| /* |
| * include/asm-s390/smp.h |
| * |
| * S390 version |
| * Copyright (C) 1999 IBM Deutschland Entwicklung GmbH, IBM Corporation |
| * Author(s): Denis Joseph Barrow (djbarrow@de.ibm.com,barrow_dj@yahoo.com), |
| * Martin Schwidefsky (schwidefsky@de.ibm.com) |
| * Heiko Carstens (heiko.carstens@de.ibm.com) |
| */ |
| #ifndef __ASM_SMP_H |
| #define __ASM_SMP_H |
| |
| #include <linux/threads.h> |
| #include <linux/cpumask.h> |
| #include <linux/bitops.h> |
| |
| #if defined(__KERNEL__) && defined(CONFIG_SMP) && !defined(__ASSEMBLY__) |
| |
| #include <asm/lowcore.h> |
| #include <asm/sigp.h> |
| #include <asm/ptrace.h> |
| #include <asm/system.h> |
| |
| /* |
| s390 specific smp.c headers |
| */ |
| typedef struct |
| { |
| int intresting; |
| sigp_ccode ccode; |
| __u32 status; |
| __u16 cpu; |
| } sigp_info; |
| |
| extern void machine_restart_smp(char *); |
| extern void machine_halt_smp(void); |
| extern void machine_power_off_smp(void); |
| |
| #define NO_PROC_ID 0xFF /* No processor magic marker */ |
| |
| /* |
| * This magic constant controls our willingness to transfer |
| * a process across CPUs. Such a transfer incurs misses on the L1 |
| * cache, and on a P6 or P5 with multiple L2 caches L2 hits. My |
| * gut feeling is this will vary by board in value. For a board |
| * with separate L2 cache it probably depends also on the RSS, and |
| * for a board with shared L2 cache it ought to decay fast as other |
| * processes are run. |
| */ |
| |
| #define PROC_CHANGE_PENALTY 20 /* Schedule penalty */ |
| |
| #define raw_smp_processor_id() (S390_lowcore.cpu_nr) |
| #define cpu_logical_map(cpu) (cpu) |
| |
| extern int __cpu_disable (void); |
| extern void __cpu_die (unsigned int cpu); |
| extern void cpu_die (void) __attribute__ ((noreturn)); |
| extern int __cpu_up (unsigned int cpu); |
| |
| extern struct mutex smp_cpu_state_mutex; |
| extern int smp_cpu_polarization[]; |
| |
| extern void arch_send_call_function_single_ipi(int cpu); |
| extern void arch_send_call_function_ipi(cpumask_t mask); |
| |
| #endif |
| |
| #ifdef CONFIG_HOTPLUG_CPU |
| extern int smp_rescan_cpus(void); |
| #else |
| static inline int smp_rescan_cpus(void) { return 0; } |
| #endif |
| |
| extern union save_area *zfcpdump_save_areas[NR_CPUS + 1]; |
| #endif |