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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> | |
ef8bd77f | 20 | #include <linux/sched/hotplug.h> |
68db0cf1 | 21 | #include <linux/sched/task_stack.h> |
300459d5 HC |
22 | #include <linux/smp.h> |
23 | #include <linux/cpufreq.h> | |
24 | #include <asm/processor.h> | |
25 | #include <asm/time.h> | |
26 | #include <asm/clock.h> | |
27 | #include <asm/tlbflush.h> | |
c4a987db | 28 | #include <asm/cacheflush.h> |
300459d5 | 29 | #include <loongson.h> |
3adeb256 | 30 | #include <workarounds.h> |
300459d5 HC |
31 | |
32 | #include "smp.h" | |
33 | ||
c4a987db | 34 | DEFINE_PER_CPU(int, cpu_state); |
c4a987db | 35 | |
e7841be5 HC |
36 | static void *ipi_set0_regs[16]; |
37 | static void *ipi_clear0_regs[16]; | |
38 | static void *ipi_status0_regs[16]; | |
39 | static void *ipi_en0_regs[16]; | |
40 | static void *ipi_mailbox_buf[16]; | |
57548432 | 41 | static uint32_t core0_c0count[NR_CPUS]; |
e7841be5 | 42 | |
300459d5 HC |
43 | /* read a 32bit value from ipi register */ |
44 | #define loongson3_ipi_read32(addr) readl(addr) | |
45 | /* read a 64bit value from ipi register */ | |
46 | #define loongson3_ipi_read64(addr) readq(addr) | |
47 | /* write a 32bit value to ipi register */ | |
48 | #define loongson3_ipi_write32(action, addr) \ | |
49 | do { \ | |
50 | writel(action, addr); \ | |
51 | __wbflush(); \ | |
52 | } while (0) | |
53 | /* write a 64bit value to ipi register */ | |
54 | #define loongson3_ipi_write64(action, addr) \ | |
55 | do { \ | |
56 | writeq(action, addr); \ | |
57 | __wbflush(); \ | |
58 | } while (0) | |
59 | ||
e7841be5 HC |
60 | static void ipi_set0_regs_init(void) |
61 | { | |
62 | ipi_set0_regs[0] = (void *) | |
63 | (SMP_CORE_GROUP0_BASE + SMP_CORE0_OFFSET + SET0); | |
64 | ipi_set0_regs[1] = (void *) | |
65 | (SMP_CORE_GROUP0_BASE + SMP_CORE1_OFFSET + SET0); | |
66 | ipi_set0_regs[2] = (void *) | |
67 | (SMP_CORE_GROUP0_BASE + SMP_CORE2_OFFSET + SET0); | |
68 | ipi_set0_regs[3] = (void *) | |
69 | (SMP_CORE_GROUP0_BASE + SMP_CORE3_OFFSET + SET0); | |
70 | ipi_set0_regs[4] = (void *) | |
71 | (SMP_CORE_GROUP1_BASE + SMP_CORE0_OFFSET + SET0); | |
72 | ipi_set0_regs[5] = (void *) | |
73 | (SMP_CORE_GROUP1_BASE + SMP_CORE1_OFFSET + SET0); | |
74 | ipi_set0_regs[6] = (void *) | |
75 | (SMP_CORE_GROUP1_BASE + SMP_CORE2_OFFSET + SET0); | |
76 | ipi_set0_regs[7] = (void *) | |
77 | (SMP_CORE_GROUP1_BASE + SMP_CORE3_OFFSET + SET0); | |
78 | ipi_set0_regs[8] = (void *) | |
79 | (SMP_CORE_GROUP2_BASE + SMP_CORE0_OFFSET + SET0); | |
80 | ipi_set0_regs[9] = (void *) | |
81 | (SMP_CORE_GROUP2_BASE + SMP_CORE1_OFFSET + SET0); | |
82 | ipi_set0_regs[10] = (void *) | |
83 | (SMP_CORE_GROUP2_BASE + SMP_CORE2_OFFSET + SET0); | |
84 | ipi_set0_regs[11] = (void *) | |
85 | (SMP_CORE_GROUP2_BASE + SMP_CORE3_OFFSET + SET0); | |
86 | ipi_set0_regs[12] = (void *) | |
87 | (SMP_CORE_GROUP3_BASE + SMP_CORE0_OFFSET + SET0); | |
88 | ipi_set0_regs[13] = (void *) | |
89 | (SMP_CORE_GROUP3_BASE + SMP_CORE1_OFFSET + SET0); | |
90 | ipi_set0_regs[14] = (void *) | |
91 | (SMP_CORE_GROUP3_BASE + SMP_CORE2_OFFSET + SET0); | |
92 | ipi_set0_regs[15] = (void *) | |
93 | (SMP_CORE_GROUP3_BASE + SMP_CORE3_OFFSET + SET0); | |
94 | } | |
300459d5 | 95 | |
e7841be5 HC |
96 | static void ipi_clear0_regs_init(void) |
97 | { | |
98 | ipi_clear0_regs[0] = (void *) | |
99 | (SMP_CORE_GROUP0_BASE + SMP_CORE0_OFFSET + CLEAR0); | |
100 | ipi_clear0_regs[1] = (void *) | |
101 | (SMP_CORE_GROUP0_BASE + SMP_CORE1_OFFSET + CLEAR0); | |
102 | ipi_clear0_regs[2] = (void *) | |
103 | (SMP_CORE_GROUP0_BASE + SMP_CORE2_OFFSET + CLEAR0); | |
104 | ipi_clear0_regs[3] = (void *) | |
105 | (SMP_CORE_GROUP0_BASE + SMP_CORE3_OFFSET + CLEAR0); | |
106 | ipi_clear0_regs[4] = (void *) | |
