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 */
40