arch/csky/include/asm/mmu_context.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2
   3 #ifndef __ASM_CSKY_MMU_CONTEXT_H
   4 #define __ASM_CSKY_MMU_CONTEXT_H
   5
   6 #include <asm-generic/mm_hooks.h>
   7 #include <asm/setup.h>
   8 #include <asm/page.h>
   9 #include <asm/cacheflush.h>
  10 #include <asm/tlbflush.h>
  11
  12 #include <linux/errno.h>
  13 #include <linux/sched.h>
  14 #include <abi/ckmmu.h>
  15
  16 #define ASID_MASK               ((1 << CONFIG_CPU_ASID_BITS) - 1)
  17 #define cpu_asid(mm)            (atomic64_read(&mm->context.asid) & ASID_MASK)
  18
  19 #define init_new_context(tsk,mm)        ({ atomic64_set(&(mm)->context.asid, 0); 0; })
  20
  21 void check_and_switch_context(struct mm_struct *mm, unsigned int cpu);
  22
  23 static inline void
  24 switch_mm(struct mm_struct *prev, struct mm_struct *next,
  25           struct task_struct *tsk)
  26 {
  27         unsigned int cpu = smp_processor_id();
  28
  29         if (prev != next)
  30                 check_and_switch_context(next, cpu);
  31
  32         setup_pgd(next->pgd, next->context.asid.counter);
  33
  34         flush_icache_deferred(next);
  35 }
  36
  37 #include <asm-generic/mmu_context.h>
  38
  39 #endif /* __ASM_CSKY_MMU_CONTEXT_H */