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| author | Philippe Gerum <rpm@xenomai.org> | 2009-10-27 22:05:33 +0100 |
|---|---|---|
| committer | Mike Frysinger <vapier@gentoo.org> | 2009-12-15 06:15:18 +0100 |
| commit | 4815b883edeb0dd0d1997aae078f18c92da9b6b8 (patch) | |
| tree | 71836df8403426344cf9d8b219fdcde8a4ba60a2 | |
| parent | Blackfin/ipipe: fix forward ref to barrier() (diff) | |
| download | linux-4815b883edeb0dd0d1997aae078f18c92da9b6b8.tar.xz linux-4815b883edeb0dd0d1997aae078f18c92da9b6b8.zip | |
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>
| -rw-r--r-- | arch/blackfin/include/asm/mmu_context.h | 33 |
1 files changed, 31 insertions, 2 deletions
diff --git a/arch/blackfin/include/asm/mmu_context.h b/arch/blackfin/include/asm/mmu_context.h index 4a3be376ad5b..ae8ef4ffd806 100644 --- a/arch/blackfin/include/asm/mmu_context.h +++ b/arch/blackfin/include/asm/mmu_context.h @@ -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 |