* Makefile.in, config.in, configure, configure.in: New files.

        * gencode.c, interp.c, mn10300_sim.h, simops.c: New files.

Skeleton mn10300 simulator

1 files changed, 394 insertions, 0 deletions

diff --git a/sim/mn10300/interp.c b/sim/mn10300/interp.c
new file mode 100644
index 0000000..cf0d713
--- /dev/null
+++ b/sim/mn10300/interp.c
@@ -0,0 +1,394 @@
+#include <signal.h>
+#include "sysdep.h"
+#include "bfd.h"
+
+#include "mn10300_sim.h"
+
+#ifndef INLINE
+#ifdef __GNUC__
+#define INLINE inline
+#else
+#define INLINE
+#endif
+#endif
+
+host_callback *mn10300_callback;
+int mn10300_debug;
+
+uint32 OP[4];
+
+static struct hash_entry *lookup_hash PARAMS ((uint32 ins));
+static long hash PARAMS ((long));
+static void init_system PARAMS ((void));
+
+#define MAX_HASH  63
+
+struct hash_entry
+{
+  struct hash_entry *next;
+  long opcode;
+  long mask;
+  struct simops *ops;
+};
+
+struct hash_entry hash_table[MAX_HASH+1];
+
+
+static INLINE long 
+hash(insn)
+     long insn;
+{
+/* XXX */
+}
+
+static struct hash_entry *
+lookup_hash (ins)
+     uint32 ins;
+{
+  struct hash_entry *h;
+
+  h = &hash_table[hash(ins)];
+
+  while ((ins & h->mask) != h->opcode)
+    {
+      if (h->next == NULL)
+	{
+	  (*mn10300_callback->printf_filtered) (mn10300_callback, "ERROR looking up hash for 0x%x, PC=0x%x\n", ins, PC);
+	  exit(1);
+	}
+      h = h->next;
+    }
+  return (h);
+}
+
+/* FIXME These would more efficient to use than load_mem/store_mem,
+   but need to be changed to use the memory map.  */
+
+uint8
+get_byte (x)
+     uint8 *x;
+{
+  return *x;
+}
+
+uint16
+get_half (x)
+     uint8 *x;
+{
+  uint8 *a = x;
+  return (a[1] << 8) + (a[0]);
+}
+
+uint32
+get_word (x)
+      uint8 *x;
+{
+  uint8 *a = x;
+  return (a[3]<<24) + (a[2]<<16) + (a[1]<<8) + (a[0]);
+}
+
+void
+put_byte (addr, data)
+     uint8 *addr;
+     uint8 data;
+{
+  uint8 *a = addr;
+  a[0] = data;
+}
+
+void
+put_half (addr, data)
+     uint8 *addr;
+     uint16 data;
+{
+  uint8 *a = addr;
+  a[0] = data & 0xff;
+  a[1] = (data >> 8) & 0xff;
+}
+
+void
+put_word (addr, data)
+     uint8 *addr;
+     uint32 data;
+{
+  uint8 *a = addr;
+  a[0] = data & 0xff;
+  a[1] = (data >> 8) & 0xff;
+  a[2] = (data >> 16) & 0xff;
+  a[3] = (data >> 24) & 0xff;
+}
+
+
+uint32
+load_mem (addr, len)
+     SIM_ADDR addr;
+     int len;
+{
+  uint8 *p = addr + State.mem;
+
+  switch (len)
+    {
+    case 1:
+      return p[0];
+    case 2:
+      return p[1] << 8 | p[0];
+    case 4:
+      return p[3] << 24 | p[2] << 16 | p[1] << 8 | p[0];
+    default:
+      abort ();
+    }
+}
+
+void
+store_mem (addr, len, data)
+     SIM_ADDR addr;
+     int len;
+     uint32 data;
+{
+  uint8 *p = addr + State.mem;
+
+  switch (len)
+    {
+    case 1:
+      p[0] = data;
+      return;
+    case 2:
+      p[0] = data;
+      p[1] = data >> 8;
+      return;
+    case 4:
+      p[0] = data;
+      p[1] = data >> 8;
+      p[2] = data >> 16;
+      p[3] = data >> 24;
+      return;
+    default:
+      abort ();
+    }
+}
+
+void
+sim_size (power)
+     int power;
+
+{
+  if (State.mem)
+    free (State.mem);
+
+  State.mem = (uint8 *) calloc (1,  1 << power);
+  if (!State.mem)
+    {
+      (*mn10300_callback->printf_filtered) (mn10300_callback, "Allocation of main memory failed.\n");
+      exit (1);
+    }
+}
+
+static void
+init_system ()
+{
+  if (!State.mem)
+    sim_size(18);
+}
+
+int
+sim_write (addr, buffer, size)
