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authorAkira Takeuchi <takeuchi.akr@jp.panasonic.com>2010-10-27 20:28:51 +0400
committerDavid Howells <dhowells@redhat.com>2010-10-27 20:28:51 +0400
commit965ea4bbb9ae926358273368144ba838c561bc38 (patch)
treec6ee08f2f2970bb500ccc7cf58de6beea870e4f8 /arch/mn10300/include
parentdccbf4853a31a3f774f38c402209d23388d99f52 (diff)
downloadlinux-965ea4bbb9ae926358273368144ba838c561bc38.tar.xz
MN10300: SMP TLB flushing
Implement global TLB flushing for MN10300. This will be used by the AM34 which is SMP capable. Signed-off-by: Akira Takeuchi <takeuchi.akr@jp.panasonic.com> Signed-off-by: Kiyoshi Owada <owada.kiyoshi@jp.panasonic.com> Signed-off-by: David Howells <dhowells@redhat.com>
Diffstat (limited to 'arch/mn10300/include')
-rw-r--r--arch/mn10300/include/asm/mmu_context.h22
-rw-r--r--arch/mn10300/include/asm/tlbflush.h81
2 files changed, 74 insertions, 29 deletions
diff --git a/arch/mn10300/include/asm/mmu_context.h b/arch/mn10300/include/asm/mmu_context.h
index 5fb3648968ae..c8f6c82672ad 100644
--- a/arch/mn10300/include/asm/mmu_context.h
+++ b/arch/mn10300/include/asm/mmu_context.h
@@ -36,6 +36,22 @@
#define enter_lazy_tlb(mm, tsk) do {} while (0)
+static inline void cpu_ran_vm(int cpu, struct mm_struct *mm)
+{
+#ifdef CONFIG_SMP
+ cpumask_set_cpu(cpu, mm_cpumask(mm));
+#endif
+}
+
+static inline bool cpu_maybe_ran_vm(int cpu, struct mm_struct *mm)
+{
+#ifdef CONFIG_SMP
+ return cpumask_test_and_set_cpu(cpu, mm_cpumask(mm));
+#else
+ return true;
+#endif
+}
+
#ifdef CONFIG_MN10300_TLB_USE_PIDR
extern unsigned long mmu_context_cache[NR_CPUS];
#define mm_context(mm) (mm->context.tlbpid[smp_processor_id()])
@@ -127,7 +143,13 @@ static inline void activate_context(struct mm_struct *mm)
static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next,
struct task_struct *tsk)
{
+ int cpu = smp_processor_id();
+
if (prev != next) {
+#ifdef CONFIG_SMP
+ per_cpu(cpu_tlbstate, cpu).active_mm = next;
+#endif
+ cpu_ran_vm(cpu, next);
PTBR = (unsigned long) next->pgd;
activate_context(next);
}
diff --git a/arch/mn10300/include/asm/tlbflush.h b/arch/mn10300/include/asm/tlbflush.h
index c3c194d4031e..efddd6e1adea 100644
--- a/arch/mn10300/include/asm/tlbflush.h
+++ b/arch/mn10300/include/asm/tlbflush.h
@@ -11,6 +11,7 @@
#ifndef _ASM_TLBFLUSH_H
#define _ASM_TLBFLUSH_H
+#include <linux/mm.h>
#include <asm/processor.h>
struct tlb_state {
@@ -93,39 +94,61 @@ void local_flush_tlb_page(struct mm_struct *mm, unsigned long addr)
* - flush_tlb_range(mm, start, end) flushes a range of pages
* - flush_tlb_pgtables(mm, start, end) flushes a range of page tables
*/
-#define flush_tlb_all() \
-do { \
- preempt_disable(); \
- local_flush_tlb_all(); \
- preempt_enable(); \
-} while (0)
-
-#define flush_tlb_mm(mm) \
-do { \
- preempt_disable(); \
- local_flush_tlb_all(); \
- preempt_enable(); \
-} while (0)
-
-#define flush_tlb_range(vma, start, end) \
-do { \
- unsigned long __s __attribute__((unused)) = (start); \
- unsigned long __e __attribute__((unused)) = (end); \
- preempt_disable(); \
- local_flush_tlb_all(); \
- preempt_enable(); \
-} while (0)
+#ifdef CONFIG_SMP
+
+#include <asm/smp.h>
+
+extern void flush_tlb_all(void);
+extern void flush_tlb_current_task(void);
+extern void flush_tlb_mm(struct mm_struct *);
+extern void flush_tlb_page(struct vm_area_struct *, unsigned long);
+
+#define flush_tlb() flush_tlb_current_task()
+
+static inline void flush_tlb_range(struct vm_area_struct *vma,
+ unsigned long start, unsigned long end)
+{
+ flush_tlb_mm(vma->vm_mm);
+}
+
+#else /* CONFIG_SMP */
+
+static inline void flush_tlb_all(void)
+{
+ preempt_disable();
+ local_flush_tlb_all();
+ preempt_enable();
+}
+
+static inline void flush_tlb_mm(struct mm_struct *mm)
+{
+ preempt_disable();
+ local_flush_tlb_all();
+ preempt_enable();
+}
+
+static inline void flush_tlb_range(struct vm_area_struct *vma,
+ unsigned long start, unsigned long end)
+{
+ preempt_disable();
+ local_flush_tlb_all();
+ preempt_enable();
+}
#define flush_tlb_page(vma, addr) local_flush_tlb_page((vma)->vm_mm, addr)
#define flush_tlb() flush_tlb_all()
-#define flush_tlb_kernel_range(start, end) \
-do { \
- unsigned long __s __attribute__((unused)) = (start); \
- unsigned long __e __attribute__((unused)) = (end); \
- flush_tlb_all(); \
-} while (0)
+#endif /* CONFIG_SMP */
-#define flush_tlb_pgtables(mm, start, end) do {} while (0)
+static inline void flush_tlb_kernel_range(unsigned long start,
+ unsigned long end)
+{
+ flush_tlb_all();
+}
+
+static inline void flush_tlb_pgtables(struct mm_struct *mm,
+ unsigned long start, unsigned long end)
+{
+}
#endif /* _ASM_TLBFLUSH_H */