, 1, .read = prep_port081c_read,
223 .write = prep_port081c_write, },
224 { 0x850, 1, 1, .read = prep_port0850_read,
225 .write = prep_port0850_write, },
226 { 0x852, 1, 1, .read = prep_port0852_read, },
227 PORTIO_END_OF_LIST()
228};
229
230static uint64_t ppc_parity_error_readl(void *opaque, hwaddr addr,
231 unsigned int size)
232{
233 uint32_t val = 0;
234 trace_prep_systemio_read((unsigned int)addr, val);
235 return val;
236}
237
238static const MemoryRegionOps ppc_parity_error_ops = {
239 .read = ppc_parity_error_readl,
240 .valid = {
241 .min_access_size = 4,
242 .max_access_size = 4,
243 },
244};
245
246static void prep_systemio_realize(DeviceState *dev, Error **errp)
247{
248 ISADevice *isa = ISA_DEVICE(dev);
249 PrepSystemIoState *s = PREP_SYSTEMIO(dev);
250 PowerPCCPU *cpu;
251
252 qdev_init_gpio_out(dev, &s->non_contiguous_io_map_irq, 1);
253 s->iomap_type = PORT0850_IOMAP_NONCONTIGUOUS;
254 qemu_set_irq(s->non_contiguous_io_map_irq,
255 s->iomap_type & PORT0850_IOMAP_NONCONTIGUOUS);
256 cpu = POWERPC_CPU(first_cpu);
257 s->softreset_irq = cpu->env.irq_inputs[PPC6xx_INPUT_HRESET];
258
259 isa_register_portio_list(isa, &s->portio, 0x0, ppc_io800_port_list, s,
260 "systemio800");
261
262 memory_region_init_io(&s->ppc_parity_mem, OBJECT(dev),
263 &ppc_parity_error_ops, s, "ppc-parity", 0x4);
264 memory_region_add_subregion(get_system_memory(), 0xbfffeff0,
265 &s->ppc_parity_mem);
266}
267
268static const VMStateDescription vmstate_prep_systemio = {
269 .name = "prep_systemio",
270 .version_id = 1,
271 .minimum_version_id = 1,
272 .fields = (VMStateField[]) {
273 VMSTATE_UINT8(sreset, PrepSystemIoState),
274 VMSTATE_UINT8(system_control, PrepSystemIoState),
275 VMSTATE_UINT8(iomap_type, PrepSystemIoState),
276 VMSTATE_END_OF_LIST()
277 },
278};
279
280static Property prep_systemio_properties[] = {
281 DEFINE_PROP_UINT8("ibm-planar-id", PrepSystemIoState, ibm_planar_id, 0),
282 DEFINE_PROP_UINT8("equipment", PrepSystemIoState, equipment, 0),
283 DEFINE_PROP_END_OF_LIST()
284};
285
286static void prep_systemio_class_initfn(ObjectClass *klass, void *data)
287{
288 DeviceClass *dc = DEVICE_CLASS(klass);
289
290 dc->realize = prep_systemio_realize;
291 dc->vmsd = &vmstate_prep_systemio;
292 device_class_set_props(dc, prep_systemio_properties);
293}
294
295static TypeInfo prep_systemio800_info = {
296 .name = TYPE_PREP_SYSTEMIO,
297 .parent = TYPE_ISA_DEVICE,
298 .instance_size = sizeof(PrepSystemIoState),
299 .class_init = prep_systemio_class_initfn,
300};
301
302static void prep_systemio_register_types(void)
303{
304 type_register_static(&prep_systemio800_info);
305}
306
307type_init(prep_systemio_register_types)