1 // SPDX-License-Identifier: GPL-2.0-or-later
23 #include <linux/cpu.h>
39 #include <asm/code-patching.h>
51  * The Primary thread of each non-boot processor was started from the OF client
57  * smp_startup_cpu() - start the given cpu
64  *	0	- failure
65  *	1	- success
82 	task_thread_info(paca_ptrs[lcpu]->__current)->preempt_count	= 0;  in smp_startup_cpu()
85 	 * If the RTAS start-cpu token does not exist then presume the  in smp_startup_cpu()
86 	 * cpu is already spinning.  in smp_startup_cpu()
88 	start_cpu = rtas_token("start-cpu");  in smp_startup_cpu()
94 		printk(KERN_ERR "start-cpu failed: %i\n", status);  in smp_startup_cpu()
101 static void smp_cell_setup_cpu(int cpu)  in smp_cell_setup_cpu()  argument
103 	if (cpu != boot_cpuid)  in smp_cell_setup_cpu()
112 static int smp_cell_kick_cpu(int nr)  in smp_cell_kick_cpu()  argument
114 	if (nr < 0 || nr >= nr_cpu_ids)  in smp_cell_kick_cpu()
115 		return -EINVAL;  in smp_cell_kick_cpu()
117 	if (!smp_startup_cpu(nr))  in smp_cell_kick_cpu()
118 		return -ENOENT;  in smp_cell_kick_cpu()
122 	 * cpu_start field to become non-zero After we set cpu_start,  in smp_cell_kick_cpu()
125 	paca_ptrs[nr]->cpu_start = 1;  in smp_cell_kick_cpu()
143 	DBG(" -> smp_init_cell()\n");  in smp_init_cell()
158 	/* Non-lpar has additional take/give timebase */  in smp_init_cell()
159 	if (rtas_token("freeze-time-base") != RTAS_UNKNOWN_SERVICE) {  in smp_init_cell()
160 		smp_ops->give_timebase = rtas_give_timebase;  in smp_init_cell()
161 		smp_ops->take_timebase = rtas_take_timebase;  in smp_init_cell()
164 	DBG(" <- smp_init_cell()\n");  in smp_init_cell()