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binutils-gdb/sim/ft32/interp.c
Mike Frysinger 1fef66b0dc sim: split sim-signal.h include out 
The sim-basics.h is too big and includes too many things.  This leads
to some arch's sim-main.h having circular loop issues with defs, and
makes it hard to separate out common objects from arch-specific defs.
By splitting up sim-basics.h and killing off sim-main.h, it'll make
it easier to separate out the two.
2021-06-18 00:50:14 -04:00

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/* Simulator for the FT32 processor
Copyright (C) 2008-2021 Free Software Foundation, Inc.
Contributed by FTDI <support@ftdichip.com>
This file is part of simulators.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
/* This must come before any other includes. */
#include "defs.h"
#include <fcntl.h>
#include <signal.h>
#include <stdlib.h>
#include <stdint.h>
#include "bfd.h"
#include "sim/callback.h"
#include "libiberty.h"
#include "sim/sim.h"
#include "sim-main.h"
#include "sim-options.h"
#include "sim-signal.h"
#include "opcode/ft32.h"
/*
* FT32 is a Harvard architecture: RAM and code occupy
* different address spaces.
*
* sim and gdb model FT32 memory by adding 0x800000 to RAM
* addresses. This means that sim/gdb can treat all addresses
* similarly.
*
* The address space looks like:
*
* 00000 start of code memory
* 3ffff end of code memory
* 800000 start of RAM
* 80ffff end of RAM
*/
#define RAM_BIAS 0x800000 /* Bias added to RAM addresses. */
static unsigned long
ft32_extract_unsigned_integer (unsigned char *addr, int len)
{
unsigned long retval;
unsigned char *p;
unsigned char *startaddr = (unsigned char *) addr;
unsigned char *endaddr = startaddr + len;
/* Start at the most significant end of the integer, and work towards
the least significant. */
retval = 0;
for (p = endaddr; p > startaddr;)
retval = (retval << 8) | * -- p;
return retval;
}
static void
ft32_store_unsigned_integer (unsigned char *addr, int len, unsigned long val)
{
unsigned char *p;
unsigned char *startaddr = (unsigned char *)addr;
unsigned char *endaddr = startaddr + len;
for (p = startaddr; p < endaddr; p++)
{
*p = val & 0xff;
val >>= 8;
}
}
/*
* Align EA according to its size DW.
* The FT32 ignores the low bit of a 16-bit addresss,
* and the low two bits of a 32-bit address.
*/
static uint32_t ft32_align (uint32_t dw, uint32_t ea)
{
switch (dw)
{
case 1:
ea &= ~1;
break;
case 2:
ea &= ~3;
break;
default:
break;
}
return ea;
}
/* Read an item from memory address EA, sized DW. */
static uint32_t
ft32_read_item (SIM_DESC sd, int dw, uint32_t ea)
{
sim_cpu *cpu = STATE_CPU (sd, 0);
address_word cia = CPU_PC_GET (cpu);
uint8_t byte[4];
uint32_t r;
ea = ft32_align (dw, ea);
switch (dw) {
case 0:
return sim_core_read_aligned_1 (cpu, cia, read_map, ea);
case 1:
return sim_core_read_aligned_2 (cpu, cia, read_map, ea);
case 2:
return sim_core_read_aligned_4 (cpu, cia, read_map, ea);
default:
abort ();
}
}
/* Write item V to memory address EA, sized DW. */
static void
ft32_write_item (SIM_DESC sd, int dw, uint32_t ea, uint32_t v)
{
sim_cpu *cpu = STATE_CPU (sd, 0);
address_word cia = CPU_PC_GET (cpu);
uint8_t byte[4];
ea = ft32_align (dw, ea);
switch (dw) {
case 0:
sim_core_write_aligned_1 (cpu, cia, write_map, ea, v);
