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8517f62b16
binutils-gdb/sim/d10v/interp.c
Andrew Cagney 8517f62b16 Ref gdb/11763 - can't stop a running simulator: 
o	Provide poll_quit callback to simulators
		so that they can poll for SIGINT on
		clueless OS's.

	o	Add sim_stop to simulators so that clients
		can request a halt (eg gdbtk's STOP button)
		Works for PPC!

	o	Re-arange remote-sim.c so that the
		hard work is moved from gdbsim_resume()
		to gdbsim_wait() (where it should be).
1997-04-18 12:24:52 +00:00

941 lines
23 KiB
C
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#include <signal.h>
#include "sysdep.h"
#include "bfd.h"
#include "callback.h"
#include "remote-sim.h"
#include "d10v_sim.h"
#define IMEM_SIZE 18 /* D10V instruction memory size is 18 bits */
#define DMEM_SIZE 16 /* Data memory is 64K (but only 32K internal RAM) */
#define UMEM_SIZE 17 /* each unified memory region is 17 bits */
enum _leftright { LEFT_FIRST, RIGHT_FIRST };
static char *myname;
static SIM_OPEN_KIND sim_kind;
static bfd_vma start_address;
int d10v_debug;
host_callback *d10v_callback;
unsigned long ins_type_counters[ (int)INS_MAX ];
uint16 OP[4];
static int init_text_p = 0;
/* non-zero if we opened prog_bfd */
static int prog_bfd_was_opened_p;
bfd *prog_bfd;
asection *text;
bfd_vma text_start;
bfd_vma text_end;
static long hash PARAMS ((long insn, int format));
static struct hash_entry *lookup_hash PARAMS ((uint32 ins, int size));
static void get_operands PARAMS ((struct simops *s, uint32 ins));
static void do_long PARAMS ((uint32 ins));
static void do_2_short PARAMS ((uint16 ins1, uint16 ins2, enum _leftright leftright));
static void do_parallel PARAMS ((uint16 ins1, uint16 ins2));
static char *add_commas PARAMS ((char *buf, int sizeof_buf, unsigned long value));
extern void sim_size PARAMS ((int power));
static void init_system PARAMS ((void));
extern void sim_set_profile PARAMS ((int n));
extern void sim_set_profile_size PARAMS ((int n));
#ifndef INLINE
#if defined(__GNUC__) && defined(__OPTIMIZE__)
#define INLINE __inline__
#else
#define INLINE
#endif
#endif
#define MAX_HASH 63
struct hash_entry
{
struct hash_entry *next;
long opcode;
long mask;
int size;
struct simops *ops;
};
struct hash_entry hash_table[MAX_HASH+1];
INLINE static long
hash(insn, format)
long insn;
int format;
{
if (format & LONG_OPCODE)
return ((insn & 0x3F000000) >> 24);
else
return((insn & 0x7E00) >> 9);
}
INLINE static struct hash_entry *
lookup_hash (ins, size)
uint32 ins;
int size;
{
struct hash_entry *h;
if (size)
h = &hash_table[(ins & 0x3F000000) >> 24];
else
h = &hash_table[(ins & 0x7E00) >> 9];
while ((ins & h->mask) != h->opcode || h->size != size)
{
if (h->next == NULL)
{
(*d10v_callback->printf_filtered) (d10v_callback, "ERROR looking up hash for %x at PC %x\n",ins, PC);
exit (1);
}
h = h->next;
}
return (h);
}
INLINE static void
get_operands (struct simops *s, uint32 ins)
{
int i, shift, bits, flags;
uint32 mask;
for (i=0; i < s->numops; i++)
{
shift = s->operands[3*i];
bits = s->operands[3*i+1];
flags = s->operands[3*i+2];
