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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" | |
28 | #include "sysemu.h" | |
29 | #include "qemu-char.h" | |
30 | #include "hw/qdev.h" | |
31 | #include "device_tree.h" | |
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); | |
b4a78527 DG |
47 | VIOsPAPRDevice *sdev = spapr_vio_find_by_reg(spapr->vio_bus, |
48 | SPAPR_VTY_BASE_ADDRESS); | |
821303f5 DG |
49 | |
50 | if (!sdev) { | |
51 | rtas_st(rets, 0, -1); | |
52 | } else { | |
53 | vty_putchars(sdev, &c, sizeof(c)); | |
54 | rtas_st(rets, 0, 0); | |
55 | } | |
56 | } | |
57 | ||
58 | static void rtas_get_time_of_day(sPAPREnvironment *spapr, | |
59 | uint32_t token, uint32_t nargs, | |
60 | target_ulong args, | |
61 | uint32_t nret, target_ulong rets) | |
62 | { | |
63 | struct tm tm; | |
64 | ||
65 | if (nret != 8) { | |
66 | rtas_st(rets, 0, -3); | |
67 | return; | |
68 | } | |
69 | ||
ac26f8c3 | 70 | qemu_get_timedate(&tm, spapr->rtc_offset); |
821303f5 DG |
71 | |
72 | rtas_st(rets, 0, 0); /* Success */ | |
73 | rtas_st(rets, 1, tm.tm_year + 1900); | |
74 | rtas_st(rets, 2, tm.tm_mon + 1); | |
75 | rtas_st(rets, 3, tm.tm_mday); | |
76 | rtas_st(rets, 4, tm.tm_hour); | |
77 | rtas_st(rets, 5, tm.tm_min); | |
78 | rtas_st(rets, 6, tm.tm_sec); | |
79 | rtas_st(rets, 7, 0); /* we don't do nanoseconds */ | |
80 | } | |
81 | ||
ac26f8c3 BL |
82 | static void rtas_set_time_of_day(sPAPREnvironment *spapr, |
83 | uint32_t token, uint32_t nargs, | |
84 | target_ulong args, | |
85 | uint32_t nret, target_ulong rets) | |
86 | { | |
87 | struct tm tm; | |
88 | ||
89 | tm.tm_year = rtas_ld(args, 0) - 1900; | |
90 | tm.tm_mon = rtas_ld(args, 1) - 1; | |
91 | tm.tm_mday = rtas_ld(args, 2); | |
92 | tm.tm_hour = rtas_ld(args, 3); | |
93 | tm.tm_min = rtas_ld(args, 4); | |
94 | tm.tm_sec = rtas_ld(args, 5); | |
95 | ||
96 | /* Just generate a monitor event for the change */ | |
97 | rtc_change_mon_event(&tm); | |
98 | spapr->rtc_offset = qemu_timedate_diff(&tm); | |
99 | ||
100 | rtas_st(rets, 0, 0); /* Success */ | |
101 | } | |
102 | ||
821303f5 DG |
103 | static void rtas_power_off(sPAPREnvironment *spapr, |
104 | uint32_t token, uint32_t nargs, target_ulong args, | |
105 | uint32_t nret, target_ulong rets) | |
106 | { | |
107 | if (nargs != 2 || nret != 1) { | |
108 | rtas_st(rets, 0, -3); | |
109 | return; | |
110 | } | |
111 | qemu_system_shutdown_request(); | |
112 | rtas_st(rets, 0, 0); | |
113 | } | |
114 | ||
a9f8ad8f DG |
115 | static void rtas_query_cpu_stopped_state(sPAPREnvironment *spapr, |
116 | uint32_t token, uint32_t nargs, | |
117 | target_ulong args, | |
118 | uint32_t nret, target_ulong rets) | |
119 | { | |
120 | target_ulong id; | |
121 | CPUState *env; | |
122 | ||
123 | if (nargs != 1 || nret != 2) { | |
124 | rtas_st(rets, 0, -3); | |
125 | return; | |
126 | } | |
127 | ||
128 | id = rtas_ld(args, 0); | |
129 | for (env = first_cpu; env; env = env->next_cpu) { | |
130 | if (env->cpu_index != id) { | |
131 | continue; | |
132 | } | |
133 | ||
134 | if (env->halted) { | |
135 | rtas_st(rets, 1, 0); | |
136 | } else { | |
137 | rtas_st(rets, 1, 2); | |
138 | } | |
139 | ||
140 | rtas_st(rets, 0, 0); | |
141 | return; | |
142 | } | |
143 | ||
144 | /* Didn't find a matching cpu */ | |
145 | rtas_st(rets, 0, -3); | |
146 | } | |
147 | ||
148 | static void rtas_start_cpu(sPAPREnvironment *spapr, | |
149 | uint32_t token, uint32_t nargs, | |
150 | target_ulong args, | |
151 | uint32_t nret, target_ulong rets) | |
152 | { | |
153 | target_ulong id, start, r3; | |
154 | CPUState *env; | |
155 | ||
156 | if (nargs != 3 || nret != 1) { | |
157 | rtas_st(rets, 0, -3); | |
158 | return; | |
159 | } | |
160 | ||
161 | id = rtas_ld(args, 0); | |
162 | start = rtas_ld(args, 1); | |
163 | r3 = rtas_ld(args, 2); | |
164 | ||
165 | for (env = first_cpu; env; env = env->next_cpu) { | |
166 | if (env->cpu_index != id) { | |
167 | continue; | |
168 | } | |
169 | ||
170 | if (!env->halted) { | |
171 | rtas_st(rets, 0, -1); | |
172 | return; | |
173 | } | |
174 | ||
175 | env->msr = (1ULL << MSR_SF) | (1ULL << MSR_ME); | |
176 | env->nip = start; | |