+     SIM_ADDR addr;
+     unsigned char *buffer;
+     int size;
+{
+  int i;
+
+  init_system ();
+
+  for (i = 0; i < size; i++)
+    store_mem (addr + i, 1, buffer[i]);
+
+  return size;
+}
+
+void
+sim_open (args)
+     char *args;
+{
+  struct simops *s;
+  struct hash_entry *h;
+  if (args != NULL)
+    {
+#ifdef DEBUG
+      if (strcmp (args, "-t") == 0)
+	mn10300_debug = DEBUG;
+      else
+#endif
+	(*mn10300_callback->printf_filtered) (mn10300_callback, "ERROR: unsupported option(s): %s\n",args);
+    }
+
+  /* put all the opcodes in the hash table */
+  for (s = Simops; s->func; s++)
+    {
+      h = &hash_table[hash(s->opcode)];
+      
+      /* go to the last entry in the chain */
+      while (h->next)
+	  h = h->next;
+
+      if (h->ops)
+	{
+	  h->next = calloc(1,sizeof(struct hash_entry));
+	  h = h->next;
+	}
+      h->ops = s;
+      h->mask = s->mask;
+      h->opcode = s->opcode;
+    }
+}
+
+
+void
+sim_close (quitting)
+     int quitting;
+{
+  /* nothing to do */
+}
+
+void
+sim_set_profile (n)
+     int n;
+{
+  (*mn10300_callback->printf_filtered) (mn10300_callback, "sim_set_profile %d\n", n);
+}
+
+void
+sim_set_profile_size (n)
+     int n;
+{
+  (*mn10300_callback->printf_filtered) (mn10300_callback, "sim_set_profile_size %d\n", n);
+}
+
+void
+sim_resume (step, siggnal)
+     int step, siggnal;
+{
+  uint32 inst, opcode;
+  reg_t oldpc;
+  struct interrupt_generator *intgen;
+
+  if (step)
+    State.exception = SIGTRAP;
+  else
+    State.exception = 0;
+
+  do
+    {
+      /* Fetch the current instruction.  */
+      inst = RLW (PC);
+      oldpc = PC;
+      opcode = (inst & 0x07e0) >> 5;
+
+      /* Decode the opcode field. */
+      if ((opcode & 0x30) == 0
+	  || (opcode & 0x38) == 0x10)
+	{
+	}
+    }
+  while (!State.exception);
+}
+
+int
+sim_trace ()
+{
+#ifdef DEBUG
+  mn10300_debug = DEBUG;
+#endif
+  sim_resume (0, 0);
+  return 1;
+}
+
+void
+sim_info (verbose)
+     int verbose;
+{
+  (*mn10300_callback->printf_filtered) (mn10300_callback, "sim_info\n");
+}
+
+void
+sim_create_inferior (start_address, argv, env)
+     SIM_ADDR start_address;
+     char **argv;
+     char **env;
+{
+  PC = start_address;
+}
+
+void
+sim_kill ()
+{
+  /* nothing to do */
+}
+
+void
+sim_set_callbacks (p)
+     host_callback *p;
+{
+  mn10300_callback = p;
+}
+
+/* All the code for exiting, signals, etc needs to be revamped.
+
+   This is enough to get c-torture limping though.  */
+
+void
+sim_stop_reason (reason, sigrc)
+     enum sim_stop *reason;
+     int *sigrc;
+{
+  *reason = sim_stopped;
+  if (State.exception == SIGQUIT)
+    *sigrc = 0;
+  else
+    *sigrc = State.exception;
+}
+
+void
+sim_fetch_register (rn, memory)
+     int rn;
+     unsigned char *memory;
+{
+  put_word (memory, State.regs[rn]);
+}
+ 
+void
+sim_store_register (rn, memory)
+     int rn;
+     unsigned char *memory;
+{
+  State.regs[rn] = get_word (memory);
+}
+
+int
+sim_read (addr, buffer, size)
+     SIM_ADDR addr;
+     unsigned char *buffer;
+     int size;
+{
+  int i;
+  for (i = 0; i < size; i++)
+    buffer[i] = load_mem (addr + i, 1);
+
+  return size;
+} 
+
+void
+sim_do_command (cmd)
+     char *cmd;
+{
+  (*mn10300_callback->printf_filtered) (mn10300_callback, "\"%s\" is not a valid mn10300 simulator command.\n", cmd);
+}
+
+int
+sim_load (prog, from_tty)
+     char *prog;
+     int from_tty;
+{
+  /* Return nonzero so GDB will handle it.  */
+  return 1;
+}