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/* $OpenBSD: param.h,v 1.23 2016/09/03 14:25:27 bluhm 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
#define MID_MACHINE MID_ARM6
#define PAGE_SHIFT 12
#define PAGE_SIZE (1 << PAGE_SHIFT)
#define PAGE_MASK (PAGE_SIZE - 1)
#ifdef _KERNEL
#define NPTEPG (PAGE_SIZE/(sizeof (pt_entry_t)))
#define NBPG PAGE_SIZE
#define PGSHIFT PAGE_SHIFT
#define PGOFSET PAGE_MASK
#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 */
#define NMBCLUSTERS (16 * 1024) /* max cluster allocation */
/*
* Maximum size of the kernel malloc arena in PAGE_SIZE-sized
* logical pages.
*/
#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
* of the FP emulators
* The kernel stack should be at least 4K in size.
*
* The stack top addresses are used to set the stack pointers. The stack bottom
* addresses are 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)
#ifndef _LOCORE
void delay (unsigned);
#define DELAY(x) delay(x)
#endif
#if !defined(_LOCORE)
#include <machine/cpu.h>
#endif
/* ARM-specific macro to align a stack pointer (downwards). */
#define STACKALIGNBYTES (8 - 1)
#define STACKALIGN(p) ((u_long)(p) &~ STACKALIGNBYTES)
#endif /* _KERNEL */
#endif /* _ARM_PARAM_H_ */
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