/* $OpenBSD: param.h,v 1.9 2005/11/09 18:08:37 martin Exp $ */ /* $NetBSD: param.h,v 1.9 2002/03/24 03:37:23 thorpej Exp $ */ /* * Copyright (c) 1994,1995 Mark Brinicombe. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the RiscBSD team. * 4. The name "RiscBSD" nor the name of the author may be used to * endorse or promote products derived from this software without specific * prior written permission. * * THIS SOFTWARE IS PROVIDED BY RISCBSD ``AS IS'' AND ANY EXPRESS OR IMPLIED * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL RISCBSD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #ifndef _ARM_PARAM_H_ #define _ARM_PARAM_H_ #define MACHINE_ARCH "arm" #define _MACHINE_ARCH arm /* * Machine dependent constants for ARM6+ processors */ /* These are defined in the Port File before it includes * this file. */ #define PAGE_SHIFT 12 /* LOG2(NBPG) */ #define PGSHIFT 12 /* LOG2(NBPG) */ #define PAGE_SIZE (1 << PAGE_SHIFT) /* bytes/page */ #define NBPG (1 << PAGE_SHIFT) /* bytes/page */ #define PAGE_MASK (PAGE_SIZE - 1) #define PGOFSET (PAGE_SIZE - 1) #define NPTEPG (PAGE_SIZE/(sizeof (pt_entry_t))) #define UPAGES 2 /* pages of u-area */ #define USPACE (UPAGES * PAGE_SIZE) /* total size of u-area */ #define USPACE_ALIGN (0) /* u-area alignment 0-none */ #ifndef MSGBUFSIZE #define MSGBUFSIZE PAGE_SIZE /* default message buffer size */ #endif /* * Minimum and maximum sizes of the kernel malloc arena in PAGE_SIZE-sized * logical pages. */ #define NKMEMPAGES_MIN_DEFAULT ((4 * 1024 * 1024) >> PAGE_SHIFT) #define NKMEMPAGES_MAX_DEFAULT ((64 * 1024 * 1024) >> PAGE_SHIFT) /* Constants used to divide the USPACE area */ /* * The USPACE area contains : * 1. the user structure for the process * 2. the fp context for FP emulation * 3. the kernel (svc) stack * 4. the undefined instruction stack * * The layout of the area looks like this * * | user area | FP context | undefined stack | kernel stack | * * The size of the user area is known. * The size of the FP context is variable depending of the FP emulator * in use and whether there is hardware FP support. However we can put * an upper limit on it. * The undefined stack needs to be at least 512 bytes. This is a requirement * if the FP emulators * The kernel stack should be at least 4K is size. * * The stack top addresses are used to set the stack pointers. The stack bottom * addresses at the addresses monitored by the diagnostic code for stack overflows * */ #define FPCONTEXTSIZE (0x100) #define USPACE_SVC_STACK_TOP (USPACE) #define USPACE_SVC_STACK_BOTTOM (USPACE_SVC_STACK_TOP - 0x1000) #define USPACE_UNDEF_STACK_TOP (USPACE_SVC_STACK_BOTTOM - 0x10) #define USPACE_UNDEF_STACK_BOTTOM (sizeof(struct user) + FPCONTEXTSIZE + 10) #ifdef _KERNEL #ifndef _LOCORE void delay (unsigned); #define DELAY(x) delay(x) #endif #endif /* * Machine dependent constants for all ARM processors */ /* * For KERNEL code: * MACHINE must be defined by the individual port. This is so that * uname returns the correct thing, etc. * * MACHINE_ARCH may be defined by individual ports as a temporary * measure while we're finishing the conversion to ELF. * * For non-KERNEL code: * If ELF, MACHINE and MACHINE_ARCH are forced to "arm/armeb". */ #define MID_MACHINE MID_ARM6 /* * Round p (pointer or byte index) up to a correctly-aligned value * for all data types (int, long, ...). The result is u_int and * must be cast to any desired pointer type. * * ALIGNED_POINTER is a boolean macro that checks whether an address * is valid to fetch data elements of type t from on this architecture. * This does not reflect the optimal alignment, just the possibility * (within reasonable limits). * */ #define ALIGNBYTES (sizeof(int) - 1) #define ALIGN(p) (((u_int)(p) + ALIGNBYTES) &~ ALIGNBYTES) #define ALIGNED_POINTER(p,t) ((((u_long)(p)) & (sizeof(t)-1)) == 0) /* ARM-specific macro to align a stack pointer (downwards). */ #define STACKALIGNBYTES (8 - 1) #define STACKALIGN(p) ((u_int)(p) &~ STACKALIGNBYTES) #define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */ #define DEV_BSIZE (1 << DEV_BSHIFT) #define BLKDEV_IOSIZE 2048 #ifndef MAXPHYS #define MAXPHYS 65536 /* max I/O transfer size */ #endif /* pages ("clicks") to disk blocks */ #define ctod(x) ((x) << (PAGE_SHIFT - DEV_BSHIFT)) #define dtoc(x) ((x) >> (PAGE_SHIFT - DEV_BSHIFT)) /*#define dtob(x) ((x) << DEV_BSHIFT)*/ #define ctob(x) ((x) << PAGE_SHIFT) /* bytes to pages */ #define btoc(x) (((x) + PAGE_MASK) >> PAGE_SHIFT) #define btodb(bytes) /* calculates (bytes / DEV_BSIZE) */ \ ((bytes) >> DEV_BSHIFT) #define dbtob(db) /* calculates (db * DEV_BSIZE) */ \ ((db) << DEV_BSHIFT) /* * Map a ``block device block'' to a file system block. * This should be device dependent, and should use the bsize * field from the disk label. * For now though just use DEV_BSIZE. */ #define bdbtofsb(bn) ((bn) / (BLKDEV_IOSIZE / DEV_BSIZE)) /* * Constants related to network buffer management. * MCLBYTES must be no larger than NBPG (the software page size), and, * on machines that exchange pages of input or output buffers with mbuf * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple * of the hardware page size. */ #define MSIZE 256 /* size of an mbuf */ #define MCLSHIFT 11 /* convert bytes to m_buf clusters */ /* 2K cluster can hold Ether frame */ #define MCLBYTES (1 << MCLSHIFT) /* size of a m_buf cluster */ #define NMBCLUSTERS 4096 /* map size, max cluster allocation */ #define ovbcopy bcopy #ifdef _KERNEL #ifdef _LOCORE #include #else #include #include #endif #endif #endif /* _ARM_PARAM_H_ */