static void reset_registers(void) {
uint32_t vectortable = read_word(VECTOR_TABLE_OFFSET);
// R[0..12] = bits(32) UNKNOWN {nop}
SW(&sp_main,read_word(vectortable) & 0xfffffffc);
// sp_process = ((bits(30) UNKNOWN):'00')
SW(&sp_process, SR(&sp_process) & ~0x3);
CORE_reg_write(LR_REG, 0xFFFFFFFF);
uint32_t tmp = read_word(vectortable+4);
bool tbit = tmp & 0x1;
CORE_reg_write(PC_REG, tmp & 0xfffffffe);
if (! (tmp & 0x1) ) {
WARN("Reset vector %08x at %08x invalid\n", tmp, vectortable+4);
CORE_ERR_unpredictable("Thumb bit must be set for M-series\n");
}
// ASPR = bits(32) UNKNOWN {nop}
union ipsr_t ipsr = CORE_ipsr_read();
ipsr.bits.exception = 0;
CORE_ipsr_write(ipsr);
union epsr_t epsr = CORE_epsr_read();
epsr.bits.T = tbit;
epsr.bits.ICI_IT_top = 0;
epsr.bits.ICI_IT_bot = 0;
CORE_epsr_write(epsr);
}
// arm-thumb
static void push_t1(uint16_t inst) {
uint8_t register_list = inst & 0xff;
bool M = (inst >> 8) & 0x1;
uint16_t registers = register_list | (M << 14);
if (hamming(registers) < 1)
CORE_ERR_unpredictable("push_t1 case\n");
OP_DECOMPILE("PUSH<c> <registers>", registers);
return push(registers);
}
static void ldm_t2(uint32_t inst) {
uint16_t reg_list = inst & 0x1fff;
bool M = !!(inst & 0x4000);
bool P = !!(inst & 0x8000);
uint8_t rn = (inst & 0xf0000) >> 16;
bool W = !!(inst & 0x200000);
if ((W == 1) && (rn == 0xd))
CORE_ERR_unpredictable("ldm_t2 --> pop\n");
uint16_t registers = (P << 15) | (M << 14) | reg_list;
bool wback = (W == 1);
if ((rn == 15) || (hamming(registers) < 2) || ((P == 1) && (M == 1)))
CORE_ERR_unpredictable("ldm_t2, long ||'s\n");
if ((registers & 0x8000) && in_ITblock() && !last_in_ITblock())
CORE_ERR_unpredictable("ldm_t2, itstate stuff\n");
if (wback && (registers & (1 << (rn))))
CORE_ERR_unpredictable("ldm_t2, writeback mismatch?\n");
return ldm(rn, registers, wback);
}
static void pmu_reset_wr(uint32_t addr, uint32_t val,
bool debugger __attribute__ ((unused)) ) {
assert((addr & 0xfffffff0) & 0xA3000000);
switch (val) {
case 0x0:
CORE_ERR_not_implemented("PMU DIV5 mode override");
case 0x1:
CORE_ERR_not_implemented("PMU power-on-reset");
case 0x2:
CORE_ERR_not_implemented("Ctrl CPU layer sleep");
default:
WARN("Write %08x to %08x\n", val, addr);
CORE_ERR_unpredictable("Bad CTRL PMU Special");
}
}
static bool cpu_conf_regs_rd(uint32_t addr, uint32_t *val,
bool debugger __attribute__ ((unused)) ) {
assert((addr & 0xfffff000) == 0xA0001000);
switch (addr) {
case CHIP_ID_REG_RD:
*val = SR(&m3_prc_reg_chip_id) & MASK(CHIP_ID_REG_NBITS);
return true;
case GOC_CTRL_REG_RD:
*val = SR(&m3_prc_reg_goc_ctrl) & MASK(GOC_CTRL_REG_NBITS);
return true;
case PMU_CTRL_REG_RD:
*val = SR(&m3_prc_reg_pmu_ctrl) & MASK(PMU_CTRL_REG_NBITS);
return true;
case WUP_CTRL_REG_RD:
*val = SR(&m3_prc_reg_wup_ctrl) & MASK(WUP_CTRL_REG_NBITS);
