/* Simulation code for the CR16 processor.
- Copyright (C) 2008, 2009, 2010, 2011 Free Software Foundation, Inc.
+ Copyright (C) 2008-2021 Free Software Foundation, Inc.
Contributed by M Ranga Swami Reddy <MR.Swami.Reddy@nsc.com>
This file is part of GDB, the GNU debugger.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
+/* This must come before any other includes. */
+#include "defs.h"
+
+#include <inttypes.h>
#include <signal.h>
-#include "sysdep.h"
+#include <stdlib.h>
+#include <string.h>
#include "bfd.h"
-#include "gdb/callback.h"
-#include "gdb/remote-sim.h"
+#include "sim/callback.h"
+#include "sim/sim.h"
+
+#include "sim-main.h"
+#include "sim-options.h"
-#include "cr16_sim.h"
#include "gdb/sim-cr16.h"
#include "gdb/signals.h"
#include "opcode/cr16.h"
-static char *myname;
-static SIM_OPEN_KIND sim_kind;
-int cr16_debug;
-
-/* Set this to true to get the previous segment layout. */
-
-int old_segment_mapping;
+struct _state State;
-host_callback *cr16_callback;
-unsigned long ins_type_counters[ (int)INS_MAX ];
+int cr16_debug;
uint32 OP[4];
uint32 sign_flag;
-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 struct hash_entry *lookup_hash PARAMS ((uint64 ins, int size));
-static void get_operands PARAMS ((operand_desc *s, uint64 mcode, int isize, int nops));
-static int do_run PARAMS ((uint64 mc));
-static char *add_commas PARAMS ((char *buf, int sizeof_buf, unsigned long value));
-extern void sim_set_profile PARAMS ((int n));
-extern void sim_set_profile_size PARAMS ((int n));
-static INLINE uint8 *map_memory (unsigned phys_addr);
-
-#ifdef NEED_UI_LOOP_HOOK
-/* How often to run the ui_loop update, when in use */
-#define UI_LOOP_POLL_INTERVAL 0x14000
-
-/* Counter for the ui_loop_hook update */
-static long ui_loop_hook_counter = UI_LOOP_POLL_INTERVAL;
-
-/* Actual hook to call to run through gdb's gui event loop */
-extern int (*deprecated_ui_loop_hook) PARAMS ((int signo));
-#endif /* NEED_UI_LOOP_HOOK */
-
-#ifndef INLINE
-#if defined(__GNUC__) && defined(__OPTIMIZE__)
-#define INLINE __inline__
-#else
-#define INLINE
-#endif
-#endif
+static struct hash_entry *lookup_hash (SIM_DESC, SIM_CPU *, uint64 ins, int size);
+static void get_operands (operand_desc *s, uint64 mcode, int isize, int nops);
+
#define MAX_HASH 16
struct hash_entry
INLINE static struct hash_entry *
-lookup_hash (uint64 ins, int size)
+lookup_hash (SIM_DESC sd, SIM_CPU *cpu, uint64 ins, int size)
{
uint32 mask;
struct hash_entry *h;
while ((ins & mask) != (BIN(h->opcode, h->mask)))
{
if (h->next == NULL)
- {
- State.exception = SIGILL;
- State.pc_changed = 1; /* Don't increment the PC. */
- return NULL;
- }
+ sim_engine_halt (sd, cpu, NULL, PC, sim_stopped, SIM_SIGILL);
h = h->next;
mask = (((1 << (32 - h->mask)) -1) << h->mask);
State.trace.psw = PSR;
}
-bfd_vma
-decode_pc ()
-{
- asection *s;
- if (!init_text_p && prog_bfd != NULL)
- {
- 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) + text_start;
-}
-
-
-
static int
-do_run(uint64 mcode)
+do_run (SIM_DESC sd, SIM_CPU *cpu, uint64 mcode)
{
- struct simops *s= Simops;
struct hash_entry *h;
- char func[12]="\0";
- uint8 *iaddr;
+
#ifdef DEBUG
if ((cr16_debug & DEBUG_INSTRUCTION) != 0)
- (*cr16_callback->printf_filtered) (cr16_callback, "do_long 0x%x\n", mcode);
+ sim_io_printf (sd, "do_long 0x%" PRIx64 "\n", mcode);
#endif
-
- h = lookup_hash(mcode, 1);
- if ((h == NULL) || (h->opcode == NULL)) return 0;
+ h = lookup_hash (sd, cpu, mcode, 1);
- if (h->size == 3)
- {
- iaddr = imem_addr ((uint32)PC + 2);
- mcode = (mcode << 16) | get_longword( iaddr );
- }
+ if ((h == NULL) || (h->opcode == 0))
+ return 0;
+
+ if (h->size == 3)
+ mcode = (mcode << 16) | RW (PC + 4);
