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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>
This commit is contained in:
Greg Ungerer 2011-10-14 16:21:31 +10:00
parent 91521c2ea6
commit 813db7fc15
1 changed files with 24 additions and 6 deletions
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30
arch/m68k/include/asm/pgtable_mm.h
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@ -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__ */