[mirror_ubuntu-artful-kernel.git] / arch / sparc / prom / mp.c

/*
 * mp.c:  OpenBoot Prom Multiprocessor support routines.  Don't call
 *        these on a UP or else you will halt and catch fire. ;)
 *
 * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
 */

#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/sched.h>

#include <asm/openprom.h>
#include <asm/oplib.h>

extern void restore_current(void);

/* Start cpu with prom-tree node 'cpunode' using context described
 * by 'ctable_reg' in context 'ctx' at program counter 'pc'.
 *
 * XXX Have to look into what the return values mean. XXX
 */
int
prom_startcpu(int cpunode, struct linux_prom_registers *ctable_reg, int ctx, char *pc)
{
	int ret;
	unsigned long flags;

	spin_lock_irqsave(&prom_lock, flags);
	switch(prom_vers) {
	case PROM_V0:
	case PROM_V2:
	default:
		ret = -1;
		break;
	case PROM_V3:
		ret = (*(romvec->v3_cpustart))(cpunode, (int) ctable_reg, ctx, pc);
		break;
	}
	restore_current();
	spin_unlock_irqrestore(&prom_lock, flags);

	return ret;
}
Commit	Line	Data
88278ca2	1	/*
1da177e4 LT	2	* 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
	15	extern 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	*/
	22	int
	23	prom_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;
6cb79b3f	38	}
1da177e4 LT	39	restore_current();
	40	spin_unlock_irqrestore(&prom_lock, flags);
	41
	42	return ret;
	43	}