Import of CMU's RAIDframe via NetBSD.

1 files changed, 231 insertions, 0 deletions

diff --git a/sys/dev/raidframe/rf_utils.c b/sys/dev/raidframe/rf_utils.c
new file mode 100644
index 00000000000..be379ed8e58
--- /dev/null
+++ b/sys/dev/raidframe/rf_utils.c
@@ -0,0 +1,231 @@
+/*	$OpenBSD: rf_utils.c,v 1.1 1999/01/11 14:29:54 niklas Exp $	*/
+/*	$NetBSD: rf_utils.c,v 1.1 1998/11/13 04:20:35 oster Exp $	*/
+/*
+ * Copyright (c) 1995 Carnegie-Mellon University.
+ * All rights reserved.
+ *
+ * Author: Mark Holland
+ *
+ * Permission to use, copy, modify and distribute this software and
+ * its documentation is hereby granted, provided that both the copyright
+ * notice and this permission notice appear in all copies of the
+ * software, derivative works or modified versions, and any portions
+ * thereof, and that both notices appear in supporting documentation.
+ *
+ * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
+ * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
+ * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
+ *
+ * Carnegie Mellon requests users of this software to return to
+ *
+ *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
+ *  School of Computer Science
+ *  Carnegie Mellon University
+ *  Pittsburgh PA 15213-3890
+ *
+ * any improvements or extensions that they make and grant Carnegie the
+ * rights to redistribute these changes.
+ */
+
+/****************************************
+ *
+ * rf_utils.c -- various support routines
+ *
+ ****************************************/
+
+/* :  
+ * Log: rf_utils.c,v 
+ * Revision 1.20  1996/07/27 23:36:08  jimz
+ * Solaris port of simulator
+ *
+ * Revision 1.19  1996/07/22  19:52:16  jimz
+ * switched node params to RF_DagParam_t, a union of
+ * a 64-bit int and a void *, for better portability
+ * attempted hpux port, but failed partway through for
+ * lack of a single C compiler capable of compiling all
+ * source files
+ *
+ * Revision 1.18  1996/07/15  17:22:18  jimz
+ * nit-pick code cleanup
+ * resolve stdlib problems on DEC OSF
+ *
+ * Revision 1.17  1996/06/09  02:36:46  jimz
+ * lots of little crufty cleanup- fixup whitespace
+ * issues, comment #ifdefs, improve typing in some
+ * places (esp size-related)
+ *
+ * Revision 1.16  1996/06/07  21:33:04  jimz
+ * begin using consistent types for sector numbers,
+ * stripe numbers, row+col numbers, recon unit numbers
+ *
+ * Revision 1.15  1996/06/03  23:28:26  jimz
+ * more bugfixes
+ * check in tree to sync for IPDS runs with current bugfixes
+ * there still may be a problem with threads in the script test
+ * getting I/Os stuck- not trivially reproducible (runs ~50 times
+ * in a row without getting stuck)
+ *
+ * Revision 1.14  1996/06/02  17:31:48  jimz
+ * Moved a lot of global stuff into array structure, where it belongs.
+ * Fixed up paritylogging, pss modules in this manner. Some general
+ * code cleanup. Removed lots of dead code, some dead files.
