xref: /freebsd/sys/riscv/include/param.h (revision c3d326fd44d9cf4649aa35a62a2766155c8b383d)
18d7e7a98SRuslan Bukin /*-
28d7e7a98SRuslan Bukin  * Copyright (c) 1990 The Regents of the University of California.
38d7e7a98SRuslan Bukin  * All rights reserved.
48d7e7a98SRuslan Bukin  *
58d7e7a98SRuslan Bukin  * This code is derived from software contributed to Berkeley by
68d7e7a98SRuslan Bukin  * William Jolitz.
78d7e7a98SRuslan Bukin  *
88d7e7a98SRuslan Bukin  * Redistribution and use in source and binary forms, with or without
98d7e7a98SRuslan Bukin  * modification, are permitted provided that the following conditions
108d7e7a98SRuslan Bukin  * are met:
118d7e7a98SRuslan Bukin  * 1. Redistributions of source code must retain the above copyright
128d7e7a98SRuslan Bukin  *    notice, this list of conditions and the following disclaimer.
138d7e7a98SRuslan Bukin  * 2. Redistributions in binary form must reproduce the above copyright
148d7e7a98SRuslan Bukin  *    notice, this list of conditions and the following disclaimer in the
158d7e7a98SRuslan Bukin  *    documentation and/or other materials provided with the distribution.
168d7e7a98SRuslan Bukin  *
178d7e7a98SRuslan Bukin  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
188d7e7a98SRuslan Bukin  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
198d7e7a98SRuslan Bukin  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
208d7e7a98SRuslan Bukin  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
218d7e7a98SRuslan Bukin  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
228d7e7a98SRuslan Bukin  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
238d7e7a98SRuslan Bukin  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
248d7e7a98SRuslan Bukin  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
258d7e7a98SRuslan Bukin  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
268d7e7a98SRuslan Bukin  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
278d7e7a98SRuslan Bukin  * SUCH DAMAGE.
288d7e7a98SRuslan Bukin  *
298d7e7a98SRuslan Bukin  *	from: @(#)param.h	5.8 (Berkeley) 6/28/91
308d7e7a98SRuslan Bukin  * $FreeBSD$
318d7e7a98SRuslan Bukin  */
328d7e7a98SRuslan Bukin 
338d7e7a98SRuslan Bukin #ifndef _MACHINE_PARAM_H_
348d7e7a98SRuslan Bukin #define	_MACHINE_PARAM_H_
358d7e7a98SRuslan Bukin 
368d7e7a98SRuslan Bukin /*
378d7e7a98SRuslan Bukin  * Machine dependent constants for RISC-V.
388d7e7a98SRuslan Bukin  */
398d7e7a98SRuslan Bukin 
408d7e7a98SRuslan Bukin #include <machine/_align.h>
418d7e7a98SRuslan Bukin 
428d7e7a98SRuslan Bukin #define	STACKALIGNBYTES	(16 - 1)
438d7e7a98SRuslan Bukin #define	STACKALIGN(p)	((uint64_t)(p) & ~STACKALIGNBYTES)
448d7e7a98SRuslan Bukin 
458d7e7a98SRuslan Bukin #ifndef MACHINE
468d7e7a98SRuslan Bukin #define	MACHINE		"riscv"
478d7e7a98SRuslan Bukin #endif
488d7e7a98SRuslan Bukin #ifndef MACHINE_ARCH
498d7e7a98SRuslan Bukin #define	MACHINE_ARCH	"riscv64"
508d7e7a98SRuslan Bukin #endif
518d7e7a98SRuslan Bukin 
52*c3d326fdSMark Johnston #ifdef SMP
538d7e7a98SRuslan Bukin #ifndef MAXCPU
5417696c12SRuslan Bukin #define	MAXCPU		16
558d7e7a98SRuslan Bukin #endif
568d7e7a98SRuslan Bukin #else
578d7e7a98SRuslan Bukin #define	MAXCPU		1
58*c3d326fdSMark Johnston #endif
598d7e7a98SRuslan Bukin 
608d7e7a98SRuslan Bukin #ifndef MAXMEMDOM
618d7e7a98SRuslan Bukin #define	MAXMEMDOM	1
628d7e7a98SRuslan Bukin #endif
638d7e7a98SRuslan Bukin 
648d7e7a98SRuslan Bukin #define	ALIGNBYTES	_ALIGNBYTES
658d7e7a98SRuslan Bukin #define	ALIGN(p)	_ALIGN(p)
668d7e7a98SRuslan Bukin /*
678d7e7a98SRuslan Bukin  * ALIGNED_POINTER is a boolean macro that checks whether an address
688d7e7a98SRuslan Bukin  * is valid to fetch data elements of type t from on this architecture.
