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300459d5 HC |
1 | /* |
2 | * Copyright (C) 2010, 2011, 2012, Lemote, Inc. | |
3 | * Author: Chen Huacai, chenhc@lemote.com | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or | |
6 | * modify it under the terms of the GNU General Public License | |
7 | * as published by the Free Software Foundation; either version 2 | |
8 | * of the License, or (at your option) any later version. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, | |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | * GNU General Public License for more details. | |
14 | * | |
15 | */ | |
16 | ||
17 | #include <linux/init.h> | |
18 | #include <linux/cpu.h> | |
19 | #include <linux/sched.h> | |
20 | #include <linux/smp.h> | |
21 | #include <linux/cpufreq.h> | |
22 | #include <asm/processor.h> | |
23 | #include <asm/time.h> | |
24 | #include <asm/clock.h> | |
25 | #include <asm/tlbflush.h> | |
c4a987db | 26 | #include <asm/cacheflush.h> |
300459d5 | 27 | #include <loongson.h> |
3adeb256 | 28 | #include <workarounds.h> |
300459d5 HC |
29 | |
30 | #include "smp.h" | |
31 | ||
c4a987db HC |
32 | DEFINE_PER_CPU(int, cpu_state); |
33 | DEFINE_PER_CPU(uint32_t, core0_c0count); | |
34 | ||
e7841be5 HC |
35 | static void *ipi_set0_regs[16]; |
36 | static void *ipi_clear0_regs[16]; | |
37 | static void *ipi_status0_regs[16]; | |
38 | static void *ipi_en0_regs[16]; | |
39 | static void *ipi_mailbox_buf[16]; | |
40 | ||
300459d5 HC |
41 | /* read a 32bit value from ipi register */ |
42 | #define loongson3_ipi_read32(addr) readl(addr) | |
43 | /* read a 64bit value from ipi register */ | |
44 | #define loongson3_ipi_read64(addr) readq(addr) | |
45 | /* write a 32bit value to ipi register */ | |
46 | #define loongson3_ipi_write32(action, addr) \ | |
47 | do { \ | |
48 | writel(action, addr); \ | |
49 | __wbflush(); \ | |
50 | } while (0) | |
51 | /* write a 64bit value to ipi register */ | |
52 | #define loongson3_ipi_write64(action, addr) \ | |
53 | do { \ | |
54 | writeq(action, addr); \ | |
55 | __wbflush(); \ | |
56 | } while (0) | |
57 | ||
e7841be5 HC |
58 | static void ipi_set0_regs_init(void) |
59 | { | |
60 | ipi_set0_regs[0] = (void *) | |
61 | (SMP_CORE_GROUP0_BASE + SMP_CORE0_OFFSET + SET0); | |
62 | ipi_set0_regs[1] = (void *) | |
63 | (SMP_CORE_GROUP0_BASE + SMP_CORE1_OFFSET + SET0); | |
64 | ipi_set0_regs[2] = (void *) | |
65 | (SMP_CORE_GROUP0_BASE + SMP_CORE2_OFFSET + SET0); | |
66 | ipi_set0_regs[3] = (void *) | |
67 | (SMP_CORE_GROUP0_BASE + SMP_CORE3_OFFSET + SET0); | |
68 | ipi_set0_regs[4] = (void *) | |
69 | (SMP_CORE_GROUP1_BASE + SMP_CORE0_OFFSET + SET0); | |
70 | ipi_set0_regs[5] = (void *) | |
71 | (SMP_CORE_GROUP1_BASE + SMP_CORE1_OFFSET + SET0); | |
72 | ipi_set0_regs[6] = (void *) | |
73 | (SMP_CORE_GROUP1_BASE + SMP_CORE2_OFFSET + SET0); | |
74 | ipi_set0_regs[7] = (void *) | |
75 | (SMP_CORE_GROUP1_BASE + SMP_CORE3_OFFSET + SET0); | |
76 | ipi_set0_regs[8] = (void *) | |
77 | (SMP_CORE_GROUP2_BASE + SMP_CORE0_OFFSET + SET0); | |
78 | ipi_set0_regs[9] = (void *) | |
79 | (SMP_CORE_GROUP2_BASE + SMP_CORE1_OFFSET + SET0); | |
80 | ipi_set0_regs[10] = (void *) | |
81 | (SMP_CORE_GROUP2_BASE + SMP_CORE2_OFFSET + SET0); | |
82 | ipi_set0_regs[11] = (void *) | |
83 | (SMP_CORE_GROUP2_BASE + SMP_CORE3_OFFSET + SET0); | |