break;
case 1:
sim_core_write_aligned_2 (cpu, cia, write_map, ea, v);
break;
case 2:
sim_core_write_aligned_4 (cpu, cia, write_map, ea, v);
break;
default:
abort ();
}
}
#define ILLEGAL() \
sim_engine_halt (sd, cpu, NULL, insnpc, sim_signalled, SIM_SIGILL)
static uint32_t cpu_mem_read (SIM_DESC sd, uint32_t dw, uint32_t ea)
{
sim_cpu *cpu = STATE_CPU (sd, 0);
uint32_t insnpc = cpu->state.pc;
uint32_t r;
uint8_t byte[4];
ea &= 0x1ffff;
if (ea & ~0xffff)
{
/* Simulate some IO devices */
switch (ea)
{
case 0x10000:
return getchar ();
case 0x1fff4:
/* Read the simulator cycle timer. */
return cpu->state.cycles / 100;
default:
sim_io_eprintf (sd, "Illegal IO read address %08x, pc %#x\n",
ea, insnpc);
ILLEGAL ();
}
}
return ft32_read_item (sd, dw, RAM_BIAS + ea);
}
static void cpu_mem_write (SIM_DESC sd, uint32_t dw, uint32_t ea, uint32_t d)
{
sim_cpu *cpu = STATE_CPU (sd, 0);
ea &= 0x1ffff;
if (ea & 0x10000)
{
/* Simulate some IO devices */
switch (ea)
{
case 0x10000:
/* Console output */
putchar (d & 0xff);
break;
case 0x1fc80:
/* Unlock the PM write port */
cpu->state.pm_unlock = (d == 0x1337f7d1);
break;
case 0x1fc84:
/* Set the PM write address register */
cpu->state.pm_addr = d;
break;
case 0x1fc88:
if (cpu->state.pm_unlock)
{
/* Write to PM. */
ft32_write_item (sd, dw, cpu->state.pm_addr, d);
cpu->state.pm_addr += 4;
}
break;
case 0x1fffc:
/* Normal exit. */
sim_engine_halt (sd, cpu, NULL, cpu->state.pc, sim_exited, cpu->state.regs[0]);
break;
case 0x1fff8:
sim_io_printf (sd, "Debug write %08x\n", d);
break;
default:
sim_io_eprintf (sd, "Unknown IO write %08x to to %08x\n", d, ea);
}
}
else
ft32_write_item (sd, dw, RAM_BIAS + ea, d);
}
#define GET_BYTE(ea) cpu_mem_read (sd, 0, (ea))
#define PUT_BYTE(ea, d) cpu_mem_write (sd, 0, (ea), (d))
/* LSBS (n) is a mask of the least significant N bits. */
#define LSBS(n) ((1U << (n)) - 1)
static void ft32_push (SIM_DESC sd, uint32_t v)
{
sim_cpu *cpu = STATE_CPU (sd, 0);
cpu->state.regs[FT32_HARD_SP] -= 4;
cpu->state.regs[FT32_HARD_SP] &= 0xffff;
cpu_mem_write (sd, 2, cpu->state.regs[FT32_HARD_SP], v);
}
static uint32_t ft32_pop (SIM_DESC sd)
{
sim_cpu *cpu = STATE_CPU (sd, 0);
uint32_t r = cpu_mem_read (sd, 2, cpu->state.regs[FT32_HARD_SP]);
cpu->state.regs[FT32_HARD_SP] += 4;
cpu->state.regs[FT32_HARD_SP] &= 0xffff;
return r;
}
/* Extract the low SIZ bits of N as an unsigned number. */
static int nunsigned (int siz, int n)
{
return n & LSBS (siz);
}
/* Extract the low SIZ bits of N as a signed number. */
static int nsigned (int siz, int n)
{
int shift = (sizeof (int) * 8) - siz;
return (n << shift) >> shift;
}
/* Signed division N / D, matching hw behavior for (MIN_INT, -1). */
static uint32_t ft32sdiv (uint32_t n, uint32_t d)
{
if (n == 0x80000000UL && d == 0xffffffffUL)
return 0x80000000UL;
else
return (uint32_t)((int)n / (int)d);
}
/* Signed modulus N % D, matching hw behavior for (MIN_INT, -1). */
static uint32_t ft32smod (uint32_t n, uint32_t d)
{
if (n == 0x80000000UL && d == 0xffffffffUL)
return 0;
else
return (uint32_t)((int)n % (int)d);
}
/* Circular rotate right N by B bits. */
static uint32_t ror (uint32_t n, uint32_t b)
{
b &= 31;
return (n >> b) | (n << (32 - b));
}
/* Implement the BINS machine instruction.