mask = 0x7FFFFFFF >> (31 - bits);
OP[i] = (ins >> shift) & mask;
}
}
bfd_vma
decode_pc ()
{
asection *s;
if (!init_text_p)
{
init_text_p = 1;
for (s = prog_bfd->sections; s; s = s->next)
if (strcmp (bfd_get_section_name (prog_bfd, s), ".text") == 0)
{
text = s;
text_start = bfd_get_section_vma (prog_bfd, s);
text_end = text_start + bfd_section_size (prog_bfd, s);
break;
}
}
return (PC << 2) + text_start;
}
static void
do_long (ins)
uint32 ins;
{
struct hash_entry *h;
#ifdef DEBUG
if ((d10v_debug & DEBUG_INSTRUCTION) != 0)
(*d10v_callback->printf_filtered) (d10v_callback, "do_long 0x%x\n", ins);
#endif
h = lookup_hash (ins, 1);
get_operands (h->ops, ins);
State.ins_type = INS_LONG;
ins_type_counters[ (int)State.ins_type ]++;
(h->ops->func)();
}
static void
do_2_short (ins1, ins2, leftright)
uint16 ins1, ins2;
enum _leftright leftright;
{
struct hash_entry *h;
reg_t orig_pc = PC;
enum _ins_type first, second;
#ifdef DEBUG
if ((d10v_debug & DEBUG_INSTRUCTION) != 0)
(*d10v_callback->printf_filtered) (d10v_callback, "do_2_short 0x%x (%s) -> 0x%x\n",
ins1, (leftright) ? "left" : "right", ins2);
#endif
if (leftright == LEFT_FIRST)
{
first = INS_LEFT;
second = INS_RIGHT;
ins_type_counters[ (int)INS_LEFTRIGHT ]++;
}
else
{
first = INS_RIGHT;
second = INS_LEFT;
ins_type_counters[ (int)INS_RIGHTLEFT ]++;
}
h = lookup_hash (ins1, 0);
get_operands (h->ops, ins1);
State.ins_type = first;
ins_type_counters[ (int)State.ins_type ]++;
(h->ops->func)();
/* If the PC has changed (ie, a jump), don't do the second instruction */
if (orig_pc == PC && !State.exception)
{
h = lookup_hash (ins2, 0);
get_operands (h->ops, ins2);
State.ins_type = second;
ins_type_counters[ (int)State.ins_type ]++;
ins_type_counters[ (int)INS_CYCLES ]++;
(h->ops->func)();
}
else if (orig_pc != PC && !State.exception)
ins_type_counters[ (int)INS_COND_JUMP ]++;
}
static void
do_parallel (ins1, ins2)
uint16 ins1, ins2;
{
struct hash_entry *h1, *h2;
#ifdef DEBUG
if ((d10v_debug & DEBUG_INSTRUCTION) != 0)
(*d10v_callback->printf_filtered) (d10v_callback, "do_parallel 0x%x || 0x%x\n", ins1, ins2);
#endif
ins_type_counters[ (int)INS_PARALLEL ]++;
h1 = lookup_hash (ins1, 0);
h2 = lookup_hash (ins2, 0);
if (h1->ops->exec_type == PARONLY)
{
get_operands (h1->ops, ins1);
State.ins_type = INS_LEFT_COND_TEST;
ins_type_counters[ (int)State.ins_type ]++;
(h1->ops->func)();
if (State.exe)
{
ins_type_counters[ (int)INS_COND_TRUE ]++;
get_operands (h2->ops, ins2);
State.ins_type = INS_RIGHT_COND_EXE;
ins_type_counters[ (int)State.ins_type ]++;
(h2->ops->func)();
}
else
ins_type_counters[ (int)INS_COND_FALSE ]++;
}
else if (h2->ops->exec_type == PARONLY)
{
get_operands (h2->ops, ins2);
State.ins_type = INS_RIGHT_COND_TEST;
ins_type_counters[ (int)State.ins_type ]++;
(h2->ops->func)();
if (State.exe)
{
ins_type_counters[ (int)INS_COND_TRUE ]++;
get_operands (h1->ops, ins1);
State.ins_type = INS_LEFT_COND_EXE;
ins_type_counters[ (int)State.ins_type ]++;
(h1->ops->func)();
}
else
ins_type_counters[ (int)INS_COND_FALSE ]++;
}
else
{
get_operands (h1->ops, ins1);
State.ins_type = INS_LEFT_PARALLEL;