84 | ipi_set0_regs[12] = (void *) | |
85 | (SMP_CORE_GROUP3_BASE + SMP_CORE0_OFFSET + SET0); | |
86 | ipi_set0_regs[13] = (void *) | |
87 | (SMP_CORE_GROUP3_BASE + SMP_CORE1_OFFSET + SET0); | |
88 | ipi_set0_regs[14] = (void *) | |
89 | (SMP_CORE_GROUP3_BASE + SMP_CORE2_OFFSET + SET0); | |
90 | ipi_set0_regs[15] = (void *) | |
91 | (SMP_CORE_GROUP3_BASE + SMP_CORE3_OFFSET + SET0); | |
92 | } | |
300459d5 | 93 | |
e7841be5 HC |
94 | static void ipi_clear0_regs_init(void) |
95 | { | |
96 | ipi_clear0_regs[0] = (void *) | |
97 | (SMP_CORE_GROUP0_BASE + SMP_CORE0_OFFSET + CLEAR0); | |
98 | ipi_clear0_regs[1] = (void *) | |
99 | (SMP_CORE_GROUP0_BASE + SMP_CORE1_OFFSET + CLEAR0); | |
100 | ipi_clear0_regs[2] = (void *) | |
101 | (SMP_CORE_GROUP0_BASE + SMP_CORE2_OFFSET + CLEAR0); | |
102 | ipi_clear0_regs[3] = (void *) | |
103 | (SMP_CORE_GROUP0_BASE + SMP_CORE3_OFFSET + CLEAR0); | |
104 | ipi_clear0_regs[4] = (void *) | |
105 | (SMP_CORE_GROUP1_BASE + SMP_CORE0_OFFSET + CLEAR0); | |
106 | ipi_clear0_regs[5] = (void *) | |
107 | (SMP_CORE_GROUP1_BASE + SMP_CORE1_OFFSET + CLEAR0); | |
108 | ipi_clear0_regs[6] = (void *) | |
109 | (SMP_CORE_GROUP1_BASE + SMP_CORE2_OFFSET + CLEAR0); | |
110 | ipi_clear0_regs[7] = (void *) | |
111 | (SMP_CORE_GROUP1_BASE + SMP_CORE3_OFFSET + CLEAR0); | |
112 | ipi_clear0_regs[8] = (void *) | |
113 | (SMP_CORE_GROUP2_BASE + SMP_CORE0_OFFSET + CLEAR0); | |
114 | ipi_clear0_regs[9] = (void *) | |
115 | (SMP_CORE_GROUP2_BASE + SMP_CORE1_OFFSET + CLEAR0); | |
116 | ipi_clear0_regs[10] = (void *) | |
117 | (SMP_CORE_GROUP2_BASE + SMP_CORE2_OFFSET + CLEAR0); | |
118 | ipi_clear0_regs[11] = (void *) | |
119 | (SMP_CORE_GROUP2_BASE + SMP_CORE3_OFFSET + CLEAR0); | |
120 | ipi_clear0_regs[12] = (void *) | |
121 | (SMP_CORE_GROUP3_BASE + SMP_CORE0_OFFSET + CLEAR0); | |
122 | ipi_clear0_regs[13] = (void *) | |
123 | (SMP_CORE_GROUP3_BASE + SMP_CORE1_OFFSET + CLEAR0); | |
124 | ipi_clear0_regs[14] = (void *) | |
125 | (SMP_CORE_GROUP3_BASE + SMP_CORE2_OFFSET + CLEAR0); | |
126 | ipi_clear0_regs[15] = (void *) | |
127 | (SMP_CORE_GROUP3_BASE + SMP_CORE3_OFFSET + CLEAR0); | |
128 | } | |
300459d5 | 129 | |
e7841be5 HC |
130 | static void ipi_status0_regs_init(void) |
131 | { | |
132 | ipi_status0_regs[0] = (void *) | |
133 | (SMP_CORE_GROUP0_BASE + SMP_CORE0_OFFSET + STATUS0); | |
134 | ipi_status0_regs[1] = (void *) | |
135 | (SMP_CORE_GROUP0_BASE + SMP_CORE1_OFFSET + STATUS0); | |
136 | ipi_status0_regs[2] = (void *) | |
137 | (SMP_CORE_GROUP0_BASE + SMP_CORE2_OFFSET + STATUS0); | |
138 | ipi_status0_regs[3] = (void *) | |
139 | (SMP_CORE_GROUP0_BASE + SMP_CORE3_OFFSET + STATUS0); | |
140 | ipi_status0_regs[4] = (void *) | |
141 | (SMP_CORE_GROUP1_BASE + SMP_CORE0_OFFSET + STATUS0); | |
142 | ipi_status0_regs[5] = (void *) | |
143 | (SMP_CORE_GROUP1_BASE + SMP_CORE1_OFFSET + STATUS0); | |
144 | ipi_status0_regs[6] = (void *) | |
145 | (SMP_CORE_GROUP1_BASE + SMP_CORE2_OFFSET + STATUS0); | |
146 | ipi_status0_regs[7] = (void *) | |
147 | (SMP_CORE_GROUP1_BASE + SMP_CORE3_OFFSET + STATUS0); | |
148 | ipi_status0_regs[8] = (void *) | |
149 | (SMP_CORE_GROUP2_BASE + SMP_CORE0_OFFSET + STATUS0); | |
150 | ipi_status0_regs[9] = (void *) | |
151 | (SMP_CORE_GROUP2_BASE + SMP_CORE1_OFFSET + STATUS0); | |
152 | ipi_status0_regs[10] = (void *) | |
153 | (SMP_CORE_GROUP2_BASE + SMP_CORE2_OFFSET + STATUS0); | |
