1/* SPDX-License-Identifier: GPL-2.0 */ 2#ifndef __ASM_SMP_H 3#define __ASM_SMP_H 4 5#include <linux/threads.h> 6#include <linux/cpumask.h> 7#include <linux/bitops.h> 8#include <asm/pal.h> 9 10/* HACK: Cabrio WHAMI return value is bogus if more than 8 bits used.. :-( */ 11 12static __inline__ unsigned char 13__hard_smp_processor_id(void) 14{ 15 register unsigned char __r0 __asm__("$0"); 16 __asm__ __volatile__( 17 "call_pal %1 #whami" 18 : "=r"(__r0) 19 :"i" (PAL_whami) 20 : "$1", "$22", "$23", "$24", "$25"); 21 return __r0; 22} 23 24#ifdef CONFIG_SMP 25 26#include <asm/irq.h> 27 28struct cpuinfo_alpha { 29 unsigned long loops_per_jiffy; 30 unsigned long last_asn; 31 int need_new_asn; 32 int asn_lock; 33 unsigned long ipi_count; 34 unsigned long prof_multiplier; 35 unsigned long prof_counter; 36 unsigned char mcheck_expected; 37 unsigned char mcheck_taken; 38 unsigned char mcheck_extra; 39} __attribute__((aligned(64))); 40 41extern struct cpuinfo_alpha cpu_data[NR_CPUS]; 42 43#define hard_smp_processor_id() __hard_smp_processor_id() 44#define raw_smp_processor_id() (current_thread_info()->cpu) 45 46extern int smp_num_cpus; 47 48extern void arch_send_call_function_single_ipi(int cpu); 49extern void arch_send_call_function_ipi_mask(const struct cpumask *mask); 50 51#else /* CONFIG_SMP */ 52 53#define hard_smp_processor_id() 0 54#define smp_call_function_on_cpu(func,info,wait,cpu) ({ 0; }) 55 56#endif /* CONFIG_SMP */ 57 58#define NO_PROC_ID (-1) 59 60#endif 61