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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 HC |
27 | #include <loongson.h> |
28 | ||
29 | #include "smp.h" | |
30 | ||
c4a987db HC |
31 | DEFINE_PER_CPU(int, cpu_state); |
32 | DEFINE_PER_CPU(uint32_t, core0_c0count); | |
33 | ||
300459d5 HC |
34 | /* read a 32bit value from ipi register */ |
35 | #define loongson3_ipi_read32(addr) readl(addr) | |
36 | /* read a 64bit value from ipi register */ | |
37 | #define loongson3_ipi_read64(addr) readq(addr) | |
38 | /* write a 32bit value to ipi register */ | |
39 | #define loongson3_ipi_write32(action, addr) \ | |
40 | do { \ | |
41 | writel(action, addr); \ | |
42 | __wbflush(); \ | |
43 | } while (0) | |
44 | /* write a 64bit value to ipi register */ | |
45 | #define loongson3_ipi_write64(action, addr) \ | |
46 | do { \ | |
47 | writeq(action, addr); \ | |
48 | __wbflush(); \ | |
49 | } while (0) | |
50 | ||
51 | static void *ipi_set0_regs[] = { | |
52 | (void *)(SMP_CORE_GROUP0_BASE + SMP_CORE0_OFFSET + SET0), | |
53 | (void *)(SMP_CORE_GROUP0_BASE + SMP_CORE1_OFFSET + SET0), | |
54 | (void *)(SMP_CORE_GROUP0_BASE + SMP_CORE2_OFFSET + SET0), | |
55 | (void *)(SMP_CORE_GROUP0_BASE + SMP_CORE3_OFFSET + SET0), | |
56 | (void *)(SMP_CORE_GROUP1_BASE + SMP_CORE0_OFFSET + SET0), | |
57 | (void *)(SMP_CORE_GROUP1_BASE + SMP_CORE1_OFFSET + SET0), | |
58 | (void *)(SMP_CORE_GROUP1_BASE + SMP_CORE2_OFFSET + SET0), | |
59 | (void *)(SMP_CORE_GROUP1_BASE + SMP_CORE3_OFFSET + SET0), | |
60 | (void *)(SMP_CORE_GROUP2_BASE + SMP_CORE0_OFFSET + SET0), | |
61 | (void *)(SMP_CORE_GROUP2_BASE + SMP_CORE1_OFFSET + SET0), | |
62 | (void *)(SMP_CORE_GROUP2_BASE + SMP_CORE2_OFFSET + SET0), | |
63 | (void *)(SMP_CORE_GROUP2_BASE + SMP_CORE3_OFFSET + SET0), | |
64 | (void *)(SMP_CORE_GROUP3_BASE + SMP_CORE0_OFFSET + SET0), | |
65 | (void *)(SMP_CORE_GROUP3_BASE + SMP_CORE1_OFFSET + SET0), | |
66 | (void *)(SMP_CORE_GROUP3_BASE + SMP_CORE2_OFFSET + SET0), | |
67 | (void *)(SMP_CORE_GROUP3_BASE + SMP_CORE3_OFFSET + SET0), | |
68 | }; | |
69 | ||
70 | static void *ipi_clear0_regs[] = { | |
71 | (void *)(SMP_CORE_GROUP0_BASE + SMP_CORE0_OFFSET + CLEAR0), | |
72 | (void *)(SMP_CORE_GROUP0_BASE + SMP_CORE1_OFFSET + CLEAR0), | |
73 | (void *)(SMP_CORE_GROUP0_BASE + SMP_CORE2_OFFSET + CLEAR0), | |
74 | (void *)(SMP_CORE_GROUP0_BASE + SMP_CORE3_OFFSET + CLEAR0), | |
75 | (void *)(SMP_CORE_GROUP1_BASE + SMP_CORE0_OFFSET + CLEAR0), | |
76 | (void *)(SMP_CORE_GROUP1_BASE + SMP_CORE1_OFFSET + CLEAR0), | |
77 | (void *)(SMP_CORE_GROUP1_BASE + SMP_CORE2_OFFSET + CLEAR0), | |
78 | (void *)(SMP_CORE_GROUP1_BASE + SMP_CORE3_OFFSET + CLEAR0), | |
79 | (void *)(SMP_CORE_GROUP2_BASE + SMP_CORE0_OFFSET + CLEAR0), | |
80 | (void *)(SMP_CORE_GROUP2_BASE + SMP_CORE1_OFFSET + CLEAR0), | |
81 | (void *)(SMP_CORE_GROUP2_BASE + SMP_CORE2_OFFSET + CLEAR0), | |
82 | (void *)(SMP_CORE_GROUP2_BASE + SMP_CORE3_OFFSET + CLEAR0), | |
