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usr
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linux-headers-6.8.0-83-generic
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arch
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loongarch
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include
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pgtable-bits.h
/* SPDX-License-Identifier: GPL-2.0 */ /* * Copyright (C) 2020-2022 Loongson Technology Corporation Limited */ #ifndef _ASM_PGTABLE_BITS_H #define _ASM_PGTABLE_BITS_H /* Page table bits */ #define _PAGE_VALID_SHIFT 0 #define _PAGE_ACCESSED_SHIFT 0 /* Reuse Valid for Accessed */ #define _PAGE_DIRTY_SHIFT 1 #define _PAGE_PLV_SHIFT 2 /* 2~3, two bits */ #define _CACHE_SHIFT 4 /* 4~5, two bits */ #define _PAGE_GLOBAL_SHIFT 6 #define _PAGE_HUGE_SHIFT 6 /* HUGE is a PMD bit */ #define _PAGE_PRESENT_SHIFT 7 #define _PAGE_WRITE_SHIFT 8 #define _PAGE_MODIFIED_SHIFT 9 #define _PAGE_PROTNONE_SHIFT 10 #define _PAGE_SPECIAL_SHIFT 11 #define _PAGE_HGLOBAL_SHIFT 12 /* HGlobal is a PMD bit */ #define _PAGE_PFN_SHIFT 12 #define _PAGE_SWP_EXCLUSIVE_SHIFT 23 #define _PAGE_PFN_END_SHIFT 48 #define _PAGE_PRESENT_INVALID_SHIFT 60 #define _PAGE_NO_READ_SHIFT 61 #define _PAGE_NO_EXEC_SHIFT 62 #define _PAGE_RPLV_SHIFT 63 /* Used by software */ #define _PAGE_PRESENT (_ULCAST_(1) << _PAGE_PRESENT_SHIFT) #define _PAGE_PRESENT_INVALID (_ULCAST_(1) << _PAGE_PRESENT_INVALID_SHIFT) #define _PAGE_WRITE (_ULCAST_(1) << _PAGE_WRITE_SHIFT) #define _PAGE_ACCESSED (_ULCAST_(1) << _PAGE_ACCESSED_SHIFT) #define _PAGE_MODIFIED (_ULCAST_(1) << _PAGE_MODIFIED_SHIFT) #define _PAGE_PROTNONE (_ULCAST_(1) << _PAGE_PROTNONE_SHIFT) #define _PAGE_SPECIAL (_ULCAST_(1) << _PAGE_SPECIAL_SHIFT) /* We borrow bit 23 to store the exclusive marker in swap PTEs. */ #define _PAGE_SWP_EXCLUSIVE (_ULCAST_(1) << _PAGE_SWP_EXCLUSIVE_SHIFT) /* Used by TLB hardware (placed in EntryLo*) */ #define _PAGE_VALID (_ULCAST_(1) << _PAGE_VALID_SHIFT) #define _PAGE_DIRTY (_ULCAST_(1) << _PAGE_DIRTY_SHIFT) #define _PAGE_PLV (_ULCAST_(3) << _PAGE_PLV_SHIFT) #define _PAGE_GLOBAL (_ULCAST_(1) << _PAGE_GLOBAL_SHIFT) #define _PAGE_HUGE (_ULCAST_(1) << _PAGE_HUGE_SHIFT) #define _PAGE_HGLOBAL (_ULCAST_(1) << _PAGE_HGLOBAL_SHIFT) #define _PAGE_NO_READ (_ULCAST_(1) << _PAGE_NO_READ_SHIFT) #define _PAGE_NO_EXEC (_ULCAST_(1) << _PAGE_NO_EXEC_SHIFT) #define _PAGE_RPLV (_ULCAST_(1) << _PAGE_RPLV_SHIFT) #define _CACHE_MASK (_ULCAST_(3) << _CACHE_SHIFT) #define PFN_PTE_SHIFT (PAGE_SHIFT - 12 + _PAGE_PFN_SHIFT) #define _PAGE_USER (PLV_USER << _PAGE_PLV_SHIFT) #define _PAGE_KERN (PLV_KERN << _PAGE_PLV_SHIFT) #define _PFN_MASK (~((_ULCAST_(1) << (PFN_PTE_SHIFT)) - 1) & \ ((_ULCAST_(1) << (_PAGE_PFN_END_SHIFT)) - 1)) /* * Cache attributes */ #ifndef _CACHE_SUC #define _CACHE_SUC (0<<_CACHE_SHIFT) /* Strong-ordered UnCached */ #endif #ifndef _CACHE_CC #define _CACHE_CC (1<<_CACHE_SHIFT) /* Coherent Cached */ #endif #ifndef _CACHE_WUC #define _CACHE_WUC (2<<_CACHE_SHIFT) /* Weak-ordered UnCached */ #endif #define __READABLE (_PAGE_VALID) #define __WRITEABLE (_PAGE_DIRTY | _PAGE_WRITE) #define _PAGE_CHG_MASK (_PAGE_MODIFIED | _PAGE_SPECIAL | _PFN_MASK | _CACHE_MASK | _PAGE_PLV) #define _HPAGE_CHG_MASK (_PAGE_MODIFIED | _PAGE_SPECIAL | _PFN_MASK | _CACHE_MASK | _PAGE_PLV | _PAGE_HUGE) #define PAGE_NONE __pgprot(_PAGE_PROTNONE | _PAGE_NO_READ | \ _PAGE_USER | _CACHE_CC) #define PAGE_SHARED __pgprot(_PAGE_PRESENT | _PAGE_WRITE | \ _PAGE_USER | _CACHE_CC) #define PAGE_READONLY __pgprot(_PAGE_PRESENT | _PAGE_USER | _CACHE_CC) #define PAGE_KERNEL __pgprot(_PAGE_PRESENT | __READABLE | __WRITEABLE | \ _PAGE_GLOBAL | _PAGE_KERN | _CACHE_CC) #define PAGE_KERNEL_SUC __pgprot(_PAGE_PRESENT | __READABLE | __WRITEABLE | \ _PAGE_GLOBAL | _PAGE_KERN | _CACHE_SUC) #define PAGE_KERNEL_WUC __pgprot(_PAGE_PRESENT | __READABLE | __WRITEABLE | \ _PAGE_GLOBAL | _PAGE_KERN | _CACHE_WUC) #ifndef __ASSEMBLY__ #define _PAGE_IOREMAP pgprot_val(PAGE_KERNEL_SUC) #define pgprot_noncached pgprot_noncached static inline pgprot_t pgprot_noncached(pgprot_t _prot) { unsigned long prot = pgprot_val(_prot); prot = (prot & ~_CACHE_MASK) | _CACHE_SUC; return __pgprot(prot); } extern bool wc_enabled; #define pgprot_writecombine pgprot_writecombine static inline pgprot_t pgprot_writecombine(pgprot_t _prot) { unsigned long prot = pgprot_val(_prot); prot = (prot & ~_CACHE_MASK) | (wc_enabled ? _CACHE_WUC : _CACHE_SUC); return __pgprot(prot); } #endif /* !__ASSEMBLY__ */ #endif /* _ASM_PGTABLE_BITS_H */
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