ins_type_counters[ (int)State.ins_type ]++;
(h1->ops->func)();
if (!State.exception)
{
get_operands (h2->ops, ins2);
State.ins_type = INS_RIGHT_PARALLEL;
ins_type_counters[ (int)State.ins_type ]++;
(h2->ops->func)();
}
}
}
static char *
add_commas(buf, sizeof_buf, value)
char *buf;
int sizeof_buf;
unsigned long value;
{
int comma = 3;
char *endbuf = buf + sizeof_buf - 1;
*--endbuf = '\0';
do {
if (comma-- == 0)
{
*--endbuf = ',';
comma = 2;
}
*--endbuf = (value % 10) + '0';
} while ((value /= 10) != 0);
return endbuf;
}
void
sim_size (power)
int power;
{
int i;
if (State.imem)
{
for (i=0;i<128;i++)
{
if (State.umem[i])
{
free (State.umem[i]);
State.umem[i] = NULL;
}
}
free (State.imem);
free (State.dmem);
}
State.imem = (uint8 *)calloc(1,1<<IMEM_SIZE);
State.dmem = (uint8 *)calloc(1,1<<DMEM_SIZE);
for (i=1;i<127;i++)
State.umem[i] = NULL;
State.umem[0] = (uint8 *)calloc(1,1<<UMEM_SIZE);
State.umem[1] = (uint8 *)calloc(1,1<<UMEM_SIZE);
State.umem[2] = (uint8 *)calloc(1,1<<UMEM_SIZE);
State.umem[127] = (uint8 *)calloc(1,1<<UMEM_SIZE);
if (!State.imem || !State.dmem || !State.umem[0] || !State.umem[1] || !State.umem[2] || !State.umem[127] )
{
(*d10v_callback->printf_filtered) (d10v_callback, "Memory allocation failed.\n");
exit(1);
}
SET_IMAP0(0x1000);
SET_IMAP1(0x1000);
SET_DMAP(0);
#ifdef DEBUG
if ((d10v_debug & DEBUG_MEMSIZE) != 0)
{
char buffer[20];
(*d10v_callback->printf_filtered) (d10v_callback,
"Allocated %s bytes instruction memory and\n",
add_commas (buffer, sizeof (buffer), (1UL<<IMEM_SIZE)));
(*d10v_callback->printf_filtered) (d10v_callback, " %s bytes data memory.\n",
add_commas (buffer, sizeof (buffer), (1UL<<IMEM_SIZE)));
}
#endif
}
static void
init_system ()
{
if (!State.imem)
sim_size(1);
}
static int
xfer_mem (addr, buffer, size, write)
SIM_ADDR addr;
unsigned char *buffer;
int size;
int write;
{
if (!State.imem)
init_system ();
#ifdef DEBUG
if ((d10v_debug & DEBUG_INSTRUCTION) != 0)
{
if (write)
(*d10v_callback->printf_filtered) (d10v_callback, "sim_write %d bytes to 0x%x\n", size, addr);
else
(*d10v_callback->printf_filtered) (d10v_callback, "sim_read %d bytes from 0x%x\n", size, addr);
}
#endif
/* to access data, we use the following mapping */
/* 0x01000000 - 0x0103ffff : instruction memory */
/* 0x02000000 - 0x0200ffff : data memory */
/* 0x00000000 - 0x00ffffff : unified memory */
if ( (addr & 0x03000000) == 0)
{
/* UNIFIED MEMORY */
int segment;
segment = addr >> UMEM_SIZE;
addr &= 0x1ffff;
if (!State.umem[segment])
{
#ifdef DEBUG
(*d10v_callback->printf_filtered) (d10v_callback,"Allocating %s bytes unified memory to region %d\n",
add_commas (buffer, sizeof (buffer), (1UL<<IMEM_SIZE)), segment);
#endif
State.umem[segment] = (uint8 *)calloc(1,1<<UMEM_SIZE);
}
if (!State.umem[segment])
{
(*d10v_callback->printf_filtered) (d10v_callback, "Memory allocation failed.\n");
exit(1);
}
/* FIXME: need to check size and read/write multiple segments if necessary */
if (write)
memcpy (State.umem[segment]+addr, buffer, size) ;
else
memcpy (buffer, State.umem[segment]+addr, size);
}
