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https://github.com/tillitis/tillitis-key1.git
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2e1925555d
App is embedded in firmware and is loaded into app RAM when firmware starts. App continuously calls SET_LED syscalls. Simulation: `make tb_application_fpga_irqpoc_c_example`
59 lines
1.0 KiB
C
59 lines
1.0 KiB
C
/*
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* Copyright (C) 2022, 2023 - Tillitis AB
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* SPDX-License-Identifier: GPL-2.0-only
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*/
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#include "../tk1/types.h"
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#include "../tk1/led.h"
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#include "../tk1/assert.h"
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// Proof-of-concept firmware for handling syscalls.
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// This is NOT a best-practice example of secure syscall implementation.
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#define SYSCALL_HI (1 << 31)
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#define SYSCALL_LO 0
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#define SYSCALL_HI_SET_LED (SYSCALL_HI | 10)
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#define SYSCALL_LO_SET_LED (SYSCALL_LO | 10)
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static void delay(int32_t count) {
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volatile int32_t c = count;
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while (c > 0) {
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c--;
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}
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}
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int32_t syscall_lo_handler(uint32_t syscall_nr, uint32_t arg1) {
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switch (syscall_nr) {
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case SYSCALL_LO_SET_LED:
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set_led(arg1);
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//delay(1000000);
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return 0;
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default:
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assert(1 == 2);
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}
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assert(1 == 2);
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return -1; // This should never run
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}
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int32_t syscall_hi_handler(uint32_t syscall_nr, uint32_t arg1) {
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switch (syscall_nr) {
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case SYSCALL_HI_SET_LED:
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set_led(arg1);
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//delay(500000);
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return 0;
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default:
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assert(1 == 2);
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}
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assert(1 == 2);
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return -1; // This should never run
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}
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int main(void)
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{
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while (1) {
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}
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}
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