root / hw / spapr_rtas.c @ e8b36ba9
History | View | Annotate | Download (7.9 kB)
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 |
|
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);
|
47 |
VIOsPAPRDevice *sdev = spapr_vio_find_by_reg(spapr->vio_bus, 0);
|
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 |
|
69 |
qemu_get_timedate(&tm, 0);
|
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 |
|
81 |
static void rtas_power_off(sPAPREnvironment *spapr, |
82 |
uint32_t token, uint32_t nargs, target_ulong args, |
83 |
uint32_t nret, target_ulong rets) |
84 |
{ |
85 |
if (nargs != 2 || nret != 1) { |
86 |
rtas_st(rets, 0, -3); |
87 |
return;
|
88 |
} |
89 |
qemu_system_shutdown_request(); |
90 |
rtas_st(rets, 0, 0); |
91 |
} |
92 |
|
93 |
static void rtas_query_cpu_stopped_state(sPAPREnvironment *spapr, |
94 |
uint32_t token, uint32_t nargs, |
95 |
target_ulong args, |
96 |
uint32_t nret, target_ulong rets) |
97 |
{ |
98 |
target_ulong id; |
99 |
CPUState *env; |
100 |
|
101 |
if (nargs != 1 || nret != 2) { |
102 |
rtas_st(rets, 0, -3); |
103 |
return;
|
104 |
} |
105 |
|
106 |
id = rtas_ld(args, 0);
|
107 |
for (env = first_cpu; env; env = env->next_cpu) {
|
108 |
if (env->cpu_index != id) {
|
109 |
continue;
|
110 |
} |
111 |
|
112 |
if (env->halted) {
|
113 |
rtas_st(rets, 1, 0); |
114 |
} else {
|
115 |
rtas_st(rets, 1, 2); |
116 |
} |
117 |
|
118 |
rtas_st(rets, 0, 0); |
119 |
return;
|
120 |
} |
121 |
|
122 |
/* Didn't find a matching cpu */
|
123 |
rtas_st(rets, 0, -3); |
124 |
} |
125 |
|
126 |
static void rtas_start_cpu(sPAPREnvironment *spapr, |
127 |
uint32_t token, uint32_t nargs, |
128 |
target_ulong args, |
129 |
uint32_t nret, target_ulong rets) |
130 |
{ |
131 |
target_ulong id, start, r3; |
132 |
CPUState *env; |
133 |
|
134 |
if (nargs != 3 || nret != 1) { |
135 |
rtas_st(rets, 0, -3); |
136 |
return;
|
137 |
} |
138 |
|
139 |
id = rtas_ld(args, 0);
|
140 |
start = rtas_ld(args, 1);
|
141 |
r3 = rtas_ld(args, 2);
|
142 |
|
143 |
for (env = first_cpu; env; env = env->next_cpu) {
|
144 |
if (env->cpu_index != id) {
|
145 |
continue;
|
146 |
} |
147 |
|
148 |
if (!env->halted) {
|
149 |
rtas_st(rets, 0, -1); |
150 |
return;
|
151 |
} |
152 |
|
153 |
env->msr = (1ULL << MSR_SF) | (1ULL << MSR_ME); |
154 |
env->nip = start; |
155 |
env->gpr[3] = r3;
|
156 |
env->halted = 0;
|
157 |
|
158 |
qemu_cpu_kick(env); |
159 |
|
160 |
rtas_st(rets, 0, 0); |
161 |
return;
|
162 |
} |
163 |
|
164 |
/* Didn't find a matching cpu */
|
165 |
rtas_st(rets, 0, -3); |
166 |
} |
167 |
|
168 |
static struct rtas_call { |
169 |
const char *name; |
170 |
spapr_rtas_fn fn; |
171 |
} rtas_table[TOKEN_MAX]; |
172 |
|
173 |
struct rtas_call *rtas_next = rtas_table;
|
174 |
|
175 |
target_ulong spapr_rtas_call(sPAPREnvironment *spapr, |
176 |
uint32_t token, uint32_t nargs, target_ulong args, |
177 |
uint32_t nret, target_ulong rets) |
178 |
{ |
179 |
if ((token >= TOKEN_BASE)
|
180 |
&& ((token - TOKEN_BASE) < TOKEN_MAX)) { |
181 |
