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, 78 insertions, 0 deletions

diff --git a/include/asm-arm26/tlb.h b/include/asm-arm26/tlb.h
new file mode 100644
index 000000000000..1316352a58f3
--- /dev/null
+++ b/include/asm-arm26/tlb.h
@@ -0,0 +1,78 @@
+#ifndef __ASMARM_TLB_H
+#define __ASMARM_TLB_H
+
+#include <asm/pgalloc.h>
+#include <asm/tlbflush.h>
+
+/*
+ * TLB handling.  This allows us to remove pages from the page
+ * tables, and efficiently handle the TLB issues.
+ */
+struct mmu_gather {
+        struct mm_struct        *mm;
+        unsigned int            freed;
+        unsigned int            fullmm;
+
+        unsigned int            flushes;
+        unsigned int            avoided_flushes;
+};
+
+extern struct mmu_gather mmu_gathers[NR_CPUS];
+
+static inline struct mmu_gather *
+tlb_gather_mmu(struct mm_struct *mm, unsigned int full_mm_flush)
+{
+        int cpu = smp_processor_id();
+        struct mmu_gather *tlb = &mmu_gathers[cpu];
+
+        tlb->mm = mm;
+        tlb->freed = 0;
+        tlb->fullmm = full_mm_flush;
+
+        return tlb;
+}
+
+static inline void
+tlb_finish_mmu(struct mmu_gather *tlb, unsigned long start, unsigned long end)
+{
+        struct mm_struct *mm = tlb->mm;
+        unsigned long freed = tlb->freed;
+        int rss = get_mm_counter(mm, rss);
+
+        if (rss < freed)
+                freed = rss;
+        add_mm_counter(mm, rss, -freed);
+
+        if (freed) {
+                flush_tlb_mm(mm);
+                tlb->flushes++;
+        } else {
+                tlb->avoided_flushes++;
+        }
+
+        /* keep the page table cache within bounds */
+        check_pgt_cache();
+}
+
+
+static inline unsigned int
+tlb_is_full_mm(struct mmu_gather *tlb)
+{
+     return tlb->fullmm;
+}
+
+#define tlb_remove_tlb_entry(tlb,ptep,address)  do { } while (0)
+//#define tlb_start_vma(tlb,vma)                  do { } while (0)
+//FIXME - ARM32 uses this now that things changed in the kernel. seems like it may be pointless on arm26, however to get things compiling...
+#define tlb_start_vma(tlb,vma)                                          \
+        do {                                                            \
+                if (!tlb->fullmm)                                       \
+                        flush_cache_range(vma, vma->vm_start, vma->vm_end); \
+        } while (0)
+#define tlb_end_vma(tlb,vma)                    do { } while (0)
+
+#define tlb_remove_page(tlb,page)       free_page_and_swap_cache(page)
+#define pte_free_tlb(tlb,ptep)          pte_free(ptep)
+#define pmd_free_tlb(tlb,pmdp)          pmd_free(pmdp)
+
+#endif