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>
diff --git a/arch/blackfin/include/asm/mmu_context.h b/arch/blackfin/include/asm/mmu_context.h
index 4a3be37..ae8ef4f 100644
--- a/arch/blackfin/include/asm/mmu_context.h
+++ b/arch/blackfin/include/asm/mmu_context.h
@@ -66,8 +66,8 @@
#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 @@
#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 @@
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 @@
#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