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!
diff --git a/include/asm-ia64/pgalloc.h b/include/asm-ia64/pgalloc.h
new file mode 100644
index 0000000..0f05dc8
--- /dev/null
+++ b/include/asm-ia64/pgalloc.h
@@ -0,0 +1,167 @@
+#ifndef _ASM_IA64_PGALLOC_H
+#define _ASM_IA64_PGALLOC_H
+
+/*
+ * This file contains the functions and defines necessary to allocate
+ * page tables.
+ *
+ * This hopefully works with any (fixed) ia-64 page-size, as defined
+ * in <asm/page.h> (currently 8192).
+ *
+ * Copyright (C) 1998-2001 Hewlett-Packard Co
+ * David Mosberger-Tang <davidm@hpl.hp.com>
+ * Copyright (C) 2000, Goutham Rao <goutham.rao@intel.com>
+ */
+
+#include <linux/config.h>
+
+#include <linux/compiler.h>
+#include <linux/mm.h>
+#include <linux/page-flags.h>
+#include <linux/threads.h>
+
+#include <asm/mmu_context.h>
+
+/*
+ * Very stupidly, we used to get new pgd's and pmd's, init their contents
+ * to point to the NULL versions of the next level page table, later on
+ * completely re-init them the same way, then free them up. This wasted
+ * a lot of work and caused unnecessary memory traffic. How broken...
+ * We fix this by caching them.
+ */
+#define pgd_quicklist (local_cpu_data->pgd_quick)
+#define pmd_quicklist (local_cpu_data->pmd_quick)
+#define pgtable_cache_size (local_cpu_data->pgtable_cache_sz)
+
+static inline pgd_t*
+pgd_alloc_one_fast (struct mm_struct *mm)
+{
+ unsigned long *ret = NULL;
+
+ preempt_disable();
+
+ ret = pgd_quicklist;
+ if (likely(ret != NULL)) {
+ pgd_quicklist = (unsigned long *)(*ret);
+ ret[0] = 0;
+ --pgtable_cache_size;
+ } else
+ ret = NULL;
+
+ preempt_enable();
+
+ return (pgd_t *) ret;
+}
+
+static inline pgd_t*
+pgd_alloc (struct mm_struct *mm)
+{
+ /* the VM system never calls pgd_alloc_one_fast(), so we do it here. */
+ pgd_t *pgd = pgd_alloc_one_fast(mm);
+
+ if (unlikely(pgd == NULL)) {
+ pgd = (pgd_t *)__get_free_page(GFP_KERNEL|__GFP_ZERO);
+ }
+ return pgd;
+}
+
+static inline void
+pgd_free (pgd_t *pgd)
+{
+ preempt_disable();
+ *(unsigned long *)pgd = (unsigned long) pgd_quicklist;
+ pgd_quicklist = (unsigned long *) pgd;
+ ++pgtable_cache_size;
+ preempt_enable();
+}
+
+static inline void
+pud_populate (struct mm_struct *mm, pud_t *pud_entry, pmd_t *pmd)
+{
+ pud_val(*pud_entry) = __pa(pmd);
+}
+
+static inline pmd_t*
+pmd_alloc_one_fast (struct mm_struct *mm, unsigned long addr)
+{
+ unsigned long *ret = NULL;
+
+ preempt_disable();
+
+ ret = (unsigned long *)pmd_quicklist;
+ if (likely(ret != NULL)) {
+ pmd_quicklist = (unsigned long *)(*ret);
+ ret[0] = 0;
+ --pgtable_cache_size;
+ }
+
+ preempt_enable();
+
+ return (pmd_t *)ret;
+}
+
+static inline pmd_t*
+pmd_alloc_one (struct mm_struct *mm, unsigned long addr)
+{
+ pmd_t *pmd = (pmd_t *)__get_free_page(GFP_KERNEL|__GFP_REPEAT|__GFP_ZERO);
+
+ return pmd;
+}
+
+static inline void
+pmd_free (pmd_t *pmd)
+{
+ preempt_disable();
+ *(unsigned long *)pmd = (unsigned long) pmd_quicklist;
+ pmd_quicklist = (unsigned long *) pmd;
+ ++pgtable_cache_size;
+ preempt_enable();
+}
+
+#define __pmd_free_tlb(tlb, pmd) pmd_free(pmd)
+
+static inline void
+pmd_populate (struct mm_struct *mm, pmd_t *pmd_entry, struct page *pte)
+{
+ pmd_val(*pmd_entry) = page_to_phys(pte);
+}
+
+static inline void
+pmd_populate_kernel (struct mm_struct *mm, pmd_t *pmd_entry, pte_t *pte)
+{
+ pmd_val(*pmd_entry) = __pa(pte);
+}
+
+static inline struct page *
+pte_alloc_one (struct mm_struct *mm, unsigned long addr)
+{
+ struct page *pte = alloc_pages(GFP_KERNEL|__GFP_REPEAT|__GFP_ZERO, 0);
+
+ return pte;
+}
+
+static inline pte_t *
+pte_alloc_one_kernel (struct mm_struct *mm, unsigned long addr)
+{
+ pte_t *pte = (pte_t *)__get_free_page(GFP_KERNEL|__GFP_REPEAT|__GFP_ZERO);
+
+ return pte;
+}
+
+static inline void
+pte_free (struct page *pte)
+{
+ __free_page(pte);
+}
+
+static inline void
+pte_free_kernel (pte_t *pte)
+{
+ free_page((unsigned long) pte);
+}
+
+#define __pte_free_tlb(tlb, pte) tlb_remove_page((tlb), (pte))
+
+extern void check_pgt_cache (void);
+
+#endif /* _ASM_IA64_PGALLOC_H */