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 (c) 2015 by Delphix. All rights reserved. 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 #define NCPU 256 58 #define NCPU_LOG2 8 59 #elif defined(__i386) 60 #define NCPU 32 61 #define NCPU_LOG2 5 62 #endif 63 64 /* NCPU_P2 is NCPU rounded to a power of 2 */ 65 #define NCPU_P2 (1 << NCPU_LOG2) 66 67 /* 68 * The value defined below could grow to 16. hat structure and 69 * page_t have room for 16 nodes. 70 */ 71 #define MAXNODES 4 72 #define NUMA_NODEMASK 0x0f 73 74 /* 75 * Define the FPU symbol if we could run on a machine with an external 76 * FPU (i.e. not integrated with the normal machine state like the vax). 77 * 78 * The fpu is defined in the architecture manual, and the kernel hides 79 * its absence if it is not present, that's pretty integrated, no? 80 */ 81 82 /* supported page sizes */ 83 #define MMU_PAGE_SIZES 3 84 85 /* 86 * MMU_PAGES* describes the physical page size used by the mapping hardware. 87 * PAGES* describes the logical page size used by the system. 88 */ 89 90 #define MMU_PAGESIZE 0x1000 /* 4096 bytes */ 91 #define MMU_PAGESHIFT 12 /* log2(MMU_PAGESIZE) */ 92 93 #if !defined(_ASM) 94 #define MMU_PAGEOFFSET (MMU_PAGESIZE-1) /* Mask of address bits in page */ 95 #else /* _ASM */ 96 #define MMU_PAGEOFFSET _CONST(MMU_PAGESIZE-1) /* assembler lameness */ 97 #endif /* _ASM */ 98 99 #define MMU_PAGEMASK (~MMU_PAGEOFFSET) 100 101 #define PAGESIZE 0x1000 /* All of the above, for logical */ 102 #define PAGESHIFT 12 103 #define PAGEOFFSET (PAGESIZE - 1) 104 #define PAGEMASK (~PAGEOFFSET) 105 106 /* 107 * DATA_ALIGN is used to define the alignment of the Unix data segment. 108 */ 109 #define DATA_ALIGN PAGESIZE 110 111 /* 112 * DEFAULT KERNEL THREAD stack size (in pages). 113 */ 114 #if defined(__amd64) 115 #define DEFAULTSTKSZ_NPGS 5 116 #elif defined(__i386) 117 #define DEFAULTSTKSZ_NPGS 3 118 #endif 119 120 #if !defined(_ASM) 121 #define DEFAULTSTKSZ (DEFAULTSTKSZ_NPGS * PAGESIZE) 122 #else /* !_ASM */ 123 #define DEFAULTSTKSZ _MUL(DEFAULTSTKSZ_NPGS, PAGESIZE) /* as(1) lameness */ 124 #endif /* !_ASM */ 125 126 /* 127 * KERNELBASE is the virtual address at which the kernel segments start in 128 * all contexts. 129 * 130 * KERNELBASE is not fixed. The value of KERNELBASE can change with 131 * installed memory or on 32 bit systems the eprom variable 'eprom_kernelbase'. 132 * 133 * common/conf/param.c requires a compile time defined value for KERNELBASE. 134 * This value is save in the variable _kernelbase. _kernelbase may then be 135 * modified with to a different value in i86pc/os/startup.c. 136 * 137 * Most code should be using kernelbase, which resolves to a reference to 138 * _kernelbase. 139 */ 140 #define KERNEL_TEXT_amd64 UINT64_C(0xfffffffffb800000) 141 142 #ifdef __i386 143 144 #define KERNEL_TEXT_i386 ADDRESS_C(0xfe800000) 145 146 /* 147 * We don't use HYPERVISOR_VIRT_START, as we need both the PAE and non-PAE 148 * versions in our code. We always compile based on the lower PAE address. 