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Linux/arch/sparc/prom/mp.c

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  1 /*
  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;
 38         }
 39         restore_current();
 40         spin_unlock_irqrestore(&prom_lock, flags);
 41 
 42         return ret;
 43 }
 44 

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