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>
10 #ifndef _ASM_IA64_SMP_H
11 #define _ASM_IA64_SMP_H
13 #include <linux/init.h>
14 #include <linux/threads.h>
15 #include <linux/kernel.h>
16 #include <linux/cpumask.h>
17 #include <linux/bitops.h>
18 #include <linux/irqreturn.h>
21 #include <asm/param.h>
22 #include <asm/processor.h>
23 #include <asm/ptrace.h>
25 static inline unsigned int
30 unsigned long reserved : 16;
31 unsigned long eid : 8;
33 unsigned long ignored : 32;
38 lid.bits = ia64_getreg(_IA64_REG_CR_LID);
39 return lid.f.id << 8 | lid.f.eid;
42 extern int smp_call_function_mask(cpumask_t mask, void (*func)(void *),
43 void *info, int wait);
45 #define hard_smp_processor_id() ia64_get_lid()
49 #define XTP_OFFSET 0x1e0008
51 #define SMP_IRQ_REDIRECTION (1 << 0)
52 #define SMP_IPI_REDIRECTION (1 << 1)
54 #define raw_smp_processor_id() (current_thread_info()->cpu)
56 extern struct smp_boot_data {
58 int cpu_phys_id[NR_CPUS];
59 } smp_boot_data __initdata;
61 extern char no_int_routing __devinitdata;
63 extern cpumask_t cpu_online_map;
64 extern cpumask_t cpu_core_map[NR_CPUS];
65 DECLARE_PER_CPU(cpumask_t, cpu_sibling_map);
66 extern int smp_num_siblings;
67 extern void __iomem *ipi_base_addr;
68 extern unsigned char smp_int_redirect;
70 extern volatile int ia64_cpu_to_sapicid[];
71 #define cpu_physical_id(i) ia64_cpu_to_sapicid[i]
73 extern unsigned long ap_wakeup_vector;
76 * Function to map hard smp processor id to logical id. Slow, so don't use this in
77 * performance-critical code.
80 cpu_logical_id (int cpuid)
84 for (i = 0; i < NR_CPUS; ++i)
85 if (cpu_physical_id(i) == cpuid)
91 * XTP control functions:
92 * min_xtp : route all interrupts to this CPU
93 * normal_xtp: nominal XTP value
94 * max_xtp : never deliver interrupts to this CPU.
100 if (smp_int_redirect & SMP_IRQ_REDIRECTION)
101 writeb(0x00, ipi_base_addr + XTP_OFFSET); /* XTP to min */
107 if (smp_int_redirect & SMP_IRQ_REDIRECTION)
108 writeb(0x08, ipi_base_addr + XTP_OFFSET); /* XTP normal */
114 if (smp_int_redirect & SMP_IRQ_REDIRECTION)
115 writeb(0x0f, ipi_base_addr + XTP_OFFSET); /* Set XTP to max */
118 /* Upping and downing of CPUs */
119 extern int __cpu_disable (void);
120 extern void __cpu_die (unsigned int cpu);
121 extern void cpu_die (void) __attribute__ ((noreturn));
122 extern void __init smp_build_cpu_map(void);
124 extern void __init init_smp_config (void);
125 extern void smp_do_timer (struct pt_regs *regs);
127 extern irqreturn_t handle_IPI(int irq, void *dev_id);
128 extern void smp_send_reschedule (int cpu);
129 extern void lock_ipi_calllock(void);
130 extern void unlock_ipi_calllock(void);
131 extern void identify_siblings (struct cpuinfo_ia64 *);
132 extern int is_multithreading_enabled(void);
134 #else /* CONFIG_SMP */
136 #define cpu_logical_id(i) 0
137 #define cpu_physical_id(i) ia64_get_lid()
139 #endif /* CONFIG_SMP */
140 #endif /* _ASM_IA64_SMP_H */