From 794ec90983750924612c3f4de3b954b22c8ff566 Mon Sep 17 00:00:00 2001
From: aoliva <aoliva>
Date: Tue, 4 Jul 2000 07:18:18 +0000
Subject: [PATCH] * armdefs.h (struct ARMul_State): Add is_StrongARM.
 (ARM_Strong_Prop, STRONGARM): Define. * arminit.c (ARMul_NewState): Reset
 is_StrongARM. (ARMul_SelectProcessor): Set is_StrongARM. * wrapper.c
 (sim_create_inferior): Use bfd machine type to determine processor type to
 emulate. * armemu.h (BUSUSEDINCPCS, BUSUSEDINCPCN): Don't increment PC when
 emulating StrongARM.

---
 sim/arm/ChangeLog |  9 +++++++++
 sim/arm/armdefs.h |  4 ++++
 sim/arm/armemu.h  | 12 ++++++++----
 sim/arm/arminit.c |  4 ++++
 sim/arm/wrapper.c | 41 ++++++++++++++++++++++++++++++++++-------
 5 files changed, 59 insertions(+), 11 deletions(-)

diff --git a/sim/arm/ChangeLog b/sim/arm/ChangeLog
index bdc2f36302..b4ab3a4f79 100644
--- a/sim/arm/ChangeLog
+++ b/sim/arm/ChangeLog
@@ -1,5 +1,14 @@
 2000-07-04  Alexandre Oliva  <aoliva@redhat.com>
 
+	* armdefs.h (struct ARMul_State): Add is_StrongARM.
+	(ARM_Strong_Prop, STRONGARM): Define.
+	* arminit.c (ARMul_NewState): Reset is_StrongARM.
+	(ARMul_SelectProcessor): Set is_StrongARM.
+	* wrapper.c (sim_create_inferior): Use bfd machine type to
+	determine processor type to emulate.
+	* armemu.h (BUSUSEDINCPCS, BUSUSEDINCPCN): Don't increment PC
+	when emulating StrongARM.
+
 	* armemu.c (ARMul_Emulate, t_undefined): Proceed to next insn.
 
 	* armemu.h (INSN_SIZE): New macro.
diff --git a/sim/arm/armdefs.h b/sim/arm/armdefs.h
index d08a94c4e6..72dae0a6dd 100644
--- a/sim/arm/armdefs.h
+++ b/sim/arm/armdefs.h
@@ -123,6 +123,8 @@ struct ARMul_State
 
   const struct Dbg_HostosInterface *hostif;
 
+  unsigned is_StrongARM;	/* Are we emulating a StrongARM? */
+
   int verbose;			/* non-zero means print various messages like the banner */
 };
 
@@ -146,6 +148,7 @@ struct ARMul_State
 #define ARM_Debug_Prop   0x10
 #define ARM_Isync_Prop   ARM_Debug_Prop
 #define ARM_Lock_Prop    0x20
+#define ARM_Strong_Prop  0x40
 
 /* ARM2 family */
 #define ARM2    (ARM_Fix26_Prop)
@@ -164,6 +167,7 @@ struct ARMul_State
 #define ARM610  ARM6
 #define ARM620  ARM6
 
+#define STRONGARM (ARM_Strong_Prop)
 
 /***************************************************************************\
 *                   Macros to extract instruction fields                    *
diff --git a/sim/arm/armemu.h b/sim/arm/armemu.h
index de836cb4c7..7bca8d3f2f 100644
--- a/sim/arm/armemu.h
+++ b/sim/arm/armemu.h
@@ -231,10 +231,14 @@ extern ARMword isize;
 
