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sim: avr: invert sim_cpu storage

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This commit is contained in:
Mike Frysinger 2016-08-13 00:43:58 +08:00
parent 778ef9bcbb
commit f246dc7285
2 changed files with 108 additions and 99 deletions
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199
sim/avr/interp.c
View File

@ -729,19 +729,20 @@ static void
do_call (SIM_CPU *cpu, unsigned int npc)
{
const struct avr_sim_state *state = AVR_SIM_STATE (CPU_STATE (cpu));
struct avr_sim_cpu *avr_cpu = AVR_SIM_CPU (cpu);
unsigned int sp = read_word (REG_SP);
/* Big endian! */
sram[sp--] = cpu->pc;
sram[sp--] = cpu->pc >> 8;
sram[sp--] = avr_cpu->pc;
sram[sp--] = avr_cpu->pc >> 8;
if (state->avr_pc22)
{
sram[sp--] = cpu->pc >> 16;
cpu->cycles++;
sram[sp--] = avr_cpu->pc >> 16;
avr_cpu->cycles++;
}
write_word (REG_SP, sp);
cpu->pc = npc & PC_MASK;
cpu->cycles += 3;
avr_cpu->pc = npc & PC_MASK;
avr_cpu->cycles += 3;
}
static int
@ -775,18 +776,21 @@ get_lpm (unsigned int addr)
static void
gen_mul (SIM_CPU *cpu, unsigned int res)
{
struct avr_sim_cpu *avr_cpu = AVR_SIM_CPU (cpu);
write_word (0, res);
sram[SREG] &= ~(SREG_Z | SREG_C);
if (res == 0)
sram[SREG] |= SREG_Z;
if (res & 0x8000)
sram[SREG] |= SREG_C;
cpu->cycles++;
avr_cpu->cycles++;
}
static void
step_once (SIM_CPU *cpu)
{
struct avr_sim_cpu *avr_cpu = AVR_SIM_CPU (cpu);
unsigned int ipc;
int code;
@ -795,8 +799,8 @@ step_once (SIM_CPU *cpu)
byte r, d, vd;
again:
code = flash[cpu->pc].code;
op = flash[cpu->pc].op;
code = flash[avr_cpu->pc].code;
op = flash[avr_cpu->pc].op;
#if 0
if (tracing && code != OP_unknown)
@ -829,27 +833,27 @@ step_once (SIM_CPU *cpu)
}
if (!tracing)
sim_cb_eprintf (callback, "%06x: %04x\n", 2 * cpu->pc, flash[cpu->pc].op);
sim_cb_eprintf (callback, "%06x: %04x\n", 2 * avr_cpu->pc, flash[avr_cpu->pc].op);
else
{
sim_cb_eprintf (callback, "pc=0x%06x insn=0x%04x code=%d r=%d\n",
2 * cpu->pc, flash[cpu->pc].op, code, flash[cpu->pc].r);
disassemble_insn (CPU_STATE (cpu), cpu->pc);
2 * avr_cpu->pc, flash[avr_cpu->pc].op, code, flash[avr_cpu->pc].r);
disassemble_insn (CPU_STATE (cpu), avr_cpu->pc);
sim_cb_eprintf (callback, "\n");
}
}
#endif
ipc = cpu->pc;
cpu->pc = (cpu->pc + 1) & PC_MASK;
cpu->cycles++;
ipc = avr_cpu->pc;
avr_cpu->pc = (avr_cpu->pc + 1) & PC_MASK;
avr_cpu->cycles++;
switch (code)
{
case OP_unknown:
flash[ipc].code = decode(ipc);
cpu->pc = ipc;
cpu->cycles--;
avr_cpu->pc = ipc;
avr_cpu->cycles--;
goto again;
case OP_nop:
@ -857,23 +861,23 @@ step_once (SIM_CPU *cpu)
case OP_jmp:
/* 2 words instruction, but we don't care about the pc. */
cpu->pc = ((flash[ipc].r << 16) | flash[ipc + 1].op) & PC_MASK;
cpu->cycles += 2;
avr_cpu->pc = ((flash[ipc].r << 16) | flash[ipc + 1].op) & PC_MASK;
avr_cpu->cycles += 2;
break;
case OP_eijmp:
cpu->pc = ((sram[EIND] << 16) | read_word (REGZ)) & PC_MASK;
cpu->cycles += 2;
avr_cpu->pc = ((sram[EIND] << 16) | read_word (REGZ)) & PC_MASK;
avr_cpu->cycles += 2;
break;
case OP_ijmp:
cpu->pc = read_word (REGZ) & PC_MASK;
cpu->cycles += 1;
avr_cpu->pc = read_word (REGZ) & PC_MASK;
avr_cpu->cycles += 1;
break;
case OP_call:
/* 2 words instruction. */
cpu->pc++;
avr_cpu->pc++;
do_call (cpu, (flash[ipc].r << 16) | flash[ipc + 1].op);
break;
@ -886,7 +890,7 @@ step_once (SIM_CPU *cpu)
break;
case OP_rcall:
do_call (cpu, cpu->pc + sign_ext (op & 0xfff, 12));
do_call (cpu, avr_cpu->pc + sign_ext (op & 0xfff, 12));
break;
case OP_reti:
@ -898,16 +902,16 @@ step_once (SIM_CPU *cpu)
unsigned int sp = read_word (REG_SP);
if (state->avr_pc22)
{
cpu->pc = sram[++sp] << 16;
cpu->cycles++;
avr_cpu->pc = sram[++sp] << 16;
avr_cpu->cycles++;
}
else
cpu->pc = 0;
cpu->pc |= sram[++sp] << 8;
cpu->pc |= sram[++sp];
avr_cpu->pc = 0;
avr_cpu->pc |= sram[++sp] << 8;
avr_cpu->pc |= sram[++sp];
write_word (REG_SP, sp);
}
cpu->cycles += 3;
avr_cpu->cycles += 3;
break;
case OP_break:
@ -935,9 +939,9 @@ step_once (SIM_CPU *cpu)
case OP_sbrs:
if (((sram[get_d (op)] & flash[ipc].r) == 0) ^ ((op & 0x0200) != 0))
{
int l = get_insn_length (cpu->pc);
cpu->pc += l;
cpu->cycles += l;
int l = get_insn_length (avr_cpu->pc);
avr_cpu->pc += l;
avr_cpu->cycles += l;
}
break;
@ -947,7 +951,7 @@ step_once (SIM_CPU *cpu)
sram[sp--] = sram[get_d (op)];
write_word (REG_SP, sp);
}
cpu->cycles++;
avr_cpu->cycles++;
break;
case OP_pop:
@ -956,7 +960,7 @@ step_once (SIM_CPU *cpu)
sram[get_d (op)] = sram[++sp];
write_word (REG_SP, sp);
}
cpu->cycles++;
avr_cpu->cycles++;
break;
case OP_bclr:
@ -968,8 +972,8 @@ step_once (SIM_CPU *cpu)
break;
case OP_rjmp:
cpu->pc = (cpu->pc + sign_ext (op & 0xfff, 12)) & PC_MASK;
cpu->cycles++;
avr_cpu->pc = (avr_cpu->pc + sign_ext (op & 0xfff, 12)) & PC_MASK;
avr_cpu->cycles++;
break;
case OP_eor:
@ -1206,9 +1210,9 @@ step_once (SIM_CPU *cpu)
if (d == STDIO_PORT)
putchar (res);
else if (d == EXIT_PORT)
sim_engine_halt (CPU_STATE (cpu), cpu, NULL, cpu->pc, sim_exited, 0);
sim_engine_halt (CPU_STATE (cpu), cpu, NULL, avr_cpu->pc, sim_exited, 0);
else if (d == ABORT_PORT)
