503 lines
8.4 KiB
C
503 lines
8.4 KiB
C
#include <signal.h>
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#include "sysdep.h"
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#include "bfd.h"
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#include "remote-sim.h"
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#include "callback.h"
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#include "v850_sim.h"
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#define IMEM_SIZE 18 /* V850 instruction memory size is 18 bits */
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#define DMEM_SIZE 16 /* Data memory */
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uint16 OP[4];
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static struct hash_entry *lookup_hash PARAMS ((uint32 ins));
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#define MAX_HASH 63
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struct hash_entry
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{
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struct hash_entry *next;
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long opcode;
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long mask;
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struct simops *ops;
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};
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struct hash_entry hash_table[MAX_HASH+1];
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static long
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hash(insn)
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long insn;
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{
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if ((insn & 0x30) == 0
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|| (insn & 0x38) == 0x10)
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return (insn & 0x07e0) >> 5;
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if ((insn & 0x3c) == 0x18
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|| (insn & 0x3c) == 0x1c
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|| (insn & 0x3c) == 0x20
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|| (insn & 0x3c) == 0x24
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|| (insn & 0x3c) == 0x28
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|| (insn & 0x3c) == 0x23)
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return (insn & 0x07c0) >> 6;
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if ((insn & 0x38) == 0x30)
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return (insn & 0x07e0) >> 5;
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/* What about sub-op field? XXX */
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if ((insn & 0x38) == 0x38)
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return (insn & 0x07e0) >> 5;
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if ((insn & 0x3e) == 0x3c)
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return (insn & 0x07c0) >> 6;
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if ((insn & 0x3f) == 0x3e)
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return (insn & 0xc7e0) >> 5;
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/* Not really correct. XXX */
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return insn & 0xffffffff;
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}
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static struct hash_entry *
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lookup_hash (ins)
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uint32 ins;
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{
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struct hash_entry *h;
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h = &hash_table[hash(ins)];
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while ( (ins & h->mask) != h->opcode)
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{
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if (h->next == NULL)
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{
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printf ("ERROR looking up hash for %x\n",ins);
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exit(1);
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}
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h = h->next;
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}
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return (h);
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}
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uint32
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get_longword (x)
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uint8 *x;
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{
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uint8 *a = x;
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return (a[3]<<24) + (a[2]<<16) + (a[1]<<8) + (a[0]);
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}
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int64
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get_longlong (x)
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uint8 *x;
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{
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uint8 *a = x;
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return ((int64)a[0]<<56) + ((int64)a[1]<<48) + ((int64)a[2]<<40) + ((int64)a[3]<<32) +
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((int64)a[4]<< 24) + ((int64)a[5]<<16) + ((int64)a[6]<<8) + (int64)a[7];
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}
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uint16
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get_word (x)
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uint8 *x;
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{
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uint8 *a = x;
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return ((uint16)a[0]<<8) + a[1];
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}
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void
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write_word (addr, data)
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uint8 *addr;
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uint16 data;
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{
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uint8 *a = addr;
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a[0] = data >> 8;
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a[1] = data & 0xff;
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}
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void
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write_longword (addr, data)
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uint8 *addr;
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uint32 data;
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{
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addr[0] = (data >> 24) & 0xff;
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addr[1] = (data >> 16) & 0xff;
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addr[2] = (data >> 8) & 0xff;
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addr[3] = data & 0xff;
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}
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void
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write_longlong (addr, data)
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uint8 *addr;
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int64 data;
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{
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uint8 *a = addr;
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a[0] = data >> 56;
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a[1] = (data >> 48) & 0xff;
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a[2] = (data >> 40) & 0xff;
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a[3] = (data >> 32) & 0xff;
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a[4] = (data >> 24) & 0xff;
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a[5] = (data >> 16) & 0xff;
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a[6] = (data >> 8) & 0xff;
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a[7] = data & 0xff;
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}
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static void
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get_operands (struct simops *s, uint32 ins)
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{
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int i, shift, bits, flags;
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uint32 mask;
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for (i=0; i < s->numops; i++)
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{
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shift = s->operands[3*i];
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bits = s->operands[3*i+1];
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flags = s->operands[3*i+2];
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mask = 0x7FFFFFFF >> (31 - bits);
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OP[i] = (ins >> shift) & mask;
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}
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}
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static void
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do_format_1_2 (insn)
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uint32 insn;
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{
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struct hash_entry *h;
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printf("format 1 or 2 0x%x\n", insn);
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h = lookup_hash (insn);
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OP[0] = insn & 0x1f;
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OP[1] = (insn >> 11) & 0x1f;
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(h->ops->func) ();