83 | (void *)(SMP_CORE_GROUP3_BASE + SMP_CORE0_OFFSET + CLEAR0), | |
84 | (void *)(SMP_CORE_GROUP3_BASE + SMP_CORE1_OFFSET + CLEAR0), | |
85 | (void *)(SMP_CORE_GROUP3_BASE + SMP_CORE2_OFFSET + CLEAR0), | |
86 | (void *)(SMP_CORE_GROUP3_BASE + SMP_CORE3_OFFSET + CLEAR0), | |
87 | }; | |
88 | ||
89 | static void *ipi_status0_regs[] = { | |
90 | (void *)(SMP_CORE_GROUP0_BASE + SMP_CORE0_OFFSET + STATUS0), | |
91 | (void *)(SMP_CORE_GROUP0_BASE + SMP_CORE1_OFFSET + STATUS0), | |
92 | (void *)(SMP_CORE_GROUP0_BASE + SMP_CORE2_OFFSET + STATUS0), | |
93 | (void *)(SMP_CORE_GROUP0_BASE + SMP_CORE3_OFFSET + STATUS0), | |
94 | (void *)(SMP_CORE_GROUP1_BASE + SMP_CORE0_OFFSET + STATUS0), | |
95 | (void *)(SMP_CORE_GROUP1_BASE + SMP_CORE1_OFFSET + STATUS0), | |
96 | (void *)(SMP_CORE_GROUP1_BASE + SMP_CORE2_OFFSET + STATUS0), | |
97 | (void *)(SMP_CORE_GROUP1_BASE + SMP_CORE3_OFFSET + STATUS0), | |
98 | (void *)(SMP_CORE_GROUP2_BASE + SMP_CORE0_OFFSET + STATUS0), | |
99 | (void *)(SMP_CORE_GROUP2_BASE + SMP_CORE1_OFFSET + STATUS0), | |
100 | (void *)(SMP_CORE_GROUP2_BASE + SMP_CORE2_OFFSET + STATUS0), | |
101 | (void *)(SMP_CORE_GROUP2_BASE + SMP_CORE3_OFFSET + STATUS0), | |
102 | (void *)(SMP_CORE_GROUP3_BASE + SMP_CORE0_OFFSET + STATUS0), | |
103 | (void *)(SMP_CORE_GROUP3_BASE + SMP_CORE1_OFFSET + STATUS0), | |
104 | (void *)(SMP_CORE_GROUP3_BASE + SMP_CORE2_OFFSET + STATUS0), | |
105 | (void *)(SMP_CORE_GROUP3_BASE + SMP_CORE3_OFFSET + STATUS0), | |
106 | }; | |
107 | ||
108 | static void *ipi_en0_regs[] = { | |
109 | (void *)(SMP_CORE_GROUP0_BASE + SMP_CORE0_OFFSET + EN0), | |
110 | (void *)(SMP_CORE_GROUP0_BASE + SMP_CORE1_OFFSET + EN0), | |
111 | (void *)(SMP_CORE_GROUP0_BASE + SMP_CORE2_OFFSET + EN0), | |
112 | (void *)(SMP_CORE_GROUP0_BASE + SMP_CORE3_OFFSET + EN0), | |
113 | (void *)(SMP_CORE_GROUP1_BASE + SMP_CORE0_OFFSET + EN0), | |
114 | (void *)(SMP_CORE_GROUP1_BASE + SMP_CORE1_OFFSET + EN0), | |
115 | (void *)(SMP_CORE_GROUP1_BASE + SMP_CORE2_OFFSET + EN0), | |
116 | (void *)(SMP_CORE_GROUP1_BASE + SMP_CORE3_OFFSET + EN0), | |
117 | (void *)(SMP_CORE_GROUP2_BASE + SMP_CORE0_OFFSET + EN0), | |
118 | (void *)(SMP_CORE_GROUP2_BASE + SMP_CORE1_OFFSET + EN0), | |
119 | (void *)(SMP_CORE_GROUP2_BASE + SMP_CORE2_OFFSET + EN0), | |
120 | (void *)(SMP_CORE_GROUP2_BASE + SMP_CORE3_OFFSET + EN0), | |
121 | (void *)(SMP_CORE_GROUP3_BASE + SMP_CORE0_OFFSET + EN0), | |
122 | (void *)(SMP_CORE_GROUP3_BASE + SMP_CORE1_OFFSET + EN0), | |
123 | (void *)(SMP_CORE_GROUP3_BASE + SMP_CORE2_OFFSET + EN0), | |
124 | (void *)(SMP_CORE_GROUP3_BASE + SMP_CORE3_OFFSET + EN0), | |
125 | }; | |
126 | ||
127 | static void *ipi_mailbox_buf[] = { | |
128 | (void *)(SMP_CORE_GROUP0_BASE + SMP_CORE0_OFFSET + BUF), | |
129 | (void *)(SMP_CORE_GROUP0_BASE + SMP_CORE1_OFFSET + BUF), | |
130 | (void *)(SMP_CORE_GROUP0_BASE + SMP_CORE2_OFFSET + BUF), | |
131 | (void *)(SMP_CORE_GROUP0_BASE + SMP_CORE3_OFFSET + BUF), | |
