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 #define raw_smp_processor_id() (current_thread_info()->cpu)
25 /* Map from cpu id to sequential logical cpu number. This will only
26 not be idempotent when cpus failed to come on-line. */
27 extern int __cpu_number_map[NR_CPUS];
28 #define cpu_number_map(cpu) __cpu_number_map[cpu]
30 /* The reverse map from sequential logical cpu number to cpu id. */
31 extern int __cpu_logical_map[NR_CPUS];
32 #define cpu_logical_map(cpu) __cpu_logical_map[cpu]
34 #define NO_PROC_ID (-1)
36 struct call_data_struct {
44 extern struct call_data_struct *call_data;
46 #define SMP_RESCHEDULE_YOURSELF 0x1 /* XXX braindead */
47 #define SMP_CALL_FUNCTION 0x2
49 extern cpumask_t phys_cpu_present_map;
50 #define cpu_possible_map phys_cpu_present_map
52 extern cpumask_t cpu_callout_map;
53 /* We don't mark CPUs online until __cpu_up(), so we need another measure */
54 static inline int num_booting_cpus(void)
56 return cpus_weight(cpu_callout_map);
60 * These are defined by the board-specific code.
64 * Cause the function described by call_data to be executed on the passed
65 * cpu. When the function has finished, increment the finished field of
68 extern void core_send_ipi(int cpu, unsigned int action);
71 * Firmware CPU startup hook
73 extern void prom_boot_secondary(int cpu, struct task_struct *idle);
76 * After we've done initial boot, this function is called to allow the
77 * board code to clean up state, if needed
79 extern void prom_init_secondary(void);
82 * Populate cpu_possible_map before smp_init, called from setup_arch.
84 extern void plat_smp_setup(void);
87 * Called in smp_prepare_cpus.
89 extern void plat_prepare_cpus(unsigned int max_cpus);
92 * Last chance for the board code to finish SMP initialization before
93 * the CPU is "online".
95 extern void prom_smp_finish(void);
97 /* Hook for after all CPUs are online */
98 extern void prom_cpus_done(void);
100 extern void asmlinkage smp_bootstrap(void);
103 * this function sends a 'reschedule' IPI to another CPU.
104 * it goes straight through and wastes no time serializing
105 * anything. Worst case is that we lose a reschedule ...
107 static inline void smp_send_reschedule(int cpu)
109 core_send_ipi(cpu, SMP_RESCHEDULE_YOURSELF);
112 extern asmlinkage void smp_call_function_interrupt(void);
114 #endif /* CONFIG_SMP */
116 #endif /* __ASM_SMP_H */