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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>
This commit is contained in:
Philippe Gerum 2009-10-27 22:05:33 +01:00 committed by Mike Frysinger
parent 7d4a005c43
commit 4815b883ed
1 changed files with 31 additions and 2 deletions
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33
arch/blackfin/include/asm/mmu_context.h
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@ -66,8 +66,8 @@ activate_l1stack(struct mm_struct *mm, unsigned long sp_base)
#define activate_mm(prev, next) switch_mm(prev, next, NULL)
static inline void switch_mm(struct mm_struct *prev_mm, struct mm_struct *next_mm,
struct task_struct *tsk)
static inline void __switch_mm(struct mm_struct *prev_mm, struct mm_struct *next_mm,
struct task_struct *tsk)
{
#ifdef CONFIG_MPU
unsigned int cpu = smp_processor_id();
@ -95,7 +95,24 @@ static inline void switch_mm(struct mm_struct *prev_mm, struct mm_struct *next_m
#endif
}
#ifdef CONFIG_IPIPE
#define lock_mm_switch(flags) local_irq_save_hw_cond(flags)
#define unlock_mm_switch(flags) local_irq_restore_hw_cond(flags)
#else
#define lock_mm_switch(flags) do { (void)(flags); } while (0)
#define unlock_mm_switch(flags) do { (void)(flags); } while (0)
#endif /* CONFIG_IPIPE */
#ifdef CONFIG_MPU
static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next,
struct task_struct *tsk)
{
unsigned long flags;
lock_mm_switch(flags);
__switch_mm(prev, next, tsk);
unlock_mm_switch(flags);
}
static inline void protect_page(struct mm_struct *mm, unsigned long addr,
unsigned long flags)
{
@ -128,6 +145,12 @@ static inline void update_protections(struct mm_struct *mm)
set_mask_dcplbs(mm->context.page_rwx_mask, cpu);
}
}
#else /* !CONFIG_MPU */
static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next,
struct task_struct *tsk)
{
__switch_mm(prev, next, tsk);
}
#endif
static inline void enter_lazy_tlb(struct mm_struct *mm, struct task_struct *tsk)
@ -173,4 +196,10 @@ static inline void destroy_context(struct mm_struct *mm)
#endif
}
#define ipipe_mm_switch_protect(flags) \
local_irq_save_hw_cond(flags)
#define ipipe_mm_switch_unprotect(flags) \
local_irq_restore_hw_cond(flags)
#endif