Added Files:

  ChangeLog config.in configure configure.ac cr16_sim.h endian.c
  gencode.c interp.c Makefile.in simops.c: Add these file for CR16 target simulator.

1 files changed, 473 insertions, 0 deletions

diff --git a/sim/cr16/cr16_sim.h b/sim/cr16/cr16_sim.h
new file mode 100644
index 0000000..19922f6
--- /dev/null
+++ b/sim/cr16/cr16_sim.h
@@ -0,0 +1,473 @@
+/* Simulation code for the CR16 processor.
+   Copyright (C) 2008 Free Software Foundation, Inc.
+   Contributed by M Ranga Swami Reddy <MR.Swami.Reddy@nsc.com>
+
+   This file is part of GDB, the GNU debugger.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3, or (at your option)
+   any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+ 
+   You should have received a copy of the GNU General Public License along
+   with this program. If not, see <http://www.gnu.org/licenses/>.  */
+
+#include "config.h"
+#include <stdio.h>
+#include <ctype.h>
+#include <limits.h>
+#include "ansidecl.h"
+#include "gdb/callback.h"
+#include "opcode/cr16.h"
+#include "bfd.h"
+
+#define DEBUG_TRACE		0x00000001
+#define DEBUG_VALUES		0x00000002
+#define DEBUG_LINE_NUMBER	0x00000004
+#define DEBUG_MEMSIZE		0x00000008
+#define DEBUG_INSTRUCTION	0x00000010
+#define DEBUG_TRAP		0x00000020
+#define DEBUG_MEMORY		0x00000040
+
+#ifndef	DEBUG
+#define	DEBUG (DEBUG_TRACE | DEBUG_VALUES | DEBUG_LINE_NUMBER)
+#endif
+
+extern int cr16_debug;
+
+#include "gdb/remote-sim.h"
+#include "sim-config.h"
+#include "sim-types.h"
+
+typedef unsigned8 uint8;
+typedef signed8 int8;
+typedef unsigned16 uint16;
+typedef signed16 int16;
+typedef unsigned32 uint32;
+typedef signed32 int32;
+typedef unsigned64 uint64;
+typedef signed64 int64;
+
+/* FIXME: CR16 defines */
+typedef uint16 reg_t;
+typedef uint32 creg_t;
+
+struct simops 
+{
+  char mnimonic[6];
+  int  size; // size
+  long mask;
+  long opcode;
+  int format;
+  char fname[10];
+  void (*func)();
+  int numops;
+  int operands[4];
+};
+
+enum _ins_type
+{
+   INS_UNKNOWN,			/* unknown instruction */
+   INS_NO_TYPE_INS,
+   INS_ARITH_INS,
+   INS_LD_STOR_INS,
+   INS_BRANCH_INS,
+   INS_ARITH_BYTE_INS,
+   INS_SHIFT_INS,
+   INS_BRANCH_NEQ_INS,
+   INS_STOR_IMM_INS, 
+   INS_CSTBIT_INS, 
+   INS_MAX
+};
+
+extern unsigned long ins_type_counters[ (int)INS_MAX ];
+
+enum {
+  SP_IDX = 15,
+};
+
+/* Write-back slots */
+union slot_data {
+  unsigned_1 _1;
+  unsigned_2 _2;
+  unsigned_4 _4;
+};
+struct slot {
+  void *dest;
+  int size;
+  union slot_data data;
+  union slot_data mask;
+};
+enum {
+ NR_SLOTS = 16
+};
+#define SLOT (State.slot)
+#define SLOT_NR (State.slot_nr)
+#define SLOT_PEND_MASK(DEST, MSK, VAL) \
+  do \
+    { \