107 | (SMP_CORE_GROUP1_BASE + SMP_CORE0_OFFSET + CLEAR0); | |
108 | ipi_clear0_regs[5] = (void *) | |
109 | (SMP_CORE_GROUP1_BASE + SMP_CORE1_OFFSET + CLEAR0); | |
110 | ipi_clear0_regs[6] = (void *) | |
111 | (SMP_CORE_GROUP1_BASE + SMP_CORE2_OFFSET + CLEAR0); | |
112 | ipi_clear0_regs[7] = (void *) | |
113 | (SMP_CORE_GROUP1_BASE + SMP_CORE3_OFFSET + CLEAR0); | |
114 | ipi_clear0_regs[8] = (void *) | |
115 | (SMP_CORE_GROUP2_BASE + SMP_CORE0_OFFSET + CLEAR0); | |
116 | ipi_clear0_regs[9] = (void *) | |
117 | (SMP_CORE_GROUP2_BASE + SMP_CORE1_OFFSET + CLEAR0); | |
118 | ipi_clear0_regs[10] = (void *) | |
119 | (SMP_CORE_GROUP2_BASE + SMP_CORE2_OFFSET + CLEAR0); | |
120 | ipi_clear0_regs[11] = (void *) | |
121 | (SMP_CORE_GROUP2_BASE + SMP_CORE3_OFFSET + CLEAR0); | |
122 | ipi_clear0_regs[12] = (void *) | |
123 | (SMP_CORE_GROUP3_BASE + SMP_CORE0_OFFSET + CLEAR0); | |
124 | ipi_clear0_regs[13] = (void *) | |
125 | (SMP_CORE_GROUP3_BASE + SMP_CORE1_OFFSET + CLEAR0); | |
126 | ipi_clear0_regs[14] = (void *) | |
127 | (SMP_CORE_GROUP3_BASE + SMP_CORE2_OFFSET + CLEAR0); | |
128 | ipi_clear0_regs[15] = (void *) | |
129 | (SMP_CORE_GROUP3_BASE + SMP_CORE3_OFFSET + CLEAR0); | |
130 | } | |
300459d5 | 131 | |
e7841be5 HC |
132 | static void ipi_status0_regs_init(void) |
133 | { | |
134 | ipi_status0_regs[0] = (void *) | |
135 | (SMP_CORE_GROUP0_BASE + SMP_CORE0_OFFSET + STATUS0); | |
136 | ipi_status0_regs[1] = (void *) | |
137 | (SMP_CORE_GROUP0_BASE + SMP_CORE1_OFFSET + STATUS0); | |
138 | ipi_status0_regs[2] = (void *) | |
139 | (SMP_CORE_GROUP0_BASE + SMP_CORE2_OFFSET + STATUS0); | |
140 | ipi_status0_regs[3] = (void *) | |
141 | (SMP_CORE_GROUP0_BASE + SMP_CORE3_OFFSET + STATUS0); | |
142 | ipi_status0_regs[4] = (void *) | |
143 | (SMP_CORE_GROUP1_BASE + SMP_CORE0_OFFSET + STATUS0); | |
144 | ipi_status0_regs[5] = (void *) | |
145 | (SMP_CORE_GROUP1_BASE + SMP_CORE1_OFFSET + STATUS0); | |
146 | ipi_status0_regs[6] = (void *) | |
147 | (SMP_CORE_GROUP1_BASE + SMP_CORE2_OFFSET + STATUS0); | |
148 | ipi_status0_regs[7] = (void *) | |
149 | (SMP_CORE_GROUP1_BASE + SMP_CORE3_OFFSET + STATUS0); | |
150 | ipi_status0_regs[8] = (void *) | |
151 | (SMP_CORE_GROUP2_BASE + SMP_CORE0_OFFSET + STATUS0); | |
152 | ipi_status0_regs[9] = (void *) | |
153 | (SMP_CORE_GROUP2_BASE + SMP_CORE1_OFFSET + STATUS0); | |
154 | ipi_status0_regs[10] = (void *) | |
155 | (SMP_CORE_GROUP2_BASE + SMP_CORE2_OFFSET + STATUS0); | |
156 | ipi_status0_regs[11] = (void *) | |
157 | (SMP_CORE_GROUP2_BASE + SMP_CORE3_OFFSET + STATUS0); | |
158 | ipi_status0_regs[12] = (void *) | |
159 | (SMP_CORE_GROUP3_BASE + SMP_CORE0_OFFSET + STATUS0); | |
160 | ipi_status0_regs[13] = (void *) | |
161 | (SMP_CORE_GROUP3_BASE + SMP_CORE1_OFFSET + STATUS0); | |
162 | ipi_status0_regs[14] = (void *) | |
163 | (SMP_CORE_GROUP3_BASE + SMP_CORE2_OFFSET + STATUS0); | |
164 | ipi_status0_regs[15] = (void *) | |
165 | (SMP_CORE_GROUP3_BASE + SMP_CORE3_OFFSET + STATUS0); | |
166 | } | |
300459d5 | 167 | |
e7841be5 HC |
168 | static void ipi_en0_regs_init(void) |
169 | { | |
170 | ipi_en0_regs[0] = (void *) | |
171 | (SMP_CORE_GROUP0_BASE + SMP_CORE0_OFFSET + EN0); | |
172 | ipi_en0_regs[1] = (void *) | |
173 | (SMP_CORE_GROUP0_BASE + SMP_CORE1_OFFSET + EN0); | |
174 | ipi_en0_regs[2] = (void *) | |
175 | (SMP_CORE_GROUP0_BASE + SMP_CORE2_OFFSET + EN0); | |
176 | ipi_en0_regs[3] = (void *) | |
177 | (SMP_CORE_GROUP0_BASE + SMP_CORE3_OFFSET + EN0); | |
178 | ipi_en0_regs[4] = (void *) | |
179 | (SMP_CORE_GROUP1_BASE + SMP_CORE0_OFFSET + EN0); | |
180 | ipi_en0_regs[5] = (void *) | |
181 | (SMP_CORE_GROUP1_BASE + SMP_CORE1_OFFSET + EN0); | |
182 | ipi_en0_regs[6] = (void *) | |
183 | (SMP_CORE_GROUP1_BASE + SMP_CORE2_OFFSET + EN0); | |
184 | ipi_en0_regs[7] = (void *) | |
185 | (SMP_CORE_GROUP1_BASE + SMP_CORE3_OFFSET + EN0); | |
