/* * Copyright (c) 2003-2006 Apple Computer, Inc. All rights reserved. * * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ * * This file contains Original Code and/or Modifications of Original Code * as defined in and that are subject to the Apple Public Source License * Version 2.0 (the 'License'). You may not use this file except in * compliance with the License. The rights granted to you under the License * may not be used to create, or enable the creation or redistribution of, * unlawful or unlicensed copies of an Apple operating system, or to * circumvent, violate, or enable the circumvention or violation of, any * terms of an Apple operating system software license agreement. * * Please obtain a copy of the License at * http://www.opensource.apple.com/apsl/ and read it before using this file. * * The Original Code and all software distributed under the License are * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. * Please see the License for the specific language governing rights and * limitations under the License. * * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ */ #ifdef PRIVATE #ifndef _PPC_CPU_CAPABILITIES_H #define _PPC_CPU_CAPABILITIES_H /* _cpu_capabilities * * This is the authoritative way to determine from user mode what * implementation-specific processor features are available. * This API is only supported for Apple internal use. */ #ifndef __ASSEMBLER__ extern int _cpu_capabilities; #endif /* __ASSEMBLER__ */ /* Bit definitions for _cpu_capabilities: */ #define kHasAltivec 0x00000001 #define k64Bit 0x00000002 // 64-bit GPRs #define kCache32 0x00000004 // cache line size is 32 bytes #define kCache64 0x00000008 #define kCache128 0x00000010 #define kDcbaRecommended 0x00000020 // PPC: dcba is available and recommended #define kDcbaAvailable 0x00000040 // PPC: dcba is available (but may or may not be recommended) #define kDataStreamsRecommended 0x00000080 // PPC: dst, dstt, dstst, dss, and dssall instructions available and recommended #define kDataStreamsAvailable 0x00000100 // PPC: dst, dstt, dstst, dss, and dssall instructions available (may or may not be rec'd) #define kDcbtStreamsRecommended 0x00000200 // PPC: enhanced dcbt instruction available and recommended #define kDcbtStreamsAvailable 0x00000400 // PPC: enhanced dcbt instruction available (but may or may not be recommended) #define kFastThreadLocalStorage 0x00000800 // TLS ptr is kept in a user-mode-readable register #define kUP 0x00008000 // set if (kNumCPUs == 1) #define kNumCPUs 0x00FF0000 // number of CPUs (see _NumCPUs() below) #define kNumCPUsShift 16 // see _NumCPUs() below #define kHasGraphicsOps 0x08000000 // PPC: has fres, frsqrte, and fsel instructions #define kHasStfiwx 0x10000000 // PPC: has stfiwx instruction #define kHasFsqrt 0x20000000 // PPC: has fsqrt and fsqrts instructions #ifndef __ASSEMBLER__ static __inline__ int _NumCPUs( void ) { return (_cpu_capabilities & kNumCPUs) >> kNumCPUsShift; } #endif /* __ASSEMBLER__ */ /* * The shared kernel/user "comm page(s)": * * The last eight pages of every address space are reserved for the