From dd7ee147db24eaaa37f333fa93ce31efe949d9bf Mon Sep 17 00:00:00 2001
From: Jeff Johnston <jjohnstn@redhat.com>
Date: Thu, 7 Nov 2002 19:27:36 +0000
Subject: 2002-11-07  Joel Sherrill <joel@OARcorp.com>

        * libc/sys/rtems/machine: New directory.
        * libc/sys/rtems/machine/limits.h, libc/sys/rtems/machine/param.h,
        libc/sys/rtems/sys/param.h, libc/sys/rtems/sys/syslimits.h,
        libc/sys/rtems/sys/utime.h: New files added to make *-rtems newlib
        targets more BSD like when installed without requiring files to
        be overwritten at install point when RTEMS itself is installed.
        * Makefile.am: Pick up system dependent machine .h files such as
        might be found on a BSD-ish system.
        * Makefile.in: Regenerate.
        * libc/include/machine/types.h: When on an RTEMS target, define a
        few BSD flavor types.
---
 newlib/libc/sys/rtems/machine/param.h | 92 +++++++++++++++++++++++++++++++++++
 1 file changed, 92 insertions(+)
 create mode 100644 newlib/libc/sys/rtems/machine/param.h

(limited to 'newlib/libc/sys/rtems/machine/param.h')

diff --git a/newlib/libc/sys/rtems/machine/param.h b/newlib/libc/sys/rtems/machine/param.h
new file mode 100644
index 000000000..4168f1f6c
--- /dev/null
+++ b/newlib/libc/sys/rtems/machine/param.h
@@ -0,0 +1,92 @@
+/*
+ *  $Id$
+ */
+
+#ifndef _MACHINE_PARAM_H_
+#define	_MACHINE_PARAM_H_
+
+/*
+ * These aren't really machine-dependent for RTEMS.....
+ */
+
+/*
+#define MACHINE		"i386"
+#define MID_MACHINE	MID_I386
+*/
+
+/*
+ * Round p (pointer or byte index) up to a correctly-aligned value
+ * for all data types (int, long, ...).   The result is unsigned int
+ * and must be cast to any desired pointer type.
+ */
+#define ALIGNBYTES	(sizeof(int) - 1)
+#define ALIGN(p)	(((unsigned)(p) + ALIGNBYTES) & ~ALIGNBYTES)
+
+#define PAGE_SHIFT	12		/* LOG2(PAGE_SIZE) */
+#define PAGE_SIZE	(1<<PAGE_SHIFT)	/* bytes/page */
+#define PAGE_MASK	(PAGE_SIZE-1)
+#define NPTEPG		(PAGE_SIZE/(sizeof (pt_entry_t)))
+
+#define NPDEPG		(PAGE_SIZE/(sizeof (pd_entry_t)))
+#define PDRSHIFT	22		/* LOG2(NBPDR) */
+#define NBPDR		(1<<PDRSHIFT)	/* bytes/page dir */
+
+#define DEV_BSHIFT	9		/* log2(DEV_BSIZE) */
+#define DEV_BSIZE	(1<<DEV_BSHIFT)
+
+#define BLKDEV_IOSIZE	2048
+#define MAXPHYS		(64 * 1024)	/* max raw I/O transfer size */
+
+#define UPAGES	2		/* pages of u-area */
+
+/*
+ * Constants related to network buffer management.
+ * MCLBYTES must be no larger than CLBYTES (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.
+ */
+#ifndef	MSIZE
+#define MSIZE		128		/* size of an mbuf */
+#endif	/* MSIZE */
+
+#ifndef	MCLSHIFT
+#define MCLSHIFT	11		/* convert bytes to m_buf clusters */
+#endif	/* MCLSHIFT */
+#define MCLBYTES	(1 << MCLSHIFT)	/* size of an m_buf cluster */
+#define MCLOFSET	(MCLBYTES - 1)	/* offset within an m_buf cluster */
+
+/*
+ * Some macros for units conversion
+ */
+
+/* clicks to bytes */
+#define ctob(x)	((x)<<PAGE_SHIFT)
+
+/* bytes to clicks */
+#define btoc(x)	(((unsigned)(x)+PAGE_MASK)>>PAGE_SHIFT)
+
+/*
+ * btodb() is messy and perhaps slow because `bytes' may be an off_t.  We
+ * want to shift an unsigned type to avoid sign extension and we don't
+ * want to widen `bytes' unnecessarily.  Assume that the result fits in
+ * a daddr_t.
+ */
+#define btodb(bytes)	 		/* calculates (bytes / DEV_BSIZE) */ \
+	(sizeof (bytes) > sizeof(long) \
+	 ? (daddr_t)((unsigned long long)(bytes) >> DEV_BSHIFT) \
+	 : (daddr_t)((unsigned long)(bytes) >> DEV_BSHIFT))
+
+#define dbtob(db)			/* calculates (db * DEV_BSIZE) */ \
+	((off_t)(db) << DEV_BSHIFT)
+
+/*
+ * Mach derived conversion macros
+ */
+#define trunc_page(x)		((unsigned)(x) & ~PAGE_MASK)
+#define round_page(x)		((((unsigned)(x)) + PAGE_MASK) & ~PAGE_MASK)
+
+#define atop(x)			((unsigned)(x) >> PAGE_SHIFT)
+#define ptoa(x)			((unsigned)(x) << PAGE_SHIFT)
+
+#endif /* !_MACHINE_PARAM_H_ */
-- 
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