177 | env->gpr[3] = r3; | |
178 | env->halted = 0; | |
179 | ||
180 | qemu_cpu_kick(env); | |
181 | ||
182 | rtas_st(rets, 0, 0); | |
183 | return; | |
184 | } | |
185 | ||
186 | /* Didn't find a matching cpu */ | |
187 | rtas_st(rets, 0, -3); | |
188 | } | |
189 | ||
39ac8455 DG |
190 | static struct rtas_call { |
191 | const char *name; | |
192 | spapr_rtas_fn fn; | |
193 | } rtas_table[TOKEN_MAX]; | |
194 | ||
195 | struct rtas_call *rtas_next = rtas_table; | |
196 | ||
197 | target_ulong spapr_rtas_call(sPAPREnvironment *spapr, | |
198 | uint32_t token, uint32_t nargs, target_ulong args, | |
199 | uint32_t nret, target_ulong rets) | |
200 | { | |
201 | if ((token >= TOKEN_BASE) | |
202 | && ((token - TOKEN_BASE) < TOKEN_MAX)) { | |
203 | struct rtas_call *call = rtas_table + (token - TOKEN_BASE); | |
204 | ||
205 | if (call->fn) { | |
206 | call->fn(spapr, token, nargs, args, nret, rets); | |
207 | return H_SUCCESS; | |
208 | } | |
209 | } | |
210 | ||
821303f5 DG |
211 | /* HACK: Some Linux early debug code uses RTAS display-character, |
212 | * but assumes the token value is 0xa (which it is on some real | |
213 | * machines) without looking it up in the device tree. This | |
214 | * special case makes this work */ | |
215 | if (token == 0xa) { | |
216 | rtas_display_character(spapr, 0xa, nargs, args, nret, rets); | |
217 | return H_SUCCESS; | |
218 | } | |
219 | ||
39ac8455 DG |
220 | hcall_dprintf("Unknown RTAS token 0x%x\n", token); |
221 | rtas_st(rets, 0, -3); | |
222 | return H_PARAMETER; | |
223 | } | |
224 | ||
225 | void spapr_rtas_register(const char *name, spapr_rtas_fn fn) | |
226 | { | |
227 | assert(rtas_next < (rtas_table + TOKEN_MAX)); | |
228 | ||
229 | rtas_next->name = name; | |
230 | rtas_next->fn = fn; | |
231 | ||
232 | rtas_next++; | |
233 | } | |
234 | ||
235 | int spapr_rtas_device_tree_setup(void *fdt, target_phys_addr_t rtas_addr, | |
236 | target_phys_addr_t rtas_size) | |
237 | { | |
238 | int ret; | |
239 | int i; | |
240 | ||
241 | ret = fdt_add_mem_rsv(fdt, rtas_addr, rtas_size); | |
242 | if (ret < 0) { | |
243 | fprintf(stderr, "Couldn't add RTAS reserve entry: %s\n", | |
244 | fdt_strerror(ret)); | |
245 | return ret; | |
246 | } | |
247 | ||
248 | ret = qemu_devtree_setprop_cell(fdt, "/rtas", "linux,rtas-base", | |
249 | rtas_addr); | |
250 | if (ret < 0) { | |
251 | fprintf(stderr, "Couldn't add linux,rtas-base property: %s\n", | |
252 | fdt_strerror(ret)); | |
253 | return ret; | |
254 | } | |
255 | ||
256 | ret = qemu_devtree_setprop_cell(fdt, "/rtas", "linux,rtas-entry", | |
257 | rtas_addr); | |
258 | if (ret < 0) { | |
259 | fprintf(stderr, "Couldn't add linux,rtas-entry property: %s\n", | |
260 | fdt_strerror(ret)); | |
261 | return ret; | |
262 | } | |
263 | ||
264 | ret = qemu_devtree_setprop_cell(fdt, "/rtas", "rtas-size", | |
265 | rtas_size); | |
266 | if (ret < 0) { | |
267 | fprintf(stderr, "Couldn't add rtas-size property: %s\n", | |
268 | fdt_strerror(ret)); | |
269 | return ret; | |
270 | } | |
271 | ||
272 | for (i = 0; i < TOKEN_MAX; i++) { | |
273 | struct rtas_call *call = &rtas_table[i]; | |
274 | ||
275 | if (!call->fn) { | |
276 | continue; | |
277 | } | |
278 | ||
279 | ret = qemu_devtree_setprop_cell(fdt, "/rtas", call->name, | |
280 | i + TOKEN_BASE); | |
281 | if (ret < 0) { | |
282 | fprintf(stderr, "Couldn't add rtas token for %s: %s\n", | |
283 | call->name, fdt_strerror(ret)); | |
284 | return ret; | |
285 | } | |
286 | ||
287 | } | |
288 | return 0; | |
289 | } | |
821303f5 | 290 | |
83f7d43a | 291 | static void core_rtas_register_types(void) |
821303f5 DG |
292 | { |
293 | spapr_rtas_register("display-character", rtas_display_character); | |
294 | spapr_rtas_register("get-time-of-day", rtas_get_time_of_day); | |
ac26f8c3 | 295 | spapr_rtas_register("set-time-of-day", rtas_set_time_of_day); |
821303f5 | 296 | spapr_rtas_register("power-off", rtas_power_off); |
a9f8ad8f DG |
297 | spapr_rtas_register("query-cpu-stopped-state", |
298 | rtas_query_cpu_stopped_state); | |
299 | spapr_rtas_register("start-cpu", rtas_start_cpu); | |
821303f5 | 300 | } |
83f7d43a AF |
301 | |
302 | type_init(core_rtas_register_types) |