mips: Add multi-processor support for r5900. Others might work.

common, igen: Fix MP related bugs.

6 files changed, 460 insertions, 324 deletions

diff --git a/sim/mips/ChangeLog b/sim/mips/ChangeLog
index 05d8d10..c7205d6 100644
--- a/sim/mips/ChangeLog
+++ b/sim/mips/ChangeLog
@@ -1,3 +1,49 @@
+Sun Feb  1 11:15:29 1998  Andrew Cagney  <cagney@b1.cygnus.com>
+
+	* sim-main.h (sim_state): Make the cpu array MAX_NR_PROCESSORS in
+ 	size.
+
+	* interp.c (SD, CPU): Define.
+	(mips_option_handler): Set flags in each CPU.
+	(interrupt_event): Assume CPU 0 is the one being iterrupted.
+	(sim_close): Do not clear STATE, deleted anyway.
+	(sim_write, sim_read): Assume CPU zero's vm should be used for
+ 	data transfers.
+	(sim_create_inferior): Set the PC for all processors.
+	(sim_monitor, store_word, load_word, mips16_entry): Add cpu
+ 	argument.
+	(mips16_entry): Pass correct nr of args to store_word, load_word.
+	(ColdReset): Cold reset all cpu's.
+	(signal_exception): Pass cpu to sim_monitor & mips16_entry.
+	(sim_monitor, load_memory, store_memory, signal_exception): Use
+ 	`CPU' instead of STATE_CPU.
+
+
+	* sim-main.h: Replace uses of STATE_CPU with CPU. Replace sd with
+ 	SD or CPU_.
+	
+	* sim-main.h (signal_exception): Add sim_cpu arg.
+	(SignalException*): Pass both SD and CPU to signal_exception.
+	* interp.c (signal_exception): Update.
+	
+	* sim-main.h (value_fpr, store_fpr, dotrace, ifetch32), interp.c:
+ 	Ditto
+	(sync_operation, prefetch, cache_op, store_memory, load_memory,
+ 	address_translation): Ditto
+	(decode_coproc, cop_lw, cop_ld, cop_sw, cop_sd): Ditto.
+	
+start-sanitize-vr5400
+	* mdmx.igen (get_scale): Pass CPU_ to semantic_illegal instead of
+ 	`sd'.
+	(ByteAlign): Use StoreFPR, pass args in correct order.
+	
+end-sanitize-vr5400
+start-sanitize-r5900
+Sun Feb  1 10:59:55 1998  Andrew Cagney  <cagney@b1.cygnus.com>
+
+	* configure.in (sim_igen_filter): For r5900, configure as SMP.
+
+end-sanitize-r5900
 Sat Jan 31 18:15:41 1998  Andrew Cagney  <cagney@b1.cygnus.com>
 
 	* configure: Regenerated to track ../common/aclocal.m4 changes.
diff --git a/sim/mips/configure b/sim/mips/configure
index a150a53..0eca742 100755
--- a/sim/mips/configure
+++ b/sim/mips/configure
@@ -115,6 +115,8 @@ ac_help="$ac_help
 ac_help="$ac_help
   --enable-sim-float			Specify that the target processor has floating point hardware."
 ac_help="$ac_help
+  --enable-sim-smp=n			Specify number of processors to configure for (default ${default_sim_smp})."
+ac_help="$ac_help
   --enable-sim-igen=opts		Enable IGEN simulator"
 
 # Initialize some variables set by options.
@@ -625,7 +627,7 @@ fi
 
 
 echo $ac_n "checking how to run the C preprocessor""... $ac_c" 1>&6
-echo "configure:629: checking how to run the C preprocessor" >&5
+echo "configure:631: checking how to run the C preprocessor" >&5
 # On Suns, sometimes $CPP names a directory.
 if test -n "$CPP" && test -d "$CPP"; then
   CPP=
@@ -640,13 +642,13 @@ else
   # On the NeXT, cc -E runs the code through the compiler's parser,
   # not just through cpp.
   cat > conftest.$ac_ext <<EOF
-#line 644 "configure"
+#line 646 "configure"
 #include "confdefs.h"
 #include <assert.h>
 Syntax Error
 EOF
 ac_try="$ac_cpp conftest.$ac_ext >/dev/null 2>conftest.out"
-{ (eval echo configure:650: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
+{ (eval echo configure:652: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
 ac_err=`grep -v '^ *+' conftest.out`
 if test -z "$ac_err"; then
   :
@@ -657,13 +659,13 @@ else
   rm -rf conftest*
   CPP="${CC-cc} -E -traditional-cpp"
   cat > conftest.$ac_ext <<EOF
-#line 661 "configure"
+#line 663 "configure"
 #include "confdefs.h"
 #include <assert.h>
 Syntax Error
 EOF
 ac_try="$ac_cpp conftest.$ac_ext >/dev/null 2>conftest.out"
-{ (eval echo configure:667: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
+{ (eval echo configure:669: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
 ac_err=`grep -v '^ *+' conftest.out`
 if test -z "$ac_err"; then
   :
@@ -736,7 +738,7 @@ else { echo "configure: error: can not run $ac_config_sub" 1>&2; exit 1; }
 fi
 
 echo $ac_n "checking host system type""... $ac_c" 1>&6
-echo "configure:740: checking host system type" >&5
+echo "configure:742: checking host system type" >&5
 
 host_alias=$host
 case "$host_alias" in
@@ -757,7 +759,7 @@ host_os=`echo $host | sed 's/^\([^-]*\)-\([^-]*\)-\(.*\)$/\3/'`
 echo "$ac_t""$host" 1>&6
 
 echo $ac_n "checking target system type""... $ac_c" 1>&6
-echo "configure:761: checking target system type" >&5
+echo "configure:763: checking target system type" >&5
 
 target_alias=$target
 case "$target_alias" in
@@ -775,7 +777,7 @@ target_os=`echo $target | sed 's/^\([^-]*\)-\([^-]*\)-\(.*\)$/\3/'`
 echo "$ac_t""$target" 1>&6
 
 echo $ac_n "checking build system type""... $ac_c" 1>&6
-echo "configure:779: checking build system type" >&5
+echo "configure:781: checking build system type" >&5
 
 build_alias=$build
 case "$build_alias" in
@@ -819,7 +821,7 @@ test "$program_transform_name" = "" && program_transform_name="s,x,x,"
 # Extract the first word of "gcc", so it can be a program name with args.
 set dummy gcc; ac_word=$2
 echo $ac_n "checking for $ac_word""... $ac_c" 1>&6
-echo "configure:823: checking for $ac_word" >&5
+echo "configure:825: checking for $ac_word" >&5
 if eval "test \"`echo '$''{'ac_cv_prog_CC'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -848,7 +850,7 @@ if test -z "$CC"; then
   # Extract the first word of "cc", so it can be a program name with args.
 set dummy cc; ac_word=$2
 echo $ac_n "checking for $ac_word""... $ac_c" 1>&6
-echo "configure:852: checking for $ac_word" >&5
+echo "configure:854: checking for $ac_word" >&5
 if eval "test \"`echo '$''{'ac_cv_prog_CC'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -896,7 +898,7 @@ fi
 fi
 
 echo $ac_n "checking whether the C compiler ($CC $CFLAGS $LDFLAGS) works""... $ac_c" 1>&6
-echo "configure:900: checking whether the C compiler ($CC $CFLAGS $LDFLAGS) works" >&5
+echo "configure:902: checking whether the C compiler ($CC $CFLAGS $LDFLAGS) works" >&5
 
 ac_ext=c
 # CFLAGS is not in ac_cpp because -g, -O, etc. are not valid cpp options.
@@ -906,11 +908,11 @@ ac_link='${CC-cc} -o conftest $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS
 cross_compiling=$ac_cv_prog_cc_cross
 
 cat > conftest.$ac_ext <<EOF
-#line 910 "configure"
+#line 912 "configure"
 #include "confdefs.h"
 main(){return(0);}
 EOF
-if { (eval echo configure:914: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest; then
+if { (eval echo configure:916: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest; then
   ac_cv_prog_cc_works=yes
   # If we can't run a trivial program, we are probably using a cross compiler.
   if (./conftest; exit) 2>/dev/null; then
@@ -930,12 +932,12 @@ if test $ac_cv_prog_cc_works = no; then
   { echo "configure: error: installation or configuration problem: C compiler cannot create executables." 1>&2; exit 1; }
 fi
 echo $ac_n "checking whether the C compiler ($CC $CFLAGS $LDFLAGS) is a cross-compiler""... $ac_c" 1>&6
-echo "configure:934: checking whether the C compiler ($CC $CFLAGS $LDFLAGS) is a cross-compiler" >&5
+echo "configure:936: checking whether the C compiler ($CC $CFLAGS $LDFLAGS) is a cross-compiler" >&5
 echo "$ac_t""$ac_cv_prog_cc_cross" 1>&6
 cross_compiling=$ac_cv_prog_cc_cross
 
