/* TLB flushing routines.... */
-#include <linux/config.h>
#include <linux/mm.h>
+#include <linux/sched.h>
#include <asm/mmu_context.h>
+
+/* This is for the serialisation of PxTLB broadcasts. At least on the
+ * N class systems, only one PxTLB inter processor broadcast can be
+ * active at any one time on the Merced bus. This tlb purge
+ * synchronisation is fairly lightweight and harmless so we activate
+ * it on all SMP systems not just the N class. We also need to have
+ * preemption disabled on uniprocessor machines, and spin_lock does that
+ * nicely.
+ */
+extern spinlock_t pa_tlb_lock;
+
+#define purge_tlb_start(x) spin_lock(&pa_tlb_lock)
+#define purge_tlb_end(x) spin_unlock(&pa_tlb_lock)
+
extern void flush_tlb_all(void);
+extern void flush_tlb_all_local(void *);
/*
* flush_tlb_mm()
#endif
}
-extern __inline__ void flush_tlb_pgtables(struct mm_struct *mm, unsigned long start, unsigned long end)
-{
-}
-
static inline void flush_tlb_page(struct vm_area_struct *vma,
unsigned long addr)
{
purge_tlb_end();
}
-static inline void flush_tlb_range(struct vm_area_struct *vma,
- unsigned long start, unsigned long end)
-{
- unsigned long npages;
-
-
- npages = ((end - (start & PAGE_MASK)) + (PAGE_SIZE - 1)) >> PAGE_SHIFT;
- if (npages >= 512) /* XXX arbitrary, should be tuned */
- flush_tlb_all();
- else {
+void __flush_tlb_range(unsigned long sid,
+ unsigned long start, unsigned long end);
- mtsp(vma->vm_mm->context,1);
- if (split_tlb) {
- purge_tlb_start();
- while (npages--) {
- pdtlb(start);
- pitlb(start);
- start += PAGE_SIZE;
- }
- purge_tlb_end();
- } else {
- purge_tlb_start();
- while (npages--) {
- pdtlb(start);
- start += PAGE_SIZE;
- }
- purge_tlb_end();
- }
- }
-}
+#define flush_tlb_range(vma,start,end) __flush_tlb_range((vma)->vm_mm->context,start,end)
-#define flush_tlb_kernel_range(start, end) flush_tlb_all()
+#define flush_tlb_kernel_range(start, end) __flush_tlb_range(0,start,end)
#endif