From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Mon Sep 17 00:00:00 2001
From: Linus Torvalds <torvalds@ppc970.osdl.org>
Date: Sat, 16 Apr 2005 15:20:36 -0700
Subject: Linux-2.6.12-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!
---
 include/asm-sparc64/tlb.h | 128 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 128 insertions(+)
 create mode 100644 include/asm-sparc64/tlb.h

(limited to 'include/asm-sparc64/tlb.h')

diff --git a/include/asm-sparc64/tlb.h b/include/asm-sparc64/tlb.h
new file mode 100644
index 00000000000..9baf57db01d
--- /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 */
-- 
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