return true;
case TSTAMP_REG_RD:
*val = SR(&m3_prc_reg_tstamp) & MASK(TSTAMP_REG_NBITS);
return true;
case MSG_REG0_RD:
*val = SR(&m3_prc_reg_msg0);
return true;
case MSG_REG1_RD:
*val = SR(&m3_prc_reg_msg1);
return true;
case MSG_REG2_RD:
*val = SR(&m3_prc_reg_msg2);
return true;
case MSG_REG3_RD:
*val = SR(&m3_prc_reg_msg3);
return true;
case INT_MSG_REG0_RD:
*val = SR(&m3_prc_reg_imsg0);
return true;
case INT_MSG_REG1_RD:
*val = SR(&m3_prc_reg_imsg1);
return true;
case INT_MSG_REG2_RD:
*val = SR(&m3_prc_reg_imsg2);
return true;
case INT_MSG_REG3_RD:
*val = SR(&m3_prc_reg_imsg3);
return true;
default:
CORE_ERR_unpredictable("Bad CPU Config Reg Read");
}
}
static void reset_registers(void) {
DBG2("begin\n");
uint32_t vectortable = read_word(VECTOR_TABLE_OFFSET);
// R[0..12] = bits(32) UNKNOWN {nop}
SW(&sp_main,read_word(vectortable) & 0xfffffffc);
// sp_process = ((bits(30) UNKNOWN):'00')
SW(&sp_process, SR(&sp_process) & ~0x3);
CORE_reg_write(LR_REG, 0xFFFFFFFF);
uint32_t tmp = read_word(vectortable+4);
bool tbit = tmp & 0x1;
CORE_reg_write(PC_REG, tmp & 0xfffffffe);
if (!tbit) {
WARN("Reset vector %08x at %08x invalid\n", tmp, vectortable+4);
CORE_ERR_unpredictable("Thumb bit must be set for M-series\n");
}
CORE_CurrentMode_write(Mode_Thread);
// ASPR = bits(32) UNKNOWN {nop}
union ipsr_t ipsr_temp = CORE_ipsr_read();
ipsr_temp.bits.exception = 0;
CORE_ipsr_write(ipsr_temp);
union epsr_t epsr_temp = CORE_epsr_read();
epsr_temp.bits.T = tbit;
epsr_temp.bits.ICI_IT_top = 0;
epsr_temp.bits.ICI_IT_bot = 0;
CORE_epsr_write(epsr_temp);
///
// B1.4.3: The special-purpose mask registers
SW(&physical_primask, 0);
SW(&physical_faultmask, 0);
SW(&physical_basepri, 0);
SW(&physical_control.storage, 0);
DBG2("end\n");
}
static void mbus_mmio_wr(uint32_t addr, uint32_t val,
bool debugger __attribute__ ((unused)) ) {
switch (addr) {
case MBUS_MMIO_ADDR:
SW(&mbus_mmio_addr, val);
break;
case MBUS_MMIO_DATA:
SW(&mbus_mmio_data, val);
INFO("MBus message: addr %08x, data %08x\n",
SR(&mbus_mmio_addr),
SR(&mbus_mmio_data)
);
break;
default:
WARN("Unknown address, %08x\n", addr);
CORE_ERR_unpredictable("Bad MBus MMIO address");
}
fflush(stdout);
}
static void cpu_conf_regs_wr(uint32_t addr, uint32_t val,
bool debugger __attribute__ ((unused)) ) {
switch (addr) {
case CHIP_ID_REG_WR:
SW(&m3_prc_reg_chip_id, val & MASK(CHIP_ID_REG_NBITS));
break;
case GOC_CTRL_REG_WR:
SW(&m3_prc_reg_goc_ctrl, val & MASK(GOC_CTRL_REG_NBITS));
break;
case PMU_CTRL_REG_WR:
SW(&m3_prc_reg_pmu_ctrl, val & MASK(PMU_CTRL_REG_NBITS));
break;
case WUP_CTRL_REG_WR:
SW(&m3_prc_reg_wup_ctrl, val & MASK(WUP_CTRL_REG_NBITS));
break;
case TSTAMP_REG_WR:
SW(&m3_prc_reg_tstamp, val & MASK(TSTAMP_REG_NBITS));
break;
default:
CORE_ERR_unpredictable("Bad CPU Config Reg Write");
}
}