 echo $ac_n "checking whether we are using GNU C""... $ac_c" 1>&6
-echo "configure:939: checking whether we are using GNU C" >&5
+echo "configure:941: checking whether we are using GNU C" >&5
 if eval "test \"`echo '$''{'ac_cv_prog_gcc'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -944,7 +946,7 @@ else
   yes;
 #endif
 EOF
-if { ac_try='${CC-cc} -E conftest.c'; { (eval echo configure:948: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }; } | egrep yes >/dev/null 2>&1; then
+if { ac_try='${CC-cc} -E conftest.c'; { (eval echo configure:950: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }; } | egrep yes >/dev/null 2>&1; then
   ac_cv_prog_gcc=yes
 else
   ac_cv_prog_gcc=no
@@ -959,7 +961,7 @@ if test $ac_cv_prog_gcc = yes; then
   ac_save_CFLAGS="$CFLAGS"
   CFLAGS=
   echo $ac_n "checking whether ${CC-cc} accepts -g""... $ac_c" 1>&6
-echo "configure:963: checking whether ${CC-cc} accepts -g" >&5
+echo "configure:965: checking whether ${CC-cc} accepts -g" >&5
 if eval "test \"`echo '$''{'ac_cv_prog_cc_g'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -997,7 +999,7 @@ fi
 # SVR4 /usr/ucb/install, which tries to use the nonexistent group "staff"
 # ./install, which can be erroneously created by make from ./install.sh.
 echo $ac_n "checking for a BSD compatible install""... $ac_c" 1>&6
-echo "configure:1001: checking for a BSD compatible install" >&5
+echo "configure:1003: checking for a BSD compatible install" >&5
 if test -z "$INSTALL"; then
 if eval "test \"`echo '$''{'ac_cv_path_install'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
@@ -1062,7 +1064,7 @@ AR=${AR-ar}
 # Extract the first word of "ranlib", so it can be a program name with args.
 set dummy ranlib; ac_word=$2
 echo $ac_n "checking for $ac_word""... $ac_c" 1>&6
-echo "configure:1066: checking for $ac_word" >&5
+echo "configure:1068: checking for $ac_word" >&5
 if eval "test \"`echo '$''{'ac_cv_prog_RANLIB'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -1096,17 +1098,17 @@ for ac_hdr in stdlib.h string.h strings.h unistd.h time.h sys/time.h sys/resourc
 do
 ac_safe=`echo "$ac_hdr" | sed 'y%./+-%__p_%'`
 echo $ac_n "checking for $ac_hdr""... $ac_c" 1>&6
-echo "configure:1100: checking for $ac_hdr" >&5
+echo "configure:1102: checking for $ac_hdr" >&5
 if eval "test \"`echo '$''{'ac_cv_header_$ac_safe'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 1105 "configure"
+#line 1107 "configure"
 #include "confdefs.h"
 #include <$ac_hdr>
 EOF
 ac_try="$ac_cpp conftest.$ac_ext >/dev/null 2>conftest.out"
-{ (eval echo configure:1110: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
+{ (eval echo configure:1112: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
 ac_err=`grep -v '^ *+' conftest.out`
 if test -z "$ac_err"; then
   rm -rf conftest*
@@ -1135,12 +1137,12 @@ done
 for ac_func in getrusage time sigaction
 do
 echo $ac_n "checking for $ac_func""... $ac_c" 1>&6
-echo "configure:1139: checking for $ac_func" >&5
+echo "configure:1141: checking for $ac_func" >&5
 if eval "test \"`echo '$''{'ac_cv_func_$ac_func'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 1144 "configure"
+#line 1146 "configure"
 #include "confdefs.h"
 /* System header to define __stub macros and hopefully few prototypes,
     which can conflict with char $ac_func(); below.  */
@@ -1163,7 +1165,7 @@ $ac_func();
 
 ; return 0; }
 EOF
-if { (eval echo configure:1167: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest; then
+if { (eval echo configure:1169: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest; then
   rm -rf conftest*
   eval "ac_cv_func_$ac_func=yes"
 else
@@ -1335,12 +1337,12 @@ fi
 
 
 echo $ac_n "checking return type of signal handlers""... $ac_c" 1>&6
-echo "configure:1339: checking return type of signal handlers" >&5
+echo "configure:1341: checking return type of signal handlers" >&5
 if eval "test \"`echo '$''{'ac_cv_type_signal'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 1344 "configure"
+#line 1346 "configure"
 #include "confdefs.h"
 #include <sys/types.h>
 #include <signal.h>
@@ -1357,7 +1359,7 @@ int main() {
 int i;
 ; return 0; }
 EOF
-if { (eval echo configure:1361: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+if { (eval echo configure:1363: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
   rm -rf conftest*
   ac_cv_type_signal=void
 else
@@ -1501,14 +1503,14 @@ else
   
 if test "x$cross_compiling" = "xno"; then
   echo $ac_n "checking whether byte ordering is bigendian""... $ac_c" 1>&6
-echo "configure:1505: checking whether byte ordering is bigendian" >&5
+echo "configure:1507: checking whether byte ordering is bigendian" >&5
 if eval "test \"`echo '$''{'ac_cv_c_bigendian'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   ac_cv_c_bigendian=unknown
 # See if sys/param.h defines the BYTE_ORDER macro.
 cat > conftest.$ac_ext <<EOF
-#line 1512 "configure"
+#line 1514 "configure"
 #include "confdefs.h"
 #include <sys/types.h>
 #include <sys/param.h>
@@ -1519,11 +1521,11 @@ int main() {
 #endif
 ; return 0; }
 EOF
-if { (eval echo configure:1523: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+if { (eval echo configure:1525: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
   rm -rf conftest*
   # It does; now see whether it defined to BIG_ENDIAN or not.
 cat > conftest.$ac_ext <<EOF
-#line 1527 "configure"
+#line 1529 "configure"
 #include "confdefs.h"
 #include <sys/types.h>
 #include <sys/param.h>
@@ -1534,7 +1536,7 @@ int main() {
 #endif
 ; return 0; }
 EOF
-if { (eval echo configure:1538: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+if { (eval echo configure:1540: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
   rm -rf conftest*
   ac_cv_c_bigendian=yes
 else
@@ -1554,7 +1556,7 @@ if test "$cross_compiling" = yes; then
     { echo "configure: error: can not run test program while cross compiling" 1>&2; exit 1; }
 else
   cat > conftest.$ac_ext <<EOF
-#line 1558 "configure"
+#line 1560 "configure"
 #include "confdefs.h"
 main () {
   /* Are we little or big endian?  From Harbison&Steele.  */
@@ -1567,7 +1569,7 @@ main () {
   exit (u.c[sizeof (long) - 1] == 1);
 }
 EOF
-if { (eval echo configure:1571: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest && (./conftest; exit) 2>/dev/null
+if { (eval echo configure:1573: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest && (./conftest; exit) 2>/dev/null
 then
   ac_cv_c_bigendian=no
 else
@@ -1823,6 +1825,37 @@ fi
 
 
 #
+# Select the level of SMP support
+#
+case "${target}" in
+# start-sanitize-r5900
+  mips64r59*-*-*)       mips_smp=1 ;;
+# end-sanitize-r5900
+  *)                    mips_smp=0 ;;
+esac
+
+default_sim_smp="$mips_smp"
+# Check whether --enable-sim-smp or --disable-sim-smp was given.
+if test "${enable_sim_smp+set}" = set; then
+  enableval="$enable_sim_smp"
+  case "${enableval}" in
+  yes)	sim_smp="-DWITH_SMP=5" ; sim_igen_smp="-N 5";;
+  no)	sim_smp="-DWITH_SMP=0" ; sim_igen_smp="-N 0";;
+  *)	sim_smp="-DWITH_SMP=$enableval" ; sim_igen_smp="-N $enableval";;
+esac
+if test x"$silent" != x"yes" && test x"$sim_smp" != x""; then
+  echo "Setting smp flags = $sim_smp" 6>&1
+fi
+else
+  sim_smp="-DWITH_SMP=${default_sim_smp}" ; sim_igen_smp="-N ${default_sim_smp}"
+if test x"$silent" != x"yes"; then
+  echo "Setting smp flags = $sim_smp" 6>&1
+fi
+fi
+
+
+
+#
 # Select the IGEN architecture
 #
 sim_use_gen=NO
@@ -1867,8 +1900,8 @@ case "${target}" in
   *)                    sim_default_gen=IGEN
 			;;
 esac
-sim_igen_flags="-F ${sim_igen_filter} ${sim_igen_machine}"
-sim_m16_flags=" -F ${sim_m16_filter}  ${sim_m16_machine}"
+sim_igen_flags="-F ${sim_igen_filter} ${sim_igen_machine} ${sim_igen_smp}"
+sim_m16_flags=" -F ${sim_m16_filter}  ${sim_m16_machine}  ${sim_igen_smp}"
 
 
 
@@ -1898,17 +1931,17 @@ for ac_hdr in string.h strings.h stdlib.h stdlib.h
 do
 ac_safe=`echo "$ac_hdr" | sed 'y%./+-%__p_%'`
 echo $ac_n "checking for $ac_hdr""... $ac_c" 1>&6
-echo "configure:1902: checking for $ac_hdr" >&5
+echo "configure:1935: checking for $ac_hdr" >&5
 if eval "test \"`echo '$''{'ac_cv_header_$ac_safe'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 1907 "configure"
+#line 1940 "configure"
 #include "confdefs.h"
 #include <$ac_hdr>
 EOF
 ac_try="$ac_cpp conftest.$ac_ext >/dev/null 2>conftest.out"
-{ (eval echo configure:1912: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
+{ (eval echo configure:1945: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
 ac_err=`grep -v '^ *+' conftest.out`
 if test -z "$ac_err"; then
   rm -rf conftest*
@@ -1935,7 +1968,7 @@ fi
 done
 
 echo $ac_n "checking for fabs in -lm""... $ac_c" 1>&6
-echo "configure:1939: checking for fabs in -lm" >&5
+echo "configure:1972: checking for fabs in -lm" >&5
 ac_lib_var=`echo m'_'fabs | sed 'y%./+-%__p_%'`
 if eval "test \"`echo '$''{'ac_cv_lib_$ac_lib_var'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
@@ -1943,7 +1976,7 @@ else
   ac_save_LIBS="$LIBS"
 LIBS="-lm  $LIBS"
 cat > conftest.$ac_ext <<EOF
-#line 1947 "configure"
+#line 1980 "configure"
 #include "confdefs.h"
 /* Override any gcc2 internal prototype to avoid an error.  */
 /* We use char because int might match the return type of a gcc2
@@ -1954,7 +1987,7 @@ int main() {
 fabs()
 ; return 0; }
 EOF
-if { (eval echo configure:1958: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest; then
+if { (eval echo configure:1991: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest; then
   rm -rf conftest*
   eval "ac_cv_lib_$ac_lib_var=yes"
 else
@@ -1984,12 +2017,12 @@ fi
 for ac_func in aint anint sqrt
 do
 echo $ac_n "checking for $ac_func""... $ac_c" 1>&6
-echo "configure:1988: checking for $ac_func" >&5
+echo "configure:2021: checking for $ac_func" >&5
 if eval "test \"`echo '$''{'ac_cv_func_$ac_func'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 1993 "configure"
+#line 2026 "configure"
 #include "confdefs.h"
 /* System header to define __stub macros and hopefully few prototypes,
     which can conflict with char $ac_func(); below.  */
@@ -2012,7 +2045,7 @@ $ac_func();
 
