From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Sat, 16 Apr 2005 15:20:36 -0700 Subject: Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip! --- include/asm-s390/smp.h | 108 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 108 insertions(+) create mode 100644 include/asm-s390/smp.h (limited to 'include/asm-s390/smp.h') diff --git a/include/asm-s390/smp.h b/include/asm-s390/smp.h new file mode 100644 index 00000000000..9473786387a --- /dev/null +++ b/include/asm-s390/smp.h @@ -0,0 +1,108 @@ +/* + * 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 +#include +#include +#include + +#if defined(__KERNEL__) && defined(CONFIG_SMP) && !defined(__ASSEMBLY__) + +#include +#include + +/* + s390 specific smp.c headers + */ +typedef struct +{ + int intresting; + sigp_ccode ccode; + __u32 status; + __u16 cpu; +} sigp_info; + +extern int smp_call_function_on(void (*func) (void *info), void *info, + int nonatomic, int wait, int cpu); +#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 smp_processor_id() (S390_lowcore.cpu_data.cpu_nr) + +extern int smp_get_cpu(cpumask_t cpu_map); +extern void smp_put_cpu(int cpu); + +extern __inline__ __u16 hard_smp_processor_id(void) +{ + __u16 cpu_address; + + __asm__ ("stap %0\n" : "=m" (cpu_address)); + return cpu_address; +} + +/* + * returns 1 if cpu is in stopped/check stopped state or not operational + * returns 0 otherwise + */ +static inline int +smp_cpu_not_running(int cpu) +{ + __u32 status; + + switch (signal_processor_ps(&status, 0, cpu, sigp_sense)) { + case sigp_order_code_accepted: + case sigp_status_stored: + /* Check for stopped and check stop state */ + if (status & 0x50) + return 1; + break; + case sigp_not_operational: + return 1; + default: + break; + } + return 0; +} + +#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); + +#endif + +#ifndef CONFIG_SMP +static inline int +smp_call_function_on(void (*func) (void *info), void *info, + int nonatomic, int wait, int cpu) +{ + func(info); + return 0; +} +#define smp_get_cpu(cpu) ({ 0; }) +#define smp_put_cpu(cpu) ({ 0; }) +#endif + +#endif -- cgit v1.2.3