+      SLOT[SLOT_NR].dest = &(DEST); \
+      SLOT[SLOT_NR].size = sizeof (DEST); \
+      switch (sizeof (DEST)) \
+        { \
+        case 1: \
+          SLOT[SLOT_NR].data._1 = (unsigned_1) (VAL); \
+          SLOT[SLOT_NR].mask._1 = (unsigned_1) (MSK); \
+          break; \
+        case 2: \
+          SLOT[SLOT_NR].data._2 = (unsigned_2) (VAL); \
+          SLOT[SLOT_NR].mask._2 = (unsigned_2) (MSK); \
+          break; \
+        case 4: \
+          SLOT[SLOT_NR].data._4 = (unsigned_4) (VAL); \
+          SLOT[SLOT_NR].mask._4 = (unsigned_4) (MSK); \
+          break; \
+        } \
+      SLOT_NR = (SLOT_NR + 1); \
+    } \
+  while (0)
+#define SLOT_PEND(DEST, VAL) SLOT_PEND_MASK(DEST, 0, VAL)
+#define SLOT_DISCARD() (SLOT_NR = 0)
+#define SLOT_FLUSH() \
+  do \
+    { \
+      int i; \
+      for (i = 0; i < SLOT_NR; i++) \
+	{ \
+	  switch (SLOT[i].size) \
+	    { \
+	    case 1: \
+	      *(unsigned_1*) SLOT[i].dest &= SLOT[i].mask._1; \
+	      *(unsigned_1*) SLOT[i].dest |= SLOT[i].data._1; \
+	      break; \
+	    case 2: \
+	      *(unsigned_2*) SLOT[i].dest &= SLOT[i].mask._2; \
+	      *(unsigned_2*) SLOT[i].dest |= SLOT[i].data._2; \
+	      break; \
+	    case 4: \
+	      *(unsigned_4*) SLOT[i].dest &= SLOT[i].mask._4; \
+	      *(unsigned_4*) SLOT[i].dest |= SLOT[i].data._4; \
+	      break; \
+	    } \
+        } \
+      SLOT_NR = 0; \
+    } \
+  while (0)
+#define SLOT_DUMP() \
+  do \
+    { \
+      int i; \
+      for (i = 0; i < SLOT_NR; i++) \
+	{ \
+	  switch (SLOT[i].size) \
+	    { \
+	    case 1: \
+              printf ("SLOT %d *0x%08lx & 0x%02x | 0x%02x\n", i, \
+		      (long) SLOT[i].dest, \
+                      (unsigned) SLOT[i].mask._1, \
+                      (unsigned) SLOT[i].data._1); \
+	      break; \
+	    case 2: \
+              printf ("SLOT %d *0x%08lx & 0x%04x | 0x%04x\n", i, \
+		      (long) SLOT[i].dest, \
+                      (unsigned) SLOT[i].mask._2, \
+                      (unsigned) SLOT[i].data._2); \
+	      break; \
+	    case 4: \
+              printf ("SLOT %d *0x%08lx & 0x%08x | 0x%08x\n", i, \
+		      (long) SLOT[i].dest, \
+                      (unsigned) SLOT[i].mask._4, \
+                      (unsigned) SLOT[i].data._4); \
+	      break; \
+	    case 8: \
+              printf ("SLOT %d *0x%08lx & 0x%08x%08x | 0x%08x%08x\n", i, \
+		      (long) SLOT[i].dest, \
+                      (unsigned) (SLOT[i].mask._8 >> 32),  \
+                      (unsigned) SLOT[i].mask._8, \
+                      (unsigned) (SLOT[i].data._8 >> 32),  \
+                      (unsigned) SLOT[i].data._8); \
+	      break; \
+	    } \
+        } \
+    } \
+  while (0)