/* Re-set OP list. */
OP[0] = OP[1] = OP[2] = OP[3] = sign_flag = 0;
//State.ins_type = h->flags;
- (h->ops->func)();
+ (h->ops->func) (sd, cpu);
return h->size;
}
-static char *
-add_commas(char *buf, int sizeof_buf, unsigned long value)
+static sim_cia
+cr16_pc_get (sim_cpu *cpu)
{
- 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 (int power)
-{
- int i;
- for (i = 0; i < IMEM_SEGMENTS; i++)
- {
- if (State.mem.insn[i])
- free (State.mem.insn[i]);
- }
- for (i = 0; i < DMEM_SEGMENTS; i++)
- {
- if (State.mem.data[i])
- free (State.mem.data[i]);
- }
- for (i = 0; i < UMEM_SEGMENTS; i++)
- {
- if (State.mem.unif[i])
- free (State.mem.unif[i]);
- }
- /* Always allocate dmem segment 0. This contains the IMAP and DMAP
- registers. */
- State.mem.data[0] = calloc (1, SEGMENT_SIZE);
+ return PC;
}
-/* For tracing - leave info on last access around. */
-static char *last_segname = "invalid";
-static char *last_from = "invalid";
-static char *last_to = "invalid";
-
-enum
- {
- IMAP0_OFFSET = 0xff00,
- DMAP0_OFFSET = 0xff08,
- DMAP2_SHADDOW = 0xff04,
- DMAP2_OFFSET = 0xff0c
- };
-
static void
-set_dmap_register (int reg_nr, unsigned long value)
+cr16_pc_set (sim_cpu *cpu, sim_cia pc)
{
- uint8 *raw = map_memory (SIM_CR16_MEMORY_DATA
- + DMAP0_OFFSET + 2 * reg_nr);
- WRITE_16 (raw, value);
-#ifdef DEBUG
- if ((cr16_debug & DEBUG_MEMORY))
- {
- (*cr16_callback->printf_filtered)
- (cr16_callback, "mem: dmap%d=0x%04lx\n", reg_nr, value);
- }
-#endif
-}
-
-static unsigned long
-dmap_register (void *regcache, int reg_nr)
-{
- uint8 *raw = map_memory (SIM_CR16_MEMORY_DATA
- + DMAP0_OFFSET + 2 * reg_nr);
- return READ_16 (raw);
+ SIM_DESC sd = CPU_STATE (cpu);
+ SET_PC (pc);
}
static void
-set_imap_register (int reg_nr, unsigned long value)
-{
- uint8 *raw = map_memory (SIM_CR16_MEMORY_DATA
- + IMAP0_OFFSET + 2 * reg_nr);
- WRITE_16 (raw, value);
-#ifdef DEBUG
- if ((cr16_debug & DEBUG_MEMORY))
- {
- (*cr16_callback->printf_filtered)
- (cr16_callback, "mem: imap%d=0x%04lx\n", reg_nr, value);
- }
-#endif
-}
-
-static unsigned long
-imap_register (void *regcache, int reg_nr)
+free_state (SIM_DESC sd)
{
- uint8 *raw = map_memory (SIM_CR16_MEMORY_DATA
- + IMAP0_OFFSET + 2 * reg_nr);
- return READ_16 (raw);
+ if (STATE_MODULES (sd) != NULL)
+ sim_module_uninstall (sd);
+ sim_cpu_free_all (sd);
+ sim_state_free (sd);
}
-enum
- {
- HELD_SPI_IDX = 0,
- HELD_SPU_IDX = 1
- };
-
-static unsigned long
-spu_register (void)
-{
- return GPR (SP_IDX);
-}
+static int cr16_reg_fetch (SIM_CPU *, int, unsigned char *, int);
+static int cr16_reg_store (SIM_CPU *, int, unsigned char *, int);
-static unsigned long
-spi_register (void)
-{
- return GPR (SP_IDX);
-}
-
-static void
-set_spi_register (unsigned long value)
-{
- SET_GPR (SP_IDX, value);
-}
-
-static void
-set_spu_register (unsigned long value)
+SIM_DESC
+sim_open (SIM_OPEN_KIND kind, struct host_callback_struct *cb,
+ struct bfd *abfd, char * const *argv)
{
- SET_GPR (SP_IDX, value);
-}
+ struct simops *s;
+ struct hash_entry *h;
+ static int init_p = 0;
+ char **p;
+ int i;
+ SIM_DESC sd = sim_state_alloc (kind, cb);
+ SIM_ASSERT (STATE_MAGIC (sd) == SIM_MAGIC_NUMBER);
-/* Given a virtual address in the DMAP address space, translate it
- into a physical address. */
+ /* Set default options before parsing user options. */
+ current_target_byte_order = BFD_ENDIAN_LITTLE;
-unsigned long
-sim_cr16_translate_dmap_addr (unsigned long offset,
- int nr_bytes,
- unsigned long *phys,
- void *regcache,
- unsigned long (*dmap_register) (void *regcache,
- int reg_nr))
-{
- short map;
- int regno;
- last_from = "logical-data";
- if (offset >= DMAP_BLOCK_SIZE * SIM_CR16_NR_DMAP_REGS)