186 | ipi_en0_regs[8] = (void *) | |
187 | (SMP_CORE_GROUP2_BASE + SMP_CORE0_OFFSET + EN0); | |
188 | ipi_en0_regs[9] = (void *) | |
189 | (SMP_CORE_GROUP2_BASE + SMP_CORE1_OFFSET + EN0); | |
190 | ipi_en0_regs[10] = (void *) | |
191 | (SMP_CORE_GROUP2_BASE + SMP_CORE2_OFFSET + EN0); | |
192 | ipi_en0_regs[11] = (void *) | |
193 | (SMP_CORE_GROUP2_BASE + SMP_CORE3_OFFSET + EN0); | |
194 | ipi_en0_regs[12] = (void *) | |
195 | (SMP_CORE_GROUP3_BASE + SMP_CORE0_OFFSET + EN0); | |
196 | ipi_en0_regs[13] = (void *) | |
197 | (SMP_CORE_GROUP3_BASE + SMP_CORE1_OFFSET + EN0); | |
198 | ipi_en0_regs[14] = (void *) | |
199 | (SMP_CORE_GROUP3_BASE + SMP_CORE2_OFFSET + EN0); | |
200 | ipi_en0_regs[15] = (void *) | |
201 | (SMP_CORE_GROUP3_BASE + SMP_CORE3_OFFSET + EN0); | |
202 | } | |
300459d5 | 203 | |
e7841be5 HC |
204 | static void ipi_mailbox_buf_init(void) |
205 | { | |
206 | ipi_mailbox_buf[0] = (void *) | |
207 | (SMP_CORE_GROUP0_BASE + SMP_CORE0_OFFSET + BUF); | |
208 | ipi_mailbox_buf[1] = (void *) | |
209 | (SMP_CORE_GROUP0_BASE + SMP_CORE1_OFFSET + BUF); | |
210 | ipi_mailbox_buf[2] = (void *) | |
211 | (SMP_CORE_GROUP0_BASE + SMP_CORE2_OFFSET + BUF); | |
212 | ipi_mailbox_buf[3] = (void *) | |
213 | (SMP_CORE_GROUP0_BASE + SMP_CORE3_OFFSET + BUF); | |
214 | ipi_mailbox_buf[4] = (void *) | |
215 | (SMP_CORE_GROUP1_BASE + SMP_CORE0_OFFSET + BUF); | |
216 | ipi_mailbox_buf[5] = (void *) | |
217 | (SMP_CORE_GROUP1_BASE + SMP_CORE1_OFFSET + BUF); | |
218 | ipi_mailbox_buf[6] = (void *) | |
219 | (SMP_CORE_GROUP1_BASE + SMP_CORE2_OFFSET + BUF); | |
220 | ipi_mailbox_buf[7] = (void *) | |
221 | (SMP_CORE_GROUP1_BASE + SMP_CORE3_OFFSET + BUF); | |
222 | ipi_mailbox_buf[8] = (void *) | |
223 | (SMP_CORE_GROUP2_BASE + SMP_CORE0_OFFSET + BUF); | |
224 | ipi_mailbox_buf[9] = (void *) | |
225 | (SMP_CORE_GROUP2_BASE + SMP_CORE1_OFFSET + BUF); | |
226 | ipi_mailbox_buf[10] = (void *) | |
227 | (SMP_CORE_GROUP2_BASE + SMP_CORE2_OFFSET + BUF); | |
228 | ipi_mailbox_buf[11] = (void *) | |
229 | (SMP_CORE_GROUP2_BASE + SMP_CORE3_OFFSET + BUF); | |
230 | ipi_mailbox_buf[12] = (void *) | |
231 | (SMP_CORE_GROUP3_BASE + SMP_CORE0_OFFSET + BUF); | |
232 | ipi_mailbox_buf[13] = (void *) | |
233 | (SMP_CORE_GROUP3_BASE + SMP_CORE1_OFFSET + BUF); | |
234 | ipi_mailbox_buf[14] = (void *) | |
235 | (SMP_CORE_GROUP3_BASE + SMP_CORE2_OFFSET + BUF); | |
236 | ipi_mailbox_buf[15] = (void *) | |
237 | (SMP_CORE_GROUP3_BASE + SMP_CORE3_OFFSET + BUF); | |
238 | } | |
300459d5 HC |
239 | |
240 | /* | |
241 | * Simple enough, just poke the appropriate ipi register | |
242 | */ | |
243 | static void loongson3_send_ipi_single(int cpu, unsigned int action) | |
244 | { | |
ec0f8d3f | 245 | loongson3_ipi_write32((u32)action, ipi_set0_regs[cpu_logical_map(cpu)]); |
300459d5 HC |
246 | } |
247 | ||
248 | static void | |
249 | loongson3_send_ipi_mask(const struct cpumask *mask, unsigned int action) | |
250 | { | |
251 | unsigned int i; | |
252 | ||
253 | for_each_cpu(i, mask) | |
ec0f8d3f | 254 | loongson3_ipi_write32((u32)action, ipi_set0_regs[cpu_logical_map(i)]); |
300459d5 HC |
255 | } |
256 | ||
e1b88ca8 HC |
257 | #define IPI_IRQ_OFFSET 6 |
258 | ||
259 | void loongson3_send_irq_by_ipi(int cpu, int irqs) | |
260 | { | |
261 | loongson3_ipi_write32(irqs << IPI_IRQ_OFFSET, ipi_set0_regs[cpu_logical_map(cpu)]); | |
262 | } | |
263 | ||
300459d5 HC |
264 | void loongson3_ipi_interrupt(struct pt_regs *regs) |
265 | { | |
c4a987db | 266 | int i, cpu = smp_processor_id(); |
e1b88ca8 | 267 | unsigned int action, c0count, irqs; |
300459d5 HC |
268 | |
269 | /* Load the ipi register to figure out what we're supposed to do */ | |
ec0f8d3f | 270 | action = loongson3_ipi_read32(ipi_status0_regs[cpu_logical_map(cpu)]); |