698d7e7a98SRuslan Bukin  * This does not reflect the optimal alignment, just the possibility
708d7e7a98SRuslan Bukin  * (within reasonable limits).
718d7e7a98SRuslan Bukin  */
728d7e7a98SRuslan Bukin #define	ALIGNED_POINTER(p, t)	((((u_long)(p)) & (sizeof(t) - 1)) == 0)
738d7e7a98SRuslan Bukin 
748d7e7a98SRuslan Bukin /*
758d7e7a98SRuslan Bukin  * CACHE_LINE_SIZE is the compile-time maximum cache line size for an
768d7e7a98SRuslan Bukin  * architecture.  It should be used with appropriate caution.
778d7e7a98SRuslan Bukin  */
788d7e7a98SRuslan Bukin #define	CACHE_LINE_SHIFT	6
798d7e7a98SRuslan Bukin #define	CACHE_LINE_SIZE		(1 << CACHE_LINE_SHIFT)
808d7e7a98SRuslan Bukin 
818d7e7a98SRuslan Bukin #define	PAGE_SHIFT	12
828d7e7a98SRuslan Bukin #define	PAGE_SIZE	(1 << PAGE_SHIFT)	/* Page size */
838d7e7a98SRuslan Bukin #define	PAGE_MASK	(PAGE_SIZE - 1)
848d7e7a98SRuslan Bukin 
85f6893f09SMark Johnston #define	MAXPAGESIZES	3	/* maximum number of supported page sizes */
868d7e7a98SRuslan Bukin 
878d7e7a98SRuslan Bukin #ifndef KSTACK_PAGES
888d7e7a98SRuslan Bukin #define	KSTACK_PAGES	4	/* pages of kernel stack (with pcb) */
898d7e7a98SRuslan Bukin #endif
908d7e7a98SRuslan Bukin 
918d7e7a98SRuslan Bukin #define	KSTACK_GUARD_PAGES	1	/* pages of kstack guard; 0 disables */
928d7e7a98SRuslan Bukin #define	PCPU_PAGES		1
938d7e7a98SRuslan Bukin 
948d7e7a98SRuslan Bukin /*
958d7e7a98SRuslan Bukin  * Mach derived conversion macros
968d7e7a98SRuslan Bukin  */
978d7e7a98SRuslan Bukin #define	round_page(x)		(((unsigned long)(x) + PAGE_MASK) & ~PAGE_MASK)
988d7e7a98SRuslan Bukin #define	trunc_page(x)		((unsigned long)(x) & ~PAGE_MASK)
998d7e7a98SRuslan Bukin 
1008d7e7a98SRuslan Bukin #define	atop(x)			((unsigned long)(x) >> PAGE_SHIFT)
1018d7e7a98SRuslan Bukin #define	ptoa(x)			((unsigned long)(x) << PAGE_SHIFT)
1028d7e7a98SRuslan Bukin 
1038d7e7a98SRuslan Bukin #define	riscv_btop(x)		((unsigned long)(x) >> PAGE_SHIFT)
1048d7e7a98SRuslan Bukin #define	riscv_ptob(x)		((unsigned long)(x) << PAGE_SHIFT)
1058d7e7a98SRuslan Bukin 
1068d7e7a98SRuslan Bukin #define	pgtok(x)		((unsigned long)(x) * (PAGE_SIZE / 1024))
1078d7e7a98SRuslan Bukin 
1088d7e7a98SRuslan Bukin #endif /* !_MACHINE_PARAM_H_ */
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