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 12 static __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 28 struct 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 41 extern 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 46 extern int smp_num_cpus; 47 48 extern void arch_send_call_function_single_ipi(int cpu); 49 extern 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