e1b88ca8 | 271 | irqs = action >> IPI_IRQ_OFFSET; |
300459d5 HC |
272 | |
273 | /* Clear the ipi register to clear the interrupt */ | |
ec0f8d3f | 274 | loongson3_ipi_write32((u32)action, ipi_clear0_regs[cpu_logical_map(cpu)]); |
300459d5 HC |
275 | |
276 | if (action & SMP_RESCHEDULE_YOURSELF) | |
277 | scheduler_ipi(); | |
278 | ||
4ace6139 AS |
279 | if (action & SMP_CALL_FUNCTION) { |
280 | irq_enter(); | |
281 | generic_smp_call_function_interrupt(); | |
282 | irq_exit(); | |
283 | } | |
c4a987db HC |
284 | |
285 | if (action & SMP_ASK_C0COUNT) { | |
286 | BUG_ON(cpu != 0); | |
287 | c0count = read_c0_count(); | |
57548432 HC |
288 | c0count = c0count ? c0count : 1; |
289 | for (i = 1; i < nr_cpu_ids; i++) | |
290 | core0_c0count[i] = c0count; | |
291 | __wbflush(); /* Let others see the result ASAP */ | |
c4a987db | 292 | } |
e1b88ca8 HC |
293 | |
294 | if (irqs) { | |
295 | int irq; | |
296 | while ((irq = ffs(irqs))) { | |
297 | do_IRQ(irq-1); | |
298 | irqs &= ~(1<<(irq-1)); | |
299 | } | |
300 | } | |
300459d5 HC |
301 | } |
302 | ||
57548432 | 303 | #define MAX_LOOPS 800 |
300459d5 HC |
304 | /* |
305 | * SMP init and finish on secondary CPUs | |
306 | */ | |
307 | static void loongson3_init_secondary(void) | |
308 | { | |
309 | int i; | |
c4a987db HC |
310 | uint32_t initcount; |
311 | unsigned int cpu = smp_processor_id(); | |
300459d5 HC |
312 | unsigned int imask = STATUSF_IP7 | STATUSF_IP6 | |
313 | STATUSF_IP3 | STATUSF_IP2; | |
314 | ||
315 | /* Set interrupt mask, but don't enable */ | |
316 | change_c0_status(ST0_IM, imask); | |
317 | ||
ec0f8d3f HC |
318 | for (i = 0; i < num_possible_cpus(); i++) |
319 | loongson3_ipi_write32(0xffffffff, ipi_en0_regs[cpu_logical_map(i)]); | |
c4a987db HC |
320 | |
321 | per_cpu(cpu_state, cpu) = CPU_ONLINE; | |
f875a832 PB |
322 | cpu_set_core(&cpu_data[cpu], |
323 | cpu_logical_map(cpu) % loongson_sysconf.cores_per_package); | |
ec0f8d3f HC |
324 | cpu_data[cpu].package = |
325 | cpu_logical_map(cpu) / loongson_sysconf.cores_per_package; | |
c4a987db HC |
326 | |
327 | i = 0; | |
57548432 | 328 | core0_c0count[cpu] = 0; |
c4a987db | 329 | loongson3_send_ipi_single(0, SMP_ASK_C0COUNT); |
57548432 | 330 | while (!core0_c0count[cpu]) { |
c4a987db HC |
331 | i++; |
332 | cpu_relax(); | |
333 | } | |
334 | ||
335 | if (i > MAX_LOOPS) | |
336 | i = MAX_LOOPS; | |
57548432 HC |
337 | if (cpu_data[cpu].package) |
338 | initcount = core0_c0count[cpu] + i; | |
339 | else /* Local access is faster for loops */ | |
340 | initcount = core0_c0count[cpu] + i/2; | |
341 | ||
c4a987db | 342 | write_c0_count(initcount); |
300459d5 HC |
343 | } |
344 | ||
345 | static void loongson3_smp_finish(void) | |
346 | { | |
ec0f8d3f HC |
347 | int cpu = smp_processor_id(); |
348 | ||
300459d5 HC |
349 | write_c0_compare(read_c0_count() + mips_hpt_frequency/HZ); |
350 | local_irq_enable(); | |
351 | loongson3_ipi_write64(0, | |
ec0f8d3f | 352 | (void *)(ipi_mailbox_buf[cpu_logical_map(cpu)]+0x0)); |
300459d5 HC |
353 | pr_info("CPU#%d finished, CP0_ST=%x\n", |
354 | smp_processor_id(), read_c0_status()); | |
355 | } | |
356 | ||
357 | static void __init loongson3_smp_setup(void) | |
358 | { | |
ec0f8d3f | 359 | int i = 0, num = 0; /* i: physical id, num: logical id */ |
300459d5 HC |
360 | |
361 | init_cpu_possible(cpu_none_mask); | |
300459d5 HC |
362 | |
363 | /* For unified kernel, NR_CPUS is the maximum possible value, | |
364 | * loongson_sysconf.nr_cpus is the really present value */ | |
ec0f8d3f HC |
365 | while (i < loongson_sysconf.nr_cpus) { |
366 | if (loongson_sysconf.reserved_cpus_mask & (1<<i)) { | |
367 | /* Reserved physical CPU cores */ | |
368 | __cpu_number_map[i] = -1; | |
369 | } else { | |
370 | __cpu_number_map[i] = num; | |
371 | __cpu_logical_map[num] = i; | |
372 | set_cpu_possible(num, true); | |
