^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) /* SPDX-License-Identifier: GPL-2.0-or-later */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * OpenRISC Linux
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Linux architectural port borrowing liberally from similar works of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * others. All original copyrights apply as per the original source
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * declaration.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) * OpenRISC implementation:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) * Copyright (C) 2003 Matjaz Breskvar <phoenix@bsemi.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) * Copyright (C) 2010-2011 Jonas Bonn <jonas@southpole.se>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) * et al.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) /* or32 pgtable.h - macros and functions to manipulate page tables
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) * Based on:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) * include/asm-cris/pgtable.h
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #ifndef __ASM_OPENRISC_PGTABLE_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #define __ASM_OPENRISC_PGTABLE_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #include <asm-generic/pgtable-nopmd.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #ifndef __ASSEMBLY__
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #include <asm/mmu.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #include <asm/fixmap.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) * The Linux memory management assumes a three-level page table setup. On
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) * or32, we use that, but "fold" the mid level into the top-level page
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) * table. Since the MMU TLB is software loaded through an interrupt, it
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) * supports any page table structure, so we could have used a three-level
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) * setup, but for the amounts of memory we normally use, a two-level is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) * probably more efficient.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) * This file contains the functions and defines necessary to modify and use
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) * the or32 page table tree.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) extern void paging_init(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) /* Certain architectures need to do special things when pte's
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) * within a page table are directly modified. Thus, the following
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) * hook is made available.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) #define set_pte(pteptr, pteval) ((*(pteptr)) = (pteval))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) #define set_pte_at(mm, addr, ptep, pteval) set_pte(ptep, pteval)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) * (pmds are folded into pgds so this doesn't get actually called,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) * but the define is needed for a generic inline function.)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) #define set_pmd(pmdptr, pmdval) (*(pmdptr) = pmdval)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) #define PGDIR_SHIFT (PAGE_SHIFT + (PAGE_SHIFT-2))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) #define PGDIR_SIZE (1UL << PGDIR_SHIFT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) #define PGDIR_MASK (~(PGDIR_SIZE-1))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) * entries per page directory level: we use a two-level, so
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) * we don't really have any PMD directory physically.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) * pointers are 4 bytes so we can use the page size and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) * divide it by 4 (shift by 2).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) #define PTRS_PER_PTE (1UL << (PAGE_SHIFT-2))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) #define PTRS_PER_PGD (1UL << (32-PGDIR_SHIFT))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) /* calculate how many PGD entries a user-level program can use
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) * the first mappable virtual address is 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) * (TASK_SIZE is the maximum virtual address space)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) #define USER_PTRS_PER_PGD (TASK_SIZE/PGDIR_SIZE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) #define FIRST_USER_ADDRESS 0UL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) * Kernels own virtual memory area.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) * The size and location of the vmalloc area are chosen so that modules
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) * placed in this area aren't more than a 28-bit signed offset from any
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) * kernel functions that they may need. This greatly simplifies handling
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) * of the relocations for l.j and l.jal instructions as we don't need to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) * introduce any trampolines for reaching "distant" code.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) * 64 MB of vmalloc area is comparable to what's available on other arches.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) #define VMALLOC_START (PAGE_OFFSET-0x04000000UL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) #define VMALLOC_END (PAGE_OFFSET)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) #define VMALLOC_VMADDR(x) ((unsigned long)(x))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) /* Define some higher level generic page attributes.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) * If you change _PAGE_CI definition be sure to change it in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) * io.h for ioremap() too.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) * An OR32 PTE looks like this:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) * | 31 ... 10 | 9 | 8 ... 6 | 5 | 4 | 3 | 2 | 1 | 0 |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) * Phys pg.num L PP Index D A WOM WBC CI CC
