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/* 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;
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_page(void *vto, void *vfrom, unsigned long vaddr,
struct page *pg);
/*
* 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 pmd; } pmd_t;
typedef struct { __u32 pgd; } pgd_t;
typedef struct { unsigned long pgprot; } pgprot_t;
#define pte_val(x) ((x).pte)
/* These do not work lvalues, so make sure we don't use them as such. */
#define pmd_val(x) ((x).pmd + 0)
#define pgd_val(x) ((x).pgd + 0)
#define pgprot_val(x) ((x).pgprot)
#define __pte(x) ((pte_t) { (x) } )
#define __pmd(x) ((pmd_t) { (x) } )
#define __pgd(x) ((pgd_t) { (x) } )
#define __pgprot(x) ((pgprot_t) { (x) } )
#define __pmd_val_set(x,n) (x).pmd = (n)
#define __pgd_val_set(x,n) (x).pgd = (n)
#else
/*
* .. while these make it easier on the compiler
*/
typedef unsigned long pte_t;
typedef __u32 pmd_t;
typedef __u32 pgd_t;
typedef unsigned long pgprot_t;
#define pte_val(x) (x)
#define pmd_val(x) (x)
#define pgd_val(x) (x)
#define pgprot_val(x) (x)
#define __pte(x) (x)
#define __pmd(x) (x)
#define __pgd(x) (x)
#define __pgprot(x) (x)
#define __pmd_val_set(x,n) (x) = (n)
#define __pgd_val_set(x,n) (x) = (n)
#endif /* STRICT_MM_TYPECHECKS */
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 BITS_PER_PMD_ENTRY
#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_DISCONTIGMEM
#define pfn_valid(pfn) ((pfn) < max_mapnr)
#endif /* CONFIG_DISCONTIGMEM */
#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)
#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
#include <asm-generic/memory_model.h>
#include <asm-generic/getorder.h>
#include <asm/pdc.h>
#define PAGE0 ((struct zeropage *)__PAGE_OFFSET)
/* DEFINITION OF THE ZERO-PAGE (PAG0) */
/* based on work by Jason Eckhardt (jason@equator.com) */
#endif /* _PARISC_PAGE_H */
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