+ *
+ * Revision 1.13  1996/05/27  18:56:37  jimz
+ * more code cleanup
+ * better typing
+ * compiles in all 3 environments
+ *
+ * Revision 1.12  1996/05/23  21:46:35  jimz
+ * checkpoint in code cleanup (release prep)
+ * lots of types, function names have been fixed
+ *
+ * Revision 1.11  1996/05/18  19:51:34  jimz
+ * major code cleanup- fix syntax, make some types consistent,
+ * add prototypes, clean out dead code, et cetera
+ *
+ * Revision 1.10  1995/12/06  15:17:44  root
+ * added copyright info
+ *
+ */
+
+#include "rf_threadstuff.h"
+
+#ifdef _KERNEL
+#define KERNEL
+#endif
+
+#ifndef KERNEL
+#include <stdio.h>
+#endif /* !KERNEL */
+#include <sys/time.h>
+
+#include "rf_threadid.h"
+#include "rf_utils.h"
+#include "rf_debugMem.h"
+#include "rf_alloclist.h"
+#include "rf_general.h"
+#include "rf_sys.h"
+
+#ifndef KERNEL
+#include "rf_randmacros.h"
+#endif /* !KERNEL */
+
+/* creates & zeros 2-d array with b rows and k columns (MCH) */
+RF_RowCol_t **rf_make_2d_array(b, k, allocList)
+  int                  b;
+  int                  k;
+  RF_AllocListElem_t  *allocList;
+{
+    RF_RowCol_t **retval, i;
+
+    RF_MallocAndAdd(retval, b * sizeof(RF_RowCol_t *), (RF_RowCol_t **), allocList);
+    for (i=0; i<b; i++) {
+      RF_MallocAndAdd(retval[i], k * sizeof(RF_RowCol_t), (RF_RowCol_t *), allocList);
+      (void) bzero((char *) retval[i], k*sizeof(RF_RowCol_t));
+    }
+    return(retval);
+}
+
+void rf_free_2d_array(a, b, k)
+  RF_RowCol_t  **a;
+  int            b;
+  int            k;
+{
+  RF_RowCol_t i;
+
+  for (i=0; i<b; i++)
+    RF_Free(a[i], k*sizeof(RF_RowCol_t));
+  RF_Free(a, b*sizeof(RF_RowCol_t));
+}
+
+
+/* creates & zeros a 1-d array with c columns */
+RF_RowCol_t *rf_make_1d_array(c, allocList)
+  int                  c;
+  RF_AllocListElem_t  *allocList;
+{
+  RF_RowCol_t *retval;
+
+  RF_MallocAndAdd(retval, c * sizeof(RF_RowCol_t), (RF_RowCol_t *), allocList);
+  (void) bzero((char *) retval, c*sizeof(RF_RowCol_t));
+  return(retval);
+}
+
+void rf_free_1d_array(a, n)
+  RF_RowCol_t  *a;
+  int           n;
+{
+  RF_Free(a, n * sizeof(RF_RowCol_t));
+}
+
+/* Euclid's algorithm:  finds and returns the greatest common divisor
+ * between a and b.     (MCH)
+ */
+int rf_gcd(m, n)
+  int  m;
+  int  n;
+{
+    int t;
+
+    while (m>0) {
+        t = n % m;
+        n = m;
+        m = t;
+    }
+    return(n);
+}
+
+#if !defined(KERNEL) && !defined(SIMULATE) && defined(__osf__)
+/* this is used to generate a random number when _FASTRANDOM is off
+ * in randmacros.h
+ */
+long rf_do_random(rval, rdata)
+  long                *rval;
+  struct random_data  *rdata;
+{
+  int a, b;
+  long c;
+  /*
+   * random_r() generates random 32-bit values. OR them together.
+   */
+  if (random_r(&a, rdata)!=0) {
+    fprintf(stderr,"Yikes!  call to random_r failed\n");
+    exit(1);
+  }
+  if (random_r(&b, rdata)!=0) {
+    fprintf(stderr,"Yikes!  call to random_r failed\n");
+    exit(1);
+  }
+  c = ((long)a)<<32;
+  *rval = c|b;
+  return(*rval);
+}
+#endif /* !KERNEL && !SIMULATE && __osf__ */
+
+/* these convert between text and integer.  Apparently the regular C macros
+ * for doing this are not available in the kernel
+ */
+
+#define ISDIGIT(x)   ( (x) >= '0' && (x) <= '9' )
+#define ISHEXCHAR(x) ( ((x) >= 'a' && (x) <= 'f') || ((x) >= 'A' && (x) <= 'F') )
+#define ISHEX(x)     ( ISDIGIT(x) || ISHEXCHAR(x) )
+#define HC2INT(x)    ( ((x) >= 'a' && (x) <= 'f') ? (x) - 'a' + 10 :                    \
+		       ( ((x) >= 'A' && (x) <= 'F') ? (x) - 'A' + 10 : (x - '0') ) )
+
+int rf_atoi(p)
+ char  *p;
+{
+  int val = 0, negate = 0;
+  
+  if (*p == '-') {negate=1; p++;}
+  for ( ; ISDIGIT(*p); p++) val = 10 * val + (*p - '0');
+  return((negate) ? -val : val);
+}
+
+int rf_htoi(p)
+  char  *p;
+{
+  int val = 0;
+  for ( ; ISHEXCHAR(*p); p++) val = 16 * val + HC2INT(*p);
+  return(val);
+}