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) * L : link
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) * PPI: Page protection index
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) * D : Dirty
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) * A : Accessed
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) * WOM: Weakly ordered memory
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) * WBC: Write-back cache
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) * CI : Cache inhibit
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) * CC : Cache coherent
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) * The protection bits below should correspond to the layout of the actual
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) * PTE as per above
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) #define _PAGE_CC 0x001 /* software: pte contains a translation */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) #define _PAGE_CI 0x002 /* cache inhibit */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) #define _PAGE_WBC 0x004 /* write back cache */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) #define _PAGE_WOM 0x008 /* weakly ordered memory */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) #define _PAGE_A 0x010 /* accessed */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) #define _PAGE_D 0x020 /* dirty */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) #define _PAGE_URE 0x040 /* user read enable */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) #define _PAGE_UWE 0x080 /* user write enable */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) #define _PAGE_SRE 0x100 /* superuser read enable */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) #define _PAGE_SWE 0x200 /* superuser write enable */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) #define _PAGE_EXEC 0x400 /* software: page is executable */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) #define _PAGE_U_SHARED 0x800 /* software: page is shared in user space */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) /* 0x001 is cache coherency bit, which should always be set to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) * 1 - for SMP (when we support it)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) * 0 - otherwise
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) * we just reuse this bit in software for _PAGE_PRESENT and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) * force it to 0 when loading it into TLB.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) #define _PAGE_PRESENT _PAGE_CC
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) #define _PAGE_USER _PAGE_URE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) #define _PAGE_WRITE (_PAGE_UWE | _PAGE_SWE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) #define _PAGE_DIRTY _PAGE_D
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) #define _PAGE_ACCESSED _PAGE_A
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) #define _PAGE_NO_CACHE _PAGE_CI
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) #define _PAGE_SHARED _PAGE_U_SHARED
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) #define _PAGE_READ (_PAGE_URE | _PAGE_SRE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) #define _PAGE_CHG_MASK (PAGE_MASK | _PAGE_ACCESSED | _PAGE_DIRTY)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) #define _PAGE_BASE (_PAGE_PRESENT | _PAGE_ACCESSED)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) #define _PAGE_ALL (_PAGE_PRESENT | _PAGE_ACCESSED)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) #define _KERNPG_TABLE \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) (_PAGE_BASE | _PAGE_SRE | _PAGE_SWE | _PAGE_ACCESSED | _PAGE_DIRTY)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) #define PAGE_NONE __pgprot(_PAGE_ALL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) #define PAGE_READONLY __pgprot(_PAGE_ALL | _PAGE_URE | _PAGE_SRE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) #define PAGE_READONLY_X __pgprot(_PAGE_ALL | _PAGE_URE | _PAGE_SRE | _PAGE_EXEC)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) #define PAGE_SHARED \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) __pgprot(_PAGE_ALL | _PAGE_URE | _PAGE_SRE | _PAGE_UWE | _PAGE_SWE \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) | _PAGE_SHARED)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) #define PAGE_SHARED_X \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) __pgprot(_PAGE_ALL | _PAGE_URE | _PAGE_SRE | _PAGE_UWE | _PAGE_SWE \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) | _PAGE_SHARED | _PAGE_EXEC)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) #define PAGE_COPY __pgprot(_PAGE_ALL | _PAGE_URE | _PAGE_SRE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) #define PAGE_COPY_X __pgprot(_PAGE_ALL | _PAGE_URE | _PAGE_SRE | _PAGE_EXEC)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) #define PAGE_KERNEL \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) __pgprot(_PAGE_ALL | _PAGE_SRE | _PAGE_SWE \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) | _PAGE_SHARED | _PAGE_DIRTY | _PAGE_EXEC)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) #define PAGE_KERNEL_RO \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) __pgprot(_PAGE_ALL | _PAGE_SRE \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) | _PAGE_SHARED | _PAGE_DIRTY | _PAGE_EXEC)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) #define PAGE_KERNEL_NOCACHE \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) __pgprot(_PAGE_ALL | _PAGE_SRE | _PAGE_SWE \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) | _PAGE_SHARED | _PAGE_DIRTY | _PAGE_EXEC | _PAGE_CI)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) #define __P000 PAGE_NONE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) #define __P001 PAGE_READONLY_X
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) #define __P010 PAGE_COPY
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) #define __P011 PAGE_COPY_X
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) #define __P100 PAGE_READONLY
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) #define __P101 PAGE_READONLY_X
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) #define __P110 PAGE_COPY
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) #define __P111 PAGE_COPY_X
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) #define __S000 PAGE_NONE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) #define __S001 PAGE_READONLY_X
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) #define __S010 PAGE_SHARED
