2f4dfe206a
With the advent of kdump, the assumption that the boot CPU when booting an UP
kernel is always the CPU with a particular hardware ID (often 0) (usually
referred to as BSP on some architectures) is not valid anymore. The reason
being that the dump capture kernel boots on the crashed CPU (the CPU that
invoked crash_kexec), which may be or may not be that particular CPU.
Move definition of hard_smp_processor_id for the UP case to
architecture-specific code ("asm/smp.h") where it belongs, so that each
architecture can provide its own implementation.
Signed-off-by: Fernando Luis Vazquez Cao <fernando@oss.ntt.co.jp>
Cc: "Luck, Tony" <tony.luck@intel.com>
Acked-by: Andi Kleen <ak@suse.de>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Vivek Goyal <vgoyal@in.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
175 lines
4.8 KiB
C
175 lines
4.8 KiB
C
/* smp.h: Sparc specific SMP stuff.
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*
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* Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
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*/
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#ifndef _SPARC_SMP_H
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#define _SPARC_SMP_H
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#include <linux/threads.h>
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#include <asm/head.h>
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#include <asm/btfixup.h>
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#ifndef __ASSEMBLY__
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#include <linux/cpumask.h>
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#endif /* __ASSEMBLY__ */
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#ifdef CONFIG_SMP
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#ifndef __ASSEMBLY__
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#include <asm/ptrace.h>
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#include <asm/asi.h>
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#include <asm/atomic.h>
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/*
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* Private routines/data
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*/
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extern unsigned char boot_cpu_id;
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extern cpumask_t phys_cpu_present_map;
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#define cpu_possible_map phys_cpu_present_map
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typedef void (*smpfunc_t)(unsigned long, unsigned long, unsigned long,
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unsigned long, unsigned long);
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/*
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* General functions that each host system must provide.
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*/
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void sun4m_init_smp(void);
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void sun4d_init_smp(void);
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void smp_callin(void);
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void smp_boot_cpus(void);
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void smp_store_cpu_info(int);
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struct seq_file;
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void smp_bogo(struct seq_file *);
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void smp_info(struct seq_file *);
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BTFIXUPDEF_CALL(void, smp_cross_call, smpfunc_t, unsigned long, unsigned long, unsigned long, unsigned long, unsigned long)
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BTFIXUPDEF_CALL(void, smp_message_pass, int, int, unsigned long, int)
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BTFIXUPDEF_CALL(int, __hard_smp_processor_id, void)
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BTFIXUPDEF_BLACKBOX(hard_smp_processor_id)
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BTFIXUPDEF_BLACKBOX(load_current)
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#define smp_cross_call(func,arg1,arg2,arg3,arg4,arg5) BTFIXUP_CALL(smp_cross_call)(func,arg1,arg2,arg3,arg4,arg5)
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#define smp_message_pass(target,msg,data,wait) BTFIXUP_CALL(smp_message_pass)(target,msg,data,wait)
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static inline void xc0(smpfunc_t func) { smp_cross_call(func, 0, 0, 0, 0, 0); }
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static inline void xc1(smpfunc_t func, unsigned long arg1)
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{ smp_cross_call(func, arg1, 0, 0, 0, 0); }
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static inline void xc2(smpfunc_t func, unsigned long arg1, unsigned long arg2)
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{ smp_cross_call(func, arg1, arg2, 0, 0, 0); }
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static inline void xc3(smpfunc_t func, unsigned long arg1, unsigned long arg2,
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unsigned long arg3)
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{ smp_cross_call(func, arg1, arg2, arg3, 0, 0); }
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static inline void xc4(smpfunc_t func, unsigned long arg1, unsigned long arg2,
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unsigned long arg3, unsigned long arg4)
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{ smp_cross_call(func, arg1, arg2, arg3, arg4, 0); }
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static inline void xc5(smpfunc_t func, unsigned long arg1, unsigned long arg2,
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unsigned long arg3, unsigned long arg4, unsigned long arg5)
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{ smp_cross_call(func, arg1, arg2, arg3, arg4, arg5); }
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static inline int smp_call_function(void (*func)(void *info), void *info, int nonatomic, int wait)
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{
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xc1((smpfunc_t)func, (unsigned long)info);
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return 0;
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}
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static inline int cpu_logical_map(int cpu)
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{
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return cpu;
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}
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static inline int hard_smp4m_processor_id(void)
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{
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int cpuid;
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__asm__ __volatile__("rd %%tbr, %0\n\t"
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"srl %0, 12, %0\n\t"
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"and %0, 3, %0\n\t" :
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"=&r" (cpuid));
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return cpuid;
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}
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static inline int hard_smp4d_processor_id(void)
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{
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int cpuid;
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__asm__ __volatile__("lda [%%g0] %1, %0\n\t" :
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"=&r" (cpuid) : "i" (ASI_M_VIKING_TMP1));
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return cpuid;
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}
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#ifndef MODULE
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static inline int hard_smp_processor_id(void)
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{
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int cpuid;
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/* Black box - sun4m
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__asm__ __volatile__("rd %%tbr, %0\n\t"
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"srl %0, 12, %0\n\t"
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"and %0, 3, %0\n\t" :
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"=&r" (cpuid));
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- sun4d
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__asm__ __volatile__("lda [%g0] ASI_M_VIKING_TMP1, %0\n\t"
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"nop; nop" :
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"=&r" (cpuid));
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See btfixup.h and btfixupprep.c to understand how a blackbox works.
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*/
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__asm__ __volatile__("sethi %%hi(___b_hard_smp_processor_id), %0\n\t"
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"sethi %%hi(boot_cpu_id), %0\n\t"
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"ldub [%0 + %%lo(boot_cpu_id)], %0\n\t" :
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"=&r" (cpuid));
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return cpuid;
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}
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#else
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static inline int hard_smp_processor_id(void)
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{
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int cpuid;
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__asm__ __volatile__("mov %%o7, %%g1\n\t"
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"call ___f___hard_smp_processor_id\n\t"
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" nop\n\t"
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"mov %%g2, %0\n\t" : "=r"(cpuid) : : "g1", "g2");
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return cpuid;
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}
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#endif
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#define raw_smp_processor_id() (current_thread_info()->cpu)
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#define prof_multiplier(__cpu) cpu_data(__cpu).multiplier
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#define prof_counter(__cpu) cpu_data(__cpu).counter
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void smp_setup_cpu_possible_map(void);
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#endif /* !(__ASSEMBLY__) */
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/* Sparc specific messages. */
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#define MSG_CROSS_CALL 0x0005 /* run func on cpus */
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/* Empirical PROM processor mailbox constants. If the per-cpu mailbox
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* contains something other than one of these then the ipi is from
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* Linux's active_kernel_processor. This facility exists so that
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* the boot monitor can capture all the other cpus when one catches
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* a watchdog reset or the user enters the monitor using L1-A keys.
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*/
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#define MBOX_STOPCPU 0xFB
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#define MBOX_IDLECPU 0xFC
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#define MBOX_IDLECPU2 0xFD
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#define MBOX_STOPCPU2 0xFE
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#else /* SMP */
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#define hard_smp_processor_id() 0
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#define smp_setup_cpu_possible_map() do { } while (0)
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#endif /* !(SMP) */
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#define NO_PROC_ID 0xFF
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#endif /* !(_SPARC_SMP_H) */
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