See FT32 Programmer's Reference for details. */
static uint32_t bins (uint32_t d, uint32_t f, uint32_t len, uint32_t pos)
{
uint32_t bitmask = LSBS (len) << pos;
return (d & ~bitmask) | ((f << pos) & bitmask);
}
/* Implement the FLIP machine instruction.
See FT32 Programmer's Reference for details. */
static uint32_t flip (uint32_t x, uint32_t b)
{
if (b & 1)
x = (x & 0x55555555) << 1 | (x & 0xAAAAAAAA) >> 1;
if (b & 2)
x = (x & 0x33333333) << 2 | (x & 0xCCCCCCCC) >> 2;
if (b & 4)
x = (x & 0x0F0F0F0F) << 4 | (x & 0xF0F0F0F0) >> 4;
if (b & 8)
x = (x & 0x00FF00FF) << 8 | (x & 0xFF00FF00) >> 8;
if (b & 16)
x = (x & 0x0000FFFF) << 16 | (x & 0xFFFF0000) >> 16;
return x;
}
static void
step_once (SIM_DESC sd)
{
sim_cpu *cpu = STATE_CPU (sd, 0);
address_word cia = CPU_PC_GET (cpu);
uint32_t inst;
uint32_t dw;
uint32_t cb;
uint32_t r_d;
uint32_t cr;
uint32_t cv;
uint32_t bt;
uint32_t r_1;
uint32_t rimm;
uint32_t r_2;
uint32_t k20;
uint32_t pa;
uint32_t aa;
uint32_t k16;
uint32_t k15;
uint32_t al;
uint32_t r_1v;
uint32_t rimmv;
uint32_t bit_pos;
uint32_t bit_len;
uint32_t upper;
uint32_t insnpc;
unsigned int sc[2];
int isize;
inst = ft32_read_item (sd, 2, cpu->state.pc);
cpu->state.cycles += 1;
if ((STATE_ARCHITECTURE (sd)->mach == bfd_mach_ft32b)
&& ft32_decode_shortcode (cpu->state.pc, inst, sc))
{
if ((cpu->state.pc & 3) == 0)
inst = sc[0];
else
inst = sc[1];
isize = 2;
}
else
isize = 4;
/* Handle "call 8" (which is FT32's "break" equivalent) here. */
if (inst == 0x00340002)
{
sim_engine_halt (sd, cpu, NULL,
cpu->state.pc,
sim_stopped, SIM_SIGTRAP);
goto escape;
}
dw = (inst >> FT32_FLD_DW_BIT) & LSBS (FT32_FLD_DW_SIZ);
cb = (inst >> FT32_FLD_CB_BIT) & LSBS (FT32_FLD_CB_SIZ);
r_d = (inst >> FT32_FLD_R_D_BIT) & LSBS (FT32_FLD_R_D_SIZ);
cr = (inst >> FT32_FLD_CR_BIT) & LSBS (FT32_FLD_CR_SIZ);
cv = (inst >> FT32_FLD_CV_BIT) & LSBS (FT32_FLD_CV_SIZ);
bt = (inst >> FT32_FLD_BT_BIT) & LSBS (FT32_FLD_BT_SIZ);
r_1 = (inst >> FT32_FLD_R_1_BIT) & LSBS (FT32_FLD_R_1_SIZ);
rimm = (inst >> FT32_FLD_RIMM_BIT) & LSBS (FT32_FLD_RIMM_SIZ);
r_2 = (inst >> FT32_FLD_R_2_BIT) & LSBS (FT32_FLD_R_2_SIZ);
k20 = nsigned (20, (inst >> FT32_FLD_K20_BIT) & LSBS (FT32_FLD_K20_SIZ));
pa = (inst >> FT32_FLD_PA_BIT) & LSBS (FT32_FLD_PA_SIZ);
