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);
}
static void print_reg_state_internal(void) {
int i;
union apsr_t apsr = CORE_apsr_read();
union epsr_t epsr = CORE_epsr_read();
printf("[Cycle %d]\t\t", cycle);
printf("\t T: %d", epsr.bits.T);
printf("\t N: %d Z: %d C: %d V: %d ",
apsr.bits.N, apsr.bits.Z, apsr.bits.C, apsr.bits.V);
printf("| ITSTATE: %02x ", read_itstate());
printf("\n");
for (i=0; i<12; ) {
printf("\tr%02d: %8x\tr%02d: %8x\tr%02d: %8x\tr%02d: %8x\n",
i, CORE_reg_read(i),
i+1, CORE_reg_read(i+1),
i+2, CORE_reg_read(i+2),
i+3, CORE_reg_read(i+3)
);
i+=4;
}
printf("\tr12: %8x\t SP: %8x\t LR: %8x\t PC: %8x\n",
CORE_reg_read(12),
CORE_reg_read(SP_REG),
CORE_reg_read(LR_REG),
CORE_reg_read(PC_REG)
);
}
EXPORT uint32_t CORE_xPSR_read(void) {
uint32_t xPSR = 0;
xPSR |= CORE_ipsr_read().storage & xPSR_ipsr_mask;
xPSR |= CORE_epsr_read().storage & xPSR_epsr_mask;
if (HaveDSPExt())
xPSR |= CORE_apsr_read().storage & xPSR_apsr_dsp_mask;
else
xPSR |= CORE_apsr_read().storage & xPSR_apsr_nodsp_mask;
return xPSR;
}
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");
}
EXPORT void CORE_xPSR_write(uint32_t xPSR) {
union ipsr_t i = CORE_ipsr_read();
union epsr_t e = CORE_epsr_read();
union apsr_t a = CORE_apsr_read();
i.storage &= ~xPSR_ipsr_mask;
i.storage |= xPSR & xPSR_ipsr_mask;
CORE_ipsr_write(i);
e.storage &= ~xPSR_epsr_mask;
e.storage |= xPSR & xPSR_epsr_mask;
CORE_epsr_write(e);
uint32_t apsr_mask;
if (HaveDSPExt())
apsr_mask = xPSR_apsr_dsp_mask;
else
apsr_mask = xPSR_apsr_nodsp_mask;
a.storage &= ~apsr_mask;
a.storage |= xPSR & apsr_mask;
CORE_apsr_write(a);
}