18c2ecf20Sopenharmony_ci/* 28c2ecf20Sopenharmony_ci * Copyright (C) 2011 Tobias Klauser <tklauser@distanz.ch> 38c2ecf20Sopenharmony_ci * Copyright (C) 2009 Wind River Systems Inc 48c2ecf20Sopenharmony_ci * 58c2ecf20Sopenharmony_ci * This file is subject to the terms and conditions of the GNU General Public 68c2ecf20Sopenharmony_ci * License. See the file "COPYING" in the main directory of this archive 78c2ecf20Sopenharmony_ci * for more details. 88c2ecf20Sopenharmony_ci */ 98c2ecf20Sopenharmony_ci 108c2ecf20Sopenharmony_ci#ifndef _ASM_NIOS2_PGTABLE_BITS_H 118c2ecf20Sopenharmony_ci#define _ASM_NIOS2_PGTABLE_BITS_H 128c2ecf20Sopenharmony_ci 138c2ecf20Sopenharmony_ci/* 148c2ecf20Sopenharmony_ci * These are actual hardware defined protection bits in the tlbacc register 158c2ecf20Sopenharmony_ci * which looks like this: 168c2ecf20Sopenharmony_ci * 178c2ecf20Sopenharmony_ci * 31 30 ... 26 25 24 23 22 21 20 19 18 ... 1 0 188c2ecf20Sopenharmony_ci * ignored........ C R W X G PFN............ 198c2ecf20Sopenharmony_ci */ 208c2ecf20Sopenharmony_ci#define _PAGE_GLOBAL (1<<20) 218c2ecf20Sopenharmony_ci#define _PAGE_EXEC (1<<21) 228c2ecf20Sopenharmony_ci#define _PAGE_WRITE (1<<22) 238c2ecf20Sopenharmony_ci#define _PAGE_READ (1<<23) 248c2ecf20Sopenharmony_ci#define _PAGE_CACHED (1<<24) /* C: data access cacheable */ 258c2ecf20Sopenharmony_ci 268c2ecf20Sopenharmony_ci/* 278c2ecf20Sopenharmony_ci * Software defined bits. They are ignored by the hardware and always read back 288c2ecf20Sopenharmony_ci * as zero, but can be written as non-zero. 298c2ecf20Sopenharmony_ci */ 308c2ecf20Sopenharmony_ci#define _PAGE_PRESENT (1<<25) /* PTE contains a translation */ 318c2ecf20Sopenharmony_ci#define _PAGE_ACCESSED (1<<26) /* page referenced */ 328c2ecf20Sopenharmony_ci#define _PAGE_DIRTY (1<<27) /* dirty page */ 338c2ecf20Sopenharmony_ci 348c2ecf20Sopenharmony_ci#endif /* _ASM_NIOS2_PGTABLE_BITS_H */ 35