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#include "neorv32_rte.h"
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#include "neorv32_rte.h"
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/**********************************************************************//**
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/**********************************************************************//**
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* The >private< trap vector look-up table of the NEORV32 RTE.
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* The >private< trap vector look-up table of the NEORV32 RTE.
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**************************************************************************/
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**************************************************************************/
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static uint32_t __neorv32_rte_vector_lut[21] __attribute__((unused)); // trap handler vector table
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static uint32_t __neorv32_rte_vector_lut[29] __attribute__((unused)); // trap handler vector table
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// private functions
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// private functions
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static void __attribute__((__interrupt__)) __neorv32_rte_core(void) __attribute__((aligned(16))) __attribute__((unused));
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static void __attribute__((__interrupt__)) __neorv32_rte_core(void) __attribute__((aligned(16))) __attribute__((unused));
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static void __neorv32_rte_debug_exc_handler(void) __attribute__((unused));
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static void __neorv32_rte_debug_exc_handler(void) __attribute__((unused));
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static void __neorv32_rte_print_true_false(int state) __attribute__((unused));
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static void __neorv32_rte_print_true_false(int state) __attribute__((unused));
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static void __neorv32_rte_print_hex_word(uint32_t num);
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static void __neorv32_rte_print_hex_word(uint32_t num);
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static int __neorv32_rte_check_exc_id(uint32_t id);
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/**********************************************************************//**
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/**********************************************************************//**
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* Setup NEORV32 runtime environment.
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* Setup NEORV32 runtime environment.
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*
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*
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* @return 0 if success, 1 if error (invalid id or targeted exception not supported).
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* @return 0 if success, 1 if error (invalid id or targeted exception not supported).
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**************************************************************************/
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**************************************************************************/
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int neorv32_rte_exception_install(uint8_t id, void (*handler)(void)) {
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int neorv32_rte_exception_install(uint8_t id, void (*handler)(void)) {
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// id valid?
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// id valid?
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if (__neorv32_rte_check_exc_id(id) == 0) {
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if ((id >= RTE_TRAP_I_MISALIGNED) && (id <= CSR_MIE_FIRQ15E)) {
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__neorv32_rte_vector_lut[id] = (uint32_t)handler; // install handler
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__neorv32_rte_vector_lut[id] = (uint32_t)handler; // install handler
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return 0;
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return 0;
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}
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}
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return 1;
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return 1;
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}
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}
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* @return 0 if success, 1 if error (invalid id or targeted exception not supported).
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* @return 0 if success, 1 if error (invalid id or targeted exception not supported).
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**************************************************************************/
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**************************************************************************/
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int neorv32_rte_exception_uninstall(uint8_t id) {
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int neorv32_rte_exception_uninstall(uint8_t id) {
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// id valid?
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// id valid?
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if (__neorv32_rte_check_exc_id(id) == 0) {
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if ((id >= RTE_TRAP_I_MISALIGNED) && (id <= CSR_MIE_FIRQ15E)) {
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__neorv32_rte_vector_lut[id] = (uint32_t)(&__neorv32_rte_debug_exc_handler); // use dummy handler in case the exception is accidently triggered
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__neorv32_rte_vector_lut[id] = (uint32_t)(&__neorv32_rte_debug_exc_handler); // use dummy handler in case the exception is accidently triggered
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return 0;
