1 // SPDX-License-Identifier: GPL-2.0
3 * mp.c: OpenBoot Prom Multiprocessor support routines. Don't call
4 * these on a UP or else you will halt and catch fire. ;)
9 #include <linux/types.h>
10 #include <linux/kernel.h>
11 #include <linux/sched.h>
13 #include <asm/openprom.h>
14 #include <asm/oplib.h>
16 extern void restore_current(void);
18 /* Start cpu with prom-tree node 'cpunode' using context described
19 * by 'ctable_reg' in context 'ctx' at program counter 'pc'.
21 * XXX Have to look into what the return values mean. XXX
24 prom_startcpu(int cpunode, struct linux_prom_registers *ctable_reg, int ctx, char *pc)
29 spin_lock_irqsave(&prom_lock, flags);
37 ret = (*(romvec->v3_cpustart))(cpunode, (int) ctable_reg, ctx, pc);
41 spin_unlock_irqrestore(&prom_lock, flags);