osfmk/mach/arm/vm_param.h

   1 /*
   2  * Copyright (c) 2007 Apple Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. The rights granted to you under the License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28 /*
  29  * FILE_ID: vm_param.h
  30  */
  31
  32 /*
  33  *      ARM machine dependent virtual memory parameters.
  34  */
  35
  36 #ifndef _MACH_ARM_VM_PARAM_H_
  37 #define _MACH_ARM_VM_PARAM_H_
  38
  39 #if defined(KERNEL_PRIVATE) && __ARM_16K_PG__
  40 #include <arm64/proc_reg.h>
  41 #endif
  42
  43 #if !defined (KERNEL) && !defined (__ASSEMBLER__)
  44 #include <mach/vm_page_size.h>
  45 #endif
  46
  47 #define BYTE_SIZE       8       /* byte size in bits */
  48
  49 #if defined (KERNEL)
  50
  51 #ifndef __ASSEMBLER__
  52
  53 #ifdef  __arm__
  54 #define PAGE_SHIFT_CONST        12
  55 #elif defined(__arm64__)
  56 extern unsigned         PAGE_SHIFT_CONST;
  57 #else
  58 #error Unsupported arch
  59 #endif
  60
  61 #if defined(KERNEL_PRIVATE) && __ARM_16K_PG__
  62 #define PAGE_SHIFT              ARM_PGSHIFT
  63 #else
  64 #define PAGE_SHIFT              PAGE_SHIFT_CONST
  65 #endif
  66 #define PAGE_SIZE               (1 << PAGE_SHIFT)
  67 #define PAGE_MASK               (PAGE_SIZE-1)
  68
  69 #define VM_PAGE_SIZE            PAGE_SIZE
  70
  71 #define machine_ptob(x)         ((x) << PAGE_SHIFT)
  72
  73 /*
  74  * Defined for the purpose of testing the pmap advertised page
  75  * size; this does not necessarily match the hardware page size.
  76  */
  77 #define TEST_PAGE_SIZE_16K      ((PAGE_SHIFT_CONST == 14))
  78 #define TEST_PAGE_SIZE_4K       ((PAGE_SHIFT_CONST == 12))
  79
  80 #endif  /* !__ASSEMBLER__ */
  81
  82 #else
  83
  84 #define PAGE_SHIFT                      vm_page_shift
  85 #define PAGE_SIZE                       vm_page_size
  86 #define PAGE_MASK                       vm_page_mask
  87
  88 #define VM_PAGE_SIZE            vm_page_size
  89
  90 #define machine_ptob(x)         ((x) << PAGE_SHIFT)
  91
  92 #endif
  93
  94 #define PAGE_MAX_SHIFT          14
  95 #define PAGE_MAX_SIZE           (1 << PAGE_MAX_SHIFT)
  96 #define PAGE_MAX_MASK           (PAGE_MAX_SIZE-1)
  97
  98 #define PAGE_MIN_SHIFT          12
  99 #define PAGE_MIN_SIZE           (1 << PAGE_MIN_SHIFT)
 100 #define PAGE_MIN_MASK           (PAGE_MIN_SIZE-1)
 101
 102 #ifndef __ASSEMBLER__
 103
 104 #ifdef  MACH_KERNEL_PRIVATE
 105
 106 #define VM32_SUPPORT            1
 107 #define VM32_MIN_ADDRESS        ((vm32_offset_t) 0)
 108 #define VM32_MAX_ADDRESS        ((vm32_offset_t) (VM_MAX_PAGE_ADDRESS & 0xFFFFFFFF))
 109 #define VM_MAX_PAGE_ADDRESS     VM_MAX_ADDRESS  /* ARM64_TODO: ?? */
 110
 111 /*
 112  * kalloc() parameters:
 113  *
 114  * Historically kalloc's underlying zones were power-of-2 sizes, with a
 115  * KALLOC_MINSIZE of 16 bytes.  Thus the allocator ensured that
 116  * (sizeof == alignof) >= 16 for all kalloc allocations.
 117  *
 118  * Today kalloc may use zones with intermediate (small) sizes, constrained by
 119  * KALLOC_MINSIZE and a minimum alignment, expressed by KALLOC_LOG2_MINALIGN.
 120  *
 121  * Note that most dynamically allocated data structures contain more than
 122  * one int/long/pointer member, so KALLOC_MINSIZE should probably start at 8.
