1 /*- 2 * Copyright (c) 2010 Isilon Systems, Inc. 3 * Copyright (c) 2010 iX Systems, Inc. 4 * Copyright (c) 2010 Panasas, Inc. 5 * Copyright (c) 2013-2016 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 * $FreeBSD$ 30 */ 31 #ifndef _LINUX_PAGE_H_ 32 #define _LINUX_PAGE_H_ 33 34 #include <linux/types.h> 35 36 #include <sys/param.h> 37 #include <sys/vmmeter.h> 38 39 #include <machine/atomic.h> 40 #include <vm/vm.h> 41 #include <vm/vm_page.h> 42 #include <vm/pmap.h> 43 44 #if defined(__i386__) || defined(__amd64__) 45 #include <machine/md_var.h> 46 #endif 47 48 typedef unsigned long linux_pte_t; 49 typedef unsigned long linux_pmd_t; 50 typedef unsigned long linux_pgd_t; 51 typedef unsigned long pgprot_t; 52 53 #define page vm_page 54 55 #define LINUXKPI_PROT_VALID (1 << 3) 56 #define LINUXKPI_CACHE_MODE_SHIFT 4 57 58 CTASSERT((VM_PROT_ALL & -LINUXKPI_PROT_VALID) == 0); 59 60 #define PAGE_KERNEL_IO 0x0000 61 62 static inline pgprot_t 63 cachemode2protval(vm_memattr_t attr) 64 { 65 return ((attr << LINUXKPI_CACHE_MODE_SHIFT) | LINUXKPI_PROT_VALID); 66 } 67 68 static inline vm_memattr_t 69 pgprot2cachemode(pgprot_t prot) 70 { 71 if (prot & LINUXKPI_PROT_VALID) 72 return (prot >> LINUXKPI_CACHE_MODE_SHIFT); 73 else 74 return (VM_MEMATTR_DEFAULT); 75 } 76 77 #define virt_to_page(x) PHYS_TO_VM_PAGE(vtophys(x)) 78 #define page_to_pfn(pp) (VM_PAGE_TO_PHYS(pp) >> PAGE_SHIFT) 79 #define pfn_to_page(pfn) (PHYS_TO_VM_PAGE((pfn) << PAGE_SHIFT)) 80 #define nth_page(page,n) pfn_to_page(page_to_pfn(page) + (n)) 81 #define page_to_phys(page) VM_PAGE_TO_PHYS(page) 82 83 #define clear_page(page) memset(page, 0, PAGE_SIZE) 84 #define pgprot_noncached(prot) \ 85 (((prot) & VM_PROT_ALL) | cachemode2protval(VM_MEMATTR_UNCACHEABLE)) 86 #ifdef VM_MEMATTR_WRITE_COMBINING 87 #define pgprot_writecombine(prot) \ 88 (((prot) & VM_PROT_ALL) | cachemode2protval(VM_MEMATTR_WRITE_COMBINING)) 89 #else 90 #define pgprot_writecombine(prot) pgprot_noncached(prot) 91 #endif 92 93 #undef PAGE_MASK 94 #define PAGE_MASK (~(PAGE_SIZE-1)) 95 /* 96 * Modifying PAGE_MASK in the above way breaks trunc_page, round_page, 97 * and btoc macros. Therefore, redefine them in a way that makes sense 98 * so the LinuxKPI consumers don't get totally broken behavior. 99 */ 100 #undef btoc 101 #define btoc(x) (((vm_offset_t)(x) + PAGE_SIZE - 1) >> PAGE_SHIFT) 102 #undef round_page 103 #define round_page(x) ((((uintptr_t)(x)) + PAGE_SIZE - 1) & ~(PAGE_SIZE - 1)) 104 #undef trunc_page 105 #define trunc_page(x) ((uintptr_t)(x) & ~(PAGE_SIZE - 1)) 106 107 #if defined(__i386__) || defined(__amd64__) 108 #undef clflushopt 109 static inline void 110 lkpi_clflushopt(unsigned long addr) 111 { 112 if (cpu_stdext_feature & CPUID_STDEXT_CLFLUSHOPT) 113 clflushopt(addr); 114 else if (cpu_feature & CPUID_CLFSH) 115 clflush(addr); 116 else 117 pmap_invalidate_cache(); 118 } 119 #define clflushopt(x) lkpi_clflushopt((unsigned long)(x)) 120 #endif 121 122 #endif /* _LINUX_PAGE_H_ */ 123