]>
Commit | Line | Data |
---|---|---|
d2f84152 HP |
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/isa/isa.h" | |
27 | #include "exec/address-spaces.h" | |
28 | #include "qemu/error-report.h" /* for error_report() */ | |
0b8fa32f | 29 | #include "qemu/module.h" |
d2f84152 HP |
30 | #include "sysemu/sysemu.h" /* for vm_stop() */ |
31 | #include "cpu.h" | |
32 | #include "trace.h" | |
33 | ||
34 | #define TYPE_PREP_SYSTEMIO "prep-systemio" | |
35 | #define PREP_SYSTEMIO(obj) \ | |
36 | OBJECT_CHECK(PrepSystemIoState, (obj), TYPE_PREP_SYSTEMIO) | |
37 | ||
38 | /* Bit as defined in PowerPC Reference Plaform v1.1, sect. 6.1.5, p. 132 */ | |
39 | #define PREP_BIT(n) (1 << (7 - (n))) | |
40 | ||
41 | typedef struct PrepSystemIoState { | |
42 | ISADevice parent_obj; | |
43 | MemoryRegion ppc_parity_mem; | |
44 | ||
45 | qemu_irq non_contiguous_io_map_irq; | |
46 | uint8_t sreset; /* 0x0092 */ | |
47 | uint8_t equipment; /* 0x080c */ | |
48 | uint8_t system_control; /* 0x081c */ | |
49 | uint8_t iomap_type; /* 0x0850 */ | |
50 | uint8_t ibm_planar_id; /* 0x0852 */ | |
51 | qemu_irq softreset_irq; | |
52 | PortioList portio; | |
53 | } PrepSystemIoState; | |
54 | ||
55 | /* PORT 0092 -- Special Port 92 (Read/Write) */ | |
56 | ||
57 | enum { | |
58 | PORT0092_SOFTRESET = PREP_BIT(7), | |
59 | PORT0092_LE_MODE = PREP_BIT(6), | |
60 | }; | |
61 | ||
62 | static void prep_port0092_write(void *opaque, uint32_t addr, uint32_t val) | |
63 | { | |
64 | PrepSystemIoState *s = opaque; | |
65 | ||
66 | trace_prep_systemio_write(addr, val); | |
67 | ||
68 | s->sreset = val & PORT0092_SOFTRESET; | |
69 | qemu_set_irq(s->softreset_irq, s->sreset); | |
70 | ||
71 | if ((val & PORT0092_LE_MODE) != 0) { | |
72 | /* XXX Not supported yet */ | |
73 | error_report("little-endian mode not supported"); | |
74 | vm_stop(RUN_STATE_PAUSED); | |
75 | } else { | |
76 | /* Nothing to do */ | |
77 | } | |
78 | } | |
79 | ||
80 | static uint32_t prep_port0092_read(void *opaque, uint32_t addr) | |
81 | { | |
82 | PrepSystemIoState *s = opaque; | |
83 | trace_prep_systemio_read(addr, s->sreset); | |
84 | return s->sreset; | |
85 | } | |
86 | ||
87 | /* PORT 0808 -- Hardfile Light Register (Write Only) */ | |
88 | ||
89 | enum { | |
90 | PORT0808_HARDFILE_LIGHT_ON = PREP_BIT(7), | |
91 | }; | |
92 | ||
93 | static void prep_port0808_write(void *opaque, uint32_t addr, uint32_t val) | |
94 | { | |
95 | trace_prep_systemio_write(addr, val); | |
96 | } | |
97 | ||
98 | /* PORT 0810 -- Password Protect 1 Register (Write Only) */ | |
99 | ||
100 | /* reset by port 0x4D in the SIO */ | |
101 | static void prep_port0810_write(void *opaque, uint32_t addr, uint32_t val) | |
102 | { | |
103 | trace_prep_systemio_write(addr, val); | |
104 | } | |
105 | ||
106 | /* PORT 0812 -- Password Protect 2 Register (Write Only) */ | |
107 | ||
108 | /* reset by port 0x4D in the SIO */ | |
109 | static void prep_port0812_write(void *opaque, uint32_t addr, uint32_t val) | |
110 | { | |
111 | trace_prep_systemio_write(addr, val); | |
112 | } | |
113 | ||
114 | /* PORT 0814 -- L2 Invalidate Register (Write Only) */ | |
115 | ||
116 | static void prep_port0814_write(void *opaque, uint32_t addr, uint32_t val) | |
117 | { | |
118 | trace_prep_systemio_write(addr, val); | |
119 | } | |
120 | ||