373 | num++; | |
374 | } | |
375 | i++; | |
300459d5 | 376 | } |
ec0f8d3f HC |
377 | pr_info("Detected %i available CPU(s)\n", num); |
378 | ||
379 | while (num < loongson_sysconf.nr_cpus) { | |
380 | __cpu_logical_map[num] = -1; | |
381 | num++; | |
382 | } | |
383 | ||
e7841be5 HC |
384 | ipi_set0_regs_init(); |
385 | ipi_clear0_regs_init(); | |
386 | ipi_status0_regs_init(); | |
387 | ipi_en0_regs_init(); | |
388 | ipi_mailbox_buf_init(); | |
f875a832 PB |
389 | cpu_set_core(&cpu_data[0], |
390 | cpu_logical_map(0) % loongson_sysconf.cores_per_package); | |
ec0f8d3f | 391 | cpu_data[0].package = cpu_logical_map(0) / loongson_sysconf.cores_per_package; |
300459d5 HC |
392 | } |
393 | ||
394 | static void __init loongson3_prepare_cpus(unsigned int max_cpus) | |
395 | { | |
c4a987db HC |
396 | init_cpu_present(cpu_possible_mask); |
397 | per_cpu(cpu_state, smp_processor_id()) = CPU_ONLINE; | |
300459d5 HC |
398 | } |
399 | ||
400 | /* | |
401 | * Setup the PC, SP, and GP of a secondary processor and start it runing! | |
402 | */ | |
d595d423 | 403 | static int loongson3_boot_secondary(int cpu, struct task_struct *idle) |
300459d5 HC |
404 | { |
405 | unsigned long startargs[4]; | |
406 | ||
407 | pr_info("Booting CPU#%d...\n", cpu); | |
408 | ||
409 | /* startargs[] are initial PC, SP and GP for secondary CPU */ | |
410 | startargs[0] = (unsigned long)&smp_bootstrap; | |
411 | startargs[1] = (unsigned long)__KSTK_TOS(idle); | |
412 | startargs[2] = (unsigned long)task_thread_info(idle); | |
413 | startargs[3] = 0; | |
414 | ||
415 | pr_debug("CPU#%d, func_pc=%lx, sp=%lx, gp=%lx\n", | |
416 | cpu, startargs[0], startargs[1], startargs[2]); | |
417 | ||
ec0f8d3f HC |
418 | loongson3_ipi_write64(startargs[3], |
419 | (void *)(ipi_mailbox_buf[cpu_logical_map(cpu)]+0x18)); | |
420 | loongson3_ipi_write64(startargs[2], | |
421 | (void *)(ipi_mailbox_buf[cpu_logical_map(cpu)]+0x10)); | |
422 | loongson3_ipi_write64(startargs[1], | |
423 | (void *)(ipi_mailbox_buf[cpu_logical_map(cpu)]+0x8)); | |
424 | loongson3_ipi_write64(startargs[0], | |
425 | (void *)(ipi_mailbox_buf[cpu_logical_map(cpu)]+0x0)); | |
d595d423 | 426 | return 0; |
300459d5 HC |
427 | } |
428 | ||
c4a987db HC |
429 | #ifdef CONFIG_HOTPLUG_CPU |
430 | ||
431 | static int loongson3_cpu_disable(void) | |
432 | { | |
433 | unsigned long flags; | |
434 | unsigned int cpu = smp_processor_id(); | |
435 | ||
436 | if (cpu == 0) | |
437 | return -EBUSY; | |
438 | ||
439 | set_cpu_online(cpu, false); | |
826e99be | 440 | calculate_cpu_foreign_map(); |
c4a987db HC |
441 | local_irq_save(flags); |
442 | fixup_irqs(); | |
443 | local_irq_restore(flags); | |
c4a987db HC |
444 | local_flush_tlb_all(); |
445 | ||
446 | return 0; | |
447 | } | |
448 | ||
449 | ||
450 | static void loongson3_cpu_die(unsigned int cpu) | |
451 | { | |
452 | while (per_cpu(cpu_state, cpu) != CPU_DEAD) | |
453 | cpu_relax(); | |
454 | ||
455 | mb(); | |
456 | } | |
457 | ||
458 | /* To shutdown a core in Loongson 3, the target core should go to CKSEG1 and | |
459 | * flush all L1 entries at first. Then, another core (usually Core 0) can | |
460 | * safely disable the clock of the target core. loongson3_play_dead() is | |
461 | * called via CKSEG1 (uncached and unmmaped) */ | |
b2edcfc8 | 462 | static void loongson3a_r1_play_dead(int *state_addr) |
c4a987db HC |
463 | { |
464 | register int val; | |
465 | register long cpuid, core, node, count; | |
466 | register void *addr, *base, *initfunc; | |
467 | ||
468 | __asm__ __volatile__( | |
469 | " .set push \n" | |
470 | " .set noreorder \n" | |
471 | " li %[addr], 0x80000000 \n" /* KSEG0 */ | |
472 | "1: cache 0, 0(%[addr]) \n" /* flush L1 ICache */ | |
473 | " cache 0, 1(%[addr]) \n" | |
474 | " cache 0, 2(%[addr]) \n" | |
