[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>

1 files changed, 3 insertions, 151 deletions

diff --git a/include/asm-powerpc/pgalloc.h b/include/asm-powerpc/pgalloc.h
index b0830db68f8..b4505ed0f0f 100644
--- a/include/asm-powerpc/pgalloc.h
+++ b/include/asm-powerpc/pgalloc.h
@@ -2,159 +2,11 @@
 #define _ASM_POWERPC_PGALLOC_H
 #ifdef __KERNEL__
 
-#ifndef CONFIG_PPC64
-#include <asm-ppc/pgalloc.h>
+#ifdef CONFIG_PPC64
+#include <asm/pgalloc-64.h>
 #else
-
-#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
+#include <asm/pgalloc-32.h>
 #endif
 
-/*
- * 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.
- */
-
-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 /* CONFIG_PPC64 */
 #endif /* __KERNEL__ */
 #endif /* _ASM_POWERPC_PGALLOC_H */