1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 /* 22 * Copyright (c) 1992, 2010, Oracle and/or its affiliates. All rights reserved. 23 * Copyright 2016 Joyent, Inc. 24 */ 25 26 /* Copyright (c) 1988 AT&T */ 27 /* All Rights Reserved */ 28 29 30 #ifndef _SYS_MACHPARAM_H 31 #define _SYS_MACHPARAM_H 32 33 #if !defined(_ASM) 34 #include <sys/types.h> 35 36 #if defined(__xpv) 37 #include <sys/xpv_impl.h> 38 #endif 39 40 #endif 41 42 #ifdef __cplusplus 43 extern "C" { 44 #endif 45 46 #ifndef _ASM 47 #define ADDRESS_C(c) c ## ul 48 #else /* _ASM */ 49 #define ADDRESS_C(c) (c) 50 #endif /* _ASM */ 51 52 /* 53 * Machine dependent parameters and limits. 54 */ 55 56 #if defined(__amd64) 57 /* 58 * If NCPU grows beyond 256, sizing for the x86 comm page will require 59 * adjustment. 60 */ 61 #define NCPU 256 62 #define NCPU_LOG2 8 63 #elif defined(__i386) 64 #define NCPU 32 65 #define NCPU_LOG2 5 66 #endif 67 68 /* NCPU_P2 is NCPU rounded to a power of 2 */ 69 #define NCPU_P2 (1 << NCPU_LOG2) 70 71 /* 72 * The value defined below could grow to 16. hat structure and 73 * page_t have room for 16 nodes. 74 */ 75 #define MAXNODES 4 76 #define NUMA_NODEMASK 0x0f 77 78 /* 79 * Define the FPU symbol if we could run on a machine with an external 80 * FPU (i.e. not integrated with the normal machine state like the vax). 81 * 82 * The fpu is defined in the architecture manual, and the kernel hides 83 * its absence if it is not present, that's pretty integrated, no? 84 */ 85 86 /* supported page sizes */ 87 #define MMU_PAGE_SIZES 3 88 89 /* 90 * MMU_PAGES* describes the physical page size used by the mapping hardware. 91 * PAGES* describes the logical page size used by the system. 92 */ 93 94 #define MMU_PAGESIZE 0x1000 /* 4096 bytes */ 95 #define MMU_PAGESHIFT 12 /* log2(MMU_PAGESIZE) */ 96 97 #if !defined(_ASM) 98 #define MMU_PAGEOFFSET (MMU_PAGESIZE-1) /* Mask of address bits in page */ 99 #else /* _ASM */ 100 #define MMU_PAGEOFFSET _CONST(MMU_PAGESIZE-1) /* assembler lameness */ 101 #endif /* _ASM */ 102 103 #define MMU_PAGEMASK (~MMU_PAGEOFFSET) 104 105 #define PAGESIZE 0x1000 /* All of the above, for logical */ 106 #define PAGESHIFT 12 107 #define PAGEOFFSET (PAGESIZE - 1) 108 #define PAGEMASK (~PAGEOFFSET) 109 110 /* 111 * DATA_ALIGN is used to define the alignment of the Unix data segment. 112 */ 113 #define DATA_ALIGN PAGESIZE 114 115 /* 116 * DEFAULT KERNEL THREAD stack size (in pages). 117 */ 118 #if defined(__amd64) 119 #define DEFAULTSTKSZ_NPGS 5 120 #elif defined(__i386) 121 #define DEFAULTSTKSZ_NPGS 3 122 #endif 123 124 #if !defined(_ASM) 125 #define DEFAULTSTKSZ (DEFAULTSTKSZ_NPGS * PAGESIZE) 126 #else /* !_ASM */ 127 #define DEFAULTSTKSZ _MUL(DEFAULTSTKSZ_NPGS, PAGESIZE) /* as(1) lameness */ 128 #endif /* !_ASM */ 129 130 /* 131 * KERNELBASE is the virtual address at which the kernel segments start in 132 * all contexts. 133 * 134 * KERNELBASE is not fixed. The value of KERNELBASE can change with 135 * installed memory or on 32 bit systems the eprom variable 'eprom_kernelbase'. 136 * 137 * common/conf/param.c requires a compile time defined value for KERNELBASE. 138 * This value is save in the variable _kernelbase. _kernelbase may then be 139 * modified with to a different value in i86pc/os/startup.c. 140 * 141 * Most code should be using kernelbase, which resolves to a reference to 142 * _kernelbase. 