Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 128 insertions, 0 deletions

diff --git a/include/asm-sparc64/tlb.h b/include/asm-sparc64/tlb.h
new file mode 100644
index 000000000000..9baf57db01d2
--- /dev/null
+++ b/include/asm-sparc64/tlb.h
@@ -0,0 +1,128 @@
+#ifndef _SPARC64_TLB_H
+#define _SPARC64_TLB_H
+
+#include <linux/config.h>
+#include <linux/swap.h>
+#include <asm/pgalloc.h>
+#include <asm/tlbflush.h>
+#include <asm/mmu_context.h>
+
+#define TLB_BATCH_NR    192
+
+/*
+ * For UP we don't need to worry about TLB flush
+ * and page free order so much..
+ */
+#ifdef CONFIG_SMP
+  #define FREE_PTE_NR   506
+  #define tlb_fast_mode(bp) ((bp)->pages_nr == ~0U)
+#else
+  #define FREE_PTE_NR   1
+  #define tlb_fast_mode(bp) 1
+#endif
+
+struct mmu_gather {
+        struct mm_struct *mm;
+        unsigned int pages_nr;
+        unsigned int need_flush;
+        unsigned int tlb_frozen;
+        unsigned int tlb_nr;
+        unsigned long freed;
+        unsigned long vaddrs[TLB_BATCH_NR];
+        struct page *pages[FREE_PTE_NR];
+};
+
+DECLARE_PER_CPU(struct mmu_gather, mmu_gathers);
+
+#ifdef CONFIG_SMP
+extern void smp_flush_tlb_pending(struct mm_struct *,
+                                  unsigned long, unsigned long *);
+#endif
+
+extern void __flush_tlb_pending(unsigned long, unsigned long, unsigned long *);
+extern void flush_tlb_pending(void);
+
+static inline struct mmu_gather *tlb_gather_mmu(struct mm_struct *mm, unsigned int full_mm_flush)
+{
+        struct mmu_gather *mp = &__get_cpu_var(mmu_gathers);
+
+        BUG_ON(mp->tlb_nr);
+
+        mp->mm = mm;
+        mp->pages_nr = num_online_cpus() > 1 ? 0U : ~0U;
+        mp->tlb_frozen = full_mm_flush;
+        mp->freed = 0;
+
+        return mp;
+}
+
+
+static inline void tlb_flush_mmu(struct mmu_gather *mp)
+{
+        if (mp->need_flush) {
+                mp->need_flush = 0;
+                if (!tlb_fast_mode(mp)) {
+                        free_pages_and_swap_cache(mp->pages, mp->pages_nr);
+                        mp->pages_nr = 0;
+                }
+        }
+
+}
+
+#ifdef CONFIG_SMP
+extern void smp_flush_tlb_mm(struct mm_struct *mm);
+#define do_flush_tlb_mm(mm) smp_flush_tlb_mm(mm)
+#else
+#define do_flush_tlb_mm(mm) __flush_tlb_mm(CTX_HWBITS(mm->context), SECONDARY_CONTEXT)
+#endif
+
+static inline void tlb_finish_mmu(struct mmu_gather *mp, unsigned long start, unsigned long end)
+{
+        unsigned long freed = mp->freed;
+        struct mm_struct *mm = mp->mm;
+        unsigned long rss = get_mm_counter(mm, rss);
+
+        if (rss < freed)
+                freed = rss;
+        add_mm_counter(mm, rss, -freed);
+
+        tlb_flush_mmu(mp);
+
+        if (mp->tlb_frozen) {
+                if (CTX_VALID(mm->context))
+                        do_flush_tlb_mm(mm);
+                mp->tlb_frozen = 0;
+        } else
+                flush_tlb_pending();
+
+        /* keep the page table cache within bounds */
+        check_pgt_cache();
+}
+
+static inline unsigned int tlb_is_full_mm(struct mmu_gather *mp)
+{
+        return mp->tlb_frozen;
+}
+
+static inline void tlb_remove_page(struct mmu_gather *mp, struct page *page)
+{
+        mp->need_flush = 1;
+        if (tlb_fast_mode(mp)) {
+                free_page_and_swap_cache(page);
+                return;
+        }
+        mp->pages[mp->pages_nr++] = page;
+        if (mp->pages_nr >= FREE_PTE_NR)
+                tlb_flush_mmu(mp);
+}
+
+#define tlb_remove_tlb_entry(mp,ptep,addr) do { } while (0)
+#define pte_free_tlb(mp,ptepage) pte_free(ptepage)
+#define pmd_free_tlb(mp,pmdp) pmd_free(pmdp)
+#define pud_free_tlb(tlb,pudp) __pud_free_tlb(tlb,pudp)
+
+#define tlb_migrate_finish(mm)  do { } while (0)
+#define tlb_start_vma(tlb, vma) do { } while (0)
+#define tlb_end_vma(tlb, vma)   do { } while (0)
+
+#endif /* _SPARC64_TLB_H */