+ /* The cpu data is kept in a separately allocated chunk of memory. */
+ if (sim_cpu_alloc_all (sd, 1) != SIM_RC_OK)
{
- /* Logical address out side of data segments, not supported */
+ free_state (sd);
return 0;
}
- regno = (offset / DMAP_BLOCK_SIZE);
- offset = (offset % DMAP_BLOCK_SIZE);
-#if 1
- if ((offset % DMAP_BLOCK_SIZE) + nr_bytes > DMAP_BLOCK_SIZE)
+ if (sim_pre_argv_init (sd, argv[0]) != SIM_RC_OK)
{
- /* Don't cross a BLOCK boundary */
- nr_bytes = DMAP_BLOCK_SIZE - (offset % DMAP_BLOCK_SIZE);
- }
- map = dmap_register (regcache, regno);
- if (regno == 3)
- {
- /* Always maps to data memory */
- int iospi = (offset / 0x1000) % 4;
- int iosp = (map >> (4 * (3 - iospi))) % 0x10;
- last_to = "io-space";
- *phys = (SIM_CR16_MEMORY_DATA + (iosp * 0x10000) + 0xc000 + offset);
- }
- else
- {
- int sp = ((map & 0x3000) >> 12);
- int segno = (map & 0x3ff);
- switch (sp)
- {
- case 0: /* 00: Unified memory */
- *phys = SIM_CR16_MEMORY_UNIFIED + (segno * DMAP_BLOCK_SIZE) + offset;
- last_to = "unified";
- break;
- case 1: /* 01: Instruction Memory */
- *phys = SIM_CR16_MEMORY_INSN + (segno * DMAP_BLOCK_SIZE) + offset;
- last_to = "chip-insn";
- break;
- case 2: /* 10: Internal data memory */
- *phys = SIM_CR16_MEMORY_DATA + (segno << 16) + (regno * DMAP_BLOCK_SIZE) + offset;
- last_to = "chip-data";
- break;
- case 3: /* 11: Reserved */
- return 0;
- }
+ free_state (sd);
+ return 0;
}
-#endif
- return nr_bytes;
-}
-
-/* Given a virtual address in the IMAP address space, translate it
- into a physical address. */
-unsigned long
-sim_cr16_translate_imap_addr (unsigned long offset,
- int nr_bytes,
- unsigned long *phys,
- void *regcache,
- unsigned long (*imap_register) (void *regcache,
- int reg_nr))
-{
- short map;
- int regno;
- int sp;
- int segno;
- last_from = "logical-insn";
- if (offset >= (IMAP_BLOCK_SIZE * SIM_CR16_NR_IMAP_REGS))
+ /* The parser will print an error message for us, so we silently return. */
+ if (sim_parse_args (sd, argv) != SIM_RC_OK)
{
- /* Logical address outside of IMAP segments, not supported */
+ free_state (sd);
return 0;
}
- regno = (offset / IMAP_BLOCK_SIZE);
- offset = (offset % IMAP_BLOCK_SIZE);
- if (offset + nr_bytes > IMAP_BLOCK_SIZE)
- {
- /* Don't cross a BLOCK boundary */
- nr_bytes = IMAP_BLOCK_SIZE - offset;
- }
- map = imap_register (regcache, regno);
- sp = (map & 0x3000) >> 12;
- segno = (map & 0x007f);
- switch (sp)
+
+ /* Check for/establish the a reference program image. */
+ if (sim_analyze_program (sd,
+ (STATE_PROG_ARGV (sd) != NULL
+ ? *STATE_PROG_ARGV (sd)
+ : NULL), abfd) != SIM_RC_OK)
{
- case 0: /* 00: unified memory */
- *phys = SIM_CR16_MEMORY_UNIFIED + (segno << 17) + offset;
- last_to = "unified";
- break;
- case 1: /* 01: instruction memory */
- *phys = SIM_CR16_MEMORY_INSN + (IMAP_BLOCK_SIZE * regno) + offset;
- last_to = "chip-insn";
- break;
- case 2: /*10*/
- /* Reserved. */
+ free_state (sd);
return 0;
- case 3: /* 11: for testing - instruction memory */
- offset = (offset % 0x800);
- *phys = SIM_CR16_MEMORY_INSN + offset;
- if (offset + nr_bytes > 0x800)
- /* don't cross VM boundary */
- nr_bytes = 0x800 - offset;
- last_to = "test-insn";
- break;
}
- return nr_bytes;
-}
-
-unsigned long
-sim_cr16_translate_addr (unsigned long memaddr, int nr_bytes,
- unsigned long *targ_addr, void *regcache,
- unsigned long (*dmap_register) (void *regcache,
- int reg_nr),
- unsigned long (*imap_register) (void *regcache,
- int reg_nr))
-{
- unsigned long phys;
- unsigned long seg;
- unsigned long off;
-
- last_from = "unknown";
- last_to = "unknown";
- seg = (memaddr >> 24);
- off = (memaddr & 0xffffffL);
-
