2 * QEMU PowerPC pSeries Logical Partition (aka sPAPR) hardware System Emulator
4 * Hypercall based emulated RTAS
6 * Copyright (c) 2010-2011 David Gibson, IBM Corporation.
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:
15 * The above copyright notice and this permission notice shall be included in
16 * all copies or substantial portions of the Software.
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
28 #include "sysemu/sysemu.h"
29 #include "sysemu/char.h"
31 #include "sysemu/device_tree.h"
33 #include "hw/ppc/spapr.h"
34 #include "hw/ppc/spapr_vio.h"
35 #include "qapi-event.h"
39 #define TOKEN_BASE 0x2000
40 #define TOKEN_MAX 0x100
42 static void rtas_display_character(PowerPCCPU *cpu, sPAPREnvironment *spapr,
43 uint32_t token, uint32_t nargs,
45 uint32_t nret, target_ulong rets)
47 uint8_t c = rtas_ld(args, 0);
48 VIOsPAPRDevice *sdev = vty_lookup(spapr, 0);
51 rtas_st(rets, 0, RTAS_OUT_HW_ERROR);
53 vty_putchars(sdev, &c, sizeof(c));
54 rtas_st(rets, 0, RTAS_OUT_SUCCESS);
58 static void rtas_get_time_of_day(PowerPCCPU *cpu, sPAPREnvironment *spapr,
59 uint32_t token, uint32_t nargs,
61 uint32_t nret, target_ulong rets)
66 rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
70 qemu_get_timedate(&tm, spapr->rtc_offset);
72 rtas_st(rets, 0, RTAS_OUT_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 */
82 static void rtas_set_time_of_day(PowerPCCPU *cpu, sPAPREnvironment *spapr,
83 uint32_t token, uint32_t nargs,
85 uint32_t nret, target_ulong rets)
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);
96 /* Just generate a monitor event for the change */
97 qapi_event_send_rtc_change(qemu_timedate_diff(&tm), &error_abort);
98 spapr->rtc_offset = qemu_timedate_diff(&tm);
100 rtas_st(rets, 0, RTAS_OUT_SUCCESS);
103 static void rtas_power_off(PowerPCCPU *cpu, sPAPREnvironment *spapr,
104 uint32_t token, uint32_t nargs, target_ulong args,
105 uint32_t nret, target_ulong rets)
107 if (nargs != 2 || nret != 1) {
108 rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
111 qemu_system_shutdown_request();
112 rtas_st(rets, 0, RTAS_OUT_SUCCESS);
115 static void rtas_system_reboot(PowerPCCPU *cpu, sPAPREnvironment *spapr,
116 uint32_t token, uint32_t nargs,
118 uint32_t nret, target_ulong rets)
120 if (nargs != 0 || nret != 1) {
121 rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
124 qemu_system_reset_request();
125 rtas_st(rets, 0, RTAS_OUT_SUCCESS);
128 static void rtas_query_cpu_stopped_state(PowerPCCPU *cpu_,
129 sPAPREnvironment *spapr,
130 uint32_t token, uint32_t nargs,
132 uint32_t nret, target_ulong rets)
137 if (nargs != 1 || nret != 2) {
138 rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
142 id = rtas_ld(args, 0);
143 cpu = ppc_get_vcpu_by_dt_id(id);
145 if (CPU(cpu)->halted) {
151 rtas_st(rets, 0, RTAS_OUT_SUCCESS);
155 /* Didn't find a matching cpu */
156 rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
159 static void rtas_start_cpu(PowerPCCPU *cpu_, sPAPREnvironment *spapr,
160 uint32_t token, uint32_t nargs,
162 uint32_t nret, target_ulong rets)
164 target_ulong id, start, r3;
167 if (nargs != 3 || nret != 1) {
168 rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
172 id = rtas_ld(args, 0);
173 start = rtas_ld(args, 1);
174 r3 = rtas_ld(args, 2);
176 cpu = ppc_get_vcpu_by_dt_id(id);
178 CPUState *cs = CPU(cpu);
179 CPUPPCState *env = &cpu->env;
182 rtas_st(rets, 0, RTAS_OUT_HW_ERROR);
186 /* This will make sure qemu state is up to date with kvm, and
187 * mark it dirty so our changes get flushed back before the
189 kvm_cpu_synchronize_state(cs);
191 env->msr = (1ULL << MSR_SF) | (1ULL << MSR_ME);
198 rtas_st(rets, 0, RTAS_OUT_SUCCESS);
202 /* Didn't find a matching cpu */
203 rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
206 static void rtas_stop_self(PowerPCCPU *cpu, sPAPREnvironment *spapr,
207 uint32_t token, uint32_t nargs,
209 uint32_t nret, target_ulong rets)
211 CPUState *cs = CPU(cpu);
212 CPUPPCState *env = &cpu->env;
217 * While stopping a CPU, the guest calls H_CPPR which
218 * effectively disables interrupts on XICS level.
