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Diffstat (limited to 'include/asm-mips/smp.h')
| -rw-r--r-- | include/asm-mips/smp.h | 111 |
1 files changed, 111 insertions, 0 deletions
diff --git a/include/asm-mips/smp.h b/include/asm-mips/smp.h new file mode 100644 index 000000000000..8ba370ecfd4c --- /dev/null +++ b/include/asm-mips/smp.h @@ -0,0 +1,111 @@ +/* + * This file is subject to the terms and conditions of the GNU General + * Public License. See the file "COPYING" in the main directory of this + * archive for more details. + * + * Copyright (C) 2000 - 2001 by Kanoj Sarcar (kanoj@sgi.com) + * Copyright (C) 2000 - 2001 by Silicon Graphics, Inc. + * Copyright (C) 2000, 2001, 2002 Ralf Baechle + * Copyright (C) 2000, 2001 Broadcom Corporation + */ +#ifndef __ASM_SMP_H +#define __ASM_SMP_H + +#include <linux/config.h> + +#ifdef CONFIG_SMP + +#include <linux/bitops.h> +#include <linux/linkage.h> +#include <linux/threads.h> +#include <linux/cpumask.h> +#include <asm/atomic.h> + +#define smp_processor_id() (current_thread_info()->cpu) + +/* Map from cpu id to sequential logical cpu number. This will only + not be idempotent when cpus failed to come on-line. */ +extern int __cpu_number_map[NR_CPUS]; +#define cpu_number_map(cpu) __cpu_number_map[cpu] + +/* The reverse map from sequential logical cpu number to cpu id. */ +extern int __cpu_logical_map[NR_CPUS]; +#define cpu_logical_map(cpu) __cpu_logical_map[cpu] + +#define NO_PROC_ID (-1) + +struct call_data_struct { + void (*func)(void *); + void *info; + atomic_t started; + atomic_t finished; + int wait; +}; + +extern struct call_data_struct *call_data; + +#define SMP_RESCHEDULE_YOURSELF 0x1 /* XXX braindead */ +#define SMP_CALL_FUNCTION 0x2 + +extern cpumask_t phys_cpu_present_map; +extern cpumask_t cpu_online_map; +#define cpu_possible_map phys_cpu_present_map + +extern cpumask_t cpu_callout_map; +/* We don't mark CPUs online until __cpu_up(), so we need another measure */ +static inline int num_booting_cpus(void) +{ + return cpus_weight(cpu_callout_map); +} + +/* These are defined by the board-specific code. */ + +/* + * Cause the function described by call_data to be executed on the passed + * cpu. When the function has finished, increment the finished field of + * call_data. + */ +extern void core_send_ipi(int cpu, unsigned int action); + +/* + * Firmware CPU startup hook + */ +extern void prom_boot_secondary(int cpu, struct task_struct *idle); + +/* + * After we've done initial boot, this function is called to allow the + * board code to clean up state, if needed + */ +extern void prom_init_secondary(void); + +/* + * Detect available CPUs, populate phys_cpu_present_map before smp_init + */ +extern void prom_prepare_cpus(unsigned int max_cpus); + +/* + * Last chance for the board code to finish SMP initialization before + * the CPU is "online". + */ +extern void prom_smp_finish(void); + +/* Hook for after all CPUs are online */ +extern void prom_cpus_done(void); + +extern void asmlinkage smp_bootstrap(void); + +/* + * this function sends a 'reschedule' IPI to another CPU. + * it goes straight through and wastes no time serializing + * anything. Worst case is that we lose a reschedule ... + */ +static inline void smp_send_reschedule(int cpu) +{ + core_send_ipi(cpu, SMP_RESCHEDULE_YOURSELF); +} + +extern asmlinkage void smp_call_function_interrupt(void); + +#endif /* CONFIG_SMP */ + +#endif /* __ASM_SMP_H */ |