/* $OpenBSD: param.h,v 1.25 2023/12/14 13:26:49 claudio 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 (32 * 1024) /* max cluster allocation */ /* 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_ */
