/* * SMP Support * * Copyright (C) 1999 VA Linux Systems * Copyright (C) 1999 Walt Drummond <drummond@valinux.com> * (c) Copyright 2001-2003, 2005 Hewlett-Packard Development Company, L.P. * David Mosberger-Tang <davidm@hpl.hp.com> * Bjorn Helgaas <bjorn.helgaas@hp.com> */ #ifndef _ASM_IA64_SMP_H #define _ASM_IA64_SMP_H #include <linux/config.h> #include <linux/init.h> #include <linux/threads.h> #include <linux/kernel.h> #include <linux/cpumask.h> #include <asm/bitops.h> #include <asm/io.h> #include <asm/param.h> #include <asm/processor.h> #include <asm/ptrace.h> static inline unsigned int ia64_get_lid (void) { union { struct { unsigned long reserved : 16; unsigned long eid : 8; unsigned long id : 8; unsigned long ignored : 32; } f; unsigned long bits; } lid; lid.bits = ia64_getreg(_IA64_REG_CR_LID); return lid.f.id << 8 | lid.f.eid; } #ifdef CONFIG_SMP #define XTP_OFFSET 0x1e0008 #define SMP_IRQ_REDIRECTION (1 << 0) #define SMP_IPI_REDIRECTION (1 << 1) #define smp_processor_id() (current_thread_info()->cpu) extern struct smp_boot_data { int cpu_count; int cpu_phys_id[NR_CPUS]; } smp_boot_data __initdata; extern char no_int_routing __devinitdata; extern cpumask_t cpu_online_map; extern cpumask_t cpu_core_map[NR_CPUS]; extern cpumask_t cpu_sibling_map[NR_CPUS]; extern int smp_num_siblings; extern int smp_num_cpucores; extern void __iomem *ipi_base_addr; extern unsigned char smp_int_redirect; extern volatile int ia64_cpu_to_sapicid[]; #define cpu_physical_id(i) ia64_cpu_to_sapicid[i] extern unsigned long ap_wakeup_vector; /* * Function to map hard smp processor id to logical id. Slow, so don't use this in * performance-critical code. */ static inline int cpu_logical_id (int cpuid) { int i; for (i = 0; i < NR_CPUS; ++i) if (cpu_physical_id(i) == cpuid) break; return i; } /* * XTP control functions: * min_xtp : route all interrupts to this CPU * normal_xtp: nominal XTP value * max_xtp : never deliver interrupts to this CPU. */ static inline void min_xtp (void) { if (smp_int_redirect & SMP_IRQ_REDIRECTION) writeb(0x00, ipi_base_addr + XTP_OFFSET); /* XTP to min */ } static inline void normal_xtp (void) { if (smp_int_redirect & SMP_IRQ_REDIRECTION) writeb(0x08, ipi_base_addr + XTP_OFFSET); /* XTP normal */ } static inline void max_xtp (void) { if (smp_int_redirect & SMP_IRQ_REDIRECTION) writeb(0x0f, ipi_base_addr + XTP_OFFSET); /* Set XTP to max */ } #define hard_smp_processor_id() ia64_get_lid() /* Upping and downing of CPUs */ extern int __cpu_disable (void); extern void __cpu_die (unsigned int cpu); extern void cpu_die (void) __attribute__ ((noreturn)); extern int __cpu_up (unsigned int cpu); extern void __init smp_build_cpu_map(void); extern void __init init_smp_config (void); extern void smp_do_timer (struct pt_regs *regs); extern int smp_call_function_single (int cpuid, void (*func) (void *info), void *info, int retry, int wait); extern void smp_send_reschedule (int cpu); extern void lock_ipi_calllock(void); extern void unlock_ipi_calllock(void); extern void identify_siblings (struct cpuinfo_ia64 *); #else #define cpu_logical_id(i) 0 #define cpu_physical_id(i) ia64_get_lid() #endif /* CONFIG_SMP */ #endif /* _ASM_IA64_SMP_H */