/* smp.h: Sparc specific SMP stuff.
*
* Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
*/
#ifndef _SPARC_SMP_H
#define _SPARC_SMP_H
#include <linux/threads.h>
#include <asm/head.h>
#include <asm/btfixup.h>
#ifndef __ASSEMBLY__
#include <linux/cpumask.h>
#endif /* __ASSEMBLY__ */
#ifdef CONFIG_SMP
#ifndef __ASSEMBLY__
#include <asm/ptrace.h>
#include <asm/asi.h>
#include <asm/atomic.h>
/*
* Private routines/data
*/
extern unsigned char boot_cpu_id;
typedef void (*smpfunc_t)(unsigned long, unsigned long, unsigned long,
unsigned long, unsigned long);
/*
* General functions that each host system must provide.
*/
void sun4m_init_smp(void);
void sun4d_init_smp(void);
void smp_callin(void);
void smp_boot_cpus(void);
void smp_store_cpu_info(int);
struct seq_file;
void smp_bogo(struct seq_file *);
void smp_info(struct seq_file *);
BTFIXUPDEF_CALL(void, smp_cross_call, smpfunc_t, cpumask_t, unsigned long, unsigned long, unsigned long, unsigned long)
BTFIXUPDEF_CALL(int, __hard_smp_processor_id, void)
BTFIXUPDEF_BLACKBOX(hard_smp_processor_id)
BTFIXUPDEF_BLACKBOX(load_current)
#define smp_cross_call(func,mask,arg1,arg2,arg3,arg4) BTFIXUP_CALL(smp_cross_call)(func,mask,arg1,arg2,arg3,arg4)
static inline void xc0(smpfunc_t func) { smp_cross_call(func, cpu_online_map, 0, 0, 0, 0); }
static inline void xc1(smpfunc_t func, unsigned long arg1)
{ smp_cross_call(func, cpu_online_map, arg1, 0, 0, 0); }
static inline void xc2(smpfunc_t func, unsigned long arg1, unsigned long arg2)
{ smp_cross_call(func, cpu_online_map, arg1, arg2, 0, 0); }
static inline void xc3(smpfunc_t func, unsigned long arg1, unsigned long arg2,
unsigned long arg3)
{ smp_cross_call(func, cpu_online_map, arg1, arg2, arg3, 0); }
static inline void xc4(smpfunc_t func, unsigned long arg1, unsigned long arg2,
unsigned long arg3, unsigned long arg4)
{ smp_cross_call(func, cpu_online_map, arg1, arg2, arg3, arg4); }
static inline int smp_call_function(void (*func)(void *info), void *info, int wait)
{
xc1((smpfunc_t)func, (unsigned long)info);
return 0;
}
static inline int smp_call_function_single(int cpuid, void (*func) (void *info),
void *info, int wait)
{
smp_cross_call((smpfunc_t)func, cpumask_of_cpu(cpuid),
(unsigned long) info, 0, 0, 0);
return 0;
}
static inline int cpu_logical_map(int cpu)
{
return cpu;
}
static inline int hard_smp4m_processor_id(void)
{
int cpuid;
__asm__ __volatile__("rd %%tbr, %0\n\t"
"srl %0, 12, %0\n\t"
"and %0, 3, %0\n\t" :
"=&r" (cpuid));
return cpuid;
}
static inline int hard_smp4d_processor_id(void)
{
int cpuid;
__asm__ __volatile__("lda [%%g0] %1, %0\n\t" :
"=&r" (cpuid) : "i" (ASI_M_VIKING_TMP1));
return cpuid;
}
#ifndef MODULE
static inline int hard_smp_processor_id(void)
{
int cpuid;
/* Black box - sun4m
__asm__ __volatile__("rd %%tbr, %0\n\t"
"srl %0, 12, %0\n\t"
"and %0, 3, %0\n\t" :
"=&r" (cpuid));
- sun4d
__asm__ __volatile__("lda [%g0] ASI_M_VIKING_TMP1, %0\n\t"
"nop; nop" :
"=&r" (cpuid));
See btfixup.h and btfixupprep.c to understand how a blackbox works.
*/
__asm__ __volatile__("sethi %%hi(___b_hard_smp_processor_id), %0\n\t"
"sethi %%hi(boot_cpu_id), %0\n\t"
"ldub [%0 + %%lo(boot_cpu_id)], %0\n\t" :
"=&r" (cpuid));
return cpuid;
}
#else
static inline int hard_smp_processor_id(void)
{
int cpuid;
__asm__ __volatile__("mov %%o7, %%g1\n\t"
"call ___f___hard_smp_processor_id\n\t"
" nop\n\t"
"mov %%g2, %0\n\t" : "=r"(cpuid) : : "g1", "g2");
return cpuid;
}
#endif
#define raw_smp_processor_id() (current_thread_info()->cpu)
#define prof_multiplier(__cpu) cpu_data(__cpu).multiplier
#define prof_counter(__cpu) cpu_data(__cpu).counter
void smp_setup_cpu_possible_map(void);
#endif /* !(__ASSEMBLY__) */
/* Sparc specific messages. */
#define MSG_CROSS_CALL 0x0005 /* run func on cpus */
/* Empirical PROM processor mailbox constants. If the per-cpu mailbox
* contains something other than one of these then the ipi is from
* Linux's active_kernel_processor. This facility exists so that
* the boot monitor can capture all the other cpus when one catches
* a watchdog reset or the user enters the monitor using L1-A keys.
*/
#define MBOX_STOPCPU 0xFB
#define MBOX_IDLECPU 0xFC
#define MBOX_IDLECPU2 0xFD
#define MBOX_STOPCPU2 0xFE
#else /* SMP */
#define hard_smp_processor_id() 0
#define smp_setup_cpu_possible_map() do { } while (0)
#endif /* !(SMP) */
#endif /* !(_SPARC_SMP_H) */