struct rtas_call *call = rtas_table + (token - TOKEN_BASE);
|
182 |
|
183 |
if (call->fn) {
|
184 |
call->fn(spapr, token, nargs, args, nret, rets); |
185 |
return H_SUCCESS;
|
186 |
} |
187 |
} |
188 |
|
189 |
/* HACK: Some Linux early debug code uses RTAS display-character,
|
190 |
* but assumes the token value is 0xa (which it is on some real
|
191 |
* machines) without looking it up in the device tree. This
|
192 |
* special case makes this work */
|
193 |
if (token == 0xa) { |
194 |
rtas_display_character(spapr, 0xa, nargs, args, nret, rets);
|
195 |
return H_SUCCESS;
|
196 |
} |
197 |
|
198 |
hcall_dprintf("Unknown RTAS token 0x%x\n", token);
|
199 |
rtas_st(rets, 0, -3); |
200 |
return H_PARAMETER;
|
201 |
} |
202 |
|
203 |
void spapr_rtas_register(const char *name, spapr_rtas_fn fn) |
204 |
{ |
205 |
assert(rtas_next < (rtas_table + TOKEN_MAX)); |
206 |
|
207 |
rtas_next->name = name; |
208 |
rtas_next->fn = fn; |
209 |
|
210 |
rtas_next++; |
211 |
} |
212 |
|
213 |
int spapr_rtas_device_tree_setup(void *fdt, target_phys_addr_t rtas_addr, |
214 |
target_phys_addr_t rtas_size) |
215 |
{ |
216 |
int ret;
|
217 |
int i;
|
218 |
|
219 |
ret = fdt_add_mem_rsv(fdt, rtas_addr, rtas_size); |
220 |
if (ret < 0) { |
221 |
fprintf(stderr, "Couldn't add RTAS reserve entry: %s\n",
|
222 |
fdt_strerror(ret)); |
223 |
return ret;
|
224 |
} |
225 |
|
226 |
ret = qemu_devtree_setprop_cell(fdt, "/rtas", "linux,rtas-base", |
227 |
rtas_addr); |
228 |
if (ret < 0) { |
229 |
fprintf(stderr, "Couldn't add linux,rtas-base property: %s\n",
|
230 |
fdt_strerror(ret)); |
231 |
return ret;
|
232 |
} |
233 |
|
234 |
ret = qemu_devtree_setprop_cell(fdt, "/rtas", "linux,rtas-entry", |
235 |
rtas_addr); |
236 |
if (ret < 0) { |
237 |
fprintf(stderr, "Couldn't add linux,rtas-entry property: %s\n",
|
238 |
fdt_strerror(ret)); |
239 |
return ret;
|
240 |
} |
241 |
|
242 |
ret = qemu_devtree_setprop_cell(fdt, "/rtas", "rtas-size", |
243 |
rtas_size); |
244 |
if (ret < 0) { |
245 |
fprintf(stderr, "Couldn't add rtas-size property: %s\n",
|
246 |
fdt_strerror(ret)); |
247 |
return ret;
|
248 |
} |
249 |
|
250 |
for (i = 0; i < TOKEN_MAX; i++) { |
251 |
struct rtas_call *call = &rtas_table[i];
|
252 |
|
253 |
if (!call->fn) {
|
254 |
continue;
|
255 |
} |
256 |
|
257 |
ret = qemu_devtree_setprop_cell(fdt, "/rtas", call->name,
|
258 |
i + TOKEN_BASE); |
259 |
if (ret < 0) { |
260 |
fprintf(stderr, "Couldn't add rtas token for %s: %s\n",
|
261 |
call->name, fdt_strerror(ret)); |
262 |
return ret;
|
263 |
} |
264 |
|
265 |
} |
266 |
return 0; |
267 |
} |
268 |
|
269 |
static void register_core_rtas(void) |
270 |
{ |
271 |
spapr_rtas_register("display-character", rtas_display_character);
|
272 |
spapr_rtas_register("get-time-of-day", rtas_get_time_of_day);
|
273 |
spapr_rtas_register("power-off", rtas_power_off);
|
274 |
spapr_rtas_register("query-cpu-stopped-state",
|
275 |
rtas_query_cpu_stopped_state); |
276 |
spapr_rtas_register("start-cpu", rtas_start_cpu);
|
277 |
} |
278 |
device_init(register_core_rtas); |