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authorDavid Gibson <david@gibson.dropbear.id.au>2007-05-08 12:46:49 +1000
committerPaul Mackerras <paulus@samba.org>2007-05-08 13:40:31 +1000
commitd1953c8888ef034b912ee33bc2ea2cce6a414402 (patch)
tree525e581603a2dd8622b821304440b6ce14b535ae /include
parent00c2ae35bd50664bcd841becc6efceef8aa5d074 (diff)
downloadop-kernel-dev-d1953c8888ef034b912ee33bc2ea2cce6a414402.zip
op-kernel-dev-d1953c8888ef034b912ee33bc2ea2cce6a414402.tar.gz
[POWERPC] Remove use of 4level-fixup.h for ppc32
For 32-bit systems, powerpc still relies on the 4level-fixup.h hack, to pretend that the generic pagetable handling stuff is 3-levels rather than 4. This patch removes this, instead using the newer pgtable-nopmd.h to handle the elision of both the pud and pmd pagetable levels (ppc32 pagetables are actually 2 levels). This removes a little extraneous code, and makes it more easily compared to the 64-bit pagetable code. Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'include')
-rw-r--r--include/asm-powerpc/page.h12
-rw-r--r--include/asm-powerpc/pgalloc-32.h4
-rw-r--r--include/asm-powerpc/pgtable-ppc32.h30
3 files changed, 12 insertions, 34 deletions
diff --git a/include/asm-powerpc/page.h b/include/asm-powerpc/page.h
index f37bff0..10c51f4 100644
--- a/include/asm-powerpc/page.h
+++ b/include/asm-powerpc/page.h
@@ -121,16 +121,18 @@ typedef struct { pte_t pte; } real_pte_t;
#endif
/* PMD level */
+#ifdef CONFIG_PPC64
typedef struct { unsigned long pmd; } pmd_t;
#define pmd_val(x) ((x).pmd)
#define __pmd(x) ((pmd_t) { (x) })
/* PUD level exusts only on 4k pages */
-#if defined(CONFIG_PPC64) && !defined(CONFIG_PPC_64K_PAGES)
+#ifndef CONFIG_PPC_64K_PAGES
typedef struct { unsigned long pud; } pud_t;
#define pud_val(x) ((x).pud)
#define __pud(x) ((pud_t) { (x) })
-#endif
+#endif /* !CONFIG_PPC_64K_PAGES */
+#endif /* CONFIG_PPC64 */
/* PGD level */
typedef struct { unsigned long pgd; } pgd_t;
@@ -159,15 +161,17 @@ typedef unsigned long real_pte_t;
#endif
+#ifdef CONFIG_PPC64
typedef unsigned long pmd_t;
#define pmd_val(x) (x)
#define __pmd(x) (x)
-#if defined(CONFIG_PPC64) && !defined(CONFIG_PPC_64K_PAGES)
+#ifndef CONFIG_PPC_64K_PAGES
typedef unsigned long pud_t;
#define pud_val(x) (x)
#define __pud(x) (x)
-#endif
+#endif /* !CONFIG_PPC_64K_PAGES */
+#endif /* CONFIG_PPC64 */
typedef unsigned long pgd_t;
#define pgd_val(x) (x)
diff --git a/include/asm-powerpc/pgalloc-32.h b/include/asm-powerpc/pgalloc-32.h
index 235aef2..e130743 100644
--- a/include/asm-powerpc/pgalloc-32.h
+++ b/include/asm-powerpc/pgalloc-32.h
@@ -12,10 +12,10 @@ extern void pgd_free(pgd_t *pgd);
* We don't have any real pmd's, and this code never triggers because
* the pgd will always be present..
