arch/powerpc/include/asm/smp.h

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This source file includes following definitions.
get_hard_smp_processor_id
set_hard_smp_processor_id
cpu_sibling_mask
cpu_core_mask
cpu_l2_cache_mask
cpu_smallcore_mask
smp_handle_nmi_ipi
inhibit_secondary_onlining
uninhibit_secondary_onlining
cpu_sibling_mask
cpu_smallcore_mask
get_hard_smp_processor_id
set_hard_smp_processor_id
get_hard_smp_processor_id
set_hard_smp_processor_id
smp_release_cpus
   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 /* 
   3  * smp.h: PowerPC-specific SMP code.
   4  *
   5  * Original was a copy of sparc smp.h.  Now heavily modified
   6  * for PPC.
   7  *
   8  * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
   9  * Copyright (C) 1996-2001 Cort Dougan <cort@fsmlabs.com>
  10  */
  11 
  12 #ifndef _ASM_POWERPC_SMP_H
  13 #define _ASM_POWERPC_SMP_H
  14 #ifdef __KERNEL__
  15 
  16 #include <linux/threads.h>
  17 #include <linux/cpumask.h>
  18 #include <linux/kernel.h>
  19 #include <linux/irqreturn.h>
  20 
  21 #ifndef __ASSEMBLY__
  22 
  23 #ifdef CONFIG_PPC64
  24 #include <asm/paca.h>
  25 #endif
  26 #include <asm/percpu.h>
  27 
  28 extern int boot_cpuid;
  29 extern int spinning_secondaries;
  30 extern u32 *cpu_to_phys_id;
  31 
  32 extern void cpu_die(void);
  33 extern int cpu_to_chip_id(int cpu);
  34 
  35 #ifdef CONFIG_SMP
  36 
  37 struct smp_ops_t {
  38         void  (*message_pass)(int cpu, int msg);
  39 #ifdef CONFIG_PPC_SMP_MUXED_IPI
  40         void  (*cause_ipi)(int cpu);
  41 #endif
  42         int   (*cause_nmi_ipi)(int cpu);
  43         void  (*probe)(void);
  44         int   (*kick_cpu)(int nr);
  45         int   (*prepare_cpu)(int nr);
  46         void  (*setup_cpu)(int nr);
  47         void  (*bringup_done)(void);
  48         void  (*take_timebase)(void);
  49         void  (*give_timebase)(void);
  50         int   (*cpu_disable)(void);
  51         void  (*cpu_die)(unsigned int nr);
  52         int   (*cpu_bootable)(unsigned int nr);
  53 };
  54 
  55 extern int smp_send_nmi_ipi(int cpu, void (*fn)(struct pt_regs *), u64 delay_us);
  56 extern int smp_send_safe_nmi_ipi(int cpu, void (*fn)(struct pt_regs *), u64 delay_us);
  57 extern void smp_send_debugger_break(void);
  58 extern void start_secondary_resume(void);
  59 extern void smp_generic_give_timebase(void);
  60 extern void smp_generic_take_timebase(void);
  61 
  62 DECLARE_PER_CPU(unsigned int, cpu_pvr);
  63 
  64 #ifdef CONFIG_HOTPLUG_CPU
  65 int generic_cpu_disable(void);
  66 void generic_cpu_die(unsigned int cpu);
  67 void generic_set_cpu_dead(unsigned int cpu);
  68 void generic_set_cpu_up(unsigned int cpu);
  69 int generic_check_cpu_restart(unsigned int cpu);
  70 int is_cpu_dead(unsigned int cpu);
  71 #else
  72 #define generic_set_cpu_up(i)   do { } while (0)
  73 #endif
  74 
  75 #ifdef CONFIG_PPC64
  76 #define raw_smp_processor_id()  (local_paca->paca_index)
  77 #define hard_smp_processor_id() (get_paca()->hw_cpu_id)
  78 #else
  79 /* 32-bit */
  80 extern int smp_hw_index[];
  81 
  82 /*
  83  * This is particularly ugly: it appears we can't actually get the definition
  84  * of task_struct here, but we need access to the CPU this task is running on.
  85  * Instead of using task_struct we're using _TASK_CPU which is extracted from
  86  * asm-offsets.h by kbuild to get the current processor ID.
  87  *
  88  * This also needs to be safeguarded when building asm-offsets.s because at
  89  * that time _TASK_CPU is not defined yet. It could have been guarded by
  90  * _TASK_CPU itself, but we want the build to fail if _TASK_CPU is missing
  91  * when building something else than asm-offsets.s
  92  */
  93 #ifdef GENERATING_ASM_OFFSETS
  94 #define raw_smp_processor_id()          (0)
  95 #else
  96 #define raw_smp_processor_id()          (*(unsigned int *)((void *)current + _TASK_CPU))
  97 #endif
  98 #define hard_smp_processor_id()         (smp_hw_index[smp_processor_id()])
  99 
 100 static inline int get_hard_smp_processor_id(int cpu)
 101 {
 102         return smp_hw_index[cpu];
 103 }
 104 
 105 static inline void set_hard_smp_processor_id(int cpu, int phys)
 106 {
 107         smp_hw_index[cpu] = phys;
 108 }
 109 #endif
 110 
 111 DECLARE_PER_CPU(cpumask_var_t, cpu_sibling_map);
 112 DECLARE_PER_CPU(cpumask_var_t, cpu_l2_cache_map);
 113 DECLARE_PER_CPU(cpumask_var_t, cpu_core_map);
 114 DECLARE_PER_CPU(cpumask_var_t, cpu_smallcore_map);
 115 
 116 static inline struct cpumask *cpu_sibling_mask(int cpu)
 117 {
 118         return per_cpu(cpu_sibling_map, cpu);
