1/* 2 * Copyright (c) 2003-2006 Apple Computer, 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#ifdef PRIVATE 29 30#ifndef _PPC_CPU_CAPABILITIES_H 31#define _PPC_CPU_CAPABILITIES_H 32 33/* _cpu_capabilities 34 * 35 * This is the authoritative way to determine from user mode what 36 * implementation-specific processor features are available. 37 * This API is only supported for Apple internal use. 38 */ 39 40#ifndef __ASSEMBLER__ 41 42extern int _cpu_capabilities; 43 44#endif /* __ASSEMBLER__ */ 45 46/* Bit definitions for _cpu_capabilities: */ 47 48#define kHasAltivec 0x00000001 49#define k64Bit 0x00000002 // 64-bit GPRs 50#define kCache32 0x00000004 // cache line size is 32 bytes 51#define kCache64 0x00000008 52#define kCache128 0x00000010 53#define kDcbaRecommended 0x00000020 // PPC: dcba is available and recommended 54#define kDcbaAvailable 0x00000040 // PPC: dcba is available (but may or may not be recommended) 55#define kDataStreamsRecommended 0x00000080 // PPC: dst, dstt, dstst, dss, and dssall instructions available and recommended 56#define kDataStreamsAvailable 0x00000100 // PPC: dst, dstt, dstst, dss, and dssall instructions available (may or may not be rec'd) 57#define kDcbtStreamsRecommended 0x00000200 // PPC: enhanced dcbt instruction available and recommended 58#define kDcbtStreamsAvailable 0x00000400 // PPC: enhanced dcbt instruction available (but may or may not be recommended) 59#define kFastThreadLocalStorage 0x00000800 // TLS ptr is kept in a user-mode-readable register 60 61#define kUP 0x00008000 // set if (kNumCPUs == 1) 62#define kNumCPUs 0x00FF0000 // number of CPUs (see _NumCPUs() below) 63 64#define kNumCPUsShift 16 // see _NumCPUs() below 65 66#define kHasGraphicsOps 0x08000000 // PPC: has fres, frsqrte, and fsel instructions 67#define kHasStfiwx 0x10000000 // PPC: has stfiwx instruction 68#define kHasFsqrt 0x20000000 // PPC: has fsqrt and fsqrts instructions 69 70#ifndef __ASSEMBLER__ 71 72static __inline__ int _NumCPUs( void ) { return (_cpu_capabilities & kNumCPUs) >> kNumCPUsShift; } 73 74#endif /* __ASSEMBLER__ */ 75 76 77/* 78 * The shared kernel/user "comm page(s)": 79 * 80 * The last eight pages of every address space are reserved for the kernel/user 81 * "comm area". Because they can be addressed via a sign-extended 16-bit field, 82 * it is particularly efficient to access code or data in the comm area with 83 * absolute branches (ba, bla, bca) or absolute load/stores ("lwz r0,-4096(0)"). 84 * Because the comm area can be reached from anywhere, dyld is not needed. 85 * Although eight pages are reserved, presently only two are populated and mapped. 86 * 87 * Routines on the comm page(s) can be thought of as the firmware for extended processor 88 * instructions, whose opcodes are special forms of "bla". Ie, they are cpu 89 * capabilities. During system initialization, the kernel populates the comm page with 90 * code customized for the particular processor and platform. 91 * 92 * Because Mach VM cannot map the last page of an address space, the max length of 93 * the comm area is seven pages. 