* ChangeLog, Makefile.in, configure, configure.in, v850_sim.h,

        gencode.c, interp.c, simops.c: Created.
So we've got something to hack on.

1 files changed, 423 insertions, 0 deletions

diff --git a/sim/v850/interp.c b/sim/v850/interp.c
new file mode 100644
index 0000000..0e9d102
--- /dev/null
+++ b/sim/v850/interp.c
@@ -0,0 +1,423 @@
+#include <signal.h>
+#include "sysdep.h"
+#include "bfd.h"
+#include "remote-sim.h"
+#include "callback.h"
+
+#include "v850_sim.h"
+
+#define IMEM_SIZE 18	/* V850 instruction memory size is 18 bits */
+#define DMEM_SIZE 16	/* Data memory */
+
+uint16 OP[4];
+
+static struct hash_entry *lookup_hash PARAMS ((uint32 ins));
+
+#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 long 
+hash(insn)
+     long insn;
+{
+  /* XXX This isn't right for 32bit opcodes, hell it isn't even
+     right for 16bit opcodes!  */
+  if (insn & 0x0600)
+    return ((insn & 0x3F000000) >> 24);
+  else
+    return((insn & 0x07E0) >> 5);
+}
+
+static struct hash_entry *
+lookup_hash (ins)
+     uint32 ins;
+{
+  struct hash_entry *h;
+
+  if (ins & 0x0f00)
+    h = &hash_table[(ins & 0x3F000000) >> 24];
+  else
+    h = &hash_table[(ins & 0x07E0) >> 5];
+
+  while ( (ins & h->mask) != h->opcode)
+    {
+      if (h->next == NULL)
+	{
+	  printf ("ERROR looking up hash for %x\n",ins);
+	  exit(1);
+	}
+      h = h->next;
+    }
+  return (h);
+}
+
+uint32
+get_longword_swap (x)
+      uint16 x;
+{
+  uint8 *a = (uint8 *)(x + State.imem);
+  return (a[0]<<24) + (a[1]<<16) + (a[2]<<8) + (a[3]);
+}
+
+uint16
+get_word_swap (x)
+      uint16 x;
+{
+  uint8 *a = (uint8 *)(x + State.imem);
+  return (a[0]<<8) + a[1];
+}
+
+void
+write_word_swap (addr, data)
+     uint16 addr, data;
+{
+  uint8 *a = (uint8 *)(addr + State.imem);
+  a[0] = data >> 8;
+  a[1] = data & 0xff;
+}
+
+static void
+do_format_1 (insn)
+     uint32 insn;
+{
+  printf("format 1 0x%x\n", insn >> 16);
+}
+
+static void
+do_format_2 (insn)
+     uint32 insn;
+{
+  printf("format 2 0x%x\n", insn >> 16);
+}
+
+static void
+do_format_3 (insn)
+     uint32 insn;
+{
+  printf("format 3 0x%x\n", insn >> 16);
+}
+
+static void
+do_format_4 (insn)
+     uint32 insn;
+{
+  printf("format 4 0x%x\n", insn >> 16);
+}
+
+static void
+do_format_5 (insn)
+     uint32 insn;
+{
+  printf("format 5 0x%x\n", insn);
+}
+
+static void
+do_format_6 (insn)
+     uint32 insn;
+{
+  printf("format 6 0x%x\n", insn);
+}
+
+static void
+do_format_7 (insn)
+     uint32 insn;
+{
+  printf("format 7 0x%x\n", insn);
+}
+
+static void
+do_format_8 (insn)
+     uint32 insn;
+{
+  printf("format 8 0x%x\n", insn);
+}
+
+static void
+do_formats_9_10 (insn)
+     uint32 insn;
+{
+  printf("formats 9 and 10 0x%x\n", insn);
+}
+
+void
+sim_size (power)
+     int power;
+
+{
+  if (State.imem)
+    {
+      free (State.imem);
+      free (State.dmem);
+    }
+
+  State.imem = (uint8 *)calloc(1,1<<IMEM_SIZE);
+  State.dmem = (uint8 *)calloc(1,1<<DMEM_SIZE);
+  if (!State.imem || !State.dmem )
+    {
+      fprintf (stderr,"Memory allocation failed.\n");
+      exit(1);
+    }
+  printf ("Allocated %d bytes instruction memory and\n",1<<IMEM_SIZE);
+  printf ("          %d bytes data memory.\n",1<<DMEM_SIZE);
+}
+
+static void
+init_system ()
+{
+  if (!State.imem)
+    sim_size(1);
+}
+
+int
+sim_write (addr, buffer, size)
+     SIM_ADDR addr;
+     unsigned char *buffer;
+     int size;
+{
+  int i;
+  init_system ();
+
+  /* printf ("sim_write %d bytes to 0x%x\n",size,addr); */
+  for (i = 0; i < size; i++)