121 | /* PORT 0818 -- Reserved for Keylock (Read Only) */ | |
122 | ||
123 | enum { | |
124 | PORT0818_KEYLOCK_SIGNAL_HIGH = PREP_BIT(7), | |
125 | }; | |
126 | ||
127 | static uint32_t prep_port0818_read(void *opaque, uint32_t addr) | |
128 | { | |
129 | uint32_t val = 0; | |
130 | trace_prep_systemio_read(addr, val); | |
131 | return val; | |
132 | } | |
133 | ||
134 | /* PORT 080C -- Equipment */ | |
135 | ||
136 | enum { | |
137 | PORT080C_SCSIFUSE = PREP_BIT(1), | |
138 | PORT080C_L2_COPYBACK = PREP_BIT(4), | |
139 | PORT080C_L2_256 = PREP_BIT(5), | |
140 | PORT080C_UPGRADE_CPU = PREP_BIT(6), | |
141 | PORT080C_L2 = PREP_BIT(7), | |
142 | }; | |
143 | ||
144 | static uint32_t prep_port080c_read(void *opaque, uint32_t addr) | |
145 | { | |
146 | PrepSystemIoState *s = opaque; | |
147 | trace_prep_systemio_read(addr, s->equipment); | |
148 | return s->equipment; | |
149 | } | |
150 | ||
151 | /* PORT 081C -- System Control Register (Read/Write) */ | |
152 | ||
153 | enum { | |
154 | PORT081C_FLOPPY_MOTOR_INHIBIT = PREP_BIT(3), | |
155 | PORT081C_MASK_TEA = PREP_BIT(2), | |
156 | PORT081C_L2_UPDATE_INHIBIT = PREP_BIT(1), | |
157 | PORT081C_L2_CACHEMISS_INHIBIT = PREP_BIT(0), | |
158 | }; | |
159 | ||
160 | static void prep_port081c_write(void *opaque, uint32_t addr, uint32_t val) | |
161 | { | |
162 | static const uint8_t mask = PORT081C_FLOPPY_MOTOR_INHIBIT | | |
163 | PORT081C_MASK_TEA | | |
164 | PORT081C_L2_UPDATE_INHIBIT | | |
165 | PORT081C_L2_CACHEMISS_INHIBIT; | |
166 | PrepSystemIoState *s = opaque; | |
167 | trace_prep_systemio_write(addr, val); | |
168 | s->system_control = val & mask; | |
169 | } | |
170 | ||
171 | static uint32_t prep_port081c_read(void *opaque, uint32_t addr) | |
172 | { | |
173 | PrepSystemIoState *s = opaque; | |
174 | trace_prep_systemio_read(addr, s->system_control); | |
175 | return s->system_control; | |
176 | } | |
177 | ||
178 | /* System Board Identification */ | |
179 | ||
180 | static uint32_t prep_port0852_read(void *opaque, uint32_t addr) | |
181 | { | |
182 | PrepSystemIoState *s = opaque; | |
183 | trace_prep_systemio_read(addr, s->ibm_planar_id); | |
184 | return s->ibm_planar_id; | |
185 | } | |
186 | ||
187 | /* PORT 0850 -- I/O Map Type Register (Read/Write) */ | |
188 | ||
189 | enum { | |
190 | PORT0850_IOMAP_NONCONTIGUOUS = PREP_BIT(7), | |
191 | }; | |
192 | ||
193 | static uint32_t prep_port0850_read(void *opaque, uint32_t addr) | |
194 | { | |
195 | PrepSystemIoState *s = opaque; | |
196 | trace_prep_systemio_read(addr, s->iomap_type); | |
197 | return s->iomap_type; | |
198 | } | |
199 | ||
200 | static void prep_port0850_write(void *opaque, uint32_t addr, uint32_t val) | |
201 | { | |
202 | PrepSystemIoState *s = opaque; | |
203 | ||
204 | trace_prep_systemio_write(addr, val); | |
205 | qemu_set_irq(s->non_contiguous_io_map_irq, | |
206 | val & PORT0850_IOMAP_NONCONTIGUOUS); | |
207 | s->iomap_type = val & PORT0850_IOMAP_NONCONTIGUOUS; | |
208 | } | |
209 | ||
210 | static const MemoryRegionPortio ppc_io800_port_list[] = { | |
211 | { 0x092, 1, 1, .read = prep_port0092_read, | |
212 | .write = prep_port0092_write, }, | |
213 | { 0x808, 1, 1, .write = prep_port0808_write, }, | |
214 | { 0x80c, 1, 1, .read = prep_port080c_read, }, | |
215 | { 0x810, 1, 1, .write = prep_port0810_write, }, | |
216 | { 0x812, 1, 1, .write = prep_port0812_write, }, | |
