1 /* $NetBSD: param.h,v 1.16 2011/01/14 02:06:24 rmind 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 48 #define PGSHIFT 12 /* LOG2(NBPG) */ 49 #define NBPG (1 << PGSHIFT) /* bytes/page */ 50 #define PGOFSET (NBPG-1) /* byte offset into page */ 51 #define NPTEPG (NBPG/(sizeof (pt_entry_t))) 52 53 54 #define SSIZE 1 /* initial stack size/NBPG */ 55 #define SINCR 1 /* increment of stack/NBPG */ 56 #define UPAGES 2 /* pages of u-area */ 57 #define USPACE (UPAGES * NBPG) /* total size of u-area */ 58 59 #ifndef MSGBUFSIZE 60 #define MSGBUFSIZE NBPG /* default message buffer size */ 61 #endif 62 63 /* 64 * Minimum and maximum sizes of the kernel malloc arena in PAGE_SIZE-sized 65 * logical pages. 66 */ 67 #define NKMEMPAGES_MIN_DEFAULT ((6 * 1024 * 1024) >> PAGE_SHIFT) 68 #define NKMEMPAGES_MAX_DEFAULT ((7 * 1024 * 1024) >> PAGE_SHIFT) 69 70 /* Constants used to divide the USPACE area */ 71 72 /* 73 * The USPACE area contains : 74 * 1. the pcb structure for the process 75 * 2. the fp context for FP emulation 76 * 3. the kernel (svc) stack 77 * 78 * The layout of the area looks like this 79 * 80 * | uarea | FP context | kernel stack | 81 * 82 * The size of the uarea is known. 83 * The size of the FP context is variable depending of the FP emulator 84 * in use and whether there is hardware FP support. However we can put 85 * an upper limit on it. 86 * The kernel stack should be at least 4K is size. 87 * 88 * The stack top addresses are used to set the stack pointers. The stack bottom 89 * addresses at the addresses monitored by the diagnostic code for stack overflows 90 * 91 */ 92 93 #define FPCONTEXTSIZE (0x100) 94 #define USPACE_SVC_STACK_TOP (USPACE) 95 #define USPACE_SVC_STACK_BOTTOM (sizeof(struct pcb) + FPCONTEXTSIZE + 10) 96 97 #define arm_btop(x) ((x) >> PGSHIFT) 98 #define arm_ptob(x) ((x) << PGSHIFT) 99 #define arm_trunc_page(x) ((unsigned)(x) & ~PGOFSET) 100 101 #ifdef _KERNEL 102 #ifndef _LOCORE 103 void delay(unsigned); 104 #define DELAY(x) delay(x) 105 #endif 106 #endif 107 108 #include <arm/param.h> 109 110 #endif /* _ARM_ARM32_PARAM_H_ */ 111