 ; return 0; }
 EOF
-if { (eval echo configure:2016: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest; then
+if { (eval echo configure:2049: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest; then
   rm -rf conftest*
   eval "ac_cv_func_$ac_func=yes"
 else
diff --git a/sim/mips/configure.in b/sim/mips/configure.in
index 710dbe7..9ebf0b4 100644
--- a/sim/mips/configure.in
+++ b/sim/mips/configure.in
@@ -97,6 +97,18 @@ SIM_AC_OPTION_FLOAT($mips_fpu)
 
 
 #
+# Select the level of SMP support
+#
+case "${target}" in
+# start-sanitize-r5900
+  mips64r59*-*-*)       mips_smp=1 ;;
+# end-sanitize-r5900
+  *)                    mips_smp=0 ;;
+esac
+SIM_AC_OPTION_SMP($mips_smp)
+
+
+#
 # Select the IGEN architecture
 #
 sim_use_gen=NO
@@ -141,8 +153,8 @@ case "${target}" in
   *)                    sim_default_gen=IGEN
 			;;
 esac
-sim_igen_flags="-F ${sim_igen_filter} ${sim_igen_machine}"
-sim_m16_flags=" -F ${sim_m16_filter}  ${sim_m16_machine}"
+sim_igen_flags="-F ${sim_igen_filter} ${sim_igen_machine} ${sim_igen_smp}"
+sim_m16_flags=" -F ${sim_m16_filter}  ${sim_m16_machine}  ${sim_igen_smp}"
 AC_SUBST(sim_igen_flags)
 AC_SUBST(sim_m16_flags)
 
diff --git a/sim/mips/interp.c b/sim/mips/interp.c
index 889cc9c..cc61dc6 100644
--- a/sim/mips/interp.c
+++ b/sim/mips/interp.c
@@ -79,6 +79,10 @@ char* pr_uword64 PARAMS ((uword64 addr));
 #include "oengine.c"
 #undef SIM_MANIFESTS
 
+/* Within interp.c we refer to the sim_state and sim_cpu directly. */
+#define SD sd
+#define CPU cpu
+
 
 /* The following reserved instruction value is used when a simulator
    trap is required. NOTE: Care must be taken, since this value may be
@@ -156,6 +160,7 @@ mips_option_handler (sd, opt, arg)
      int opt;
      char *arg;
 {
+  int cpu_nr;
   switch (opt)
     {
     case OPTION_DINERO_TRACE: /* ??? */
@@ -164,20 +169,24 @@ mips_option_handler (sd, opt, arg)
 	 allow external control of the program points being traced
 	 (i.e. only from main onwards, excluding the run-time setup,
 	 etc.). */
-      if (arg == NULL)
-	STATE |= simTRACE;
-      else if (strcmp (arg, "yes") == 0)
-	STATE |= simTRACE;
-      else if (strcmp (arg, "no") == 0)
-	STATE &= ~simTRACE;
-      else if (strcmp (arg, "on") == 0)
-	STATE |= simTRACE;
-      else if (strcmp (arg, "off") == 0)
-	STATE &= ~simTRACE;
-      else
+      for (cpu_nr = 0; cpu_nr < sim_engine_nr_cpus (sd); cpu_nr++)
 	{
-	  fprintf (stderr, "Unreconized dinero-trace option `%s'\n", arg);
-	  return SIM_RC_FAIL;
+	  sim_cpu *cpu = STATE_CPU (sd, cpu_nr);
+	  if (arg == NULL)
+	    STATE |= simTRACE;
+	  else if (strcmp (arg, "yes") == 0)
+	    STATE |= simTRACE;
+	  else if (strcmp (arg, "no") == 0)
+	    STATE &= ~simTRACE;
+	  else if (strcmp (arg, "on") == 0)
+	    STATE |= simTRACE;
+	  else if (strcmp (arg, "off") == 0)
+	    STATE &= ~simTRACE;
+	  else
+	    {
+	      fprintf (stderr, "Unreconized dinero-trace option `%s'\n", arg);
+	      return SIM_RC_FAIL;
+	    }
 	}
       return SIM_RC_OK;
 #else /* !TRACE */
@@ -228,6 +237,7 @@ int interrupt_pending;
 static void
 interrupt_event (SIM_DESC sd, void *data)
 {
+  sim_cpu *cpu = STATE_CPU (sd, 0); /* FIXME */
   if (SR & status_IE)
     {
       interrupt_pending = 0;
@@ -251,7 +261,7 @@ sim_open (kind, cb, abfd, argv)
      char **argv;
 {
   SIM_DESC sd = sim_state_alloc (kind, cb);
-  sim_cpu *cpu = STATE_CPU (sd, 0);
+  sim_cpu *cpu = STATE_CPU (sd, 0); /* FIXME */
 
   SIM_ASSERT (STATE_MAGIC (sd) == SIM_MAGIC_NUMBER);
 
@@ -475,9 +485,10 @@ sim_close (sd, quitting)
   if (tracefh != NULL && tracefh != stderr)
    fclose(tracefh);
   tracefh = NULL;
-  STATE &= ~simTRACE;
 #endif /* TRACE */
 
+  /* FIXME - free SD */
+
   return;
 }
 
@@ -490,6 +501,7 @@ sim_write (sd,addr,buffer,size)
      int size;
 {
   int index;
+  sim_cpu *cpu = STATE_CPU (sd, 0); /* FIXME */
 
   /* Return the number of bytes written, or zero if error. */
 #ifdef DEBUG
@@ -504,9 +516,9 @@ sim_write (sd,addr,buffer,size)
       address_word vaddr = (address_word)addr + index;
       address_word paddr;
       int cca;
-      if (!address_translation (sd, NULL_CIA, vaddr, isDATA, isSTORE, &paddr, &cca, isRAW))
+      if (!address_translation (SD, CPU, NULL_CIA, vaddr, isDATA, isSTORE, &paddr, &cca, isRAW))
 	break;
-      if (sim_core_write_buffer (sd, NULL, sim_core_read_map, buffer + index, paddr, 1) != 1)
+      if (sim_core_write_buffer (SD, CPU, sim_core_read_map, buffer + index, paddr, 1) != 1)
 	break;
     }
 
@@ -521,6 +533,7 @@ sim_read (sd,addr,buffer,size)
      int size;
 {
   int index;
+  sim_cpu *cpu = STATE_CPU (sd, 0); /* FIXME */
 
   /* Return the number of bytes read, or zero if error. */
 #ifdef DEBUG
@@ -532,9 +545,9 @@ sim_read (sd,addr,buffer,size)
       address_word vaddr = (address_word)addr + index;
       address_word paddr;
       int cca;
-      if (!address_translation (sd, NULL_CIA, vaddr, isDATA, isLOAD, &paddr, &cca, isRAW))
+      if (!address_translation (SD, CPU, NULL_CIA, vaddr, isDATA, isLOAD, &paddr, &cca, isRAW))
 	break;
-      if (sim_core_read_buffer (sd, NULL, sim_core_read_map, buffer + index, paddr, 1) != 1)
+      if (sim_core_read_buffer (SD, CPU, sim_core_read_map, buffer + index, paddr, 1) != 1)
 	break;
     }
 
@@ -547,7 +560,7 @@ sim_store_register (sd,rn,memory)
      int rn;
      unsigned char *memory;
 {
-  sim_cpu *cpu = STATE_CPU (sd, 0);
+  sim_cpu *cpu = STATE_CPU (sd, 0); /* FIXME */
   /* NOTE: gdb (the client) stores registers in target byte order
      while the simulator uses host byte order */
 #ifdef DEBUG
@@ -580,7 +593,7 @@ sim_fetch_register (sd,rn,memory)
      int rn;
      unsigned char *memory;
 {
-  sim_cpu *cpu = STATE_CPU (sd, 0);
+  sim_cpu *cpu = STATE_CPU (sd, 0); /* FIXME */
   /* NOTE: gdb (the client) stores registers in target byte order
      while the simulator uses host byte order */
 #ifdef DEBUG
@@ -657,8 +670,15 @@ sim_create_inferior (sd, abfd, argv,env)
   ColdReset(sd);
 
   if (abfd != NULL)
-    /* override PC value set by ColdReset () */
-    PC = (unsigned64) bfd_get_start_address (abfd);
+    {
+      /* override PC value set by ColdReset () */
+      int cpu_nr;
+      for (cpu_nr = 0; cpu_nr < sim_engine_nr_cpus (sd); cpu_nr++)
+	{
+	  sim_cpu *cpu = STATE_CPU (sd, cpu_nr);
+	  CIA_SET (cpu, (unsigned64) bfd_get_start_address (abfd));
+	}
+    }
 
 #if 0 /* def DEBUG */
   if (argv || env)
@@ -709,10 +729,10 @@ fetch_str (sd, addr)
 
 /* Simple monitor interface (currently setup for the IDT and PMON monitors) */
 static void
-sim_monitor(sd,cia,reason)
-     SIM_DESC sd;
-     address_word cia;
-     unsigned int reason;
+sim_monitor (SIM_DESC sd,
+	     sim_cpu *cpu,
+	     address_word cia,
+	     unsigned int reason)
 {
 #ifdef DEBUG
   printf("DBG: sim_monitor: entered (reason = %d)\n",reason);
@@ -796,7 +816,7 @@ sim_monitor(sd,cia,reason)
     case 17: /* void _exit() */
       {
 	sim_io_eprintf (sd, "sim_monitor(17): _exit(int reason) to be coded\n");
-	sim_engine_halt (sd, STATE_CPU (sd, 0), NULL, NULL_CIA, sim_exited,
+	sim_engine_halt (SD, CPU, NULL, NULL_CIA, sim_exited,
 			 (unsigned int)(A0 & 0xFFFFFFFF));
 	break;
       }
@@ -943,11 +963,11 @@ sim_monitor(sd,cia,reason)
 /* Store a word into memory.  */
 
 static void
-store_word (sd, cia, vaddr, val)
-     SIM_DESC sd;
-     address_word cia;
-     uword64 vaddr;
-     t_reg val;
+store_word (SIM_DESC sd,
+	    sim_cpu *cpu,
+	    address_word cia,
+	    uword64 vaddr,
+	    t_reg val)
 {
   address_word paddr;
   int uncached;
@@ -975,10 +995,10 @@ store_word (sd, cia, vaddr, val)
 /* Load a word from memory.  */
 
 static t_reg
-load_word (sd, cia, vaddr)
-     SIM_DESC sd;
-     address_word cia;
-     uword64 vaddr;
+load_word (SIM_DESC sd,
+	   sim_cpu *cpu,
+	   address_word cia,
+	   uword64 vaddr)
 {
   if ((vaddr & 3) != 0)
     SignalExceptionAddressLoad ();
@@ -1012,9 +1032,10 @@ load_word (sd, cia, vaddr)
    code, but for ease of simulation we just handle them directly.  */
 
 static void
-mips16_entry (sd,insn)
-     SIM_DESC sd;
-     unsigned int insn;
+mips16_entry (SIM_DESC sd,
+	      sim_cpu *cpu,
+	      address_word cia,
+	      unsigned int insn)
 {
   int aregs, sregs, rreg;
 
