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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 | /* * SMP Support * * Copyright (C) 1999 VA Linux Systems * Copyright (C) 1999 Walt Drummond <drummond@valinux.com> * Copyright (C) 2001 Hewlett-Packard Co * Copyright (C) 2001 David Mosberger-Tang <davidm@hpl.hp.com> */ #ifndef _ASM_IA64_SMP_H #define _ASM_IA64_SMP_H #include <linux/config.h> #ifdef CONFIG_SMP #include <linux/init.h> #include <linux/threads.h> #include <linux/kernel.h> #include <asm/io.h> #include <asm/processor.h> #include <asm/ptrace.h> #define XTP_OFFSET 0x1e0008 #define SMP_IRQ_REDIRECTION (1 << 0) #define SMP_IPI_REDIRECTION (1 << 1) #define smp_processor_id() (current->processor) extern struct smp_boot_data { int cpu_count; int cpu_phys_id[NR_CPUS]; } smp_boot_data __initdata; extern char no_int_routing __initdata; extern volatile unsigned long cpu_online_map; extern unsigned long ipi_base_addr; extern unsigned char smp_int_redirect; extern int smp_num_cpus; extern volatile int ia64_cpu_to_sapicid[]; #define cpu_physical_id(i) ia64_cpu_to_sapicid[i] #define cpu_number_map(i) (i) #define cpu_logical_map(i) (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 < smp_num_cpus; ++i) if (cpu_physical_id(i) == (__u32) 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 */ } static inline unsigned int hard_smp_processor_id (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_get_lid(); return lid.f.id << 8 | lid.f.eid; } #define NO_PROC_ID (-1) #define PROC_CHANGE_PENALTY 20 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); #endif /* CONFIG_SMP */ #endif /* _ASM_IA64_SMP_H */ |