else if ( (addr & 0x03000000) == 0x02000000)
{
/* DATA MEMORY */
addr &= ~0x02000000;
if (size > (1<<(DMEM_SIZE-1)))
{
(*d10v_callback->printf_filtered) (d10v_callback, "ERROR: data section is only %d bytes.\n",1<<(DMEM_SIZE-1));
exit(1);
}
if (write)
memcpy (State.dmem+addr, buffer, size);
else
memcpy (buffer, State.dmem+addr, size);
}
else if ( (addr & 0x03000000) == 0x01000000)
{
/* INSTRUCTION MEMORY */
addr &= ~0x01000000;
if (size > (1<<IMEM_SIZE))
{
(*d10v_callback->printf_filtered) (d10v_callback, "ERROR: inst section is only %d bytes.\n",1<<IMEM_SIZE);
exit(1);
}
if (write)
memcpy (State.imem+addr, buffer, size);
else
memcpy (buffer, State.imem+addr, size);
}
else if (write)
{
(*d10v_callback->printf_filtered) (d10v_callback, "ERROR: address 0x%x is not in valid range\n",addr);
(*d10v_callback->printf_filtered) (d10v_callback, "Instruction addresses start at 0x01000000\n");
(*d10v_callback->printf_filtered) (d10v_callback, "Data addresses start at 0x02000000\n");
(*d10v_callback->printf_filtered) (d10v_callback, "Unified addresses start at 0x00000000\n");
exit(1);
}
else
return 0;
return size;
}
int
sim_write (sd, addr, buffer, size)
SIM_DESC sd;
SIM_ADDR addr;
unsigned char *buffer;
int size;
{
return xfer_mem( addr, buffer, size, 1);
}
int
sim_read (sd, addr, buffer, size)
SIM_DESC sd;
SIM_ADDR addr;
unsigned char *buffer;
int size;
{
return xfer_mem( addr, buffer, size, 0);
}
SIM_DESC
sim_open (kind, argv)
SIM_OPEN_KIND kind;
char **argv;
{
struct simops *s;
struct hash_entry *h;
static int init_p = 0;
char **p;
sim_kind = kind;
myname = argv[0];
for (p = argv + 1; *p; ++p)
{
/* Ignore endian specification. */
if (strcmp (*p, "-E") == 0)
++p;
else
#ifdef DEBUG
if (strcmp (*p, "-t") == 0)
d10v_debug = DEBUG;
else
#endif
(*d10v_callback->printf_filtered) (d10v_callback, "ERROR: unsupported option(s): %s\n",*p);
}
/* put all the opcodes in the hash table */
if (!init_p++)
{
for (s = Simops; s->func; s++)
{
h = &hash_table[hash(s->opcode,s->format)];
/* go to the last entry in the chain */
while (h->next)
h = h->next;
if (h->ops)
{
h->next = (struct hash_entry *) calloc(1,sizeof(struct hash_entry));
if (!h->next)
perror ("malloc failure");
h = h->next;
}
h->ops = s;
h->mask = s->mask;
h->opcode = s->opcode;
h->size = s->is_long;
}
}
/* Fudge our descriptor. */
return (SIM_DESC) 1;
}
void
sim_close (sd, quitting)
SIM_DESC sd;
int quitting;
{
if (prog_bfd != NULL && prog_bfd_was_opened_p)
bfd_close (prog_bfd);
}
void
sim_set_profile (n)
int n;
{
(*d10v_callback->printf_filtered) (d10v_callback, "sim_set_profile %d\n",n);
}
void
sim_set_profile_size (n)
int n;
{
(*d10v_callback->printf_filtered) (d10v_callback, "sim_set_profile_size %d\n",n);
}
uint8 *
dmem_addr( addr )
uint32 addr;
{
int seg;
addr &= 0xffff;
if (addr > 0xbfff)
{
if ( (addr & 0xfff0) != 0xff00)
{
(*d10v_callback->printf_filtered) (d10v_callback, "Data address 0x%lx is in I/O space, pc = 0x%lx.\n",
(long)addr, (long)decode_pc ());
State.exception = SIGBUS;
}
return State.dmem + addr;
}
if (addr > 0x7fff)
{
if (DMAP & 0x1000)
{
/* instruction memory */
