1/*-
  2 * Copyright (c) 1990 The Regents of the University of California.
  3 * All rights reserved.
  4 *
  5 * This code is derived from software contributed to Berkeley by
  6 * William Jolitz.
  7 *
  8 * Redistribution and use in source and binary forms, with or without
  9 * modification, are permitted provided that the following conditions
 10 * are met:
 11 * 1. Redistributions of source code must retain the above copyright
 12 *    notice, this list of conditions and the following disclaimer.
 13 * 2. Redistributions in binary form must reproduce the above copyright
 14 *    notice, this list of conditions and the following disclaimer in the
 15 *    documentation and/or other materials provided with the distribution.
 16 *
 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 20 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 27 * SUCH DAMAGE.
 28 *
 29 *	from: @(#)param.h	5.8 (Berkeley) 6/28/91
 30 */
 31
 32#ifndef _MACHINE_PARAM_H_
 33#define	_MACHINE_PARAM_H_
 34
 35/*
 36 * Machine dependent constants for RISC-V.
 37 */
 38
 39#include <machine/_align.h>
 40
 41#define	STACKALIGNBYTES	(16 - 1)
 42#define	STACKALIGN(p)	((uint64_t)(p) & ~STACKALIGNBYTES)
 43
 44#define __PCI_REROUTE_INTERRUPT
 45
 46#ifndef MACHINE
 47#define	MACHINE		"riscv"
 48#endif
 49#ifndef MACHINE_ARCH
 50#define	MACHINE_ARCH	"riscv64"
 51#endif
 52
 53#ifdef SMP
 54#ifndef MAXCPU
 55#define	MAXCPU		16
 56#endif
 57#else
 58#define	MAXCPU		1
 59#endif
 60
 61#ifndef MAXMEMDOM
 62#define	MAXMEMDOM	1
 63#endif
 64
 65#define	ALIGNBYTES	_ALIGNBYTES
 66#define	ALIGN(p)	_ALIGN(p)
 67/*
 68 * ALIGNED_POINTER is a boolean macro that checks whether an address
 69 * is valid to fetch data elements of type t from on this architecture.
 70 * This does not reflect the optimal alignment, just the possibility
 71 * (within reasonable limits).
 72 */
 73#define	ALIGNED_POINTER(p, t)	((((u_long)(p)) & (sizeof(t) - 1)) == 0)
 74
 75/*
 76 * CACHE_LINE_SIZE is the compile-time maximum cache line size for an
 77 * architecture.  It should be used with appropriate caution.
 78 */
 79#define	CACHE_LINE_SHIFT	6
 80#define	CACHE_LINE_SIZE		(1 << CACHE_LINE_SHIFT)
 81
 82#define	PAGE_SHIFT	12
 83#define	PAGE_SIZE	(1 << PAGE_SHIFT)	/* Page size */
 84#define	PAGE_MASK	(PAGE_SIZE - 1)
 85
 86#define	MAXPAGESIZES	3	/* maximum number of supported page sizes */
 87
 88#ifndef KSTACK_PAGES
 89#define	KSTACK_PAGES	4	/* pages of kernel stack (with pcb) */
 90#endif
 91
 92#define	KSTACK_GUARD_PAGES	1	/* pages of kstack guard; 0 disables */
 93#define	PCPU_PAGES		1
 94
 95/*
 96 * Mach derived conversion macros
 97 */
 98#define	round_page(x)		(((unsigned long)(x) + PAGE_MASK) & ~PAGE_MASK)
 99#define	trunc_page(x)		((unsigned long)(x) & ~PAGE_MASK)
100
101#define	atop(x)			((unsigned long)(x) >> PAGE_SHIFT)
102#define	ptoa(x)			((unsigned long)(x) << PAGE_SHIFT)
103
104#define	riscv_btop(x)		((unsigned long)(x) >> PAGE_SHIFT)
105#define	riscv_ptob(x)		((unsigned long)(x) << PAGE_SHIFT)
106
107#define	pgtok(x)		((unsigned long)(x) * (PAGE_SIZE / 1024))
108
109#endif /* !_MACHINE_PARAM_H_ */