1 files changed, 188 insertions, 0 deletions

diff --git a/include/asm-sparc64/pgalloc.h b/include/asm-sparc64/pgalloc.h
new file mode 100644
index 000000000000..2c28e1f605b7
--- /dev/null
+++ b/include/asm-sparc64/pgalloc.h
@@ -0,0 +1,188 @@
+/* $Id: pgalloc.h,v 1.30 2001/12/21 04:56:17 davem Exp $ */
+#ifndef _SPARC64_PGALLOC_H
+#define _SPARC64_PGALLOC_H
+
+#include <linux/config.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/mm.h>
+
+#include <asm/spitfire.h>
+#include <asm/cpudata.h>
+#include <asm/cacheflush.h>
+
+/* Page table allocation/freeing. */
+#ifdef CONFIG_SMP
+/* Sliiiicck */
+#define pgt_quicklists  local_cpu_data()
+#else
+extern struct pgtable_cache_struct {
+        unsigned long *pgd_cache;
+        unsigned long *pte_cache[2];
+        unsigned int pgcache_size;
+} pgt_quicklists;
+#endif
+#define pgd_quicklist           (pgt_quicklists.pgd_cache)
+#define pmd_quicklist           ((unsigned long *)0)
+#define pte_quicklist           (pgt_quicklists.pte_cache)
+#define pgtable_cache_size      (pgt_quicklists.pgcache_size)
+
+static __inline__ void free_pgd_fast(pgd_t *pgd)
+{
+        preempt_disable();
+        *(unsigned long *)pgd = (unsigned long) pgd_quicklist;
+        pgd_quicklist = (unsigned long *) pgd;
+        pgtable_cache_size++;
+        preempt_enable();
+}
+
+static __inline__ pgd_t *get_pgd_fast(void)
+{
+        unsigned long *ret;
+
+        preempt_disable();
+        if((ret = pgd_quicklist) != NULL) {
+                pgd_quicklist = (unsigned long *)(*ret);
+                ret[0] = 0;
+                pgtable_cache_size--;
+                preempt_enable();
+        } else {
+                preempt_enable();
+                ret = (unsigned long *) __get_free_page(GFP_KERNEL|__GFP_REPEAT);
+                if(ret)
+                        memset(ret, 0, PAGE_SIZE);
+        }
+        return (pgd_t *)ret;
+}
+
+static __inline__ void free_pgd_slow(pgd_t *pgd)
+{
+        free_page((unsigned long)pgd);
+}
+
+#ifdef DCACHE_ALIASING_POSSIBLE
+#define VPTE_COLOR(address)             (((address) >> (PAGE_SHIFT + 10)) & 1UL)
+#define DCACHE_COLOR(address)           (((address) >> PAGE_SHIFT) & 1UL)
+#else
+#define VPTE_COLOR(address)             0
+#define DCACHE_COLOR(address)           0
+#endif
+
+#define pud_populate(MM, PUD, PMD)      pud_set(PUD, PMD)
+
+static __inline__ pmd_t *pmd_alloc_one_fast(struct mm_struct *mm, unsigned long address)
+{
+        unsigned long *ret;
+        int color = 0;
+
+        preempt_disable();
+        if (pte_quicklist[color] == NULL)
+                color = 1;
+
+        if((ret = (unsigned long *)pte_quicklist[color]) != NULL) {
+                pte_quicklist[color] = (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 address)
+{
+        pmd_t *pmd;
+
+        pmd = pmd_alloc_one_fast(mm, address);
+        if (!pmd) {
+                pmd = (pmd_t *)__get_free_page(GFP_KERNEL|__GFP_REPEAT);
+                if (pmd)
+                        memset(pmd, 0, PAGE_SIZE);
+        }
+        return pmd;
+}
+
+static __inline__ void free_pmd_fast(pmd_t *pmd)
+{
+        unsigned long color = DCACHE_COLOR((unsigned long)pmd);
+
+        preempt_disable();
+        *(unsigned long *)pmd = (unsigned long) pte_quicklist[color];
+        pte_quicklist[color] = (unsigned long *) pmd;
+        pgtable_cache_size++;
+        preempt_enable();
+}
+
+static __inline__ void free_pmd_slow(pmd_t *pmd)
+{
+        free_page((unsigned long)pmd);
+}
+
+#define pmd_populate_kernel(MM, PMD, PTE)       pmd_set(PMD, PTE)
+#define pmd_populate(MM,PMD,PTE_PAGE)           \
+        pmd_populate_kernel(MM,PMD,page_address(PTE_PAGE))
+
+extern pte_t *__pte_alloc_one_kernel(struct mm_struct *mm, unsigned long address);
+
+static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm, unsigned long address)
+{
+        return __pte_alloc_one_kernel(mm, address);
+}
+
+static inline struct page *
+pte_alloc_one(struct mm_struct *mm, unsigned long addr)
+{
+        pte_t *pte = __pte_alloc_one_kernel(mm, addr);
+
+        if (pte)
+                return virt_to_page(pte);
+
+        return NULL;
+}
+
+static __inline__ pte_t *pte_alloc_one_fast(struct mm_struct *mm, unsigned long address)
+{
+        unsigned long color = VPTE_COLOR(address);
+        unsigned long *ret;
+
+        preempt_disable();
+        if((ret = (unsigned long *)pte_quicklist[color]) != NULL) {
+                pte_quicklist[color] = (unsigned long *)(*ret);
+                ret[0] = 0;
+                pgtable_cache_size--;
+        }
+        preempt_enable();
+        return (pte_t *)ret;
+}
+
+static __inline__ void free_pte_fast(pte_t *pte)
+{
+        unsigned long color = DCACHE_COLOR((unsigned long)pte);
+
+        preempt_disable();
+        *(unsigned long *)pte = (unsigned long) pte_quicklist[color];
+        pte_quicklist[color] = (unsigned long *) pte;
+        pgtable_cache_size++;
+        preempt_enable();
+}
+
+static __inline__ void free_pte_slow(pte_t *pte)
+{
+        free_page((unsigned long)pte);
+}
+
+static inline void pte_free_kernel(pte_t *pte)
+{
+        free_pte_fast(pte);
+}
+
+static inline void pte_free(struct page *ptepage)
+{
+        free_pte_fast(page_address(ptepage));
+}
+
+#define pmd_free(pmd)           free_pmd_fast(pmd)
+#define pgd_free(pgd)           free_pgd_fast(pgd)
+#define pgd_alloc(mm)           get_pgd_fast()
+
+#endif /* _SPARC64_PGALLOC_H */