1 /*- 2 * Copyright (c) 2010 Isilon Systems, Inc. 3 * Copyright (c) 2010 iX Systems, Inc. 4 * Copyright (c) 2010 Panasas, Inc. 5 * Copyright (c) 2013, 2014 Mellanox Technologies, Ltd. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice unmodified, this list of conditions, and the following 13 * disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 */ 29 #ifndef _LINUXKPI_ASM_PGTABLE_H_ 30 #define _LINUXKPI_ASM_PGTABLE_H_ 31 32 #include <linux/page.h> 33 34 typedef unsigned long pteval_t; 35 typedef unsigned long pmdval_t; 36 typedef unsigned long pudval_t; 37 typedef unsigned long pgdval_t; 38 typedef unsigned long pgprotval_t; 39 typedef struct page *pgtable_t; 40 41 #define pgprot_decrypted(prot) (prot) 42 43 #if defined(__i386__) || defined(__amd64__) 44 #define _PAGE_BIT_PRESENT 0 45 #define _PAGE_BIT_RW 1 46 #define _PAGE_BIT_USER 2 47 #define _PAGE_BIT_PWT 3 48 #define _PAGE_BIT_PCD 4 49 #define _PAGE_BIT_PAT 7 50 51 #define _PAGE_PRESENT (((pteval_t) 1) << _PAGE_BIT_PRESENT) 52 #define _PAGE_RW (((pteval_t) 1) << _PAGE_BIT_RW) 53 #define _PAGE_PWT (((pteval_t) 1) << _PAGE_BIT_PWT) 54 #define _PAGE_PCD (((pteval_t) 1) << _PAGE_BIT_PCD) 55 #define _PAGE_PAT (((pteval_t) 1) << _PAGE_BIT_PAT) 56 57 /* 58 * On Linux, the value of `PMD_SHIFT` is hard-coded to 21. This corresponds to 59 * the FreeBSD `PDRSHIFT` constant. 60 */ 61 #define PMD_SHIFT PDRSHIFT 62 63 #elif defined(__aarch64__) 64 65 /* 66 * On Linux, the value of `PMD_SHIFT` is computed from `CONFIG_PGTABLE_LEVELS`. 67 * The result corresponds to one of the FreeBSD `L*_SHIFT` constants. Here, we 68 * take the value 21 computed from `CONFIG_PGTABLE_LEVELS = 4`, the default on 69 * aarch64, which equals to `L2_SHIFT`. 70 */ 71 #define PMD_SHIFT L2_SHIFT 72 73 #elif defined(__powerpc__) 74 75 /* 76 * On Linux, the value of `PMD_SHIFT` is the addition of `PAGE_SHIFT` and 77 * `PTE_INDEX_SIZE` (hard-coded to 9). The result corresponds to the FreeBSD 78 * `L3_PAGE_SIZE_SHIFT` constant. 79 */ 80 #define PMD_SHIFT L3_PAGE_SIZE_SHIFT 81 82 #elif defined(__riscv) 83 84 /* 85 * On Linux, the value of `PMD_SHIFT` is hard-coded to 21. This corresponds to 86 * the FreeBSD `L2_SHIFT` constant. 87 */ 88 #define PMD_SHIFT L2_SHIFT 89 90 #endif 91 92 #endif /* _LINUXKPI_ASM_PGTABLE_H_ */ 93