@@ -1038,7 +1059,7 @@ mips16_entry (sd,insn)
       /* This is the entry pseudo-instruction.  */
 
       for (i = 0; i < aregs; i++)
-	store_word ((uword64) (SP + 4 * i), GPR[i + 4]);
+	store_word (SD, CPU, cia, (uword64) (SP + 4 * i), GPR[i + 4]);
 
       tsp = SP;
       SP -= 32;
@@ -1046,13 +1067,13 @@ mips16_entry (sd,insn)
       if (rreg)
 	{
 	  tsp -= 4;
-	  store_word ((uword64) tsp, RA);
+	  store_word (SD, CPU, cia, (uword64) tsp, RA);
 	}
 
       for (i = 0; i < sregs; i++)
 	{
 	  tsp -= 4;
-	  store_word ((uword64) tsp, GPR[16 + i]);
+	  store_word (SD, CPU, cia, (uword64) tsp, GPR[16 + i]);
 	}
     }
   else
@@ -1067,13 +1088,13 @@ mips16_entry (sd,insn)
       if (rreg)
 	{
 	  tsp -= 4;
-	  RA = load_word ((uword64) tsp);
+	  RA = load_word (SD, CPU, cia, (uword64) tsp);
 	}
 
       for (i = 0; i < sregs; i++)
 	{
 	  tsp -= 4;
-	  GPR[i + 16] = load_word ((uword64) tsp);
+	  GPR[i + 16] = load_word (SD, CPU, cia, (uword64) tsp);
 	}
 
       SP += 32;
@@ -1137,7 +1158,13 @@ mips16_entry (sd,insn)
 
 
 void
-dotrace (SIM_DESC sd,FILE *tracefh,int type,SIM_ADDR address,int width,char *comment,...)
+dotrace (SIM_DESC sd,
+	 sim_cpu *cpu,
+	 FILE *tracefh,
+	 int type,
+	 SIM_ADDR address,
+	 int width,
+	 char *comment,...)
 {
   if (STATE & simTRACE) {
     va_list ap;
@@ -1173,39 +1200,42 @@ dotrace (SIM_DESC sd,FILE *tracefh,int type,SIM_ADDR address,int width,char *com
 /*---------------------------------------------------------------------------*/
 
 static void
-ColdReset (sd)
-     SIM_DESC sd;
+ColdReset (SIM_DESC sd)
 {
-  /* RESET: Fixed PC address: */
-  PC = UNSIGNED64 (0xFFFFFFFFBFC00000);
-  /* The reset vector address is in the unmapped, uncached memory space. */
-
-  SR &= ~(status_SR | status_TS | status_RP);
-  SR |= (status_ERL | status_BEV);
-
-  /* Cheat and allow access to the complete register set immediately */
-  if (CURRENT_FLOATING_POINT == HARD_FLOATING_POINT
-      && WITH_TARGET_WORD_BITSIZE == 64)
-    SR |= status_FR; /* 64bit registers */
-
-  /* Ensure that any instructions with pending register updates are
-     cleared: */
-  {
-    int loop;
-    for (loop = 0; (loop < PSLOTS); loop++)
-     PENDING_SLOT_REG[loop] = (LAST_EMBED_REGNUM + 1);
-    PENDING_IN = PENDING_OUT = PENDING_TOTAL = 0;
-  }
-
-  /* Initialise the FPU registers to the unknown state */
-  if (CURRENT_FLOATING_POINT == HARD_FLOATING_POINT)
+  int cpu_nr;
+  for (cpu_nr = 0; cpu_nr < sim_engine_nr_cpus (sd); cpu_nr++)
     {
-      int rn;
-      for (rn = 0; (rn < 32); rn++)
-	FPR_STATE[rn] = fmt_uninterpreted;
+      sim_cpu *cpu = STATE_CPU (sd, cpu_nr);
+      /* RESET: Fixed PC address: */
+      PC = UNSIGNED64 (0xFFFFFFFFBFC00000);
+      /* The reset vector address is in the unmapped, uncached memory space. */
+      
+      SR &= ~(status_SR | status_TS | status_RP);
+      SR |= (status_ERL | status_BEV);
+      
+      /* Cheat and allow access to the complete register set immediately */
+      if (CURRENT_FLOATING_POINT == HARD_FLOATING_POINT
+	  && WITH_TARGET_WORD_BITSIZE == 64)
+	SR |= status_FR; /* 64bit registers */
+      
+      /* Ensure that any instructions with pending register updates are
+	 cleared: */
+      {
+	int loop;
+	for (loop = 0; (loop < PSLOTS); loop++)
+	  PENDING_SLOT_REG[loop] = (LAST_EMBED_REGNUM + 1);
+	PENDING_IN = PENDING_OUT = PENDING_TOTAL = 0;
+      }
+      
+      /* Initialise the FPU registers to the unknown state */
+      if (CURRENT_FLOATING_POINT == HARD_FLOATING_POINT)
+	{
+	  int rn;
+	  for (rn = 0; (rn < 32); rn++)
+	    FPR_STATE[rn] = fmt_uninterpreted;
+	}
+      
     }
-
-  return;
 }
 
 /* Description from page A-22 of the "MIPS IV Instruction Set" manual
@@ -1227,15 +1257,15 @@ ColdReset (sd)
    function raises an exception and does not return. */
 
 int
-address_translation(sd,cia,vAddr,IorD,LorS,pAddr,CCA,raw)
-     SIM_DESC sd;
-     address_word cia;
-     address_word vAddr;
-     int IorD;
-     int LorS;
-     address_word *pAddr;
-     int *CCA;
-     int raw;
+address_translation (SIM_DESC sd,
+		     sim_cpu *cpu,
+		     address_word cia,
+		     address_word vAddr,
+		     int IorD,
+		     int LorS,
+		     address_word *pAddr,
+		     int *CCA,
+		     int raw)
 {
   int res = -1; /* TRUE : Assume good return */
 
@@ -1263,14 +1293,14 @@ address_translation(sd,cia,vAddr,IorD,LorS,pAddr,CCA,raw)
    program, or alter architecturally-visible state. */
 
 void 
-prefetch(sd,cia,CCA,pAddr,vAddr,DATA,hint)
-     SIM_DESC sd;
-     address_word cia;
-     int CCA;
-     address_word pAddr;
-     address_word vAddr;
-     int DATA;
-     int hint;
+prefetch (SIM_DESC sd,
+	  sim_cpu *cpu,
+	  address_word cia,
+	  int CCA,
+	  address_word pAddr,
+	  address_word vAddr,
+	  int DATA,
+	  int hint)
 {
 #ifdef DEBUG
   sim_io_printf(sd,"Prefetch(%d,0x%s,0x%s,%d,%d);\n",CCA,pr_addr(pAddr),pr_addr(vAddr),DATA,hint);
@@ -1297,16 +1327,16 @@ prefetch(sd,cia,CCA,pAddr,vAddr,DATA,hint)
    satisfy a load reference. At a minimum, the block is the entire
    memory element. */
 void
-load_memory(sd,cia,memvalp,memval1p,CCA,AccessLength,pAddr,vAddr,IorD)
-     SIM_DESC sd;
-     address_word cia;
-     uword64* memvalp;
-     uword64* memval1p;
-     int CCA;
-     int AccessLength;
-     address_word pAddr;
-     address_word vAddr;
-     int IorD;
+load_memory (SIM_DESC sd,
+	     sim_cpu *cpu,
+	     address_word cia,
+	     uword64* memvalp,
+	     uword64* memval1p,
+	     int CCA,
+	     int AccessLength,
+	     address_word pAddr,
+	     address_word vAddr,
+	     int IorD)
 {
   uword64 value = 0;
   uword64 value1 = 0;
@@ -1337,7 +1367,7 @@ load_memory(sd,cia,memvalp,memval1p,CCA,AccessLength,pAddr,vAddr,IorD)
     }
 
 #if defined(TRACE)
-  dotrace(sd,tracefh,((IorD == isDATA) ? 0 : 2),(unsigned int)(pAddr&0xFFFFFFFF),(AccessLength + 1),"load%s",((IorD == isDATA) ? "" : " instruction"));
+  dotrace (SD, CPU, tracefh,((IorD == isDATA) ? 0 : 2),(unsigned int)(pAddr&0xFFFFFFFF),(AccessLength + 1),"load%s",((IorD == isDATA) ? "" : " instruction"));
 #endif /* TRACE */
   
