2 * This file is subject to the terms and conditions of the GNU General
3 * Public License. See the file "COPYING" in the main directory of this
4 * archive for more details.
6 * Copyright (C) 2000 - 2001 by Kanoj Sarcar (kanoj@sgi.com)
7 * Copyright (C) 2000 - 2001 by Silicon Graphics, Inc.
8 * Copyright (C) 2000, 2001, 2002 Ralf Baechle
9 * Copyright (C) 2000, 2001 Broadcom Corporation
17 #include <linux/bitops.h>
18 #include <linux/linkage.h>
19 #include <linux/threads.h>
20 #include <linux/cpumask.h>
21 #include <asm/atomic.h>
23 extern int smp_num_siblings;
24 extern cpumask_t cpu_sibling_map[];
26 #define raw_smp_processor_id() (current_thread_info()->cpu)
28 /* Map from cpu id to sequential logical cpu number. This will only
29 not be idempotent when cpus failed to come on-line. */
30 extern int __cpu_number_map[NR_CPUS];
31 #define cpu_number_map(cpu) __cpu_number_map[cpu]
33 /* The reverse map from sequential logical cpu number to cpu id. */
34 extern int __cpu_logical_map[NR_CPUS];
35 #define cpu_logical_map(cpu) __cpu_logical_map[cpu]
37 #define NO_PROC_ID (-1)
39 struct call_data_struct {
47 extern struct call_data_struct *call_data;
49 #define SMP_RESCHEDULE_YOURSELF 0x1 /* XXX braindead */
50 #define SMP_CALL_FUNCTION 0x2
52 extern cpumask_t phys_cpu_present_map;
53 #define cpu_possible_map phys_cpu_present_map
56 * These are defined by the board-specific code.
60 * Cause the function described by call_data to be executed on the passed
61 * cpu. When the function has finished, increment the finished field of
64 extern void core_send_ipi(int cpu, unsigned int action);
66 static inline void core_send_ipi_mask(cpumask_t mask, unsigned int action)
70 for_each_cpu_mask(i, mask)
71 core_send_ipi(i, action);
76 * Firmware CPU startup hook
78 extern void prom_boot_secondary(int cpu, struct task_struct *idle);
81 * After we've done initial boot, this function is called to allow the
82 * board code to clean up state, if needed
84 extern void prom_init_secondary(void);
87 * Populate cpu_possible_map before smp_init, called from setup_arch.
89 extern void plat_smp_setup(void);
92 * Called in smp_prepare_cpus.
94 extern void plat_prepare_cpus(unsigned int max_cpus);
97 * Last chance for the board code to finish SMP initialization before
98 * the CPU is "online".
100 extern void prom_smp_finish(void);
102 /* Hook for after all CPUs are online */
103 extern void prom_cpus_done(void);
105 extern void asmlinkage smp_bootstrap(void);
108 * this function sends a 'reschedule' IPI to another CPU.
109 * it goes straight through and wastes no time serializing
110 * anything. Worst case is that we lose a reschedule ...
112 static inline void smp_send_reschedule(int cpu)
114 core_send_ipi(cpu, SMP_RESCHEDULE_YOURSELF);
117 extern asmlinkage void smp_call_function_interrupt(void);
119 #endif /* CONFIG_SMP */
121 #endif /* __ASM_SMP_H */