kopia lustrzana https://github.com/micropython/micropython
96 wiersze
3.1 KiB
C
96 wiersze
3.1 KiB
C
/*
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* This file is part of the MicroPython project, http://micropython.org/
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2023 Alessandro Gatti
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include "uart.h"
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extern void set_interrupt_table(void);
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extern int main(int argc, char **argv);
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void _entry_point(void) {
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// Set interrupt table
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set_interrupt_table();
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// Enable UART
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uart_init();
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// Now that we have a basic system up and running we can call main
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main(0, 0);
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// Finished
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exit(0);
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}
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void exit(int status) {
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uint32_t semihosting_arguments[2] = { 0 };
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// Exit via QEMU's RISC-V semihosting support.
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__asm volatile (
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".option push \n" // Transient options
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".option norvc \n" // Do not emit compressed instructions
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".align 4 \n" // 16 bytes alignment
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"mv a1, %0 \n" // Load buffer
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"li t0, 0x20026 \n" // ADP_Stopped_ApplicationExit
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"sw t0, 0(a1) \n" // ADP_Stopped_ApplicationExit
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"sw %1, 4(a1) \n" // Exit code
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"addi a0, zero, 0x20 \n" // TARGET_SYS_EXIT_EXTENDED
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"slli zero, zero, 0x1F \n" // Entry NOP
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"ebreak \n" // Give control to the debugger
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"srai zero, zero, 7 \n" // Semihosting call
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".option pop \n" // Restore previous options set
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:
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: "r" (semihosting_arguments), "r" (status)
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: "memory"
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);
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// Should never reach here.
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for (;;) {
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}
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}
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#ifndef NDEBUG
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void __assert_func(const char *file, int line, const char *func, const char *expr) {
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(void)func;
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printf("Assertion '%s' failed, at file %s:%d\n", expr, file, line);
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exit(1);
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}
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#endif
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// The following are needed for tinytest
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#include <stdio.h>
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int setvbuf(FILE *stream, char *buf, int mode, size_t size) {
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return 0;
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}
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#if (USE_PICOLIBC)
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FILE *const stdout;
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#else
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struct _reent _port_impure_data;
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struct _reent *_impure_ptr = &_port_impure_data;
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#endif
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