158 lines
5.0 KiB
C
158 lines
5.0 KiB
C
/* $NetBSD: mips_param.h,v 1.37 2015/06/11 15:43:36 matt Exp $ */
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/*-
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* Copyright (c) 2013 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* No reason this can't be common
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*/
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#if defined(__MIPSEB__)
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# if defined(__mips_n32) || defined(__mips_n64)
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# define _MACHINE_ARCH mips64eb
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# define MACHINE_ARCH "mips64eb"
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# define _MACHINE32_ARCH mipseb
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# define MACHINE32_ARCH "mipseb"
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# else
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# define _MACHINE_ARCH mipseb
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# define MACHINE_ARCH "mipseb"
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# endif
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#elif defined(__MIPSEL__)
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# if defined(__mips_n32) || defined(__mips_n64)
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# define _MACHINE_ARCH mips64el
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# define MACHINE_ARCH "mips64el"
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# define _MACHINE32_ARCH mipsel
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# define MACHINE32_ARCH "mipsel"
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# else
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# define _MACHINE_ARCH mipsel
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# define MACHINE_ARCH "mipsel"
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#endif
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#else
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#error neither __MIPSEL__ nor __MIPSEB__ are defined.
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#endif
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/*
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* Userland code should be using uname/sysctl to get MACHINE so simply
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* export a generic MACHINE of "mips"
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*/
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#ifndef _KERNEL
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#undef MACHINE
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#define MACHINE "mips"
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#endif
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#define ALIGNBYTES32 (sizeof(double) - 1)
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#define ALIGN32(p) (((uintptr_t)(p) + ALIGNBYTES32) &~ALIGNBYTES32)
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/*
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* On mips, UPAGES is fixed by sys/arch/mips/mips/locore code
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* to be the number of per-process-wired kernel-stack pages/PTES.
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*/
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#define SSIZE 1 /* initial stack size/NBPG */
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#define SINCR 1 /* increment of stack/NBPG */
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#ifdef ENABLE_MIPS_16KB_PAGE
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#define UPAGES 1 /* pages of u-area */
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#define USPACE (UPAGES*NBPG) /* size of u-area in bytes */
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#elif defined(ENABLE_MIPS_4KB_PAGE) || 1
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#define UPAGES 2 /* pages of u-area */
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#define USPACE (UPAGES*NBPG) /* size of u-area in bytes */
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#else
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#error ENABLE_MIPS_xKB_PAGE not defined
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#endif
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#define USPACE_ALIGN USPACE /* make sure it starts on a even VA */
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#ifndef MSGBUFSIZE
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#define MSGBUFSIZE NBPG /* default message buffer size */
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#endif
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#ifndef COHERENCY_UNIT
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#define COHERENCY_UNIT 32 /* MIPS cachelines are usually 32 bytes */
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#endif
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#ifdef ENABLE_MIPS_16KB_PAGE
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#define NBPG 16384 /* bytes/page */
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#define PGSHIFT 14 /* LOG2(NBPG) */
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#else
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#define NBPG 4096 /* bytes/page */
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#define PGSHIFT 12 /* LOG2(NBPG) */
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#endif
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#define PGOFSET (NBPG-1) /* byte offset into page */
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#define NPTEPG (NBPG/4)
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#define NBSEG (NBPG*NPTEPG) /* bytes/segment */
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#define SEGOFSET (NBSEG-1) /* byte offset into segment */
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#define SEGSHIFT (PGSHIFT+(PGSHIFT-2)) /* LOG2(NBSEG) */
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#ifdef _LP64
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#define NSEGPG (NBPG/8)
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#define NBXSEG ((uint64_t)NSEGPG*NBSEG) /* bytes/xsegment */
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#define XSEGOFSET (NBSEG-1) /* byte offset into segment */
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#define XSEGSHIFT (SEGSHIFT+(PGSHIFT-3)) /* LOG2(NBXSEG) */
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#endif
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/*
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* Minimum and maximum sizes of the kernel malloc arena in PAGE_SIZE-sized
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* logical pages.
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*/
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#define NKMEMPAGES_MIN_DEFAULT ((8 * 1024 * 1024) >> PAGE_SHIFT)
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#define NKMEMPAGES_MAX_DEFAULT ((128 * 1024 * 1024) >> PAGE_SHIFT)
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/*
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* Mach derived conversion macros
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*/
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#define mips_round_page(x) ((((uintptr_t)(x)) + NBPG - 1) & ~(NBPG-1))
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#define mips_trunc_page(x) ((uintptr_t)(x) & ~(NBPG-1))
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#define mips_btop(x) ((paddr_t)(x) >> PGSHIFT)
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#define mips_ptob(x) ((paddr_t)(x) << PGSHIFT)
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#ifdef __MIPSEL__
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#define MID_MACHINE MID_PMAX /* MID_PMAX (little-endian) */
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#endif
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#ifdef __MIPSEB__
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#define MID_MACHINE MID_MIPS /* MID_MIPS (big-endian) */
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#endif
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/*
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* Constants related to network buffer management.
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* MCLBYTES must be no larger than NBPG (the software page size), and,
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* on machines that exchange pages of input or output buffers with mbuf
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* clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple
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* of the hardware page size.
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*/
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#ifndef MSIZE
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#ifdef _LP64
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#define MSIZE 512 /* size of an mbuf */
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#else
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#define MSIZE 256 /* size of an mbuf */
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#endif
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#ifndef MCLSHIFT
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# define MCLSHIFT 11 /* convert bytes to m_buf clusters */
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#endif /* MCLSHIFT */
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#define MCLBYTES (1 << MCLSHIFT) /* size of a m_buf cluster */
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#endif
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