- /* However, if we've asked to use the previous generation of segment
- mapping, rearrange the segments as follows. */
-
- if (old_segment_mapping)
+ /* Configure/verify the target byte order and other runtime
+ configuration options. */
+ if (sim_config (sd) != SIM_RC_OK)
{
- switch (seg)
- {
- case 0x00: /* DMAP translated memory */
- seg = 0x10;
- break;
- case 0x01: /* IMAP translated memory */
- seg = 0x11;
- break;
- case 0x10: /* On-chip data memory */
- seg = 0x02;
- break;
- case 0x11: /* On-chip insn memory */
- seg = 0x01;
- break;
- case 0x12: /* Unified memory */
- seg = 0x00;
- break;
- }
+ sim_module_uninstall (sd);
+ return 0;
}
- switch (seg)
+ if (sim_post_argv_init (sd) != SIM_RC_OK)
{
- case 0x00: /* Physical unified memory */
- last_from = "phys-unified";
- last_to = "unified";
- phys = SIM_CR16_MEMORY_UNIFIED + off;
- if ((off % SEGMENT_SIZE) + nr_bytes > SEGMENT_SIZE)
- nr_bytes = SEGMENT_SIZE - (off % SEGMENT_SIZE);
- break;
-
- case 0x01: /* Physical instruction memory */
- last_from = "phys-insn";
- last_to = "chip-insn";
- phys = SIM_CR16_MEMORY_INSN + off;
- if ((off % SEGMENT_SIZE) + nr_bytes > SEGMENT_SIZE)
- nr_bytes = SEGMENT_SIZE - (off % SEGMENT_SIZE);
- break;
-
- case 0x02: /* Physical data memory segment */
- last_from = "phys-data";
- last_to = "chip-data";
- phys = SIM_CR16_MEMORY_DATA + off;
- if ((off % SEGMENT_SIZE) + nr_bytes > SEGMENT_SIZE)
- nr_bytes = SEGMENT_SIZE - (off % SEGMENT_SIZE);
- break;
-
- case 0x10: /* in logical data address segment */
- nr_bytes = sim_cr16_translate_dmap_addr (off, nr_bytes, &phys, regcache,
- dmap_register);
- break;
-
- case 0x11: /* in logical instruction address segment */
- nr_bytes = sim_cr16_translate_imap_addr (off, nr_bytes, &phys, regcache,
- imap_register);
- break;
-
- default:
+ /* Uninstall the modules to avoid memory leaks,
+ file descriptor leaks, etc. */
+ sim_module_uninstall (sd);
return 0;
}
- *targ_addr = phys;
- return nr_bytes;
-}
-
-/* Return a pointer into the raw buffer designated by phys_addr. It
- is assumed that the client has already ensured that the access
- isn't going to cross a segment boundary. */
-
-uint8 *
-map_memory (unsigned phys_addr)
-{
- uint8 **memory;
- uint8 *raw;
- unsigned offset;
- int segment = ((phys_addr >> 24) & 0xff);
-
- switch (segment)
- {
-
- case 0x00: /* Unified memory */
- {
- memory = &State.mem.unif[(phys_addr / SEGMENT_SIZE) % UMEM_SEGMENTS];
- last_segname = "umem";
- break;
- }
-
- case 0x01: /* On-chip insn memory */
- {
- memory = &State.mem.insn[(phys_addr / SEGMENT_SIZE) % IMEM_SEGMENTS];
- last_segname = "imem";
- break;
- }
-
- case 0x02: /* On-chip data memory */
- {
- if ((phys_addr & 0xff00) == 0xff00)
- {
- phys_addr = (phys_addr & 0xffff);
- if (phys_addr == DMAP2_SHADDOW)
- {
- phys_addr = DMAP2_OFFSET;
- last_segname = "dmap";
- }
- else
- last_segname = "reg";
- }
- else
- last_segname = "dmem";
- memory = &State.mem.data[(phys_addr / SEGMENT_SIZE) % DMEM_SEGMENTS];
- break;
- }
-
- default:
- /* OOPS! */
- last_segname = "scrap";
- return State.mem.fault;
- }
-
- if (*memory == NULL)
+ /* CPU specific initialization. */
+ for (i = 0; i < MAX_NR_PROCESSORS; ++i)
{
- *memory = calloc (1, SEGMENT_SIZE);
- if (*memory == NULL)
- {
- (*cr16_callback->printf_filtered) (cr16_callback, "Malloc failed.\n");
- return State.mem.fault;
- }
- }
-
- offset = (phys_addr % SEGMENT_SIZE);
- raw = *memory + offset;
- return raw;
-}
-
-/* Transfer data to/from simulated memory. Since a bug in either the
- simulated program or in gdb or the simulator itself may cause a
- bogus address to be passed in, we need to do some sanity checking
- on addresses to make sure they are within bounds. When an address