return (DMAP & 0xf) * 0x4000 + State.imem;
}
/* unified memory */
/* this is ugly because we allocate unified memory in 128K segments and */
/* dmap addresses 16k segments */
seg = (DMAP & 0x3ff) >> 3;
if (State.umem[seg] == NULL)
{
(*d10v_callback->printf_filtered) (d10v_callback, "ERROR: unified memory region %d unmapped, pc = 0x%lx\n",
seg, (long)decode_pc ());
State.exception = SIGBUS;
}
return State.umem[seg] + (DMAP & 7) * 0x4000;
}
return State.dmem + addr;
}
static uint8 *
pc_addr()
{
uint32 pc = ((uint32)PC) << 2;
uint16 imap;
if (pc & 0x20000)
imap = IMAP1;
else
imap = IMAP0;
if (imap & 0x1000)
return State.imem + pc;
if (State.umem[imap & 0xff] == NULL)
{
(*d10v_callback->printf_filtered) (d10v_callback, "ERROR: unified memory region %d unmapped, pc = 0x%lx\n",
imap & 0xff, (long)PC);
State.exception = SIGBUS;
return 0;
}
return State.umem[imap & 0xff] + pc;
}
static int stop_simulator;
static void
sim_ctrl_c()
{
stop_simulator = 1;
}
int
sim_stop (sd)
SIM_DESC sd;
{
stop_simulator = 1;
return 1;
}
/* Run (or resume) the program. */
void
sim_resume (sd, step, siggnal)
SIM_DESC sd;
int step, siggnal;
{
void (*prev) ();
uint32 inst;
/* (*d10v_callback->printf_filtered) (d10v_callback, "sim_resume (%d,%d) PC=0x%x\n",step,siggnal,PC); */
State.exception = 0;
prev = signal(SIGINT, sim_ctrl_c);
stop_simulator = step;
do
{
inst = get_longword( pc_addr() );
State.pc_changed = 0;
ins_type_counters[ (int)INS_CYCLES ]++;
switch (inst & 0xC0000000)
{
case 0xC0000000:
/* long instruction */
do_long (inst & 0x3FFFFFFF);
break;
case 0x80000000:
/* R -> L */
do_2_short ( inst & 0x7FFF, (inst & 0x3FFF8000) >> 15, 0);
break;
case 0x40000000:
/* L -> R */
do_2_short ((inst & 0x3FFF8000) >> 15, inst & 0x7FFF, 1);
break;
case 0:
do_parallel ((inst & 0x3FFF8000) >> 15, inst & 0x7FFF);
break;
}
if (State.RP && PC == RPT_E)
{
RPT_C -= 1;
if (RPT_C == 0)
State.RP = 0;
else
PC = RPT_S;
}
else if (!State.pc_changed)
PC++;
}
while ( !State.exception && !stop_simulator);
if (step && !State.exception)
State.exception = SIGTRAP;
signal(SIGINT, prev);
}
int
sim_trace (sd)
SIM_DESC sd;
{
#ifdef DEBUG
d10v_debug = DEBUG;
#endif
sim_resume (sd, 0, 0);
return 1;
}
void
sim_info (sd, verbose)
SIM_DESC sd;
int verbose;
{
char buf1[40];
char buf2[40];
char buf3[40];
char buf4[40];
char buf5[40];
unsigned long left = ins_type_counters[ (int)INS_LEFT ] + ins_type_counters[ (int)INS_LEFT_COND_EXE ];
unsigned long left_nops = ins_type_counters[ (int)INS_LEFT_NOPS ];
unsigned long left_parallel = ins_type_counters[ (int)INS_LEFT_PARALLEL ];
unsigned long left_cond = ins_type_counters[ (int)INS_LEFT_COND_TEST ];
unsigned long left_total = left + left_parallel + left_cond + left_nops;
unsigned long right = ins_type_counters[ (int)INS_RIGHT ] + ins_type_counters[ (int)INS_RIGHT_COND_EXE ];
unsigned long right_nops = ins_type_counters[ (int)INS_RIGHT_NOPS ];
unsigned long right_parallel = ins_type_counters[ (int)INS_RIGHT_PARALLEL ];
unsigned long right_cond = ins_type_counters[ (int)INS_RIGHT_COND_TEST ];
unsigned long right_total = right + right_parallel + right_cond + right_nops;
