2 * smp.h: PPC64 specific SMP code.
4 * Original was a copy of sparc smp.h. Now heavily modified
7 * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
8 * Copyright (C) 1996-2001 Cort Dougan <cort@fsmlabs.com>
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License
12 * as published by the Free Software Foundation; either version
13 * 2 of the License, or (at your option) any later version.
20 #include <linux/config.h>
21 #include <linux/threads.h>
22 #include <linux/cpumask.h>
23 #include <linux/kernel.h>
31 extern void smp_send_debugger_break(int cpu);
33 extern void smp_message_recv(int, struct pt_regs *);
36 #define smp_processor_id() (get_paca()->xPacaIndex)
37 #define hard_smp_processor_id() (get_paca()->xHwProcNum)
40 * Retrieve the state of a CPU:
41 * online: CPU is in a normal run state
42 * possible: CPU is a candidate to be made online
43 * available: CPU is candidate for the 'possible' pool
44 * Used to get SMT threads started at boot time.
45 * present_at_boot: CPU was available at boot time. Used in DLPAR
46 * code to handle special cases for processor start up.
48 extern cpumask_t cpu_present_at_boot;
49 extern cpumask_t cpu_online_map;
50 extern cpumask_t cpu_possible_map;
51 extern cpumask_t cpu_available_map;
53 #define cpu_present_at_boot(cpu) cpu_isset(cpu, cpu_present_at_boot)
54 #define cpu_online(cpu) cpu_isset(cpu, cpu_online_map)
55 #define cpu_possible(cpu) cpu_isset(cpu, cpu_possible_map)
56 #define cpu_available(cpu) cpu_isset(cpu, cpu_available_map)
58 /* Since OpenPIC has only 4 IPIs, we use slightly different message numbers.
60 * Make sure this matches openpic_request_IPIs in open_pic.c, or what shows up
61 * in /proc/interrupts will be wrong!!! --Troy */
62 #define PPC_MSG_CALL_FUNCTION 0
63 #define PPC_MSG_RESCHEDULE 1
64 /* This is unused now */
66 #define PPC_MSG_MIGRATE_TASK 2
68 #define PPC_MSG_DEBUGGER_BREAK 3
70 extern cpumask_t irq_affinity[];
72 void smp_init_iSeries(void);
73 void smp_init_pSeries(void);
75 extern int __cpu_disable(void);
76 extern void __cpu_die(unsigned int cpu);
77 extern void cpu_die(void) __attribute__((noreturn));
78 #endif /* !(CONFIG_SMP) */
80 #define get_hard_smp_processor_id(CPU) (paca[(CPU)].xHwProcNum)
81 #define set_hard_smp_processor_id(CPU, VAL) \
82 do { (paca[(CPU)].xHwProcNum = VAL); } while (0)
84 #endif /* __ASSEMBLY__ */
86 #endif /* !(_PPC64_SMP_H) */
87 #endif /* __KERNEL__ */