include/asm/smp-ops.h

0001 /*
0002  * This file is subject to the terms and conditions of the GNU General
0003  * Public License.  See the file "COPYING" in the main directory of this
0004  * archive for more details.
0005  *
0006  * Copyright (C) 2000 - 2001 by Kanoj Sarcar (kanoj@sgi.com)
0007  * Copyright (C) 2000 - 2001 by Silicon Graphics, Inc.
0008  * Copyright (C) 2000, 2001, 2002 Ralf Baechle
0009  * Copyright (C) 2000, 2001 Broadcom Corporation
0010  */
0011 #ifndef __ASM_SMP_OPS_H
0012 #define __ASM_SMP_OPS_H
0013
0014 #include <linux/errno.h>
0015
0016 #include <asm/mips-cps.h>
0017
0018 #ifdef CONFIG_SMP
0019
0020 #include <linux/cpumask.h>
0021
0022 struct task_struct;
0023
0024 struct plat_smp_ops {
0025     void (*send_ipi_single)(int cpu, unsigned int action);
0026     void (*send_ipi_mask)(const struct cpumask *mask, unsigned int action);
0027     void (*init_secondary)(void);
0028     void (*smp_finish)(void);
0029     int (*boot_secondary)(int cpu, struct task_struct *idle);
0030     void (*smp_setup)(void);
0031     void (*prepare_cpus)(unsigned int max_cpus);
0032     void (*prepare_boot_cpu)(void);
0033 #ifdef CONFIG_HOTPLUG_CPU
0034     int (*cpu_disable)(void);
0035     void (*cpu_die)(unsigned int cpu);
0036 #endif
0037 #ifdef CONFIG_KEXEC
0038     void (*kexec_nonboot_cpu)(void);
0039 #endif
0040 };
0041
0042 extern void register_smp_ops(const struct plat_smp_ops *ops);
0043
0044 static inline void plat_smp_setup(void)
0045 {
0046     extern const struct plat_smp_ops *mp_ops;   /* private */
0047
0048     mp_ops->smp_setup();
0049 }
0050
0051 extern void mips_smp_send_ipi_single(int cpu, unsigned int action);
0052 extern void mips_smp_send_ipi_mask(const struct cpumask *mask,
0053                       unsigned int action);
0054
0055 #else /* !CONFIG_SMP */
0056
0057 struct plat_smp_ops;
0058
0059 static inline void plat_smp_setup(void)
0060 {
0061     /* UP, nothing to do ...  */
0062 }
0063
0064 static inline void register_smp_ops(const struct plat_smp_ops *ops)
0065 {
0066 }
0067
0068 #endif /* !CONFIG_SMP */
0069
0070 static inline int register_up_smp_ops(void)
0071 {
0072 #ifdef CONFIG_SMP_UP
0073     extern const struct plat_smp_ops up_smp_ops;
0074
0075     register_smp_ops(&up_smp_ops);
0076
0077     return 0;
0078 #else
0079     return -ENODEV;
0080 #endif
0081 }
0082
0083 static inline int register_cmp_smp_ops(void)
0084 {
0085 #ifdef CONFIG_MIPS_CMP
0086     extern const struct plat_smp_ops cmp_smp_ops;
0087
0088     if (!mips_cm_present())
0089         return -ENODEV;
0090
0091     register_smp_ops(&cmp_smp_ops);
0092
0093     return 0;
0094 #else
0095     return -ENODEV;
0096 #endif
0097 }
0098
0099 static inline int register_vsmp_smp_ops(void)
0100 {
0101 #ifdef CONFIG_MIPS_MT_SMP
0102     extern const struct plat_smp_ops vsmp_smp_ops;
0103
0104     if (!cpu_has_mipsmt)
0105         return -ENODEV;
0106
0107     register_smp_ops(&vsmp_smp_ops);
0108
0109     return 0;
0110 #else
0111     return -ENODEV;
0112 #endif
0113 }
0114
0115 #ifdef CONFIG_MIPS_CPS
0116 extern int register_cps_smp_ops(void);
0117 #else
0118 static inline int register_cps_smp_ops(void)
0119 {
0120     return -ENODEV;
0121 }
0122 #endif
0123
0124 #endif /* __ASM_SMP_OPS_H */