unsigned long unknown = ins_type_counters[ (int)INS_UNKNOWN ];
unsigned long ins_long = ins_type_counters[ (int)INS_LONG ];
unsigned long parallel = ins_type_counters[ (int)INS_PARALLEL ];
unsigned long leftright = ins_type_counters[ (int)INS_LEFTRIGHT ];
unsigned long rightleft = ins_type_counters[ (int)INS_RIGHTLEFT ];
unsigned long cond_true = ins_type_counters[ (int)INS_COND_TRUE ];
unsigned long cond_false = ins_type_counters[ (int)INS_COND_FALSE ];
unsigned long cond_jump = ins_type_counters[ (int)INS_COND_JUMP ];
unsigned long cycles = ins_type_counters[ (int)INS_CYCLES ];
unsigned long total = (unknown + left_total + right_total + ins_long);
int size = strlen (add_commas (buf1, sizeof (buf1), total));
int parallel_size = strlen (add_commas (buf1, sizeof (buf1),
(left_parallel > right_parallel) ? left_parallel : right_parallel));
int cond_size = strlen (add_commas (buf1, sizeof (buf1), (left_cond > right_cond) ? left_cond : right_cond));
int nop_size = strlen (add_commas (buf1, sizeof (buf1), (left_nops > right_nops) ? left_nops : right_nops));
int normal_size = strlen (add_commas (buf1, sizeof (buf1), (left > right) ? left : right));
(*d10v_callback->printf_filtered) (d10v_callback,
"executed %*s left instruction(s), %*s normal, %*s parallel, %*s EXExxx, %*s nops\n",
size, add_commas (buf1, sizeof (buf1), left_total),
normal_size, add_commas (buf2, sizeof (buf2), left),
parallel_size, add_commas (buf3, sizeof (buf3), left_parallel),
cond_size, add_commas (buf4, sizeof (buf4), left_cond),
nop_size, add_commas (buf5, sizeof (buf5), left_nops));
(*d10v_callback->printf_filtered) (d10v_callback,
"executed %*s right instruction(s), %*s normal, %*s parallel, %*s EXExxx, %*s nops\n",
size, add_commas (buf1, sizeof (buf1), right_total),
normal_size, add_commas (buf2, sizeof (buf2), right),
parallel_size, add_commas (buf3, sizeof (buf3), right_parallel),
cond_size, add_commas (buf4, sizeof (buf4), right_cond),
nop_size, add_commas (buf5, sizeof (buf5), right_nops));
if (ins_long)
(*d10v_callback->printf_filtered) (d10v_callback,
"executed %*s long instruction(s)\n",
size, add_commas (buf1, sizeof (buf1), ins_long));
if (parallel)
(*d10v_callback->printf_filtered) (d10v_callback,
"executed %*s parallel instruction(s)\n",
size, add_commas (buf1, sizeof (buf1), parallel));
if (leftright)
(*d10v_callback->printf_filtered) (d10v_callback,
"executed %*s instruction(s) encoded L->R\n",
size, add_commas (buf1, sizeof (buf1), leftright));
if (rightleft)
(*d10v_callback->printf_filtered) (d10v_callback,
"executed %*s instruction(s) encoded R->L\n",
size, add_commas (buf1, sizeof (buf1), rightleft));
if (unknown)
(*d10v_callback->printf_filtered) (d10v_callback,
"executed %*s unknown instruction(s)\n",
size, add_commas (buf1, sizeof (buf1), unknown));
if (cond_true)
(*d10v_callback->printf_filtered) (d10v_callback,
"executed %*s instruction(s) due to EXExxx condition being true\n",
size, add_commas (buf1, sizeof (buf1), cond_true));
if (cond_false)
(*d10v_callback->printf_filtered) (d10v_callback,
