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