475 | " cache 0, 3(%[addr]) \n" | |
476 | " cache 1, 0(%[addr]) \n" /* flush L1 DCache */ | |
477 | " cache 1, 1(%[addr]) \n" | |
478 | " cache 1, 2(%[addr]) \n" | |
479 | " cache 1, 3(%[addr]) \n" | |
480 | " addiu %[sets], %[sets], -1 \n" | |
481 | " bnez %[sets], 1b \n" | |
482 | " addiu %[addr], %[addr], 0x20 \n" | |
483 | " li %[val], 0x7 \n" /* *state_addr = CPU_DEAD; */ | |
484 | " sw %[val], (%[state_addr]) \n" | |
485 | " sync \n" | |
486 | " cache 21, (%[state_addr]) \n" /* flush entry of *state_addr */ | |
487 | " .set pop \n" | |
488 | : [addr] "=&r" (addr), [val] "=&r" (val) | |
489 | : [state_addr] "r" (state_addr), | |
490 | [sets] "r" (cpu_data[smp_processor_id()].dcache.sets)); | |
491 | ||
492 | __asm__ __volatile__( | |
493 | " .set push \n" | |
494 | " .set noreorder \n" | |
495 | " .set mips64 \n" | |
496 | " mfc0 %[cpuid], $15, 1 \n" | |
497 | " andi %[cpuid], 0x3ff \n" | |
498 | " dli %[base], 0x900000003ff01000 \n" | |
499 | " andi %[core], %[cpuid], 0x3 \n" | |
500 | " sll %[core], 8 \n" /* get core id */ | |
501 | " or %[base], %[base], %[core] \n" | |
502 | " andi %[node], %[cpuid], 0xc \n" | |
503 | " dsll %[node], 42 \n" /* get node id */ | |
504 | " or %[base], %[base], %[node] \n" | |
505 | "1: li %[count], 0x100 \n" /* wait for init loop */ | |
506 | "2: bnez %[count], 2b \n" /* limit mailbox access */ | |
507 | " addiu %[count], -1 \n" | |
508 | " ld %[initfunc], 0x20(%[base]) \n" /* get PC via mailbox */ | |
509 | " beqz %[initfunc], 1b \n" | |
510 | " nop \n" | |
511 | " ld $sp, 0x28(%[base]) \n" /* get SP via mailbox */ | |
512 | " ld $gp, 0x30(%[base]) \n" /* get GP via mailbox */ | |
513 | " ld $a1, 0x38(%[base]) \n" | |
514 | " jr %[initfunc] \n" /* jump to initial PC */ | |
515 | " nop \n" | |
516 | " .set pop \n" | |
517 | : [core] "=&r" (core), [node] "=&r" (node), | |
518 | [base] "=&r" (base), [cpuid] "=&r" (cpuid), | |
519 | [count] "=&r" (count), [initfunc] "=&r" (initfunc) | |
520 | : /* No Input */ | |
521 | : "a1"); | |
522 | } | |
523 | ||
0a00024d | 524 | static void loongson3a_r2r3_play_dead(int *state_addr) |
b2edcfc8 HC |
525 | { |
526 | register int val; | |
527 | register long cpuid, core, node, count; | |
528 | register void *addr, *base, *initfunc; | |
529 | ||
530 | __asm__ __volatile__( | |
531 | " .set push \n" | |
532 | " .set noreorder \n" | |
533 | " li %[addr], 0x80000000 \n" /* KSEG0 */ | |
534 | "1: cache 0, 0(%[addr]) \n" /* flush L1 ICache */ | |
535 | " cache 0, 1(%[addr]) \n" | |
536 | " cache 0, 2(%[addr]) \n" | |
537 | " cache 0, 3(%[addr]) \n" | |
538 | " cache 1, 0(%[addr]) \n" /* flush L1 DCache */ | |
539 | " cache 1, 1(%[addr]) \n" | |
540 | " cache 1, 2(%[addr]) \n" | |
541 | " cache 1, 3(%[addr]) \n" | |
542 | " addiu %[sets], %[sets], -1 \n" | |
543 | " bnez %[sets], 1b \n" | |
544 | " addiu %[addr], %[addr], 0x40 \n" | |
545 | " li %[addr], 0x80000000 \n" /* KSEG0 */ | |
546 | "2: cache 2, 0(%[addr]) \n" /* flush L1 VCache */ | |
547 | " cache 2, 1(%[addr]) \n" | |
548 | " cache 2, 2(%[addr]) \n" | |
549 | " cache 2, 3(%[addr]) \n" | |
550 | " cache 2, 4(%[addr]) \n" | |
551 | " cache 2, 5(%[addr]) \n" | |
552 | " cache 2, 6(%[addr]) \n" | |
553 | " cache 2, 7(%[addr]) \n" | |
554 | " cache 2, 8(%[addr]) \n" | |
555 | " cache 2, 9(%[addr]) \n" | |
556 | " cache 2, 10(%[addr]) \n" | |
557 | " cache 2, 11(%[addr]) \n" | |
558 | " cache 2, 12(%[addr]) \n" | |
559 | " cache 2, 13(%[addr]) \n" | |
560 | " cache 2, 14(%[addr]) \n" | |
561 | " cache 2, 15(%[addr]) \n" | |
562 | " addiu %[vsets], %[vsets], -1 \n" | |
563 | " bnez %[vsets], 2b \n" | |
564 | " addiu %[addr], %[addr], 0x40 \n" | |
565 | " li %[val], 0x7 \n" /* *state_addr = CPU_DEAD; */ | |
566 | " sw %[val], (%[state_addr]) \n" | |
567 | " sync \n" | |
568 | " cache 21, (%[state_addr]) \n" /* flush entry of *state_addr */ | |
