target/linux/ubicom32/files/arch/ubicom32/include/asm/smp.h

   1 /*
   2  * arch/ubicom32/include/asm/smp.h
   3  *   SMP definitions for Ubicom32 architecture.
   4  *
   5  * (C) Copyright 2009, Ubicom, Inc.
   6  *
   7  * This file is part of the Ubicom32 Linux Kernel Port.
   8  *
   9  * The Ubicom32 Linux Kernel Port is free software: you can redistribute
  10  * it and/or modify it under the terms of the GNU General Public License
  11  * as published by the Free Software Foundation, either version 2 of the
  12  * License, or (at your option) any later version.
  13  *
  14  * The Ubicom32 Linux Kernel Port is distributed in the hope that it
  15  * will be useful, but WITHOUT ANY WARRANTY; without even the implied
  16  * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
  17  * the GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with the Ubicom32 Linux Kernel Port.  If not,
  21  * see <http://www.gnu.org/licenses/>.
  22  *
  23  * Ubicom32 implementation derived from (with many thanks):
  24  *   arch/m68knommu
  25  *   arch/blackfin
  26  *   arch/parisc
  27  */
  28 #ifndef _ASM_UBICOM32_SMP_H
  29 #define _ASM_UBICOM32_SMP_H
  30
  31 #ifndef CONFIG_SMP
  32 #error you should not include smp.h if smp is off
  33 #endif
  34
  35 #ifndef ASSEMBLY
  36 #include <linux/bitops.h>
  37 #include <linux/threads.h>
  38 #include <linux/cpumask.h>
  39 #include <asm/ip5000.h>
  40
  41 typedef unsigned long address_t;
  42 extern unsigned int smp_ipi_irq;
  43
  44 /*
  45  * This magic constant controls our willingness to transfer
  46  * a process across CPUs.
  47  *
  48  * Such a transfer incurs cache and tlb
  49  * misses. The current value is inherited from i386. Still needs
  50  * to be tuned for parisc.
  51  */
  52 #define PROC_CHANGE_PENALTY     15              /* Schedule penalty */
  53 #define NO_PROC_ID              0xFF            /* No processor magic marker */
  54 #define ANY_PROC_ID             0xFF            /* Any processor magic marker */
  55
  56 #ifdef CONFIG_SMP
  57 #define raw_smp_processor_id()  (current_thread_info()->cpu)
  58 #endif /* CONFIG_SMP */
  59
  60 static inline int __cpu_disable (void)
  61 {
  62   return 0;
  63 }
  64
  65 static inline void __cpu_die (unsigned int cpu)
  66 {
  67         while(1) {
  68         };
  69 }
  70
  71 extern int __cpu_up(unsigned int cpu);
  72 extern void smp_send_timer_all(void);
  73 extern void smp_timer_broadcast(const struct cpumask *mask);
  74 extern void smp_set_affinity(unsigned int irq, const struct cpumask *dest);
  75 extern void arch_send_call_function_single_ipi(int cpu);
  76 #define arch_send_call_function_ipi_mask arch_send_call_function_ipi_mask
  77 extern void arch_send_call_function_ipi_mask(const struct cpumask *mask);
  78
  79 /*
  80  * TODO: Once these are fully tested, we should turn them into
  81  * inline macros for performance.
  82  */
  83 extern unsigned long smp_get_affinity(unsigned int irq, int *all);
  84 extern void smp_reset_ipi(unsigned long mask);
  85
  86 #endif /* !ASSEMBLY */
  87 #endif /*  _ASM_UBICOM32_SMP_H */