132 | (void *)(SMP_CORE_GROUP1_BASE + SMP_CORE0_OFFSET + BUF), | |
133 | (void *)(SMP_CORE_GROUP1_BASE + SMP_CORE1_OFFSET + BUF), | |
134 | (void *)(SMP_CORE_GROUP1_BASE + SMP_CORE2_OFFSET + BUF), | |
135 | (void *)(SMP_CORE_GROUP1_BASE + SMP_CORE3_OFFSET + BUF), | |
136 | (void *)(SMP_CORE_GROUP2_BASE + SMP_CORE0_OFFSET + BUF), | |
137 | (void *)(SMP_CORE_GROUP2_BASE + SMP_CORE1_OFFSET + BUF), | |
138 | (void *)(SMP_CORE_GROUP2_BASE + SMP_CORE2_OFFSET + BUF), | |
139 | (void *)(SMP_CORE_GROUP2_BASE + SMP_CORE3_OFFSET + BUF), | |
140 | (void *)(SMP_CORE_GROUP3_BASE + SMP_CORE0_OFFSET + BUF), | |
141 | (void *)(SMP_CORE_GROUP3_BASE + SMP_CORE1_OFFSET + BUF), | |
142 | (void *)(SMP_CORE_GROUP3_BASE + SMP_CORE2_OFFSET + BUF), | |
143 | (void *)(SMP_CORE_GROUP3_BASE + SMP_CORE3_OFFSET + BUF), | |
144 | }; | |
145 | ||
146 | /* | |
147 | * Simple enough, just poke the appropriate ipi register | |
148 | */ | |
149 | static void loongson3_send_ipi_single(int cpu, unsigned int action) | |
150 | { | |
151 | loongson3_ipi_write32((u32)action, ipi_set0_regs[cpu]); | |
152 | } | |
153 | ||
154 | static void | |
155 | loongson3_send_ipi_mask(const struct cpumask *mask, unsigned int action) | |
156 | { | |
157 | unsigned int i; | |
158 | ||
159 | for_each_cpu(i, mask) | |
160 | loongson3_ipi_write32((u32)action, ipi_set0_regs[i]); | |
161 | } | |
162 | ||
163 | void loongson3_ipi_interrupt(struct pt_regs *regs) | |
164 | { | |
c4a987db HC |
165 | int i, cpu = smp_processor_id(); |
166 | unsigned int action, c0count; | |
300459d5 HC |
167 | |
168 | /* Load the ipi register to figure out what we're supposed to do */ | |
169 | action = loongson3_ipi_read32(ipi_status0_regs[cpu]); | |
170 | ||
171 | /* Clear the ipi register to clear the interrupt */ | |
172 | loongson3_ipi_write32((u32)action, ipi_clear0_regs[cpu]); | |
173 | ||
174 | if (action & SMP_RESCHEDULE_YOURSELF) | |
175 | scheduler_ipi(); | |
176 | ||
177 | if (action & SMP_CALL_FUNCTION) | |
178 | smp_call_function_interrupt(); | |
c4a987db HC |
179 | |
180 | if (action & SMP_ASK_C0COUNT) { | |
181 | BUG_ON(cpu != 0); | |
182 | c0count = read_c0_count(); | |
183 | for (i = 1; i < loongson_sysconf.nr_cpus; i++) | |
184 | per_cpu(core0_c0count, i) = c0count; | |
185 | } | |
300459d5 HC |
186 | } |
187 | ||
c4a987db | 188 | #define MAX_LOOPS 1111 |
300459d5 HC |
189 | /* |
190 | * SMP init and finish on secondary CPUs | |
191 | */ | |
192 | static void loongson3_init_secondary(void) | |
193 | { | |
194 | int i; | |
c4a987db HC |
195 | uint32_t initcount; |
196 | unsigned int cpu = smp_processor_id(); | |
300459d5 HC |
197 | unsigned int imask = STATUSF_IP7 | STATUSF_IP6 | |
198 | STATUSF_IP3 | STATUSF_IP2; | |
199 | ||
200 | /* Set interrupt mask, but don't enable */ | |
201 | change_c0_status(ST0_IM, imask); | |
202 | ||
203 | for (i = 0; i < loongson_sysconf.nr_cpus; i++) | |
204 | loongson3_ipi_write32(0xffffffff, ipi_en0_regs[i]); | |