149 */ 150 #define KERNEL_TEXT_i386_xpv \ 151 (HYPERVISOR_VIRT_START_PAE - 3 * ADDRESS_C(0x400000)) 152 153 #endif /* __i386 */ 154 155 #if defined(__amd64) 156 157 #define KERNELBASE ADDRESS_C(0xfffffd8000000000) 158 159 /* 160 * Size of the unmapped "red zone" at the very bottom of the kernel's 161 * address space. Corresponds to 1 slot in the toplevel pagetable. 162 */ 163 #define KERNEL_REDZONE_SIZE ((uintptr_t)1 << 39) 164 165 /* 166 * Base of 'core' heap area, which is used for kernel and module text/data 167 * that must be within a 2GB range to allow for rip-relative addressing. 168 */ 169 #define COREHEAP_BASE ADDRESS_C(0xffffffffc0000000) 170 171 /* 172 * Beginning of the segkpm window. A lower value than this is used if 173 * physical addresses exceed 1TB. See i86pc/os/startup.c 174 */ 175 #define SEGKPM_BASE ADDRESS_C(0xfffffe0000000000) 176 177 /* 178 * This is valloc_base, above seg_kpm, but below everything else. 179 * A lower value than this may be used if SEGKPM_BASE is adjusted. 180 * See i86pc/os/startup.c 181 */ 182 #define VALLOC_BASE ADDRESS_C(0xffffff0000000000) 183 184 /* 185 * default and boundary sizes for segkp 186 */ 187 #define SEGKPDEFSIZE (2L * 1024L * 1024L * 1024L) /* 2G */ 188 #define SEGKPMAXSIZE (8L * 1024L * 1024L * 1024L) /* 8G */ 189 #define SEGKPMINSIZE (200L * 1024 * 1024L) /* 200M */ 190 191 /* 192 * minimum size for segzio 193 */ 194 #define SEGZIOMINSIZE (400L * 1024 * 1024L) /* 400M */ 195 196 /* 197 * During intial boot we limit heap to the top 4Gig. 198 */ 199 #define BOOT_KERNELHEAP_BASE ADDRESS_C(0xffffffff00000000) 200 201 /* 202 * VMWare works best if we don't use the top 64Meg of memory for amd64. 203 * Set KERNEL_TEXT to top_o_memory - 64Meg - 8 Meg for 8Meg of nucleus pages. 204 */ 205 #define PROMSTART ADDRESS_C(0xffc00000) 206 #define KERNEL_TEXT KERNEL_TEXT_amd64 207 208 /* 209 * Virtual address range available to the debugger 210 */ 211 #define SEGDEBUGBASE ADDRESS_C(0xffffffffff800000) 212 #define SEGDEBUGSIZE ADDRESS_C(0x400000) 213 214 /* 215 * Define upper limit on user address space 216 * 217 * In amd64, the upper limit on a 64-bit user address space is 1 large page 218 * (2MB) below kernelbase. The upper limit for a 32-bit user address space 219 * is 1 small page (4KB) below the top of the 32-bit range. The 64-bit 220 * limit give dtrace the red zone it needs below kernelbase. The 32-bit 221 * limit gives us a small red zone to detect address-space overruns in a 222 * user program. 223 * 224 * On the hypervisor, we limit the user to memory below the VA hole. 225 * Subtract 1 large page for a red zone. 226 */ 227 #if defined(__xpv) 228 #define USERLIMIT ADDRESS_C(0x00007fffffe00000) 229 #else 230 #define USERLIMIT ADDRESS_C(0xfffffd7fffe00000) 231 #endif 232 233 #ifdef bug_5074717_is_fixed 234 #define USERLIMIT32 ADDRESS_C(0xfffff000) 235 #else 236 #define USERLIMIT32 ADDRESS_C(0xfefff000) 237 #endif 238 239 #elif defined(__i386) 240 241 #ifdef DEBUG 242 #define KERNELBASE ADDRESS_C(0xc8000000) 243 #else 244 #define KERNELBASE ADDRESS_C(0xd4000000) 245 #endif 246 247 #define KERNELBASE_MAX ADDRESS_C(0xe0000000) 248 249 /* 250 * The i386 ABI requires that the user address space be at least 3Gb 251 * in size. KERNELBASE_ABI_MIN is used as the default KERNELBASE for 252 * physical memory configurations > 4gb. 253 */ 254 #define KERNELBASE_ABI_MIN ADDRESS_C(0xc0000000) 255 256 /* 257 * Size of the unmapped "red zone" at the very bottom of the kernel's 258 * address space. Since segmap start immediately above the red zone, this 259 * needs to be MAXBSIZE aligned. 