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39ac8455 DG |
1 | /* |
2 | * QEMU PowerPC pSeries Logical Partition (aka sPAPR) hardware System Emulator | |
3 | * | |
4 | * Hypercall based emulated RTAS | |
5 | * | |
6 | * Copyright (c) 2010-2011 David Gibson, IBM Corporation. | |
7 | * | |
8 | * Permission is hereby granted, free of charge, to any person obtaining a copy | |
9 | * of this software and associated documentation files (the "Software"), to deal | |
10 | * in the Software without restriction, including without limitation the rights | |
11 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
12 | * copies of the Software, and to permit persons to whom the Software is | |
13 | * furnished to do so, subject to the following conditions: | |
14 | * | |
15 | * The above copyright notice and this permission notice shall be included in | |
16 | * all copies or substantial portions of the Software. | |
17 | * | |
18 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
19 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
20 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
21 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
22 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
23 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN | |
24 | * THE SOFTWARE. | |
25 | * | |
26 | */ | |
27 | #include "cpu.h" | |
9c17d615 | 28 | #include "sysemu/sysemu.h" |
927d4878 | 29 | #include "char/char.h" |
39ac8455 | 30 | #include "hw/qdev.h" |
9c17d615 | 31 | #include "sysemu/device_tree.h" |
39ac8455 DG |
32 | |
33 | #include "hw/spapr.h" | |
34 | #include "hw/spapr_vio.h" | |
35 | ||
36 | #include <libfdt.h> | |
37 | ||
38 | #define TOKEN_BASE 0x2000 | |
39 | #define TOKEN_MAX 0x100 | |
40 | ||
821303f5 DG |
41 | static void rtas_display_character(sPAPREnvironment *spapr, |
42 | uint32_t token, uint32_t nargs, | |
43 | target_ulong args, | |
44 | uint32_t nret, target_ulong rets) | |
45 | { | |
46 | uint8_t c = rtas_ld(args, 0); | |
5f2e2ba2 | 47 | VIOsPAPRDevice *sdev = vty_lookup(spapr, 0); |
821303f5 DG |
48 | |
49 | if (!sdev) { | |
50 | rtas_st(rets, 0, -1); | |
51 | } else { | |
52 | vty_putchars(sdev, &c, sizeof(c)); | |
53 | rtas_st(rets, 0, 0); | |
54 | } | |
55 | } | |
56 | ||
57 | static void rtas_get_time_of_day(sPAPREnvironment *spapr, | |
58 | uint32_t token, uint32_t nargs, | |
59 | target_ulong args, | |
60 | uint32_t nret, target_ulong rets) | |
61 | { | |
62 | struct tm tm; | |
63 | ||
64 | if (nret != 8) { | |
65 | rtas_st(rets, 0, -3); | |
66 | return; | |
67 | } | |
68 | ||
ac26f8c3 | 69 | qemu_get_timedate(&tm, spapr->rtc_offset); |
821303f5 DG |
70 | |
71 | rtas_st(rets, 0, 0); /* Success */ | |
72 | rtas_st(rets, 1, tm.tm_year + 1900); | |
73 | rtas_st(rets, 2, tm.tm_mon + 1); | |
74 | rtas_st(rets, 3, tm.tm_mday); | |
75 | rtas_st(rets, 4, tm.tm_hour); | |
76 | rtas_st(rets, 5, tm.tm_min); | |
77 | rtas_st(rets, 6, tm.tm_sec); | |
78 | rtas_st(rets, 7, 0); /* we don't do nanoseconds */ | |
79 | } | |
80 | ||
ac26f8c3 BL |
81 | static void rtas_set_time_of_day(sPAPREnvironment *spapr, |
82 | uint32_t token, uint32_t nargs, | |
83 | target_ulong args, | |
84 | uint32_t nret, target_ulong rets) | |
85 | { | |
86 | struct tm tm; | |
87 | ||
88 | tm.tm_year = rtas_ld(args, 0) - 1900; | |
89 | tm.tm_mon = rtas_ld(args, 1) - 1; | |
90 | tm.tm_mday = rtas_ld(args, 2); | |
91 | tm.tm_hour = rtas_ld(args, 3); | |
92 | tm.tm_min = rtas_ld(args, 4); | |
93 | tm.tm_sec = rtas_ld(args, 5); | |
94 | ||
95 | /* Just generate a monitor event for the change */ | |
96 | rtc_change_mon_event(&tm); | |
97 | spapr->rtc_offset = qemu_timedate_diff(&tm); | |
98 | ||
99 | rtas_st(rets, 0, 0); /* Success */ | |
100 | } | |
101 | ||
821303f5 DG |
102 | static void rtas_power_off(sPAPREnvironment *spapr, |
