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/* smp.h: Sparc64 specific SMP stuff.
*
* Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
*/
#ifndef _SPARC64_SMP_H
#define _SPARC64_SMP_H
#include <linux/tasks.h>
#include <asm/asi.h>
#ifndef __ASSEMBLY__
/* PROM provided per-processor information we need
* to start them all up.
*/
struct prom_cpuinfo {
int prom_node;
int mid;
};
extern int linux_num_cpus; /* number of CPUs probed */
extern struct prom_cpuinfo linux_cpus[NR_CPUS];
#endif /* !(__ASSEMBLY__) */
#ifdef __SMP__
#ifndef __ASSEMBLY__
/* Per processor Sparc parameters we need. */
/* Keep this a multiple of 64-bytes for cache reasons. */
struct cpuinfo_sparc {
/* Dcache line 1 */
unsigned long irq_count;
unsigned int multiplier;
unsigned int counter;
unsigned long pgcache_size;
unsigned long pgdcache_size;
/* Dcache line 2 */
unsigned long *pgd_cache;
unsigned long *pte_cache;
unsigned long udelay_val;
unsigned long dummy;
};
extern struct cpuinfo_sparc cpu_data[NR_CPUS];
/*
* Private routines/data
*/
extern unsigned char boot_cpu_id;
extern unsigned long cpu_present_map;
/*
* General functions that each host system must provide.
*/
extern void smp_callin(void);
extern void smp_boot_cpus(void);
extern void smp_store_cpu_info(int id);
extern __volatile__ int cpu_number_map[NR_CPUS];
extern __volatile__ int __cpu_logical_map[NR_CPUS];
extern __inline__ int cpu_logical_map(int cpu)
{
return __cpu_logical_map[cpu];
}
extern __inline__ int hard_smp_processor_id(void)
{
unsigned long upaconfig;
__asm__ __volatile__("ldxa [%%g0] %1, %0"
: "=r" (upaconfig)
: "i" (ASI_UPA_CONFIG));
return ((upaconfig >> 17) & 0x1f);
}
#define smp_processor_id() (current->processor)
extern void smp_message_pass(int target, int msg, unsigned long data, int wait);
/* As idle task checks need_resched in a tight loop, it is not necessary to
wake it up. -jj */
#define smp_send_reschedule(cpu) do {} while (0)
#endif /* !(__ASSEMBLY__) */
#define PROC_CHANGE_PENALTY 20
#else /* !(__SMP__) */
#define NO_PROC_ID 0xFF
#endif /* !(_SPARC64_SMP_H) */
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