+
+/* cr16 memory: There are three separate cr16 memory regions IMEM,
+   UMEM and DMEM.  The IMEM and DMEM are further broken down into
+   blocks (very like VM pages). */
+
+enum
+{
+  IMAP_BLOCK_SIZE = 0x2000000,
+  DMAP_BLOCK_SIZE = 0x4000000
+};
+
+/* Implement the three memory regions using sparse arrays.  Allocate
+   memory using ``segments''.  A segment must be at least as large as
+   a BLOCK - ensures that an access that doesn't cross a block
+   boundary can't cross a segment boundary */
+
+enum
+{
+  SEGMENT_SIZE = 0x2000000, /* 128KB - MAX(IMAP_BLOCK_SIZE,DMAP_BLOCK_SIZE) */
+  IMEM_SEGMENTS = 8, /* 1MB */
+  DMEM_SEGMENTS = 8, /* 1MB */
+  UMEM_SEGMENTS = 128 /* 16MB */
+};
+
+struct cr16_memory
+{
+  uint8 *insn[IMEM_SEGMENTS];
+  uint8 *data[DMEM_SEGMENTS];
+  uint8 *unif[UMEM_SEGMENTS];
+  uint8 fault[16];
+};
+
+struct _state
+{
+  creg_t regs[16];		/* general-purpose registers */
+#define GPR(N) (State.regs[(N)] + 0)
+#define SET_GPR(N,VAL) (State.regs[(N)] = (VAL))
+
+#define GPR32(N) \
+     (N < 12) ? \
+     ((((uint16) State.regs[(N) + 1]) << 16) | (uint16) State.regs[(N)]) \
+     : GPR (N) 
+
+#define SET_GPR32(N,VAL) do { \
+     if (N < 11)  \
+       { SET_GPR (N + 1, (VAL) >> 16); SET_GPR (N, ((VAL) & 0xffff));} \
+     else { if ( N == 11) \
+             { SET_GPR (N + 1, ((GPR32 (12)) & 0xffff0000)|((VAL) >> 16)); \
+	       SET_GPR (N, ((VAL) & 0xffff));} \
+            else SET_GPR (N, (VAL));} \
+    } while (0)
+
+  creg_t cregs[16];		/* control registers */
+#define CREG(N) (State.cregs[(N)] + 0)
+#define SET_CREG(N,VAL) move_to_cr ((N), 0, (VAL), 0)
+#define SET_HW_CREG(N,VAL) move_to_cr ((N), 0, (VAL), 1)
+
+  reg_t sp[2];                  /* holding area for SPI(0)/SPU(1) */
+#define HELD_SP(N) (State.sp[(N)] + 0)
+#define SET_HELD_SP(N,VAL) SLOT_PEND (State.sp[(N)], (VAL))
+
+  /* writeback info */
+  struct slot slot[NR_SLOTS];
+  int slot_nr;
+
+  /* trace data */
+  struct {
+    uint16 psw;
+  } trace;
+
+  uint8 exe;
+  int	exception;
+  int	pc_changed;
+
+  /* NOTE: everything below this line is not reset by
+     sim_create_inferior() */
+
+  struct cr16_memory mem;
+
+  enum _ins_type ins_type;
+
+} State;
+
+
+extern host_callback *cr16_callback;
+extern uint32 OP[4];
+extern uint32 sign_flag;
+extern struct simops Simops[];
+extern asection *text;
+extern bfd_vma text_start;
+extern bfd_vma text_end;
+extern bfd *prog_bfd;
+
+enum
+{
+  PC_CR   = 0,
+  BDS_CR  = 1,
+  BSR_CR  = 2,
+  DCR_CR  = 3,
+  CAR0_CR = 5,
+  CAR1_CR = 7,
+  CFG_CR  = 9,
+  PSR_CR  = 10,
+  INTBASE_CR = 11,
+  ISP_CR = 13,
+  USP_CR = 15
+};
+
+enum
+{
+  PSR_I_BIT = 0x0800,
+  PSR_P_BIT = 0x0400,
