1 /* SPDX-License-Identifier: GPL-2.0 */
5 #include <linux/const.h>
7 #if defined(CONFIG_PARISC_PAGE_SIZE_4KB)
9 #elif defined(CONFIG_PARISC_PAGE_SIZE_16KB)
10 # define PAGE_SHIFT 14
11 #elif defined(CONFIG_PARISC_PAGE_SIZE_64KB)
12 # define PAGE_SHIFT 16
14 # error "unknown default kernel page size"
16 #define PAGE_SIZE (_AC(1,UL) << PAGE_SHIFT)
17 #define PAGE_MASK (~(PAGE_SIZE-1))
22 #include <asm/types.h>
23 #include <asm/cache.h>
25 #define clear_page(page) clear_page_asm((void *)(page))
26 #define copy_page(to, from) copy_page_asm((void *)(to), (void *)(from))
29 struct vm_area_struct;
31 void clear_page_asm(void *page);
32 void copy_page_asm(void *to, void *from);
33 #define clear_user_page(vto, vaddr, page) clear_page_asm(vto)
34 void copy_user_highpage(struct page *to, struct page *from, unsigned long vaddr,
35 struct vm_area_struct *vma);
36 #define __HAVE_ARCH_COPY_USER_HIGHPAGE
39 * These are used to make use of C type-checking..
41 #define STRICT_MM_TYPECHECKS
42 #ifdef STRICT_MM_TYPECHECKS
43 typedef struct { unsigned long pte; } pte_t; /* either 32 or 64bit */
45 /* NOTE: even on 64 bits, these entries are __u32 because we allocate
46 * the pmd and pgd in ZONE_DMA (i.e. under 4GB) */
47 typedef struct { __u32 pgd; } pgd_t;
48 typedef struct { unsigned long pgprot; } pgprot_t;
50 #if CONFIG_PGTABLE_LEVELS == 3
51 typedef struct { __u32 pmd; } pmd_t;
52 #define __pmd(x) ((pmd_t) { (x) } )
53 /* pXd_val() do not work as lvalues, so make sure we don't use them as such. */
54 #define pmd_val(x) ((x).pmd + 0)
57 #define pte_val(x) ((x).pte)
58 #define pgd_val(x) ((x).pgd + 0)
59 #define pgprot_val(x) ((x).pgprot)
61 #define __pte(x) ((pte_t) { (x) } )
62 #define __pgd(x) ((pgd_t) { (x) } )
63 #define __pgprot(x) ((pgprot_t) { (x) } )
67 * .. while these make it easier on the compiler
69 typedef unsigned long pte_t;
71 #if CONFIG_PGTABLE_LEVELS == 3
73 #define pmd_val(x) (x)
78 typedef unsigned long pgprot_t;
80 #define pte_val(x) (x)
81 #define pgd_val(x) (x)
82 #define pgprot_val(x) (x)
86 #define __pgprot(x) (x)
88 #endif /* STRICT_MM_TYPECHECKS */
90 #define set_pmd(pmdptr, pmdval) (*(pmdptr) = (pmdval))
91 #if CONFIG_PGTABLE_LEVELS == 3
92 #define set_pud(pudptr, pudval) (*(pudptr) = (pudval))
95 typedef struct page *pgtable_t;
97 typedef struct __physmem_range {
98 unsigned long start_pfn;
99 unsigned long pages; /* PAGE_SIZE pages */
102 extern physmem_range_t pmem_ranges[];
103 extern int npmem_ranges;
105 #endif /* !__ASSEMBLY__ */
107 /* WARNING: The definitions below must match exactly to sizeof(pte_t)
111 #define BITS_PER_PTE_ENTRY 3
112 #define BITS_PER_PMD_ENTRY 2
113 #define BITS_PER_PGD_ENTRY 2
115 #define BITS_PER_PTE_ENTRY 2
116 #define BITS_PER_PMD_ENTRY 2
117 #define BITS_PER_PGD_ENTRY 2
119 #define PGD_ENTRY_SIZE (1UL << BITS_PER_PGD_ENTRY)
120 #define PMD_ENTRY_SIZE (1UL << BITS_PER_PMD_ENTRY)
121 #define PTE_ENTRY_SIZE (1UL << BITS_PER_PTE_ENTRY)
123 #define LINUX_GATEWAY_SPACE 0
125 /* This governs the relationship between virtual and physical addresses.
126 * If you alter it, make sure to take care of our various fixed mapping
127 * segments in fixmap.h */
129 #define __PAGE_OFFSET_DEFAULT (0x40000000) /* 1GB */
131 #define __PAGE_OFFSET_DEFAULT (0x10000000) /* 256MB */
134 #if defined(BOOTLOADER)
135 #define __PAGE_OFFSET (0) /* bootloader uses physical addresses */
137 #define __PAGE_OFFSET __PAGE_OFFSET_DEFAULT
138 #endif /* BOOTLOADER */
140 #define PAGE_OFFSET ((unsigned long)__PAGE_OFFSET)
142 /* The size of the gateway page (we leave lots of room for expansion) */
143 #define GATEWAY_PAGE_SIZE 0x4000
145 /* The start of the actual kernel binary---used in vmlinux.lds.S
146 * Leave some space after __PAGE_OFFSET for detecting kernel null
148 #define KERNEL_BINARY_TEXT_START (__PAGE_OFFSET + 0x100000)
150 /* These macros don't work for 64-bit C code -- don't allow in C at all */
152 # define PA(x) ((x)-__PAGE_OFFSET)
153 # define VA(x) ((x)+__PAGE_OFFSET)
155 #define __pa(x) ((unsigned long)(x)-PAGE_OFFSET)
156 #define __va(x) ((void *)((unsigned long)(x)+PAGE_OFFSET))
158 #ifdef CONFIG_HUGETLB_PAGE
159 #define HPAGE_SHIFT PMD_SHIFT /* fixed for transparent huge pages */
160 #define HPAGE_SIZE ((1UL) << HPAGE_SHIFT)
161 #define HPAGE_MASK (~(HPAGE_SIZE - 1))
162 #define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT)
164 #if defined(CONFIG_64BIT) && defined(CONFIG_PARISC_PAGE_SIZE_4KB)
165 # define REAL_HPAGE_SHIFT 20 /* 20 = 1MB */
166 # define _HUGE_PAGE_SIZE_ENCODING_DEFAULT _PAGE_SIZE_ENCODING_1M
167 #elif !defined(CONFIG_64BIT) && defined(CONFIG_PARISC_PAGE_SIZE_4KB)
168 # define REAL_HPAGE_SHIFT 22 /* 22 = 4MB */
169 # define _HUGE_PAGE_SIZE_ENCODING_DEFAULT _PAGE_SIZE_ENCODING_4M
171 # define REAL_HPAGE_SHIFT 24 /* 24 = 16MB */
172 # define _HUGE_PAGE_SIZE_ENCODING_DEFAULT _PAGE_SIZE_ENCODING_16M
174 #endif /* CONFIG_HUGETLB_PAGE */
176 #define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
178 #define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT)
179 #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
181 #include <asm-generic/memory_model.h>
182 #include <asm-generic/getorder.h>
185 #define PAGE0 ((struct zeropage *)absolute_pointer(__PAGE_OFFSET))
187 /* DEFINITION OF THE ZERO-PAGE (PAG0) */
188 /* based on work by Jason Eckhardt (jason@equator.com) */
190 #endif /* _PARISC_PAGE_H */