143 */ 144 #define KERNEL_TEXT_amd64 UINT64_C(0xfffffffffb800000) 145 146 #ifdef __i386 147 148 #define KERNEL_TEXT_i386 ADDRESS_C(0xfe800000) 149 150 /* 151 * We don't use HYPERVISOR_VIRT_START, as we need both the PAE and non-PAE 152 * versions in our code. We always compile based on the lower PAE address. 153 */ 154 #define KERNEL_TEXT_i386_xpv \ 155 (HYPERVISOR_VIRT_START_PAE - 3 * ADDRESS_C(0x400000)) 156 157 #endif /* __i386 */ 158 159 #if defined(__amd64) 160 161 #define KERNELBASE ADDRESS_C(0xfffffd8000000000) 162 163 /* 164 * Size of the unmapped "red zone" at the very bottom of the kernel's 165 * address space. Corresponds to 1 slot in the toplevel pagetable. 166 */ 167 #define KERNEL_REDZONE_SIZE ((uintptr_t)1 << 39) 168 169 /* 170 * Base of 'core' heap area, which is used for kernel and module text/data 171 * that must be within a 2GB range to allow for rip-relative addressing. 172 */ 173 #define COREHEAP_BASE ADDRESS_C(0xffffffffc0000000) 174 175 /* 176 * Beginning of the segkpm window. A lower value than this is used if 177 * physical addresses exceed 1TB. See i86pc/os/startup.c 178 */ 179 #define SEGKPM_BASE ADDRESS_C(0xfffffe0000000000) 180 181 /* 182 * This is valloc_base, above seg_kpm, but below everything else. 183 * A lower value than this may be used if SEGKPM_BASE is adjusted. 184 * See i86pc/os/startup.c 185 */ 186 #define VALLOC_BASE ADDRESS_C(0xffffff0000000000) 187 188 /* 189 * default and boundary sizes for segkp 190 */ 191 #define SEGKPDEFSIZE (2L * 1024L * 1024L * 1024L) /* 2G */ 192 #define SEGKPMAXSIZE (8L * 1024L * 1024L * 1024L) /* 8G */ 193 #define SEGKPMINSIZE (200L * 1024 * 1024L) /* 200M */ 194 195 /* 196 * minimum size for segzio 197 */ 198 #define SEGZIOMINSIZE (400L * 1024 * 1024L) /* 400M */ 199 #define SEGZIOMAXSIZE (512L * 1024L * 1024L * 1024L) /* 512G */ 200 201 /* 202 * During intial boot we limit heap to the top 4Gig. 203 */ 204 #define BOOT_KERNELHEAP_BASE ADDRESS_C(0xffffffff00000000) 205 206 /* 207 * VMWare works best if we don't use the top 64Meg of memory for amd64. 208 * Set KERNEL_TEXT to top_o_memory - 64Meg - 8 Meg for 8Meg of nucleus pages. 209 */ 210 #define PROMSTART ADDRESS_C(0xffc00000) 211 #define KERNEL_TEXT KERNEL_TEXT_amd64 212 213 /* 214 * Virtual address range available to the debugger 215 */ 216 #define SEGDEBUGBASE ADDRESS_C(0xffffffffff800000) 217 #define SEGDEBUGSIZE ADDRESS_C(0x400000) 218 219 /* 220 * Define upper limit on user address space 221 * 222 * In amd64, the upper limit on a 64-bit user address space is 1 large page 223 * (2MB) below kernelbase. The upper limit for a 32-bit user address space 224 * is 1 small page (4KB) below the top of the 32-bit range. The 64-bit 225 * limit give dtrace the red zone it needs below kernelbase. The 32-bit 226 * limit gives us a small red zone to detect address-space overruns in a 227 * user program. 