+  PSR_E_BIT = 0x0200,
+  PSR_N_BIT = 0x0100,
+  PSR_Z_BIT = 0x0040,
+  PSR_F_BIT = 0x0020,
+  PSR_U_BIT = 0x0010,
+  PSR_L_BIT = 0x0004,
+  PSR_T_BIT = 0x0002,
+  PSR_C_BIT = 0x0001,
+};
+
+#define PSR CREG (PSR_CR)
+#define SET_PSR(VAL) SET_CREG (PSR_CR, (VAL))
+#define SET_HW_PSR(VAL) SET_HW_CREG (PSR_CR, (VAL))
+#define SET_PSR_BIT(MASK,VAL) move_to_cr (PSR_CR, ~((creg_t) MASK), (VAL) ? (MASK) : 0, 1)
+
+#define PSR_SM ((PSR & PSR_SM_BIT) != 0)
+#define SET_PSR_SM(VAL) SET_PSR_BIT (PSR_SM_BIT, (VAL))
+
+#define PSR_I ((PSR & PSR_I_BIT) != 0)
+#define SET_PSR_I(VAL) SET_PSR_BIT (PSR_I_BIT, (VAL))
+
+#define PSR_DB ((PSR & PSR_DB_BIT) != 0)
+#define SET_PSR_DB(VAL) SET_PSR_BIT (PSR_DB_BIT, (VAL))
+
+#define PSR_P ((PSR & PSR_P_BIT) != 0)
+#define SET_PSR_P(VAL) SET_PSR_BIT (PSR_P_BIT, (VAL))
+
+#define PSR_E ((PSR & PSR_E_BIT) != 0)
+#define SET_PSR_E(VAL) SET_PSR_BIT (PSR_E_BIT, (VAL))
+
+#define PSR_N ((PSR & PSR_N_BIT) != 0)
+#define SET_PSR_N(VAL) SET_PSR_BIT (PSR_N_BIT, (VAL))
+
+#define PSR_Z ((PSR & PSR_Z_BIT) != 0)
+#define SET_PSR_Z(VAL) SET_PSR_BIT (PSR_Z_BIT, (VAL))
+
+#define PSR_F ((PSR & PSR_F_BIT) != 0)
+#define SET_PSR_F(VAL) SET_PSR_BIT (PSR_F_BIT, (VAL))
+
+#define PSR_U ((PSR & PSR_U_BIT) != 0)
+#define SET_PSR_U(VAL) SET_PSR_BIT (PSR_U_BIT, (VAL))
+
+#define PSR_L ((PSR & PSR_L_BIT) != 0)
+#define SET_PSR_L(VAL) SET_PSR_BIT (PSR_L_BIT, (VAL))
+
+#define PSR_T ((PSR & PSR_T_BIT) != 0)
+#define SET_PSR_T(VAL) SET_PSR_BIT (PSR_T_BIT, (VAL))
+
+#define PSR_C ((PSR & PSR_C_BIT) != 0)
+#define SET_PSR_C(VAL) SET_PSR_BIT (PSR_C_BIT, (VAL))
+
+/* See simopsc.:move_to_cr() for registers that can not be read-from
+   or assigned-to directly */
+
+#define PC	CREG (PC_CR)
+#define SET_PC(VAL) SET_CREG (PC_CR, (VAL))
+//#define SET_PC(VAL) (State.cregs[PC_CR] = (VAL))
+
+#define BPSR	CREG (BPSR_CR)
+#define SET_BPSR(VAL) SET_CREG (BPSR_CR, (VAL))
+
+#define BPC	CREG (BPC_CR)
+#define SET_BPC(VAL) SET_CREG (BPC_CR, (VAL))
+
+#define DPSR	CREG (DPSR_CR)
+#define SET_DPSR(VAL) SET_CREG (DPSR_CR, (VAL))
+
+#define DPC	CREG (DPC_CR)
+#define SET_DPC(VAL) SET_CREG (DPC_CR, (VAL))
+
+#define RPT_C	CREG (RPT_C_CR)
+#define SET_RPT_C(VAL) SET_CREG (RPT_C_CR, (VAL))
+
+#define RPT_S	CREG (RPT_S_CR)
+#define SET_RPT_S(VAL) SET_CREG (RPT_S_CR, (VAL))
+
+#define RPT_E	CREG (RPT_E_CR)
+#define SET_RPT_E(VAL) SET_CREG (RPT_E_CR, (VAL))
+
+#define MOD_S	CREG (MOD_S_CR)
+#define SET_MOD_S(VAL) SET_CREG (MOD_S_CR, (VAL))
+
+#define MOD_E	CREG (MOD_E_CR)
+#define SET_MOD_E(VAL) SET_CREG (MOD_E_CR, (VAL))
+
+#define IBA	CREG (IBA_CR)
+#define SET_IBA(VAL) SET_CREG (IBA_CR, (VAL))
+
+
+#define SIG_CR16_STOP	-1
+#define SIG_CR16_EXIT	-2
