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35 #include <linux/kernel.h>
36 #include <linux/delay.h>
37 #include <linux/init.h>
38 #include <linux/smp.h>
39 #include <linux/irq.h>
41 #include <asm/mmu_context.h>
43 #include <asm/netlogic/interrupt.h>
44 #include <asm/netlogic/mips-extns.h>
45 #include <asm/netlogic/haldefs.h>
46 #include <asm/netlogic/common.h>
48 #if defined(CONFIG_CPU_XLP)
49 #include <asm/netlogic/xlp-hal/iomap.h>
50 #include <asm/netlogic/xlp-hal/xlp.h>
51 #include <asm/netlogic/xlp-hal/pic.h>
52 #elif defined(CONFIG_CPU_XLR)
53 #include <asm/netlogic/xlr/iomap.h>
54 #include <asm/netlogic/xlr/pic.h>
55 #include <asm/netlogic/xlr/xlr.h>
60 void nlm_send_ipi_single(int logical_cpu, unsigned int action)
65 /* node id is part of hwtid, and needed for send_ipi */
66 hwtid = cpu_logical_map(logical_cpu);
67 picbase = nlm_get_node(nlm_hwtid_to_node(hwtid))->picbase;
69 if (action & SMP_CALL_FUNCTION)
70 nlm_pic_send_ipi(picbase, hwtid, IRQ_IPI_SMP_FUNCTION, 0);
71 if (action & SMP_RESCHEDULE_YOURSELF)
72 nlm_pic_send_ipi(picbase, hwtid, IRQ_IPI_SMP_RESCHEDULE, 0);
75 void nlm_send_ipi_mask(const struct cpumask *mask, unsigned int action)
79 for_each_cpu(cpu, mask) {
80 nlm_send_ipi_single(cpu, action);
84 /* IRQ_IPI_SMP_FUNCTION Handler */
85 void nlm_smp_function_ipi_handler(unsigned int irq, struct irq_desc *desc)
89 smp_call_function_interrupt();
93 /* IRQ_IPI_SMP_RESCHEDULE handler */
94 void nlm_smp_resched_ipi_handler(unsigned int irq, struct irq_desc *desc)
103 * Called before going into mips code, early cpu init
105 void nlm_early_init_secondary(int cpu)
107 change_c0_config(CONF_CM_CMASK, 0x3);
108 #ifdef CONFIG_CPU_XLP
111 write_c0_ebase(nlm_current_node()->ebase);
115 * Code to run on secondary just after probing the CPU
117 static void nlm_init_secondary(void)
121 hwtid = hard_smp_processor_id();
122 current_cpu_data.core = hwtid / NLM_THREADS_PER_CORE;
123 current_cpu_data.package = nlm_nodeid();
124 nlm_percpu_init(hwtid);
125 nlm_smp_irq_init(hwtid);
128 void nlm_prepare_cpus(unsigned int max_cpus)
130 /* declare we are SMT capable */
131 smp_num_siblings = nlm_threads_per_core;
134 void nlm_smp_finish(void)
140 * Boot all other cpus in the system, initialize them, and bring them into
143 unsigned long nlm_next_gp;
144 unsigned long nlm_next_sp;
145 static cpumask_t phys_cpu_present_mask;
147 void nlm_boot_secondary(int logical_cpu, struct task_struct *idle)
152 hwtid = cpu_logical_map(logical_cpu);
153 picbase = nlm_get_node(nlm_hwtid_to_node(hwtid))->picbase;
155 nlm_next_sp = (unsigned long)__KSTK_TOS(idle);
156 nlm_next_gp = (unsigned long)task_thread_info(idle);
158 /* barrier for sp/gp store above */
160 nlm_pic_send_ipi(picbase, hwtid, 1, 1); /* NMI */
163 void __init nlm_smp_setup(void)
165 unsigned int boot_cpu;
166 int num_cpus, i, ncore, node;
167 volatile u32 *cpu_ready = nlm_get_boot_data(BOOT_CPU_READY);
169 boot_cpu = hard_smp_processor_id();
170 cpumask_clear(&phys_cpu_present_mask);
172 cpumask_set_cpu(boot_cpu, &phys_cpu_present_mask);
173 __cpu_number_map[boot_cpu] = 0;
174 __cpu_logical_map[0] = boot_cpu;
175 set_cpu_possible(0, true);
178 for (i = 0; i < NR_CPUS; i++) {
180 * cpu_ready array is not set for the boot_cpu,
181 * it is only set for ASPs (see smpboot.S)
184 cpumask_set_cpu(i, &phys_cpu_present_mask);
185 __cpu_number_map[i] = num_cpus;
186 __cpu_logical_map[num_cpus] = i;
187 set_cpu_possible(num_cpus, true);
188 node = nlm_hwtid_to_node(i);
189 cpumask_set_cpu(num_cpus, &nlm_get_node(node)->cpumask);
194 pr_info("Physical CPU mask: %*pb\n",
195 cpumask_pr_args(&phys_cpu_present_mask));
196 pr_info("Possible CPU mask: %*pb\n",
197 cpumask_pr_args(cpu_possible_mask));
199 /* check with the cores we have woken up */
200 for (ncore = 0, i = 0; i < NLM_NR_NODES; i++)
201 ncore += hweight32(nlm_get_node(i)->coremask);
203 pr_info("Detected (%dc%dt) %d Slave CPU(s)\n", ncore,
204 nlm_threads_per_core, num_cpus);
206 /* switch NMI handler to boot CPUs */
207 nlm_set_nmi_handler(nlm_boot_secondary_cpus);
210 static int nlm_parse_cpumask(cpumask_t *wakeup_mask)
212 uint32_t core0_thr_mask, core_thr_mask;
213 int threadmode, i, j;
216 for (i = 0; i < NLM_THREADS_PER_CORE; i++)
217 if (cpumask_test_cpu(i, wakeup_mask))
218 core0_thr_mask |= (1 << i);
219 switch (core0_thr_mask) {
221 nlm_threads_per_core = 1;
225 nlm_threads_per_core = 2;
229 nlm_threads_per_core = 4;
236 /* Verify other cores CPU masks */
237 for (i = 0; i < NR_CPUS; i += NLM_THREADS_PER_CORE) {
239 for (j = 0; j < NLM_THREADS_PER_CORE; j++)
240 if (cpumask_test_cpu(i + j, wakeup_mask))
241 core_thr_mask |= (1 << j);
242 if (core_thr_mask != 0 && core_thr_mask != core0_thr_mask)
248 panic("Unsupported CPU mask %*pb", cpumask_pr_args(wakeup_mask));
252 int nlm_wakeup_secondary_cpus(void)
257 /* verify the mask and setup core config variables */
258 threadmode = nlm_parse_cpumask(&nlm_cpumask);
260 /* Setup CPU init parameters */
261 reset_data = nlm_get_boot_data(BOOT_THREAD_MODE);
262 *reset_data = threadmode;
264 #ifdef CONFIG_CPU_XLP
265 xlp_wakeup_secondary_cpus();
267 xlr_wakeup_secondary_cpus();
272 struct plat_smp_ops nlm_smp_ops = {
273 .send_ipi_single = nlm_send_ipi_single,
274 .send_ipi_mask = nlm_send_ipi_mask,
275 .init_secondary = nlm_init_secondary,
276 .smp_finish = nlm_smp_finish,
277 .boot_secondary = nlm_boot_secondary,
278 .smp_setup = nlm_smp_setup,
279 .prepare_cpus = nlm_prepare_cpus,