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     ((mach_vm_offset_t) 0x0ULL)
 157 #define MACH_VM_MAX_ADDRESS     ((mach_vm_offset_t) 0x0000000FC0000000ULL)
 158
 159 #else
 160 #error architecture not supported
 161 #endif
 162
 163 #define VM_MAP_MIN_ADDRESS      VM_MIN_ADDRESS
 164 #define VM_MAP_MAX_ADDRESS      VM_MAX_ADDRESS
 165
 166 #ifdef  KERNEL
 167
 168 #if defined (__arm__)
 169 #define VM_MIN_KERNEL_ADDRESS   ((vm_address_t) 0x80000000)
 170 #define VM_MAX_KERNEL_ADDRESS   ((vm_address_t) 0xFFFEFFFF)
 171 #define VM_HIGH_KERNEL_WINDOW   ((vm_address_t) 0xFFFE0000)
 172 #elif defined (__arm64__)
 173 /*
 174  * The minimum and maximum kernel address; some configurations may
 175  * constrain the address space further.
 176  */
 177 #define VM_MIN_KERNEL_ADDRESS   ((vm_address_t) 0xffffffe000000000ULL)
 178 #define VM_MAX_KERNEL_ADDRESS   ((vm_address_t) 0xfffffff3ffffffffULL)
 179 #else
 180 #error architecture not supported
 181 #endif
 182
 183 #define VM_MIN_KERNEL_AND_KEXT_ADDRESS  \
 184                                 VM_MIN_KERNEL_ADDRESS
 185
 186 #define VM_KERNEL_ADDRESS(va)   ((((vm_address_t)(va))>=VM_MIN_KERNEL_ADDRESS) && \
 187                                 (((vm_address_t)(va))<=VM_MAX_KERNEL_ADDRESS))
 188
 189 #ifdef  MACH_KERNEL_PRIVATE
 190 /*
 191  *      Physical memory is mapped linearly at an offset virtual memory.
 192  */
 193 extern unsigned long            gVirtBase, gPhysBase, gPhysSize;
 194
 195 #define isphysmem(a)            (((vm_address_t)(a) - gPhysBase) < gPhysSize)
 196 #define phystokv(a)             ((vm_address_t)(a) - gPhysBase + gVirtBase)
 197
 198 #if KASAN
 199 /* Increase the stack sizes to account for the redzones that get added to every
 200  * stack object. */
 201 # define KERNEL_STACK_SIZE      (4*4*4096)
 202 # define INTSTACK_SIZE          (4*4*4096)
 203 #else
 204 # define KERNEL_STACK_SIZE      (4*4096)
 205 # define INTSTACK_SIZE          (4*4096)
 206 #endif
 207
 208 #if defined (__arm__)
 209 #define HIGH_EXC_VECTORS        ((vm_address_t) 0xFFFF0000)
 210 #endif
 211
 212 #endif  /* MACH_KERNEL_PRIVATE */
 213 #endif  /* KERNEL */
 214
 215 #endif  /* !__ASSEMBLER__ */
 216
 217 #define SWI_SYSCALL     0x80
 218
 219 #endif  /* _MACH_ARM_VM_PARAM_H_ */