   /* Read the specified number of bytes from memory.  Adjust for
@@ -1348,38 +1378,38 @@ load_memory(sd,cia,memvalp,memval1p,CCA,AccessLength,pAddr,vAddr,IorD)
     {
     case AccessLength_QUADWORD :
       {
-	unsigned_16 val = sim_core_read_aligned_16 (STATE_CPU (sd, 0), NULL_CIA,
+	unsigned_16 val = sim_core_read_aligned_16 (cpu, NULL_CIA,
 						    sim_core_read_map, pAddr);
 	value1 = VH8_16 (val);
 	value = VL8_16 (val);
 	break;
       }
     case AccessLength_DOUBLEWORD :
-      value = sim_core_read_aligned_8 (STATE_CPU (sd, 0), NULL_CIA,
+      value = sim_core_read_aligned_8 (cpu, NULL_CIA,
 				       sim_core_read_map, pAddr);
       break;
     case AccessLength_SEPTIBYTE :
-      value = sim_core_read_misaligned_7 (STATE_CPU (sd, 0), NULL_CIA,
+      value = sim_core_read_misaligned_7 (cpu, NULL_CIA,
 					  sim_core_read_map, pAddr);
     case AccessLength_SEXTIBYTE :
-      value = sim_core_read_misaligned_6 (STATE_CPU (sd, 0), NULL_CIA,
+      value = sim_core_read_misaligned_6 (cpu, NULL_CIA,
 					  sim_core_read_map, pAddr);
     case AccessLength_QUINTIBYTE :
-      value = sim_core_read_misaligned_5 (STATE_CPU (sd, 0), NULL_CIA,
+      value = sim_core_read_misaligned_5 (cpu, NULL_CIA,
 					  sim_core_read_map, pAddr);
     case AccessLength_WORD :
-      value = sim_core_read_aligned_4 (STATE_CPU (sd, 0), NULL_CIA,
+      value = sim_core_read_aligned_4 (cpu, NULL_CIA,
 				       sim_core_read_map, pAddr);
       break;
     case AccessLength_TRIPLEBYTE :
-      value = sim_core_read_misaligned_3 (STATE_CPU (sd, 0), NULL_CIA,
+      value = sim_core_read_misaligned_3 (cpu, NULL_CIA,
 					  sim_core_read_map, pAddr);
     case AccessLength_HALFWORD :
-      value = sim_core_read_aligned_2 (STATE_CPU (sd, 0), NULL_CIA,
+      value = sim_core_read_aligned_2 (cpu, NULL_CIA,
 				       sim_core_read_map, pAddr);
       break;
     case AccessLength_BYTE :
-      value = sim_core_read_aligned_1 (STATE_CPU (sd, 0), NULL_CIA,
+      value = sim_core_read_aligned_1 (cpu, NULL_CIA,
 				       sim_core_read_map, pAddr);
       break;
     default:
@@ -1428,15 +1458,15 @@ load_memory(sd,cia,memvalp,memval1p,CCA,AccessLength,pAddr,vAddr,IorD)
    will be changed. */
 
 void
-store_memory(sd,cia,CCA,AccessLength,MemElem,MemElem1,pAddr,vAddr)
-     SIM_DESC sd;
-     address_word cia;
-     int CCA;
-     int AccessLength;
-     uword64 MemElem;
-     uword64 MemElem1;   /* High order 64 bits */
-     address_word pAddr;
-     address_word vAddr;
+store_memory (SIM_DESC sd,
+	      sim_cpu *cpu,
+	      address_word cia,
+	      int CCA,
+	      int AccessLength,
+	      uword64 MemElem,
+	      uword64 MemElem1,   /* High order 64 bits */
+	      address_word pAddr,
+	      address_word vAddr)
 {
 #ifdef DEBUG
   sim_io_printf(sd,"DBG: StoreMemory(%d,%d,0x%s,0x%s,0x%s,0x%s)\n",CCA,AccessLength,pr_uword64(MemElem),pr_uword64(MemElem1),pr_addr(pAddr),pr_addr(vAddr));
@@ -1451,7 +1481,7 @@ store_memory(sd,cia,CCA,AccessLength,MemElem,MemElem1,pAddr,vAddr)
     sim_io_error(sd,"AccessLength of %d would extend over %dbit aligned boundary for physical address 0x%s\n",AccessLength,(LOADDRMASK + 1)<<2,pr_addr(pAddr));
   
 #if defined(TRACE)
-  dotrace(sd,tracefh,1,(unsigned int)(pAddr&0xFFFFFFFF),(AccessLength + 1),"store");
+  dotrace (SD, CPU, tracefh,1,(unsigned int)(pAddr&0xFFFFFFFF),(AccessLength + 1),"store");
 #endif /* TRACE */
   
 #ifdef DEBUG
@@ -1480,40 +1510,40 @@ store_memory(sd,cia,CCA,AccessLength,MemElem,MemElem1,pAddr,vAddr)
     case AccessLength_QUADWORD :
       {
 	unsigned_16 val = U16_8 (MemElem1, MemElem);
-	sim_core_write_aligned_16 (STATE_CPU (sd, 0), NULL_CIA,
+	sim_core_write_aligned_16 (cpu, NULL_CIA,
 				   sim_core_write_map, pAddr, val);
 	break;
       }
     case AccessLength_DOUBLEWORD :
-      sim_core_write_aligned_8 (STATE_CPU (sd, 0), NULL_CIA,
+      sim_core_write_aligned_8 (cpu, NULL_CIA,
 				sim_core_write_map, pAddr, MemElem);
       break;
     case AccessLength_SEPTIBYTE :
-      sim_core_write_misaligned_7 (STATE_CPU (sd, 0), NULL_CIA,
+      sim_core_write_misaligned_7 (cpu, NULL_CIA,
 				   sim_core_write_map, pAddr, MemElem);
       break;
     case AccessLength_SEXTIBYTE :
-      sim_core_write_misaligned_6 (STATE_CPU (sd, 0), NULL_CIA,
+      sim_core_write_misaligned_6 (cpu, NULL_CIA,
 				   sim_core_write_map, pAddr, MemElem);
       break;
     case AccessLength_QUINTIBYTE :
-      sim_core_write_misaligned_5 (STATE_CPU (sd, 0), NULL_CIA,
+      sim_core_write_misaligned_5 (cpu, NULL_CIA,
 				   sim_core_write_map, pAddr, MemElem);
       break;
     case AccessLength_WORD :
-      sim_core_write_aligned_4 (STATE_CPU (sd, 0), NULL_CIA,
+      sim_core_write_aligned_4 (cpu, NULL_CIA,
 				sim_core_write_map, pAddr, MemElem);
       break;
     case AccessLength_TRIPLEBYTE :
-      sim_core_write_misaligned_3 (STATE_CPU (sd, 0), NULL_CIA,
+      sim_core_write_misaligned_3 (cpu, NULL_CIA,
 				   sim_core_write_map, pAddr, MemElem);
       break;
     case AccessLength_HALFWORD :
-      sim_core_write_aligned_2 (STATE_CPU (sd, 0), NULL_CIA,
+      sim_core_write_aligned_2 (cpu, NULL_CIA,
 				sim_core_write_map, pAddr, MemElem);
       break;
     case AccessLength_BYTE :
-      sim_core_write_aligned_1 (STATE_CPU (sd, 0), NULL_CIA,
+      sim_core_write_aligned_1 (cpu, NULL_CIA,
 				sim_core_write_map, pAddr, MemElem);
       break;
     default:
@@ -1526,6 +1556,7 @@ store_memory(sd,cia,CCA,AccessLength,MemElem,MemElem1,pAddr,vAddr)
 
 unsigned32
 ifetch32 (SIM_DESC sd,
+	  sim_cpu *cpu,
 	  address_word cia,
 	  address_word vaddr)
 {
@@ -1552,10 +1583,10 @@ ifetch32 (SIM_DESC sd,
    loads and stores indicated by stype occur in the same order for all
    processors. */
 void
-sync_operation(sd,cia,stype)
-     SIM_DESC sd;
-     address_word cia;
-     int stype;
+sync_operation (SIM_DESC sd,
+		sim_cpu *cpu,
+		address_word cia,
+		int stype)
 {
 #ifdef DEBUG
   sim_io_printf(sd,"SyncOperation(%d) : TODO\n",stype);
@@ -1570,6 +1601,7 @@ sync_operation(sd,cia,stype)
 
 void
 signal_exception (SIM_DESC sd,
+		  sim_cpu *cpu,
 		  address_word cia,
 		  int exception,...)
 {
@@ -1627,7 +1659,7 @@ signal_exception (SIM_DESC sd,
           Debug |= Debug_DM;            /* in debugging mode */
           Debug |= Debug_DBp;           /* raising a DBp exception */
           PC = 0xBFC00200;
-          sim_engine_restart (sd, STATE_CPU (sd, 0), NULL, NULL_CIA);
+          sim_engine_restart (SD, CPU, NULL, NULL_CIA);
         }
       break;
 
@@ -1649,11 +1681,11 @@ signal_exception (SIM_DESC sd,
           perform this magic. */
        if ((instruction & RSVD_INSTRUCTION_MASK) == RSVD_INSTRUCTION)
 	 {
-	   sim_monitor(sd, cia, ((instruction >> RSVD_INSTRUCTION_ARG_SHIFT) & RSVD_INSTRUCTION_ARG_MASK) );
+	   sim_monitor (SD, CPU, cia, ((instruction >> RSVD_INSTRUCTION_ARG_SHIFT) & RSVD_INSTRUCTION_ARG_MASK) );
 	   /* NOTE: This assumes that a branch-and-link style
 	      instruction was used to enter the vector (which is the
 	      case with the current IDT monitor). */
-	   sim_engine_restart (sd, STATE_CPU (sd, 0), NULL, RA);
+	   sim_engine_restart (SD, CPU, NULL, RA);
 	 }
        /* Look for the mips16 entry and exit instructions, and
           simulate a handler for them.  */
@@ -1661,7 +1693,7 @@ signal_exception (SIM_DESC sd,
 		&& (instruction & 0xf81f) == 0xe809
 		&& (instruction & 0x0c0) != 0x0c0)
 	 {
-	   mips16_entry (instruction);
+	   mips16_entry (SD, CPU, cia, instruction);
 	   sim_engine_restart (sd, NULL, NULL, NULL_CIA);
 	 }
        /* else fall through to normal exception processing */
@@ -1682,7 +1714,7 @@ signal_exception (SIM_DESC sd,
 	va_end(ap);
 	/* Check for our special terminating BREAK: */
 	if ((instruction & 0x03FFFFC0) == 0x03ff0000) {
-	  sim_engine_halt (sd, STATE_CPU (sd, 0), NULL, cia,
+	  sim_engine_halt (SD, CPU, NULL, cia,
 			   sim_exited, (unsigned int)(A0 & 0xFFFFFFFF));
 	}
       }
@@ -1690,7 +1722,7 @@ signal_exception (SIM_DESC sd,
 	PC = cia - 4; /* reference the branch instruction */
       else
 	PC = cia;
-      sim_engine_halt (sd, STATE_CPU (sd, 0), NULL, cia,
+      sim_engine_halt (SD, CPU, NULL, cia,
 		       sim_stopped, SIM_SIGTRAP);
 
