b920de1b77
Add architecture support for the MN10300/AM33 CPUs produced by MEI to the kernel. This patch also adds board support for the ASB2303 with the ASB2308 daughter board, and the ASB2305. The only processor supported is the MN103E010, which is an AM33v2 core plus on-chip devices. [akpm@linux-foundation.org: nuke cvs control strings] Signed-off-by: Masakazu Urade <urade.masakazu@jp.panasonic.com> Signed-off-by: Koichi Yasutake <yasutake.koichi@jp.panasonic.com> Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
131 lines
3.7 KiB
C
131 lines
3.7 KiB
C
/* MN10300 Page table definitions
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*
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* Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
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* Written by David Howells (dhowells@redhat.com)
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public Licence
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* as published by the Free Software Foundation; either version
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* 2 of the Licence, or (at your option) any later version.
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*/
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#ifndef _ASM_PAGE_H
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#define _ASM_PAGE_H
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/* PAGE_SHIFT determines the page size */
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#define PAGE_SHIFT 12
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#ifndef __ASSEMBLY__
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#define PAGE_SIZE (1UL << PAGE_SHIFT)
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#define PAGE_MASK (~(PAGE_SIZE - 1))
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#else
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#define PAGE_SIZE +(1 << PAGE_SHIFT) /* unary plus marks an
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* immediate val not an addr */
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#define PAGE_MASK +(~(PAGE_SIZE - 1))
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#endif
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#ifdef __KERNEL__
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#ifndef __ASSEMBLY__
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#define clear_page(page) memset((void *)(page), 0, PAGE_SIZE)
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#define copy_page(to, from) memcpy((void *)(to), (void *)(from), PAGE_SIZE)
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#define clear_user_page(addr, vaddr, page) clear_page(addr)
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#define copy_user_page(vto, vfrom, vaddr, to) copy_page(vto, vfrom)
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/*
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* These are used to make use of C type-checking..
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*/
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typedef struct { unsigned long pte; } pte_t;
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typedef struct { unsigned long pgd; } pgd_t;
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typedef struct { unsigned long pgprot; } pgprot_t;
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typedef struct page *pgtable_t;
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#define PTE_MASK PAGE_MASK
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#define HPAGE_SHIFT 22
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#ifdef CONFIG_HUGETLB_PAGE
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#define HPAGE_SIZE ((1UL) << HPAGE_SHIFT)
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#define HPAGE_MASK (~(HPAGE_SIZE - 1))
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#define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT)
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#endif
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#define pte_val(x) ((x).pte)
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#define pgd_val(x) ((x).pgd)
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#define pgprot_val(x) ((x).pgprot)
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#define __pte(x) ((pte_t) { (x) })
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#define __pgd(x) ((pgd_t) { (x) })
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#define __pgprot(x) ((pgprot_t) { (x) })
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#include <asm-generic/pgtable-nopmd.h>
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#endif /* !__ASSEMBLY__ */
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/* to align the pointer to the (next) page boundary */
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#define PAGE_ALIGN(addr) (((addr) + PAGE_SIZE - 1) & PAGE_MASK)
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/*
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* This handles the memory map.. We could make this a config
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* option, but too many people screw it up, and too few need
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* it.
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*
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* A __PAGE_OFFSET of 0xC0000000 means that the kernel has
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* a virtual address space of one gigabyte, which limits the
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* amount of physical memory you can use to about 950MB.
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*/
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#ifndef __ASSEMBLY__
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/* Pure 2^n version of get_order */
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static inline int get_order(unsigned long size) __attribute__((const));
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static inline int get_order(unsigned long size)
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{
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int order;
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size = (size - 1) >> (PAGE_SHIFT - 1);
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order = -1;
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do {
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size >>= 1;
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order++;
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} while (size);
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return order;
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}
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#endif /* __ASSEMBLY__ */
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#include <asm/page_offset.h>
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#define __PAGE_OFFSET (PAGE_OFFSET_RAW)
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#define PAGE_OFFSET ((unsigned long) __PAGE_OFFSET)
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/*
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* main RAM and kernel working space are coincident at 0x90000000, but to make
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* life more interesting, there's also an uncached virtual shadow at 0xb0000000
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* - these mappings are fixed in the MMU
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*/
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#define __pfn_disp (CONFIG_KERNEL_RAM_BASE_ADDRESS >> PAGE_SHIFT)
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#define __pa(x) ((unsigned long)(x))
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#define __va(x) ((void *)(unsigned long)(x))
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#define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT)
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#define pfn_to_page(pfn) (mem_map + ((pfn) - __pfn_disp))
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#define page_to_pfn(page) ((unsigned long)((page) - mem_map) + __pfn_disp)
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#define pfn_valid(pfn) \
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({ \
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unsigned long __pfn = (pfn) - __pfn_disp; \
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__pfn < max_mapnr; \
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})
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#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
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#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
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#define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT)
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#define VM_DATA_DEFAULT_FLAGS \
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(VM_READ | VM_WRITE | \
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((current->personality & READ_IMPLIES_EXEC) ? VM_EXEC : 0) | \
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VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
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#endif /* __KERNEL__ */
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#endif /* _ASM_PAGE_H */
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