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      1 /* $NetBSD: param.h,v 1.8 2023/05/07 12:41:48 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 #ifdef _KERNEL_OPT
     36 #include "opt_param.h"
     37 #endif
     38 
     39 /*
     40  * Machine dependent constants for all OpenRISC processors
     41  */
     42 
     43 /*
     44  * For KERNEL code:
     45  *	MACHINE must be defined by the individual port.  This is so that
     46  *	uname returns the correct thing, etc.
     47  *
     48  * For non-KERNEL code:
     49  *	If ELF, MACHINE and MACHINE_ARCH are forced to "or1k/or1k".
     50  */
     51 
     52 #ifdef _LP64
     53 #define	_MACHINE_ARCH		riscv64
     54 #define	MACHINE_ARCH		"riscv64"
     55 #define	_MACHINE_ARCH32		riscv32
     56 #define	MACHINE_ARCH32		"riscv32"
     57 #else
     58 #define	_MACHINE_ARCH		riscv32
     59 #define	MACHINE_ARCH		"riscv32"
     60 #endif
     61 #define	_MACHINE		riscv
     62 #define	MACHINE			"riscv"
     63 
     64 #define	MID_MACHINE		MID_RISCV
     65 
     66 /* RISC-V specific macro to align a stack pointer (downwards). */
     67 #define STACK_ALIGNBYTES	(16UL - 1)
     68 #define	ALIGNBYTES32		__BIGGEST_ALIGNMENT__
     69 
     70 #define NKMEMPAGES_MIN_DEFAULT		((128UL * 1024 * 1024) >> PAGE_SHIFT)
     71 #define NKMEMPAGES_MAX_UNLIMITED	1
     72 
     73 #define PGSHIFT			12
     74 #define	NBPG			(1 << PGSHIFT)
     75 #define PGOFSET			(NBPG - 1)
     76 
     77 #define UPAGES			2
     78 #define	USPACE			(UPAGES << PGSHIFT)
     79 #define USPACE_ALIGN		NBPG
     80 
     81 /*
     82  * Constants related to network buffer management.
     83  * MCLBYTES must be no larger than NBPG (the software page size), and
     84  * NBPG % MCLBYTES must be zero.
     85  */
     86 #define	MSIZE			512		/* size of an mbuf */
     87 
     88 #ifndef MCLSHIFT
     89 #define	MCLSHIFT		11		/* convert bytes to m_buf clusters */
     90 						/* 2K cluster can hold Ether frame */
     91 #endif	/* MCLSHIFT */
     92 
     93 #define	MCLBYTES		(1 << MCLSHIFT)	/* size of a m_buf cluster */
     94 
     95 #ifndef MSGBUFSIZE
     96 #define MSGBUFSIZE		65536		/* default message buffer size */
     97 #endif
     98 
     99 #define MAXCPUS			32
    100 
    101 #ifdef _KERNEL
    102 void delay(unsigned long);
    103 #define	DELAY(x)		delay(x)
    104 #endif
    105 
    106 #define riscv_btop(x)		((unsigned long)(x) >> PGSHIFT)
    107 #define riscv_ptob(x)		((unsigned long)(x) << PGSHIFT)
    108 
    109 
    110 #endif /* _RISCV_PARAM_H_ */
    111