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Diffstat (limited to 'sys/arch/arm/include/param.h')
| -rw-r--r-- | sys/arch/arm/include/param.h | 241 |
1 files changed, 241 insertions, 0 deletions
diff --git a/sys/arch/arm/include/param.h b/sys/arch/arm/include/param.h new file mode 100644 index 00000000000..72926990653 --- /dev/null +++ b/sys/arch/arm/include/param.h @@ -0,0 +1,241 @@ +/* $OpenBSD: param.h,v 1.1 2004/02/01 05:09:49 drahn Exp $ */ +/* $NetBSD: param.h,v 1.9 2002/03/24 03:37:23 thorpej 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_ARM_PARAM_H_ +#define _ARM_ARM_PARAM_H_ + + +/* + * Machine dependent constants for ARM6+ processors + */ +/* These are defined in the Port File before it includes + * this file. */ + +#define PAGE_SHIFT 12 /* LOG2(NBPG) */ +#define PGSHIFT 12 /* LOG2(NBPG) */ +#define PAGE_SIZE (1 << PAGE_SHIFT) /* bytes/page */ +#define NBPG (1 << PAGE_SHIFT) /* bytes/page */ +#define PAGE_MASK (PAGE_SIZE - 1) +#define PGOFSET (PAGE_SIZE - 1) +#define NPTEPG (PAGE_SIZE/(sizeof (pt_entry_t))) + +#define SSIZE 1 /* initial stack size/NBPG */ +#define SINCR 1 /* increment of stack/NBPG */ +#define UPAGES 2 /* pages of u-area */ +#define USPACE (UPAGES * PAGE_SIZE) /* total size of u-area */ + +#ifndef MSGBUFSIZE +#define MSGBUFSIZE PAGE_SIZE /* default message buffer size */ +#endif + +#ifndef NMBCLUSTERS +#ifdef GATEWAY +#define NMBCLUSTERS 2048 /* map size, max cluster allocation */ +#else +#define NMBCLUSTERS 1024 /* map size, max cluster allocation */ +#endif +#endif + +/* + * Minimum and maximum sizes of the kernel malloc arena in PAGE_SIZE-sized + * logical pages. + */ +#define NKMEMPAGES_MIN_DEFAULT ((6 * 1024 * 1024) >> PAGE_SHIFT) +#define NKMEMPAGES_MAX_DEFAULT ((7 * 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 + * 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_btop(x) ((x) >> PAGE_SHIFT) +#define arm_ptob(x) ((x) << PAGE_SHIFT) +#define arm_trunc_page(x) ((unsigned)(x) & ~PAGE_MASK) + +#ifdef _KERNEL +#ifndef _LOCORE +void delay __P((unsigned)); +#define DELAY(x) delay(x) +#endif +#endif + +/* + * 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) +#ifndef MACHINE_ARCH /* XXX For now */ +#ifndef __ARMEB__ +#define _MACHINE_ARCH arm +#define MACHINE_ARCH "arm" +#else +#define _MACHINE_ARCH armeb +#define MACHINE_ARCH "armeb" +#endif /* __ARMEB__ */ +#endif /* MACHINE_ARCH */ +#elif defined(__ELF__) +#undef _MACHINE +#undef MACHINE +#undef _MACHINE_ARCH +#undef MACHINE_ARCH +#define _MACHINE arm +#define MACHINE "arm" +#ifndef __ARMEB__ +#define _MACHINE_ARCH arm +#define MACHINE_ARCH "arm" +#else +#define _MACHINE_ARCH armeb +#define MACHINE_ARCH "armeb" +#endif /* __ARMEB__ */ +#endif /* __ELF__ */ + +#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. + * + * 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 + +/* pages ("clicks") to disk blocks */ +#define ctod(x) ((x) << (PAGE_SHIFT - DEV_BSHIFT)) +#define dtoc(x) ((x) >> (PAGE_SHIFT - DEV_BSHIFT)) +/*#define dtob(x) ((x) << DEV_BSHIFT)*/ + +#define ctob(x) ((x) << PAGE_SHIFT) + +/* bytes to pages */ +#define btoc(x) (((x) + PAGE_MASK) >> PAGE_SHIFT) + +#define btodb(bytes) /* calculates (bytes / DEV_BSIZE) */ \ + ((bytes) >> DEV_BSHIFT) +#define dbtob(db) /* calculates (db * DEV_BSIZE) */ \ + ((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)) + +/* + * 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 */ + +#define ovbcopy bcopy + +#ifdef _KERNEL +#ifdef _LOCORE +#include <machine/psl.h> +#else +#include <sys/param.h> +#include <machine/cpu.h> +#endif +#endif + +#endif /* _ARM_ARM_PARAM_H_ */ |