94 */ 95 96#define _COMM_PAGE_BASE_ADDRESS (-8*4096) // start at page -8, ie 0xFFFF8000 97#define _COMM_PAGE_AREA_LENGTH ( 7*4096) // reserved length of entire comm area 98#define _COMM_PAGE_AREA_USED ( 2*4096) // we use two pages so far 99 100/* The following set of definitions are used in the kernel, which needs to distinguish between 101 * the 32 and 64-bit commpage addresses and lengths. On PPC they are the same, but on Imtel 102 * they are not. 103 */ 104#define _COMM_PAGE32_BASE_ADDRESS ( _COMM_PAGE_BASE_ADDRESS ) 105#define _COMM_PAGE64_BASE_ADDRESS ( _COMM_PAGE_BASE_ADDRESS ) 106#define _COMM_PAGE32_AREA_LENGTH ( _COMM_PAGE_AREA_LENGTH ) 107#define _COMM_PAGE64_AREA_LENGTH ( _COMM_PAGE_AREA_LENGTH ) 108#define _COMM_PAGE32_AREA_USED ( _COMM_PAGE_AREA_USED ) 109#define _COMM_PAGE64_AREA_USED ( _COMM_PAGE_AREA_USED ) 110 111/* The Objective-C runtime fixed address page to optimize message dispatch */ 112#define _OBJC_PAGE_BASE_ADDRESS (-20*4096) // start at page -20, ie 0xFFFEC000 113 114/* 115 * Objective-C needs an "absolute" area all the way up to the top of the 116 * address space. 117 * For a ppc32 task, that area gets allocated at runtime from user space. 118 * For a ppc64 task, that area is not within the user-accessible address range, 119 * so we pre-allocate it at exec time (see vm_map_exec()) along with the 120 * comm page. 121 * 122 * NOTE: that means we can't "nest" the 64-bit comm page... 123 */ 124#define _COMM_PAGE32_OBJC_SIZE 0ULL 125#define _COMM_PAGE32_OBJC_BASE 0ULL 126#if 0 127#define _COMM_PAGE64_OBJC_SIZE (4 * 4096) 128#define _COMM_PAGE64_OBJC_BASE (_OBJC_PAGE_BASE_ADDRESS) 129#else 130/* 131 * PPC51: ppc64 is limited to 51-bit addresses. 132 * PPC64 has a 51-bit address space limit, so we can't just go and 133 * map the Obj-C area up there. We would have to create a nested pmap 134 * and make a special mapping that redirects the large virtual addresses to 135 * that other address space with lower addresses that fit within the 51-bit 136 * limit. 137 * VM would then have to handle this redirection when we fault one 138 * of these pages in but it doesn't do that at this point, so no 139 * Obj-C area for ppc64 for now :-( 140 */ 141#define _COMM_PAGE64_OBJC_SIZE 0ULL 142#define _COMM_PAGE64_OBJC_BASE 0ULL 143#endif 144 145/* data in the comm page */ 146 147#define _COMM_PAGE_SIGNATURE (_COMM_PAGE_BASE_ADDRESS+0x000) // first few bytes are a signature 148#define _COMM_PAGE_VERSION (_COMM_PAGE_BASE_ADDRESS+0x01E) // 16-bit version# 149#define _COMM_PAGE_THIS_VERSION 2 // this is version 2 of the commarea format 150 151#define _COMM_PAGE_CPU_CAPABILITIES (_COMM_PAGE_BASE_ADDRESS+0x020) // mirror of extern int _cpu_capabilities 152#define _COMM_PAGE_NCPUS (_COMM_PAGE_BASE_ADDRESS+0x021) // number of configured CPUs 153#define _COMM_PAGE_ALTIVEC (_COMM_PAGE_BASE_ADDRESS+0x024) // nonzero if Altivec available 154#define _COMM_PAGE_64_BIT (_COMM_PAGE_BASE_ADDRESS+0x025) // nonzero if 64-bit processor 