569 | " .set pop \n" | |
570 | : [addr] "=&r" (addr), [val] "=&r" (val) | |
571 | : [state_addr] "r" (state_addr), | |
572 | [sets] "r" (cpu_data[smp_processor_id()].dcache.sets), | |
573 | [vsets] "r" (cpu_data[smp_processor_id()].vcache.sets)); | |
574 | ||
575 | __asm__ __volatile__( | |
576 | " .set push \n" | |
577 | " .set noreorder \n" | |
578 | " .set mips64 \n" | |
579 | " mfc0 %[cpuid], $15, 1 \n" | |
580 | " andi %[cpuid], 0x3ff \n" | |
581 | " dli %[base], 0x900000003ff01000 \n" | |
582 | " andi %[core], %[cpuid], 0x3 \n" | |
583 | " sll %[core], 8 \n" /* get core id */ | |
584 | " or %[base], %[base], %[core] \n" | |
585 | " andi %[node], %[cpuid], 0xc \n" | |
586 | " dsll %[node], 42 \n" /* get node id */ | |
587 | " or %[base], %[base], %[node] \n" | |
588 | "1: li %[count], 0x100 \n" /* wait for init loop */ | |
589 | "2: bnez %[count], 2b \n" /* limit mailbox access */ | |
590 | " addiu %[count], -1 \n" | |
591 | " ld %[initfunc], 0x20(%[base]) \n" /* get PC via mailbox */ | |
592 | " beqz %[initfunc], 1b \n" | |
593 | " nop \n" | |
594 | " ld $sp, 0x28(%[base]) \n" /* get SP via mailbox */ | |
595 | " ld $gp, 0x30(%[base]) \n" /* get GP via mailbox */ | |
596 | " ld $a1, 0x38(%[base]) \n" | |
597 | " jr %[initfunc] \n" /* jump to initial PC */ | |
598 | " nop \n" | |
599 | " .set pop \n" | |
600 | : [core] "=&r" (core), [node] "=&r" (node), | |
601 | [base] "=&r" (base), [cpuid] "=&r" (cpuid), | |
602 | [count] "=&r" (count), [initfunc] "=&r" (initfunc) | |
603 | : /* No Input */ | |
604 | : "a1"); | |
605 | } | |
606 | ||
e7841be5 HC |
607 | static void loongson3b_play_dead(int *state_addr) |
608 | { | |
609 | register int val; | |
610 | register long cpuid, core, node, count; | |
611 | register void *addr, *base, *initfunc; | |
612 | ||
613 | __asm__ __volatile__( | |
614 | " .set push \n" | |
615 | " .set noreorder \n" | |
616 | " li %[addr], 0x80000000 \n" /* KSEG0 */ | |
617 | "1: cache 0, 0(%[addr]) \n" /* flush L1 ICache */ | |
618 | " cache 0, 1(%[addr]) \n" | |
619 | " cache 0, 2(%[addr]) \n" | |
620 | " cache 0, 3(%[addr]) \n" | |
621 | " cache 1, 0(%[addr]) \n" /* flush L1 DCache */ | |
622 | " cache 1, 1(%[addr]) \n" | |
623 | " cache 1, 2(%[addr]) \n" | |
624 | " cache 1, 3(%[addr]) \n" | |
625 | " addiu %[sets], %[sets], -1 \n" | |
626 | " bnez %[sets], 1b \n" | |
627 | " addiu %[addr], %[addr], 0x20 \n" | |
628 | " li %[val], 0x7 \n" /* *state_addr = CPU_DEAD; */ | |
629 | " sw %[val], (%[state_addr]) \n" | |
630 | " sync \n" | |
631 | " cache 21, (%[state_addr]) \n" /* flush entry of *state_addr */ | |
632 | " .set pop \n" | |
633 | : [addr] "=&r" (addr), [val] "=&r" (val) | |
634 | : [state_addr] "r" (state_addr), | |
635 | [sets] "r" (cpu_data[smp_processor_id()].dcache.sets)); | |
636 | ||
637 | __asm__ __volatile__( | |
638 | " .set push \n" | |
639 | " .set noreorder \n" | |
640 | " .set mips64 \n" | |
641 | " mfc0 %[cpuid], $15, 1 \n" | |
642 | " andi %[cpuid], 0x3ff \n" | |
643 | " dli %[base], 0x900000003ff01000 \n" | |
644 | " andi %[core], %[cpuid], 0x3 \n" | |
645 | " sll %[core], 8 \n" /* get core id */ | |
646 | " or %[base], %[base], %[core] \n" | |
647 | " andi %[node], %[cpuid], 0xc \n" | |
648 | " dsll %[node], 42 \n" /* get node id */ | |
649 | " or %[base], %[base], %[node] \n" | |
650 | " dsrl %[node], 30 \n" /* 15:14 */ | |
651 | " or %[base], %[base], %[node] \n" | |
652 | "1: li %[count], 0x100 \n" /* wait for init loop */ | |
653 | "2: bnez %[count], 2b \n" /* limit mailbox access */ | |
654 | " addiu %[count], -1 \n" | |
655 | " ld %[initfunc], 0x20(%[base]) \n" /* get PC via mailbox */ | |
656 | " beqz %[initfunc], 1b \n" | |
657 | " nop \n" | |
658 | " ld $sp, 0x28(%[base]) \n" /* get SP via mailbox */ | |
