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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 | ||
1da177e4 LT |
13 | #include <linux/init.h> |
14 | #include <linux/threads.h> | |
15 | #include <linux/kernel.h> | |
16 | #include <linux/cpumask.h> | |
17 | ||
18 | #include <asm/bitops.h> | |
19 | #include <asm/io.h> | |
20 | #include <asm/param.h> | |
21 | #include <asm/processor.h> | |
22 | #include <asm/ptrace.h> | |
23 | ||
24 | static inline unsigned int | |
25 | ia64_get_lid (void) | |
26 | { | |
27 | union { | |
28 | struct { | |
29 | unsigned long reserved : 16; | |
30 | unsigned long eid : 8; | |
31 | unsigned long id : 8; | |
32 | unsigned long ignored : 32; | |
33 | } f; | |
34 | unsigned long bits; | |
35 | } lid; | |
36 | ||
37 | lid.bits = ia64_getreg(_IA64_REG_CR_LID); | |
38 | return lid.f.id << 8 | lid.f.eid; | |
39 | } | |
40 | ||
41 | #ifdef CONFIG_SMP | |
42 | ||
43 | #define XTP_OFFSET 0x1e0008 | |
44 | ||
45 | #define SMP_IRQ_REDIRECTION (1 << 0) | |
46 | #define SMP_IPI_REDIRECTION (1 << 1) | |
47 | ||
39c715b7 | 48 | #define raw_smp_processor_id() (current_thread_info()->cpu) |
1da177e4 LT |
49 | |
50 | extern struct smp_boot_data { | |
51 | int cpu_count; | |
52 | int cpu_phys_id[NR_CPUS]; | |
53 | } smp_boot_data __initdata; | |
54 | ||
55 | extern char no_int_routing __devinitdata; | |
56 | ||
57 | extern cpumask_t cpu_online_map; | |
e927ecb0 SS |
58 | extern cpumask_t cpu_core_map[NR_CPUS]; |
59 | extern cpumask_t cpu_sibling_map[NR_CPUS]; | |
60 | extern int smp_num_siblings; | |
61 | extern int smp_num_cpucores; | |
1da177e4 LT |
62 | extern void __iomem *ipi_base_addr; |
63 | extern unsigned char smp_int_redirect; | |
64 | ||
65 | extern volatile int ia64_cpu_to_sapicid[]; | |
66 | #define cpu_physical_id(i) ia64_cpu_to_sapicid[i] | |
67 | ||
68 | extern unsigned long ap_wakeup_vector; | |
69 | ||
70 | /* | |
71 | * Function to map hard smp processor id to logical id. Slow, so don't use this in | |
72 | * performance-critical code. | |
73 | */ | |
74 | static inline int | |
75 | cpu_logical_id (int cpuid) | |
76 | { | |
77 | int i; | |
78 | ||
79 | for (i = 0; i < NR_CPUS; ++i) | |
80 | if (cpu_physical_id(i) == cpuid) | |
81 | break; | |
82 | return i; | |
83 | } | |
84 | ||
85 | /* | |
86 | * XTP control functions: | |
87 | * min_xtp : route all interrupts to this CPU | |
88 | * normal_xtp: nominal XTP value | |
89 | * max_xtp : never deliver interrupts to this CPU. | |
90 | */ | |
91 | ||
92 | static inline void | |
93 | min_xtp (void) | |
94 | { | |
95 | if (smp_int_redirect & SMP_IRQ_REDIRECTION) | |
96 | writeb(0x00, ipi_base_addr + XTP_OFFSET); /* XTP to min */ | |
97 | } | |
98 | ||
99 | static inline void | |
100 | normal_xtp (void) | |
101 | { | |
102 | if (smp_int_redirect & SMP_IRQ_REDIRECTION) | |
103 | writeb(0x08, ipi_base_addr + XTP_OFFSET); /* XTP normal */ | |
104 | } | |
105 | ||
106 | static inline void | |
107 | max_xtp (void) | |
108 | { | |
109 | if (smp_int_redirect & SMP_IRQ_REDIRECTION) | |
110 | writeb(0x0f, ipi_base_addr + XTP_OFFSET); /* Set XTP to max */ | |
111 | } | |
112 | ||
113 | #define hard_smp_processor_id() ia64_get_lid() | |
114 | ||
115 | /* Upping and downing of CPUs */ | |
116 | extern int __cpu_disable (void); | |
117 | extern void __cpu_die (unsigned int cpu); | |
118 | extern void cpu_die (void) __attribute__ ((noreturn)); | |
119 | extern int __cpu_up (unsigned int cpu); | |
120 | extern void __init smp_build_cpu_map(void); | |
121 | ||
122 | extern void __init init_smp_config (void); | |
123 | extern void smp_do_timer (struct pt_regs *regs); | |
124 | ||
125 | extern int smp_call_function_single (int cpuid, void (*func) (void *info), void *info, | |
126 | int retry, int wait); | |
127 | extern void smp_send_reschedule (int cpu); | |
128 | extern void lock_ipi_calllock(void); | |
129 | extern void unlock_ipi_calllock(void); | |
e927ecb0 | 130 | extern void identify_siblings (struct cpuinfo_ia64 *); |
1da177e4 LT |
131 | |
132 | #else | |
133 | ||
134 | #define cpu_logical_id(i) 0 | |
135 | #define cpu_physical_id(i) ia64_get_lid() | |
136 | ||
137 | #endif /* CONFIG_SMP */ | |
138 | #endif /* _ASM_IA64_SMP_H */ |