Arm port, NetBSD codebase stripped down, 32bit only support.

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_ */