 119 }
 120 
 121 static inline struct cpumask *cpu_core_mask(int cpu)
 122 {
 123         return per_cpu(cpu_core_map, cpu);
 124 }
 125 
 126 static inline struct cpumask *cpu_l2_cache_mask(int cpu)
 127 {
 128         return per_cpu(cpu_l2_cache_map, cpu);
 129 }
 130 
 131 static inline struct cpumask *cpu_smallcore_mask(int cpu)
 132 {
 133         return per_cpu(cpu_smallcore_map, cpu);
 134 }
 135 
 136 extern int cpu_to_core_id(int cpu);
 137 
 138 /* Since OpenPIC has only 4 IPIs, we use slightly different message numbers.
 139  *
 140  * Make sure this matches openpic_request_IPIs in open_pic.c, or what shows up
 141  * in /proc/interrupts will be wrong!!! --Troy */
 142 #define PPC_MSG_CALL_FUNCTION   0
 143 #define PPC_MSG_RESCHEDULE      1
 144 #define PPC_MSG_TICK_BROADCAST  2
 145 #define PPC_MSG_NMI_IPI         3
 146 
 147 /* This is only used by the powernv kernel */
 148 #define PPC_MSG_RM_HOST_ACTION  4
 149 
 150 #define NMI_IPI_ALL_OTHERS              -2
 151 
 152 #ifdef CONFIG_NMI_IPI
 153 extern int smp_handle_nmi_ipi(struct pt_regs *regs);
 154 #else
 155 static inline int smp_handle_nmi_ipi(struct pt_regs *regs) { return 0; }
 156 #endif
 157 
 158 /* for irq controllers that have dedicated ipis per message (4) */
 159 extern int smp_request_message_ipi(int virq, int message);
 160 extern const char *smp_ipi_name[];
 161 
 162 /* for irq controllers with only a single ipi */
 163 extern void smp_muxed_ipi_message_pass(int cpu, int msg);
 164 extern void smp_muxed_ipi_set_message(int cpu, int msg);
 165 extern irqreturn_t smp_ipi_demux(void);
 166 extern irqreturn_t smp_ipi_demux_relaxed(void);
 167 
 168 void smp_init_pSeries(void);
 169 void smp_init_cell(void);
 170 void smp_setup_cpu_maps(void);
 171 
 172 extern int __cpu_disable(void);
 173 extern void __cpu_die(unsigned int cpu);
 174 
 175 #else
 176 /* for UP */
 177 #define hard_smp_processor_id()         get_hard_smp_processor_id(0)
 178 #define smp_setup_cpu_maps()
 179 static inline void inhibit_secondary_onlining(void) {}
 180 static inline void uninhibit_secondary_onlining(void) {}
 181 static inline const struct cpumask *cpu_sibling_mask(int cpu)
 182 {
 183         return cpumask_of(cpu);
 184 }
 185 
 186 static inline const struct cpumask *cpu_smallcore_mask(int cpu)
 187 {
 188         return cpumask_of(cpu);
 189 }
 190 
 191 #endif /* CONFIG_SMP */
 192 
 193 #ifdef CONFIG_PPC64
 194 static inline int get_hard_smp_processor_id(int cpu)
 195 {
 196         return paca_ptrs[cpu]->hw_cpu_id;
 197 }
 198 
 199 static inline void set_hard_smp_processor_id(int cpu, int phys)
 200 {
 201         paca_ptrs[cpu]->hw_cpu_id = phys;
 202 }
 203 #else
 204 /* 32-bit */
 205 #ifndef CONFIG_SMP
 206 extern int boot_cpuid_phys;
 207 static inline int get_hard_smp_processor_id(int cpu)
 208 {
 209         return boot_cpuid_phys;
 210 }
 211 
 212 static inline void set_hard_smp_processor_id(int cpu, int phys)
 213 {
 214         boot_cpuid_phys = phys;
 215 }
 216 #endif /* !CONFIG_SMP */
 217 #endif /* !CONFIG_PPC64 */
 218 
 219 #if defined(CONFIG_PPC64) && (defined(CONFIG_SMP) || defined(CONFIG_KEXEC_CORE))
 220 extern void smp_release_cpus(void);
 221 #else
 222 static inline void smp_release_cpus(void) { };
 223 #endif
 224 
 225 extern int smt_enabled_at_boot;
 226 
 227 extern void smp_mpic_probe(void);
 228 extern void smp_mpic_setup_cpu(int cpu);
 229 extern int smp_generic_kick_cpu(int nr);
 230 extern int smp_generic_cpu_bootable(unsigned int nr);
 231 
 232 
 233 extern void smp_generic_give_timebase(void);
 234 extern void smp_generic_take_timebase(void);
 235 
 236 extern struct smp_ops_t *smp_ops;
 237 
 238 extern void arch_send_call_function_single_ipi(int cpu);
 239 extern void arch_send_call_function_ipi_mask(const struct cpumask *mask);
 240 
 241 /* Definitions relative to the secondary CPU spin loop
 242  * and entry point. Not all of them exist on both 32 and
 243  * 64-bit but defining them all here doesn't harm
 244  */
 245 extern void generic_secondary_smp_init(void);
 246 extern void generic_secondary_thread_init(void);
 247 extern unsigned long __secondary_hold_spinloop;
 248 extern unsigned long __secondary_hold_acknowledge;
 249 extern char __secondary_hold;
 250 extern unsigned int booting_thread_hwid;
 251 
 252 extern void __early_start(void);
 253 #endif /* __ASSEMBLY__ */
 254 
 255 #endif /* __KERNEL__ */
 256 #endif /* _ASM_POWERPC_SMP_H) */
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root/arch/powerpc/include/asm/smp.h

INCLUDED FROM

DEFINITIONS
