smp.h (498495dba268b20e8eadd7fe93c140c68b6cc9d2) smp.h (b3545192e2b4647234254c5122f8cbfddbcbdaa0)
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>

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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
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>

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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/io.h>
22#include <asm/param.h>
23#include <asm/processor.h>
24#include <asm/ptrace.h>
25
26static inline unsigned int
27ia64_get_lid (void)
28{
29 union {

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39 lid.bits = ia64_getreg(_IA64_REG_CR_LID);
40 return lid.f.id << 8 | lid.f.eid;
41}
42
43#define hard_smp_processor_id() ia64_get_lid()
44
45#ifdef CONFIG_SMP
46
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 {

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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
47#define XTP_OFFSET 0x1e0008
48
49#define SMP_IRQ_REDIRECTION (1 << 0)
50#define SMP_IPI_REDIRECTION (1 << 1)
51
52#define raw_smp_processor_id() (current_thread_info()->cpu)
53
54extern struct smp_boot_data {
55 int cpu_count;
56 int cpu_phys_id[NR_CPUS];
57} smp_boot_data __initdata;
58
59extern char no_int_routing;
60
61extern cpumask_t cpu_core_map[NR_CPUS];
62DECLARE_PER_CPU_SHARED_ALIGNED(cpumask_t, cpu_sibling_map);
63extern int smp_num_siblings;
64extern void __iomem *ipi_base_addr;
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;
65extern unsigned char smp_int_redirect;
66
67extern volatile int ia64_cpu_to_sapicid[];
68#define cpu_physical_id(i) ia64_cpu_to_sapicid[i]
69
70extern unsigned long ap_wakeup_vector;
71
72/*
73 * Function to map hard smp processor id to logical id. Slow, so don't use this in

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79 int i;
80
81 for (i = 0; i < NR_CPUS; ++i)
82 if (cpu_physical_id(i) == cpuid)
83 break;
84 return i;
85}
86
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

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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
87/*
88 * XTP control functions:
89 * min_xtp : route all interrupts to this CPU
90 * normal_xtp: nominal XTP value
91 * max_xtp : never deliver interrupts to this CPU.
92 */
93
94static inline void
95min_xtp (void)
96{
97 if (smp_int_redirect & SMP_IRQ_REDIRECTION)
98 writeb(0x00, ipi_base_addr + XTP_OFFSET); /* XTP to min */
99}
100
101static inline void
102normal_xtp (void)
103{
104 if (smp_int_redirect & SMP_IRQ_REDIRECTION)
105 writeb(0x08, ipi_base_addr + XTP_OFFSET); /* XTP normal */
106}
107
108static inline void
109max_xtp (void)
110{
111 if (smp_int_redirect & SMP_IRQ_REDIRECTION)
112 writeb(0x0f, ipi_base_addr + XTP_OFFSET); /* Set XTP to max */
113}
114
115/* Upping and downing of CPUs */
116extern int __cpu_disable (void);
117extern void __cpu_die (unsigned int cpu);
118extern void cpu_die (void) __attribute__ ((noreturn));
119extern void __init smp_build_cpu_map(void);
120
121extern void __init init_smp_config (void);
122extern void smp_do_timer (struct pt_regs *regs);

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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);

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