aa = (inst >> FT32_FLD_AA_BIT) & LSBS (FT32_FLD_AA_SIZ);
k16 = (inst >> FT32_FLD_K16_BIT) & LSBS (FT32_FLD_K16_SIZ);
k15 = (inst >> FT32_FLD_K15_BIT) & LSBS (FT32_FLD_K15_SIZ);
if (k15 & 0x80)
k15 ^= 0x7f00;
if (k15 & 0x4000)
k15 -= 0x8000;
al = (inst >> FT32_FLD_AL_BIT) & LSBS (FT32_FLD_AL_SIZ);
r_1v = cpu->state.regs[r_1];
rimmv = (rimm & 0x400) ? nsigned (10, rimm) : cpu->state.regs[rimm & 0x1f];
bit_pos = rimmv & 31;
bit_len = 0xf & (rimmv >> 5);
if (bit_len == 0)
bit_len = 16;
upper = (inst >> 27);
insnpc = cpu->state.pc;
cpu->state.pc += isize;
switch (upper)
{
case FT32_PAT_TOC:
case FT32_PAT_TOCI:
{
int take = (cr == 3) || ((1 & (cpu->state.regs[28 + cr] >> cb)) == cv);
if (take)
{
cpu->state.cycles += 1;
if (bt)
ft32_push (sd, cpu->state.pc); /* this is a call. */
if (upper == FT32_PAT_TOC)
cpu->state.pc = pa << 2;
else
cpu->state.pc = cpu->state.regs[r_2];
if (cpu->state.pc == 0x8)
goto escape;
}
}
break;
case FT32_PAT_ALUOP:
case FT32_PAT_CMPOP:
{
uint32_t result;
switch (al)
{
case 0x0: result = r_1v + rimmv; break;
case 0x1: result = ror (r_1v, rimmv); break;
case 0x2: result = r_1v - rimmv; break;
case 0x3: result = (r_1v << 10) | (1023 & rimmv); break;
case 0x4: result = r_1v & rimmv; break;
case 0x5: result = r_1v | rimmv; break;
case 0x6: result = r_1v ^ rimmv; break;
case 0x7: result = ~(r_1v ^ rimmv); break;
case 0x8: result = r_1v << rimmv; break;
case 0x9: result = r_1v >> rimmv; break;
case 0xa: result = (int32_t)r_1v >> rimmv; break;
case 0xb: result = bins (r_1v, rimmv >> 10, bit_len, bit_pos); break;
case 0xc: result = nsigned (bit_len, r_1v >> bit_pos); break;
case 0xd: result = nunsigned (bit_len, r_1v >> bit_pos); break;
case 0xe: result = flip (r_1v, rimmv); break;
default:
sim_io_eprintf (sd, "Unhandled alu %#x\n", al);
ILLEGAL ();
}
if (upper == FT32_PAT_ALUOP)
cpu->state.regs[r_d] = result;
else
{
uint32_t dwmask = 0;
int dwsiz = 0;
int zero;
int sign;
int ahi;
int bhi;
int overflow;
int carry;
int bit;
uint64_t ra;
uint64_t rb;
int above;
int greater;
int greatereq;
switch (dw)
{
case 0: dwsiz = 7; dwmask = 0xffU; break;
case 1: dwsiz = 15; dwmask = 0xffffU; break;
case 2: dwsiz = 31; dwmask = 0xffffffffU; break;
}
zero = (0 == (result & dwmask));
sign = 1 & (result >> dwsiz);