     default:
@@ -1745,35 +1777,35 @@ signal_exception (SIM_DESC sd,
 	 /* The following is so that the simulator will continue from the
 	    exception address on breakpoint operations. */
 	 PC = EPC;
-	 sim_engine_halt (sd, STATE_CPU (sd, 0), NULL, NULL_CIA,
+	 sim_engine_halt (SD, CPU, NULL, NULL_CIA,
 			  sim_stopped, SIM_SIGBUS);
 
        case ReservedInstruction:
        case CoProcessorUnusable:
 	 PC = EPC;
-	 sim_engine_halt (sd, STATE_CPU (sd, 0), NULL, NULL_CIA,
+	 sim_engine_halt (SD, CPU, NULL, NULL_CIA,
 			  sim_stopped, SIM_SIGILL);
 
        case IntegerOverflow:
        case FPE:
-	 sim_engine_halt (sd, STATE_CPU (sd, 0), NULL, NULL_CIA,
+	 sim_engine_halt (SD, CPU, NULL, NULL_CIA,
 			  sim_stopped, SIM_SIGFPE);
 
        case Trap:
        case Watch:
        case SystemCall:
 	 PC = EPC;
-	 sim_engine_halt (sd, STATE_CPU (sd, 0), NULL, NULL_CIA,
+	 sim_engine_halt (SD, CPU, NULL, NULL_CIA,
 			  sim_stopped, SIM_SIGTRAP);
 
        case BreakPoint:
 	 PC = EPC;
-	 sim_engine_abort (sd, STATE_CPU (sd, 0), NULL_CIA,
+	 sim_engine_abort (SD, CPU, NULL_CIA,
 			   "FATAL: Should not encounter a breakpoint\n");
 
        default : /* Unknown internal exception */
 	 PC = EPC;
-	 sim_engine_halt (sd, STATE_CPU (sd, 0), NULL, NULL_CIA,
+	 sim_engine_halt (SD, CPU, NULL, NULL_CIA,
 			  sim_stopped, SIM_SIGABRT);
 
        }
@@ -1785,7 +1817,7 @@ signal_exception (SIM_DESC sd,
        va_start(ap,exception);
        msg = va_arg(ap,char *);
        va_end(ap);
-       sim_engine_abort (sd, STATE_CPU (sd, 0), NULL_CIA,
+       sim_engine_abort (SD, CPU, NULL_CIA,
 			 "FATAL: Simulator error \"%s\"\n",msg);
      }
    }
@@ -1817,13 +1849,13 @@ undefined_result(sd,cia)
 #endif /* WARN_RESULT */
 
 void
-cache_op(sd,cia,op,pAddr,vAddr,instruction)
-     SIM_DESC sd;
-     address_word cia;
-     int op;
-     address_word pAddr;
-     address_word vAddr;
-     unsigned int instruction;
+cache_op (SIM_DESC sd,
+	  sim_cpu *cpu,
+	  address_word cia,
+	  int op,
+	  address_word pAddr,
+	  address_word vAddr,
+	  unsigned int instruction)
 {
 #if 1 /* stop warning message being displayed (we should really just remove the code) */
   static int icache_warning = 1;
@@ -1953,11 +1985,11 @@ cache_op(sd,cia,op,pAddr,vAddr,instruction)
 #endif /* DEBUG */
 
 uword64
-value_fpr(sd,cia,fpr,fmt)
-     SIM_DESC sd;
-     address_word cia;
-     int fpr;
-     FP_formats fmt;
+value_fpr (SIM_DESC sd,
+	   sim_cpu *cpu,
+	   address_word cia,
+	   int fpr,
+	   FP_formats fmt)
 {
   uword64 value = 0;
   int err = 0;
@@ -2058,12 +2090,12 @@ value_fpr(sd,cia,fpr,fmt)
 }
 
 void
-store_fpr(sd,cia,fpr,fmt,value)
-     SIM_DESC sd;
-     address_word cia;
-     int fpr;
-     FP_formats fmt;
-     uword64 value;
+store_fpr (SIM_DESC sd,
+	   sim_cpu *cpu,
+	   address_word cia,
+	   int fpr,
+	   FP_formats fmt,
+	   uword64 value)
 {
   int err = 0;
 
@@ -2711,13 +2743,13 @@ SquareRoot(op,fmt)
 }
 
 uword64
-convert(sd,cia,rm,op,from,to)
-     SIM_DESC sd;
-     address_word cia;
-     int rm;
-     uword64 op;
-     FP_formats from; 
-     FP_formats to; 
+convert (SIM_DESC sd,
+	 sim_cpu *cpu,
+	 address_word cia,
+	 int rm,
+	 uword64 op,
+	 FP_formats from,
+	 FP_formats to)
 {
   sim_fpu wop;
   sim_fpu_round round;
@@ -2828,11 +2860,12 @@ CoProcPresent(coproc_number)
 }
 
 void
-cop_lw(sd,cia,coproc_num,coproc_reg,memword)
-     SIM_DESC sd;
-     address_word cia;
-     int coproc_num, coproc_reg;
-     unsigned int memword;
+cop_lw (SIM_DESC sd,
+	sim_cpu *cpu,
+	address_word cia,
+	int coproc_num,
+	int coproc_reg,
+	unsigned int memword)
 {
   switch (coproc_num) {
 #if defined(HASFPU)
@@ -2856,11 +2889,12 @@ cop_lw(sd,cia,coproc_num,coproc_reg,memword)
 }
 
 void
-cop_ld(sd,cia,coproc_num,coproc_reg,memword)
-     SIM_DESC sd;
-     address_word cia;
-     int coproc_num, coproc_reg;
-     uword64 memword;
+cop_ld (SIM_DESC sd,
+	sim_cpu *cpu,
+	address_word cia,
+	int coproc_num,
+	int coproc_reg,
+	uword64 memword)
 {
   switch (coproc_num) {
 #if defined(HASFPU)
@@ -2880,10 +2914,11 @@ cop_ld(sd,cia,coproc_num,coproc_reg,memword)
 }
 
 unsigned int
-cop_sw(sd,cia,coproc_num,coproc_reg)
-     SIM_DESC sd;
-     address_word cia;
-     int coproc_num, coproc_reg;
+cop_sw (SIM_DESC sd,
+	sim_cpu *cpu,
+	address_word cia,
+	int coproc_num,
+	int coproc_reg)
 {
   unsigned int value = 0;
 
@@ -2922,10 +2957,11 @@ cop_sw(sd,cia,coproc_num,coproc_reg)
 }
 
 uword64
-cop_sd(sd,cia,coproc_num,coproc_reg)
-     SIM_DESC sd;
-     address_word cia;
-     int coproc_num, coproc_reg;
+cop_sd (SIM_DESC sd,
+	sim_cpu *cpu,
+	address_word cia,
+	int coproc_num,
+	int coproc_reg)
 {
   uword64 value = 0;
   switch (coproc_num) {
@@ -2957,10 +2993,10 @@ cop_sd(sd,cia,coproc_num,coproc_reg)
 }
 
 void
-decode_coproc(sd,cia,instruction)
-     SIM_DESC sd;
-     address_word cia;
-     unsigned int instruction;
+decode_coproc (SIM_DESC sd,
+	       sim_cpu *cpu,
+	       address_word cia,
+	       unsigned int instruction)
 {
   int coprocnum = ((instruction >> 26) & 3);
 
@@ -3130,6 +3166,7 @@ sim_engine_run (sd, next_cpu_nr, nr_cpus, siggnal)
      int nr_cpus; /* ignore */
      int siggnal; /* ignore */
 {
+  sim_cpu *cpu = STATE_CPU (sd, 0); /* hardwire to cpu 0 */
 #if !defined(FASTSIM)
   unsigned int pipeline_count = 1;
 #endif
diff --git a/sim/mips/mdmx.igen b/sim/mips/mdmx.igen
index e9c2b85..9d2aca4 100644
--- a/sim/mips/mdmx.igen
+++ b/sim/mips/mdmx.igen
@@ -47,11 +47,11 @@
       return 1;
     case 3:
       /* bi word - ss011 */
-      semantic_illegal (sd, cia);
+      semantic_illegal (CPU_, cia);
       return 2;
     case 7:
       /* long - ss111 */
-      semantic_illegal (sd, cia);
+      semantic_illegal (CPU_, cia);
       return 3;
     default:
       abort ();
@@ -74,8 +74,8 @@
     case fmt_unknown:
       break;
     default:
-      sim_io_eprintf(sd, "Vector %d format invalid (PC = 0x%08lx)\n",
-		     fpr, (long) cia);
+      sim_io_eprintf (SD, "Vector %d format invalid (PC = 0x%08lx)\n",
+		      fpr, (long) CIA);
       FPR_STATE[fpr] = fmt_unknown;
     }
   switch (scale)
@@ -107,8 +107,8 @@
     case fmt_unknown:
       break;
     default:
-      sim_io_eprintf(sd, "Vector %d format invalid (PC = 0x%08lx)\n",
-		     fpr, (long) cia);
+      sim_io_eprintf (SD, "Vector %d format invalid (PC = 0x%08lx)\n",
+		      fpr, (long) cia);
       FPR_STATE[fpr] = fmt_unknown;
     }
   switch (scale)
@@ -219,13 +219,12 @@
 
 :function:::void:store_cc:int i, int value
 {
-  abort ();
+  SETFCC (i, value);
 }
 
-:function:::int:fetch_cc:int i
+:function:::int:value_cc:int i
 {
-  abort ();
-  return 0;
+  return GETFCC (i);
 }
 
 
@@ -366,8 +365,8 @@
 :function:::void:ByteAlign:int vd, int imm, int vs, int vt
 {
   int s = imm * 8;
-  unsigned64 rs = value_fpr (sd, cia, vs, fmt_long);
-  unsigned64 rt = value_fpr (sd, cia, vt, fmt_long);
+  unsigned64 rs = ValueFPR (vs, fmt_long);
+  unsigned64 rt = ValueFPR (vt, fmt_long);
   unsigned64 rd;
   if (BigEndianCPU)
     {
@@ -387,7 +386,7 @@
 	rd = (MOVED64 (rs, s, 0, 63, 64 - s)
 	      | EXTRACTED64 (rt, 63, s));
     }
-  store_fpr (sd, cia, vd, rd, fmt_long);
+  StoreFPR (vd, fmt_long, rd);
 }
 