 #define NORMALCYCLE state->NextInstr = 0
 #define BUSUSEDN state->NextInstr |= 1	/* the next fetch will be an N cycle */
-#define BUSUSEDINCPCS state->Reg[15] += isize ; /* a standard PC inc and an S cycle */ \
-                      state->NextInstr = (state->NextInstr & 0xff) | 2
-#define BUSUSEDINCPCN state->Reg[15] += isize ; /* a standard PC inc and an N cycle */ \
-                      state->NextInstr |= 3
+#define BUSUSEDINCPCS do { if (! state->is_StrongARM) { \
+			state->Reg[15] += isize ; /* a standard PC inc and an S cycle */ \
+			state->NextInstr = (state->NextInstr & 0xff) | 2; \
+		      } } while (0)
+#define BUSUSEDINCPCN do { if (state->is_StrongARM) BUSUSEDN; else { \
+			state->Reg[15] += isize ; /* a standard PC inc and an N cycle */ \
+			state->NextInstr |= 3; \
+		      } } while (0)
 #define INCPC state->Reg[15] += isize ; /* a standard PC inc */ \
               state->NextInstr |= 2
 #define FLUSHPIPE state->NextInstr |= PRIMEPIPE
diff --git a/sim/arm/arminit.c b/sim/arm/arminit.c
index 66e6dad7af..3ee4c69820 100644
--- a/sim/arm/arminit.c
+++ b/sim/arm/arminit.c
@@ -124,6 +124,8 @@ ARMul_NewState (void)
   state->lateabtSig = LOW;
   state->bigendSig = LOW;
 
+  state->is_StrongARM = LOW;
+
   ARMul_Reset (state);
   return (state);
 }
@@ -147,6 +149,8 @@ ARMul_SelectProcessor (ARMul_State * state, unsigned processor)
     }
 
   state->lateabtSig = LOW;
+
+  state->is_StrongARM = (processor & ARM_Strong_Prop) ? HIGH : LOW;
 }
 
 /***************************************************************************\
diff --git a/sim/arm/wrapper.c b/sim/arm/wrapper.c
index 8fca85df14..5db178c47c 100644
--- a/sim/arm/wrapper.c
+++ b/sim/arm/wrapper.c
@@ -1,5 +1,5 @@
 /* run front end support for arm
-   Copyright (C) 1995, 1996, 1997 Free Software Foundation, Inc.
+   Copyright (C) 1995, 1996, 1997, 2000 Free Software Foundation, Inc.
 
 This file is part of ARM SIM.
 
@@ -198,6 +198,7 @@ sim_create_inferior (sd, abfd, argv, env)
      char **env;
 {
   int argvlen = 0;
+  int mach;
   char **arg;
 
   if (abfd != NULL)
@@ -205,12 +206,38 @@ sim_create_inferior (sd, abfd, argv, env)
   else
     ARMul_SetPC (state, 0);	/* ??? */
 
-  /* We explicitly select a processor capable of supporting the ARM
-     32bit mode.  JGS  */
-  ARMul_SelectProcessor (state, ARM600);
-  /* And then we force the simulated CPU into the 32bit User mode.  */
-  ARMul_SetCPSR (state, USER32MODE);
-
+  mach = bfd_get_mach (abfd);
+
+  switch (mach) {
+  default:
+    (*sim_callback->printf_filtered) (sim_callback,
+				      "Unknown machine type; please update sim_create_inferior.\n");
+    /* fall through */
+
+  case 0: /* arm */
+    /* We wouldn't set the machine type with earlier toolchains, so we
+       explicitly select a processor capable of supporting all ARM
+       32bit mode. */
+    /* fall through */
+
+  case 5: /* armv4 */
+  case 6: /* armv4t */
+  case 7: /* armv5 */
+  case 8: /* armv5t */
+    ARMul_SelectProcessor (state, STRONGARM);
+    break;
+
+  case 3: /* armv3 */
+  case 4: /* armv3m */
+    ARMul_SelectProcessor (state, ARM600);
+    break;
+    
+  case 1: /* armv2 */
+  case 2: /* armv2a */
+    ARMul_SelectProcessor (state, ARM2);
+    break;
+  }
+    
   if (argv != NULL)
     {
       /*
-- 
2.11.0