154 | ipi_status0_regs[11] = (void *) | |
155 | (SMP_CORE_GROUP2_BASE + SMP_CORE3_OFFSET + STATUS0); | |
156 | ipi_status0_regs[12] = (void *) | |
157 | (SMP_CORE_GROUP3_BASE + SMP_CORE0_OFFSET + STATUS0); | |
158 | ipi_status0_regs[13] = (void *) | |
159 | (SMP_CORE_GROUP3_BASE + SMP_CORE1_OFFSET + STATUS0); | |
160 | ipi_status0_regs[14] = (void *) | |
161 | (SMP_CORE_GROUP3_BASE + SMP_CORE2_OFFSET + STATUS0); | |
162 | ipi_status0_regs[15] = (void *) | |
163 | (SMP_CORE_GROUP3_BASE + SMP_CORE3_OFFSET + STATUS0); | |
164 | } | |
300459d5 | 165 | |
e7841be5 HC |
166 | static void ipi_en0_regs_init(void) |
167 | { | |
168 | ipi_en0_regs[0] = (void *) | |
169 | (SMP_CORE_GROUP0_BASE + SMP_CORE0_OFFSET + EN0); | |
170 | ipi_en0_regs[1] = (void *) | |
171 | (SMP_CORE_GROUP0_BASE + SMP_CORE1_OFFSET + EN0); | |
172 | ipi_en0_regs[2] = (void *) | |
173 | (SMP_CORE_GROUP0_BASE + SMP_CORE2_OFFSET + EN0); | |
174 | ipi_en0_regs[3] = (void *) | |
175 | (SMP_CORE_GROUP0_BASE + SMP_CORE3_OFFSET + EN0); | |
176 | ipi_en0_regs[4] = (void *) | |
177 | (SMP_CORE_GROUP1_BASE + SMP_CORE0_OFFSET + EN0); | |
178 | ipi_en0_regs[5] = (void *) | |
179 | (SMP_CORE_GROUP1_BASE + SMP_CORE1_OFFSET + EN0); | |
180 | ipi_en0_regs[6] = (void *) | |
181 | (SMP_CORE_GROUP1_BASE + SMP_CORE2_OFFSET + EN0); | |
182 | ipi_en0_regs[7] = (void *) | |
183 | (SMP_CORE_GROUP1_BASE + SMP_CORE3_OFFSET + EN0); | |
184 | ipi_en0_regs[8] = (void *) | |
185 | (SMP_CORE_GROUP2_BASE + SMP_CORE0_OFFSET + EN0); | |
186 | ipi_en0_regs[9] = (void *) | |
187 | (SMP_CORE_GROUP2_BASE + SMP_CORE1_OFFSET + EN0); | |
188 | ipi_en0_regs[10] = (void *) | |
189 | (SMP_CORE_GROUP2_BASE + SMP_CORE2_OFFSET + EN0); | |
190 | ipi_en0_regs[11] = (void *) | |
191 | (SMP_CORE_GROUP2_BASE + SMP_CORE3_OFFSET + EN0); | |
192 | ipi_en0_regs[12] = (void *) | |
193 | (SMP_CORE_GROUP3_BASE + SMP_CORE0_OFFSET + EN0); | |
194 | ipi_en0_regs[13] = (void *) | |
195 | (SMP_CORE_GROUP3_BASE + SMP_CORE1_OFFSET + EN0); | |
196 | ipi_en0_regs[14] = (void *) | |
197 | (SMP_CORE_GROUP3_BASE + SMP_CORE2_OFFSET + EN0); | |
198 | ipi_en0_regs[15] = (void *) | |
199 | (SMP_CORE_GROUP3_BASE + SMP_CORE3_OFFSET + EN0); | |
200 | } | |
300459d5 | 201 | |
e7841be5 HC |
202 | static void ipi_mailbox_buf_init(void) |
203 | { | |
204 | ipi_mailbox_buf[0] = (void *) | |
205 | (SMP_CORE_GROUP0_BASE + SMP_CORE0_OFFSET + BUF); | |
206 | ipi_mailbox_buf[1] = (void *) | |
207 | (SMP_CORE_GROUP0_BASE + SMP_CORE1_OFFSET + BUF); | |
208 | ipi_mailbox_buf[2] = (void *) | |
209 | (SMP_CORE_GROUP0_BASE + SMP_CORE2_OFFSET + BUF); | |
210 | ipi_mailbox_buf[3] = (void *) | |
211 | (SMP_CORE_GROUP0_BASE + SMP_CORE3_OFFSET + BUF); | |
212 | ipi_mailbox_buf[4] = (void *) | |
213 | (SMP_CORE_GROUP1_BASE + SMP_CORE0_OFFSET + BUF); | |
214 | ipi_mailbox_buf[5] = (void *) | |
215 | (SMP_CORE_GROUP1_BASE + SMP_CORE1_OFFSET + BUF); | |
216 | ipi_mailbox_buf[6] = (void *) | |
217 | (SMP_CORE_GROUP1_BASE + SMP_CORE2_OFFSET + BUF); | |
218 | ipi_mailbox_buf[7] = (void *) | |
219 | (SMP_CORE_GROUP1_BASE + SMP_CORE3_OFFSET + BUF); | |
220 | ipi_mailbox_buf[8] = (void *) | |
221 | (SMP_CORE_GROUP2_BASE + SMP_CORE0_OFFSET + BUF); | |
222 | ipi_mailbox_buf[9] = (void *) | |
223 | (SMP_CORE_GROUP2_BASE + SMP_CORE1_OFFSET + BUF); | |
224 | ipi_mailbox_buf[10] = (void *) | |