260 */ 261 #define KERNEL_REDZONE_SIZE MAXBSIZE 262 263 /* 264 * This is the last 4MB of the 4G address space. Some psm modules 265 * need this region of virtual address space mapped 1-1 266 * The top 64MB of the address space is reserved for the hypervisor. 267 */ 268 #define PROMSTART ADDRESS_C(0xffc00000) 269 #ifdef __xpv 270 #define KERNEL_TEXT KERNEL_TEXT_i386_xpv 271 #else 272 #define KERNEL_TEXT KERNEL_TEXT_i386 273 #endif 274 275 /* 276 * Virtual address range available to the debugger 277 * We place it just above the kernel text (4M) and kernel data (4M). 278 */ 279 #define SEGDEBUGBASE (KERNEL_TEXT + ADDRESS_C(0x800000)) 280 #define SEGDEBUGSIZE ADDRESS_C(0x400000) 281 282 /* 283 * Define upper limit on user address space 284 */ 285 #define USERLIMIT KERNELBASE 286 #define USERLIMIT32 USERLIMIT 287 288 #endif /* __i386 */ 289 290 /* 291 * Reserve pages just below KERNEL_TEXT for the GDT, IDT, TSS and debug info. 292 * 293 * For now, DEBUG_INFO_VA must be first in this list for "xm" initiated dumps 294 * of solaris domUs to be usable with mdb. Relying on a fixed VA is not viable 295 * long term, but it's the best we've got for now. 296 */ 297 #if !defined(_ASM) 298 #define DEBUG_INFO_VA (KERNEL_TEXT - MMU_PAGESIZE) 299 #define GDT_VA (DEBUG_INFO_VA - MMU_PAGESIZE) 300 #define IDT_VA (GDT_VA - MMU_PAGESIZE) 301 #define KTSS_VA (IDT_VA - MMU_PAGESIZE) 302 #define DFTSS_VA (KTSS_VA - MMU_PAGESIZE) 303 #define MISC_VA_BASE (DFTSS_VA) 304 #define MISC_VA_SIZE (KERNEL_TEXT - MISC_VA_BASE) 305 #endif /* !_ASM */ 306 307 #if !defined(_ASM) && !defined(_KMDB) 308 extern uintptr_t kernelbase, segmap_start, segmapsize; 309 #endif 310 311 /* 312 * ARGSBASE is the base virtual address of the range which 313 * the kernel uses to map the arguments for exec. 314 */ 315 #define ARGSBASE PROMSTART 316 317 /* 318 * reserve space for modules 319 */ 320 #define MODTEXT (1024 * 1024 * 2) 321 #define MODDATA (1024 * 300) 322 323 /* 324 * The heap has a region allocated from it of HEAPTEXT_SIZE bytes specifically 325 * for module text. 326 */ 327 #define HEAPTEXT_SIZE (64 * 1024 * 1024) /* bytes */ 328 329 /* 330 * Size of a kernel threads stack. It must be a whole number of pages 331 * since the segment it comes from will only allocate space in pages. 332 */ 333 #define T_STACKSZ 2*PAGESIZE 334 335 /* 336 * Size of a cpu startup thread stack. (It must be a whole number of pages 337 * since the containing segment only allocates space in pages.) 338 */ 339 340 #define STARTUP_STKSZ 3*PAGESIZE 341 342 /* 343 * Bus types 344 */ 345 #define BTISA 1 346 #define BTEISA 2 347 #define BTMCA 3 348 349 #ifdef __cplusplus 350 } 351 #endif 352 353 #endif /* _SYS_MACHPARAM_H */ 354