osfmk/mach/i386/vm_param.h

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  31 /*
  32  * Mach Operating System
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  57 /*
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  59  * the Computer Systems Laboratory at the University of Utah (CSL).
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  78
  79 /*
  80  *      File:   vm_param.h
  81  *      Author: Avadis Tevanian, Jr.
  82  *      Date:   1985
  83  *
  84  *      I386 machine dependent virtual memory parameters.
  85  *      Most of the declarations are preceeded by I386_ (or i386_)
  86  *      which is OK because only I386 specific code will be using
  87  *      them.
  88  */
  89
  90 #ifndef _MACH_I386_VM_PARAM_H_
  91 #define _MACH_I386_VM_PARAM_H_
  92
  93 #define BYTE_SIZE               8               /* byte size in bits */
  94
  95 #define I386_PGBYTES            4096            /* bytes per 80386 page */
  96 #define I386_PGSHIFT            12              /* bitshift for pages */
  97
  98 #define PAGE_SIZE               I386_PGBYTES
  99 #define PAGE_SHIFT              I386_PGSHIFT
 100 #define PAGE_MASK               (PAGE_SIZE - 1)
 101
 102 #define I386_LPGBYTES           2*1024*1024     /* bytes per large page */
 103 #define I386_LPGSHIFT           21              /* bitshift for large pages */
 104 #define I386_LPGMASK            (I386_LPGBYTES-1)
 105
 106 /*
 107  *      Convert bytes to pages and convert pages to bytes.
 108  *      No rounding is used.
 109  */
 110
 111 #define i386_btop(x)            ((ppnum_t)((x) >> I386_PGSHIFT))
 112 #define machine_btop(x)         i386_btop(x)
 113 #define i386_ptob(x)            (((pmap_paddr_t)(x)) << I386_PGSHIFT)
 114
 115 /*
 116  *      Round off or truncate to the nearest page.  These will work
 117  *      for either addresses or counts.  (i.e. 1 byte rounds to 1 page
 118  *      bytes.
 119  */
 120
 121 #define i386_round_page(x)      ((((pmap_paddr_t)(x)) + I386_PGBYTES - 1) & \
 122                                         ~(I386_PGBYTES-1))
 123 #define i386_trunc_page(x)      (((pmap_paddr_t)(x)) & ~(I386_PGBYTES-1))
 124
 125
 126
 127 #define VM_MIN_ADDRESS64        ((user_addr_t) 0x0000000000000000ULL)
 128 /*
 129  * default top of user stack... it grows down from here
 130  */
 131 #define VM_USRSTACK64           ((user_addr_t) 0x00007FFF5FC00000ULL)
 132 #define VM_DYLD64               ((user_addr_t) 0x00007FFF5FC00000ULL)
 133 #define VM_LIB64_SHR_DATA       ((user_addr_t) 0x00007FFF60000000ULL)
 134 #define VM_LIB64_SHR_TEXT       ((user_addr_t) 0x00007FFF80000000ULL)
 135 /*
 136  * the end of the usable user address space , for now about 47 bits.
 137  * the 64 bit commpage is past the end of this
 138  */
 139 #define VM_MAX_PAGE_ADDRESS     ((user_addr_t) 0x00007FFFFFE00000ULL)
 140 /*
 141  * canonical end of user address space for limits checking
 142  */
 143 #define VM_MAX_USER_PAGE_ADDRESS ((user_addr_t)0x00007FFFFFFFF000ULL)
 144
 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_PAGE_ADDRESS)
 149
 150 /* process-relative values (all 32-bit legacy only for now) */
 151 #define VM_MIN_ADDRESS          ((vm_offset_t) 0)
 152 #define VM_USRSTACK32           ((vm_offset_t) 0xC0000000)
 153 #define VM_MAX_ADDRESS          ((vm_offset_t) 0xFFE00000)
 154
 155
 156 #ifdef  KERNEL_PRIVATE
 157
 158 /* Kernel-wide values */
 159
 160 #define KB              (1024ULL)
 161 #define MB              (1024*KB)
 162 #define GB              (1024*MB)
 163
 164 /*
 165  * Maximum physical memory supported.
 166  */
 167 #define K32_MAXMEM      (32*GB)
 168 #define K64_MAXMEM      (96*GB)
 169 #if defined(__i386__)
 170 #define KERNEL_MAXMEM   K32_MAXMEM
 171 #else
 172 #define KERNEL_MAXMEM   K64_MAXMEM
 173 #endif
 174
 175 /*
 176  * XXX
 177  * The kernel max VM address is limited to 0xFF3FFFFF for now because
 178  * some data structures are explicitly allocated at 0xFF400000 without
 179  * VM's knowledge (see osfmk/i386/locore.s for the allocation of PTmap and co.).
 180  * We can't let VM allocate memory from there.
