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44 lines
1.0 KiB
44 lines
1.0 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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* mp.c: OpenBoot Prom Multiprocessor support routines. Don't call |
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* these on a UP or else you will halt and catch fire. ;) |
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* |
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* Copyright (C) 1995 David S. Miller ([email protected]) |
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*/ |
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#include <linux/types.h> |
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#include <linux/kernel.h> |
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#include <linux/sched.h> |
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#include <asm/openprom.h> |
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#include <asm/oplib.h> |
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extern void restore_current(void); |
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/* Start cpu with prom-tree node 'cpunode' using context described |
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* by 'ctable_reg' in context 'ctx' at program counter 'pc'. |
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* |
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* XXX Have to look into what the return values mean. XXX |
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*/ |
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int |
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prom_startcpu(int cpunode, struct linux_prom_registers *ctable_reg, int ctx, char *pc) |
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{ |
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int ret; |
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unsigned long flags; |
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spin_lock_irqsave(&prom_lock, flags); |
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switch(prom_vers) { |
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case PROM_V0: |
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case PROM_V2: |
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default: |
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ret = -1; |
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break; |
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case PROM_V3: |
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ret = (*(romvec->v3_cpustart))(cpunode, (int) ctable_reg, ctx, pc); |
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break; |
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} |
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restore_current(); |
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spin_unlock_irqrestore(&prom_lock, flags); |
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return ret; |
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}
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