659 | " ld $gp, 0x30(%[base]) \n" /* get GP via mailbox */ | |
660 | " ld $a1, 0x38(%[base]) \n" | |
661 | " jr %[initfunc] \n" /* jump to initial PC */ | |
662 | " nop \n" | |
663 | " .set pop \n" | |
664 | : [core] "=&r" (core), [node] "=&r" (node), | |
665 | [base] "=&r" (base), [cpuid] "=&r" (cpuid), | |
666 | [count] "=&r" (count), [initfunc] "=&r" (initfunc) | |
667 | : /* No Input */ | |
668 | : "a1"); | |
669 | } | |
670 | ||
c4a987db HC |
671 | void play_dead(void) |
672 | { | |
673 | int *state_addr; | |
674 | unsigned int cpu = smp_processor_id(); | |
675 | void (*play_dead_at_ckseg1)(int *); | |
676 | ||
677 | idle_task_exit(); | |
b2edcfc8 HC |
678 | switch (read_c0_prid() & PRID_REV_MASK) { |
679 | case PRID_REV_LOONGSON3A_R1: | |
e7841be5 HC |
680 | default: |
681 | play_dead_at_ckseg1 = | |
b2edcfc8 HC |
682 | (void *)CKSEG1ADDR((unsigned long)loongson3a_r1_play_dead); |
683 | break; | |
684 | case PRID_REV_LOONGSON3A_R2: | |
0a00024d | 685 | case PRID_REV_LOONGSON3A_R3: |
b2edcfc8 | 686 | play_dead_at_ckseg1 = |
0a00024d | 687 | (void *)CKSEG1ADDR((unsigned long)loongson3a_r2r3_play_dead); |
e7841be5 | 688 | break; |
b2edcfc8 HC |
689 | case PRID_REV_LOONGSON3B_R1: |
690 | case PRID_REV_LOONGSON3B_R2: | |
e7841be5 HC |
691 | play_dead_at_ckseg1 = |
692 | (void *)CKSEG1ADDR((unsigned long)loongson3b_play_dead); | |
693 | break; | |
694 | } | |
c4a987db HC |
695 | state_addr = &per_cpu(cpu_state, cpu); |
696 | mb(); | |
697 | play_dead_at_ckseg1(state_addr); | |
698 | } | |
699 | ||
e476d312 | 700 | static int loongson3_disable_clock(unsigned int cpu) |
e7841be5 | 701 | { |
f875a832 | 702 | uint64_t core_id = cpu_core(&cpu_data[cpu]); |
e7841be5 HC |
703 | uint64_t package_id = cpu_data[cpu].package; |
704 | ||
b2edcfc8 | 705 | if ((read_c0_prid() & PRID_REV_MASK) == PRID_REV_LOONGSON3A_R1) { |
e7841be5 | 706 | LOONGSON_CHIPCFG(package_id) &= ~(1 << (12 + core_id)); |
b2edcfc8 | 707 | } else { |
3adeb256 | 708 | if (!(loongson_sysconf.workarounds & WORKAROUND_CPUHOTPLUG)) |
e7841be5 HC |
709 | LOONGSON_FREQCTRL(package_id) &= ~(1 << (core_id * 4 + 3)); |
710 | } | |
e476d312 | 711 | return 0; |
e7841be5 HC |
712 | } |
713 | ||
e476d312 | 714 | static int loongson3_enable_clock(unsigned int cpu) |
e7841be5 | 715 | { |
f875a832 | 716 | uint64_t core_id = cpu_core(&cpu_data[cpu]); |
e7841be5 HC |
717 | uint64_t package_id = cpu_data[cpu].package; |
718 | ||
b2edcfc8 | 719 | if ((read_c0_prid() & PRID_REV_MASK) == PRID_REV_LOONGSON3A_R1) { |
e7841be5 | 720 | LOONGSON_CHIPCFG(package_id) |= 1 << (12 + core_id); |
b2edcfc8 | 721 | } else { |
3adeb256 | 722 | if (!(loongson_sysconf.workarounds & WORKAROUND_CPUHOTPLUG)) |
e7841be5 HC |
723 | LOONGSON_FREQCTRL(package_id) |= 1 << (core_id * 4 + 3); |
724 | } | |
e476d312 | 725 | return 0; |
c4a987db HC |
726 | } |
727 | ||
728 | static int register_loongson3_notifier(void) | |
729 | { | |
e476d312 SAS |
730 | return cpuhp_setup_state_nocalls(CPUHP_MIPS_SOC_PREPARE, |
731 | "mips/loongson:prepare", | |
732 | loongson3_enable_clock, | |
733 | loongson3_disable_clock); | |
c4a987db HC |
734 | } |
735 | early_initcall(register_loongson3_notifier); | |
736 | ||
737 | #endif | |
738 | ||
ff2c8252 | 739 | const struct plat_smp_ops loongson3_smp_ops = { |
300459d5 HC |
740 | .send_ipi_single = loongson3_send_ipi_single, |
741 | .send_ipi_mask = loongson3_send_ipi_mask, | |
742 | .init_secondary = loongson3_init_secondary, | |
743 | .smp_finish = loongson3_smp_finish, | |
300459d5 HC |
744 | .boot_secondary = loongson3_boot_secondary, |
745 | .smp_setup = loongson3_smp_setup, | |
746 | .prepare_cpus = loongson3_prepare_cpus, | |
c4a987db HC |
747 | #ifdef CONFIG_HOTPLUG_CPU |
748 | .cpu_disable = loongson3_cpu_disable, | |
749 | .cpu_die = loongson3_cpu_die, | |
750 | #endif | |
300459d5 | 751 | }; |