sim_engine_halt (CPU_STATE (cpu), cpu, NULL, cpu->pc, sim_exited, 1);
sim_engine_halt (CPU_STATE (cpu), cpu, NULL, avr_cpu->pc, sim_exited, 1);
break;
case OP_in:
@ -1229,18 +1233,18 @@ step_once (SIM_CPU *cpu)
case OP_sbic:
if (!(sram[get_biA (op) + 0x20] & 1 << get_b(op)))
{
int l = get_insn_length (cpu->pc);
cpu->pc += l;
cpu->cycles += l;
int l = get_insn_length (avr_cpu->pc);
avr_cpu->pc += l;
avr_cpu->cycles += l;
}
break;
case OP_sbis:
if (sram[get_biA (op) + 0x20] & 1 << get_b(op))
{
int l = get_insn_length (cpu->pc);
cpu->pc += l;
cpu->cycles += l;
int l = get_insn_length (avr_cpu->pc);
avr_cpu->pc += l;
avr_cpu->cycles += l;
}
break;
@ -1251,23 +1255,23 @@ step_once (SIM_CPU *cpu)
break;
case OP_lds:
sram[get_d (op)] = sram[flash[cpu->pc].op];
cpu->pc++;
cpu->cycles++;
sram[get_d (op)] = sram[flash[avr_cpu->pc].op];
avr_cpu->pc++;
avr_cpu->cycles++;
break;
case OP_sts:
sram[flash[cpu->pc].op] = sram[get_d (op)];
cpu->pc++;
cpu->cycles++;
sram[flash[avr_cpu->pc].op] = sram[get_d (op)];
avr_cpu->pc++;
avr_cpu->cycles++;
break;
case OP_cpse:
if (sram[get_r (op)] == sram[get_d (op)])
{
int l = get_insn_length (cpu->pc);
cpu->pc += l;
cpu->cycles += l;
int l = get_insn_length (avr_cpu->pc);
avr_cpu->pc += l;
avr_cpu->cycles += l;
}
break;
@ -1304,42 +1308,42 @@ step_once (SIM_CPU *cpu)
case OP_brbc:
if (!(sram[SREG] & flash[ipc].r))
{
cpu->pc = (cpu->pc + get_k (op)) & PC_MASK;
cpu->cycles++;
avr_cpu->pc = (avr_cpu->pc + get_k (op)) & PC_MASK;
avr_cpu->cycles++;
}
break;
case OP_brbs:
if (sram[SREG] & flash[ipc].r)
{
cpu->pc = (cpu->pc + get_k (op)) & PC_MASK;
cpu->cycles++;
avr_cpu->pc = (avr_cpu->pc + get_k (op)) & PC_MASK;
avr_cpu->cycles++;
}
break;
case OP_lpm:
sram[0] = get_lpm (read_word (REGZ));
cpu->cycles += 2;
avr_cpu->cycles += 2;
break;
case OP_lpm_Z:
sram[get_d (op)] = get_lpm (read_word (REGZ));
cpu->cycles += 2;
avr_cpu->cycles += 2;
break;
case OP_lpm_inc_Z:
sram[get_d (op)] = get_lpm (read_word_post_inc (REGZ));
cpu->cycles += 2;
avr_cpu->cycles += 2;
break;
case OP_elpm:
sram[0] = get_lpm (get_z ());
cpu->cycles += 2;
avr_cpu->cycles += 2;
break;
case OP_elpm_Z:
sram[get_d (op)] = get_lpm (get_z ());
cpu->cycles += 2;
avr_cpu->cycles += 2;
break;
case OP_elpm_inc_Z:
@ -1352,97 +1356,97 @@ step_once (SIM_CPU *cpu)
sram[REGZ_HI] = z >> 8;
sram[RAMPZ] = z >> 16;
}
cpu->cycles += 2;
avr_cpu->cycles += 2;
break;
case OP_ld_Z_inc:
sram[get_d (op)] = sram[read_word_post_inc (REGZ) & SRAM_MASK];
cpu->cycles++;
avr_cpu->cycles++;
break;
case OP_ld_dec_Z:
sram[get_d (op)] = sram[read_word_pre_dec (REGZ) & SRAM_MASK];
