mirror of
https://github.com/torvalds/linux.git
synced 2025-11-04 02:30:34 +02:00
7f9ea6b799
This patch corrects the SPDX License Identifier style in the nds32 Hardware Architecture related files. Suggested-by: Joe Perches <joe@perches.com> Signed-off-by: Nishad Kamdar <nishadkamdar@gmail.com> Acked-by: Greentime Hu <greentime@andestech.com> Signed-off-by: Greentime Hu <greentime@andestech.com>
68 lines
1.5 KiB
C
68 lines
1.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
// Copyright (C) 2005-2017 Andes Technology Corporation
|
|
|
|
#ifndef __ASM_NDS32_MMU_CONTEXT_H
|
|
#define __ASM_NDS32_MMU_CONTEXT_H
|
|
|
|
#include <linux/spinlock.h>
|
|
#include <asm/tlbflush.h>
|
|
#include <asm/proc-fns.h>
|
|
#include <asm-generic/mm_hooks.h>
|
|
|
|
static inline int
|
|
init_new_context(struct task_struct *tsk, struct mm_struct *mm)
|
|
{
|
|
mm->context.id = 0;
|
|
return 0;
|
|
}
|
|
|
|
#define destroy_context(mm) do { } while(0)
|
|
|
|
#define CID_BITS 9
|
|
extern spinlock_t cid_lock;
|
|
extern unsigned int cpu_last_cid;
|
|
|
|
static inline void __new_context(struct mm_struct *mm)
|
|
{
|
|
unsigned int cid;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&cid_lock, flags);
|
|
cid = cpu_last_cid;
|
|
cpu_last_cid += 1 << TLB_MISC_offCID;
|
|
if (cpu_last_cid == 0)
|
|
cpu_last_cid = 1 << TLB_MISC_offCID << CID_BITS;
|
|
|
|
if ((cid & TLB_MISC_mskCID) == 0)
|
|
flush_tlb_all();
|
|
spin_unlock_irqrestore(&cid_lock, flags);
|
|
|
|
mm->context.id = cid;
|
|
}
|
|
|
|
static inline void check_context(struct mm_struct *mm)
|
|
{
|
|
if (unlikely
|
|
((mm->context.id ^ cpu_last_cid) >> TLB_MISC_offCID >> CID_BITS))
|
|
__new_context(mm);
|
|
}
|
|
|
|
static inline void enter_lazy_tlb(struct mm_struct *mm, struct task_struct *tsk)
|
|
{
|
|
}
|
|
|
|
static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next,
|
|
struct task_struct *tsk)
|
|
{
|
|
unsigned int cpu = smp_processor_id();
|
|
|
|
if (!cpumask_test_and_set_cpu(cpu, mm_cpumask(next)) || prev != next) {
|
|
check_context(next);
|
|
cpu_switch_mm(next);
|
|
}
|
|
}
|
|
|
|
#define deactivate_mm(tsk,mm) do { } while (0)
|
|
#define activate_mm(prev,next) switch_mm(prev, next, NULL)
|
|
|
|
#endif
|