111 lines
3.8 KiB
C
111 lines
3.8 KiB
C
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/* $NetBSD: param.h,v 1.17 2012/02/04 17:56:16 para Exp $ */
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/*
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* Copyright (c) 1994,1995 Mark Brinicombe.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the RiscBSD team.
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* 4. The name "RiscBSD" nor the name of the author may be used to
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* endorse or promote products derived from this software without specific
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* prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY RISCBSD ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL RISCBSD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef _ARM_ARM32_PARAM_H_
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#define _ARM_ARM32_PARAM_H_
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#ifdef _KERNEL
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# include <machine/cpu.h>
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#endif
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/*
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* Machine dependent constants for ARM6+ processors
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*/
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/* These are defined in the Port File before it includes
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* this file. */
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#define PGSHIFT 12 /* LOG2(NBPG) */
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#define NBPG (1 << PGSHIFT) /* bytes/page */
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#define PGOFSET (NBPG-1) /* byte offset into page */
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#define NPTEPG (NBPG/(sizeof (pt_entry_t)))
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#define SSIZE 1 /* initial stack size/NBPG */
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#define SINCR 1 /* increment of stack/NBPG */
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#define UPAGES 2 /* pages of u-area */
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#define USPACE (UPAGES * NBPG) /* total size of u-area */
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#ifndef MSGBUFSIZE
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#define MSGBUFSIZE NBPG /* default message buffer size */
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#endif
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/*
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* Minimum and maximum sizes of the kernel malloc arena in PAGE_SIZE-sized
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* logical pages.
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*/
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#define NKMEMPAGES_MIN_DEFAULT ((8 * 1024 * 1024) >> PAGE_SHIFT)
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#define NKMEMPAGES_MAX_DEFAULT ((128 * 1024 * 1024) >> PAGE_SHIFT)
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/* Constants used to divide the USPACE area */
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/*
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* The USPACE area contains :
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* 1. the pcb structure for the process
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* 2. the fp context for FP emulation
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* 3. the kernel (svc) stack
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*
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* The layout of the area looks like this
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*
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* | uarea | FP context | kernel stack |
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*
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* The size of the uarea is known.
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* The size of the FP context is variable depending of the FP emulator
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* in use and whether there is hardware FP support. However we can put
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* an upper limit on it.
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* The kernel stack should be at least 4K is size.
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*
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* The stack top addresses are used to set the stack pointers. The stack bottom
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* addresses at the addresses monitored by the diagnostic code for stack overflows
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*
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*/
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#define FPCONTEXTSIZE (0x100)
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#define USPACE_SVC_STACK_TOP (USPACE)
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#define USPACE_SVC_STACK_BOTTOM (sizeof(struct pcb) + FPCONTEXTSIZE + 10)
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#define arm_btop(x) ((x) >> PGSHIFT)
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#define arm_ptob(x) ((x) << PGSHIFT)
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#define arm_trunc_page(x) ((unsigned)(x) & ~PGOFSET)
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#ifdef _KERNEL
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#ifndef _LOCORE
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void delay(unsigned);
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#define DELAY(x) delay(x)
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#endif
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#endif
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#include <arm/param.h>
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#endif /* _ARM_ARM32_PARAM_H_ */
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