1 /* $NetBSD: param.h,v 1.4 2001/05/30 12:28:40 mrg Exp $ */ 2 3 /* 4 * Copyright (c) 1994,1995 Mark Brinicombe. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the RiscBSD team. 18 * 4. The name "RiscBSD" nor the name of the author may be used to 19 * endorse or promote products derived from this software without specific 20 * prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY RISCBSD ``AS IS'' AND ANY EXPRESS OR IMPLIED 23 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 24 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 25 * IN NO EVENT SHALL RISCBSD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 26 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 27 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 28 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 #ifndef _ARM_ARM32_PARAM_H_ 36 #define _ARM_ARM32_PARAM_H_ 37 38 #ifdef _KERNEL 39 # include <machine/cpu.h> 40 #endif 41 42 /* 43 * Machine dependent constants for ARM6+ processors 44 */ 45 /* These are defined in the Port File before it includes 46 * this file. */ 47 #define MID_MACHINE MID_ARM6 48 49 /* 50 * Round p (pointer or byte index) up to a correctly-aligned value 51 * for all data types (int, long, ...). The result is u_int and 52 * must be cast to any desired pointer type. 53 * 54 * ALIGNED_POINTER is a boolean macro that checks whether an address 55 * is valid to fetch data elements of type t from on this architecture. 56 * This does not reflect the optimal alignment, just the possibility 57 * (within reasonable limits). 58 * 59 */ 60 #define ALIGNBYTES (sizeof(int) - 1) 61 #define ALIGN(p) (((u_int)(p) + ALIGNBYTES) &~ ALIGNBYTES) 62 #define ALIGNED_POINTER(p,t) ((((u_long)(p)) & (sizeof(t)-1)) == 0) 63 64 #define PGSHIFT 12 /* LOG2(NBPG) */ 65 #define NBPG (1 << PGSHIFT) /* bytes/page */ 66 #define PGOFSET (NBPG-1) /* byte offset into page */ 67 #define NPTEPG (NBPG/(sizeof (pt_entry_t))) 68 69 70 #define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */ 71 #define DEV_BSIZE (1 << DEV_BSHIFT) 72 #define BLKDEV_IOSIZE 2048 73 #define MAXPHYS (64 * 1024) /* max raw I/O transfer size */ 74 75 #define SSIZE 1 /* initial stack size/NBPG */ 76 #define SINCR 1 /* increment of stack/NBPG */ 77 #define UPAGES 2 /* pages of u-area */ 78 #define USPACE (UPAGES * NBPG) /* total size of u-area */ 79 80 #ifndef MSGBUFSIZE 81 #define MSGBUFSIZE NBPG /* default message buffer size */ 82 #endif 83 84 /* 85 * Constants related to network buffer management. 86 * MCLBYTES must be no larger than NBPG (the software page size), and, 87 * on machines that exchange pages of input or output buffers with mbuf 88 * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple 89 * of the hardware page size. 90 */ 91 #define MSIZE 256 /* size of an mbuf */ 92 #define MCLSHIFT 11 /* convert bytes to m_buf clusters */ 93 #define MCLBYTES (1 << MCLSHIFT) /* size of a m_buf cluster */ 94 #define MCLOFSET (MCLBYTES - 1) /* offset within a m_buf cluster */ 95 96 #ifndef NMBCLUSTERS 97 98 #if defined(_KERNEL_OPT) 99 #include "opt_gateway.h" 100 #endif 101 102 #ifdef GATEWAY 103 #define NMBCLUSTERS 512 /* map size, max cluster allocation */ 104 #else 105 #define NMBCLUSTERS 256 /* map size, max cluster allocation */ 106 #endif 107 #endif 108 109 /* 110 * Minimum and maximum sizes of the kernel malloc arena in PAGE_SIZE-sized 111 * logical pages. 112 */ 113 #define NKMEMPAGES_MIN_DEFAULT ((6 * 1024 * 1024) >> PAGE_SHIFT) 114 #define NKMEMPAGES_MAX_DEFAULT ((7 * 1024 * 1024) >> PAGE_SHIFT) 115 116 /* pages ("clicks") (4096 bytes) to disk blocks */ 117 #define ctod(x) ((x) << (PGSHIFT - DEV_BSHIFT)) 118 #define dtoc(x) ((x) >> (PGSHIFT - DEV_BSHIFT)) 119 /*#define dtob(x) ((x) << DEV_BSHIFT)*/ 120 121 #define ctob(x) ((x) << PGSHIFT) 122 123 /* bytes to pages */ 124 #define btoc(x) (((x) + PGOFSET) >> PGSHIFT) 125 126 #define btodb(bytes) /* calculates (bytes / DEV_BSIZE) */ \ 127 ((bytes) >> DEV_BSHIFT) 128 #define dbtob(db) /* calculates (db * DEV_BSIZE) */ \ 129 ((db) << DEV_BSHIFT) 130 131 /* 132 * Map a ``block device block'' to a file system block. 133 * This should be device dependent, and should use the bsize 134 * field from the disk label. 135 * For now though just use DEV_BSIZE. 136 */ 137 #define bdbtofsb(bn) ((bn) / (BLKDEV_IOSIZE / DEV_BSIZE)) 138 139 /* Constants used to divide the USPACE area */ 140 141 /* 142 * The USPACE area contains : 143 * 1. the user structure for the process 144 * 2. the fp context for FP emulation 145 * 3. the kernel (svc) stack 146 * 4. the undefined instruction stack 147 * 148 * The layout of the area looks like this 149 * 150 * | user area | FP context | undefined stack | kernel stack | 151 * 152 * The size of the user area is known. 153 * The size of the FP context is variable depending of the FP emulator 154 * in use and whether there is hardware FP support. However we can put 155 * an upper limit on it. 156 * The undefined stack needs to be at least 512 bytes. This is a requirement 157 * if the FP emulators 158 * The kernel stack should be at least 4K is size. 159 * 160 * The stack top addresses are used to set the stack pointers. The stack bottom 161 * addresses at the addresses monitored by the diagnostic code for stack overflows 162 * 163 */ 164 165 #define FPCONTEXTSIZE (0x100) 166 #define USPACE_SVC_STACK_TOP (USPACE) 167 #define USPACE_SVC_STACK_BOTTOM (USPACE_SVC_STACK_TOP - 0x1000) 168 #define USPACE_UNDEF_STACK_TOP (USPACE_SVC_STACK_BOTTOM - 0x10) 169 #define USPACE_UNDEF_STACK_BOTTOM (sizeof(struct user) + FPCONTEXTSIZE + 10) 170 171 #define arm_byte_to_page(x) ((x) >> PGSHIFT) 172 #define arm_page_to_byte(x) ((x) << PGSHIFT) 173 174 #ifdef _KERNEL 175 #ifndef _LOCORE 176 void delay __P((unsigned)); 177 #define DELAY(x) delay(x) 178 #endif 179 #endif 180 181 #endif /* _ARM_ARM32_PARAM_H_ */ 182