- /* 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/config.h>
- #include <linux/threads.h>
- #include <linux/cache.h>
- #include <asm/asi.h>
- #include <asm/starfire.h>
- #include <asm/spitfire.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[64];
- #endif /* !(__ASSEMBLY__) */
- #ifdef CONFIG_SMP
- #ifndef __ASSEMBLY__
- /* Per processor Sparc parameters we need. */
- /* Keep this a multiple of 64-bytes for cache reasons. */
- typedef struct {
- /* Dcache line 1 */
- unsigned int __pad0; /* bh_count moved to irq_stat for consistency. KAO */
- unsigned int multiplier;
- unsigned int counter;
- unsigned int idle_volume;
- unsigned long clock_tick; /* %tick's per second */
- unsigned long udelay_val;
- /* Dcache line 2 */
- unsigned int pgcache_size;
- unsigned int pgdcache_size;
- unsigned long *pte_cache[2];
- unsigned long *pgd_cache;
- /* Dcache lines 3 and 4 */
- unsigned int irq_worklists[16];
- } ____cacheline_aligned cpuinfo_sparc;
- extern cpuinfo_sparc cpu_data[NR_CPUS];
- /*
- * Private routines/data
- */
- extern unsigned char boot_cpu_id;
- extern unsigned long cpu_present_map;
- #define cpu_online_map 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 cpu_number_map(int cpu)
- {
- return __cpu_number_map[cpu];
- }
- extern __inline__ int hard_smp_processor_id(void)
- {
- if (tlb_type == cheetah || tlb_type == cheetah_plus) {
- unsigned long safari_config;
- __asm__ __volatile__("ldxa [%%g0] %1, %0"
- : "=r" (safari_config)
- : "i" (ASI_SAFARI_CONFIG));
- return ((safari_config >> 17) & 0x3ff);
- } else if (this_is_starfire != 0) {
- return starfire_hard_smp_processor_id();
- } else {
- 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)
- /* This needn't do anything as we do not sleep the cpu
- * inside of the idler task, so an interrupt is not needed
- * to get a clean fast response.
- *
- * Addendum: We do want it to do something for the signal
- * delivery case, we detect that by just seeing
- * if we are trying to send this to an idler or not.
- */
- extern __inline__ void smp_send_reschedule(int cpu)
- {
- extern void smp_receive_signal(int);
- if(cpu_data[cpu].idle_volume == 0)
- smp_receive_signal(cpu);
- }
- /* This is a nop as well because we capture all other cpus
- * anyways when making the PROM active.
- */
- extern __inline__ void smp_send_stop(void) { }
- #endif /* !(__ASSEMBLY__) */
- #define PROC_CHANGE_PENALTY 20
- #endif /* !(CONFIG_SMP) */
- #define NO_PROC_ID 0xFF
- #endif /* !(_SPARC64_SMP_H) */