1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 */ 2*4882a593Smuzhiyun /* 3*4882a593Smuzhiyun * SMP Support 4*4882a593Smuzhiyun * 5*4882a593Smuzhiyun * Copyright (C) 1999 VA Linux Systems 6*4882a593Smuzhiyun * Copyright (C) 1999 Walt Drummond <drummond@valinux.com> 7*4882a593Smuzhiyun * (c) Copyright 2001-2003, 2005 Hewlett-Packard Development Company, L.P. 8*4882a593Smuzhiyun * David Mosberger-Tang <davidm@hpl.hp.com> 9*4882a593Smuzhiyun * Bjorn Helgaas <bjorn.helgaas@hp.com> 10*4882a593Smuzhiyun */ 11*4882a593Smuzhiyun #ifndef _ASM_IA64_SMP_H 12*4882a593Smuzhiyun #define _ASM_IA64_SMP_H 13*4882a593Smuzhiyun 14*4882a593Smuzhiyun #include <linux/init.h> 15*4882a593Smuzhiyun #include <linux/threads.h> 16*4882a593Smuzhiyun #include <linux/kernel.h> 17*4882a593Smuzhiyun #include <linux/cpumask.h> 18*4882a593Smuzhiyun #include <linux/bitops.h> 19*4882a593Smuzhiyun #include <linux/irqreturn.h> 20*4882a593Smuzhiyun 21*4882a593Smuzhiyun #include <asm/param.h> 22*4882a593Smuzhiyun #include <asm/processor.h> 23*4882a593Smuzhiyun #include <asm/ptrace.h> 24*4882a593Smuzhiyun 25*4882a593Smuzhiyun static inline unsigned int ia64_get_lid(void)26*4882a593Smuzhiyunia64_get_lid (void) 27*4882a593Smuzhiyun { 28*4882a593Smuzhiyun union { 29*4882a593Smuzhiyun struct { 30*4882a593Smuzhiyun unsigned long reserved : 16; 31*4882a593Smuzhiyun unsigned long eid : 8; 32*4882a593Smuzhiyun unsigned long id : 8; 33*4882a593Smuzhiyun unsigned long ignored : 32; 34*4882a593Smuzhiyun } f; 35*4882a593Smuzhiyun unsigned long bits; 36*4882a593Smuzhiyun } lid; 37*4882a593Smuzhiyun 38*4882a593Smuzhiyun lid.bits = ia64_getreg(_IA64_REG_CR_LID); 39*4882a593Smuzhiyun return lid.f.id << 8 | lid.f.eid; 40*4882a593Smuzhiyun } 41*4882a593Smuzhiyun 42*4882a593Smuzhiyun #define hard_smp_processor_id() ia64_get_lid() 43*4882a593Smuzhiyun 44*4882a593Smuzhiyun #ifdef CONFIG_SMP 45*4882a593Smuzhiyun 46*4882a593Smuzhiyun #define raw_smp_processor_id() (current_thread_info()->cpu) 47*4882a593Smuzhiyun 48*4882a593Smuzhiyun extern struct smp_boot_data { 49*4882a593Smuzhiyun int cpu_count; 50*4882a593Smuzhiyun int cpu_phys_id[NR_CPUS]; 51*4882a593Smuzhiyun } smp_boot_data __initdata; 52*4882a593Smuzhiyun 53*4882a593Smuzhiyun extern char no_int_routing; 54*4882a593Smuzhiyun 55*4882a593Smuzhiyun extern cpumask_t cpu_core_map[NR_CPUS]; 56*4882a593Smuzhiyun DECLARE_PER_CPU_SHARED_ALIGNED(cpumask_t, cpu_sibling_map); 57*4882a593Smuzhiyun extern int smp_num_siblings; 58*4882a593Smuzhiyun extern void __iomem *ipi_base_addr; 59*4882a593Smuzhiyun 60*4882a593Smuzhiyun extern volatile int ia64_cpu_to_sapicid[]; 61*4882a593Smuzhiyun #define cpu_physical_id(i) ia64_cpu_to_sapicid[i] 62*4882a593Smuzhiyun 63*4882a593Smuzhiyun extern unsigned long ap_wakeup_vector; 64*4882a593Smuzhiyun 65*4882a593Smuzhiyun /* 66*4882a593Smuzhiyun * Function to map hard smp processor id to logical id. Slow, so don't use this in 67*4882a593Smuzhiyun * performance-critical code. 68*4882a593Smuzhiyun */ 69*4882a593Smuzhiyun static inline int cpu_logical_id(int cpuid)70*4882a593Smuzhiyuncpu_logical_id (int cpuid) 71*4882a593Smuzhiyun { 72*4882a593Smuzhiyun int i; 73*4882a593Smuzhiyun 74*4882a593Smuzhiyun for (i = 0; i < NR_CPUS; ++i) 75*4882a593Smuzhiyun if (cpu_physical_id(i) == cpuid) 76*4882a593Smuzhiyun break; 77*4882a593Smuzhiyun return i; 78*4882a593Smuzhiyun } 79*4882a593Smuzhiyun 80*4882a593Smuzhiyun /* Upping and downing of CPUs */ 81*4882a593Smuzhiyun extern int __cpu_disable (void); 82*4882a593Smuzhiyun extern void __cpu_die (unsigned int cpu); 83*4882a593Smuzhiyun extern void cpu_die (void) __attribute__ ((noreturn)); 84*4882a593Smuzhiyun extern void __init smp_build_cpu_map(void); 85*4882a593Smuzhiyun 86*4882a593Smuzhiyun extern void __init init_smp_config (void); 87*4882a593Smuzhiyun extern void smp_do_timer (struct pt_regs *regs); 88*4882a593Smuzhiyun 89*4882a593Smuzhiyun extern irqreturn_t handle_IPI(int irq, void *dev_id); 90*4882a593Smuzhiyun extern void smp_send_reschedule (int cpu); 91*4882a593Smuzhiyun extern void identify_siblings (struct cpuinfo_ia64 *); 92*4882a593Smuzhiyun extern int is_multithreading_enabled(void); 93*4882a593Smuzhiyun 94*4882a593Smuzhiyun extern void arch_send_call_function_single_ipi(int cpu); 95*4882a593Smuzhiyun extern void arch_send_call_function_ipi_mask(const struct cpumask *mask); 96*4882a593Smuzhiyun 97*4882a593Smuzhiyun #else /* CONFIG_SMP */ 98*4882a593Smuzhiyun 99*4882a593Smuzhiyun #define cpu_logical_id(i) 0 100*4882a593Smuzhiyun #define cpu_physical_id(i) ia64_get_lid() 101*4882a593Smuzhiyun 102*4882a593Smuzhiyun #endif /* CONFIG_SMP */ 103*4882a593Smuzhiyun #endif /* _ASM_IA64_SMP_H */ 104