c4a987db | 205 | |
c4617318 HC |
206 | cpu_data[cpu].package = cpu / loongson_sysconf.cores_per_package; |
207 | cpu_data[cpu].core = cpu % loongson_sysconf.cores_per_package; | |
c4a987db HC |
208 | per_cpu(cpu_state, cpu) = CPU_ONLINE; |
209 | ||
210 | i = 0; | |
211 | __get_cpu_var(core0_c0count) = 0; | |
212 | loongson3_send_ipi_single(0, SMP_ASK_C0COUNT); | |
213 | while (!__get_cpu_var(core0_c0count)) { | |
214 | i++; | |
215 | cpu_relax(); | |
216 | } | |
217 | ||
218 | if (i > MAX_LOOPS) | |
219 | i = MAX_LOOPS; | |
220 | initcount = __get_cpu_var(core0_c0count) + i; | |
221 | write_c0_count(initcount); | |
300459d5 HC |
222 | } |
223 | ||
224 | static void loongson3_smp_finish(void) | |
225 | { | |
226 | write_c0_compare(read_c0_count() + mips_hpt_frequency/HZ); | |
227 | local_irq_enable(); | |
228 | loongson3_ipi_write64(0, | |
229 | (void *)(ipi_mailbox_buf[smp_processor_id()]+0x0)); | |
230 | pr_info("CPU#%d finished, CP0_ST=%x\n", | |
231 | smp_processor_id(), read_c0_status()); | |
232 | } | |
233 | ||
234 | static void __init loongson3_smp_setup(void) | |
235 | { | |
236 | int i, num; | |
237 | ||
238 | init_cpu_possible(cpu_none_mask); | |
239 | set_cpu_possible(0, true); | |
240 | ||
241 | __cpu_number_map[0] = 0; | |
242 | __cpu_logical_map[0] = 0; | |
243 | ||
244 | /* For unified kernel, NR_CPUS is the maximum possible value, | |
245 | * loongson_sysconf.nr_cpus is the really present value */ | |
246 | for (i = 1, num = 0; i < loongson_sysconf.nr_cpus; i++) { | |
247 | set_cpu_possible(i, true); | |
248 | __cpu_number_map[i] = ++num; | |
249 | __cpu_logical_map[num] = i; | |
250 | } | |
251 | pr_info("Detected %i available secondary CPU(s)\n", num); | |
252 | } | |
253 | ||
254 | static void __init loongson3_prepare_cpus(unsigned int max_cpus) | |
255 | { | |
c4a987db HC |
256 | init_cpu_present(cpu_possible_mask); |
257 | per_cpu(cpu_state, smp_processor_id()) = CPU_ONLINE; | |
300459d5 HC |
258 | } |
259 | ||
260 | /* | |
261 | * Setup the PC, SP, and GP of a secondary processor and start it runing! | |
262 | */ | |
263 | static void loongson3_boot_secondary(int cpu, struct task_struct *idle) | |
264 | { | |
265 | unsigned long startargs[4]; | |
266 | ||
267 | pr_info("Booting CPU#%d...\n", cpu); | |
268 | ||
269 | /* startargs[] are initial PC, SP and GP for secondary CPU */ | |
270 | startargs[0] = (unsigned long)&smp_bootstrap; | |
271 | startargs[1] = (unsigned long)__KSTK_TOS(idle); | |
272 | startargs[2] = (unsigned long)task_thread_info(idle); | |
273 | startargs[3] = 0; | |
274 | ||
275 | pr_debug("CPU#%d, func_pc=%lx, sp=%lx, gp=%lx\n", | |
276 | cpu, startargs[0], startargs[1], startargs[2]); | |
277 | ||
278 | loongson3_ipi_write64(startargs[3], (void *)(ipi_mailbox_buf[cpu]+0x18)); | |
279 | loongson3_ipi_write64(startargs[2], (void *)(ipi_mailbox_buf[cpu]+0x10)); | |
280 | loongson3_ipi_write64(startargs[1], (void *)(ipi_mailbox_buf[cpu]+0x8)); | |