ahi = 1 & (r_1v >> dwsiz);
bhi = 1 & (rimmv >> dwsiz);
overflow = (sign != ahi) & (ahi == !bhi);
bit = (dwsiz + 1);
ra = r_1v & dwmask;
rb = rimmv & dwmask;
switch (al)
{
case 0x0: carry = 1 & ((ra + rb) >> bit); break;
case 0x2: carry = 1 & ((ra - rb) >> bit); break;
default: carry = 0; break;
}
above = (!carry & !zero);
greater = (sign == overflow) & !zero;
greatereq = (sign == overflow);
cpu->state.regs[r_d] = (
(above << 6) |
(greater << 5) |
(greatereq << 4) |
(sign << 3) |
(overflow << 2) |
(carry << 1) |
(zero << 0));
}
}
break;
case FT32_PAT_LDK:
cpu->state.regs[r_d] = k20;
break;
case FT32_PAT_LPM:
cpu->state.regs[r_d] = ft32_read_item (sd, dw, pa << 2);
cpu->state.cycles += 1;
break;
case FT32_PAT_LPMI:
cpu->state.regs[r_d] = ft32_read_item (sd, dw, cpu->state.regs[r_1] + k15);
cpu->state.cycles += 1;
break;
case FT32_PAT_STA:
cpu_mem_write (sd, dw, aa, cpu->state.regs[r_d]);
break;
case FT32_PAT_STI:
cpu_mem_write (sd, dw, cpu->state.regs[r_d] + k15, cpu->state.regs[r_1]);
break;
case FT32_PAT_LDA:
cpu->state.regs[r_d] = cpu_mem_read (sd, dw, aa);
cpu->state.cycles += 1;
break;
case FT32_PAT_LDI:
cpu->state.regs[r_d] = cpu_mem_read (sd, dw, cpu->state.regs[r_1] + k15);
cpu->state.cycles += 1;
break;
case FT32_PAT_EXA:
{
uint32_t tmp;
tmp = cpu_mem_read (sd, dw, aa);
cpu_mem_write (sd, dw, aa, cpu->state.regs[r_d]);
cpu->state.regs[r_d] = tmp;
cpu->state.cycles += 1;
}
break;
case FT32_PAT_EXI:
{
uint32_t tmp;
tmp = cpu_mem_read (sd, dw, cpu->state.regs[r_1] + k15);
cpu_mem_write (sd, dw, cpu->state.regs[r_1] + k15, cpu->state.regs[r_d]);
cpu->state.regs[r_d] = tmp;
cpu->state.cycles += 1;
}
break;
case FT32_PAT_PUSH:
ft32_push (sd, r_1v);
break;
case FT32_PAT_LINK:
ft32_push (sd, cpu->state.regs[r_d]);
cpu->state.regs[r_d] = cpu->state.regs[FT32_HARD_SP];
cpu->state.regs[FT32_HARD_SP] -= k16;
cpu->state.regs[FT32_HARD_SP] &= 0xffff;
break;
case FT32_PAT_UNLINK:
cpu->state.regs[FT32_HARD_SP] = cpu->state.regs[r_d];
cpu->state.regs[FT32_HARD_SP] &= 0xffff;
cpu->state.regs[r_d] = ft32_pop (sd);
break;
case FT32_PAT_POP:
cpu->state.cycles += 1;
cpu->state.regs[r_d] = ft32_pop (sd);
break;
case FT32_PAT_RETURN:
cpu->state.pc = ft32_pop (sd);
break;
case FT32_PAT_FFUOP:
switch (al)
{
case 0x0:
cpu->state.regs[r_d] = r_1v / rimmv;
break;
case 0x1:
cpu->state.regs[r_d] = r_1v % rimmv;
break;
case 0x2:
cpu->state.regs[r_d] = ft32sdiv (r_1v, rimmv);
break;
case 0x3:
cpu->state.regs[r_d] = ft32smod (r_1v, rimmv);
break;
case 0x4:
{
/* strcmp instruction. */
uint32_t a = r_1v;
uint32_t b = rimmv;
uint32_t i = 0;
while ((GET_BYTE (a + i) != 0) &&
(GET_BYTE (a + i) == GET_BYTE (b + i)))
i++;
cpu->state.regs[r_d] = GET_BYTE (a + i) - GET_BYTE (b + i);
}
break;
case 0x5:
{
/* memcpy instruction. */
uint32_t src = r_1v;
uint32_t dst = cpu->state.regs[r_d];
uint32_t i;
for (i = 0; i < (rimmv & 0x7fff); i++)
PUT_BYTE (dst + i, GET_BYTE (src + i));
}
break;
case 0x6:
{
/* strlen instruction. */
uint32_t src = r_1v;
uint32_t i;
for (i = 0; GET_BYTE (src + i) != 0; i++)
;
cpu->state.regs[r_d] = i;
}
break;
case 0x7:
{
/* memset instruction. */
uint32_t dst = cpu->state.regs[r_d];
uint32_t i;
for (i = 0; i < (rimmv & 0x7fff); i++)
PUT_BYTE (dst + i, r_1v);
}
break;
case 0x8:
cpu->state.regs[r_d] = r_1v * rimmv;
break;
case 0x9:
cpu->state.regs[r_d] = ((uint64_t)r_1v * (uint64_t)rimmv) >> 32;
break;
case 0xa:
{
/* stpcpy instruction. */
uint32_t src = r_1v;
uint32_t dst = cpu->state.regs[r_d];
uint32_t i;
for (i = 0; GET_BYTE (src + i) != 0; i++)
PUT_BYTE (dst + i, GET_BYTE (src + i));
PUT_BYTE (dst + i, 0);
cpu->state.regs[r_d] = dst + i;
}
break;
case 0xe:
{
/* streamout instruction. */
uint32_t i;
uint32_t src = cpu->state.regs[r_1];
for (i = 0; i < rimmv; i += (1 << dw))
{
cpu_mem_write (sd,
dw,
cpu->state.regs[r_d],
cpu_mem_read (sd, dw, src));
src += (1 << dw);
}
}
break;
default:
sim_io_eprintf (sd, "Unhandled ffu %#x at %08x\n", al, insnpc);
ILLEGAL ();
}
break;
default:
sim_io_eprintf (sd, "Unhandled pattern %d at %08x\n", upper, insnpc);
ILLEGAL ();
}
cpu->state.num_i++;
escape:
;
}
void
sim_engine_run (SIM_DESC sd,
int next_cpu_nr, /* ignore */
int nr_cpus, /* ignore */
int siggnal) /* ignore */
{
sim_cpu *cpu;
SIM_ASSERT (STATE_MAGIC (sd) == SIM_MAGIC_NUMBER);
cpu = STATE_CPU (sd, 0);
while (1)
{
step_once (sd);
if (sim_events_tick (sd))
sim_events_process (sd);
}
}
static uint32_t *
ft32_lookup_register (SIM_CPU *cpu, int nr)
{
/* Handle the register number translation here.
* Sim registers are 0-31.
