1/* SPDX-License-Identifier: GPL-2.0 */ 2/* 3 * Copyright (C) 2020-2022 Loongson Technology Corporation Limited 4 */ 5#ifndef _ASM_PGTABLE_BITS_H 6#define _ASM_PGTABLE_BITS_H 7 8/* Page table bits */ 9#define _PAGE_VALID_SHIFT 0 10#define _PAGE_ACCESSED_SHIFT 0 /* Reuse Valid for Accessed */ 11#define _PAGE_DIRTY_SHIFT 1 12#define _PAGE_PLV_SHIFT 2 /* 2~3, two bits */ 13#define _CACHE_SHIFT 4 /* 4~5, two bits */ 14#define _PAGE_GLOBAL_SHIFT 6 15#define _PAGE_HUGE_SHIFT 6 /* HUGE is a PMD bit */ 16#define _PAGE_PRESENT_SHIFT 7 17#define _PAGE_WRITE_SHIFT 8 18#define _PAGE_MODIFIED_SHIFT 9 19#define _PAGE_PROTNONE_SHIFT 10 20#define _PAGE_SPECIAL_SHIFT 11 21#define _PAGE_HGLOBAL_SHIFT 12 /* HGlobal is a PMD bit */ 22#define _PAGE_PFN_SHIFT 12 23#define _PAGE_PFN_END_SHIFT 48 24#define _PAGE_NO_READ_SHIFT 61 25#define _PAGE_NO_EXEC_SHIFT 62 26#define _PAGE_RPLV_SHIFT 63 27 28/* Used by software */ 29#define _PAGE_PRESENT (_ULCAST_(1) << _PAGE_PRESENT_SHIFT) 30#define _PAGE_WRITE (_ULCAST_(1) << _PAGE_WRITE_SHIFT) 31#define _PAGE_ACCESSED (_ULCAST_(1) << _PAGE_ACCESSED_SHIFT) 32#define _PAGE_MODIFIED (_ULCAST_(1) << _PAGE_MODIFIED_SHIFT) 33#define _PAGE_PROTNONE (_ULCAST_(1) << _PAGE_PROTNONE_SHIFT) 34#define _PAGE_SPECIAL (_ULCAST_(1) << _PAGE_SPECIAL_SHIFT) 35 36/* Used by TLB hardware (placed in EntryLo*) */ 37#define _PAGE_VALID (_ULCAST_(1) << _PAGE_VALID_SHIFT) 38#define _PAGE_DIRTY (_ULCAST_(1) << _PAGE_DIRTY_SHIFT) 39#define _PAGE_PLV (_ULCAST_(3) << _PAGE_PLV_SHIFT) 40#define _PAGE_GLOBAL (_ULCAST_(1) << _PAGE_GLOBAL_SHIFT) 41#define _PAGE_HUGE (_ULCAST_(1) << _PAGE_HUGE_SHIFT) 42#define _PAGE_HGLOBAL (_ULCAST_(1) << _PAGE_HGLOBAL_SHIFT) 43#define _PAGE_NO_READ (_ULCAST_(1) << _PAGE_NO_READ_SHIFT) 44#define _PAGE_NO_EXEC (_ULCAST_(1) << _PAGE_NO_EXEC_SHIFT) 45#define _PAGE_RPLV (_ULCAST_(1) << _PAGE_RPLV_SHIFT) 46#define _CACHE_MASK (_ULCAST_(3) << _CACHE_SHIFT) 47#define _PFN_SHIFT (PAGE_SHIFT - 12 + _PAGE_PFN_SHIFT) 48 49#define _PAGE_USER (PLV_USER << _PAGE_PLV_SHIFT) 50#define _PAGE_KERN (PLV_KERN << _PAGE_PLV_SHIFT) 51 52#define _PFN_MASK (~((_ULCAST_(1) << (_PFN_SHIFT)) - 1) & \ 53 ((_ULCAST_(1) << (_PAGE_PFN_END_SHIFT)) - 1)) 54 55/* 56 * Cache attributes 57 */ 58#ifndef _CACHE_SUC 59#define _CACHE_SUC (0<<_CACHE_SHIFT) /* Strong-ordered UnCached */ 60#endif 61#ifndef _CACHE_CC 62#define _CACHE_CC (1<<_CACHE_SHIFT) /* Coherent Cached */ 63#endif 64#ifndef _CACHE_WUC 65#define _CACHE_WUC (2<<_CACHE_SHIFT) /* Weak-ordered UnCached */ 66#endif 67 68#define __READABLE (_PAGE_VALID) 69#define __WRITEABLE (_PAGE_DIRTY | _PAGE_WRITE) 70 71#define _PAGE_CHG_MASK (_PAGE_MODIFIED | _PAGE_SPECIAL | _PFN_MASK | _CACHE_MASK | _PAGE_PLV) 72#define _HPAGE_CHG_MASK (_PAGE_MODIFIED | _PAGE_SPECIAL | _PFN_MASK | _CACHE_MASK | _PAGE_PLV | _PAGE_HUGE) 73 74#define PAGE_NONE __pgprot(_PAGE_PROTNONE | _PAGE_NO_READ | \ 75 _PAGE_USER | _CACHE_CC) 76#define PAGE_SHARED __pgprot(_PAGE_PRESENT | _PAGE_WRITE | \ 77 _PAGE_USER | _CACHE_CC) 78#define PAGE_READONLY __pgprot(_PAGE_PRESENT | _PAGE_USER | _CACHE_CC) 79 80#define PAGE_KERNEL __pgprot(_PAGE_PRESENT | __READABLE | __WRITEABLE | \ 81 _PAGE_GLOBAL | _PAGE_KERN | _CACHE_CC) 82#define PAGE_KERNEL_SUC __pgprot(_PAGE_PRESENT | __READABLE | __WRITEABLE | \ 83 _PAGE_GLOBAL | _PAGE_KERN | _CACHE_SUC) 84#define PAGE_KERNEL_WUC __pgprot(_PAGE_PRESENT | __READABLE | __WRITEABLE | \ 85 _PAGE_GLOBAL | _PAGE_KERN | _CACHE_WUC) 86 87#define __P000 __pgprot(_CACHE_CC | _PAGE_USER | _PAGE_PROTNONE | _PAGE_NO_EXEC | _PAGE_NO_READ) 88#define __P001 __pgprot(_CACHE_CC | _PAGE_VALID | _PAGE_USER | _PAGE_PRESENT | _PAGE_NO_EXEC) 89#define __P010 __pgprot(_CACHE_CC | _PAGE_VALID | _PAGE_USER | _PAGE_PRESENT | _PAGE_NO_EXEC) 90#define __P011 __pgprot(_CACHE_CC | _PAGE_VALID | _PAGE_USER | _PAGE_PRESENT | _PAGE_NO_EXEC) 91#define __P100 __pgprot(_CACHE_CC | _PAGE_VALID | _PAGE_USER | _PAGE_PRESENT) 92#define __P101 __pgprot(_CACHE_CC | _PAGE_VALID | _PAGE_USER | _PAGE_PRESENT) 93#define __P110 __pgprot(_CACHE_CC | _PAGE_VALID | _PAGE_USER | _PAGE_PRESENT) 94#define __P111 __pgprot(_CACHE_CC | _PAGE_VALID | _PAGE_USER | _PAGE_PRESENT) 95 96#define __S000 __pgprot(_CACHE_CC | _PAGE_USER | _PAGE_PROTNONE | _PAGE_NO_EXEC | _PAGE_NO_READ) 97#define __S001 __pgprot(_CACHE_CC | _PAGE_VALID | _PAGE_USER | _PAGE_PRESENT | _PAGE_NO_EXEC) 98#define __S010 __pgprot(_CACHE_CC | _PAGE_VALID | _PAGE_USER | _PAGE_PRESENT | _PAGE_NO_EXEC | _PAGE_WRITE) 99#define __S011 __pgprot(_CACHE_CC | _PAGE_VALID | _PAGE_USER | _PAGE_PRESENT | _PAGE_NO_EXEC | _PAGE_WRITE) 100#define __S100 __pgprot(_CACHE_CC | _PAGE_VALID | _PAGE_USER | _PAGE_PRESENT) 101#define __S101 __pgprot(_CACHE_CC | _PAGE_VALID | _PAGE_USER | _PAGE_PRESENT) 102#define __S110 __pgprot(_CACHE_CC | _PAGE_VALID | _PAGE_USER | _PAGE_PRESENT | _PAGE_WRITE) 103#define __S111 __pgprot(_CACHE_CC | _PAGE_VALID | _PAGE_USER | _PAGE_PRESENT | _PAGE_WRITE) 104 105#ifndef __ASSEMBLY__ 106 107#define pgprot_noncached pgprot_noncached 108 109static inline pgprot_t pgprot_noncached(pgprot_t _prot) 110{ 111 unsigned long prot = pgprot_val(_prot); 112 113 prot = (prot & ~_CACHE_MASK) | _CACHE_SUC; 114 115 return __pgprot(prot); 116} 117 118#define pgprot_writecombine pgprot_writecombine 119 120static inline pgprot_t pgprot_writecombine(pgprot_t _prot) 121{ 122 unsigned long prot = pgprot_val(_prot); 123 124 prot = (prot & ~_CACHE_MASK) | _CACHE_WUC; 125 126 return __pgprot(prot); 127} 128 129#endif /* !__ASSEMBLY__ */ 130 131#endif /* _ASM_PGTABLE_BITS_H */ 132