195 lines
5.5 KiB
C
195 lines
5.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef _PARISC_PAGE_H
|
|
#define _PARISC_PAGE_H
|
|
|
|
#include <linux/const.h>
|
|
|
|
#if defined(CONFIG_PARISC_PAGE_SIZE_4KB)
|
|
# define PAGE_SHIFT 12
|
|
#elif defined(CONFIG_PARISC_PAGE_SIZE_16KB)
|
|
# define PAGE_SHIFT 14
|
|
#elif defined(CONFIG_PARISC_PAGE_SIZE_64KB)
|
|
# define PAGE_SHIFT 16
|
|
#else
|
|
# error "unknown default kernel page size"
|
|
#endif
|
|
#define PAGE_SIZE (_AC(1,UL) << PAGE_SHIFT)
|
|
#define PAGE_MASK (~(PAGE_SIZE-1))
|
|
|
|
|
|
#ifndef __ASSEMBLY__
|
|
|
|
#include <asm/types.h>
|
|
#include <asm/cache.h>
|
|
|
|
#define clear_page(page) clear_page_asm((void *)(page))
|
|
#define copy_page(to, from) copy_page_asm((void *)(to), (void *)(from))
|
|
|
|
struct page;
|
|
struct vm_area_struct;
|
|
|
|
void clear_page_asm(void *page);
|
|
void copy_page_asm(void *to, void *from);
|
|
#define clear_user_page(vto, vaddr, page) clear_page_asm(vto)
|
|
void copy_user_highpage(struct page *to, struct page *from, unsigned long vaddr,
|
|
struct vm_area_struct *vma);
|
|
#define __HAVE_ARCH_COPY_USER_HIGHPAGE
|
|
|
|
/*
|
|
* These are used to make use of C type-checking..
|
|
*/
|
|
#define STRICT_MM_TYPECHECKS
|
|
#ifdef STRICT_MM_TYPECHECKS
|
|
typedef struct { unsigned long pte; } pte_t; /* either 32 or 64bit */
|
|
|
|
/* NOTE: even on 64 bits, these entries are __u32 because we allocate
|
|
* the pmd and pgd in ZONE_DMA (i.e. under 4GB) */
|
|
typedef struct { __u32 pgd; } pgd_t;
|
|
typedef struct { unsigned long pgprot; } pgprot_t;
|
|
|
|
#if CONFIG_PGTABLE_LEVELS == 3
|
|
typedef struct { __u32 pmd; } pmd_t;
|
|
#define __pmd(x) ((pmd_t) { (x) } )
|
|
/* pXd_val() do not work as lvalues, so make sure we don't use them as such. */
|
|
#define pmd_val(x) ((x).pmd + 0)
|
|
#endif
|
|
|
|
#define pte_val(x) ((x).pte)
|
|
#define pgd_val(x) ((x).pgd + 0)
|
|
#define pgprot_val(x) ((x).pgprot)
|
|
|
|
#define __pte(x) ((pte_t) { (x) } )
|
|
#define __pgd(x) ((pgd_t) { (x) } )
|
|
#define __pgprot(x) ((pgprot_t) { (x) } )
|
|
|
|
#else
|
|
/*
|
|
* .. while these make it easier on the compiler
|
|
*/
|
|
typedef unsigned long pte_t;
|
|
|
|
#if CONFIG_PGTABLE_LEVELS == 3
|
|
typedef __u32 pmd_t;
|
|
#define pmd_val(x) (x)
|
|
#define __pmd(x) (x)
|
|
#endif
|
|
|
|
typedef __u32 pgd_t;
|
|
typedef unsigned long pgprot_t;
|
|
|
|
#define pte_val(x) (x)
|
|
#define pgd_val(x) (x)
|
|
#define pgprot_val(x) (x)
|
|
|
|
#define __pte(x) (x)
|
|
#define __pgd(x) (x)
|
|
#define __pgprot(x) (x)
|
|
|
|
#endif /* STRICT_MM_TYPECHECKS */
|
|
|
|
#define set_pmd(pmdptr, pmdval) (*(pmdptr) = (pmdval))
|
|
#if CONFIG_PGTABLE_LEVELS == 3
|
|
#define set_pud(pudptr, pudval) (*(pudptr) = (pudval))
|
|
#endif
|
|
|
|
typedef struct page *pgtable_t;
|
|
|
|
typedef struct __physmem_range {
|
|
unsigned long start_pfn;
|
|
unsigned long pages; /* PAGE_SIZE pages */
|
|
} physmem_range_t;
|
|
|
|
extern physmem_range_t pmem_ranges[];
|
|
extern int npmem_ranges;
|
|
|
|
#endif /* !__ASSEMBLY__ */
|
|
|
|
/* WARNING: The definitions below must match exactly to sizeof(pte_t)
|
|
* etc
|
|
*/
|
|
#ifdef CONFIG_64BIT
|
|
#define BITS_PER_PTE_ENTRY 3
|
|
#define BITS_PER_PMD_ENTRY 2
|
|
#define BITS_PER_PGD_ENTRY 2
|
|
#else
|
|
#define BITS_PER_PTE_ENTRY 2
|
|
#define BITS_PER_PMD_ENTRY 2
|
|
#define BITS_PER_PGD_ENTRY 2
|
|
#endif
|
|
#define PGD_ENTRY_SIZE (1UL << BITS_PER_PGD_ENTRY)
|
|
#define PMD_ENTRY_SIZE (1UL << BITS_PER_PMD_ENTRY)
|
|
#define PTE_ENTRY_SIZE (1UL << BITS_PER_PTE_ENTRY)
|
|
|
|
#define LINUX_GATEWAY_SPACE 0
|
|
|
|
/* This governs the relationship between virtual and physical addresses.