 123  */
 124
 125 #if defined (__arm__)
 126
 127 #define KALLOC_MINSIZE          8       /* minimum allocation size */
 128 #define KALLOC_LOG2_MINALIGN    3       /* log2 minimum alignment */
 129
 130 #elif defined(__arm64__)
 131
 132 #define KALLOC_MINSIZE          16      /* minimum allocation size */
 133 #define KALLOC_LOG2_MINALIGN    4       /* log2 minimum alignment */
 134
 135 #else
 136 #error Unsupported arch
 137 #endif
 138
 139 #endif
 140
 141 #if defined (__arm__)
 142
 143 #define VM_MIN_ADDRESS          ((vm_address_t) 0x00000000)
 144 #define VM_MAX_ADDRESS          ((vm_address_t) 0x80000000)
 145
 146 /* system-wide values */
 147 #define MACH_VM_MIN_ADDRESS     ((mach_vm_offset_t) 0)
 148 #define MACH_VM_MAX_ADDRESS     ((mach_vm_offset_t) VM_MAX_ADDRESS)
 149
 150 #elif defined (__arm64__)
 151
 152 #define VM_MIN_ADDRESS          ((vm_address_t) 0x0000000000000000ULL)
 153 #define VM_MAX_ADDRESS          ((vm_address_t) 0x0000000080000000ULL)
 154
 155 /* system-wide values */
 156 #define MACH_VM_MIN_ADDRESS_RAW 0x0ULL
 157 #define MACH_VM_MAX_ADDRESS_RAW 0x0000000FC0000000ULL
 158 #define MACH_VM_MIN_ADDRESS     ((mach_vm_offset_t) MACH_VM_MIN_ADDRESS_RAW)
 159 #define MACH_VM_MAX_ADDRESS     ((mach_vm_offset_t) MACH_VM_MAX_ADDRESS_RAW)
 160
 161
 162 #else
 163 #error architecture not supported
 164 #endif
 165
 166 #define VM_MAP_MIN_ADDRESS      VM_MIN_ADDRESS
 167 #define VM_MAP_MAX_ADDRESS      VM_MAX_ADDRESS
 168
 169 #ifdef  KERNEL
 170
 171 #if defined (__arm__)
 172 #define VM_KERNEL_POINTER_SIGNIFICANT_BITS  32
 173 #define VM_MIN_KERNEL_ADDRESS   ((vm_address_t) 0x80000000)
 174 #define VM_MAX_KERNEL_ADDRESS   ((vm_address_t) 0xFFFEFFFF)
 175 #define VM_HIGH_KERNEL_WINDOW   ((vm_address_t) 0xFFFE0000)
 176 #elif defined (__arm64__)
 177 /*
 178  * The minimum and maximum kernel address; some configurations may
 179  * constrain the address space further.
 180  */
 181 #define VM_KERNEL_POINTER_SIGNIFICANT_BITS  37
 182 #define VM_MIN_KERNEL_ADDRESS   ((vm_address_t) 0xffffffe000000000ULL)
 183 #define VM_MAX_KERNEL_ADDRESS   ((vm_address_t) 0xfffffffbffffffffULL)
 184 #else
 185 #error architecture not supported
 186 #endif
 187
 188 #define VM_MIN_KERNEL_AND_KEXT_ADDRESS  \
 189                                 VM_MIN_KERNEL_ADDRESS
 190
 191 #if __has_feature(ptrauth_calls)
 192 #include <ptrauth.h>
 193 #define VM_KERNEL_STRIP_PTR(_v) (ptrauth_strip((void *)(uintptr_t)(_v), ptrauth_key_asia))
 194 #else /* !ptrauth_calls */
 195 #define VM_KERNEL_STRIP_PTR(_v) (_v)
 196 #endif /* ptrauth_calls */
 197
 198 #define VM_KERNEL_ADDRESS(_va)  \
 199         ((((vm_address_t)VM_KERNEL_STRIP_PTR(_va)) >= VM_MIN_KERNEL_ADDRESS) && \
 200          (((vm_address_t)VM_KERNEL_STRIP_PTR(_va)) <= VM_MAX_KERNEL_ADDRESS))
 201
 202 #ifdef  MACH_KERNEL_PRIVATE
 203 /*
 204  *      Physical memory is mapped linearly at an offset virtual memory.
 205  */
 206 extern unsigned long            gVirtBase, gPhysBase, gPhysSize;
 207
 208 #define isphysmem(a)            (((vm_address_t)(a) - gPhysBase) < gPhysSize)
 209 #define physmap_enclosed(a)     isphysmem(a)
 210
 211 #if KASAN
 212 /* Increase the stack sizes to account for the redzones that get added to every
 213  * stack object. */
 214 # define KERNEL_STACK_SIZE      (4*4*4096)
 215 #elif DEBUG
 216 /**
 217  * Increase the stack size to account for less efficient use of stack space when
 218  * compiling with -O0.
 219  */
 220 # define KERNEL_STACK_SIZE      (2*4*4096)
 221 #else
 222 # define KERNEL_STACK_SIZE      (4*4096)
 223 #endif
 224
 225 #define INTSTACK_SIZE           (4*4096)
 226
 227 #ifdef __arm64__
 228 #define EXCEPSTACK_SIZE         (4*4096)
 229 #else
 230 #define FIQSTACK_SIZE           (4096)
 231 #endif
 232
 233 #if defined (__arm__)
 234 #define HIGH_EXC_VECTORS        ((vm_address_t) 0xFFFF0000)
 235 #endif
 236
 237 /*
 238  * TODO: We're hardcoding the expected virtual TEXT base here;
 239  * that gives us an ugly dependency on a linker argument in
 240  * the make files.  Clean this up, so we don't hardcode it
 241  * twice; this is nothing but trouble.
 242  */
 243 #if defined (__arm__)
 244 #define VM_KERNEL_LINK_ADDRESS  ((vm_address_t) 0x80000000)
 245 #elif defined (__arm64__)
 246 #define VM_KERNEL_LINK_ADDRESS  ((vm_address_t) 0xFFFFFFF007004000)
 247 #else
 248 #error architecture not supported
 249 #endif
 250
 251 #endif  /* MACH_KERNEL_PRIVATE */
 252 #endif  /* KERNEL */
 253
 254 #endif  /* !__ASSEMBLER__ */
 255
 256 #define SWI_SYSCALL     0x80
 257
 258 #endif  /* _MACH_ARM_VM_PARAM_H_ */