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) #define __S011 PAGE_SHARED_X
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) #define __S100 PAGE_READONLY
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) #define __S101 PAGE_READONLY_X
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) #define __S110 PAGE_SHARED
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) #define __S111 PAGE_SHARED_X
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) /* zero page used for uninitialized stuff */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) extern unsigned long empty_zero_page[2048];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) #define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) /* number of bits that fit into a memory pointer */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) #define BITS_PER_PTR (8*sizeof(unsigned long))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) /* to align the pointer to a pointer address */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) #define PTR_MASK (~(sizeof(void *)-1))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) /* sizeof(void*)==1<<SIZEOF_PTR_LOG2 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) /* 64-bit machines, beware! SRB. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) #define SIZEOF_PTR_LOG2 2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) /* to find an entry in a page-table */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) #define PAGE_PTR(address) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) ((unsigned long)(address)>>(PAGE_SHIFT-SIZEOF_PTR_LOG2)&PTR_MASK&~PAGE_MASK)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) /* to set the page-dir */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) #define SET_PAGE_DIR(tsk, pgdir)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) #define pte_none(x) (!pte_val(x))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) #define pte_present(x) (pte_val(x) & _PAGE_PRESENT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) #define pte_clear(mm, addr, xp) do { pte_val(*(xp)) = 0; } while (0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) #define pmd_none(x) (!pmd_val(x))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) #define pmd_bad(x) ((pmd_val(x) & (~PAGE_MASK)) != _KERNPG_TABLE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) #define pmd_present(x) (pmd_val(x) & _PAGE_PRESENT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) #define pmd_clear(xp) do { pmd_val(*(xp)) = 0; } while (0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) * The following only work if pte_present() is true.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) * Undefined behaviour if not..
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) static inline int pte_read(pte_t pte) { return pte_val(pte) & _PAGE_READ; }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) static inline int pte_write(pte_t pte) { return pte_val(pte) & _PAGE_WRITE; }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) static inline int pte_exec(pte_t pte) { return pte_val(pte) & _PAGE_EXEC; }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) static inline int pte_dirty(pte_t pte) { return pte_val(pte) & _PAGE_DIRTY; }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) static inline int pte_young(pte_t pte) { return pte_val(pte) & _PAGE_ACCESSED; }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) static inline pte_t pte_wrprotect(pte_t pte)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) pte_val(pte) &= ~(_PAGE_WRITE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) return pte;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) static inline pte_t pte_rdprotect(pte_t pte)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) pte_val(pte) &= ~(_PAGE_READ);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) return pte;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) static inline pte_t pte_exprotect(pte_t pte)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) pte_val(pte) &= ~(_PAGE_EXEC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) return pte;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) static inline pte_t pte_mkclean(pte_t pte)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) pte_val(pte) &= ~(_PAGE_DIRTY);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) return pte;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) static inline pte_t pte_mkold(pte_t pte)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) pte_val(pte) &= ~(_PAGE_ACCESSED);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) return pte;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) static inline pte_t pte_mkwrite(pte_t pte)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) pte_val(pte) |= _PAGE_WRITE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) return pte;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) static inline pte_t pte_mkread(pte_t pte)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) pte_val(pte) |= _PAGE_READ;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) return pte;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) static inline pte_t pte_mkexec(pte_t pte)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) pte_val(pte) |= _PAGE_EXEC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) return pte;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) static inline pte_t pte_mkdirty(pte_t pte)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) pte_val(pte) |= _PAGE_DIRTY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) return pte;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) static inline pte_t pte_mkyoung(pte_t pte)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) pte_val(pte) |= _PAGE_ACCESSED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) return pte;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) * Conversion functions: convert a page and protection to a page entry,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) * and a page entry and page directory to the page they refer to.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) /* What actually goes as arguments to the various functions is less than