*/
-#define pmd_alloc_one(mm,address) ({ BUG(); ((pmd_t *)2); })
+/* #define pmd_alloc_one(mm,address) ({ BUG(); ((pmd_t *)2); }) */
#define pmd_free(x) do { } while (0)
#define __pmd_free_tlb(tlb,x) do { } while (0)
-#define pgd_populate(mm, pmd, pte) BUG()
+/* #define pgd_populate(mm, pmd, pte) BUG() */
#ifndef CONFIG_BOOKE
#define pmd_populate_kernel(mm, pmd, pte) \
diff --git a/include/asm-powerpc/pgtable-ppc32.h b/include/asm-powerpc/pgtable-ppc32.h
index e704640..09662a2 100644
--- a/include/asm-powerpc/pgtable-ppc32.h
+++ b/include/asm-powerpc/pgtable-ppc32.h
@@ -1,7 +1,7 @@
#ifndef _ASM_POWERPC_PGTABLE_PPC32_H
#define _ASM_POWERPC_PGTABLE_PPC32_H
-#include <asm-generic/4level-fixup.h>
+#include <asm-generic/pgtable-nopmd.h>
#ifndef __ASSEMBLY__
#include <linux/sched.h>
@@ -76,13 +76,8 @@ extern unsigned long ioremap_bot, ioremap_base;
* level has 2048 entries and the second level has 512 64-bit PTE entries.
* -Matt
*/
-/* PMD_SHIFT determines the size of the area mapped by the PTE pages */
-#define PMD_SHIFT (PAGE_SHIFT + PTE_SHIFT)
-#define PMD_SIZE (1UL << PMD_SHIFT)
-#define PMD_MASK (~(PMD_SIZE-1))
-
/* PGDIR_SHIFT determines what a top-level page table entry can map */
-#define PGDIR_SHIFT PMD_SHIFT
+#define PGDIR_SHIFT (PAGE_SHIFT + PTE_SHIFT)
#define PGDIR_SIZE (1UL << PGDIR_SHIFT)
#define PGDIR_MASK (~(PGDIR_SIZE-1))
@@ -103,8 +98,6 @@ extern unsigned long ioremap_bot, ioremap_base;
#define pte_ERROR(e) \
printk("%s:%d: bad pte %llx.\n", __FILE__, __LINE__, \
(unsigned long long)pte_val(e))
-#define pmd_ERROR(e) \
- printk("%s:%d: bad pmd %08lx.\n", __FILE__, __LINE__, pmd_val(e))
#define pgd_ERROR(e) \
printk("%s:%d: bad pgd %08lx.\n", __FILE__, __LINE__, pgd_val(e))
@@ -516,19 +509,6 @@ extern unsigned long empty_zero_page[1024];
#ifndef __ASSEMBLY__
/*
- * The "pgd_xxx()" functions here are trivial for a folded two-level
- * setup: the pgd is never bad, and a pmd always exists (as it's folded
- * into the pgd entry)
- */
-static inline int pgd_none(pgd_t pgd) { return 0; }
-static inline int pgd_bad(pgd_t pgd) { return 0; }
-static inline int pgd_present(pgd_t pgd) { return 1; }
-#define pgd_clear(xp) do { } while (0)
-
-#define pgd_page_vaddr(pgd) \
- ((unsigned long) __va(pgd_val(pgd) & PAGE_MASK))
-
-/*
* The following only work if pte_present() is true.
* Undefined behaviour if not..
*/
@@ -737,12 +717,6 @@ extern pgprot_t phys_mem_access_prot(struct file *file, unsigned long pfn,
#define pgd_index(address) ((address) >> PGDIR_SHIFT)
#define pgd_offset(mm, address) ((mm)->pgd + pgd_index(address))
-/* Find an entry in the second-level page table.. */
-static inline pmd_t * pmd_offset(pgd_t * dir, unsigned long address)
-{
- return (pmd_t *) dir;
-}
-
/* Find an entry in the third-level page table.. */
#define pte_index(address) \
(((address) >> PAGE_SHIFT) & (PTRS_PER_PTE - 1))
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