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103 lines
2.5 KiB
103 lines
2.5 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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/* |
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* SMP Support |
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* |
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* Copyright (C) 1999 VA Linux Systems |
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* Copyright (C) 1999 Walt Drummond <[email protected]> |
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* (c) Copyright 2001-2003, 2005 Hewlett-Packard Development Company, L.P. |
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* David Mosberger-Tang <[email protected]> |
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* Bjorn Helgaas <[email protected]> |
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*/ |
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#ifndef _ASM_IA64_SMP_H |
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#define _ASM_IA64_SMP_H |
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#include <linux/init.h> |
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#include <linux/threads.h> |
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#include <linux/kernel.h> |
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#include <linux/cpumask.h> |
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#include <linux/bitops.h> |
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#include <linux/irqreturn.h> |
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#include <asm/param.h> |
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#include <asm/processor.h> |
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#include <asm/ptrace.h> |
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static inline unsigned int |
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ia64_get_lid (void) |
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{ |
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union { |
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struct { |
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unsigned long reserved : 16; |
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unsigned long eid : 8; |
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unsigned long id : 8; |
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unsigned long ignored : 32; |
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} f; |
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unsigned long bits; |
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} lid; |
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lid.bits = ia64_getreg(_IA64_REG_CR_LID); |
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return lid.f.id << 8 | lid.f.eid; |
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} |
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#define hard_smp_processor_id() ia64_get_lid() |
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#ifdef CONFIG_SMP |
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#define raw_smp_processor_id() (current_thread_info()->cpu) |
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extern struct smp_boot_data { |
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int cpu_count; |
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int cpu_phys_id[NR_CPUS]; |
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} smp_boot_data __initdata; |
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extern char no_int_routing; |
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extern cpumask_t cpu_core_map[NR_CPUS]; |
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DECLARE_PER_CPU_SHARED_ALIGNED(cpumask_t, cpu_sibling_map); |
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extern int smp_num_siblings; |
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extern void __iomem *ipi_base_addr; |
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extern volatile int ia64_cpu_to_sapicid[]; |
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#define cpu_physical_id(i) ia64_cpu_to_sapicid[i] |
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extern unsigned long ap_wakeup_vector; |
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/* |
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* Function to map hard smp processor id to logical id. Slow, so don't use this in |
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* performance-critical code. |
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*/ |
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static inline int |
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cpu_logical_id (int cpuid) |
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{ |
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int i; |
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for (i = 0; i < NR_CPUS; ++i) |
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if (cpu_physical_id(i) == cpuid) |
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break; |
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return i; |
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} |
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/* Upping and downing of CPUs */ |
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extern int __cpu_disable (void); |
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extern void __cpu_die (unsigned int cpu); |
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extern void cpu_die (void) __attribute__ ((noreturn)); |
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extern void __init smp_build_cpu_map(void); |
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extern void __init init_smp_config (void); |
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extern void smp_do_timer (struct pt_regs *regs); |
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extern irqreturn_t handle_IPI(int irq, void *dev_id); |
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extern void smp_send_reschedule (int cpu); |
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extern void identify_siblings (struct cpuinfo_ia64 *); |
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extern int is_multithreading_enabled(void); |
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extern void arch_send_call_function_single_ipi(int cpu); |
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extern void arch_send_call_function_ipi_mask(const struct cpumask *mask); |
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#else /* CONFIG_SMP */ |
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#define cpu_logical_id(i) 0 |
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#define cpu_physical_id(i) ia64_get_lid() |
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#endif /* CONFIG_SMP */ |
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#endif /* _ASM_IA64_SMP_H */
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