Blackfin/ipipe: introduce support for CONFIG_MPU
Signed-off-by: Philippe Gerum <rpm@xenomai.org> Signed-off-by: Li Yi <yi.li@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
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@ -66,8 +66,8 @@ activate_l1stack(struct mm_struct *mm, unsigned long sp_base)
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#define activate_mm(prev, next) switch_mm(prev, next, NULL)
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static inline void switch_mm(struct mm_struct *prev_mm, struct mm_struct *next_mm,
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struct task_struct *tsk)
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static inline void __switch_mm(struct mm_struct *prev_mm, struct mm_struct *next_mm,
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struct task_struct *tsk)
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{
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#ifdef CONFIG_MPU
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unsigned int cpu = smp_processor_id();
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@ -95,7 +95,24 @@ static inline void switch_mm(struct mm_struct *prev_mm, struct mm_struct *next_m
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#endif
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}
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#ifdef CONFIG_IPIPE
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#define lock_mm_switch(flags) local_irq_save_hw_cond(flags)
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#define unlock_mm_switch(flags) local_irq_restore_hw_cond(flags)
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#else
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#define lock_mm_switch(flags) do { (void)(flags); } while (0)
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#define unlock_mm_switch(flags) do { (void)(flags); } while (0)
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#endif /* CONFIG_IPIPE */
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#ifdef CONFIG_MPU
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static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next,
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struct task_struct *tsk)
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{
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unsigned long flags;
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lock_mm_switch(flags);
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__switch_mm(prev, next, tsk);
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unlock_mm_switch(flags);
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}
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static inline void protect_page(struct mm_struct *mm, unsigned long addr,
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unsigned long flags)
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{
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@ -128,6 +145,12 @@ static inline void update_protections(struct mm_struct *mm)
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set_mask_dcplbs(mm->context.page_rwx_mask, cpu);
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}
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}
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#else /* !CONFIG_MPU */
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static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next,
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struct task_struct *tsk)
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{
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__switch_mm(prev, next, tsk);
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}
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#endif
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static inline void enter_lazy_tlb(struct mm_struct *mm, struct task_struct *tsk)
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@ -173,4 +196,10 @@ static inline void destroy_context(struct mm_struct *mm)
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#endif
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}
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#define ipipe_mm_switch_protect(flags) \
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local_irq_save_hw_cond(flags)
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#define ipipe_mm_switch_unprotect(flags) \
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local_irq_restore_hw_cond(flags)
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#endif
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