- fails the bounds check, treat it as a zero length read/write rather
- than aborting the entire run. */
-
-static int
-xfer_mem (SIM_ADDR virt,
- unsigned char *buffer,
- int size,
- int write_p)
-{
- uint8 *memory;
- unsigned long phys;
- int phys_size;
- phys_size = sim_cr16_translate_addr (virt, size, &phys, NULL,
- dmap_register, imap_register);
- if (phys_size == 0)
- return 0;
-
- memory = map_memory (phys);
+ SIM_CPU *cpu = STATE_CPU (sd, i);
-#ifdef DEBUG
- if ((cr16_debug & DEBUG_INSTRUCTION) != 0)
- {
- (*cr16_callback->printf_filtered)
- (cr16_callback,
- "sim_%s %d bytes: 0x%08lx (%s) -> 0x%08lx (%s) -> 0x%08lx (%s)\n",
- (write_p ? "write" : "read"),
- phys_size, virt, last_from,
- phys, last_to,
- (long) memory, last_segname);
- }
-#endif
-
- if (write_p)
- {
- memcpy (memory, buffer, phys_size);
+ CPU_REG_FETCH (cpu) = cr16_reg_fetch;
+ CPU_REG_STORE (cpu) = cr16_reg_store;
+ CPU_PC_FETCH (cpu) = cr16_pc_get;
+ CPU_PC_STORE (cpu) = cr16_pc_set;
}
- else
- {
- memcpy (buffer, memory, phys_size);
- }
-
- return phys_size;
-}
-
-
-int
-sim_write (sd, addr, buffer, size)
- SIM_DESC sd;
- SIM_ADDR addr;
- const unsigned char *buffer;
- int size;
-{
- /* FIXME: this should be performing a virtual transfer */
- 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;
-{
- /* FIXME: this should be performing a virtual transfer */
- return xfer_mem( addr, buffer, size, 0);
-}
-
-SIM_DESC
-sim_open (SIM_OPEN_KIND kind, struct host_callback_struct *callback, struct bfd *abfd, char **argv)
-{
- struct simops *s;
- struct hash_entry *h;
- static int init_p = 0;
- char **p;
- sim_kind = kind;
- cr16_callback = callback;
- myname = argv[0];
- old_segment_mapping = 0;
+ /* The CR16 has an interrupt controller at 0xFC00, but we don't currently
+ handle that. Revisit if anyone ever implements operating mode. */
+ /* 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). This might not match the hardware,
+ but it matches what the toolchain currently expects. Ugh. */
+ sim_do_commandf (sd, "memory-size %#x", 20 * 1024 * 1024);
- /* NOTE: This argument parsing is only effective when this function
- is called by GDB. Standalone argument parsing is handled by
- sim/common/run.c. */
-#if 0
- for (p = argv + 1; *p; ++p)
- {
- if (strcmp (*p, "-oldseg") == 0)
- old_segment_mapping = 1;
-#ifdef DEBUG
- else if (strcmp (*p, "-t") == 0)
- cr16_debug = DEBUG;
- else if (strncmp (*p, "-t", 2) == 0)
- cr16_debug = atoi (*p + 2);
-#endif
- else
- (*cr16_callback->printf_filtered) (cr16_callback, "ERROR: unsupported option(s): %s\n",*p);
- }
-#endif
-
/* put all the opcodes in the hash table. */
if (!init_p++)
{
else
h = &hash_table[hash(s->opcode, 0)];
break;
+
default:
- break;
+ continue;
}
/* go to the last entry in the chain. */
}
}
- /* reset the processor state */
- if (!State.mem.data[0])
- sim_size (1);
- sim_create_inferior ((SIM_DESC) 1, NULL, NULL, NULL);
-
- /* 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);
- prog_bfd = NULL;
- prog_bfd_was_opened_p = 0;
- }
-}
-
-void
-sim_set_profile (int n)
-{
- (*cr16_callback->printf_filtered) (cr16_callback, "sim_set_profile %d\n",n);
+ return sd;
}
-void
-sim_set_profile_size (int n)
+static void
+step_once (SIM_DESC sd, SIM_CPU *cpu)
{
- (*cr16_callback->printf_filtered) (cr16_callback, "sim_set_profile_size %d\n",n);
-}
+ uint32 curr_ins_size = 0;
+ uint64 mcode = RLW (PC);
-uint8 *
-dmem_addr (uint32 offset)
-{
- unsigned long phys;
- uint8 *mem;
- int phys_size;
+ State.pc_changed = 0;
- /* Note: DMEM address range is 0..0x10000. Calling code can compute
- things like ``0xfffe + 0x0e60 == 0x10e5d''. Since offset's type