225 | (SMP_CORE_GROUP2_BASE + SMP_CORE2_OFFSET + BUF); | |
226 | ipi_mailbox_buf[11] = (void *) | |
227 | (SMP_CORE_GROUP2_BASE + SMP_CORE3_OFFSET + BUF); | |
228 | ipi_mailbox_buf[12] = (void *) | |
229 | (SMP_CORE_GROUP3_BASE + SMP_CORE0_OFFSET + BUF); | |
230 | ipi_mailbox_buf[13] = (void *) | |
231 | (SMP_CORE_GROUP3_BASE + SMP_CORE1_OFFSET + BUF); | |
232 | ipi_mailbox_buf[14] = (void *) | |
233 | (SMP_CORE_GROUP3_BASE + SMP_CORE2_OFFSET + BUF); | |
234 | ipi_mailbox_buf[15] = (void *) | |
235 | (SMP_CORE_GROUP3_BASE + SMP_CORE3_OFFSET + BUF); | |
236 | } | |
300459d5 HC |
237 | |
238 | /* | |
239 | * Simple enough, just poke the appropriate ipi register | |
240 | */ | |
241 | static void loongson3_send_ipi_single(int cpu, unsigned int action) | |
242 | { | |
ec0f8d3f | 243 | loongson3_ipi_write32((u32)action, ipi_set0_regs[cpu_logical_map(cpu)]); |
300459d5 HC |
244 | } |
245 | ||
246 | static void | |
247 | loongson3_send_ipi_mask(const struct cpumask *mask, unsigned int action) | |
248 | { | |
249 | unsigned int i; | |
250 | ||
251 | for_each_cpu(i, mask) | |
ec0f8d3f | 252 | loongson3_ipi_write32((u32)action, ipi_set0_regs[cpu_logical_map(i)]); |
300459d5 HC |
253 | } |
254 | ||
255 | void loongson3_ipi_interrupt(struct pt_regs *regs) | |
256 | { | |
c4a987db HC |
257 | int i, cpu = smp_processor_id(); |
258 | unsigned int action, c0count; | |
300459d5 HC |
259 | |
260 | /* Load the ipi register to figure out what we're supposed to do */ | |
ec0f8d3f | 261 | action = loongson3_ipi_read32(ipi_status0_regs[cpu_logical_map(cpu)]); |
300459d5 HC |
262 | |
263 | /* Clear the ipi register to clear the interrupt */ | |
ec0f8d3f | 264 | loongson3_ipi_write32((u32)action, ipi_clear0_regs[cpu_logical_map(cpu)]); |
300459d5 HC |
265 | |
266 | if (action & SMP_RESCHEDULE_YOURSELF) | |
267 | scheduler_ipi(); | |
268 | ||
269 | if (action & SMP_CALL_FUNCTION) | |
270 | smp_call_function_interrupt(); | |
c4a987db HC |
271 | |
272 | if (action & SMP_ASK_C0COUNT) { | |
273 | BUG_ON(cpu != 0); | |
274 | c0count = read_c0_count(); | |
e1fb96e0 | 275 | for (i = 1; i < num_possible_cpus(); i++) |
c4a987db HC |
276 | per_cpu(core0_c0count, i) = c0count; |
277 | } | |
300459d5 HC |
278 | } |
279 | ||
c4a987db | 280 | #define MAX_LOOPS 1111 |
300459d5 HC |
281 | /* |
282 | * SMP init and finish on secondary CPUs | |
283 | */ | |
284 | static void loongson3_init_secondary(void) | |
285 | { | |
286 | int i; | |
c4a987db HC |
287 | uint32_t initcount; |
288 | unsigned int cpu = smp_processor_id(); | |
300459d5 HC |
289 | unsigned int imask = STATUSF_IP7 | STATUSF_IP6 | |
290 | STATUSF_IP3 | STATUSF_IP2; | |
291 | ||
292 | /* Set interrupt mask, but don't enable */ | |
293 | change_c0_status(ST0_IM, imask); | |
294 | ||
ec0f8d3f HC |
295 | for (i = 0; i < num_possible_cpus(); i++) |
296 | loongson3_ipi_write32(0xffffffff, ipi_en0_regs[cpu_logical_map(i)]); | |
c4a987db HC |
297 | |
298 | per_cpu(cpu_state, cpu) = CPU_ONLINE; | |
ec0f8d3f HC |
299 | cpu_data[cpu].core = |
300 | cpu_logical_map(cpu) % loongson_sysconf.cores_per_package; | |
301 | cpu_data[cpu].package = | |
302 | cpu_logical_map(cpu) / loongson_sysconf.cores_per_package; | |
c4a987db HC |
303 | |
304 | i = 0; | |
35898716 | 305 | __this_cpu_write(core0_c0count, 0); |
c4a987db | 306 | loongson3_send_ipi_single(0, SMP_ASK_C0COUNT); |