281 | loongson3_ipi_write64(startargs[0], (void *)(ipi_mailbox_buf[cpu]+0x0)); | |
282 | } | |
283 | ||
c4a987db HC |
284 | #ifdef CONFIG_HOTPLUG_CPU |
285 | ||
286 | static int loongson3_cpu_disable(void) | |
287 | { | |
288 | unsigned long flags; | |
289 | unsigned int cpu = smp_processor_id(); | |
290 | ||
291 | if (cpu == 0) | |
292 | return -EBUSY; | |
293 | ||
294 | set_cpu_online(cpu, false); | |
295 | cpu_clear(cpu, cpu_callin_map); | |
296 | local_irq_save(flags); | |
297 | fixup_irqs(); | |
298 | local_irq_restore(flags); | |
299 | flush_cache_all(); | |
300 | local_flush_tlb_all(); | |
301 | ||
302 | return 0; | |
303 | } | |
304 | ||
305 | ||
306 | static void loongson3_cpu_die(unsigned int cpu) | |
307 | { | |
308 | while (per_cpu(cpu_state, cpu) != CPU_DEAD) | |
309 | cpu_relax(); | |
310 | ||
311 | mb(); | |
312 | } | |
313 | ||
314 | /* To shutdown a core in Loongson 3, the target core should go to CKSEG1 and | |
315 | * flush all L1 entries at first. Then, another core (usually Core 0) can | |
316 | * safely disable the clock of the target core. loongson3_play_dead() is | |
317 | * called via CKSEG1 (uncached and unmmaped) */ | |
318 | static void loongson3_play_dead(int *state_addr) | |
319 | { | |
320 | register int val; | |
321 | register long cpuid, core, node, count; | |
322 | register void *addr, *base, *initfunc; | |
323 | ||
324 | __asm__ __volatile__( | |
325 | " .set push \n" | |
326 | " .set noreorder \n" | |
327 | " li %[addr], 0x80000000 \n" /* KSEG0 */ | |
328 | "1: cache 0, 0(%[addr]) \n" /* flush L1 ICache */ | |
329 | " cache 0, 1(%[addr]) \n" | |
330 | " cache 0, 2(%[addr]) \n" | |
331 | " cache 0, 3(%[addr]) \n" | |
332 | " cache 1, 0(%[addr]) \n" /* flush L1 DCache */ | |
333 | " cache 1, 1(%[addr]) \n" | |
334 | " cache 1, 2(%[addr]) \n" | |
335 | " cache 1, 3(%[addr]) \n" | |
336 | " addiu %[sets], %[sets], -1 \n" | |
337 | " bnez %[sets], 1b \n" | |
338 | " addiu %[addr], %[addr], 0x20 \n" | |
339 | " li %[val], 0x7 \n" /* *state_addr = CPU_DEAD; */ | |
340 | " sw %[val], (%[state_addr]) \n" | |
341 | " sync \n" | |
342 | " cache 21, (%[state_addr]) \n" /* flush entry of *state_addr */ | |
343 | " .set pop \n" | |
344 | : [addr] "=&r" (addr), [val] "=&r" (val) | |
345 | : [state_addr] "r" (state_addr), | |
346 | [sets] "r" (cpu_data[smp_processor_id()].dcache.sets)); | |
347 | ||
348 | __asm__ __volatile__( | |
349 | " .set push \n" | |
350 | " .set noreorder \n" | |
351 | " .set mips64 \n" | |
352 | " mfc0 %[cpuid], $15, 1 \n" | |
353 | " andi %[cpuid], 0x3ff \n" | |
354 | " dli %[base], 0x900000003ff01000 \n" | |
355 | " andi %[core], %[cpuid], 0x3 \n" | |
356 | " sll %[core], 8 \n" /* get core id */ | |
357 | " or %[base], %[base], %[core] \n" | |
358 | " andi %[node], %[cpuid], 0xc \n" | |
359 | " dsll %[node], 42 \n" /* get node id */ | |
360 | " or %[base], %[base], %[node] \n" | |
361 | "1: li %[count], 0x100 \n" /* wait for init loop */ | |
