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/* $NetBSD: param.h,v 1.6 1996/03/14 23:11:27 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 <machine/cpu.h>
#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.
*/
#define ALIGNBYTES (sizeof(int) - 1)
#define ALIGN(p) (((u_int)(p) + ALIGNBYTES) &~ ALIGNBYTES)
#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 */
/*
* 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) (((unsigned)(x) + PGOFSET) >> PGSHIFT)
#define btodb(bytes) /* calculates (bytes / DEV_BSIZE) */ \
((unsigned)(bytes) >> DEV_BSHIFT)
#define dbtob(db) /* calculates (db * DEV_BSIZE) */ \
((unsigned)(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_ */
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