219 * However decrementer interrupts in TCG can still
220 * wake the CPU up so here we disable interrupts in MSR
222 * As rtas_start_cpu() resets the whole MSR anyway, there is
223 * no need to bother with specific bits, we just clear it.
228 #define DIAGNOSTICS_RUN_MODE 42
230 static void rtas_ibm_get_system_parameter(PowerPCCPU *cpu,
231 sPAPREnvironment *spapr,
232 uint32_t token, uint32_t nargs,
234 uint32_t nret, target_ulong rets)
236 target_ulong parameter = rtas_ld(args, 0);
237 target_ulong buffer = rtas_ld(args, 1);
238 target_ulong length = rtas_ld(args, 2);
239 target_ulong ret = RTAS_OUT_NOT_SUPPORTED;
242 case DIAGNOSTICS_RUN_MODE:
244 rtas_st(buffer, 0, 0);
245 ret = RTAS_OUT_SUCCESS;
250 rtas_st(rets, 0, ret);
253 static void rtas_ibm_set_system_parameter(PowerPCCPU *cpu,
254 sPAPREnvironment *spapr,
255 uint32_t token, uint32_t nargs,
257 uint32_t nret, target_ulong rets)
259 target_ulong parameter = rtas_ld(args, 0);
260 target_ulong ret = RTAS_OUT_NOT_SUPPORTED;
263 case DIAGNOSTICS_RUN_MODE:
264 ret = RTAS_OUT_NOT_AUTHORIZED;
268 rtas_st(rets, 0, ret);
271 static struct rtas_call {
274 } rtas_table[TOKEN_MAX];
276 static struct rtas_call *rtas_next = rtas_table;
278 target_ulong spapr_rtas_call(PowerPCCPU *cpu, sPAPREnvironment *spapr,
279 uint32_t token, uint32_t nargs, target_ulong args,
280 uint32_t nret, target_ulong rets)
282 if ((token >= TOKEN_BASE)
283 && ((token - TOKEN_BASE) < TOKEN_MAX)) {
284 struct rtas_call *call = rtas_table + (token - TOKEN_BASE);
287 call->fn(cpu, spapr, token, nargs, args, nret, rets);
292 /* HACK: Some Linux early debug code uses RTAS display-character,
293 * but assumes the token value is 0xa (which it is on some real
294 * machines) without looking it up in the device tree. This
295 * special case makes this work */
297 rtas_display_character(cpu, spapr, 0xa, nargs, args, nret, rets);
301 hcall_dprintf("Unknown RTAS token 0x%x\n", token);
302 rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
306 int spapr_rtas_register(const char *name, spapr_rtas_fn fn)
310 for (i = 0; i < (rtas_next - rtas_table); i++) {
311 if (strcmp(name, rtas_table[i].name) == 0) {
312 fprintf(stderr, "RTAS call \"%s\" registered twice\n", name);
317 assert(rtas_next < (rtas_table + TOKEN_MAX));
319 rtas_next->name = name;
322 return (rtas_next++ - rtas_table) + TOKEN_BASE;
325 int spapr_rtas_device_tree_setup(void *fdt, hwaddr rtas_addr,
331 ret = fdt_add_mem_rsv(fdt, rtas_addr, rtas_size);
333 fprintf(stderr, "Couldn't add RTAS reserve entry: %s\n",
338 ret = qemu_fdt_setprop_cell(fdt, "/rtas", "linux,rtas-base",
341 fprintf(stderr, "Couldn't add linux,rtas-base property: %s\n",
346 ret = qemu_fdt_setprop_cell(fdt, "/rtas", "linux,rtas-entry",
349 fprintf(stderr, "Couldn't add linux,rtas-entry property: %s\n",
354 ret = qemu_fdt_setprop_cell(fdt, "/rtas", "rtas-size",
357 fprintf(stderr, "Couldn't add rtas-size property: %s\n",
362 for (i = 0; i < TOKEN_MAX; i++) {
363 struct rtas_call *call = &rtas_table[i];
369 ret = qemu_fdt_setprop_cell(fdt, "/rtas", call->name,
372 fprintf(stderr, "Couldn't add rtas token for %s: %s\n",
373 call->name, fdt_strerror(ret));
381 static void core_rtas_register_types(void)
383 spapr_rtas_register("display-character", rtas_display_character);
384 spapr_rtas_register("get-time-of-day", rtas_get_time_of_day);
385 spapr_rtas_register("set-time-of-day", rtas_set_time_of_day);
386 spapr_rtas_register("power-off", rtas_power_off);
387 spapr_rtas_register("system-reboot", rtas_system_reboot);
388 spapr_rtas_register("query-cpu-stopped-state",
389 rtas_query_cpu_stopped_state);
390 spapr_rtas_register("start-cpu", rtas_start_cpu);
391 spapr_rtas_register("stop-self", rtas_stop_self);
392 spapr_rtas_register("ibm,get-system-parameter",
393 rtas_ibm_get_system_parameter);
394 spapr_rtas_register("ibm,set-system-parameter",
395 rtas_ibm_set_system_parameter);
398 type_init(core_rtas_register_types)