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param.h revision 1.4 
      1 /* $NetBSD: param.h,v 1.4 2021/05/01 07:06:54 skrll Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 2014 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Matt Thomas of 3am Software Foundry.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #ifndef	_RISCV_PARAM_H_
     33 #define	_RISCV_PARAM_H_
     34 
     35 /*
     36  * Machine dependent constants for all OpenRISC processors
     37  */
     38 
     39 /*
     40  * For KERNEL code:
     41  *	MACHINE must be defined by the individual port.  This is so that
     42  *	uname returns the correct thing, etc.
     43  *
     44  * For non-KERNEL code:
     45  *	If ELF, MACHINE and MACHINE_ARCH are forced to "or1k/or1k".
     46  */
     47 
     48 #ifdef _LP64
     49 #define	_MACHINE_ARCH	riscv64
     50 #define	MACHINE_ARCH	"riscv64"
     51 #define	_MACHINE_ARCH32	riscv32
     52 #define	MACHINE_ARCH32	"riscv32"
     53 #else
     54 #define	_MACHINE_ARCH	riscv32
     55 #define	MACHINE_ARCH	"riscv32"
     56 #endif
     57 #define	_MACHINE	riscv
     58 #define	MACHINE		"riscv"
     59 
     60 #define	MID_MACHINE	MID_RISCV
     61 
     62 /* RISCV-specific macro to align a stack pointer (downwards). */
     63 #define STACK_ALIGNBYTES	(__BIGGEST_ALIGNMENT__ - 1)
     64 #define	ALIGNBYTES32	__BIGGEST_ALIGNMENT__
     65 
     66 #define NKMEMPAGES_MAX_DEFAULT	(2048UL * 1024 * 1024)
     67 #define NKMEMPAGES_MIN_DEFAULT	(128UL * 1024 * 1024)
     68 
     69 #define PGSHIFT		12
     70 #define	NBPG		(1 << PGSHIFT)
     71 #define PGOFSET		(NBPG - 1)
     72 
     73 #define UPAGES		2
     74 #define	USPACE		(UPAGES << PGSHIFT)
     75 #define USPACE_ALIGN	NBPG
     76 
     77 /*
     78  * Constants related to network buffer management.
     79  * MCLBYTES must be no larger than NBPG (the software page size), and
     80  * NBPG % MCLBYTES must be zero.
     81  */
     82 #define	MSIZE		512		/* size of an mbuf */
     83 
     84 #ifndef MCLSHIFT
     85 #define	MCLSHIFT	11		/* convert bytes to m_buf clusters */
     86 					/* 2K cluster can hold Ether frame */
     87 #endif	/* MCLSHIFT */
     88 
     89 #define	MCLBYTES	(1 << MCLSHIFT)	/* size of a m_buf cluster */
     90 
     91 #ifndef MSGBUFSIZE
     92 #define MSGBUFSIZE		65536	/* default message buffer size */
     93 #endif
     94 
     95 #define COHERENCY_UNIT		64
     96 #define CACHE_LINE_SIZE		64
     97 
     98 #define MAXCPUS			32
     99 
    100 #ifdef _KERNEL
    101 void delay(unsigned long);
    102 #define	DELAY(x)	delay(x)
    103 #endif
    104 
    105 #endif /* _RISCV_PARAM_H_ */
    106