/* * Copyright (c) 2003-2007 Apple 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@ */ #ifndef _I386_COMMPAGE_H #define _I386_COMMPAGE_H #ifndef __ASSEMBLER__ #include <stdint.h> #endif /* __ASSEMBLER__ */ /* The following macro is used to generate the 64-bit commpage address for a given * routine, based on its 32-bit address. This is used in the kernel to compile * the 64-bit commpage. Since the kernel is a 32-bit object, cpu_capabilities.h * only defines the 32-bit address. */ #define _COMM_PAGE_32_TO_64( ADDRESS ) ( ADDRESS + _COMM_PAGE64_START_ADDRESS - _COMM_PAGE32_START_ADDRESS ) #ifdef __ASSEMBLER__ #define COMMPAGE_DESCRIPTOR(label,address,must,cant) \ L ## label ## _end: ;\ .const_data ;\ L ## label ## _size = L ## label ## _end - L ## label ;\ .private_extern _commpage_ ## label ;\ _commpage_ ## label ## : ;\ .long L ## label ;\ .long L ## label ## _size ;\ .long address ;\ .long must ;\ .long cant ;\ .text #else /* __ASSEMBLER__ */ /* Each potential commpage routine is described by one of these. * Note that the COMMPAGE_DESCRIPTOR macro (above), used in * assembly language, must agree with this. */ typedef struct commpage_descriptor { void *code_address; // address of code long code_length; // length in bytes long commpage_address; // put at this address (_COMM_PAGE_BCOPY etc) long musthave; // _cpu_capability bits we must have long canthave; // _cpu_capability bits we can't have } commpage_descriptor; /* Warning: following structure must match the layout of the commpage. */ /* This is the data starting at _COMM_PAGE_TIME_DATA_START, ie for nanotime() and gettimeofday() */ typedef volatile struct commpage_time_data { uint64_t nt_tsc_base; // _COMM_PAGE_NT_TSC_BASE uint32_t nt_scale; // _COMM_PAGE_NT_SCALE uint32_t nt_shift; // _COMM_PAGE_NT_SHIFT uint64_t nt_ns_base; // _COMM_PAGE_NT_NS_BASE uint32_t nt_generation; // _COMM_PAGE_NT_GENERATION uint32_t gtod_generation; // _COMM_PAGE_GTOD_GENERATION uint64_t gtod_ns_base; // _COMM_PAGE_GTOD_NS_BASE uint64_t gtod_sec_base; // _COMM_PAGE_GTOD_SEC_BASE } commpage_time_data; extern char *commPagePtr32; // virt address of 32-bit commpage in kernel map extern char *commPagePtr64; // ...and of 64-bit commpage extern void commpage_set_timestamp(uint64_t abstime, uint64_t secs); extern void commpage_disable_timestamp( void ); extern void commpage_set_nanotime(uint64_t tsc_base, uint64_t ns_base, uint32_t scale, uint32_t shift); extern void commpage_sched_gen_inc(void); #endif /* __ASSEMBLER__ */ #endif /* _I386_COMMPAGE_H */