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d5a7430ddc
Convert cpu_sibling_map from a static array sized by NR_CPUS to a per_cpu variable. This saves sizeof(cpumask_t) * NR unused cpus. Access is mostly from startup and CPU HOTPLUG functions. Signed-off-by: Mike Travis <travis@sgi.com> Cc: Andi Kleen <ak@suse.de> Cc: Christoph Lameter <clameter@sgi.com> Cc: "Siddha, Suresh B" <suresh.b.siddha@intel.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Paul Mackerras <paulus@samba.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: "Luck, Tony" <tony.luck@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
124 lines
3.1 KiB
C
124 lines
3.1 KiB
C
/*
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* smp.h: PowerPC-specific SMP code.
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*
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* Original was a copy of sparc smp.h. Now heavily modified
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* for PPC.
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*
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* Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
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* Copyright (C) 1996-2001 Cort Dougan <cort@fsmlabs.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#ifndef _ASM_POWERPC_SMP_H
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#define _ASM_POWERPC_SMP_H
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#ifdef __KERNEL__
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#include <linux/threads.h>
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#include <linux/cpumask.h>
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#include <linux/kernel.h>
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#ifndef __ASSEMBLY__
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#ifdef CONFIG_PPC64
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#include <asm/paca.h>
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#endif
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#include <asm/percpu.h>
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extern int boot_cpuid;
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extern void cpu_die(void);
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#ifdef CONFIG_SMP
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extern void smp_send_debugger_break(int cpu);
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extern void smp_message_recv(int);
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#ifdef CONFIG_HOTPLUG_CPU
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extern void fixup_irqs(cpumask_t map);
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int generic_cpu_disable(void);
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int generic_cpu_enable(unsigned int cpu);
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void generic_cpu_die(unsigned int cpu);
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void generic_mach_cpu_die(void);
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#endif
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#ifdef CONFIG_PPC64
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#define raw_smp_processor_id() (local_paca->paca_index)
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#define hard_smp_processor_id() (get_paca()->hw_cpu_id)
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#else
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/* 32-bit */
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extern int smp_hw_index[];
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#define raw_smp_processor_id() (current_thread_info()->cpu)
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#define hard_smp_processor_id() (smp_hw_index[smp_processor_id()])
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#define get_hard_smp_processor_id(cpu) (smp_hw_index[(cpu)])
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#define set_hard_smp_processor_id(cpu, phys)\
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(smp_hw_index[(cpu)] = (phys))
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#endif
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DECLARE_PER_CPU(cpumask_t, cpu_sibling_map);
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/* Since OpenPIC has only 4 IPIs, we use slightly different message numbers.
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*
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* Make sure this matches openpic_request_IPIs in open_pic.c, or what shows up
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* in /proc/interrupts will be wrong!!! --Troy */
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#define PPC_MSG_CALL_FUNCTION 0
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#define PPC_MSG_RESCHEDULE 1
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/* This is unused now */
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#if 0
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#define PPC_MSG_MIGRATE_TASK 2
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#endif
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#define PPC_MSG_DEBUGGER_BREAK 3
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void smp_init_iSeries(void);
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void smp_init_pSeries(void);
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void smp_init_cell(void);
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void smp_init_celleb(void);
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void smp_setup_cpu_maps(void);
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void smp_setup_cpu_sibling_map(void);
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extern int __cpu_disable(void);
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extern void __cpu_die(unsigned int cpu);
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#else
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/* for UP */
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#define hard_smp_processor_id() 0
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#define smp_setup_cpu_maps()
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#endif /* CONFIG_SMP */
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#ifdef CONFIG_PPC64
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#define get_hard_smp_processor_id(CPU) (paca[(CPU)].hw_cpu_id)
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#define set_hard_smp_processor_id(CPU, VAL) \
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do { (paca[(CPU)].hw_cpu_id = (VAL)); } while (0)
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extern void smp_release_cpus(void);
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#else
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/* 32-bit */
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#ifndef CONFIG_SMP
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extern int boot_cpuid_phys;
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#define get_hard_smp_processor_id(cpu) boot_cpuid_phys
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#define set_hard_smp_processor_id(cpu, phys)
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#endif
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#endif
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extern int smt_enabled_at_boot;
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extern int smp_mpic_probe(void);
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extern void smp_mpic_setup_cpu(int cpu);
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extern void smp_generic_kick_cpu(int nr);
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extern void smp_generic_give_timebase(void);
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extern void smp_generic_take_timebase(void);
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extern struct smp_ops_t *smp_ops;
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#endif /* __ASSEMBLY__ */
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#endif /* __KERNEL__ */
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#endif /* _ASM_POWERPC_SMP_H) */
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