m68k: add page table size definitions for ColdFire V4e MMU

Define the page table size and attributes for the ColdFire V4e MMU.
Also setup the vmalloc and kmap regions we will use.

Signed-off-by: Greg Ungerer <gerg@uclinux.org>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Acked-by: Matt Waddel <mwaddel@yahoo.com>
Acked-by: Kurt Mahan <kmahan@xmission.com>

diff --git a/arch/m68k/include/asm/pgtable_mm.h b/arch/m68k/include/asm/pgtable_mm.h
index 87174c904d2b2e8eb5adc83a4fc056ac8790a9cc..dc35e0e106e4b1d9c3aa817248f7a642796891af 100644 (file)
--- a/arch/m68k/include/asm/pgtable_mm.h
+++ b/arch/m68k/include/asm/pgtable_mm.h
@@ -40,6 +40,8 @@
 /* PGDIR_SHIFT determines what a third-level page table entry can map */
 #ifdef CONFIG_SUN3
 #define PGDIR_SHIFT     17
+#elif defined(CONFIG_COLDFIRE)
+#define PGDIR_SHIFT     22
 #else
 #define PGDIR_SHIFT    25
 #endif
@@ -54,6 +56,10 @@
 #define PTRS_PER_PTE   16
 #define PTRS_PER_PMD   1
 #define PTRS_PER_PGD   2048
+#elif defined(CONFIG_COLDFIRE)
+#define PTRS_PER_PTE   512
+#define PTRS_PER_PMD   1
+#define PTRS_PER_PGD   1024
 #else
 #define PTRS_PER_PTE   1024
 #define PTRS_PER_PMD   8
@@ -66,12 +72,22 @@
 #ifdef CONFIG_SUN3
 #define KMAP_START     0x0DC00000
 #define KMAP_END       0x0E000000
+#elif defined(CONFIG_COLDFIRE)
+#define KMAP_START     0xe0000000
+#define KMAP_END       0xf0000000
 #else
 #define        KMAP_START      0xd0000000
 #define        KMAP_END        0xf0000000
 #endif
 
-#ifndef CONFIG_SUN3
+#ifdef CONFIG_SUN3
+extern unsigned long m68k_vmalloc_end;
+#define VMALLOC_START 0x0f800000
+#define VMALLOC_END m68k_vmalloc_end
+#elif defined(CONFIG_COLDFIRE)
+#define VMALLOC_START  0xd0000000
+#define VMALLOC_END    0xe0000000
+#else
 /* Just any arbitrary offset to the start of the vmalloc VM area: the
  * current 8MB value just means that there will be a 8MB "hole" after the
  * physical memory until the kernel virtual memory starts.  That means that
@@ -82,11 +98,7 @@
 #define VMALLOC_OFFSET (8*1024*1024)
 #define VMALLOC_START (((unsigned long) high_memory + VMALLOC_OFFSET) & ~(VMALLOC_OFFSET-1))
 #define VMALLOC_END KMAP_START
-#else
-extern unsigned long m68k_vmalloc_end;
-#define VMALLOC_START 0x0f800000
-#define VMALLOC_END m68k_vmalloc_end
-#endif /* CONFIG_SUN3 */
+#endif
 
 /* zero page used for uninitialized stuff */
 extern void *empty_zero_page;
@@ -130,6 +142,8 @@ static inline void update_mmu_cache(struct vm_area_struct *vma,
 
 #ifdef CONFIG_SUN3
 #include <asm/sun3_pgtable.h>
+#elif defined(CONFIG_COLDFIRE)
+#include <asm/mcf_pgtable.h>
 #else
 #include <asm/motorola_pgtable.h>
 #endif
@@ -138,6 +152,9 @@ static inline void update_mmu_cache(struct vm_area_struct *vma,
 /*
  * Macro to mark a page protection value as "uncacheable".
  */
+#ifdef CONFIG_COLDFIRE
+# define pgprot_noncached(prot) (__pgprot(pgprot_val(prot) | CF_PAGE_NOCACHE))
+#else
 #ifdef SUN3_PAGE_NOCACHE
 # define __SUN3_PAGE_NOCACHE   SUN3_PAGE_NOCACHE
 #else
@@ -152,6 +169,7 @@ static inline void update_mmu_cache(struct vm_area_struct *vma,
            ? (__pgprot((pgprot_val(prot) & _CACHEMASK040) | _PAGE_NOCACHE_S))  \
            : (prot)))
 
+#endif /* CONFIG_COLDFIRE */
 #include <asm-generic/pgtable.h>
 #endif /* !__ASSEMBLY__ */