cpu_capabilities.h   [plain text]

/*
 * Copyright (c) 2003-2005 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_LICENSE_HEADER_START@
 * 
 * The contents of this file constitute Original Code as defined in and
 * are subject to the Apple Public Source License Version 1.1 (the
 * "License").  You may not use this file except in compliance with the
 * License.  Please obtain a copy of the License at
 * http://www.apple.com/publicsource and read it before using this file.
 * 
 * This 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 OR NON-INFRINGEMENT.  Please see the
 * License for the specific language governing rights and limitations
 * under the License.
 * 
 * @APPLE_LICENSE_HEADER_END@
 */
#ifdef	PRIVATE

#ifndef _I386_CPU_CAPABILITIES_H
#define _I386_CPU_CAPABILITIES_H

#ifndef	__ASSEMBLER__
#include <stdint.h>
#endif
 
/*
 * This is the authoritative way to determine from user mode what
 * implementation-specific processor features are available.
 * This API only supported for Apple internal use.
 * 
 */

/* Bit definitions for _cpu_capabilities: */

#define	kHasMMX				0x00000001
#define	kHasSSE				0x00000002
#define	kHasSSE2			0x00000004
#define	kHasSSE3			0x00000008
#define	kCache32			0x00000010	// cache line size is 32 bytes
#define	kCache64			0x00000020
#define	kCache128			0x00000040
#define	kFastThreadLocalStorage		0x00000080	// 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

#ifndef	__ASSEMBLER__
#include <sys/cdefs.h>

__BEGIN_DECLS
extern int  _get_cpu_capabilities( void );
__END_DECLS

inline static
int _NumCPUs( void )
{
	return (_get_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". 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_AREA_LENGTH	(19*4096)
					// reserved length of entire comm area
#define _COMM_PAGE_BASE_ADDRESS (-20*4096)
					// VM_MAX_ADDRESS-_COMM_PAGE_AREA_LENGTH
#define _COMM_PAGE_START_ADDRESS (-16*4096)
					// VM_MAX_ADDRESS-_COMM_PAGE_AREA_LENGTH
#define _COMM_PAGE_SIGS_OFFSET	0x8000
					// offset to routine signatures
 
/* data in the comm page */
 
#define _COMM_PAGE_SIGNATURE			(_COMM_PAGE_START_ADDRESS+0x000)	// first few bytes are a signature
#define _COMM_PAGE_VERSION				(_COMM_PAGE_START_ADDRESS+0x01E)	// 16-bit version#
#define	_COMM_PAGE_THIS_VERSION			3								// version of the commarea format
  
#define _COMM_PAGE_CPU_CAPABILITIES		(_COMM_PAGE_START_ADDRESS+0x020)	// uint32_t _cpu_capabilities
#define _COMM_PAGE_NCPUS				(_COMM_PAGE_START_ADDRESS+0x021)	// uint8_t number of configured CPUs
#define _COMM_PAGE_VECTOR_FLAVOR		(_COMM_PAGE_START_ADDRESS+0x024)	// uint8_t SSE/SSE2/SSE3 
#define _COMM_PAGE_CACHE_LINESIZE		(_COMM_PAGE_START_ADDRESS+0x026)	// uint16_t cache line size
 
#define _COMM_PAGE_UNUSED1				(_COMM_PAGE_START_ADDRESS+0x030)	// 16 unused bytes
 
#define _COMM_PAGE_2_TO_52				(_COMM_PAGE_START_ADDRESS+0x040)	// double float constant 2**52
#define _COMM_PAGE_10_TO_6				(_COMM_PAGE_START_ADDRESS+0x048)	// double float constant 10**6
 
#define _COMM_PAGE_UNUSED2				(_COMM_PAGE_START_ADDRESS+0x050)	// 16 unused bytes
 
#define _COMM_PAGE_TIMEBASE				(_COMM_PAGE_START_ADDRESS+0x060)	// used by gettimeofday()
#define _COMM_PAGE_TIMESTAMP			(_COMM_PAGE_START_ADDRESS+0x068)	// used by gettimeofday()
#define _COMM_PAGE_SEC_PER_TICK			(_COMM_PAGE_START_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_START_ADDRESS+0x080) // compare-and-swap word
#define _COMM_PAGE_COMPARE_AND_SWAP64   (_COMM_PAGE_START_ADDRESS+0x0c0) // compare-and-swap doubleword
#define _COMM_PAGE_ENQUEUE              (_COMM_PAGE_START_ADDRESS+0x100) // enqueue
#define _COMM_PAGE_DEQUEUE              (_COMM_PAGE_START_ADDRESS+0x140) // dequeue
#define _COMM_PAGE_MEMORY_BARRIER       (_COMM_PAGE_START_ADDRESS+0x180) // add atomic doubleword
#define _COMM_PAGE_ATOMIC_ADD32         (_COMM_PAGE_START_ADDRESS+0x1a0) // add atomic word
#define _COMM_PAGE_ATOMIC_ADD64         (_COMM_PAGE_START_ADDRESS+0x1c0) // add atomic doubleword

