/* * smp.h: PowerPC-specific SMP code. * * Original was a copy of sparc smp.h. Now heavily modified * for PPC. * * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu) * Copyright (C) 1996-2001 Cort Dougan <cort@fsmlabs.com> * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version * 2 of the License, or (at your option) any later version. */ #ifndef _ASM_POWERPC_SMP_H #define _ASM_POWERPC_SMP_H #ifdef __KERNEL__ #include <linux/threads.h> #include <linux/cpumask.h> #include <linux/kernel.h> #ifndef __ASSEMBLY__ #ifdef CONFIG_PPC64 #include <asm/paca.h> #endif extern int boot_cpuid; extern void cpu_die(void); #ifdef CONFIG_SMP extern void smp_send_debugger_break(int cpu); extern void smp_message_recv(int); #ifdef CONFIG_HOTPLUG_CPU extern void fixup_irqs(cpumask_t map); int generic_cpu_disable(void); int generic_cpu_enable(unsigned int cpu); void generic_cpu_die(unsigned int cpu); void generic_mach_cpu_die(void); #endif #ifdef CONFIG_PPC64 #define raw_smp_processor_id() (get_paca()->paca_index) #define hard_smp_processor_id() (get_paca()->hw_cpu_id) #else /* 32-bit */ extern int smp_hw_index[]; #define raw_smp_processor_id() (current_thread_info()->cpu) #define hard_smp_processor_id() (smp_hw_index[smp_processor_id()]) #define get_hard_smp_processor_id(cpu) (smp_hw_index[(cpu)]) #define set_hard_smp_processor_id(cpu, phys)\ (smp_hw_index[(cpu)] = (phys)) #endif extern cpumask_t cpu_sibling_map[NR_CPUS]; /* Since OpenPIC has only 4 IPIs, we use slightly different message numbers. * * Make sure this matches openpic_request_IPIs in open_pic.c, or what shows up * in /proc/interrupts will be wrong!!! --Troy */ #define PPC_MSG_CALL_FUNCTION 0 #define PPC_MSG_RESCHEDULE 1 /* This is unused now */ #if 0 #define PPC_MSG_MIGRATE_TASK 2 #endif #define PPC_MSG_DEBUGGER_BREAK 3 void smp_init_iSeries(void); void smp_init_pSeries(void); void smp_init_cell(void); void smp_setup_cpu_maps(void); extern int __cpu_disable(void); extern void __cpu_die(unsigned int cpu); #else /* for UP */ #define smp_setup_cpu_maps() #endif /* CONFIG_SMP */ #ifdef CONFIG_PPC64 #define get_hard_smp_processor_id(CPU) (paca[(CPU)].hw_cpu_id) #define set_hard_smp_processor_id(CPU, VAL) \ do { (paca[(CPU)].hw_cpu_id = (VAL)); } while (0) extern void smp_release_cpus(void); #else /* 32-bit */ #ifndef CONFIG_SMP extern int boot_cpuid_phys; #define get_hard_smp_processor_id(cpu) boot_cpuid_phys #define set_hard_smp_processor_id(cpu, phys) #endif #endif extern int smt_enabled_at_boot; extern int smp_mpic_probe(void); extern void smp_mpic_setup_cpu(int cpu); extern void smp_generic_kick_cpu(int nr); extern void smp_generic_give_timebase(void); extern void smp_generic_take_timebase(void); extern struct smp_ops_t *smp_ops; #endif /* __ASSEMBLY__ */ #endif /* __KERNEL__ */ #endif /* _ASM_POWERPC_SMP_H) */