* Other tools (gcc, gdb) use:
* 0 - fp
* 1 - sp
* 2 - r0
* 31 - cc
*/
if ((nr < 0) || (nr > 32))
{
sim_io_eprintf (CPU_STATE (cpu), "unknown register %i\n", nr);
abort ();
}
switch (nr)
{
case FT32_FP_REGNUM:
return &cpu->state.regs[FT32_HARD_FP];
case FT32_SP_REGNUM:
return &cpu->state.regs[FT32_HARD_SP];
case FT32_CC_REGNUM:
return &cpu->state.regs[FT32_HARD_CC];
case FT32_PC_REGNUM:
return &cpu->state.pc;
default:
return &cpu->state.regs[nr - 2];
}
}
static int
ft32_reg_store (SIM_CPU *cpu,
int rn,
unsigned char *memory,
int length)
{
if (0 <= rn && rn <= 32)
{
if (length == 4)
*ft32_lookup_register (cpu, rn) = ft32_extract_unsigned_integer (memory, 4);
return 4;
}
else
return 0;
}
static int
ft32_reg_fetch (SIM_CPU *cpu,
int rn,
unsigned char *memory,
int length)
{
if (0 <= rn && rn <= 32)
{
if (length == 4)
ft32_store_unsigned_integer (memory, 4, *ft32_lookup_register (cpu, rn));
return 4;
}
else
return 0;
}
static sim_cia
ft32_pc_get (SIM_CPU *cpu)
{
return cpu->state.pc;
}
static void
ft32_pc_set (SIM_CPU *cpu, sim_cia newpc)
{
cpu->state.pc = newpc;
}
/* Cover function of sim_state_free to free the cpu buffers as well. */
static void
free_state (SIM_DESC sd)
{
if (STATE_MODULES (sd) != NULL)
sim_module_uninstall (sd);
sim_cpu_free_all (sd);
sim_state_free (sd);
}
SIM_DESC
sim_open (SIM_OPEN_KIND kind,
host_callback *cb,
struct bfd *abfd,
char * const *argv)
{
char c;
size_t i;
SIM_DESC sd = sim_state_alloc (kind, cb);
/* Set default options before parsing user options. */
current_alignment = STRICT_ALIGNMENT;
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)
{
free_state (sd);
return 0;
}
if (sim_pre_argv_init (sd, argv[0]) != SIM_RC_OK)
{
free_state (sd);
return 0;
}
/* The parser will print an error message for us, so we silently return. */
if (sim_parse_args (sd, argv) != SIM_RC_OK)
{
free_state (sd);
return 0;
}
/* Allocate external memory if none specified by user.
Use address 4 here in case the user wanted address 0 unmapped. */
if (sim_core_read_buffer (sd, NULL, read_map, &c, 4, 1) == 0)
{
sim_do_command (sd, "memory region 0x00000000,0x40000");
sim_do_command (sd, "memory region 0x800000,0x10000");
}
/* Check for/establish the reference program image. */
if (sim_analyze_program (sd,
(STATE_PROG_ARGV (sd) != NULL
? *STATE_PROG_ARGV (sd)
: NULL), abfd) != SIM_RC_OK)
{
free_state (sd);
return 0;
}
/* Configure/verify the target byte order and other runtime
configuration options. */
if (sim_config (sd) != SIM_RC_OK)
{
free_state (sd);
return 0;
}
if (sim_post_argv_init (sd) != SIM_RC_OK)
{
free_state (sd);
return 0;
}
/* CPU specific initialization. */
for (i = 0; i < MAX_NR_PROCESSORS; ++i)
{
SIM_CPU *cpu = STATE_CPU (sd, i);
CPU_REG_FETCH (cpu) = ft32_reg_fetch;
CPU_REG_STORE (cpu) = ft32_reg_store;
CPU_PC_FETCH (cpu) = ft32_pc_get;
CPU_PC_STORE (cpu) = ft32_pc_set;
}
return sd;
}
SIM_RC
sim_create_inferior (SIM_DESC sd,
struct bfd *abfd,
char * const *argv,
char * const *env)
{
uint32_t addr;
sim_cpu *cpu = STATE_CPU (sd, 0);
/* Set the PC. */
if (abfd != NULL)
addr = bfd_get_start_address (abfd);
else
addr = 0;
/* Standalone mode (i.e. `run`) will take care of the argv for us in
sim_open() -> sim_parse_args(). But in debug mode (i.e. 'target sim'
with `gdb`), we need to handle it because the user can change the
argv on the fly via gdb's 'run'. */
if (STATE_PROG_ARGV (sd) != argv)
{
freeargv (STATE_PROG_ARGV (sd));
STATE_PROG_ARGV (sd) = dupargv (argv);
}
cpu->state.regs[FT32_HARD_SP] = addr;
cpu->state.num_i = 0;
cpu->state.cycles = 0;
cpu->state.next_tick_cycle = 100000;
return SIM_RC_OK;
}
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