diff options
Diffstat (limited to 'arch/sparc/prom/mp.c')
| -rw-r--r-- | arch/sparc/prom/mp.c | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/arch/sparc/prom/mp.c b/arch/sparc/prom/mp.c new file mode 100644 index 0000000000..67cf0e957e --- /dev/null +++ b/arch/sparc/prom/mp.c @@ -0,0 +1,44 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * 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; +} |