7b892806b0
After the APUS removal, some code can be removed. Signed-off-by: Adrian Bunk <bunk@kernel.org> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> Cc: Karsten Keil <kkeil@suse.de> Cc: James Bottomley <James.Bottomley@steeleye.com> Cc: "Antonino A. Daplas" <adaplas@pol.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
167 lines
4.3 KiB
C
167 lines
4.3 KiB
C
#ifndef _M68K_PGTABLE_H
|
|
#define _M68K_PGTABLE_H
|
|
|
|
#include <asm-generic/4level-fixup.h>
|
|
|
|
#include <asm/setup.h>
|
|
|
|
#ifndef __ASSEMBLY__
|
|
#include <asm/processor.h>
|
|
#include <linux/sched.h>
|
|
#include <linux/threads.h>
|
|
|
|
/*
|
|
* This file contains the functions and defines necessary to modify and use
|
|
* the m68k page table tree.
|
|
*/
|
|
|
|
#include <asm/virtconvert.h>
|
|
|
|
/* Certain architectures need to do special things when pte's
|
|
* within a page table are directly modified. Thus, the following
|
|
* hook is made available.
|
|
*/
|
|
#define set_pte(pteptr, pteval) \
|
|
do{ \
|
|
*(pteptr) = (pteval); \
|
|
} while(0)
|
|
#define set_pte_at(mm,addr,ptep,pteval) set_pte(ptep,pteval)
|
|
|
|
|
|
/* PMD_SHIFT determines the size of the area a second-level page table can map */
|
|
#ifdef CONFIG_SUN3
|
|
#define PMD_SHIFT 17
|
|
#else
|
|
#define PMD_SHIFT 22
|
|
#endif
|
|
#define PMD_SIZE (1UL << PMD_SHIFT)
|
|
#define PMD_MASK (~(PMD_SIZE-1))
|
|
|
|
/* PGDIR_SHIFT determines what a third-level page table entry can map */
|
|
#ifdef CONFIG_SUN3
|
|
#define PGDIR_SHIFT 17
|
|
#else
|
|
#define PGDIR_SHIFT 25
|
|
#endif
|
|
#define PGDIR_SIZE (1UL << PGDIR_SHIFT)
|
|
#define PGDIR_MASK (~(PGDIR_SIZE-1))
|
|
|
|
/*
|
|
* entries per page directory level: the m68k is configured as three-level,
|
|
* so we do have PMD level physically.
|
|
*/
|
|
#ifdef CONFIG_SUN3
|
|
#define PTRS_PER_PTE 16
|
|
#define PTRS_PER_PMD 1
|
|
#define PTRS_PER_PGD 2048
|
|
#else
|
|
#define PTRS_PER_PTE 1024
|
|
#define PTRS_PER_PMD 8
|
|
#define PTRS_PER_PGD 128
|
|
#endif
|
|
#define USER_PTRS_PER_PGD (TASK_SIZE/PGDIR_SIZE)
|
|
#define FIRST_USER_ADDRESS 0
|
|
|
|
/* Virtual address region for use by kernel_map() */
|
|
#ifdef CONFIG_SUN3
|
|
#define KMAP_START 0x0DC00000
|
|
#define KMAP_END 0x0E000000
|
|
#else
|
|
#define KMAP_START 0xd0000000
|
|
#define KMAP_END 0xf0000000
|
|
#endif
|
|
|
|
#ifndef CONFIG_SUN3
|
|
/* 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
|
|
* any out-of-bounds memory accesses will hopefully be caught.
|
|
* The vmalloc() routines leaves a hole of 4kB between each vmalloced
|
|
* area for the same reason. ;)
|
|
*/
|
|
#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 vmalloc_end;
|
|
#define VMALLOC_START 0x0f800000
|
|
#define VMALLOC_END vmalloc_end
|
|
#endif /* CONFIG_SUN3 */
|
|
|
|
/* zero page used for uninitialized stuff */
|
|
extern void *empty_zero_page;
|
|
|
|
/*
|
|
* ZERO_PAGE is a global shared page that is always zero: used
|
|
* for zero-mapped memory areas etc..
|
|
*/
|
|
#define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page))
|
|
|
|
/* number of bits that fit into a memory pointer */
|
|
#define BITS_PER_PTR (8*sizeof(unsigned long))
|
|
|
|
/* to align the pointer to a pointer address */
|
|
#define PTR_MASK (~(sizeof(void*)-1))
|
|
|
|
/* sizeof(void*)==1<<SIZEOF_PTR_LOG2 */
|
|
/* 64-bit machines, beware! SRB. */
|
|
#define SIZEOF_PTR_LOG2 2
|
|
|
|
extern void kernel_set_cachemode(void *addr, unsigned long size, int cmode);
|
|
|
|
/*
|
|
* The m68k doesn't have any external MMU info: the kernel page
|
|
* tables contain all the necessary information. The Sun3 does, but
|
|
* they are updated on demand.
|
|
*/
|
|
static inline void update_mmu_cache(struct vm_area_struct *vma,
|
|
unsigned long address, pte_t pte)
|
|
{
|
|
}
|
|
|
|
#endif /* !__ASSEMBLY__ */
|
|
|
|
#define kern_addr_valid(addr) (1)
|
|
|
|
#define io_remap_pfn_range(vma, vaddr, pfn, size, prot) \
|
|
remap_pfn_range(vma, vaddr, pfn, size, prot)
|
|
|
|
/* MMU-specific headers */
|
|
|
|
#ifdef CONFIG_SUN3
|
|
#include <asm/sun3_pgtable.h>
|
|
#else
|
|
#include <asm/motorola_pgtable.h>
|
|
#endif
|
|
|
|
#ifndef __ASSEMBLY__
|
|
#include <asm-generic/pgtable.h>
|
|
|
|
/*
|
|
* Macro to mark a page protection value as "uncacheable".
|
|
*/
|
|
#ifdef SUN3_PAGE_NOCACHE
|
|
# define __SUN3_PAGE_NOCACHE SUN3_PAGE_NOCACHE
|
|
#else
|
|
# define __SUN3_PAGE_NOCACHE 0
|
|
#endif
|
|
#define pgprot_noncached(prot) \
|
|
(MMU_IS_SUN3 \
|
|
? (__pgprot(pgprot_val(prot) | __SUN3_PAGE_NOCACHE)) \
|
|
: ((MMU_IS_851 || MMU_IS_030) \
|
|
? (__pgprot(pgprot_val(prot) | _PAGE_NOCACHE030)) \
|
|
: (MMU_IS_040 || MMU_IS_060) \
|
|
? (__pgprot((pgprot_val(prot) & _CACHEMASK040) | _PAGE_NOCACHE_S)) \
|
|
: (prot)))
|
|
|
|
#endif /* !__ASSEMBLY__ */
|
|
|
|
/*
|
|
* No page table caches to initialise
|
|
*/
|
|
#define pgtable_cache_init() do { } while (0)
|
|
|
|
#define check_pgt_cache() do { } while (0)
|
|
|
|
#endif /* _M68K_PGTABLE_H */
|