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 #define hard_smp_processor_id() ia64_get_lid()
46 #define XTP_OFFSET 0x1e0008
48 #define SMP_IRQ_REDIRECTION (1 << 0)
49 #define SMP_IPI_REDIRECTION (1 << 1)
51 #define raw_smp_processor_id() (current_thread_info()->cpu)
53 extern struct smp_boot_data {
55 int cpu_phys_id[NR_CPUS];
56 } smp_boot_data __initdata;
58 extern char no_int_routing __devinitdata;
60 extern cpumask_t cpu_online_map;
61 extern cpumask_t cpu_core_map[NR_CPUS];
62 DECLARE_PER_CPU(cpumask_t, cpu_sibling_map);
63 extern int smp_num_siblings;
64 extern void __iomem *ipi_base_addr;
65 extern unsigned char smp_int_redirect;
67 extern volatile int ia64_cpu_to_sapicid[];
68 #define cpu_physical_id(i) ia64_cpu_to_sapicid[i]
70 extern unsigned long ap_wakeup_vector;
73 * Function to map hard smp processor id to logical id. Slow, so don't use this in
74 * performance-critical code.
77 cpu_logical_id (int cpuid)
81 for (i = 0; i < NR_CPUS; ++i)
82 if (cpu_physical_id(i) == cpuid)
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.
97 if (smp_int_redirect & SMP_IRQ_REDIRECTION)
98 writeb(0x00, ipi_base_addr + XTP_OFFSET); /* XTP to min */
104 if (smp_int_redirect & SMP_IRQ_REDIRECTION)
105 writeb(0x08, ipi_base_addr + XTP_OFFSET); /* XTP normal */
111 if (smp_int_redirect & SMP_IRQ_REDIRECTION)
112 writeb(0x0f, ipi_base_addr + XTP_OFFSET); /* Set XTP to max */
115 /* Upping and downing of CPUs */
116 extern int __cpu_disable (void);
117 extern void __cpu_die (unsigned int cpu);
118 extern void cpu_die (void) __attribute__ ((noreturn));
119 extern void __init smp_build_cpu_map(void);
121 extern void __init init_smp_config (void);
122 extern void smp_do_timer (struct pt_regs *regs);
124 extern irqreturn_t handle_IPI(int irq, void *dev_id);
125 extern void smp_send_reschedule (int cpu);
126 extern void identify_siblings (struct cpuinfo_ia64 *);
127 extern int is_multithreading_enabled(void);
129 extern void arch_send_call_function_single_ipi(int cpu);
130 extern void arch_send_call_function_ipi(cpumask_t mask);
132 #else /* CONFIG_SMP */
134 #define cpu_logical_id(i) 0
135 #define cpu_physical_id(i) ia64_get_lid()
137 #endif /* CONFIG_SMP */
138 #endif /* _ASM_IA64_SMP_H */