1 /* $NetBSD: param.h,v 1.1 2014/09/19 17:36:26 matt 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 /* 36 * Machine dependent constants for all OpenRISC processors 37 */ 38 39 /* 40 * For KERNEL code: 41 * MACHINE must be defined by the individual port. This is so that 42 * uname returns the correct thing, etc. 43 * 44 * For non-KERNEL code: 45 * If ELF, MACHINE and MACHINE_ARCH are forced to "or1k/or1k". 46 */ 47 48 #ifdef _LP64 49 #define _MACHINE_ARCH riscv64 50 #define MACHINE_ARCH "riscv64" 51 #define _MACHINE_ARCH32 riscv32 52 #define MACHINE_ARCH32 "riscv32" 53 #else 54 #define _MACHINE_ARCH riscv32 55 #define MACHINE_ARCH "riscv32" 56 #endif 57 #define _MACHINE riscv 58 #define MACHINE "riscv" 59 60 #define MID_MACHINE MID_RISCV 61 62 /* RISCV-specific macro to align a stack pointer (downwards). */ 63 #define STACK_ALIGNBYTES (__BIGGEST_ALIGNMENT__ - 1) 64 #define ALIGNBYTES32 __BIGGEST_ALIGNMENT__ 65 66 #define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */ 67 #define DEV_BSIZE (1 << DEV_BSHIFT) 68 #define BLKDEV_IOSIZE 2048 69 70 #ifndef MAXPHYS 71 #define MAXPHYS 65536 /* max I/O transfer size */ 72 #endif 73 74 #define NKMEMPAGES_MAX_DEFAULT (2048UL * 1024 * 1024) 75 #define NKMEMPAGES_MIN_DEFAULT (128UL * 1024 * 1024) 76 77 #ifdef _LP64 78 #define PGSHIFT 13 79 #else 80 #define PGSHIFT 12 81 #endif 82 #define NBPG (1 << PGSHIFT) 83 #define PGOFSET (NBPG - 1) 84 85 #define UPAGES 2 86 #define USPACE (UPAGES << PGSHIFT) 87 #define USPACE_ALIGN NBPG 88 89 /* 90 * Constants related to network buffer management. 91 * MCLBYTES must be no larger than NBPG (the software page size), and 92 * NBPG % MCLBYTES must be zero. 93 */ 94 #define MSIZE 512 /* size of an mbuf */ 95 96 #ifndef MCLSHIFT 97 #define MCLSHIFT 11 /* convert bytes to m_buf clusters */ 98 /* 2K cluster can hold Ether frame */ 99 #endif /* MCLSHIFT */ 100 101 #define MCLBYTES (1 << MCLSHIFT) /* size of a m_buf cluster */ 102 103 #ifdef _KERNEL 104 void delay(unsigned long); 105 #define DELAY(x) delay(x) 106 #endif 107 108 #endif /* _RISCV_PARAM_H_ */ 109