- is uint16 this is modulo'ed onto 0x0e5d. */
+ curr_ins_size = do_run (sd, cpu, mcode);
- phys_size = sim_cr16_translate_dmap_addr (offset, 1, &phys, NULL,
- dmap_register);
- if (phys_size == 0)
- {
- mem = State.mem.fault;
- }
- else
- mem = map_memory (phys);
-#ifdef DEBUG
- if ((cr16_debug & DEBUG_MEMORY))
- {
- (*cr16_callback->printf_filtered)
- (cr16_callback,
- "mem: 0x%08x (%s) -> 0x%08lx %d (%s) -> 0x%08lx (%s)\n",
- offset, last_from,
- phys, phys_size, last_to,
- (long) mem, last_segname);
- }
+#if CR16_DEBUG
+ sim_io_printf (sd, "INS: PC=0x%X, mcode=0x%X\n", PC, mcode);
#endif
- return mem;
-}
-uint8 *
-imem_addr (uint32 offset)
-{
- unsigned long phys;
- uint8 *mem;
- int phys_size = sim_cr16_translate_imap_addr (offset, 1, &phys, NULL,
- imap_register);
- if (phys_size == 0)
- {
- return State.mem.fault;
- }
- mem = map_memory (phys);
-#ifdef DEBUG
- if ((cr16_debug & DEBUG_MEMORY))
+ if (curr_ins_size == 0)
+ sim_engine_halt (sd, cpu, NULL, PC, sim_exited, GPR (2));
+ else if (!State.pc_changed)
+ SET_PC (PC + (curr_ins_size * 2)); /* For word instructions. */
+
+#if 0
+ /* Check for a breakpoint trap on this instruction. This
+ overrides any pending branches or loops */
+ if (PSR_DB && PC == DBS)
{
- (*cr16_callback->printf_filtered)
- (cr16_callback,
- "mem: 0x%08x (%s) -> 0x%08lx %d (%s) -> 0x%08lx (%s)\n",
- offset, last_from,
- phys, phys_size, last_to,
- (long) mem, last_segname);
+ SET_BPC (PC);
+ SET_BPSR (PSR);
+ SET_PC (SDBT_VECTOR_START);
}
#endif
- return mem;
-}
-
-static int stop_simulator = 0;
-int
-sim_stop (sd)
- SIM_DESC sd;
-{
- stop_simulator = 1;
- return 1;
+ /* Writeback all the DATA / PC changes */
+ SLOT_FLUSH ();
}
-
-/* Run (or resume) the program. */
void
-sim_resume (SIM_DESC sd, int step, int siggnal)
+sim_engine_run (SIM_DESC sd,
+ int next_cpu_nr, /* ignore */
+ int nr_cpus, /* ignore */
+ int siggnal)
{
- uint32 curr_ins_size = 0;
- uint64 mcode = 0;
- uint8 *iaddr;
+ sim_cpu *cpu;
-#ifdef DEBUG
-// (*cr16_callback->printf_filtered) (cr16_callback, "sim_resume (%d,%d) PC=0x%x\n",step,siggnal,PC);
-#endif
+ SIM_ASSERT (STATE_MAGIC (sd) == SIM_MAGIC_NUMBER);
- State.exception = 0;
- if (step)
- sim_stop (sd);
+ cpu = STATE_CPU (sd, 0);
switch (siggnal)
{
case 0:
break;
-#ifdef SIGBUS
- case SIGBUS:
-#endif
- case SIGSEGV:
+ case GDB_SIGNAL_BUS:
+ case GDB_SIGNAL_SEGV:
SET_PC (PC);
SET_PSR (PSR);
JMP (AE_VECTOR_START);
SLOT_FLUSH ();
break;
- case SIGILL:
+ case GDB_SIGNAL_ILL:
SET_PC (PC);
SET_PSR (PSR);
SET_HW_PSR ((PSR & (PSR_C_BIT)));
break;
}
- do
+ while (1)
{
- iaddr = imem_addr ((uint32)PC);
- if (iaddr == State.mem.fault)
- {
- State.exception = SIGBUS;
- break;
- }
-
- mcode = get_longword( iaddr );
-
- State.pc_changed = 0;
-
- curr_ins_size = do_run(mcode);
-
-#if CR16_DEBUG
- (*cr16_callback->printf_filtered) (cr16_callback, "INS: PC=0x%X, mcode=0x%X\n",PC,mcode);
-#endif
-
- if (!State.pc_changed)
- {
- if (curr_ins_size == 0)
- {
- State.exception = SIG_CR16_EXIT; /* exit trap */
- break;
- }
- else
- SET_PC (PC + (curr_ins_size * 2)); /* For word instructions. */
- }
-
-#if 0
- /* Check for a breakpoint trap on this instruction. This
- overrides any pending branches or loops */
- if (PSR_DB && PC == DBS)
- {
- SET_BPC (PC);
- SET_BPSR (PSR);
- SET_PC (SDBT_VECTOR_START);
- }
-#endif
-
- /* Writeback all the DATA / PC changes */
- SLOT_FLUSH ();
-
-#ifdef NEED_UI_LOOP_HOOK
- if (deprecated_ui_loop_hook != NULL && ui_loop_hook_counter-- < 0)
- {
- ui_loop_hook_counter = UI_LOOP_POLL_INTERVAL;
- deprecated_ui_loop_hook (0);
- }
-#endif /* NEED_UI_LOOP_HOOK */
+ step_once (sd, cpu);
+ if (sim_events_tick (sd))
+ sim_events_process (sd);
}
