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/* $NetBSD: param.h,v 1.13 2010/05/06 19:10:26 joerg 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 _AARCH64_PARAM_H_
#define _AARCH64_PARAM_H_
// TODO: These were based on the ARMv7 version. Verify that it is correct.
/*
* 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".
*/
#if defined(_KERNEL)
#undef _MACHINE
#undef MACHINE
#undef _MACHINE_ARCH
#undef MACHINE_ARCH
#define _MACHINE aarch64
#define MACHINE "aarch64"
#define _MACHINE_ARCH aarch64
#define MACHINE_ARCH "aarch64"
#endif /* !_KERNEL */
#define MID_MACHINE MID_AARCH64
/*
* 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
/*
* 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 */
#ifndef MCLSHIFT
#define MCLSHIFT 11 /* convert bytes to m_buf clusters */
/* 2K cluster can hold Ether frame */
#endif /* MCLSHIFT */
#define MCLBYTES (1 << MCLSHIFT) /* size of a m_buf cluster */
#ifndef NMBCLUSTERS_MAX
#define NMBCLUSTERS_MAX (0x2000000 / MCLBYTES) /* Limit to 64MB for clusters */
#endif
/*
* Compatibility /dev/zero mapping.
*/
#ifdef _KERNEL
#ifdef COMPAT_16
#define COMPAT_ZERODEV(x) (x == makedev(0, _DEV_ZERO_oARM))
#endif
#endif /* _KERNEL */
#endif /* _AARCH64_PARAM_H_ */
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