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return 0;
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}
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}
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return 1;
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return 1;
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}
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}
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case TRAP_CODE_FIRQ_3: rte_handler = __neorv32_rte_vector_lut[RTE_TRAP_FIRQ_3]; break;
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case TRAP_CODE_FIRQ_3: rte_handler = __neorv32_rte_vector_lut[RTE_TRAP_FIRQ_3]; break;
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case TRAP_CODE_FIRQ_4: rte_handler = __neorv32_rte_vector_lut[RTE_TRAP_FIRQ_4]; break;
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case TRAP_CODE_FIRQ_4: rte_handler = __neorv32_rte_vector_lut[RTE_TRAP_FIRQ_4]; break;
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case TRAP_CODE_FIRQ_5: rte_handler = __neorv32_rte_vector_lut[RTE_TRAP_FIRQ_5]; break;
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case TRAP_CODE_FIRQ_5: rte_handler = __neorv32_rte_vector_lut[RTE_TRAP_FIRQ_5]; break;
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case TRAP_CODE_FIRQ_6: rte_handler = __neorv32_rte_vector_lut[RTE_TRAP_FIRQ_6]; break;
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case TRAP_CODE_FIRQ_6: rte_handler = __neorv32_rte_vector_lut[RTE_TRAP_FIRQ_6]; break;
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case TRAP_CODE_FIRQ_7: rte_handler = __neorv32_rte_vector_lut[RTE_TRAP_FIRQ_7]; break;
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case TRAP_CODE_FIRQ_7: rte_handler = __neorv32_rte_vector_lut[RTE_TRAP_FIRQ_7]; break;
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case TRAP_CODE_FIRQ_8: rte_handler = __neorv32_rte_vector_lut[RTE_TRAP_FIRQ_8]; break;
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case TRAP_CODE_FIRQ_9: rte_handler = __neorv32_rte_vector_lut[RTE_TRAP_FIRQ_9]; break;
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case TRAP_CODE_FIRQ_10: rte_handler = __neorv32_rte_vector_lut[RTE_TRAP_FIRQ_10]; break;
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case TRAP_CODE_FIRQ_11: rte_handler = __neorv32_rte_vector_lut[RTE_TRAP_FIRQ_11]; break;
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case TRAP_CODE_FIRQ_12: rte_handler = __neorv32_rte_vector_lut[RTE_TRAP_FIRQ_12]; break;
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case TRAP_CODE_FIRQ_13: rte_handler = __neorv32_rte_vector_lut[RTE_TRAP_FIRQ_13]; break;
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case TRAP_CODE_FIRQ_14: rte_handler = __neorv32_rte_vector_lut[RTE_TRAP_FIRQ_14]; break;
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case TRAP_CODE_FIRQ_15: rte_handler = __neorv32_rte_vector_lut[RTE_TRAP_FIRQ_15]; break;
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default: break;
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default: break;
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}
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}
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// execute handler
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// execute handler
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void (*handler_pnt)(void);
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void (*handler_pnt)(void);
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* NEORV32 runtime environment: Debug exception handler, printing various exception/interrupt information via UART.
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* NEORV32 runtime environment: Debug exception handler, printing various exception/interrupt information via UART.
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* @note This function is used by neorv32_rte_exception_uninstall(void) only.
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* @note This function is used by neorv32_rte_exception_uninstall(void) only.
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**************************************************************************/
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**************************************************************************/
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static void __neorv32_rte_debug_exc_handler(void) {
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static void __neorv32_rte_debug_exc_handler(void) {
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char tmp;
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// intro
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// intro
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neorv32_uart_print("<RTE> ");
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neorv32_uart_print("<RTE> ");
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// cause
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// cause
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register uint32_t trap_cause = neorv32_cpu_csr_read(CSR_MCAUSE);
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register uint32_t trap_cause = neorv32_cpu_csr_read(CSR_MCAUSE);
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tmp = (char)(trap_cause & 0xf);
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if (tmp >= 10) {
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tmp = 'a' + (tmp - 10);
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}
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else {
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tmp = '0' + tmp;
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}
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switch (trap_cause) {
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switch (trap_cause) {
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case TRAP_CODE_I_MISALIGNED: neorv32_uart_print("Instruction address misaligned"); break;
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case TRAP_CODE_I_MISALIGNED: neorv32_uart_print("Instruction address misaligned"); break;
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case TRAP_CODE_I_ACCESS: neorv32_uart_print("Instruction access fault"); break;
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case TRAP_CODE_I_ACCESS: neorv32_uart_print("Instruction access fault"); break;
