/* $NetBSD: param.h,v 1.10 1997/10/14 09:20:25 mark 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 _ARM32_PARAM_H_ #define _ARM32_PARAM_H_ #ifdef _KERNEL # include #endif /* * Machine dependent constants for ARM6+ processors */ /*#define ovbcopy bcopy */ /* XXX should probably have long gone by now */ #define _MACHINE arm32 #define MACHINE "arm32" #define _MACHINE_ARCH arm32 #define MACHINE_ARCH "arm32" #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) #define PGSHIFT 12 /* LOG2(NBPG) */ #define NBPG (1 << PGSHIFT) /* bytes/page */ #define PGOFSET (NBPG-1) /* byte offset into page */ #define NPTEPG (NBPG/(sizeof (pt_entry_t))) #define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */ #define DEV_BSIZE (1 << DEV_BSHIFT) #define BLKDEV_IOSIZE 2048 #define MAXPHYS (64 * 1024) /* max raw I/O transfer size */ #define CLSIZELOG2 0 #define CLSIZE (1 << CLSIZELOG2) /* NOTE: SSIZE, SINCR and UPAGES must be multiples of CLSIZE */ #define SSIZE 1 /* initial stack size/NBPG */ #define SINCR 1 /* increment of stack/NBPG */ #define UPAGES 2 /* pages of u-area */ #define USPACE (UPAGES * NBPG) /* total size of u-area */ #ifndef MSGBUFSIZE #define MSGBUFSIZE NBPG /* default message buffer size */ #endif /* * Constants related to network buffer management. * MCLBYTES must be no larger than CLBYTES (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 128 /* size of an mbuf */ #define MCLSHIFT 11 /* convert bytes to m_buf clusters */ #define MCLBYTES (1 << MCLSHIFT) /* size of a m_buf cluster */ #define MCLOFSET (MCLBYTES - 1) /* offset within a m_buf cluster */ #ifndef NMBCLUSTERS #ifdef GATEWAY #define NMBCLUSTERS 512 /* map size, max cluster allocation */ #else #define NMBCLUSTERS 256 /* map size, max cluster allocation */ #endif #endif /* * Size of kernel malloc arena in CLBYTES-sized logical pages */ #ifndef NKMEMCLUSTERS #define NKMEMCLUSTERS (6 * 1024 * 1024 / CLBYTES) #endif /* pages ("clicks") (4096 bytes) to disk blocks */ #define ctod(x) ((x) << (PGSHIFT - DEV_BSHIFT)) #define dtoc(x) ((x) >> (PGSHIFT - DEV_BSHIFT)) /*#define dtob(x) ((x) << DEV_BSHIFT)*/ #define ctob(x) ((x) << PGSHIFT) /* bytes to pages */ #define btoc(x) (((x) + PGOFSET) >> PGSHIFT) #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)) /* Define various base addresses */ #define KERNEL_BASE 0xf0000000 #define KERNEL_VM_BASE 0xf1000000 #define PAGE_DIRS_BASE 0xf3000000 #define ALT_PAGE_TBLS_BASE 0xf3c00000 #define CURRENT_PAGEDIR_BASE 0xeffd4000 #define PROCESS_PAGE_TBLS_BASE 0xefc00000 #define KERNBASE KERNEL_BASE /* 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) #define arm_byte_to_page(x) (x >> PGSHIFT) #define arm_page_to_byte(x) (x << PGSHIFT) #ifdef _KERNEL #ifndef _LOCORE void delay __P((unsigned)); #define DELAY(x) delay(x) #endif #endif #endif /* _ARM_PARAM_H_ */