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authorDavid Gibson <david@gibson.dropbear.id.au>2007-04-30 16:30:56 +1000
committerPaul Mackerras <paulus@samba.org>2007-05-02 20:04:30 +1000
commitf88df14b1f15cdeffa060580a40c1ce3e13bb79e (patch)
tree0619f32c2be79a85792537ad4410cc8d729f4f75 /include/asm-powerpc/pgalloc-64.h
parent69d48b409cac747cc0707b05b769e38488a6ad35 (diff)
[POWERPC] Remove arch/powerpc's dependence on asm-ppc/pg{alloc,table}.h
Currently, all 32-bit powerpc platforms use asm-ppc/pgtable.h and asm-ppc/pgalloc.h, even when otherwise compiled with ARCH=powerpc. Those asm-ppc files are a fairly nasty tangle of #ifdefs including a bunch of things which shouldn't be necessary any more in arch/powerpc. Cleaning up that mess is going to take a while, but this patch is a first step. It separates the asm-powerpc/pg{alloc,table}.h into 64 bit and 32 bit versions in asm-powerpc, which the basic .h files in asm-powerpc select based on config. We make a few tiny tweaks to the innards of the files along the way, making the outermost ifdefs (double-inclusion protection and __KERNEL__) a little cleaner, and #including asm-generic/pgtable.h from the top-level asm-powerpc/pgtable.h (since both the old 32-bit and 64-bit versions ended with such an #include). Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'include/asm-powerpc/pgalloc-64.h')
-rw-r--r--include/asm-powerpc/pgalloc-64.h152
1 files changed, 152 insertions, 0 deletions
diff --git a/include/asm-powerpc/pgalloc-64.h b/include/asm-powerpc/pgalloc-64.h
new file mode 100644
index 000000000000..30b50cf56e2c
--- /dev/null
+++ b/include/asm-powerpc/pgalloc-64.h
@@ -0,0 +1,152 @@
+#ifndef _ASM_POWERPC_PGALLOC_64_H
+#define _ASM_POWERPC_PGALLOC_64_H
+/*
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#include <linux/mm.h>
+#include <linux/slab.h>
+#include <linux/cpumask.h>
+#include <linux/percpu.h>
+
+extern struct kmem_cache *pgtable_cache[];
+
+#ifdef CONFIG_PPC_64K_PAGES
+#define PTE_CACHE_NUM 0
+#define PMD_CACHE_NUM 1
+#define PGD_CACHE_NUM 2
+#define HUGEPTE_CACHE_NUM 3
+#else
+#define PTE_CACHE_NUM 0
+#define PMD_CACHE_NUM 1
+#define PUD_CACHE_NUM 1
+#define PGD_CACHE_NUM 0
+#define HUGEPTE_CACHE_NUM 2
+#endif
+
+static inline pgd_t *pgd_alloc(struct mm_struct *mm)
+{
+ return kmem_cache_alloc(pgtable_cache[PGD_CACHE_NUM], GFP_KERNEL);
+}
+
+static inline void pgd_free(pgd_t *pgd)
+{
+ kmem_cache_free(pgtable_cache[PGD_CACHE_NUM], pgd);
+}
+
+#ifndef CONFIG_PPC_64K_PAGES
+
+#define pgd_populate(MM, PGD, PUD) pgd_set(PGD, PUD)
+
+static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long addr)
+{
+ return kmem_cache_alloc(pgtable_cache[PUD_CACHE_NUM],
+ GFP_KERNEL|__GFP_REPEAT);
+}
+
+static inline void pud_free(pud_t *pud)
+{
+ kmem_cache_free(pgtable_cache[PUD_CACHE_NUM], pud);
+}
+
+static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd)
+{
+ pud_set(pud, (unsigned long)pmd);
+}
+
+#define pmd_populate(mm, pmd, pte_page) \
+ pmd_populate_kernel(mm, pmd, page_address(pte_page))
+#define pmd_populate_kernel(mm, pmd, pte) pmd_set(pmd, (unsigned long)(pte))
+
+
+#else /* CONFIG_PPC_64K_PAGES */
+
+#define pud_populate(mm, pud, pmd) pud_set(pud, (unsigned long)pmd)
+
+static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd,
+ pte_t *pte)
+{
+ pmd_set(pmd, (unsigned long)pte);
+}
+
+#define pmd_populate(mm, pmd, pte_page) \
+ pmd_populate_kernel(mm, pmd, page_address(pte_page))
+
+#endif /* CONFIG_PPC_64K_PAGES */
+
+static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long addr)
+{
+ return kmem_cache_alloc(pgtable_cache[PMD_CACHE_NUM],
+ GFP_KERNEL|__GFP_REPEAT);
+}
+
+static inline void pmd_free(pmd_t *pmd)
+{
+ kmem_cache_free(pgtable_cache[PMD_CACHE_NUM], pmd);
+}
+
+static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
+ unsigned long address)
+{
+ return kmem_cache_alloc(pgtable_cache[PTE_CACHE_NUM],
+ GFP_KERNEL|__GFP_REPEAT);
+}
+
+static inline struct page *pte_alloc_one(struct mm_struct *mm,
+ unsigned long address)
+{
+ return virt_to_page(pte_alloc_one_kernel(mm, address));
+}
+
+static inline void pte_free_kernel(pte_t *pte)
+{
+ kmem_cache_free(pgtable_cache[PTE_CACHE_NUM], pte);
+}
+
+static inline void pte_free(struct page *ptepage)
+{
+ pte_free_kernel(page_address(ptepage));
+}
+
+#define PGF_CACHENUM_MASK 0x3
+
+typedef struct pgtable_free {
+ unsigned long val;
+} pgtable_free_t;
+
+static inline pgtable_free_t pgtable_free_cache(void *p, int cachenum,
+ unsigned long mask)
+{
+ BUG_ON(cachenum > PGF_CACHENUM_MASK);
+
+ return (pgtable_free_t){.val = ((unsigned long) p & ~mask) | cachenum};
+}
+
+static inline void pgtable_free(pgtable_free_t pgf)
+{
+ void *p = (void *)(pgf.val & ~PGF_CACHENUM_MASK);
+ int cachenum = pgf.val & PGF_CACHENUM_MASK;
+
+ kmem_cache_free(pgtable_cache[cachenum], p);
+}
+
+extern void pgtable_free_tlb(struct mmu_gather *tlb, pgtable_free_t pgf);
+
+#define __pte_free_tlb(tlb, ptepage) \
+ pgtable_free_tlb(tlb, pgtable_free_cache(page_address(ptepage), \
+ PTE_CACHE_NUM, PTE_TABLE_SIZE-1))
+#define __pmd_free_tlb(tlb, pmd) \
+ pgtable_free_tlb(tlb, pgtable_free_cache(pmd, \
+ PMD_CACHE_NUM, PMD_TABLE_SIZE-1))
+#ifndef CONFIG_PPC_64K_PAGES
+#define __pud_free_tlb(tlb, pud) \
+ pgtable_free_tlb(tlb, pgtable_free_cache(pud, \
+ PUD_CACHE_NUM, PUD_TABLE_SIZE-1))
+#endif /* CONFIG_PPC_64K_PAGES */
+
+#define check_pgt_cache() do { } while (0)
+
+#endif /* _ASM_POWERPC_PGALLOC_64_H */