"skipped %*s instruction(s) due to EXExxx condition being false\n",
size, add_commas (buf1, sizeof (buf1), cond_false));
if (cond_jump)
(*d10v_callback->printf_filtered) (d10v_callback,
"skipped %*s instruction(s) due to conditional branch succeeding\n",
size, add_commas (buf1, sizeof (buf1), cond_jump));
(*d10v_callback->printf_filtered) (d10v_callback,
"executed %*s cycle(s)\n",
size, add_commas (buf1, sizeof (buf1), cycles));
(*d10v_callback->printf_filtered) (d10v_callback,
"executed %*s total instructions\n",
size, add_commas (buf1, sizeof (buf1), total));
}
SIM_RC
sim_create_inferior (sd, argv, env)
SIM_DESC sd;
char **argv;
char **env;
{
#ifdef DEBUG
if (d10v_debug)
(*d10v_callback->printf_filtered) (d10v_callback, "sim_create_inferior: PC=0x%x\n", start_address);
#endif
/* reset all state information */
memset (&State.regs, 0, (int)&State.imem - (int)&State.regs[0]);
/* set PC */
PC = start_address >> 2;
/* cpu resets imap0 to 0 and imap1 to 0x7f, but D10V-EVA board */
/* resets imap0 and imap1 to 0x1000. */
SET_IMAP0(0x1000);
SET_IMAP1(0x1000);
SET_DMAP(0);
return SIM_RC_OK;
}
void
sim_kill (sd)
SIM_DESC sd;
{
/* nothing to do */
}
void
sim_set_callbacks (sd, p)
SIM_DESC sd;
host_callback *p;
{
d10v_callback = p;
}
void
sim_stop_reason (sd, reason, sigrc)
SIM_DESC sd;
enum sim_stop *reason;
int *sigrc;
{
/* (*d10v_callback->printf_filtered) (d10v_callback, "sim_stop_reason: PC=0x%x\n",PC<<2); */
switch (State.exception)
{
case SIG_D10V_STOP: /* stop instruction */
*reason = sim_exited;
*sigrc = 0;
break;
case SIG_D10V_EXIT: /* exit trap */
*reason = sim_exited;
*sigrc = State.regs[2];
break;
default: /* some signal */
*reason = sim_stopped;
*sigrc = State.exception;
break;
}
}
void
sim_fetch_register (sd, rn, memory)
SIM_DESC sd;
int rn;
unsigned char *memory;
{
if (!State.imem)
init_system();
if (rn > 34)
WRITE_64 (memory, State.a[rn-35]);
else if (rn == 32)
WRITE_16 (memory, IMAP0);
else if (rn == 33)
WRITE_16 (memory, IMAP1);
else if (rn == 34)
WRITE_16 (memory, DMAP);
else
WRITE_16 (memory, State.regs[rn]);
}
void
sim_store_register (sd, rn, memory)
SIM_DESC sd;
int rn;
unsigned char *memory;
{
if (!State.imem)
init_system();
if (rn > 34)
State.a[rn-35] = READ_64 (memory) & MASK40;
else if (rn == 34)
SET_DMAP( READ_16(memory) );
else if (rn == 33)
SET_IMAP1( READ_16(memory) );
else if (rn == 32)
SET_IMAP0( READ_16(memory) );
else
State.regs[rn]= READ_16 (memory);
}
void
sim_do_command (sd, cmd)
SIM_DESC sd;
char *cmd;
{
(*d10v_callback->printf_filtered) (d10v_callback, "sim_do_command: %s\n",cmd);
}
SIM_RC
sim_load (sd, prog, abfd, from_tty)
SIM_DESC sd;
char *prog;
bfd *abfd;
int from_tty;
{
extern bfd *sim_load_file (); /* ??? Don't know where this should live. */
if (prog_bfd != NULL && prog_bfd_was_opened_p)
bfd_close (prog_bfd);
prog_bfd = sim_load_file (sd, myname, d10v_callback, prog, abfd,
sim_kind == SIM_OPEN_DEBUG);
if (prog_bfd == NULL)
return SIM_RC_FAIL;
start_address = bfd_get_start_address (prog_bfd);
prog_bfd_was_opened_p = abfd == NULL;
return SIM_RC_OK;
}
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