kernel/user * "comm area". Because they can be addressed via a sign-extended 16-bit field, * it is particularly efficient to access code or data in the comm area with * absolute branches (ba, bla, bca) or absolute load/stores ("lwz r0,-4096(0)"). * Because the comm area can be reached from anywhere, dyld is not needed. * Although eight pages are reserved, presently only two are populated and mapped. * * Routines on the comm page(s) can be thought of as the firmware for extended processor * instructions, whose opcodes are special forms of "bla". Ie, they are cpu * capabilities. During system initialization, the kernel populates the comm page with * code customized for the particular processor and platform. * * Because Mach VM cannot map the last page of an address space, the max length of * the comm area is seven pages. */ #define _COMM_PAGE_BASE_ADDRESS (-8*4096) // start at page -8, ie 0xFFFF8000 #define _COMM_PAGE_AREA_LENGTH ( 7*4096) // reserved length of entire comm area #define _COMM_PAGE_AREA_USED ( 2*4096) // we use two pages so far /* The following set of definitions are used in the kernel, which needs to distinguish between * the 32 and 64-bit commpage addresses and lengths. On PPC they are the same, but on Imtel * they are not. */ #define _COMM_PAGE32_BASE_ADDRESS ( _COMM_PAGE_BASE_ADDRESS ) #define _COMM_PAGE64_BASE_ADDRESS ( _COMM_PAGE_BASE_ADDRESS ) #define _COMM_PAGE32_AREA_LENGTH ( _COMM_PAGE_AREA_LENGTH ) #define _COMM_PAGE64_AREA_LENGTH ( _COMM_PAGE_AREA_LENGTH ) #define _COMM_PAGE32_AREA_USED ( _COMM_PAGE_AREA_USED ) #define _COMM_PAGE64_AREA_USED ( _COMM_PAGE_AREA_USED ) /* The Objective-C runtime fixed address page to optimize message dispatch */ #define _OBJC_PAGE_BASE_ADDRESS (-20*4096) // start at page -20, ie 0xFFFEC000 /* * Objective-C needs an "absolute" area all the way up to the top of the * address space. * For a ppc32 task, that area gets allocated at runtime from user space. * For a ppc64 task, that area is not within the user-accessible address range, * so we pre-allocate it at exec time (see vm_map_exec()) along with the * comm page. * * NOTE: that means we can't "nest" the 64-bit comm page... */ #define _COMM_PAGE32_OBJC_SIZE 0ULL #define _COMM_PAGE32_OBJC_BASE 0ULL #if 0 #define _COMM_PAGE64_OBJC_SIZE (4 * 4096) #define _COMM_PAGE64_OBJC_BASE (_OBJC_PAGE_BASE_ADDRESS) #else /* * PPC51: ppc64 is limited to 51-bit addresses. * PPC64 has a 51-bit address space limit, so we can't just go and * map the Obj-C area up there. We would have to create a nested pmap * and make a special mapping that redirects the large virtual addresses to * that other address space with lower addresses that fit within the 51-bit * limit. * VM would then have to handle this redirection when we fault one * of these pages in but it doesn't do that at this point, so no * Obj-C area for ppc64 for now :-( */ #define _COMM_PAGE64_OBJC_SIZE 0ULL #define _COMM_PAGE64_OBJC_BASE 0ULL #endif /* data in the comm page */ #define _COMM_PAGE_SIGNATURE (_COMM_PAGE_BASE_ADDRESS+0x000) // first few bytes are a signature #define _COMM_PAGE_VERSION (_COMM_PAGE_BASE_ADDRESS+0x01E) // 16-bit version# #define _COMM_PAGE_THIS_VERSION 2 // this is version 2 of the commarea format #define _COMM_PAGE_CPU_CAPABILITIES (_COMM_PAGE_BASE_ADDRESS+0x020) // mirror of extern int _cpu_capabilities #define _COMM_PAGE_NCPUS (_COMM_PAGE_BASE_ADDRESS+0x021) // number of configured CPUs #define _COMM_PAGE_ALTIVEC (_COMM_PAGE_BASE_ADDRESS+0x024) // nonzero if Altivec available #define _COMM_PAGE_64_BIT (_COMM_PAGE_BASE_ADDRESS+0x025) // nonzero if 64-bit processor #define _COMM_PAGE_CACHE_LINESIZE (_COMM_PAGE_BASE_ADDRESS+0x026) // cache line size (16-bit field) #define _COMM_PAGE_UNUSED1 (_COMM_PAGE_BASE_ADDRESS+0x028) // 24 unused bytes #define _COMM_PAGE_2_TO_52 (_COMM_PAGE_BASE_ADDRESS+0x040) // double float constant 2**52 #define _COMM_PAGE_10_TO_6 (_COMM_PAGE_BASE_ADDRESS+0x048) // double float constant 10**6 #define _COMM_PAGE_MAGIC_FE (_COMM_PAGE_BASE_ADDRESS+0x050) // magic constant 0xFEFEFEFEFEFEFEFF (to find 0s) #define _COMM_PAGE_MAGIC_80 (_COMM_PAGE_BASE_ADDRESS+0x058) // magic constant 0x8080808080808080 (to find 0s) #define _COMM_PAGE_TIMEBASE (_COMM_PAGE_BASE_ADDRESS+0x060) // used by gettimeofday() #define _COMM_PAGE_TIMESTAMP (_COMM_PAGE_BASE_ADDRESS+0x068) // used by gettimeofday() #define _COMM_PAGE_SEC_PER_TICK (_COMM_PAGE_BASE_ADDRESS+0x070) // used by gettimeofday() /* jump table (bla to this address, which may be a branch to the actual code somewhere else) */ /* When new jump table entries are added, corresponding symbols should be added below */ #define _COMM_PAGE_COMPARE_AND_SWAP32 (_COMM_PAGE_BASE_ADDRESS+0x080) // compare-and-swap word, no barrier #define _COMM_PAGE_COMPARE_AND_SWAP64 (_COMM_PAGE_BASE_ADDRESS+0x0c0) // compare-and-swap doubleword, no barrier #define _COMM_PAGE_ENQUEUE (_COMM_PAGE_BASE_ADDRESS+0x100) // enqueue #define _COMM_PAGE_DEQUEUE (_COMM_PAGE_BASE_ADDRESS+0x140) // dequeue #define _COMM_PAGE_MEMORY_BARRIER (_COMM_PAGE_BASE_ADDRESS+0x180) // memory barrier #define _COMM_PAGE_ATOMIC_ADD32 (_COMM_PAGE_BASE_ADDRESS+0x1a0) // add atomic word #define _COMM_PAGE_ATOMIC_ADD64 (_COMM_PAGE_BASE_ADDRESS+0x1c0) // add atomic doubleword #define _COMM_PAGE_UNUSED3 (_COMM_PAGE_BASE_ADDRESS+0x1e0) // 32 unused bytes #define _COMM_PAGE_ABSOLUTE_TIME (_COMM_PAGE_BASE_ADDRESS+0x200) // mach_absolute_time() #define _COMM_PAGE_SPINLOCK_TRY (_COMM_PAGE_BASE_ADDRESS+0x220) // spinlock_try() #define _COMM_PAGE_SPINLOCK_LOCK (_COMM_PAGE_BASE_ADDRESS+0x260) // spinlock_lock() #define _COMM_PAGE_SPINLOCK_UNLOCK (_COMM_PAGE_BASE_ADDRESS+0x2a0) // spinlock_unlock() #define _COMM_PAGE_PTHREAD_GETSPECIFIC (_COMM_PAGE_BASE_ADDRESS+0x2c0) // pthread_getspecific() #define _COMM_PAGE_GETTIMEOFDAY (_COMM_PAGE_BASE_ADDRESS+0x2e0) // used by gettimeofday() #define _COMM_PAGE_FLUSH_DCACHE (_COMM_PAGE_BASE_ADDRESS+0x4e0) // sys_dcache_flush() #define _COMM_PAGE_FLUSH_ICACHE (_COMM_PAGE_BASE_ADDRESS+0x520) // sys_icache_invalidate() #define _COMM_PAGE_PTHREAD_SELF (_COMM_PAGE_BASE_ADDRESS+0x580) // pthread_self() #define _COMM_PAGE_UNUSED4 (_COMM_PAGE_BASE_ADDRESS+0x5a0) // 32 unused bytes #define _COMM_PAGE_RELINQUISH (_COMM_PAGE_BASE_ADDRESS+0x5c0) // used by spinlocks #define _COMM_PAGE_UNUSED5 (_COMM_PAGE_BASE_ADDRESS+0x5e0) // 32 unused bytes #define _COMM_PAGE_BZERO (_COMM_PAGE_BASE_ADDRESS+0x600) // bzero() #define _COMM_PAGE_BCOPY (_COMM_PAGE_BASE_ADDRESS+0x780) // bcopy() #define _COMM_PAGE_MEMCPY (_COMM_PAGE_BASE_ADDRESS+0x7a0) // memcpy() #define _COMM_PAGE_MEMMOVE (_COMM_PAGE_BASE_ADDRESS+0x7a0) // memmove() #define _COMM_PAGE_COMPARE_AND_SWAP32B (_COMM_PAGE_BASE_ADDRESS+0xf80) // compare-and-swap word w barrier #define _COMM_PAGE_COMPARE_AND_SWAP64B (_COMM_PAGE_BASE_ADDRESS+0xfc0) // compare-and-swap doubleword w barrier #define _COMM_PAGE_MEMSET_PATTERN (_COMM_PAGE_BASE_ADDRESS+0x1000)// used by nonzero memset() #define _COMM_PAGE_BIGCOPY (_COMM_PAGE_BASE_ADDRESS+0x1140)// very-long-operand copies #define _COMM_PAGE_END (_COMM_PAGE_BASE_ADDRESS+0x1700)// end of commpage area #ifdef __ASSEMBLER__ #ifdef __COMM_PAGE_SYMBOLS #define CREATE_COMM_PAGE_SYMBOL(symbol_name, symbol_address) \ .org (symbol_address - _COMM_PAGE_BASE_ADDRESS) @\ symbol_name: nop .text // Required to make a well behaved symbol file CREATE_COMM_PAGE_SYMBOL(___compare_and_swap32, _COMM_PAGE_COMPARE_AND_SWAP32) CREATE_COMM_PAGE_SYMBOL(___compare_and_swap64, _COMM_PAGE_COMPARE_AND_SWAP64) CREATE_COMM_PAGE_SYMBOL(___atomic_enqueue, _COMM_PAGE_ENQUEUE) CREATE_COMM_PAGE_SYMBOL(___atomic_dequeue, _COMM_PAGE_DEQUEUE) CREATE_COMM_PAGE_SYMBOL(___memory_barrier, _COMM_PAGE_MEMORY_BARRIER) CREATE_COMM_PAGE_SYMBOL(___atomic_add32, _COMM_PAGE_ATOMIC_ADD32) CREATE_COMM_PAGE_SYMBOL(___atomic_add64, _COMM_PAGE_ATOMIC_ADD64) CREATE_COMM_PAGE_SYMBOL(___mach_absolute_time, _COMM_PAGE_ABSOLUTE_TIME) CREATE_COMM_PAGE_SYMBOL(___spin_lock_try, _COMM_PAGE_SPINLOCK_TRY) CREATE_COMM_PAGE_SYMBOL(___spin_lock, _COMM_PAGE_SPINLOCK_LOCK) CREATE_COMM_PAGE_SYMBOL(___spin_unlock, _COMM_PAGE_SPINLOCK_UNLOCK) CREATE_COMM_PAGE_SYMBOL(___pthread_getspecific, _COMM_PAGE_PTHREAD_GETSPECIFIC) CREATE_COMM_PAGE_SYMBOL(___gettimeofday, _COMM_PAGE_GETTIMEOFDAY) CREATE_COMM_PAGE_SYMBOL(___sys_dcache_flush, _COMM_PAGE_FLUSH_DCACHE) CREATE_COMM_PAGE_SYMBOL(___sys_icache_invalidate, _COMM_PAGE_FLUSH_ICACHE) CREATE_COMM_PAGE_SYMBOL(___pthread_self, _COMM_PAGE_PTHREAD_SELF) CREATE_COMM_PAGE_SYMBOL(___spin_lock_relinquish, _COMM_PAGE_RELINQUISH) CREATE_COMM_PAGE_SYMBOL(___bzero, _COMM_PAGE_BZERO) CREATE_COMM_PAGE_SYMBOL(___bcopy, _COMM_PAGE_BCOPY) CREATE_COMM_PAGE_SYMBOL(___memcpy, _COMM_PAGE_MEMCPY) // CREATE_COMM_PAGE_SYMBOL(___memmove, _COMM_PAGE_MEMMOVE) CREATE_COMM_PAGE_SYMBOL(___compare_and_swap32b, _COMM_PAGE_COMPARE_AND_SWAP32B) CREATE_COMM_PAGE_SYMBOL(___compare_and_swap64b, _COMM_PAGE_COMPARE_AND_SWAP64B) CREATE_COMM_PAGE_SYMBOL(___memset_pattern, _COMM_PAGE_MEMSET_PATTERN) CREATE_COMM_PAGE_SYMBOL(___bigcopy, _COMM_PAGE_BIGCOPY) CREATE_COMM_PAGE_SYMBOL(___end_comm_page, _COMM_PAGE_END) .data // Required to make a well behaved symbol file .long 0 // Required to make a well behaved symbol file #endif /* __COMM_PAGE_SYMBOLS */ #endif /* __ASSEMBLER__ */ #endif /* _PPC_CPU_CAPABILITIES_H */ #endif /* PRIVATE */