blob: 0da8256cf76f286a6e2aa2d4c60e219e18a1e911 [file] [log] [blame]
Adrian Bunk88278ca2008-05-19 16:53:02 -07001/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07002 * mp.c: OpenBoot Prom Multiprocessor support routines. Don't call
3 * these on a UP or else you will halt and catch fire. ;)
4 *
5 * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
6 */
7
8#include <linux/types.h>
9#include <linux/kernel.h>
10#include <linux/sched.h>
11
12#include <asm/openprom.h>
13#include <asm/oplib.h>
14
15extern void restore_current(void);
16
17/* Start cpu with prom-tree node 'cpunode' using context described
18 * by 'ctable_reg' in context 'ctx' at program counter 'pc'.
19 *
20 * XXX Have to look into what the return values mean. XXX
21 */
22int
23prom_startcpu(int cpunode, struct linux_prom_registers *ctable_reg, int ctx, char *pc)
24{
25 int ret;
26 unsigned long flags;
27
28 spin_lock_irqsave(&prom_lock, flags);
29 switch(prom_vers) {
30 case PROM_V0:
31 case PROM_V2:
32 default:
33 ret = -1;
34 break;
35 case PROM_V3:
36 ret = (*(romvec->v3_cpustart))(cpunode, (int) ctable_reg, ctx, pc);
37 break;
Joe Perches6cb79b32011-06-03 14:45:23 +000038 }
Linus Torvalds1da177e2005-04-16 15:20:36 -070039 restore_current();
40 spin_unlock_irqrestore(&prom_lock, flags);
41
42 return ret;
43}