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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * SMP Support
3 *
4 * Copyright (C) 1999 VA Linux Systems
5 * Copyright (C) 1999 Walt Drummond <drummond@valinux.com>
6 * (c) Copyright 2001-2003, 2005 Hewlett-Packard Development Company, L.P.
7 * David Mosberger-Tang <davidm@hpl.hp.com>
8 * Bjorn Helgaas <bjorn.helgaas@hp.com>
9 */
10#ifndef _ASM_IA64_SMP_H
11#define _ASM_IA64_SMP_H
12
Linus Torvalds1da177e2005-04-16 15:20:36 -070013#include <linux/init.h>
14#include <linux/threads.h>
15#include <linux/kernel.h>
16#include <linux/cpumask.h>
Jiri Slaby1977f032007-10-18 23:40:25 -070017#include <linux/bitops.h>
Isaku Yamahata444933c2008-05-19 22:13:28 +090018#include <linux/irqreturn.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070019
Linus Torvalds1da177e2005-04-16 15:20:36 -070020#include <asm/io.h>
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
Fernando Luis Vazquez Cao818563d2007-05-09 02:33:28 -070042#define hard_smp_processor_id() ia64_get_lid()
43
Linus Torvalds1da177e2005-04-16 15:20:36 -070044#ifdef CONFIG_SMP
45
46#define XTP_OFFSET 0x1e0008
47
48#define SMP_IRQ_REDIRECTION (1 << 0)
49#define SMP_IPI_REDIRECTION (1 << 1)
50
Ingo Molnar39c715b2005-06-21 17:14:34 -070051#define raw_smp_processor_id() (current_thread_info()->cpu)
Linus Torvalds1da177e2005-04-16 15:20:36 -070052
53extern struct smp_boot_data {
54 int cpu_count;
55 int cpu_phys_id[NR_CPUS];
56} smp_boot_data __initdata;
57
58extern char no_int_routing __devinitdata;
59
Suresh Siddhae927ecb2005-04-25 13:25:06 -070060extern cpumask_t cpu_core_map[NR_CPUS];
David Howells9b8de742009-04-21 23:00:24 +010061DECLARE_PER_CPU_SHARED_ALIGNED(cpumask_t, cpu_sibling_map);
Suresh Siddhae927ecb2005-04-25 13:25:06 -070062extern int smp_num_siblings;
Linus Torvalds1da177e2005-04-16 15:20:36 -070063extern void __iomem *ipi_base_addr;
64extern unsigned char smp_int_redirect;
65
66extern volatile int ia64_cpu_to_sapicid[];
67#define cpu_physical_id(i) ia64_cpu_to_sapicid[i]
68
69extern unsigned long ap_wakeup_vector;
70
71/*
72 * Function to map hard smp processor id to logical id. Slow, so don't use this in
73 * performance-critical code.
74 */
75static inline int
76cpu_logical_id (int cpuid)
77{
78 int i;
79
80 for (i = 0; i < NR_CPUS; ++i)
81 if (cpu_physical_id(i) == cpuid)
82 break;
83 return i;
84}
85
86/*
87 * XTP control functions:
88 * min_xtp : route all interrupts to this CPU
89 * normal_xtp: nominal XTP value
90 * max_xtp : never deliver interrupts to this CPU.
91 */
92
93static inline void
94min_xtp (void)
95{
96 if (smp_int_redirect & SMP_IRQ_REDIRECTION)
97 writeb(0x00, ipi_base_addr + XTP_OFFSET); /* XTP to min */
98}
99
100static inline void
101normal_xtp (void)
102{
103 if (smp_int_redirect & SMP_IRQ_REDIRECTION)
104 writeb(0x08, ipi_base_addr + XTP_OFFSET); /* XTP normal */
105}
106
107static inline void
108max_xtp (void)
109{
110 if (smp_int_redirect & SMP_IRQ_REDIRECTION)
111 writeb(0x0f, ipi_base_addr + XTP_OFFSET); /* Set XTP to max */
112}
113
Linus Torvalds1da177e2005-04-16 15:20:36 -0700114/* Upping and downing of CPUs */
115extern int __cpu_disable (void);
116extern void __cpu_die (unsigned int cpu);
117extern void cpu_die (void) __attribute__ ((noreturn));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700118extern void __init smp_build_cpu_map(void);
119
120extern void __init init_smp_config (void);
121extern void smp_do_timer (struct pt_regs *regs);
122
Isaku Yamahata444933c2008-05-19 22:13:28 +0900123extern irqreturn_t handle_IPI(int irq, void *dev_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700124extern void smp_send_reschedule (int cpu);
Suresh Siddhae927ecb2005-04-25 13:25:06 -0700125extern void identify_siblings (struct cpuinfo_ia64 *);
Stephane Eraniandd562c02006-09-21 10:35:44 -0700126extern int is_multithreading_enabled(void);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700127
Jens Axboef27b4332008-06-26 11:22:30 +0200128extern void arch_send_call_function_single_ipi(int cpu);
Rusty Russell40fe6972009-03-16 14:12:41 +1030129extern void arch_send_call_function_ipi_mask(const struct cpumask *mask);
Jens Axboef27b4332008-06-26 11:22:30 +0200130
Fernando Luis Vazquez Cao2f4dfe22007-05-09 02:33:25 -0700131#else /* CONFIG_SMP */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700132
Linus Torvalds1da177e2005-04-16 15:20:36 -0700133#define cpu_logical_id(i) 0
134#define cpu_physical_id(i) ia64_get_lid()
135
136#endif /* CONFIG_SMP */
137#endif /* _ASM_IA64_SMP_H */