35898716 | 307 | while (!__this_cpu_read(core0_c0count)) { |
c4a987db HC |
308 | i++; |
309 | cpu_relax(); | |
310 | } | |
311 | ||
312 | if (i > MAX_LOOPS) | |
313 | i = MAX_LOOPS; | |
35898716 | 314 | initcount = __this_cpu_read(core0_c0count) + i; |
c4a987db | 315 | write_c0_count(initcount); |
300459d5 HC |
316 | } |
317 | ||
318 | static void loongson3_smp_finish(void) | |
319 | { | |
ec0f8d3f HC |
320 | int cpu = smp_processor_id(); |
321 | ||
300459d5 HC |
322 | write_c0_compare(read_c0_count() + mips_hpt_frequency/HZ); |
323 | local_irq_enable(); | |
324 | loongson3_ipi_write64(0, | |
ec0f8d3f | 325 | (void *)(ipi_mailbox_buf[cpu_logical_map(cpu)]+0x0)); |
300459d5 HC |
326 | pr_info("CPU#%d finished, CP0_ST=%x\n", |
327 | smp_processor_id(), read_c0_status()); | |
328 | } | |
329 | ||
330 | static void __init loongson3_smp_setup(void) | |
331 | { | |
ec0f8d3f | 332 | int i = 0, num = 0; /* i: physical id, num: logical id */ |
300459d5 HC |
333 | |
334 | init_cpu_possible(cpu_none_mask); | |
300459d5 HC |
335 | |
336 | /* For unified kernel, NR_CPUS is the maximum possible value, | |
337 | * loongson_sysconf.nr_cpus is the really present value */ | |
ec0f8d3f HC |
338 | while (i < loongson_sysconf.nr_cpus) { |
339 | if (loongson_sysconf.reserved_cpus_mask & (1<<i)) { | |
340 | /* Reserved physical CPU cores */ | |
341 | __cpu_number_map[i] = -1; | |
342 | } else { | |
343 | __cpu_number_map[i] = num; | |
344 | __cpu_logical_map[num] = i; | |
345 | set_cpu_possible(num, true); | |
346 | num++; | |
347 | } | |
348 | i++; | |
300459d5 | 349 | } |
ec0f8d3f HC |
350 | pr_info("Detected %i available CPU(s)\n", num); |
351 | ||
352 | while (num < loongson_sysconf.nr_cpus) { | |
353 | __cpu_logical_map[num] = -1; | |
354 | num++; | |
355 | } | |
356 | ||
e7841be5 HC |
357 | ipi_set0_regs_init(); |
358 | ipi_clear0_regs_init(); | |
359 | ipi_status0_regs_init(); | |
360 | ipi_en0_regs_init(); | |
361 | ipi_mailbox_buf_init(); | |
ec0f8d3f HC |
362 | cpu_data[0].core = cpu_logical_map(0) % loongson_sysconf.cores_per_package; |
363 | cpu_data[0].package = cpu_logical_map(0) / loongson_sysconf.cores_per_package; | |
300459d5 HC |
364 | } |
365 | ||
366 | static void __init loongson3_prepare_cpus(unsigned int max_cpus) | |
367 | { | |
c4a987db HC |
368 | init_cpu_present(cpu_possible_mask); |
369 | per_cpu(cpu_state, smp_processor_id()) = CPU_ONLINE; | |
300459d5 HC |
370 | } |
371 | ||
372 | /* | |
373 | * Setup the PC, SP, and GP of a secondary processor and start it runing! | |
374 | */ | |
375 | static void loongson3_boot_secondary(int cpu, struct task_struct *idle) | |
376 | { | |
377 | unsigned long startargs[4]; | |
378 | ||
379 | pr_info("Booting CPU#%d...\n", cpu); | |
380 | ||
381 | /* startargs[] are initial PC, SP and GP for secondary CPU */ | |
382 | startargs[0] = (unsigned long)&smp_bootstrap; | |
383 | startargs[1] = (unsigned long)__KSTK_TOS(idle); | |
384 | startargs[2] = (unsigned long)task_thread_info(idle); | |
385 | startargs[3] = 0; | |
386 | ||
387 | pr_debug("CPU#%d, func_pc=%lx, sp=%lx, gp=%lx\n", | |
388 | cpu, startargs[0], startargs[1], startargs[2]); | |
389 | ||
ec0f8d3f HC |
390 | loongson3_ipi_write64(startargs[3], |
391 | (void *)(ipi_mailbox_buf[cpu_logical_map(cpu)]+0x18)); | |
392 | loongson3_ipi_write64(startargs[2], | |