- while ( !State.exception && !stop_simulator);
-
- if (step && !State.exception)
- State.exception = SIGTRAP;
-}
-
-void
-sim_set_trace (void)
-{
-#ifdef DEBUG
- cr16_debug = DEBUG;
-#endif
-}
-
-void
-sim_info (SIM_DESC sd, int verbose)
-{
- char buf1[40];
- char buf2[40];
- char buf3[40];
- char buf4[40];
- char buf5[40];
-#if 0
- 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));
-
- (*cr16_callback->printf_filtered) (cr16_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));
-
- (*cr16_callback->printf_filtered) (cr16_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)
- (*cr16_callback->printf_filtered) (cr16_callback,
- "executed %*s long instruction(s)\n",
- size, add_commas (buf1, sizeof (buf1), ins_long));
-
- if (parallel)
- (*cr16_callback->printf_filtered) (cr16_callback,
- "executed %*s parallel instruction(s)\n",
- size, add_commas (buf1, sizeof (buf1), parallel));
-
- if (leftright)
- (*cr16_callback->printf_filtered) (cr16_callback,
- "executed %*s instruction(s) encoded L->R\n",
- size, add_commas (buf1, sizeof (buf1), leftright));
-
- if (rightleft)
- (*cr16_callback->printf_filtered) (cr16_callback,
- "executed %*s instruction(s) encoded R->L\n",
- size, add_commas (buf1, sizeof (buf1), rightleft));
-
- if (unknown)
- (*cr16_callback->printf_filtered) (cr16_callback,
- "executed %*s unknown instruction(s)\n",
- size, add_commas (buf1, sizeof (buf1), unknown));
-
- if (cond_true)
- (*cr16_callback->printf_filtered) (cr16_callback,
- "executed %*s instruction(s) due to EXExxx condition being true\n",
- size, add_commas (buf1, sizeof (buf1), cond_true));
-
- if (cond_false)
- (*cr16_callback->printf_filtered) (cr16_callback,
- "skipped %*s instruction(s) due to EXExxx condition being false\n",
- size, add_commas (buf1, sizeof (buf1), cond_false));
-
- if (cond_jump)
- (*cr16_callback->printf_filtered) (cr16_callback,
- "skipped %*s instruction(s) due to conditional branch succeeding\n",
- size, add_commas (buf1, sizeof (buf1), cond_jump));
-
- (*cr16_callback->printf_filtered) (cr16_callback,
- "executed %*s cycle(s)\n",
- size, add_commas (buf1, sizeof (buf1), cycles));
-
- (*cr16_callback->printf_filtered) (cr16_callback,
- "executed %*s total instructions\n",
- size, add_commas (buf1, sizeof (buf1), total));
-#endif
}
SIM_RC
-sim_create_inferior (SIM_DESC sd, struct bfd *abfd, char **argv, char **env)
+sim_create_inferior (SIM_DESC sd, struct bfd *abfd,
+ char * const *argv, char * const *env)
{
bfd_vma start_address;
/* reset all state information */
- memset (&State.regs, 0, (int)&State.mem - (int)&State.regs);
+ memset (&State, 0, sizeof (State));
/* There was a hack here to copy the values of argc and argv into r0
and r1. The values were also saved into some high memory that
start_address = 0x0;
#ifdef DEBUG
if (cr16_debug)
- (*cr16_callback->printf_filtered) (cr16_callback, "sim_create_inferior: PC=0x%lx\n", (long) start_address);
+ sim_io_printf (sd, "sim_create_inferior: PC=0x%" BFD_VMA_FMT "x\n",
+ start_address);
#endif
- SET_CREG (PC_CR, start_address);
+ {
+ SIM_CPU *cpu = STATE_CPU (sd, 0);
+ SET_CREG (PC_CR, start_address);
+ }
SLOT_FLUSH ();
return SIM_RC_OK;
}
-
-void
-sim_set_callbacks (p)
- host_callback *p;
+static uint32
+cr16_extract_unsigned_integer (unsigned char *addr, int len)
{
- cr16_callback = p;
+ uint32 retval;
+ unsigned char * p;
+ unsigned char * startaddr = (unsigned char *)addr;
+ unsigned char * endaddr = startaddr + len;
+
+ retval = 0;
+
+ for (p = endaddr; p > startaddr;)
+ retval = (retval << 8) | *--p;
+
+ return retval;
}
-void
-sim_stop_reason (sd, reason, sigrc)
- SIM_DESC sd;
- enum sim_stop *reason;
- int *sigrc;
+static void