+#define SIG_CR16_BUS    -3
+#define SIG_CR16_IAD    -4
+
+#define SEXT3(x)	((((x)&0x7)^(~3))+4)	
+
+/* sign-extend a 4-bit number */
+#define SEXT4(x)	((((x)&0xf)^(~7))+8)	
+
+/* sign-extend an 8-bit number */
+#define SEXT8(x)	((((x)&0xff)^(~0x7f))+0x80)
+
+/* sign-extend a 16-bit number */
+#define SEXT16(x)	((((x)&0xffff)^(~0x7fff))+0x8000)
+
+/* sign-extend a 24-bit number */
+#define SEXT24(x)	((((x)&0xffffff)^(~0x7fffff))+0x800000)
+
+/* sign-extend a 32-bit number */
+#define SEXT32(x)	((((x)&0xffffffff)^(~0x7fffffff))+0x80000000)
+
+extern uint8 *dmem_addr (uint32 offset);
+extern uint8 *imem_addr PARAMS ((uint32));
+extern bfd_vma decode_pc PARAMS ((void));
+
+#define	RB(x)	(*(dmem_addr(x)))
+#define SB(addr,data)	( RB(addr) = (data & 0xff))
+
+#if defined(__GNUC__) && defined(__OPTIMIZE__) && !defined(NO_ENDIAN_INLINE)
+#define ENDIAN_INLINE static __inline__
+#include "endian.c"
+#undef ENDIAN_INLINE
+
+#else
+extern uint32 get_longword PARAMS ((uint8 *));
+extern uint16 get_word PARAMS ((uint8 *));
+extern int64 get_longlong PARAMS ((uint8 *));
+extern void write_word PARAMS ((uint8 *addr, uint16 data));
+extern void write_longword PARAMS ((uint8 *addr, uint32 data));
+extern void write_longlong PARAMS ((uint8 *addr, int64 data));
+#endif
+
+#define SW(addr,data)		write_word(dmem_addr(addr),data)
+#define RW(x)			get_word(dmem_addr(x))
+#define SLW(addr,data)  	write_longword(dmem_addr(addr),data)
+#define RLW(x)			get_longword(dmem_addr(x))
+#define READ_16(x)		get_word(x)
+#define WRITE_16(addr,data)	write_word(addr,data)
+#define READ_64(x)		get_longlong(x)
+#define WRITE_64(addr,data)	write_longlong(addr,data)
+
+#define JMP(x)			do { SET_PC (x); State.pc_changed = 1; } while (0)
+
+#define RIE_VECTOR_START  0xffc2
+#define AE_VECTOR_START   0xffc3
+#define TRAP_VECTOR_START 0xffc4	/* vector for trap 0 */
+#define DBT_VECTOR_START  0xffd4
+#define SDBT_VECTOR_START 0xffd5
+
+#define INT_VECTOR_START   0xFFFE00 /*maskable interrupt - mapped to ICU */
+#define NMI_VECTOR_START   0xFFFF00 /*non-maskable interrupt;for observability*/
+#define ISE_VECTOR_START   0xFFFC00 /*in-system emulation trap */
+#define ADBG_VECTOR_START  0xFFFC02 /*alternate debug trap */
+#define ATRC_VECTOR_START  0xFFFC0C /*alternate trace trap */
+#define ABPT_VECTOR_START  0xFFFC0E /*alternate break point trap */
+
+
+/* Scedule a store of VAL into cr[CR].  MASK indicates the bits in
+   cr[CR] that should not be modified (i.e. cr[CR] = (cr[CR] & MASK) |
+   (VAL & ~MASK)).  In addition, unless PSR_HW_P, a VAL intended for
+   PSR is masked for zero bits. */
+
+extern creg_t move_to_cr (int cr, creg_t mask, creg_t val, int psw_hw_p);