103 | uint32_t token, uint32_t nargs, target_ulong args, | |
104 | uint32_t nret, target_ulong rets) | |
105 | { | |
106 | if (nargs != 2 || nret != 1) { | |
107 | rtas_st(rets, 0, -3); | |
108 | return; | |
109 | } | |
110 | qemu_system_shutdown_request(); | |
111 | rtas_st(rets, 0, 0); | |
112 | } | |
113 | ||
c821a43c DG |
114 | static void rtas_system_reboot(sPAPREnvironment *spapr, |
115 | uint32_t token, uint32_t nargs, | |
116 | target_ulong args, | |
117 | uint32_t nret, target_ulong rets) | |
118 | { | |
119 | if (nargs != 0 || nret != 1) { | |
120 | rtas_st(rets, 0, -3); | |
121 | return; | |
122 | } | |
123 | qemu_system_reset_request(); | |
124 | rtas_st(rets, 0, 0); | |
125 | } | |
126 | ||
a9f8ad8f DG |
127 | static void rtas_query_cpu_stopped_state(sPAPREnvironment *spapr, |
128 | uint32_t token, uint32_t nargs, | |
129 | target_ulong args, | |
130 | uint32_t nret, target_ulong rets) | |
131 | { | |
132 | target_ulong id; | |
e2684c0b | 133 | CPUPPCState *env; |
55e5c285 | 134 | CPUState *cpu; |
a9f8ad8f DG |
135 | |
136 | if (nargs != 1 || nret != 2) { | |
137 | rtas_st(rets, 0, -3); | |
138 | return; | |
139 | } | |
140 | ||
141 | id = rtas_ld(args, 0); | |
142 | for (env = first_cpu; env; env = env->next_cpu) { | |
55e5c285 AF |
143 | cpu = CPU(ppc_env_get_cpu(env)); |
144 | if (cpu->cpu_index != id) { | |
a9f8ad8f DG |
145 | continue; |
146 | } | |
147 | ||
148 | if (env->halted) { | |
149 | rtas_st(rets, 1, 0); | |
150 | } else { | |
151 | rtas_st(rets, 1, 2); | |
152 | } | |
153 | ||
154 | rtas_st(rets, 0, 0); | |
155 | return; | |
156 | } | |
157 | ||
158 | /* Didn't find a matching cpu */ | |
159 | rtas_st(rets, 0, -3); | |
160 | } | |
161 | ||
162 | static void rtas_start_cpu(sPAPREnvironment *spapr, | |
163 | uint32_t token, uint32_t nargs, | |
164 | target_ulong args, | |
165 | uint32_t nret, target_ulong rets) | |
166 | { | |
167 | target_ulong id, start, r3; | |
c08d7424 | 168 | CPUState *cpu; |
e2684c0b | 169 | CPUPPCState *env; |
a9f8ad8f DG |
170 | |
171 | if (nargs != 3 || nret != 1) { | |
172 | rtas_st(rets, 0, -3); | |
173 | return; | |
174 | } | |
175 | ||
176 | id = rtas_ld(args, 0); | |
177 | start = rtas_ld(args, 1); | |
178 | r3 = rtas_ld(args, 2); | |
179 | ||
180 | for (env = first_cpu; env; env = env->next_cpu) { | |
55e5c285 | 181 | cpu = CPU(ppc_env_get_cpu(env)); |
c08d7424 | 182 | |
55e5c285 | 183 | if (cpu->cpu_index != id) { |
a9f8ad8f DG |
184 | continue; |
185 | } | |
186 | ||
187 | if (!env->halted) { | |
188 | rtas_st(rets, 0, -1); | |
189 | return; | |
190 | } | |
191 | ||
048706d9 DG |
192 | /* This will make sure qemu state is up to date with kvm, and |
193 | * mark it dirty so our changes get flushed back before the | |
194 | * new cpu enters */ | |
195 | kvm_cpu_synchronize_state(env); | |
196 | ||
a9f8ad8f DG |
197 | env->msr = (1ULL << MSR_SF) | (1ULL << MSR_ME); |
198 | env->nip = start; | |
199 | env->gpr[3] = r3; | |
200 | env->halted = 0; | |
201 | ||
c08d7424 | 202 | qemu_cpu_kick(cpu); |
a9f8ad8f DG |
203 | |
204 | rtas_st(rets, 0, 0); | |
205 | return; | |
206 | } | |
207 | ||
208 | /* Didn't find a matching cpu */ | |
209 | rtas_st(rets, 0, -3); | |
210 | } | |
211 | ||
39ac8455 DG |
212 | static struct rtas_call { |
213 | const char *name; | |
214 | spapr_rtas_fn fn; | |
215 | } rtas_table[TOKEN_MAX]; | |
216 | ||
217 | struct rtas_call *rtas_next = rtas_table; | |
218 | ||
219 | target_ulong spapr_rtas_call(sPAPREnvironment *spapr, | |
220 | uint32_t token, uint32_t nargs, target_ulong args, | |
221 | uint32_t nret, target_ulong rets) | |
222 | { | |
223 | if ((token >= TOKEN_BASE) | |
224 | && ((token - TOKEN_BASE) < TOKEN_MAX)) { | |
225 | struct rtas_call *call = rtas_table + (token - TOKEN_BASE); | |
226 | ||
227 | if (call->fn) { | |