 010010,00,3.IMM,5.VT,5.VS,5.VD,0110,X,0::::ALNI.fmt
@@ -743,7 +742,7 @@
   int scale = get_scale (SD_, SEL);
   for (i = 0; i < (8 >> scale); i++)
     store_vr (SD_, scale, VD, i,
-	      (fetch_cc (SD_, i) == 0
+	      (value_cc (SD_, i) == 0
 	       ? value_vr (SD_, scale, VS, i)
 	       : select_vr (SD_, SEL, VT, i)));
 }
@@ -763,7 +762,7 @@
   int scale = get_scale (SD_, SEL);
   for (i = 0; i < (8 >> scale); i++)
     store_vr (SD_, scale, VD, i,
-	      (fetch_cc (SD_, i) != 0
+	      (value_cc (SD_, i) != 0
 	       ? value_vr (SD_, scale, VS, i)
 	       : select_vr (SD_, SEL, VT, i)));
 }
diff --git a/sim/mips/sim-main.h b/sim/mips/sim-main.h
index 1f56c78..fdb023c 100644
--- a/sim/mips/sim-main.h
+++ b/sim/mips/sim-main.h
@@ -93,11 +93,11 @@ typedef enum {
  fmt_uninterpreted_64 = 0x80000000,
 } FP_formats;
 
-unsigned64 value_fpr PARAMS ((SIM_DESC sd, address_word cia, int fpr, FP_formats));
-#define ValueFPR(FPR,FMT) value_fpr (sd, cia, (FPR), (FMT))
+unsigned64 value_fpr PARAMS ((SIM_DESC sd, sim_cpu *cpu, address_word cia, int fpr, FP_formats));
+#define ValueFPR(FPR,FMT) value_fpr (SD, CPU, cia, (FPR), (FMT))
 
-void store_fpr PARAMS ((SIM_DESC sd, address_word cia, int fpr, FP_formats fmt, unsigned64 value));
-#define StoreFPR(FPR,FMT,VALUE) store_fpr (sd, cia, (FPR), (FMT), (VALUE))
+void store_fpr PARAMS ((SIM_DESC sd, sim_cpu *cpu, address_word cia, int fpr, FP_formats fmt, unsigned64 value));
+#define StoreFPR(FPR,FMT,VALUE) store_fpr (SD, CPU, cia, (FPR), (FMT), (VALUE))
 
 int NaN PARAMS ((unsigned64 op, FP_formats fmt));
 int Infinity PARAMS ((unsigned64 op, FP_formats fmt));
@@ -111,8 +111,9 @@ unsigned64 Multiply PARAMS ((unsigned64 op1, unsigned64 op2, FP_formats fmt));
 unsigned64 Divide PARAMS ((unsigned64 op1, unsigned64 op2, FP_formats fmt));
 unsigned64 Recip PARAMS ((unsigned64 op, FP_formats fmt));
 unsigned64 SquareRoot PARAMS ((unsigned64 op, FP_formats fmt));
-unsigned64 convert PARAMS ((SIM_DESC sd, address_word cia, int rm, unsigned64 op, FP_formats from, FP_formats to));
-#define Convert(rm,op,from,to) convert(sd,cia,rm,op,from,to)
+unsigned64 convert PARAMS ((SIM_DESC sd, sim_cpu *cpu, address_word cia, int rm, unsigned64 op, FP_formats from, FP_formats to));
+#define Convert(rm,op,from,to) \
+convert (SD, CPU, cia, rm, op, from, to)
 
 /* Macro to update FPSR condition-code field. This is complicated by
    the fact that there is a hole in the index range of the bits within
@@ -292,7 +293,7 @@ struct _sim_cpu {
 #define CIA_GET(CPU) ((CPU)->registers[PCIDX] + 0)
 #define CIA_SET(CPU,CIA) ((CPU)->registers[PCIDX] = (CIA))
   address_word dspc;  /* delay-slot PC */
-#define DSPC ((STATE_CPU (sd,0))->dspc)
+#define DSPC ((CPU)->dspc)
 
   /* Issue a delay slot instruction immediatly by re-calling
      idecode_issue */
@@ -300,18 +301,18 @@ struct _sim_cpu {
   do { \
     address_word target = (TARGET); \
     instruction_word delay_insn; \
-    sim_events_slip (sd, 1); \
+    sim_events_slip (SD, 1); \
     CIA = CIA + 4; \
     STATE |= simDELAYSLOT; \
     delay_insn = IMEM (CIA); \
-    idecode_issue (sd, delay_insn, (CIA)); \
+    idecode_issue (CPU_, delay_insn, (CIA)); \
     STATE &= ~simDELAYSLOT; \
     NIA = target; \
   } while (0)
 #define NULLIFY_NEXT_INSTRUCTION() \
   do { \
-    sim_events_slip (sd, 1); \
-    dotrace (sd, tracefh, 2, NIA, 4, "load instruction"); \
+    sim_events_slip (SD, 1); \
+    dotrace (SD, CPU, tracefh, 2, NIA, 4, "load instruction"); \
     NIA = CIA + 8; \
   } while (0)
 
@@ -320,8 +321,8 @@ struct _sim_cpu {
   /* State of the simulator */
   unsigned int state;
   unsigned int dsstate;
-#define STATE ((STATE_CPU (sd,0))->state)
-#define DSSTATE ((STATE_CPU (sd,0))->dsstate)
+#define STATE ((CPU)->state)
+#define DSSTATE ((CPU)->dsstate)
 
 /* Flags in the "state" variable: */
 #define simHALTEX       (1 << 2)  /* 0 = run; 1 = halt on exception */
@@ -371,7 +372,7 @@ struct _sim_cpu {
 
   unsigned_word registers[LAST_EMBED_REGNUM + 1];
   int register_widths[NUM_REGS];
-#define REGISTERS       ((STATE_CPU (sd,0))->registers)
+#define REGISTERS       ((CPU)->registers)
 
 #define GPR     (&REGISTERS[0])
 #define GPR_SET(N,VAL) (REGISTERS[(N)] = (VAL))
@@ -395,7 +396,7 @@ struct _sim_cpu {
 #define COCIDX  (LAST_EMBED_REGNUM + 2) /* special case : outside the normal range */
 
   unsigned_word c0_config_reg;
-#define C0_CONFIG ((STATE_CPU (sd,0))->c0_config_reg)
+#define C0_CONFIG ((CPU)->c0_config_reg)
 
 /* The following are pseudonyms for standard registers */
 #define ZERO    (REGISTERS[0])
@@ -409,7 +410,7 @@ struct _sim_cpu {
 
   /* Keep the current format state for each register: */
   FP_formats fpr_state[32];
-#define FPR_STATE ((STATE_CPU (sd, 0))->fpr_state)
+#define FPR_STATE ((CPU)->fpr_state)
 
 
   /* Slots for delayed register updates. For the moment we just have a
@@ -424,12 +425,12 @@ struct _sim_cpu {
   int pending_slot_count[PSLOTS];
   int pending_slot_reg[PSLOTS];
   unsigned_word pending_slot_value[PSLOTS];
-#define PENDING_IN ((STATE_CPU (sd, 0))->pending_in)
-#define PENDING_OUT ((STATE_CPU (sd, 0))->pending_out)
-#define PENDING_TOTAL ((STATE_CPU (sd, 0))->pending_total)
-#define PENDING_SLOT_COUNT ((STATE_CPU (sd, 0))->pending_slot_count)
-#define PENDING_SLOT_REG ((STATE_CPU (sd, 0))->pending_slot_reg)
-#define PENDING_SLOT_VALUE ((STATE_CPU (sd, 0))->pending_slot_value)
+#define PENDING_IN ((CPU)->pending_in)
+#define PENDING_OUT ((CPU)->pending_out)
+#define PENDING_TOTAL ((CPU)->pending_total)
+#define PENDING_SLOT_COUNT ((CPU)->pending_slot_count)
+#define PENDING_SLOT_REG ((CPU)->pending_slot_reg)
+#define PENDING_SLOT_VALUE ((CPU)->pending_slot_value)
 
   /* The following are not used for MIPS IV onwards: */
 #define PENDING_FILL(r,v) {\
@@ -455,7 +456,7 @@ struct _sim_cpu {
      no longer be atomic. In particular, it is cleared by exception
      return instructions. */
   int llbit;
-#define LLBIT ((STATE_CPU (sd, 0))->llbit)
+#define LLBIT ((CPU)->llbit)
 
 
 /* The HIACCESS and LOACCESS counts are used to ensure that
@@ -464,13 +465,13 @@ struct _sim_cpu {
 
   int hiaccess;
   int loaccess;
-#define HIACCESS ((STATE_CPU (sd, 0))->hiaccess)
-#define LOACCESS ((STATE_CPU (sd, 0))->loaccess)
+#define HIACCESS ((CPU)->hiaccess)
+#define LOACCESS ((CPU)->loaccess)
   /* start-sanitize-r5900 */
   int hi1access;
   int lo1access;
-#define HI1ACCESS ((STATE_CPU (sd, 0))->hi1access)
-#define LO1ACCESS ((STATE_CPU (sd, 0))->lo1access)
+#define HI1ACCESS ((CPU)->hi1access)
+#define LO1ACCESS ((CPU)->lo1access)
   /* end-sanitize-r5900 */
 #if 1
   /* The 4300 and a few other processors have interlocks on hi/lo
@@ -510,14 +511,14 @@ struct _sim_cpu {
      refers to the high 64 bits of that same register.  */
 
   signed_word registers1[LAST_EMBED_REGNUM + 1];
-#define REGISTERS1 ((STATE_CPU (sd, 0))->registers1)
+#define REGISTERS1 ((CPU)->registers1)
 #define GPR1     (&REGISTERS1[0])
 #define LO1      (REGISTERS1[32])
 #define HI1      (REGISTERS1[33])
 #define REGISTER_SA	(124)
 
   unsigned_word sa;        /* the shift amount register */
-#define SA ((STATE_CPU (sd, 0))->sa)
+#define SA ((CPU)->sa)
 