#define _COMM_PAGE_NANOTIME_INFO        (_COMM_PAGE_START_ADDRESS+0x1e0) // 32 bytes used by nanotime()
 
#define _COMM_PAGE_ABSOLUTE_TIME		(_COMM_PAGE_START_ADDRESS+0x200)	// mach_absolute_time()
#define _COMM_PAGE_SPINLOCK_TRY			(_COMM_PAGE_START_ADDRESS+0x220)	// spinlock_try()
#define _COMM_PAGE_SPINLOCK_LOCK		(_COMM_PAGE_START_ADDRESS+0x260)	// spinlock_lock()
#define _COMM_PAGE_SPINLOCK_UNLOCK		(_COMM_PAGE_START_ADDRESS+0x2a0)	// spinlock_unlock()
#define _COMM_PAGE_PTHREAD_GETSPECIFIC  (_COMM_PAGE_START_ADDRESS+0x2c0)	// pthread_getspecific()
#define _COMM_PAGE_GETTIMEOFDAY			(_COMM_PAGE_START_ADDRESS+0x2e0)	// used by gettimeofday()
#define _COMM_PAGE_FLUSH_DCACHE			(_COMM_PAGE_START_ADDRESS+0x4e0)	// sys_dcache_flush()
#define _COMM_PAGE_FLUSH_ICACHE			(_COMM_PAGE_START_ADDRESS+0x520)	// sys_icache_invalidate()
#define _COMM_PAGE_PTHREAD_SELF			(_COMM_PAGE_START_ADDRESS+0x580)	// pthread_self()
#define _COMM_PAGE_UNUSED4				(_COMM_PAGE_START_ADDRESS+0x5a0)	// 32 unused bytes
#define _COMM_PAGE_RELINQUISH			(_COMM_PAGE_START_ADDRESS+0x5c0) // used by spinlocks
 
#define _COMM_PAGE_BTS		        	(_COMM_PAGE_START_ADDRESS+0x5e0) // bit test-and-set 
#define _COMM_PAGE_BTC					(_COMM_PAGE_START_ADDRESS+0x5f0) // bit test-and-clear 
 
#define _COMM_PAGE_BZERO				(_COMM_PAGE_START_ADDRESS+0x600)	// bzero()
#define _COMM_PAGE_BCOPY				(_COMM_PAGE_START_ADDRESS+0x780)	// bcopy()
#define	_COMM_PAGE_MEMCPY				(_COMM_PAGE_START_ADDRESS+0x7a0)	// memcpy()
#define	_COMM_PAGE_MEMMOVE				(_COMM_PAGE_START_ADDRESS+0x7a0)	// memmove()

#define	_COMM_PAGE_NANOTIME				(_COMM_PAGE_START_ADDRESS+0xF80) // nanotime()

#define	_COMM_PAGE_BIGCOPY				(_COMM_PAGE_START_ADDRESS+0x1000)// very-long-operand copies

#define _COMM_PAGE_END					(_COMM_PAGE_START_ADDRESS+0x1600)// end of common page

#ifdef __ASSEMBLER__
#ifdef __COMM_PAGE_SYMBOLS

#define CREATE_COMM_PAGE_SYMBOL(symbol_name, symbol_address)		\
				.org	(symbol_address - (_COMM_PAGE_BASE_ADDRESS & 0xFFFFE000)) ;\
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(___bit_test_and_set, _COMM_PAGE_BTS)
	CREATE_COMM_PAGE_SYMBOL(___bit_test_and_clear, _COMM_PAGE_BTC)
	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(___bigcopy, _COMM_PAGE_BIGCOPY)
	CREATE_COMM_PAGE_SYMBOL(___nanotime, _COMM_PAGE_NANOTIME)
	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 /* _I386_CPU_CAPABILITIES_H */
#endif /* PRIVATE */