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}
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static void
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do_format_3 (insn)
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uint32 insn;
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{
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struct hash_entry *h;
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printf("format 3 0x%x\n", insn);
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h = lookup_hash (insn);
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OP[0] = (((insn & 0x70) >> 4) | ((insn & 0xf800) >> 8)) << 1;
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(h->ops->func) ();
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}
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static void
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do_format_4 (insn)
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uint32 insn;
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{
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printf("format 4 0x%x\n", insn);
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}
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static void
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do_format_5 (insn)
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uint32 insn;
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{
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printf("format 5 0x%x\n", insn);
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}
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static void
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do_format_6 (insn)
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uint32 insn;
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{
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struct hash_entry *h;
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printf("format 6 0x%x\n", insn);
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h = lookup_hash (insn);
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OP[0] = (insn >> 16) & 0xffff;
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OP[1] = insn & 0x1f;
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OP[2] = (insn >> 11) & 0x1f;
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(h->ops->func) ();
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}
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static void
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do_format_7 (insn)
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uint32 insn;
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{
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printf("format 7 0x%x\n", insn);
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}
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static void
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do_format_8 (insn)
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uint32 insn;
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{
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printf("format 8 0x%x\n", insn);
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}
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static void
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do_formats_9_10 (insn)
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uint32 insn;
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{
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struct hash_entry *h;
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printf("formats 9 and 10 0x%x\n", insn);
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h = lookup_hash (insn);
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OP[0] = insn & 0x1f;
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OP[1] = (insn >> 11) & 0x1f;
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(h->ops->func) ();
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}
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void
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sim_size (power)
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int power;
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{
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if (State.imem)
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{
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free (State.imem);
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free (State.dmem);
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}
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State.imem = (uint8 *)calloc(1,1<<IMEM_SIZE);
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State.dmem = (uint8 *)calloc(1,1<<DMEM_SIZE);
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if (!State.imem || !State.dmem )
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{
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fprintf (stderr,"Memory allocation failed.\n");
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exit(1);
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}
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printf ("Allocated %d bytes instruction memory and\n",1<<IMEM_SIZE);
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printf (" %d bytes data memory.\n",1<<DMEM_SIZE);
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}
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static void
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init_system ()
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{
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if (!State.imem)
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sim_size(1);
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}
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int
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sim_write (addr, buffer, size)
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SIM_ADDR addr;
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unsigned char *buffer;
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int size;
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{
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int i;
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init_system ();
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/* printf ("sim_write %d bytes to 0x%x\n",size,addr); */
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for (i = 0; i < size; i++)
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{
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State.imem[i+addr] = buffer[i];
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}
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return size;
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}
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void
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sim_open (args)
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char *args;
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{
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struct simops *s;
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struct hash_entry *h, *prev;
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if (args != NULL)
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printf ("sim_open %s\n",args);
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/* put all the opcodes in the hash table */
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for (s = Simops; s->func; s++)
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{
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h = &hash_table[hash(s->opcode)];
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/* go to the last entry in the chain */
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while (h->next)
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h = h->next;
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if (h->ops)
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{
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h->next = calloc(1,sizeof(struct hash_entry));
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h = h->next;
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}
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h->ops = s;
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h->mask = s->mask;
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h->opcode = s->opcode;
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}
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}
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void
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sim_close (quitting)
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int quitting;
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{
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/* nothing to do */
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}
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void
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sim_set_profile (n)
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int n;
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{
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printf ("sim_set_profile %d\n",n);
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}
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void
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sim_set_profile_size (n)
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int n;
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{
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printf ("sim_set_profile_size %d\n",n);
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}
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void
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sim_resume (step, siggnal)
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int step, siggnal;
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{
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uint32 inst, opcode;
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int i;
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reg_t oldpc;