+cr16_store_unsigned_integer (unsigned char *addr, int len, uint32 val)
{
-/* (*cr16_callback->printf_filtered) (cr16_callback, "sim_stop_reason: PC=0x%x\n",PC<<2); */
+ unsigned char *p;
+ unsigned char *startaddr = addr;
+ unsigned char *endaddr = startaddr + len;
- switch (State.exception)
+ for (p = startaddr; p < endaddr;)
{
- case SIG_CR16_STOP: /* stop instruction */
- *reason = sim_stopped;
- *sigrc = 0;
- break;
-
- case SIG_CR16_EXIT: /* exit trap */
- *reason = sim_exited;
- *sigrc = GPR (2);
- break;
-
- case SIG_CR16_BUS:
- *reason = sim_stopped;
- *sigrc = TARGET_SIGNAL_BUS;
- break;
-//
-// case SIG_CR16_IAD:
-// *reason = sim_stopped;
-// *sigrc = TARGET_SIGNAL_IAD;
-// break;
-
- default: /* some signal */
- *reason = sim_stopped;
- if (stop_simulator && !State.exception)
- *sigrc = TARGET_SIGNAL_INT;
- else
- *sigrc = State.exception;
- break;
+ *p++ = val & 0xff;
+ val >>= 8;
}
-
- stop_simulator = 0;
}
-int
-sim_fetch_register (sd, rn, memory, length)
- SIM_DESC sd;
- int rn;
- unsigned char *memory;
- int length;
+static int
+cr16_reg_fetch (SIM_CPU *cpu, int rn, unsigned char *memory, int length)
{
int size;
switch ((enum sim_cr16_regs) rn)
case SIM_CR16_R9_REGNUM:
case SIM_CR16_R10_REGNUM:
case SIM_CR16_R11_REGNUM:
- WRITE_16 (memory, GPR (rn - SIM_CR16_R0_REGNUM));
+ cr16_store_unsigned_integer (memory, 2, GPR (rn - SIM_CR16_R0_REGNUM));
size = 2;
break;
case SIM_CR16_R12_REGNUM:
case SIM_CR16_R13_REGNUM:
case SIM_CR16_R14_REGNUM:
case SIM_CR16_R15_REGNUM:
- //WRITE_32 (memory, GPR (rn - SIM_CR16_R0_REGNUM));
- write_longword (memory, GPR (rn - SIM_CR16_R0_REGNUM));
+ cr16_store_unsigned_integer (memory, 4, GPR (rn - SIM_CR16_R0_REGNUM));
size = 4;
break;
case SIM_CR16_PC_REGNUM:
case SIM_CR16_DSR_REGNUM:
case SIM_CR16_CAR0_REGNUM:
case SIM_CR16_CAR1_REGNUM:
- //WRITE_32 (memory, CREG (rn - SIM_CR16_PC_REGNUM));
- write_longword (memory, CREG (rn - SIM_CR16_PC_REGNUM));
+ cr16_store_unsigned_integer (memory, 4, CREG (rn - SIM_CR16_PC_REGNUM));
size = 4;
break;
default:
}
return size;
}
-
-int
-sim_store_register (sd, rn, memory, length)
- SIM_DESC sd;
- int rn;
- unsigned char *memory;
- int length;
+
+static int
+cr16_reg_store (SIM_CPU *cpu, int rn, unsigned char *memory, int length)
{
+ SIM_DESC sd = CPU_STATE (cpu);
int size;
switch ((enum sim_cr16_regs) rn)
{
case SIM_CR16_R9_REGNUM:
case SIM_CR16_R10_REGNUM:
case SIM_CR16_R11_REGNUM:
- SET_GPR (rn - SIM_CR16_R0_REGNUM, READ_16 (memory));
+ SET_GPR (rn - SIM_CR16_R0_REGNUM, cr16_extract_unsigned_integer (memory, 2));
size = 2;
break;
case SIM_CR16_R12_REGNUM:
case SIM_CR16_R13_REGNUM:
case SIM_CR16_R14_REGNUM:
case SIM_CR16_R15_REGNUM:
- SET_GPR32 (rn - SIM_CR16_R0_REGNUM, get_longword (memory));
+ SET_GPR32 (rn - SIM_CR16_R0_REGNUM, cr16_extract_unsigned_integer (memory, 2));
size = 4;
break;
case SIM_CR16_PC_REGNUM:
case SIM_CR16_DSR_REGNUM:
case SIM_CR16_CAR0_REGNUM:
case SIM_CR16_CAR1_REGNUM:
- SET_CREG (rn - SIM_CR16_PC_REGNUM, get_longword (memory));
+ SET_CREG (rn - SIM_CR16_PC_REGNUM, cr16_extract_unsigned_integer (memory, 4));
size = 4;
break;
default:
SLOT_FLUSH ();
return size;
}
-
-
-void
-sim_do_command (sd, cmd)
- SIM_DESC sd;
- char *cmd;
-{
- (*cr16_callback->printf_filtered) (cr16_callback, "sim_do_command: %s\n",cmd);
-}
-
-SIM_RC
-sim_load (SIM_DESC sd, char *prog, struct 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_was_opened_p = 0;
- }
- prog_bfd = sim_load_file (sd, myname, cr16_callback, prog, abfd,
- sim_kind == SIM_OPEN_DEBUG,
- 1/*LMA*/, sim_write);
- if (prog_bfd == NULL)
- return SIM_RC_FAIL;
- prog_bfd_was_opened_p = abfd == NULL;
- return SIM_RC_OK;
-}
projects / thirdparty / binutils-gdb.git / blobdiff