|
|
* If you alter it, make sure to take care of our various fixed mapping
|
|
* segments in fixmap.h */
|
|
#ifdef CONFIG_64BIT
|
|
#define __PAGE_OFFSET_DEFAULT (0x40000000) /* 1GB */
|
|
#else
|
|
#define __PAGE_OFFSET_DEFAULT (0x10000000) /* 256MB */
|
|
#endif
|
|
|
|
#if defined(BOOTLOADER)
|
|
#define __PAGE_OFFSET (0) /* bootloader uses physical addresses */
|
|
#else
|
|
#define __PAGE_OFFSET __PAGE_OFFSET_DEFAULT
|
|
#endif /* BOOTLOADER */
|
|
|
|
#define PAGE_OFFSET ((unsigned long)__PAGE_OFFSET)
|
|
|
|
/* The size of the gateway page (we leave lots of room for expansion) */
|
|
#define GATEWAY_PAGE_SIZE 0x4000
|
|
|
|
/* The start of the actual kernel binary---used in vmlinux.lds.S
|
|
* Leave some space after __PAGE_OFFSET for detecting kernel null
|
|
* ptr derefs */
|
|
#define KERNEL_BINARY_TEXT_START (__PAGE_OFFSET + 0x100000)
|
|
|
|
/* These macros don't work for 64-bit C code -- don't allow in C at all */
|
|
#ifdef __ASSEMBLY__
|
|
# define PA(x) ((x)-__PAGE_OFFSET)
|
|
# define VA(x) ((x)+__PAGE_OFFSET)
|
|
#endif
|
|
#define __pa(x) ((unsigned long)(x)-PAGE_OFFSET)
|
|
#define __va(x) ((void *)((unsigned long)(x)+PAGE_OFFSET))
|
|
|
|
#ifndef CONFIG_SPARSEMEM
|
|
#define pfn_valid(pfn) ((pfn) < max_mapnr)
|
|
#endif
|
|
|
|
#ifdef CONFIG_HUGETLB_PAGE
|
|
#define HPAGE_SHIFT PMD_SHIFT /* fixed for transparent huge pages */
|
|
#define HPAGE_SIZE ((1UL) << HPAGE_SHIFT)
|
|
#define HPAGE_MASK (~(HPAGE_SIZE - 1))
|
|
#define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT)
|
|
|
|
#if defined(CONFIG_64BIT) && defined(CONFIG_PARISC_PAGE_SIZE_4KB)
|
|
# define REAL_HPAGE_SHIFT 20 /* 20 = 1MB */
|
|
# define _HUGE_PAGE_SIZE_ENCODING_DEFAULT _PAGE_SIZE_ENCODING_1M
|
|
#elif !defined(CONFIG_64BIT) && defined(CONFIG_PARISC_PAGE_SIZE_4KB)
|
|
# define REAL_HPAGE_SHIFT 22 /* 22 = 4MB */
|
|
# define _HUGE_PAGE_SIZE_ENCODING_DEFAULT _PAGE_SIZE_ENCODING_4M
|
|
#else
|
|
# define REAL_HPAGE_SHIFT 24 /* 24 = 16MB */
|
|
# define _HUGE_PAGE_SIZE_ENCODING_DEFAULT _PAGE_SIZE_ENCODING_16M
|
|
#endif
|
|
#endif /* CONFIG_HUGETLB_PAGE */
|
|
|
|
#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
|
|
|
|
#define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT)
|
|
#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
|
|
|
|
#include <asm-generic/memory_model.h>
|
|
#include <asm-generic/getorder.h>
|
|
#include <asm/pdc.h>
|
|
|
|
#define PAGE0 ((struct zeropage *)absolute_pointer(__PAGE_OFFSET))
|
|
|
|
/* DEFINITION OF THE ZERO-PAGE (PAG0) */
|
|
/* based on work by Jason Eckhardt (jason@equator.com) */
|
|
|
|
#endif /* _PARISC_PAGE_H */
|