187 lines
5.3 KiB
C
187 lines
5.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef __ASM_SH_PAGE_H
|
|
#define __ASM_SH_PAGE_H
|
|
|
|
/*
|
|
* Copyright (C) 1999 Niibe Yutaka
|
|
*/
|
|
|
|
#include <linux/const.h>
|
|
|
|
/* PAGE_SHIFT determines the page size */
|
|
#if defined(CONFIG_PAGE_SIZE_4KB)
|
|
# define PAGE_SHIFT 12
|
|
#elif defined(CONFIG_PAGE_SIZE_8KB)
|
|
# define PAGE_SHIFT 13
|
|
#elif defined(CONFIG_PAGE_SIZE_16KB)
|
|
# define PAGE_SHIFT 14
|
|
#elif defined(CONFIG_PAGE_SIZE_64KB)
|
|
# define PAGE_SHIFT 16
|
|
#else
|
|
# error "Bogus kernel page size?"
|
|
#endif
|
|
|
|
#define PAGE_SIZE (_AC(1, UL) << PAGE_SHIFT)
|
|
#define PAGE_MASK (~(PAGE_SIZE-1))
|
|
#define PTE_MASK PAGE_MASK
|
|
|
|
#if defined(CONFIG_HUGETLB_PAGE_SIZE_64K)
|
|
#define HPAGE_SHIFT 16
|
|
#elif defined(CONFIG_HUGETLB_PAGE_SIZE_256K)
|
|
#define HPAGE_SHIFT 18
|
|
#elif defined(CONFIG_HUGETLB_PAGE_SIZE_1MB)
|
|
#define HPAGE_SHIFT 20
|
|
#elif defined(CONFIG_HUGETLB_PAGE_SIZE_4MB)
|
|
#define HPAGE_SHIFT 22
|
|
#elif defined(CONFIG_HUGETLB_PAGE_SIZE_64MB)
|
|
#define HPAGE_SHIFT 26
|
|
#endif
|
|
|
|
#ifdef CONFIG_HUGETLB_PAGE
|
|
#define HPAGE_SIZE (1UL << HPAGE_SHIFT)
|
|
#define HPAGE_MASK (~(HPAGE_SIZE-1))
|
|
#define HUGETLB_PAGE_ORDER (HPAGE_SHIFT-PAGE_SHIFT)
|
|
#endif
|
|
|
|
#ifndef __ASSEMBLY__
|
|
#include <asm/uncached.h>
|
|
|
|
extern unsigned long shm_align_mask;
|
|
extern unsigned long max_low_pfn, min_low_pfn;
|
|
extern unsigned long memory_start, memory_end, memory_limit;
|
|
|
|
static inline unsigned long
|
|
pages_do_alias(unsigned long addr1, unsigned long addr2)
|
|
{
|
|
return (addr1 ^ addr2) & shm_align_mask;
|
|
}
|
|
|
|
#define clear_page(page) memset((void *)(page), 0, PAGE_SIZE)
|
|
extern void copy_page(void *to, void *from);
|
|
#define copy_user_page(to, from, vaddr, pg) __copy_user(to, from, PAGE_SIZE)
|
|
|
|
struct page;
|
|
struct vm_area_struct;
|
|
|
|
extern void copy_user_highpage(struct page *to, struct page *from,
|
|
unsigned long vaddr, struct vm_area_struct *vma);
|
|
#define __HAVE_ARCH_COPY_USER_HIGHPAGE
|
|
extern void clear_user_highpage(struct page *page, unsigned long vaddr);
|
|
#define clear_user_highpage clear_user_highpage
|
|
|
|
/*
|
|
* These are used to make use of C type-checking..
|
|
*/
|
|
#ifdef CONFIG_X2TLB
|
|
typedef struct { unsigned long pte_low, pte_high; } pte_t;
|
|
typedef struct { unsigned long long pgprot; } pgprot_t;
|
|
typedef struct { unsigned long long pgd; } pgd_t;
|
|
#define pte_val(x) \
|
|
((x).pte_low | ((unsigned long long)(x).pte_high << 32))
|
|
#define __pte(x) \
|
|
({ pte_t __pte = {(x), ((unsigned long long)(x)) >> 32}; __pte; })
|
|
#else
|
|
typedef struct { unsigned long pte_low; } pte_t;
|
|
typedef struct { unsigned long pgprot; } pgprot_t;
|
|
typedef struct { unsigned long pgd; } pgd_t;
|
|
#define pte_val(x) ((x).pte_low)
|
|
#define __pte(x) ((pte_t) { (x) } )
|
|
#endif
|
|
|
|
#define pgd_val(x) ((x).pgd)
|
|
#define pgprot_val(x) ((x).pgprot)
|
|
|
|
#define __pgd(x) ((pgd_t) { (x) } )
|
|
#define __pgprot(x) ((pgprot_t) { (x) } )
|
|
|
|
typedef struct page *pgtable_t;
|
|
|
|
#define pte_pgprot(x) __pgprot(pte_val(x) & PTE_FLAGS_MASK)
|
|
|
|
#endif /* !__ASSEMBLY__ */
|
|
|
|
/*
|
|
* __MEMORY_START and SIZE are the physical addresses and size of RAM.