cpu->cycles++;
avr_cpu->cycles++;
break;
case OP_ld_X_inc:
sram[get_d (op)] = sram[read_word_post_inc (REGX) & SRAM_MASK];
cpu->cycles++;
avr_cpu->cycles++;
break;
case OP_ld_dec_X:
sram[get_d (op)] = sram[read_word_pre_dec (REGX) & SRAM_MASK];
cpu->cycles++;
avr_cpu->cycles++;
break;
case OP_ld_Y_inc:
sram[get_d (op)] = sram[read_word_post_inc (REGY) & SRAM_MASK];
cpu->cycles++;
avr_cpu->cycles++;
break;
case OP_ld_dec_Y:
sram[get_d (op)] = sram[read_word_pre_dec (REGY) & SRAM_MASK];
cpu->cycles++;
avr_cpu->cycles++;
break;
case OP_st_X:
sram[read_word (REGX) & SRAM_MASK] = sram[get_d (op)];
cpu->cycles++;
avr_cpu->cycles++;
break;
case OP_st_X_inc:
sram[read_word_post_inc (REGX) & SRAM_MASK] = sram[get_d (op)];
cpu->cycles++;
avr_cpu->cycles++;
break;
case OP_st_dec_X:
sram[read_word_pre_dec (REGX) & SRAM_MASK] = sram[get_d (op)];
cpu->cycles++;
avr_cpu->cycles++;
break;
case OP_st_Z_inc:
sram[read_word_post_inc (REGZ) & SRAM_MASK] = sram[get_d (op)];
cpu->cycles++;
avr_cpu->cycles++;
break;
case OP_st_dec_Z:
sram[read_word_pre_dec (REGZ) & SRAM_MASK] = sram[get_d (op)];
cpu->cycles++;
avr_cpu->cycles++;
break;
case OP_st_Y_inc:
sram[read_word_post_inc (REGY) & SRAM_MASK] = sram[get_d (op)];
cpu->cycles++;
avr_cpu->cycles++;
break;
case OP_st_dec_Y:
sram[read_word_pre_dec (REGY) & SRAM_MASK] = sram[get_d (op)];
cpu->cycles++;
avr_cpu->cycles++;
break;
case OP_std_Y:
sram[read_word (REGY) + flash[ipc].r] = sram[get_d (op)];
cpu->cycles++;
avr_cpu->cycles++;
break;
case OP_std_Z:
sram[read_word (REGZ) + flash[ipc].r] = sram[get_d (op)];
cpu->cycles++;
avr_cpu->cycles++;
break;
case OP_ldd_Z:
sram[get_d (op)] = sram[read_word (REGZ) + flash[ipc].r];
cpu->cycles++;
avr_cpu->cycles++;
break;
case OP_ldd_Y:
sram[get_d (op)] = sram[read_word (REGY) + flash[ipc].r];
cpu->cycles++;
avr_cpu->cycles++;
break;
case OP_ld_X:
sram[get_d (op)] = sram[read_word (REGX) & SRAM_MASK];
cpu->cycles++;
avr_cpu->cycles++;
break;
case OP_sbiw:
@ -1468,7 +1472,7 @@ step_once (SIM_CPU *cpu)
sram[SREG] |= SREG_S;
write_word (d, wres);
}
cpu->cycles++;
avr_cpu->cycles++;
break;
case OP_adiw:
@ -1494,14 +1498,14 @@ step_once (SIM_CPU *cpu)
sram[SREG] |= SREG_S;
write_word (d, wres);
}
cpu->cycles++;
avr_cpu->cycles++;
break;
case OP_bad:
sim_engine_halt (CPU_STATE (cpu), cpu, NULL, cpu->pc, sim_signalled, SIM_SIGILL);
sim_engine_halt (CPU_STATE (cpu), cpu, NULL, avr_cpu->pc, sim_signalled, SIM_SIGILL);
default:
sim_engine_halt (CPU_STATE (cpu), cpu, NULL, cpu->pc, sim_signalled, SIM_SIGILL);