393 | (void *)(ipi_mailbox_buf[cpu_logical_map(cpu)]+0x10)); | |
394 | loongson3_ipi_write64(startargs[1], | |
395 | (void *)(ipi_mailbox_buf[cpu_logical_map(cpu)]+0x8)); | |
396 | loongson3_ipi_write64(startargs[0], | |
397 | (void *)(ipi_mailbox_buf[cpu_logical_map(cpu)]+0x0)); | |
300459d5 HC |
398 | } |
399 | ||
c4a987db HC |
400 | #ifdef CONFIG_HOTPLUG_CPU |
401 | ||
402 | static int loongson3_cpu_disable(void) | |
403 | { | |
404 | unsigned long flags; | |
405 | unsigned int cpu = smp_processor_id(); | |
406 | ||
407 | if (cpu == 0) | |
408 | return -EBUSY; | |
409 | ||
410 | set_cpu_online(cpu, false); | |
8dd92891 | 411 | cpumask_clear_cpu(cpu, &cpu_callin_map); |
c4a987db HC |
412 | local_irq_save(flags); |
413 | fixup_irqs(); | |
414 | local_irq_restore(flags); | |
415 | flush_cache_all(); | |
416 | local_flush_tlb_all(); | |
417 | ||
418 | return 0; | |
419 | } | |
420 | ||
421 | ||
422 | static void loongson3_cpu_die(unsigned int cpu) | |
423 | { | |
424 | while (per_cpu(cpu_state, cpu) != CPU_DEAD) | |
425 | cpu_relax(); | |
426 | ||
427 | mb(); | |
428 | } | |
429 | ||
430 | /* To shutdown a core in Loongson 3, the target core should go to CKSEG1 and | |
431 | * flush all L1 entries at first. Then, another core (usually Core 0) can | |
432 | * safely disable the clock of the target core. loongson3_play_dead() is | |
433 | * called via CKSEG1 (uncached and unmmaped) */ | |
e7841be5 | 434 | static void loongson3a_play_dead(int *state_addr) |
c4a987db HC |
435 | { |
436 | register int val; | |
437 | register long cpuid, core, node, count; | |
438 | register void *addr, *base, *initfunc; | |
439 | ||
440 | __asm__ __volatile__( | |
441 | " .set push \n" | |
442 | " .set noreorder \n" | |
443 | " li %[addr], 0x80000000 \n" /* KSEG0 */ | |
444 | "1: cache 0, 0(%[addr]) \n" /* flush L1 ICache */ | |
445 | " cache 0, 1(%[addr]) \n" | |
446 | " cache 0, 2(%[addr]) \n" | |
447 | " cache 0, 3(%[addr]) \n" | |
448 | " cache 1, 0(%[addr]) \n" /* flush L1 DCache */ | |
449 | " cache 1, 1(%[addr]) \n" | |
450 | " cache 1, 2(%[addr]) \n" | |
451 | " cache 1, 3(%[addr]) \n" | |
452 | " addiu %[sets], %[sets], -1 \n" | |
453 | " bnez %[sets], 1b \n" | |
454 | " addiu %[addr], %[addr], 0x20 \n" | |
455 | " li %[val], 0x7 \n" /* *state_addr = CPU_DEAD; */ | |
456 | " sw %[val], (%[state_addr]) \n" | |
457 | " sync \n" | |
458 | " cache 21, (%[state_addr]) \n" /* flush entry of *state_addr */ | |
459 | " .set pop \n" | |
460 | : [addr] "=&r" (addr), [val] "=&r" (val) | |
461 | : [state_addr] "r" (state_addr), | |
462 | [sets] "r" (cpu_data[smp_processor_id()].dcache.sets)); | |
463 | ||
464 | __asm__ __volatile__( | |
465 | " .set push \n" | |
466 | " .set noreorder \n" | |
467 | " .set mips64 \n" | |
468 | " mfc0 %[cpuid], $15, 1 \n" | |
469 | " andi %[cpuid], 0x3ff \n" | |
470 | " dli %[base], 0x900000003ff01000 \n" | |
471 | " andi %[core], %[cpuid], 0x3 \n" | |
472 | " sll %[core], 8 \n" /* get core id */ | |
473 | " or %[base], %[base], %[core] \n" | |
474 | " andi %[node], %[cpuid], 0xc \n" | |
475 | " dsll %[node], 42 \n" /* get node id */ | |
476 | " or %[base], %[base], %[node] \n" | |
477 | "1: li %[count], 0x100 \n" /* wait for init loop */ | |
478 | "2: bnez %[count], 2b \n" /* limit mailbox access */ | |
479 | " addiu %[count], -1 \n" | |
480 | " ld %[initfunc], 0x20(%[base]) \n" /* get PC via mailbox */ | |