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/* printf ("sim_resume (%d,%d) PC=0x%x\n",step,siggnal,PC); */
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if (step)
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State.exception = SIGTRAP;
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else
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State.exception = 0;
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do
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{
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inst = RLW (PC);
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oldpc = PC;
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opcode = (inst & 0x07e0) >> 5;
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if ((opcode & 0x30) == 0
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|| (opcode & 0x38) == 0x10)
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{
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do_format_1_2 (inst & 0xffff);
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PC += 2;
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}
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else if ((opcode & 0x3C) == 0x18
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|| (opcode & 0x3C) == 0x1C
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|| (opcode & 0x3C) == 0x20
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|| (opcode & 0x3C) == 0x24
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|| (opcode & 0x3C) == 0x28)
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{
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do_format_4 (inst & 0xffff);
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PC += 2;
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}
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else if ((opcode & 0x3C) == 0x23)
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{
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do_format_3 (inst & 0xffff);
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/* No PC update, it's done in the instruction. */
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}
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else if ((opcode & 0x38) == 0x30)
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{
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do_format_6 (inst);
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PC += 4;
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}
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else if ((opcode & 0x3C) == 0x38)
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{
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do_format_7 (inst);
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PC += 4;
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}
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else if ((opcode & 0x3E) == 0x3C)
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{
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do_format_5 (inst);
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PC += 4;
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}
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else if ((opcode & 0x3F) == 0x3E)
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{
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do_format_8 (inst);
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PC += 4;
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}
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else
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{
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do_formats_9_10 (inst);
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PC += 4;
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}
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}
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while (!State.exception);
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}
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int
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sim_trace ()
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{
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printf ("sim_trace\n");
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return 0;
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}
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void
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sim_info (verbose)
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int verbose;
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{
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printf ("sim_info\n");
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}
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void
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sim_create_inferior (start_address, argv, env)
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SIM_ADDR start_address;
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char **argv;
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char **env;
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{
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printf ("sim_create_inferior: PC=0x%x\n",start_address);
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PC = start_address;
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}
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void
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sim_kill ()
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{
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/* nothing to do */
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}
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void
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sim_set_callbacks(p)
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host_callback *p;
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{
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printf ("sim_set_callbacks\n");
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/* callback = p; */
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}
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void
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sim_stop_reason (reason, sigrc)
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enum sim_stop *reason;
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int *sigrc;
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{
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/* printf ("sim_stop_reason: PC=0x%x\n",PC); */
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if (State.exception == SIGQUIT)
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{
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*reason = sim_exited;
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*sigrc = State.exception;
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}
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else
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{
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*reason = sim_stopped;
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*sigrc = State.exception;
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}
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}
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void
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sim_fetch_register (rn, memory)
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int rn;
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unsigned char *memory;
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{
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*(uint32 *)memory = State.regs[rn];
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/* printf ("sim_fetch_register %d 0x%x\n",rn,State.regs[rn]); */
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}
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void
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sim_store_register (rn, memory)
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int rn;
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unsigned char *memory;
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{
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State.regs[rn]= *(uint32 *)memory;
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/* printf ("store: r%d=0x%x\n",rn,State.regs[rn]); */
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}
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sim_read (addr, buffer, size)
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SIM_ADDR addr;
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unsigned char *buffer;
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int size;
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{
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int i;
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for (i = 0; i < size; i++)
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{
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buffer[i] = State.imem[addr + i];
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}
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return size;
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}
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void
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sim_do_command (cmd)
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char *cmd;
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{
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printf("sim_do_command: %s\n",cmd);
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}
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int
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sim_load (prog, from_tty)
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char *prog;
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int from_tty;
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{
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/* Return nonzero so GDB will handle it. */
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return 1;
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}
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