   /* end-sanitize-r5900 */
   /* start-sanitize-vr5400 */
@@ -546,7 +547,7 @@ struct sim_state {
 
   struct swatch watch;
 
-  sim_cpu cpu[1];
+  sim_cpu cpu[MAX_NR_PROCESSORS];
 #if (WITH_SMP)
 #define STATE_CPU(sd,n) (&(sd)->cpu[n])
 #else
@@ -639,32 +640,37 @@ struct sim_state {
    run-time errors in the simulator. */
 #define SimulatorFault      (0xFFFFFFFF)
 
-void signal_exception (SIM_DESC sd, address_word cia, int exception, ...);
-#define SignalException(exc,instruction)     signal_exception (sd, cia, (exc), (instruction))
-#define SignalExceptionInterrupt()           signal_exception (sd, NULL_CIA, Interrupt)
-#define SignalExceptionInstructionFetch()    signal_exception (sd, cia, InstructionFetch)
-#define SignalExceptionAddressStore()        signal_exception (sd, cia, AddressStore)
-#define SignalExceptionAddressLoad()         signal_exception (sd, cia, AddressLoad)
-#define SignalExceptionSimulatorFault(buf)   signal_exception (sd, cia, SimulatorFault, buf)
-#define SignalExceptionFPE()                 signal_exception (sd, cia, FPE)
-#define SignalExceptionIntegerOverflow()     signal_exception (sd, cia, IntegerOverflow)
-#define SignalExceptionCoProcessorUnusable() signal_exception (sd, cia, CoProcessorUnusable)
+void signal_exception (SIM_DESC sd, sim_cpu *cpu, address_word cia, int exception, ...);
+#define SignalException(exc,instruction)     signal_exception (SD, CPU, cia, (exc), (instruction))
+#define SignalExceptionInterrupt()           signal_exception (SD, CPU, NULL_CIA, Interrupt)
+#define SignalExceptionInstructionFetch()    signal_exception (SD, CPU, cia, InstructionFetch)
+#define SignalExceptionAddressStore()        signal_exception (SD, CPU, cia, AddressStore)
+#define SignalExceptionAddressLoad()         signal_exception (SD, CPU, cia, AddressLoad)
+#define SignalExceptionSimulatorFault(buf)   signal_exception (SD, CPU, cia, SimulatorFault, buf)
+#define SignalExceptionFPE()                 signal_exception (SD, CPU, cia, FPE)
+#define SignalExceptionIntegerOverflow()     signal_exception (SD, CPU, cia, IntegerOverflow)
+#define SignalExceptionCoProcessorUnusable() signal_exception (SD, CPU, cia, CoProcessorUnusable)
 
 
 /* Co-processor accesses */
 
-void cop_lw  PARAMS ((SIM_DESC sd, address_word cia, int coproc_num, int coproc_reg, unsigned int memword));
-void cop_ld  PARAMS ((SIM_DESC sd, address_word cia, int coproc_num, int coproc_reg, uword64 memword));
-unsigned int cop_sw PARAMS ((SIM_DESC sd, address_word cia, int coproc_num, int coproc_reg));
-uword64 cop_sd PARAMS ((SIM_DESC sd, address_word cia, int coproc_num, int coproc_reg));
+void cop_lw  PARAMS ((SIM_DESC sd, sim_cpu *cpu, address_word cia, int coproc_num, int coproc_reg, unsigned int memword));
+void cop_ld  PARAMS ((SIM_DESC sd, sim_cpu *cpu, address_word cia, int coproc_num, int coproc_reg, uword64 memword));
+unsigned int cop_sw PARAMS ((SIM_DESC sd, sim_cpu *cpu, address_word cia, int coproc_num, int coproc_reg));
+uword64 cop_sd PARAMS ((SIM_DESC sd, sim_cpu *cpu, address_word cia, int coproc_num, int coproc_reg));
 
-#define COP_LW(coproc_num,coproc_reg,memword) cop_lw(sd,cia,coproc_num,coproc_reg,memword)
-#define COP_LD(coproc_num,coproc_reg,memword) cop_ld(sd,cia,coproc_num,coproc_reg,memword)
-#define COP_SW(coproc_num,coproc_reg) cop_sw(sd,cia,coproc_num,coproc_reg)
-#define COP_SD(coproc_num,coproc_reg) cop_sd(sd,cia,coproc_num,coproc_reg)
+#define COP_LW(coproc_num,coproc_reg,memword) \
+cop_lw (SD, CPU, cia, coproc_num, coproc_reg, memword)
+#define COP_LD(coproc_num,coproc_reg,memword) \
+cop_ld (SD, CPU, cia, coproc_num, coproc_reg, memword)
+#define COP_SW(coproc_num,coproc_reg) \
+cop_sw (SD, CPU, cia, coproc_num, coproc_reg)
+#define COP_SD(coproc_num,coproc_reg) \
+cop_sd (SD, CPU, cia, coproc_num, coproc_reg)
 
-void decode_coproc PARAMS ((SIM_DESC sd, address_word cia, unsigned int instruction));
-#define DecodeCoproc(instruction) decode_coproc(sd, cia, (instruction))
+void decode_coproc PARAMS ((SIM_DESC sd, sim_cpu *cpu, address_word cia, unsigned int instruction));
+#define DecodeCoproc(instruction) \
+decode_coproc (SD, CPU, cia, (instruction))
 
 
 
@@ -701,31 +707,34 @@ void decode_coproc PARAMS ((SIM_DESC sd, address_word cia, unsigned int instruct
 #define AccessLength_DOUBLEWORD (7)
 #define AccessLength_QUADWORD   (15)
 
-int address_translation PARAMS ((SIM_DESC sd, address_word cia, address_word vAddr, int IorD, int LorS, address_word *pAddr, int *CCA, int raw));
+int address_translation PARAMS ((SIM_DESC sd, sim_cpu *, address_word cia, address_word vAddr, int IorD, int LorS, address_word *pAddr, int *CCA, int raw));
 #define AddressTranslation(vAddr,IorD,LorS,pAddr,CCA,host,raw) \
-address_translation(sd,cia,vAddr,IorD,LorS,pAddr,CCA,raw)
+address_translation (SD, CPU, cia, vAddr, IorD, LorS, pAddr, CCA, raw)
 
-void load_memory PARAMS ((SIM_DESC sd, address_word cia, uword64* memvalp, uword64* memval1p, int CCA, int AccessLength, address_word pAddr, address_word vAddr, int IorD));
+void load_memory PARAMS ((SIM_DESC sd, sim_cpu *cpu, address_word cia, uword64* memvalp, uword64* memval1p, int CCA, int AccessLength, address_word pAddr, address_word vAddr, int IorD));
 #define LoadMemory(memvalp,memval1p,CCA,AccessLength,pAddr,vAddr,IorD,raw) \
-load_memory(sd,cia,memvalp,memval1p,CCA,AccessLength,pAddr,vAddr,IorD)
+load_memory (SD, CPU, cia, memvalp, memval1p, CCA, AccessLength, pAddr, vAddr, IorD)
 
-void store_memory PARAMS ((SIM_DESC sd, address_word cia, int CCA, int AccessLength, uword64 MemElem, uword64 MemElem1, address_word pAddr, address_word vAddr));
+void store_memory PARAMS ((SIM_DESC sd, sim_cpu *cpu, address_word cia, int CCA, int AccessLength, uword64 MemElem, uword64 MemElem1, address_word pAddr, address_word vAddr));
 #define StoreMemory(CCA,AccessLength,MemElem,MemElem1,pAddr,vAddr,raw) \
-store_memory(sd,cia,CCA,AccessLength,MemElem,MemElem1,pAddr,vAddr)
+store_memory (SD, CPU, cia, CCA, AccessLength, MemElem, MemElem1, pAddr, vAddr)
 
-void cache_op PARAMS ((SIM_DESC sd, address_word cia, int op, address_word pAddr, address_word vAddr, unsigned int instruction));
-#define CacheOp(op,pAddr,vAddr,instruction) cache_op(sd,cia,op,pAddr,vAddr,instruction)
+void cache_op PARAMS ((SIM_DESC sd, sim_cpu *cpu, address_word cia, int op, address_word pAddr, address_word vAddr, unsigned int instruction));
+#define CacheOp(op,pAddr,vAddr,instruction) \
+cache_op (SD, CPU, cia, op, pAddr, vAddr, instruction)
 
-void sync_operation PARAMS ((SIM_DESC sd, address_word cia, int stype));
-#define SyncOperation(stype) sync_operation (sd, cia, (stype))
+void sync_operation PARAMS ((SIM_DESC sd, sim_cpu *cpu, address_word cia, int stype));
+#define SyncOperation(stype) \
+sync_operation (SD, CPU, cia, (stype))
 
-void prefetch PARAMS ((SIM_DESC sd, address_word cia, int CCA, address_word pAddr, address_word vAddr, int DATA, int hint));
-#define Prefetch(CCA,pAddr,vAddr,DATA,hint) prefetch(sd,cia,CCA,pAddr,vAddr,DATA,hint)
+void prefetch PARAMS ((SIM_DESC sd, sim_cpu *cpu, address_word cia, int CCA, address_word pAddr, address_word vAddr, int DATA, int hint));
+#define Prefetch(CCA,pAddr,vAddr,DATA,hint) \
+prefetch (SD, CPU, cia, CCA, pAddr, vAddr, DATA, hint)
 
-unsigned32 ifetch32 PARAMS ((SIM_DESC sd, address_word cia, address_word vaddr));
-#define IMEM(CIA) ifetch32 (SD, (CIA), (CIA))
+unsigned32 ifetch32 PARAMS ((SIM_DESC sd, sim_cpu *cpu, address_word cia, address_word vaddr));
+#define IMEM(CIA) ifetch32 (SD, CPU, (CIA), (CIA))
 
-void dotrace PARAMS ((SIM_DESC sd, FILE *tracefh, int type, SIM_ADDR address, int width, char *comment, ...));
+void dotrace PARAMS ((SIM_DESC sd, sim_cpu *cpu, FILE *tracefh, int type, SIM_ADDR address, int width, char *comment, ...));
 FILE *tracefh;
 
 #endif