 181  */
 182
 183 #if defined(__i386__)
 184
 185 #define VM_MIN_KERNEL_ADDRESS   ((vm_offset_t) 0x00001000U)
 186 #define VM_MIN_KERNEL_AND_KEXT_ADDRESS VM_MIN_KERNEL_ADDRESS
 187
 188 #define VM_MAX_KERNEL_ADDRESS   ((vm_offset_t) 0xFE7FFFFFU)
 189 #define KERNEL_STACK_SIZE               (I386_PGBYTES*4)
 190
 191 #elif defined(__x86_64__)
 192
 193 #define VM_MIN_KERNEL_ADDRESS   ((vm_offset_t) 0xFFFFFF8000000000UL)
 194 #define VM_MIN_KERNEL_AND_KEXT_ADDRESS (VM_MIN_KERNEL_ADDRESS - 0x80000000ULL)
 195
 196 #define VM_MAX_KERNEL_ADDRESS   ((vm_offset_t) 0xFFFFFFFFFFFFEFFFUL)
 197 #define KERNEL_STACK_SIZE               (I386_PGBYTES*4)
 198
 199 #else
 200 #error unsupported architecture
 201 #endif
 202
 203 #define VM_MAP_MIN_ADDRESS      MACH_VM_MIN_ADDRESS
 204 #define VM_MAP_MAX_ADDRESS      MACH_VM_MAX_ADDRESS
 205
 206 /* FIXME  - always leave like this? */
 207 #define INTSTACK_SIZE   (I386_PGBYTES*4)
 208
 209 #ifdef  MACH_KERNEL_PRIVATE
 210
 211 /* For implementing legacy 32-bit interfaces */
 212 #define VM32_SUPPORT                    1
 213 #define VM32_MIN_ADDRESS                ((vm32_offset_t) 0)
 214 #define VM32_MAX_ADDRESS                ((vm32_offset_t) (VM_MAX_PAGE_ADDRESS & 0xFFFFFFFF))
 215
 216 #if defined(__i386__)
 217
 218 #define LINEAR_KERNEL_ADDRESS   ((vm_offset_t) 0x00000000)
 219
 220 #define VM_MIN_KERNEL_LOADED_ADDRESS    ((vm_offset_t) 0x00000000U)
 221 #define VM_MAX_KERNEL_LOADED_ADDRESS    ((vm_offset_t) 0x1FFFFFFFU)
 222
 223 #define NCOPY_WINDOWS 4
 224
 225 #elif defined(__x86_64__)
 226
 227 #define LINEAR_KERNEL_ADDRESS   ((vm_offset_t) 0x00000000)
 228
 229 #define VM_MIN_KERNEL_LOADED_ADDRESS    ((vm_offset_t) 0xFFFFFF8000000000UL)
 230 #define VM_MAX_KERNEL_LOADED_ADDRESS    ((vm_offset_t) 0xFFFFFF801FFFFFFFUL)
 231
 232 #define NCOPY_WINDOWS 0
 233
 234 #else
 235 #error unsupported architecture
 236 #endif
 237
 238 /*
 239  *      Conversion between 80386 pages and VM pages
 240  */
 241
 242 #define trunc_i386_to_vm(p)     (atop(trunc_page(i386_ptob(p))))
 243 #define round_i386_to_vm(p)     (atop(round_page(i386_ptob(p))))
 244 #define vm_to_i386(p)           (i386_btop(ptoa(p)))
 245
 246 #define PMAP_ENTER(pmap, virtual_address, page, protection, flags, wired) \
 247         MACRO_BEGIN                                     \
 248         pmap_t __pmap = (pmap);                         \
 249         vm_page_t __page = (page);                      \
 250         vm_prot_t __prot__ =  (protection);             \
 251                                                         \
 252         if (__pmap == kernel_pmap) {                    \
 253                 __prot__ |= VM_PROT_WRITE;              \
 254         } else {                                        \
 255                 assert(!__page->encrypted);             \
 256         }                                               \
 257                                                         \
 258         pmap_enter(                                     \
 259                 __pmap,                                 \
 260                 (virtual_address),                      \
 261                 __page->phys_page,                      \
 262                 __prot__,                               \
 263                 flags,                                  \
 264                 (wired)                                 \
 265          );                                             \
 266         MACRO_END
 267
 268 #define PMAP_ENTER_OPTIONS(pmap, virtual_address, page, protection,     \
 269                                 flags, wired, options, result)          \
 270         MACRO_BEGIN                                                     \
 271                 result=KERN_SUCCESS;                                    \
 272                 PMAP_ENTER(pmap, virtual_address, page, protection,     \
 273                                 flags, wired);                          \
 274         MACRO_END
 275
 276 #define IS_USERADDR64_CANONICAL(addr)                   \
 277         ((addr) < (VM_MAX_USER_PAGE_ADDRESS + PAGE_SIZE))
 278
 279 #endif  /* MACH_KERNEL_PRIVATE */
 280
 281 #endif  /* KERNEL_PRIVATE */
 282
 283 #endif  /* _MACH_I386_VM_PARAM_H_ */