217 | { 0x814, 1, 1, .write = prep_port0814_write, }, | |
218 | { 0x818, 1, 1, .read = prep_port0818_read }, | |
219 | { 0x81c, 1, 1, .read = prep_port081c_read, | |
220 | .write = prep_port081c_write, }, | |
221 | { 0x850, 1, 1, .read = prep_port0850_read, | |
222 | .write = prep_port0850_write, }, | |
223 | { 0x852, 1, 1, .read = prep_port0852_read, }, | |
224 | PORTIO_END_OF_LIST() | |
225 | }; | |
226 | ||
227 | static uint64_t ppc_parity_error_readl(void *opaque, hwaddr addr, | |
228 | unsigned int size) | |
229 | { | |
230 | uint32_t val = 0; | |
231 | trace_prep_systemio_read((unsigned int)addr, val); | |
232 | return val; | |
233 | } | |
234 | ||
235 | static const MemoryRegionOps ppc_parity_error_ops = { | |
236 | .read = ppc_parity_error_readl, | |
237 | .valid = { | |
238 | .min_access_size = 4, | |
239 | .max_access_size = 4, | |
240 | }, | |
241 | }; | |
242 | ||
243 | static void prep_systemio_realize(DeviceState *dev, Error **errp) | |
244 | { | |
245 | ISADevice *isa = ISA_DEVICE(dev); | |
246 | PrepSystemIoState *s = PREP_SYSTEMIO(dev); | |
247 | PowerPCCPU *cpu; | |
248 | ||
249 | qdev_init_gpio_out(dev, &s->non_contiguous_io_map_irq, 1); | |
250 | s->iomap_type = PORT0850_IOMAP_NONCONTIGUOUS; | |
251 | qemu_set_irq(s->non_contiguous_io_map_irq, | |
252 | s->iomap_type & PORT0850_IOMAP_NONCONTIGUOUS); | |
253 | cpu = POWERPC_CPU(first_cpu); | |
254 | s->softreset_irq = cpu->env.irq_inputs[PPC6xx_INPUT_HRESET]; | |
255 | ||
256 | isa_register_portio_list(isa, &s->portio, 0x0, ppc_io800_port_list, s, | |
257 | "systemio800"); | |
258 | ||
259 | memory_region_init_io(&s->ppc_parity_mem, OBJECT(dev), | |
260 | &ppc_parity_error_ops, s, "ppc-parity", 0x4); | |
261 | memory_region_add_subregion(get_system_memory(), 0xbfffeff0, | |
262 | &s->ppc_parity_mem); | |
263 | } | |
264 | ||
265 | static const VMStateDescription vmstate_prep_systemio = { | |
266 | .name = "prep_systemio", | |
267 | .version_id = 1, | |
268 | .minimum_version_id = 1, | |
269 | .fields = (VMStateField[]) { | |
270 | VMSTATE_UINT8(sreset, PrepSystemIoState), | |
271 | VMSTATE_UINT8(system_control, PrepSystemIoState), | |
272 | VMSTATE_UINT8(iomap_type, PrepSystemIoState), | |
273 | VMSTATE_END_OF_LIST() | |
274 | }, | |
275 | }; | |
276 | ||
277 | static Property prep_systemio_properties[] = { | |
278 | DEFINE_PROP_UINT8("ibm-planar-id", PrepSystemIoState, ibm_planar_id, 0), | |
279 | DEFINE_PROP_UINT8("equipment", PrepSystemIoState, equipment, 0), | |
280 | DEFINE_PROP_END_OF_LIST() | |
281 | }; | |
282 | ||
283 | static void prep_systemio_class_initfn(ObjectClass *klass, void *data) | |
284 | { | |
285 | DeviceClass *dc = DEVICE_CLASS(klass); | |
286 | ||
287 | dc->realize = prep_systemio_realize; | |
288 | dc->vmsd = &vmstate_prep_systemio; | |
289 | dc->props = prep_systemio_properties; | |
290 | } | |
291 | ||
292 | static TypeInfo prep_systemio800_info = { | |
293 | .name = TYPE_PREP_SYSTEMIO, | |
294 | .parent = TYPE_ISA_DEVICE, | |
295 | .instance_size = sizeof(PrepSystemIoState), | |
296 | .class_init = prep_systemio_class_initfn, | |
297 | }; | |
298 | ||
299 | static void prep_systemio_register_types(void) | |
300 | { | |
301 | type_register_static(&prep_systemio800_info); | |
302 | } | |
303 | ||
304 | type_init(prep_systemio_register_types) |