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case TRAP_CODE_I_ILLEGAL: neorv32_uart_print("Illegal instruction"); break;
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case TRAP_CODE_I_ILLEGAL: neorv32_uart_print("Illegal instruction"); break;
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case TRAP_CODE_BREAKPOINT: neorv32_uart_print("Breakpoint"); break;
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case TRAP_CODE_BREAKPOINT: neorv32_uart_print("Breakpoint"); break;
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case TRAP_CODE_FIRQ_2:
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case TRAP_CODE_FIRQ_2:
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case TRAP_CODE_FIRQ_3:
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case TRAP_CODE_FIRQ_3:
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case TRAP_CODE_FIRQ_4:
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case TRAP_CODE_FIRQ_4:
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case TRAP_CODE_FIRQ_5:
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case TRAP_CODE_FIRQ_5:
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case TRAP_CODE_FIRQ_6:
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case TRAP_CODE_FIRQ_6:
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case TRAP_CODE_FIRQ_7: neorv32_uart_print("Fast interrupt "); neorv32_uart_putc((char)('0' + (trap_cause & 0x7))); break;
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case TRAP_CODE_FIRQ_7:
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case TRAP_CODE_FIRQ_8:
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case TRAP_CODE_FIRQ_9:
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case TRAP_CODE_FIRQ_10:
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case TRAP_CODE_FIRQ_11:
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case TRAP_CODE_FIRQ_12:
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case TRAP_CODE_FIRQ_13:
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case TRAP_CODE_FIRQ_14:
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case TRAP_CODE_FIRQ_15: neorv32_uart_print("Fast interrupt "); neorv32_uart_putc(tmp); break;
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default: neorv32_uart_print("Unknown trap cause: "); __neorv32_rte_print_hex_word(trap_cause); break;
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default: neorv32_uart_print("Unknown trap cause: "); __neorv32_rte_print_hex_word(trap_cause); break;
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}
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}
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// instruction address
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// instruction address
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neorv32_uart_print(" @ PC=");
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neorv32_uart_print(" @ PC=");
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}
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}
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}
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}
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/**********************************************************************//**
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/**********************************************************************//**
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* NEORV32 runtime environment: Private function to check exception id
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* as 8-digit hexadecimal value (with "0x" suffix).
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*
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* @param[in] id Exception id (#NEORV32_RTE_TRAP_enum).
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* @return Return 0 if id is valid
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**************************************************************************/
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static int __neorv32_rte_check_exc_id(uint32_t id) {
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// id valid?
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if ((id == RTE_TRAP_I_MISALIGNED) || (id == RTE_TRAP_I_ACCESS) || (id == RTE_TRAP_I_ILLEGAL) ||
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(id == RTE_TRAP_BREAKPOINT) || (id == RTE_TRAP_L_MISALIGNED) || (id == RTE_TRAP_L_ACCESS) ||
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(id == RTE_TRAP_S_MISALIGNED) || (id == RTE_TRAP_S_ACCESS) || (id == RTE_TRAP_MENV_CALL) || (id == RTE_TRAP_UENV_CALL) ||
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(id == RTE_TRAP_MSI) || (id == RTE_TRAP_MTI) || (id == RTE_TRAP_MEI) ||
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(id == RTE_TRAP_FIRQ_0) || (id == RTE_TRAP_FIRQ_1) || (id == RTE_TRAP_FIRQ_2) || (id == RTE_TRAP_FIRQ_3) ||
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(id == RTE_TRAP_FIRQ_4) || (id == RTE_TRAP_FIRQ_5) || (id == RTE_TRAP_FIRQ_6) || (id == RTE_TRAP_FIRQ_7)) {
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return 0;
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}
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else {
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return 1;
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}
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}
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/**********************************************************************//**
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* NEORV32 runtime environment: Print the processor version in human-readable format.
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* NEORV32 runtime environment: Print the processor version in human-readable format.
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**************************************************************************/
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**************************************************************************/
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void neorv32_rte_print_hw_version(void) {
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void neorv32_rte_print_hw_version(void) {
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uint32_t i;
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uint32_t i;
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