projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
1 | /* |
| 2 | * include/asm-s390/smp.h | |
| 3 | * | |
| 4 | * S390 version | |
| 5 | * Copyright (C) 1999 IBM Deutschland Entwicklung GmbH, IBM Corporation | |
| 6 | * Author(s): Denis Joseph Barrow (djbarrow@de.ibm.com,barrow_dj@yahoo.com), | |
| 7 | * Martin Schwidefsky (schwidefsky@de.ibm.com) | |
| 8 | * Heiko Carstens (heiko.carstens@de.ibm.com) | |
| 9 | */ | |
| 10 | #ifndef __ASM_SMP_H | |
| 11 | #define __ASM_SMP_H | |
| 12 | ||
| 1da177e4 LT |
13 | #include <linux/threads.h> |
| 14 | #include <linux/cpumask.h> | |
| 15 | #include <linux/bitops.h> | |
| 16 | ||
| 17 | #if defined(__KERNEL__) && defined(CONFIG_SMP) && !defined(__ASSEMBLY__) | |
| 18 | ||
| 19 | #include <asm/lowcore.h> | |
| 20 | #include <asm/sigp.h> | |
| c6b5b847 | 21 | #include <asm/ptrace.h> |
| 2e5061e4 | 22 | #include <asm/system.h> |
| 1da177e4 LT |
23 | |
| 24 | /* | |
| 25 | s390 specific smp.c headers | |
| 26 | */ | |
| 27 | typedef struct | |
| 28 | { | |
| 29 | int intresting; | |
| 30 | sigp_ccode ccode; | |
| 31 | __u32 status; | |
| 32 | __u16 cpu; | |
| 33 | } sigp_info; | |
| 34 | ||
| 2b67fc46 HC |
35 | extern void machine_restart_smp(char *); |
| 36 | extern void machine_halt_smp(void); | |
| 37 | extern void machine_power_off_smp(void); | |
| 38 | ||
| 1da177e4 LT |
39 | #define NO_PROC_ID 0xFF /* No processor magic marker */ |
| 40 | ||
| 41 | /* | |
| 42 | * This magic constant controls our willingness to transfer | |
| 43 | * a process across CPUs. Such a transfer incurs misses on the L1 | |
| 44 | * cache, and on a P6 or P5 with multiple L2 caches L2 hits. My | |
| 45 | * gut feeling is this will vary by board in value. For a board | |
| 46 | * with separate L2 cache it probably depends also on the RSS, and | |
| 47 | * for a board with shared L2 cache it ought to decay fast as other | |
| 48 | * processes are run. | |
| 49 | */ | |
| 50 | ||
| 51 | #define PROC_CHANGE_PENALTY 20 /* Schedule penalty */ | |
| 52 | ||
| 7b468488 | 53 | #define raw_smp_processor_id() (S390_lowcore.cpu_nr) |
| 5c0b912e | 54 | #define cpu_logical_map(cpu) (cpu) |
| 1da177e4 LT |
55 | |
| 56 | extern int __cpu_disable (void); | |
| 57 | extern void __cpu_die (unsigned int cpu); | |
| 58 | extern void cpu_die (void) __attribute__ ((noreturn)); | |
| 59 | extern int __cpu_up (unsigned int cpu); | |
| 60 | ||
| dbd70fb4 | 61 | extern struct mutex smp_cpu_state_mutex; |
| c10fde0d | 62 | extern int smp_cpu_polarization[]; |
| dbd70fb4 | 63 | |
| ca9fc75a HC |
64 | extern void arch_send_call_function_single_ipi(int cpu); |
| 65 | extern void arch_send_call_function_ipi(cpumask_t mask); | |
| 66 | ||
| 1da177e4 LT |
67 | #endif |
| 68 | ||
| 1e489518 HC |
69 | #ifdef CONFIG_HOTPLUG_CPU |
| 70 | extern int smp_rescan_cpus(void); | |
| 71 | #else | |
| 72 | static inline int smp_rescan_cpus(void) { return 0; } | |
| 73 | #endif | |
| 74 | ||
| 411ed322 | 75 | extern union save_area *zfcpdump_save_areas[NR_CPUS + 1]; |
| 1da177e4 | 76 | #endif |