362 | "2: bnez %[count], 2b \n" /* limit mailbox access */ | |
363 | " addiu %[count], -1 \n" | |
364 | " ld %[initfunc], 0x20(%[base]) \n" /* get PC via mailbox */ | |
365 | " beqz %[initfunc], 1b \n" | |
366 | " nop \n" | |
367 | " ld $sp, 0x28(%[base]) \n" /* get SP via mailbox */ | |
368 | " ld $gp, 0x30(%[base]) \n" /* get GP via mailbox */ | |
369 | " ld $a1, 0x38(%[base]) \n" | |
370 | " jr %[initfunc] \n" /* jump to initial PC */ | |
371 | " nop \n" | |
372 | " .set pop \n" | |
373 | : [core] "=&r" (core), [node] "=&r" (node), | |
374 | [base] "=&r" (base), [cpuid] "=&r" (cpuid), | |
375 | [count] "=&r" (count), [initfunc] "=&r" (initfunc) | |
376 | : /* No Input */ | |
377 | : "a1"); | |
378 | } | |
379 | ||
380 | void play_dead(void) | |
381 | { | |
382 | int *state_addr; | |
383 | unsigned int cpu = smp_processor_id(); | |
384 | void (*play_dead_at_ckseg1)(int *); | |
385 | ||
386 | idle_task_exit(); | |
387 | play_dead_at_ckseg1 = | |
388 | (void *)CKSEG1ADDR((unsigned long)loongson3_play_dead); | |
389 | state_addr = &per_cpu(cpu_state, cpu); | |
390 | mb(); | |
391 | play_dead_at_ckseg1(state_addr); | |
392 | } | |
393 | ||
394 | #define CPU_POST_DEAD_FROZEN (CPU_POST_DEAD | CPU_TASKS_FROZEN) | |
395 | static int loongson3_cpu_callback(struct notifier_block *nfb, | |
396 | unsigned long action, void *hcpu) | |
397 | { | |
398 | unsigned int cpu = (unsigned long)hcpu; | |
c4617318 HC |
399 | uint64_t core_id = cpu_data[cpu].core; |
400 | uint64_t package_id = cpu_data[cpu].package; | |
c4a987db HC |
401 | |
402 | switch (action) { | |
403 | case CPU_POST_DEAD: | |
404 | case CPU_POST_DEAD_FROZEN: | |
405 | pr_info("Disable clock for CPU#%d\n", cpu); | |
c4617318 | 406 | LOONGSON_CHIPCFG(package_id) &= ~(1 << (12 + core_id)); |
c4a987db HC |
407 | break; |
408 | case CPU_UP_PREPARE: | |
409 | case CPU_UP_PREPARE_FROZEN: | |
410 | pr_info("Enable clock for CPU#%d\n", cpu); | |
c4617318 | 411 | LOONGSON_CHIPCFG(package_id) |= 1 << (12 + core_id); |
c4a987db HC |
412 | break; |
413 | } | |
414 | ||
415 | return NOTIFY_OK; | |
416 | } | |
417 | ||
418 | static int register_loongson3_notifier(void) | |
419 | { | |
420 | hotcpu_notifier(loongson3_cpu_callback, 0); | |
421 | return 0; | |
422 | } | |
423 | early_initcall(register_loongson3_notifier); | |
424 | ||
425 | #endif | |
426 | ||
300459d5 HC |
427 | struct plat_smp_ops loongson3_smp_ops = { |
428 | .send_ipi_single = loongson3_send_ipi_single, | |
429 | .send_ipi_mask = loongson3_send_ipi_mask, | |
430 | .init_secondary = loongson3_init_secondary, | |
431 | .smp_finish = loongson3_smp_finish, | |
300459d5 HC |
432 | .boot_secondary = loongson3_boot_secondary, |
433 | .smp_setup = loongson3_smp_setup, | |
434 | .prepare_cpus = loongson3_prepare_cpus, | |
c4a987db HC |
435 | #ifdef CONFIG_HOTPLUG_CPU |
436 | .cpu_disable = loongson3_cpu_disable, | |
437 | .cpu_die = loongson3_cpu_die, | |
438 | #endif | |
300459d5 | 439 | }; |