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authorJohannes Weiner <jw@emlix.com>2009-03-04 16:21:31 +0100
committerChris Zankel <chris@zankel.net>2009-04-02 23:41:50 -0700
commite5083a63b6a8546c5fe1e571fe529e3939787ec2 (patch)
tree5c11db5b0a924f8bcfc404c202630d37ccfd7c3c /arch/xtensa/include/asm/pgtable.h
parent7789f89af9e8e426d7a7f173cf465a4fcadba7dd (diff)
xtensa: nommu support
Add support for !CONFIG_MMU setups. Signed-off-by: Johannes Weiner <jw@emlix.com> Signed-off-by: Chris Zankel <chris@zankel.net>
Diffstat (limited to 'arch/xtensa/include/asm/pgtable.h')
-rw-r--r--arch/xtensa/include/asm/pgtable.h13
1 files changed, 8 insertions, 5 deletions
diff --git a/arch/xtensa/include/asm/pgtable.h b/arch/xtensa/include/asm/pgtable.h
index 8014d96b21f..a138770c358 100644
--- a/arch/xtensa/include/asm/pgtable.h
+++ b/arch/xtensa/include/asm/pgtable.h
@@ -183,7 +183,15 @@ extern unsigned long empty_zero_page[1024];
#define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page))
+#ifdef CONFIG_MMU
extern pgd_t swapper_pg_dir[PAGE_SIZE/sizeof(pgd_t)];
+extern void paging_init(void);
+extern void pgtable_cache_init(void);
+#else
+# define swapper_pg_dir NULL
+static inline void paging_init(void) { }
+static inline void pgtable_cache_init(void) { }
+#endif
/*
* The pmd contains the kernel virtual address of the pte page.
@@ -383,8 +391,6 @@ ptep_set_wrprotect(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
#else
-extern void paging_init(void);
-
#define kern_addr_valid(addr) (1)
extern void update_mmu_cache(struct vm_area_struct * vma,
@@ -398,9 +404,6 @@ extern void update_mmu_cache(struct vm_area_struct * vma,
#define io_remap_pfn_range(vma,from,pfn,size,prot) \
remap_pfn_range(vma, from, pfn, size, prot)
-
-extern void pgtable_cache_init(void);
-
typedef pte_t *pte_addr_t;
#endif /* !defined (__ASSEMBLY__) */