|
|
*/
|
|
#define __MEMORY_START CONFIG_MEMORY_START
|
|
#define __MEMORY_SIZE CONFIG_MEMORY_SIZE
|
|
|
|
/*
|
|
* PHYSICAL_OFFSET is the offset in physical memory where the base
|
|
* of the kernel is loaded.
|
|
*/
|
|
#ifdef CONFIG_PHYSICAL_START
|
|
#define PHYSICAL_OFFSET (CONFIG_PHYSICAL_START - __MEMORY_START)
|
|
#else
|
|
#define PHYSICAL_OFFSET 0
|
|
#endif
|
|
|
|
/*
|
|
* PAGE_OFFSET is the virtual address of the start of kernel address
|
|
* space.
|
|
*/
|
|
#define PAGE_OFFSET CONFIG_PAGE_OFFSET
|
|
|
|
/*
|
|
* Virtual to physical RAM address translation.
|
|
*
|
|
* In 29 bit mode, the physical offset of RAM from address 0 is visible in
|
|
* the kernel virtual address space, and thus we don't have to take
|
|
* this into account when translating. However in 32 bit mode this offset
|
|
* is not visible (it is part of the PMB mapping) and so needs to be
|
|
* added or subtracted as required.
|
|
*/
|
|
#ifdef CONFIG_PMB
|
|
#define ___pa(x) ((x)-PAGE_OFFSET+__MEMORY_START)
|
|
#define ___va(x) ((x)+PAGE_OFFSET-__MEMORY_START)
|
|
#else
|
|
#define ___pa(x) ((x)-PAGE_OFFSET)
|
|
#define ___va(x) ((x)+PAGE_OFFSET)
|
|
#endif
|
|
|
|
#ifndef __ASSEMBLY__
|
|
#define __pa(x) ___pa((unsigned long)x)
|
|
#define __va(x) (void *)___va((unsigned long)x)
|
|
#endif /* !__ASSEMBLY__ */
|
|
|
|
#ifdef CONFIG_UNCACHED_MAPPING
|
|
#if defined(CONFIG_29BIT)
|
|
#define UNCAC_ADDR(addr) P2SEGADDR(addr)
|
|
#define CAC_ADDR(addr) P1SEGADDR(addr)
|
|
#else
|
|
#define UNCAC_ADDR(addr) ((addr) - PAGE_OFFSET + uncached_start)
|
|
#define CAC_ADDR(addr) ((addr) - uncached_start + PAGE_OFFSET)
|
|
#endif
|
|
#else
|
|
#define UNCAC_ADDR(addr) ((addr))
|
|
#define CAC_ADDR(addr) ((addr))
|
|
#endif
|
|
|
|
#define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT)
|
|
#define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT)
|
|
|
|
/*
|
|
* PFN = physical frame number (ie PFN 0 == physical address 0)
|
|
* PFN_START is the PFN of the first page of RAM. By defining this we
|
|
* don't have struct page entries for the portion of address space
|
|
* between physical address 0 and the start of RAM.
|
|
*/
|
|
#define PFN_START (__MEMORY_START >> PAGE_SHIFT)
|
|
#define ARCH_PFN_OFFSET (PFN_START)
|
|
#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
|
|
#ifdef CONFIG_FLATMEM
|
|
#define pfn_valid(pfn) ((pfn) >= min_low_pfn && (pfn) < max_low_pfn)
|
|
#endif
|
|
#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
|
|
|
|
#include <asm-generic/memory_model.h>
|
|
#include <asm-generic/getorder.h>
|
|
|
|
/*
|
|
* Some drivers need to perform DMA into kmalloc'ed buffers
|
|
* and so we have to increase the kmalloc minalign for this.
|
|
*/
|
|
#define ARCH_DMA_MINALIGN L1_CACHE_BYTES
|
|
|
|
#endif /* __ASM_SH_PAGE_H */
|