228 | call->fn(spapr, token, nargs, args, nret, rets); | |
229 | return H_SUCCESS; | |
230 | } | |
231 | } | |
232 | ||
821303f5 DG |
233 | /* HACK: Some Linux early debug code uses RTAS display-character, |
234 | * but assumes the token value is 0xa (which it is on some real | |
235 | * machines) without looking it up in the device tree. This | |
236 | * special case makes this work */ | |
237 | if (token == 0xa) { | |
238 | rtas_display_character(spapr, 0xa, nargs, args, nret, rets); | |
239 | return H_SUCCESS; | |
240 | } | |
241 | ||
39ac8455 DG |
242 | hcall_dprintf("Unknown RTAS token 0x%x\n", token); |
243 | rtas_st(rets, 0, -3); | |
244 | return H_PARAMETER; | |
245 | } | |
246 | ||
4aac82c3 | 247 | int spapr_rtas_register(const char *name, spapr_rtas_fn fn) |
39ac8455 | 248 | { |
c89d5299 DG |
249 | int i; |
250 | ||
251 | for (i = 0; i < (rtas_next - rtas_table); i++) { | |
252 | if (strcmp(name, rtas_table[i].name) == 0) { | |
253 | fprintf(stderr, "RTAS call \"%s\" registered twice\n", name); | |
254 | exit(1); | |
255 | } | |
256 | } | |
257 | ||
39ac8455 DG |
258 | assert(rtas_next < (rtas_table + TOKEN_MAX)); |
259 | ||
260 | rtas_next->name = name; | |
261 | rtas_next->fn = fn; | |
262 | ||
4aac82c3 | 263 | return (rtas_next++ - rtas_table) + TOKEN_BASE; |
39ac8455 DG |
264 | } |
265 | ||
a8170e5e AK |
266 | int spapr_rtas_device_tree_setup(void *fdt, hwaddr rtas_addr, |
267 | hwaddr rtas_size) | |
39ac8455 DG |
268 | { |
269 | int ret; | |
270 | int i; | |
271 | ||
272 | ret = fdt_add_mem_rsv(fdt, rtas_addr, rtas_size); | |
273 | if (ret < 0) { | |
274 | fprintf(stderr, "Couldn't add RTAS reserve entry: %s\n", | |
275 | fdt_strerror(ret)); | |
276 | return ret; | |
277 | } | |
278 | ||
279 | ret = qemu_devtree_setprop_cell(fdt, "/rtas", "linux,rtas-base", | |
280 | rtas_addr); | |
281 | if (ret < 0) { | |
282 | fprintf(stderr, "Couldn't add linux,rtas-base property: %s\n", | |
283 | fdt_strerror(ret)); | |
284 | return ret; | |
285 | } | |
286 | ||
287 | ret = qemu_devtree_setprop_cell(fdt, "/rtas", "linux,rtas-entry", | |
288 | rtas_addr); | |
289 | if (ret < 0) { | |
290 | fprintf(stderr, "Couldn't add linux,rtas-entry property: %s\n", | |
291 | fdt_strerror(ret)); | |
292 | return ret; | |
293 | } | |
294 | ||
295 | ret = qemu_devtree_setprop_cell(fdt, "/rtas", "rtas-size", | |
296 | rtas_size); | |
297 | if (ret < 0) { | |
298 | fprintf(stderr, "Couldn't add rtas-size property: %s\n", | |
299 | fdt_strerror(ret)); | |
300 | return ret; | |
301 | } | |
302 | ||
303 | for (i = 0; i < TOKEN_MAX; i++) { | |
304 | struct rtas_call *call = &rtas_table[i]; | |
305 | ||
d36b66f7 | 306 | if (!call->name) { |
39ac8455 DG |
307 | continue; |
308 | } | |
309 | ||
310 | ret = qemu_devtree_setprop_cell(fdt, "/rtas", call->name, | |
311 | i + TOKEN_BASE); | |
312 | if (ret < 0) { | |
313 | fprintf(stderr, "Couldn't add rtas token for %s: %s\n", | |
314 | call->name, fdt_strerror(ret)); | |
315 | return ret; | |
316 | } | |
317 | ||
318 | } | |
319 | return 0; | |
320 | } | |
821303f5 | 321 | |
83f7d43a | 322 | static void core_rtas_register_types(void) |
821303f5 DG |
323 | { |
324 | spapr_rtas_register("display-character", rtas_display_character); | |
325 | spapr_rtas_register("get-time-of-day", rtas_get_time_of_day); | |
ac26f8c3 | 326 | spapr_rtas_register("set-time-of-day", rtas_set_time_of_day); |
821303f5 | 327 | spapr_rtas_register("power-off", rtas_power_off); |
c821a43c | 328 | spapr_rtas_register("system-reboot", rtas_system_reboot); |
a9f8ad8f DG |
329 | spapr_rtas_register("query-cpu-stopped-state", |
330 | rtas_query_cpu_stopped_state); | |
331 | spapr_rtas_register("start-cpu", rtas_start_cpu); | |
821303f5 | 332 | } |
83f7d43a AF |
333 | |
334 | type_init(core_rtas_register_types) |