[Xen-changelog] [IA64] dom0 vp model linux part: import pgalloc.h from linux-2.6.16-rc3

[Xen patchbot -unstable <patchbot-unstable@xxxxxxxxxxxxxxxxxxx>]

# HG changeset patch
# User awilliam@xxxxxxxxxxx
# Node ID e311941eb7bef5cea2fb6c13200571cfa855d8cf
# Parent  aab421b5ad452a3ab13e1a46bf5135f3885437a6
[IA64] dom0 vp model linux part: import pgalloc.h from linux-2.6.16-rc3

[note: verified same as linux-2.6.16]

Signed-off-by: Isaku Yamahata <yamahata@xxxxxxxxxxxxx>

diff -r aab421b5ad45 -r e311941eb7be 
linux-2.6-xen-sparse/include/asm-ia64/pgalloc.h
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/linux-2.6-xen-sparse/include/asm-ia64/pgalloc.h   Fri Apr 07 14:02:31 
2006 -0600
@@ -0,0 +1,164 @@
+#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@xxxxxxxxxx>
+ * Copyright (C) 2000, Goutham Rao <goutham.rao@xxxxxxxxx>
+ */
+
+#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>
+
+DECLARE_PER_CPU(unsigned long *, __pgtable_quicklist);
+#define pgtable_quicklist __ia64_per_cpu_var(__pgtable_quicklist)
+DECLARE_PER_CPU(long, __pgtable_quicklist_size);
+#define pgtable_quicklist_size __ia64_per_cpu_var(__pgtable_quicklist_size)
+
+static inline long pgtable_quicklist_total_size(void)
+{
+       long ql_size = 0;
+       int cpuid;
+
+       for_each_online_cpu(cpuid) {
+               ql_size += per_cpu(__pgtable_quicklist_size, cpuid);
+       }
+       return ql_size;
+}
+
+static inline void *pgtable_quicklist_alloc(void)
+{
+       unsigned long *ret = NULL;
+
+       preempt_disable();
+
+       ret = pgtable_quicklist;
+       if (likely(ret != NULL)) {
+               pgtable_quicklist = (unsigned long *)(*ret);
+               ret[0] = 0;
+               --pgtable_quicklist_size;
+               preempt_enable();
+       } else {
+               preempt_enable();
+               ret = (unsigned long *)__get_free_page(GFP_KERNEL | __GFP_ZERO);
+       }
+
+       return ret;
+}
+
+static inline void pgtable_quicklist_free(void *pgtable_entry)
+{
+#ifdef CONFIG_NUMA
+       unsigned long nid = page_to_nid(virt_to_page(pgtable_entry));
+
+       if (unlikely(nid != numa_node_id())) {
+               free_page((unsigned long)pgtable_entry);
+               return;
+       }
+#endif
+
+       preempt_disable();
+       *(unsigned long *)pgtable_entry = (unsigned long)pgtable_quicklist;
+       pgtable_quicklist = (unsigned long *)pgtable_entry;
+       ++pgtable_quicklist_size;
+       preempt_enable();
+}
+
+static inline pgd_t *pgd_alloc(struct mm_struct *mm)
+{
+       return pgtable_quicklist_alloc();
+}
+
+static inline void pgd_free(pgd_t * pgd)
+{
+       pgtable_quicklist_free(pgd);
+}
+
+#ifdef CONFIG_PGTABLE_4
+static inline void
+pgd_populate(struct mm_struct *mm, pgd_t * pgd_entry, pud_t * pud)
+{
+       pgd_val(*pgd_entry) = __pa(pud);
+}
+
+static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long addr)
+{
+       return pgtable_quicklist_alloc();
+}
+
+static inline void pud_free(pud_t * pud)
+{
+       pgtable_quicklist_free(pud);
+}
+#define __pud_free_tlb(tlb, pud)       pud_free(pud)
+#endif /* CONFIG_PGTABLE_4 */
+
+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(struct mm_struct *mm, unsigned long addr)
+{
+       return pgtable_quicklist_alloc();
+}
+
+static inline void pmd_free(pmd_t * pmd)
+{
+       pgtable_quicklist_free(pmd);
+}
+
+#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)
+{
+       return virt_to_page(pgtable_quicklist_alloc());
+}
+
+static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
+                                         unsigned long addr)
+{
+       return pgtable_quicklist_alloc();
+}
+
+static inline void pte_free(struct page *pte)
+{
+       pgtable_quicklist_free(page_address(pte));
+}
+
+static inline void pte_free_kernel(pte_t * pte)
+{
+       pgtable_quicklist_free(pte);
+}
+
+#define __pte_free_tlb(tlb, pte)       pte_free(pte)
+
+extern void check_pgt_cache(void);
+
+#endif                         /* _ASM_IA64_PGALLOC_H */

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