481 | " beqz %[initfunc], 1b \n" | |
482 | " nop \n" | |
483 | " ld $sp, 0x28(%[base]) \n" /* get SP via mailbox */ | |
484 | " ld $gp, 0x30(%[base]) \n" /* get GP via mailbox */ | |
485 | " ld $a1, 0x38(%[base]) \n" | |
486 | " jr %[initfunc] \n" /* jump to initial PC */ | |
487 | " nop \n" | |
488 | " .set pop \n" | |
489 | : [core] "=&r" (core), [node] "=&r" (node), | |
490 | [base] "=&r" (base), [cpuid] "=&r" (cpuid), | |
491 | [count] "=&r" (count), [initfunc] "=&r" (initfunc) | |
492 | : /* No Input */ | |
493 | : "a1"); | |
494 | } | |
495 | ||
e7841be5 HC |
496 | static void loongson3b_play_dead(int *state_addr) |
497 | { | |
498 | register int val; | |
499 | register long cpuid, core, node, count; | |
500 | register void *addr, *base, *initfunc; | |
501 | ||
502 | __asm__ __volatile__( | |
503 | " .set push \n" | |
504 | " .set noreorder \n" | |
505 | " li %[addr], 0x80000000 \n" /* KSEG0 */ | |
506 | "1: cache 0, 0(%[addr]) \n" /* flush L1 ICache */ | |
507 | " cache 0, 1(%[addr]) \n" | |
508 | " cache 0, 2(%[addr]) \n" | |
509 | " cache 0, 3(%[addr]) \n" | |
510 | " cache 1, 0(%[addr]) \n" /* flush L1 DCache */ | |
511 | " cache 1, 1(%[addr]) \n" | |
512 | " cache 1, 2(%[addr]) \n" | |
513 | " cache 1, 3(%[addr]) \n" | |
514 | " addiu %[sets], %[sets], -1 \n" | |
515 | " bnez %[sets], 1b \n" | |
516 | " addiu %[addr], %[addr], 0x20 \n" | |
517 | " li %[val], 0x7 \n" /* *state_addr = CPU_DEAD; */ | |
518 | " sw %[val], (%[state_addr]) \n" | |
519 | " sync \n" | |
520 | " cache 21, (%[state_addr]) \n" /* flush entry of *state_addr */ | |
521 | " .set pop \n" | |
522 | : [addr] "=&r" (addr), [val] "=&r" (val) | |
523 | : [state_addr] "r" (state_addr), | |
524 | [sets] "r" (cpu_data[smp_processor_id()].dcache.sets)); | |
525 | ||
526 | __asm__ __volatile__( | |
527 | " .set push \n" | |
528 | " .set noreorder \n" | |
529 | " .set mips64 \n" | |
530 | " mfc0 %[cpuid], $15, 1 \n" | |
531 | " andi %[cpuid], 0x3ff \n" | |
532 | " dli %[base], 0x900000003ff01000 \n" | |
533 | " andi %[core], %[cpuid], 0x3 \n" | |
534 | " sll %[core], 8 \n" /* get core id */ | |
535 | " or %[base], %[base], %[core] \n" | |
536 | " andi %[node], %[cpuid], 0xc \n" | |
537 | " dsll %[node], 42 \n" /* get node id */ | |
538 | " or %[base], %[base], %[node] \n" | |
539 | " dsrl %[node], 30 \n" /* 15:14 */ | |
540 | " or %[base], %[base], %[node] \n" | |
541 | "1: li %[count], 0x100 \n" /* wait for init loop */ | |
542 | "2: bnez %[count], 2b \n" /* limit mailbox access */ | |
543 | " addiu %[count], -1 \n" | |
544 | " ld %[initfunc], 0x20(%[base]) \n" /* get PC via mailbox */ | |
545 | " beqz %[initfunc], 1b \n" | |
546 | " nop \n" | |
547 | " ld $sp, 0x28(%[base]) \n" /* get SP via mailbox */ | |
548 | " ld $gp, 0x30(%[base]) \n" /* get GP via mailbox */ | |
549 | " ld $a1, 0x38(%[base]) \n" | |
550 | " jr %[initfunc] \n" /* jump to initial PC */ | |
551 | " nop \n" | |
552 | " .set pop \n" | |
553 | : [core] "=&r" (core), [node] "=&r" (node), | |
554 | [base] "=&r" (base), [cpuid] "=&r" (cpuid), | |
555 | [count] "=&r" (count), [initfunc] "=&r" (initfunc) | |
556 | : /* No Input */ | |
557 | : "a1"); | |
558 | } | |
559 | ||
c4a987db HC |
560 | void play_dead(void) |
561 | { | |
562 | int *state_addr; | |
563 | unsigned int cpu = smp_processor_id(); | |
