[PATCH]: Support memory bank switching for 68HC12 simulator

[Stephane Carrez <stcarrez at nerim dot fr>]

Hi!

I've committed this patch to the HC11/HC12 simulator to support the
16K memory bank window at 0x8000.

	Stephane

2002-08-13  Stephane Carrez  <stcarrez@nerim.fr>

	* dv-m68hc11.c (m68hc11cpu_io_read_buffer): Translate memory
	bank window to some virtual address to read from extended memory.
	(m68hc11cpu_io_write_buffer): Likewise for writing.
	(attach_m68hc11_regs): When use_bank property is defined, attach
	to the 68HC12 16K memory bank window.
	* interp.c (sim_hw_configure): Create memory region for banked
	memory.


Index: dv-m68hc11.c
===================================================================
RCS file: /cvs/src/src/sim/m68hc11/dv-m68hc11.c,v
retrieving revision 1.8
diff -u -p -r1.8 dv-m68hc11.c
--- dv-m68hc11.c	13 Aug 2002 08:10:45 -0000	1.8
+++ dv-m68hc11.c	13 Aug 2002 08:27:08 -0000
@@ -321,6 +321,13 @@ attach_m68hc11_regs (struct hw *me,
       cpu->cpu_frequency = 8*1000*1000;
     }
 
+  if (hw_find_property (me, "use_bank") != NULL)
+    hw_attach_address (hw_parent (me), 0,
+                       exec_map,
+                       0x08000,
+                       0x04000,
+                       me);
+
   cpu_mode = "expanded";
   if (hw_find_property (me, "mode") != NULL)
     cpu_mode = hw_find_string_property (me, "mode");
@@ -836,6 +843,14 @@ m68hc11cpu_io_read_buffer (struct hw *me
   sd  = hw_system (me);
   cpu = STATE_CPU (sd, 0);
 
+  if (base >= 0x8000 && base < 0xc000)
+    {
+      address_word virt_addr = phys_to_virt (cpu, base);
+      if (virt_addr != base)
+        return sim_core_read_buffer (sd, cpu, space, dest,
+                                     virt_addr, nr_bytes);
+    }
+
   /* Handle reads for the sub-devices.  */
   base -= controller->attach_address;
   result = sim_core_read_buffer (sd, cpu,
@@ -1075,6 +1090,14 @@ m68hc11cpu_io_write_buffer (struct hw *m
 
   sd = hw_system (me); 
   cpu = STATE_CPU (sd, 0);  
+
+  if (base >= 0x8000 && base < 0xc000)
+    {
+      address_word virt_addr = phys_to_virt (cpu, base);
+      if (virt_addr != base)
+        return sim_core_write_buffer (sd, cpu, space, source,
+                                      virt_addr, nr_bytes);
+    }
   base -= controller->attach_address;
   result = sim_core_write_buffer (sd, cpu,
 				  io_map, source, base, nr_bytes);
Index: interp.c
===================================================================
RCS file: /cvs/src/src/sim/m68hc11/interp.c,v
retrieving revision 1.10
diff -u -p -r1.10 interp.c
--- interp.c	13 Aug 2002 08:10:45 -0000	1.10
+++ interp.c	13 Aug 2002 08:27:08 -0000
@@ -242,11 +242,14 @@ sim_hw_configure (SIM_DESC sd)
 	{
 	  /* Allocate core external memory.  */
 	  sim_do_commandf (sd, "memory region 0x%lx@%d,0x%lx",
-			   0x8000, M6811_RAM_LEVEL, 0x8000);
+			   0xC000, M6811_RAM_LEVEL, 0x4000);
 	  sim_do_commandf (sd, "memory region 0x000@%d,0x8000",
 			   M6811_RAM_LEVEL);
+	  sim_do_commandf (sd, "memory region 0x01000000@%d,0x100000",
+			   M6811_RAM_LEVEL);
 
 	  sim_hw_parse (sd, "/m68hc12/reg 0x0 0x3FF");
+	  sim_hw_parse (sd, "/m68hc12/use_bank 1");
 	}
 
       if (!hw_tree_find_property (device_tree, "/m68hc12/m68hc12sio@1/reg"))