+    {
+      State.imem[i+addr] = buffer[i]; 
+    }
+  return size;
+}
+
+void
+sim_open (args)
+     char *args;
+{
+  struct simops *s;
+  struct hash_entry *h, *prev;
+  if (args != NULL)
+      printf ("sim_open %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;
+{
+  printf ("sim_set_profile %d\n",n);
+}
+
+void
+sim_set_profile_size (n)
+     int n;
+{
+  printf ("sim_set_profile_size %d\n",n);
+}
+
+void
+sim_resume (step, siggnal)
+     int step, siggnal;
+{
+  uint32 inst, opcode;
+  int i;
+  reg_t oldpc;
+
+/*   printf ("sim_resume (%d,%d)  PC=0x%x\n",step,siggnal,PC); */
+
+ if (step)
+   State.exception = SIGTRAP;
+ else
+   State.exception = 0;
+ 
+ do
+   {
+     inst = RLW (PC);
+     oldpc = PC;
+     opcode = (inst & 0x07e00000) >> 21;
+     if ((opcode & 0x30) == 0)
+       {
+	 do_format_1 (inst >> 16);
+	 PC += 2;
+       }
+     else if ((opcode & 0x38) == 0x10)
+       {
+	 do_format_2 (inst >> 16);
+	 PC += 2;
+       }
+     else if ((opcode & 0x3C) == 0x18
+	      || (opcode & 0x3C) == 0x1C
+	      || (opcode & 0x3C) == 0x20
+	      || (opcode & 0x3C) == 0x24
+	      || (opcode & 0x3C) == 0x28)
+       {
+	 do_format_4 (inst >> 16);
+	 PC += 2;
+       }
+     else if ((opcode& 0x3C) == 0x23)
+       {
+	 do_format_3 (inst >> 16);
+	 PC += 2;
+       }
+     else if ((opcode & 0x38) == 0x30)
+       {
+	 do_format_6 (inst);
+	 PC += 4;
+       }
+     else if ((opcode & 0x3C) == 0x38)
+       {
+	 do_format_7 (inst);
+	 PC += 4;
+       }
+     else if ((opcode & 0x3E) == 0x3C)
+       {
+	 do_format_5 (inst);
+	 PC += 4;
+       }
+     else if ((opcode & 0x3E) == 0x3C)
+       {
+	 do_format_8 (inst);
+	 PC += 4;
+       }
+     else
+       {
+	 do_formats_9_10 (inst);
+	 PC += 4;
+       }
+   } 
+ while (!State.exception);
+}
+
+int
+sim_trace ()
+{
+  printf ("sim_trace\n");
+  return 0;
+}
+
+void
+sim_info (verbose)
+     int verbose;
+{
+  printf ("sim_info\n");
+}
+
+void
+sim_create_inferior (start_address, argv, env)
+     SIM_ADDR start_address;
+     char **argv;
+     char **env;
+{
+  printf ("sim_create_inferior:  PC=0x%x\n",start_address);
+  PC = start_address;
+}
+
+
+void
+sim_kill ()
+{
+  /* nothing to do */
+}
+
+void
+sim_set_callbacks(p)
+     host_callback *p;
+{
+  printf ("sim_set_callbacks\n");
+  /* callback = p; */
+}
+
+void
+sim_stop_reason (reason, sigrc)
+     enum sim_stop *reason;
+     int *sigrc;
+{
+/*   printf ("sim_stop_reason:  PC=0x%x\n",PC); */
+
+  if (State.exception == SIGQUIT)
+    {
+      *reason = sim_exited;
+      *sigrc = State.exception;
+    }
+  else
+    {
+      *reason = sim_stopped;
+      *sigrc = State.exception;
+    } 
+}
+
+void
+sim_fetch_register (rn, memory)
+     int rn;
+     unsigned char *memory;
+{
+  *(uint32 *)memory = State.regs[rn];
+  /* printf ("sim_fetch_register %d 0x%x\n",rn,State.regs[rn]); */
+}
+ 
+void
+sim_store_register (rn, memory)
+     int rn;
+     unsigned char *memory;
+{
+  State.regs[rn]= *(uint32 *)memory;
+  /* printf ("store: r%d=0x%x\n",rn,State.regs[rn]); */
+}
+
+sim_read (addr, buffer, size)
+     SIM_ADDR addr;
+     unsigned char *buffer;
+     int size;
+{
+  int i;
+  for (i = 0; i < size; i++)
+    {
+      buffer[i] = State.imem[addr + i];
+    }
+  return size;
+} 
+
+void
+sim_do_command (cmd)
+     char *cmd;
+{ 
+  printf("sim_do_command: %s\n",cmd);
+}
+
+int
+sim_load (prog, from_tty)
+     char *prog;
+     int from_tty;
+{
+  /* Return nonzero so GDB will handle it.  */
+  return 1;
+}