564 | void (*play_dead_at_ckseg1)(int *); | |
565 | ||
566 | idle_task_exit(); | |
e7841be5 HC |
567 | switch (loongson_sysconf.cputype) { |
568 | case Loongson_3A: | |
569 | default: | |
570 | play_dead_at_ckseg1 = | |
571 | (void *)CKSEG1ADDR((unsigned long)loongson3a_play_dead); | |
572 | break; | |
573 | case Loongson_3B: | |
574 | play_dead_at_ckseg1 = | |
575 | (void *)CKSEG1ADDR((unsigned long)loongson3b_play_dead); | |
576 | break; | |
577 | } | |
c4a987db HC |
578 | state_addr = &per_cpu(cpu_state, cpu); |
579 | mb(); | |
580 | play_dead_at_ckseg1(state_addr); | |
581 | } | |
582 | ||
e7841be5 HC |
583 | void loongson3_disable_clock(int cpu) |
584 | { | |
585 | uint64_t core_id = cpu_data[cpu].core; | |
586 | uint64_t package_id = cpu_data[cpu].package; | |
587 | ||
588 | if (loongson_sysconf.cputype == Loongson_3A) { | |
589 | LOONGSON_CHIPCFG(package_id) &= ~(1 << (12 + core_id)); | |
590 | } else if (loongson_sysconf.cputype == Loongson_3B) { | |
3adeb256 | 591 | if (!(loongson_sysconf.workarounds & WORKAROUND_CPUHOTPLUG)) |
e7841be5 HC |
592 | LOONGSON_FREQCTRL(package_id) &= ~(1 << (core_id * 4 + 3)); |
593 | } | |
594 | } | |
595 | ||
596 | void loongson3_enable_clock(int cpu) | |
597 | { | |
598 | uint64_t core_id = cpu_data[cpu].core; | |
599 | uint64_t package_id = cpu_data[cpu].package; | |
600 | ||
601 | if (loongson_sysconf.cputype == Loongson_3A) { | |
602 | LOONGSON_CHIPCFG(package_id) |= 1 << (12 + core_id); | |
603 | } else if (loongson_sysconf.cputype == Loongson_3B) { | |
3adeb256 | 604 | if (!(loongson_sysconf.workarounds & WORKAROUND_CPUHOTPLUG)) |
e7841be5 HC |
605 | LOONGSON_FREQCTRL(package_id) |= 1 << (core_id * 4 + 3); |
606 | } | |
607 | } | |
608 | ||
c4a987db HC |
609 | #define CPU_POST_DEAD_FROZEN (CPU_POST_DEAD | CPU_TASKS_FROZEN) |
610 | static int loongson3_cpu_callback(struct notifier_block *nfb, | |
611 | unsigned long action, void *hcpu) | |
612 | { | |
613 | unsigned int cpu = (unsigned long)hcpu; | |
614 | ||
615 | switch (action) { | |
616 | case CPU_POST_DEAD: | |
617 | case CPU_POST_DEAD_FROZEN: | |
618 | pr_info("Disable clock for CPU#%d\n", cpu); | |
e7841be5 | 619 | loongson3_disable_clock(cpu); |
c4a987db HC |
620 | break; |
621 | case CPU_UP_PREPARE: | |
622 | case CPU_UP_PREPARE_FROZEN: | |
623 | pr_info("Enable clock for CPU#%d\n", cpu); | |
e7841be5 | 624 | loongson3_enable_clock(cpu); |
c4a987db HC |
625 | break; |
626 | } | |
627 | ||
628 | return NOTIFY_OK; | |
629 | } | |
630 | ||
631 | static int register_loongson3_notifier(void) | |
632 | { | |
633 | hotcpu_notifier(loongson3_cpu_callback, 0); | |
634 | return 0; | |
635 | } | |
636 | early_initcall(register_loongson3_notifier); | |
637 | ||
638 | #endif | |
639 | ||
300459d5 HC |
640 | struct plat_smp_ops loongson3_smp_ops = { |
641 | .send_ipi_single = loongson3_send_ipi_single, | |
642 | .send_ipi_mask = loongson3_send_ipi_mask, | |
643 | .init_secondary = loongson3_init_secondary, | |
644 | .smp_finish = loongson3_smp_finish, | |
300459d5 HC |
645 | .boot_secondary = loongson3_boot_secondary, |
646 | .smp_setup = loongson3_smp_setup, | |
647 | .prepare_cpus = loongson3_prepare_cpus, | |
c4a987db HC |
648 | #ifdef CONFIG_HOTPLUG_CPU |
649 | .cpu_disable = loongson3_cpu_disable, | |
650 | .cpu_die = loongson3_cpu_die, | |
651 | #endif | |
300459d5 | 652 | }; |