sim_engine_halt (CPU_STATE (cpu), cpu, NULL, avr_cpu->pc, sim_signalled, SIM_SIGILL);
}
}
@ -1602,6 +1606,7 @@ sim_read (SIM_DESC sd, SIM_ADDR addr, void *buffer, int size)
static int
avr_reg_store (SIM_CPU *cpu, int rn, const void *buf, int length)
{
struct avr_sim_cpu *avr_cpu = AVR_SIM_CPU (cpu);
const unsigned char *memory = buf;
if (rn < 32 && length == 1)
@ -1622,9 +1627,9 @@ avr_reg_store (SIM_CPU *cpu, int rn, const void *buf, int length)
}
if (rn == AVR_PC_REGNUM && length == 4)
{
cpu->pc = (memory[0] >> 1) | (memory[1] << 7)
avr_cpu->pc = (memory[0] >> 1) | (memory[1] << 7)
| (memory[2] << 15) | (memory[3] << 23);
cpu->pc &= PC_MASK;
avr_cpu->pc &= PC_MASK;
return 4;
}
return 0;
@ -1633,6 +1638,7 @@ avr_reg_store (SIM_CPU *cpu, int rn, const void *buf, int length)
static int
avr_reg_fetch (SIM_CPU *cpu, int rn, void *buf, int length)
{
struct avr_sim_cpu *avr_cpu = AVR_SIM_CPU (cpu);
unsigned char *memory = buf;
if (rn < 32 && length == 1)
@ -1653,10 +1659,10 @@ avr_reg_fetch (SIM_CPU *cpu, int rn, void *buf, int length)
}
if (rn == AVR_PC_REGNUM && length == 4)
{
memory[0] = cpu->pc << 1;
memory[1] = cpu->pc >> 7;
memory[2] = cpu->pc >> 15;
memory[3] = cpu->pc >> 23;
memory[0] = avr_cpu->pc << 1;
memory[1] = avr_cpu->pc >> 7;
memory[2] = avr_cpu->pc >> 15;
memory[3] = avr_cpu->pc >> 23;
return 4;
}
return 0;
@ -1665,13 +1671,13 @@ avr_reg_fetch (SIM_CPU *cpu, int rn, void *buf, int length)
static sim_cia
avr_pc_get (sim_cpu *cpu)
{
return cpu->pc;
return AVR_SIM_CPU (cpu)->pc;
}
static void
avr_pc_set (sim_cpu *cpu, sim_cia pc)
{
cpu->pc = pc;
AVR_SIM_CPU (cpu)->pc = pc;
}
static void
@ -1696,7 +1702,8 @@ sim_open (SIM_OPEN_KIND kind, host_callback *cb,
current_target_byte_order = BFD_ENDIAN_LITTLE;
/* The cpu data is kept in a separately allocated chunk of memory. */
if (sim_cpu_alloc_all (sd, 1) != SIM_RC_OK)
if (sim_cpu_alloc_all_extra (sd, 1, sizeof (struct avr_sim_cpu))
!= SIM_RC_OK)
{
free_state (sd);
return 0;

8
sim/avr/sim-main.h
View File

@ -19,20 +19,22 @@ along with this program. If not, see <http://www.gnu.org/licenses/>. */
#ifndef SIM_MAIN_H
#define SIM_MAIN_H
#define SIM_HAVE_COMMON_SIM_CPU
#include "sim-basics.h"
#include "sim-base.h"
struct _sim_cpu {
struct avr_sim_cpu {
/* The only real register. */
uint32_t pc;
/* We update a cycle counter. */
uint32_t cycles;
sim_cpu_base base;
};
#define AVR_SIM_CPU(cpu) ((struct avr_sim_cpu *) CPU_ARCH_DATA (cpu))
struct avr_sim_state {
/* If true, the pc needs more than 2 bytes. */
int avr_pc22;