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) * obvious, but a rule of thumb is that struct page's goes as struct page *,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) * really physical DRAM addresses are unsigned long's, and DRAM "virtual"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) * addresses (the 0xc0xxxxxx's) goes as void *'s.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) static inline pte_t __mk_pte(void *page, pgprot_t pgprot)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) pte_t pte;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) /* the PTE needs a physical address */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) pte_val(pte) = __pa(page) | pgprot_val(pgprot);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) return pte;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) #define mk_pte(page, pgprot) __mk_pte(page_address(page), (pgprot))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) #define mk_pte_phys(physpage, pgprot) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) ({ \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) pte_t __pte; \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) pte_val(__pte) = (physpage) + pgprot_val(pgprot); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) __pte; \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) })
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) pte_val(pte) = (pte_val(pte) & _PAGE_CHG_MASK) | pgprot_val(newprot);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) return pte;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) * pte_val refers to a page in the 0x0xxxxxxx physical DRAM interval
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) * __pte_page(pte_val) refers to the "virtual" DRAM interval
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) * pte_pagenr refers to the page-number counted starting from the virtual
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) * DRAM start
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) static inline unsigned long __pte_page(pte_t pte)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) /* the PTE contains a physical address */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) return (unsigned long)__va(pte_val(pte) & PAGE_MASK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) #define pte_pagenr(pte) ((__pte_page(pte) - PAGE_OFFSET) >> PAGE_SHIFT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) /* permanent address of a page */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) #define __page_address(page) (PAGE_OFFSET + (((page) - mem_map) << PAGE_SHIFT))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) #define pte_page(pte) (mem_map+pte_pagenr(pte))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) * only the pte's themselves need to point to physical DRAM (see above)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) * the pagetable links are purely handled within the kernel SW and thus
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) * don't need the __pa and __va transformations.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) static inline void pmd_set(pmd_t *pmdp, pte_t *ptep)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) pmd_val(*pmdp) = _KERNPG_TABLE | (unsigned long) ptep;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) #define pmd_page(pmd) (pfn_to_page(pmd_val(pmd) >> PAGE_SHIFT))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) static inline unsigned long pmd_page_vaddr(pmd_t pmd)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) return ((unsigned long) __va(pmd_val(pmd) & PAGE_MASK));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) #define __pmd_offset(address) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) (((address) >> PMD_SHIFT) & (PTRS_PER_PMD-1))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) #define pte_pfn(x) ((unsigned long)(((x).pte)) >> PAGE_SHIFT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) #define pfn_pte(pfn, prot) __pte((((pfn) << PAGE_SHIFT)) | pgprot_val(prot))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) #define pte_ERROR(e) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) printk(KERN_ERR "%s:%d: bad pte %p(%08lx).\n", \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) __FILE__, __LINE__, &(e), pte_val(e))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) #define pgd_ERROR(e) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) printk(KERN_ERR "%s:%d: bad pgd %p(%08lx).\n", \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) __FILE__, __LINE__, &(e), pgd_val(e))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) extern pgd_t swapper_pg_dir[PTRS_PER_PGD]; /* defined in head.S */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) struct vm_area_struct;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) static inline void update_tlb(struct vm_area_struct *vma,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) unsigned long address, pte_t *pte)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) extern void update_cache(struct vm_area_struct *vma,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) unsigned long address, pte_t *pte);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) static inline void update_mmu_cache(struct vm_area_struct *vma,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) unsigned long address, pte_t *pte)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) update_tlb(vma, address, pte);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) update_cache(vma, address, pte);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) /* __PHX__ FIXME, SWAP, this probably doesn't work */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) /* Encode and de-code a swap entry (must be !pte_none(e) && !pte_present(e)) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) /* Since the PAGE_PRESENT bit is bit 4, we can use the bits above */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) #define __swp_type(x) (((x).val >> 5) & 0x7f)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) #define __swp_offset(x) ((x).val >> 12)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) #define __swp_entry(type, offset) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) ((swp_entry_t) { ((type) << 5) | ((offset) << 12) })
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) #define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) })
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) #define __swp_entry_to_pte(x) ((pte_t) { (x).val })
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) #define kern_addr_valid(addr) (1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) typedef pte_t *pte_addr_t;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) #endif /* __ASSEMBLY__ */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) #endif /* __ASM_OPENRISC_PGTABLE_H */
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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