155#define _COMM_PAGE_CACHE_LINESIZE (_COMM_PAGE_BASE_ADDRESS+0x026) // cache line size (16-bit field) 156 157#define _COMM_PAGE_UNUSED1 (_COMM_PAGE_BASE_ADDRESS+0x028) // 24 unused bytes 158 159#define _COMM_PAGE_2_TO_52 (_COMM_PAGE_BASE_ADDRESS+0x040) // double float constant 2**52 160#define _COMM_PAGE_10_TO_6 (_COMM_PAGE_BASE_ADDRESS+0x048) // double float constant 10**6 161#define _COMM_PAGE_MAGIC_FE (_COMM_PAGE_BASE_ADDRESS+0x050) // magic constant 0xFEFEFEFEFEFEFEFF (to find 0s) 162#define _COMM_PAGE_MAGIC_80 (_COMM_PAGE_BASE_ADDRESS+0x058) // magic constant 0x8080808080808080 (to find 0s) 163 164#define _COMM_PAGE_TIMEBASE (_COMM_PAGE_BASE_ADDRESS+0x060) // used by gettimeofday() 165#define _COMM_PAGE_TIMESTAMP (_COMM_PAGE_BASE_ADDRESS+0x068) // used by gettimeofday() 166#define _COMM_PAGE_SEC_PER_TICK (_COMM_PAGE_BASE_ADDRESS+0x070) // used by gettimeofday() 167 168 /* jump table (bla to this address, which may be a branch to the actual code somewhere else) */ 169 /* When new jump table entries are added, corresponding symbols should be added below */ 170 171#define _COMM_PAGE_COMPARE_AND_SWAP32 (_COMM_PAGE_BASE_ADDRESS+0x080) // compare-and-swap word, no barrier 172#define _COMM_PAGE_COMPARE_AND_SWAP64 (_COMM_PAGE_BASE_ADDRESS+0x0c0) // compare-and-swap doubleword, no barrier 173#define _COMM_PAGE_ENQUEUE (_COMM_PAGE_BASE_ADDRESS+0x100) // enqueue 174#define _COMM_PAGE_DEQUEUE (_COMM_PAGE_BASE_ADDRESS+0x140) // dequeue 175#define _COMM_PAGE_MEMORY_BARRIER (_COMM_PAGE_BASE_ADDRESS+0x180) // memory barrier 176#define _COMM_PAGE_ATOMIC_ADD32 (_COMM_PAGE_BASE_ADDRESS+0x1a0) // add atomic word 177#define _COMM_PAGE_ATOMIC_ADD64 (_COMM_PAGE_BASE_ADDRESS+0x1c0) // add atomic doubleword 178 179#define _COMM_PAGE_UNUSED3 (_COMM_PAGE_BASE_ADDRESS+0x1e0) // 32 unused bytes 180 181#define _COMM_PAGE_ABSOLUTE_TIME (_COMM_PAGE_BASE_ADDRESS+0x200) // mach_absolute_time() 182#define _COMM_PAGE_SPINLOCK_TRY (_COMM_PAGE_BASE_ADDRESS+0x220) // spinlock_try() 183#define _COMM_PAGE_SPINLOCK_LOCK (_COMM_PAGE_BASE_ADDRESS+0x260) // spinlock_lock() 184#define _COMM_PAGE_SPINLOCK_UNLOCK (_COMM_PAGE_BASE_ADDRESS+0x2a0) // spinlock_unlock() 185#define _COMM_PAGE_PTHREAD_GETSPECIFIC (_COMM_PAGE_BASE_ADDRESS+0x2c0) // pthread_getspecific() 186#define _COMM_PAGE_GETTIMEOFDAY (_COMM_PAGE_BASE_ADDRESS+0x2e0) // used by gettimeofday() 187#define _COMM_PAGE_FLUSH_DCACHE (_COMM_PAGE_BASE_ADDRESS+0x4e0) // sys_dcache_flush() 188#define _COMM_PAGE_FLUSH_ICACHE (_COMM_PAGE_BASE_ADDRESS+0x520) // sys_icache_invalidate() 189#define _COMM_PAGE_PTHREAD_SELF (_COMM_PAGE_BASE_ADDRESS+0x580) // pthread_self() 190 191#define _COMM_PAGE_UNUSED4 (_COMM_PAGE_BASE_ADDRESS+0x5a0) // 32 unused bytes 192 193#define _COMM_PAGE_RELINQUISH (_COMM_PAGE_BASE_ADDRESS+0x5c0) // used by spinlocks 194 195#define _COMM_PAGE_UNUSED5 (_COMM_PAGE_BASE_ADDRESS+0x5e0) // 32 unused bytes 196 197#define _COMM_PAGE_BZERO (_COMM_PAGE_BASE_ADDRESS+0x600) // bzero() 198#define _COMM_PAGE_BCOPY (_COMM_PAGE_BASE_ADDRESS+0x780) // bcopy() 