projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
1 | /* |
| 2 | * SMP Support | |
| 3 | * | |
| 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> | |
| 9 | */ | |
| 10 | #ifndef _ASM_IA64_SMP_H | |
| 11 | #define _ASM_IA64_SMP_H | |
| 12 | ||
| 13 | #include <linux/config.h> | |
| 14 | #include <linux/init.h> | |
| 15 | #include <linux/threads.h> | |
| 16 | #include <linux/kernel.h> | |
| 17 | #include <linux/cpumask.h> | |
| 18 | ||
| 19 | #include <asm/bitops.h> | |
| 20 | #include <asm/io.h> | |
| 21 | #include <asm/param.h> | |
| 22 | #include <asm/processor.h> | |
| 23 | #include <asm/ptrace.h> | |
| 24 | ||
| 25 | static inline unsigned int | |
| 26 | ia64_get_lid (void) | |
| 27 | { | |
| 28 | union { | |
| 29 | struct { | |
| 30 | unsigned long reserved : 16; | |
| 31 | unsigned long eid : 8; | |
| 32 | unsigned long id : 8; | |
| 33 | unsigned long ignored : 32; | |
| 34 | } f; | |
| 35 | unsigned long bits; | |
| 36 | } lid; | |
| 37 | ||
| 38 | lid.bits = ia64_getreg(_IA64_REG_CR_LID); | |
| 39 | return lid.f.id << 8 | lid.f.eid; | |
| 40 | } | |
| 41 | ||
| 42 | #ifdef CONFIG_SMP | |
| 43 | ||
| 44 | #define XTP_OFFSET 0x1e0008 | |
| 45 | ||
| 46 | #define SMP_IRQ_REDIRECTION (1 << 0) | |
| 47 | #define SMP_IPI_REDIRECTION (1 << 1) | |
| 48 | ||
| 49 | #define smp_processor_id() (current_thread_info()->cpu) | |
| 50 | ||
| 51 | extern struct smp_boot_data { | |
| 52 | int cpu_count; | |
| 53 | int cpu_phys_id[NR_CPUS]; | |
| 54 | } smp_boot_data __initdata; | |
| 55 | ||
| 56 | extern char no_int_routing __devinitdata; | |
| 57 | ||
| 58 | extern cpumask_t cpu_online_map; | |
| 59 | extern void __iomem *ipi_base_addr; | |
| 60 | extern unsigned char smp_int_redirect; | |
| 61 | ||
| 62 | extern volatile int ia64_cpu_to_sapicid[]; | |
| 63 | #define cpu_physical_id(i) ia64_cpu_to_sapicid[i] | |
| 64 | ||
| 65 | extern unsigned long ap_wakeup_vector; | |
| 66 | ||
| 67 | /* | |
| 68 | * Function to map hard smp processor id to logical id. Slow, so don't use this in | |
| 69 | * performance-critical code. | |
| 70 | */ | |
| 71 | static inline int | |
| 72 | cpu_logical_id (int cpuid) | |
| 73 | { | |
| 74 | int i; | |
| 75 | ||
| 76 | for (i = 0; i < NR_CPUS; ++i) | |
| 77 | if (cpu_physical_id(i) == cpuid) | |
| 78 | break; | |
| 79 | return i; | |
| 80 | } | |
| 81 | ||
| 82 | /* | |
| 83 | * XTP control functions: | |
| 84 | * min_xtp : route all interrupts to this CPU | |
| 85 | * normal_xtp: nominal XTP value | |
| 86 | * max_xtp : never deliver interrupts to this CPU. | |
| 87 | */ | |
| 88 | ||
| 89 | static inline void | |
| 90 | min_xtp (void) | |
| 91 | { | |
| 92 | if (smp_int_redirect & SMP_IRQ_REDIRECTION) | |
| 93 | writeb(0x00, ipi_base_addr + XTP_OFFSET); /* XTP to min */ | |
| 94 | } | |
| 95 | ||
| 96 | static inline void | |
| 97 | normal_xtp (void) | |
| 98 | { | |
| 99 | if (smp_int_redirect & SMP_IRQ_REDIRECTION) | |
| 100 | writeb(0x08, ipi_base_addr + XTP_OFFSET); /* XTP normal */ | |
| 101 | } | |
| 102 | ||
| 103 | static inline void | |
| 104 | max_xtp (void) | |
| 105 | { | |
| 106 | if (smp_int_redirect & SMP_IRQ_REDIRECTION) | |
| 107 | writeb(0x0f, ipi_base_addr + XTP_OFFSET); /* Set XTP to max */ | |
| 108 | } | |
| 109 | ||
| 110 | #define hard_smp_processor_id() ia64_get_lid() | |
| 111 | ||
| 112 | /* Upping and downing of CPUs */ | |
| 113 | extern int __cpu_disable (void); | |
| 114 | extern void __cpu_die (unsigned int cpu); | |
| 115 | extern void cpu_die (void) __attribute__ ((noreturn)); | |
| 116 | extern int __cpu_up (unsigned int cpu); | |
| 117 | extern void __init smp_build_cpu_map(void); | |
| 118 | ||
| 119 | extern void __init init_smp_config (void); | |
| 120 | extern void smp_do_timer (struct pt_regs *regs); | |
| 121 | ||
| 122 | extern int smp_call_function_single (int cpuid, void (*func) (void *info), void *info, | |
| 123 | int retry, int wait); | |
| 124 | extern void smp_send_reschedule (int cpu); | |
| 125 | extern void lock_ipi_calllock(void); | |
| 126 | extern void unlock_ipi_calllock(void); | |
| 127 | ||
| 128 | #else | |
| 129 | ||
| 130 | #define cpu_logical_id(i) 0 | |
| 131 | #define cpu_physical_id(i) ia64_get_lid() | |
| 132 | ||
| 133 | #endif /* CONFIG_SMP */ | |
| 134 | #endif /* _ASM_IA64_SMP_H */ |