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 * $FreeBSD$ 31 */ 32 33 #ifndef _MACHINE_PARAM_H_ 34 #define _MACHINE_PARAM_H_ 35 36 /* 37 * Machine dependent constants for RISC-V. 38 */ 39 40 #include <machine/_align.h> 41 42 #define STACKALIGNBYTES (16 - 1) 43 #define STACKALIGN(p) ((uint64_t)(p) & ~STACKALIGNBYTES) 44 45 #ifndef MACHINE 46 #define MACHINE "riscv" 47 #endif 48 #ifndef MACHINE_ARCH 49 #define MACHINE_ARCH "riscv64" 50 #endif 51 52 #if defined(SMP) || defined(KLD_MODULE) 53 #ifndef MAXCPU 54 #define MAXCPU 16 55 #endif 56 #else 57 #define MAXCPU 1 58 #endif /* SMP || KLD_MODULE */ 59 60 #ifndef MAXMEMDOM 61 #define MAXMEMDOM 1 62 #endif 63 64 #define ALIGNBYTES _ALIGNBYTES 65 #define ALIGN(p) _ALIGN(p) 66 /* 67 * ALIGNED_POINTER is a boolean macro that checks whether an address 68 * is valid to fetch data elements of type t from on this architecture. 69 * This does not reflect the optimal alignment, just the possibility 70 * (within reasonable limits). 71 */ 72 #define ALIGNED_POINTER(p, t) ((((u_long)(p)) & (sizeof(t) - 1)) == 0) 73 74 /* 75 * CACHE_LINE_SIZE is the compile-time maximum cache line size for an 76 * architecture. It should be used with appropriate caution. 77 */ 78 #define CACHE_LINE_SHIFT 6 79 #define CACHE_LINE_SIZE (1 << CACHE_LINE_SHIFT) 80 81 #define PAGE_SHIFT 12 82 #define PAGE_SIZE (1 << PAGE_SHIFT) /* Page size */ 83 #define PAGE_MASK (PAGE_SIZE - 1) 84 85 #define MAXPAGESIZES 1 /* maximum number of supported page sizes */ 86 87 #ifndef KSTACK_PAGES 88 #define KSTACK_PAGES 4 /* pages of kernel stack (with pcb) */ 89 #endif 90 91 #define KSTACK_GUARD_PAGES 1 /* pages of kstack guard; 0 disables */ 92 #define PCPU_PAGES 1 93 94 /* 95 * Mach derived conversion macros 96 */ 97 #define round_page(x) (((unsigned long)(x) + PAGE_MASK) & ~PAGE_MASK) 98 #define trunc_page(x) ((unsigned long)(x) & ~PAGE_MASK) 99 100 #define atop(x) ((unsigned long)(x) >> PAGE_SHIFT) 101 #define ptoa(x) ((unsigned long)(x) << PAGE_SHIFT) 102 103 #define riscv_btop(x) ((unsigned long)(x) >> PAGE_SHIFT) 104 #define riscv_ptob(x) ((unsigned long)(x) << PAGE_SHIFT) 105 106 #define pgtok(x) ((unsigned long)(x) * (PAGE_SIZE / 1024)) 107 108 #endif /* !_MACHINE_PARAM_H_ */ 109