228 * 229 * On the hypervisor, we limit the user to memory below the VA hole. 230 * Subtract 1 large page for a red zone. 231 */ 232 #if defined(__xpv) 233 #define USERLIMIT ADDRESS_C(0x00007fffffe00000) 234 #else 235 #define USERLIMIT ADDRESS_C(0xfffffd7fffe00000) 236 #endif 237 238 #ifdef bug_5074717_is_fixed 239 #define USERLIMIT32 ADDRESS_C(0xfffff000) 240 #else 241 #define USERLIMIT32 ADDRESS_C(0xfefff000) 242 #endif 243 244 #elif defined(__i386) 245 246 #ifdef DEBUG 247 #define KERNELBASE ADDRESS_C(0xc8000000) 248 #else 249 #define KERNELBASE ADDRESS_C(0xd4000000) 250 #endif 251 252 #define KERNELBASE_MAX ADDRESS_C(0xe0000000) 253 254 /* 255 * The i386 ABI requires that the user address space be at least 3Gb 256 * in size. KERNELBASE_ABI_MIN is used as the default KERNELBASE for 257 * physical memory configurations > 4gb. 258 */ 259 #define KERNELBASE_ABI_MIN ADDRESS_C(0xc0000000) 260 261 /* 262 * Size of the unmapped "red zone" at the very bottom of the kernel's 263 * address space. Since segmap start immediately above the red zone, this 264 * needs to be MAXBSIZE aligned. 265 */ 266 #define KERNEL_REDZONE_SIZE MAXBSIZE 267 268 /* 269 * This is the last 4MB of the 4G address space. Some psm modules 270 * need this region of virtual address space mapped 1-1 271 * The top 64MB of the address space is reserved for the hypervisor. 272 */ 273 #define PROMSTART ADDRESS_C(0xffc00000) 274 #ifdef __xpv 275 #define KERNEL_TEXT KERNEL_TEXT_i386_xpv 276 #else 277 #define KERNEL_TEXT KERNEL_TEXT_i386 278 #endif 279 280 /* 281 * Virtual address range available to the debugger 282 * We place it just above the kernel text (4M) and kernel data (4M). 283 */ 284 #define SEGDEBUGBASE (KERNEL_TEXT + ADDRESS_C(0x800000)) 285 #define SEGDEBUGSIZE ADDRESS_C(0x400000) 286 287 /* 288 * Define upper limit on user address space 289 */ 290 #define USERLIMIT KERNELBASE 291 #define USERLIMIT32 USERLIMIT 292 293 #endif /* __i386 */ 294 295 /* 296 * Reserve pages just below KERNEL_TEXT for the GDT, IDT, TSS and debug info. 297 * 298 * For now, DEBUG_INFO_VA must be first in this list for "xm" initiated dumps 299 * of solaris domUs to be usable with mdb. Relying on a fixed VA is not viable 300 * long term, but it's the best we've got for now. 301 */ 302 #if !defined(_ASM) 303 #define DEBUG_INFO_VA (KERNEL_TEXT - MMU_PAGESIZE) 304 #define GDT_VA (DEBUG_INFO_VA - MMU_PAGESIZE) 305 #define IDT_VA (GDT_VA - MMU_PAGESIZE) 306 #define KTSS_VA (IDT_VA - MMU_PAGESIZE) 307 #define DFTSS_VA (KTSS_VA - MMU_PAGESIZE) 308 #define MISC_VA_BASE (DFTSS_VA) 309 #define MISC_VA_SIZE (KERNEL_TEXT - MISC_VA_BASE) 310 #endif /* !_ASM */ 311 312 #if !defined(_ASM) && !defined(_KMDB) 313 extern uintptr_t kernelbase, segmap_start, segmapsize; 314 #endif 315 316 /* 317 * ARGSBASE is the base virtual address of the range which 318 * the kernel uses to map the arguments for exec. 319 */ 320 #define ARGSBASE PROMSTART 321 322 /* 323 * reserve space for modules 324 */ 325 #define MODTEXT (1024 * 1024 * 2) 326 #define MODDATA (1024 * 300) 327 328 /* 329 * The heap has a region allocated from it of HEAPTEXT_SIZE bytes specifically 330 * for module text. 331 */ 332 #define HEAPTEXT_SIZE (64 * 1024 * 1024) /* bytes */ 333 334 /* 335 * Size of a kernel threads stack. It must be a whole number of pages 336 * since the segment it comes from will only allocate space in pages. 337 */ 338 #define T_STACKSZ 2*PAGESIZE 339 340 /* 341 * Size of a cpu startup thread stack. (It must be a whole number of pages 342 * since the containing segment only allocates space in pages.) 343 */ 344 345 #define STARTUP_STKSZ 3*PAGESIZE 346 347 /* 348 * Bus types 349 */ 350 #define BTISA 1 351 #define BTEISA 2 352 #define BTMCA 3 353 354 #ifdef __cplusplus 355 } 356 #endif 357 358 #endif /* _SYS_MACHPARAM_H */ 359