/* $NetBSD: param.h,v 1.10 2026/05/04 18:23:31 skrll Exp $ */

/*-
 * Copyright (c) 2014 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Matt Thomas of 3am Software Foundry.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef _RISCV_PARAM_H_
#define _RISCV_PARAM_H_

#ifdef _KERNEL_OPT
#include "opt_param.h"
#endif

/*
 * Machine dependent constants for all RISC-V processors
 */

/*
 * For KERNEL code:
 *      MACHINE must be defined by the individual port.  This is so that
 *      uname returns the correct thing, etc.
 *
 * For non-KERNEL code:
 *      If ELF, MACHINE and MACHINE_ARCH are forced to "riscv".
 */

#ifdef _LP64
#define _MACHINE_ARCH           riscv64
#define MACHINE_ARCH            "riscv64"
#define _MACHINE_ARCH32         riscv32
#define MACHINE_ARCH32          "riscv32"
#else
#define _MACHINE_ARCH           riscv32
#define MACHINE_ARCH            "riscv32"
#endif
#define _MACHINE                riscv
#define MACHINE                 "riscv"

#define MID_MACHINE             MID_RISCV

/* RISC-V specific macro to align a stack pointer (downwards). */
#define STACK_ALIGNBYTES        (16UL - 1)
#define ALIGNBYTES32            __BIGGEST_ALIGNMENT__

#define NKMEMPAGES_MIN_DEFAULT          ((128UL * 1024 * 1024) >> PAGE_SHIFT)
#define NKMEMPAGES_MAX_UNLIMITED        1

#define PGSHIFT                 12
#define NBPG                    (1 << PGSHIFT)
#define PGOFSET                 (NBPG - 1)

#define UPAGES                  2
#define USPACE                  (UPAGES << PGSHIFT)
#define USPACE_ALIGN            NBPG

/*
 * Constants related to network buffer management.
 * MCLBYTES must be no larger than NBPG (the software page size), and
 * NBPG % MCLBYTES must be zero.
 */
#define MSIZE                   512             /* size of an mbuf */

#ifndef MCLSHIFT
#define MCLSHIFT                11              /* convert bytes to m_buf clusters */
                                                /* 2K cluster can hold Ether frame */
#endif  /* MCLSHIFT */

#define MCLBYTES                (1 << MCLSHIFT) /* size of a m_buf cluster */

#ifndef MSGBUFSIZE
#define MSGBUFSIZE              65536           /* default message buffer size */
#endif

#define MAXCPUS                 32

#ifdef _KERNEL
#ifndef __HIDE_DELAY
void delay(unsigned long);
#define DELAY(x)                delay(x)
#endif
#endif

#define riscv_btop(x)           ((unsigned long)(x) >> PGSHIFT)
#define riscv_ptob(x)           ((unsigned long)(x) << PGSHIFT)


#endif /* _RISCV_PARAM_H_ */