199#define _COMM_PAGE_MEMCPY (_COMM_PAGE_BASE_ADDRESS+0x7a0) // memcpy() 200#define _COMM_PAGE_MEMMOVE (_COMM_PAGE_BASE_ADDRESS+0x7a0) // memmove() 201 202#define _COMM_PAGE_COMPARE_AND_SWAP32B (_COMM_PAGE_BASE_ADDRESS+0xf80) // compare-and-swap word w barrier 203#define _COMM_PAGE_COMPARE_AND_SWAP64B (_COMM_PAGE_BASE_ADDRESS+0xfc0) // compare-and-swap doubleword w barrier 204 205#define _COMM_PAGE_MEMSET_PATTERN (_COMM_PAGE_BASE_ADDRESS+0x1000)// used by nonzero memset() 206#define _COMM_PAGE_BIGCOPY (_COMM_PAGE_BASE_ADDRESS+0x1140)// very-long-operand copies 207 208#define _COMM_PAGE_END (_COMM_PAGE_BASE_ADDRESS+0x1700)// end of commpage area 209 210#ifdef __ASSEMBLER__ 211#ifdef __COMM_PAGE_SYMBOLS 212 213#define CREATE_COMM_PAGE_SYMBOL(symbol_name, symbol_address) \ 214 .org (symbol_address - _COMM_PAGE_BASE_ADDRESS) @\ 215symbol_name: nop 216 217 .text // Required to make a well behaved symbol file 218 219 CREATE_COMM_PAGE_SYMBOL(___compare_and_swap32, _COMM_PAGE_COMPARE_AND_SWAP32) 220 CREATE_COMM_PAGE_SYMBOL(___compare_and_swap64, _COMM_PAGE_COMPARE_AND_SWAP64) 221 CREATE_COMM_PAGE_SYMBOL(___atomic_enqueue, _COMM_PAGE_ENQUEUE) 222 CREATE_COMM_PAGE_SYMBOL(___atomic_dequeue, _COMM_PAGE_DEQUEUE) 223 CREATE_COMM_PAGE_SYMBOL(___memory_barrier, _COMM_PAGE_MEMORY_BARRIER) 224 CREATE_COMM_PAGE_SYMBOL(___atomic_add32, _COMM_PAGE_ATOMIC_ADD32) 225 CREATE_COMM_PAGE_SYMBOL(___atomic_add64, _COMM_PAGE_ATOMIC_ADD64) 226 CREATE_COMM_PAGE_SYMBOL(___mach_absolute_time, _COMM_PAGE_ABSOLUTE_TIME) 227 CREATE_COMM_PAGE_SYMBOL(___spin_lock_try, _COMM_PAGE_SPINLOCK_TRY) 228 CREATE_COMM_PAGE_SYMBOL(___spin_lock, _COMM_PAGE_SPINLOCK_LOCK) 229 CREATE_COMM_PAGE_SYMBOL(___spin_unlock, _COMM_PAGE_SPINLOCK_UNLOCK) 230 CREATE_COMM_PAGE_SYMBOL(___pthread_getspecific, _COMM_PAGE_PTHREAD_GETSPECIFIC) 231 CREATE_COMM_PAGE_SYMBOL(___gettimeofday, _COMM_PAGE_GETTIMEOFDAY) 232 CREATE_COMM_PAGE_SYMBOL(___sys_dcache_flush, _COMM_PAGE_FLUSH_DCACHE) 233 CREATE_COMM_PAGE_SYMBOL(___sys_icache_invalidate, _COMM_PAGE_FLUSH_ICACHE) 234 CREATE_COMM_PAGE_SYMBOL(___pthread_self, _COMM_PAGE_PTHREAD_SELF) 235 CREATE_COMM_PAGE_SYMBOL(___spin_lock_relinquish, _COMM_PAGE_RELINQUISH) 236 CREATE_COMM_PAGE_SYMBOL(___bzero, _COMM_PAGE_BZERO) 237 CREATE_COMM_PAGE_SYMBOL(___bcopy, _COMM_PAGE_BCOPY) 238 CREATE_COMM_PAGE_SYMBOL(___memcpy, _COMM_PAGE_MEMCPY) 239// CREATE_COMM_PAGE_SYMBOL(___memmove, _COMM_PAGE_MEMMOVE) 240 CREATE_COMM_PAGE_SYMBOL(___compare_and_swap32b, _COMM_PAGE_COMPARE_AND_SWAP32B) 241 CREATE_COMM_PAGE_SYMBOL(___compare_and_swap64b, _COMM_PAGE_COMPARE_AND_SWAP64B) 242 CREATE_COMM_PAGE_SYMBOL(___memset_pattern, _COMM_PAGE_MEMSET_PATTERN) 243 CREATE_COMM_PAGE_SYMBOL(___bigcopy, _COMM_PAGE_BIGCOPY) 244 245 CREATE_COMM_PAGE_SYMBOL(___end_comm_page, _COMM_PAGE_END) 246 247 .data // Required to make a well behaved symbol file 248 .long 0 // Required to make a well behaved symbol file 249 250#endif /* __COMM_PAGE_SYMBOLS */ 251#endif /* __ASSEMBLER__ */ 252 253#endif /* _PPC_CPU_CAPABILITIES_H */ 254#endif /* PRIVATE */ 255