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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 | ||
39c715b7 | 49 | #define raw_smp_processor_id() (current_thread_info()->cpu) |
1da177e4 LT |
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; | |
e927ecb0 SS |
59 | extern cpumask_t cpu_core_map[NR_CPUS]; |
60 | extern cpumask_t cpu_sibling_map[NR_CPUS]; | |
61 | extern int smp_num_siblings; | |
62 | extern int smp_num_cpucores; | |
1da177e4 LT |
63 | extern void __iomem *ipi_base_addr; |
64 | extern unsigned char smp_int_redirect; | |
65 | ||
66 | extern volatile int ia64_cpu_to_sapicid[]; | |
67 | #define cpu_physical_id(i) ia64_cpu_to_sapicid[i] | |
68 | ||
69 | extern unsigned long ap_wakeup_vector; | |
70 | ||
71 | /* | |
72 | * Function to map hard smp processor id to logical id. Slow, so don't use this in | |
73 | * performance-critical code. | |
74 | */ | |
75 | static inline int | |
76 | cpu_logical_id (int cpuid) | |
77 | { | |
78 | int i; | |
79 | ||
80 | for (i = 0; i < NR_CPUS; ++i) | |
81 | if (cpu_physical_id(i) == cpuid) | |
82 | break; | |
83 | return i; | |
84 | } | |
85 | ||
86 | /* | |
87 | * XTP control functions: | |
88 | * min_xtp : route all interrupts to this CPU | |
89 | * normal_xtp: nominal XTP value | |
90 | * max_xtp : never deliver interrupts to this CPU. | |
91 | */ | |
92 | ||
93 | static inline void | |
94 | min_xtp (void) | |
95 | { | |
96 | if (smp_int_redirect & SMP_IRQ_REDIRECTION) | |
97 | writeb(0x00, ipi_base_addr + XTP_OFFSET); /* XTP to min */ | |
98 | } | |
99 | ||
100 | static inline void | |
101 | normal_xtp (void) | |
102 | { | |
103 | if (smp_int_redirect & SMP_IRQ_REDIRECTION) | |
104 | writeb(0x08, ipi_base_addr + XTP_OFFSET); /* XTP normal */ | |
105 | } | |
106 | ||
107 | static inline void | |
108 | max_xtp (void) | |
109 | { | |
110 | if (smp_int_redirect & SMP_IRQ_REDIRECTION) | |
111 | writeb(0x0f, ipi_base_addr + XTP_OFFSET); /* Set XTP to max */ | |
112 | } | |
113 | ||
114 | #define hard_smp_processor_id() ia64_get_lid() | |
115 | ||
116 | /* Upping and downing of CPUs */ | |
117 | extern int __cpu_disable (void); | |
118 | extern void __cpu_die (unsigned int cpu); | |
119 | extern void cpu_die (void) __attribute__ ((noreturn)); | |
120 | extern int __cpu_up (unsigned int cpu); | |
121 | extern void __init smp_build_cpu_map(void); | |
122 | ||
123 | extern void __init init_smp_config (void); | |
124 | extern void smp_do_timer (struct pt_regs *regs); | |
125 | ||
126 | extern int smp_call_function_single (int cpuid, void (*func) (void *info), void *info, | |
127 | int retry, int wait); | |
128 | extern void smp_send_reschedule (int cpu); | |
129 | extern void lock_ipi_calllock(void); | |
130 | extern void unlock_ipi_calllock(void); | |
e927ecb0 | 131 | extern void identify_siblings (struct cpuinfo_ia64 *); |
1da177e4 LT |
132 | |
133 | #else | |
134 | ||
135 | #define cpu_logical_id(i) 0 | |
136 | #define cpu_physical_id(i) ia64_get_lid() | |
137 | ||
138 | #endif /* CONFIG_SMP */ | |
139 | #endif /* _ASM_IA64_SMP_H */ |