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Diffstat (limited to 'include/asm-ia64/smp.h')
| -rw-r--r-- | include/asm-ia64/smp.h | 134 |
1 files changed, 134 insertions, 0 deletions
diff --git a/include/asm-ia64/smp.h b/include/asm-ia64/smp.h new file mode 100644 index 000000000000..c4a227acfeb0 --- /dev/null +++ b/include/asm-ia64/smp.h @@ -0,0 +1,134 @@ +/* + * 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 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); + +#else + +#define cpu_logical_id(i) 0 +#define cpu_physical_id(i) ia64_get_lid() + +#endif /* CONFIG_SMP */ +#endif /* _ASM_IA64_SMP_H */ |