|
| 1 | +/* |
| 2 | + * This file is part of the MicroPython project, http://micropython.org/ |
| 3 | + * |
| 4 | + * The MIT License (MIT) |
| 5 | + * |
| 6 | + * Copyright (c) 2025 Ibrahim Abdelkader <iabdalkader@openmv.io> |
| 7 | + * |
| 8 | + * Permission is hereby granted, free of charge, to any person obtaining a copy |
| 9 | + * of this software and associated documentation files (the "Software"), to deal |
| 10 | + * in the Software without restriction, including without limitation the rights |
| 11 | + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| 12 | + * copies of the Software, and to permit persons to whom the Software is |
| 13 | + * furnished to do so, subject to the following conditions: |
| 14 | + * |
| 15 | + * The above copyright notice and this permission notice shall be included in |
| 16 | + * all copies or substantial portions of the Software. |
| 17 | + * |
| 18 | + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 19 | + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 20 | + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| 21 | + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| 22 | + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| 23 | + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
| 24 | + * THE SOFTWARE. |
| 25 | + */ |
| 26 | + |
| 27 | +#include<stdint.h> |
| 28 | + |
| 29 | +// RISC-V timebase frequency for QEMU |
| 30 | +#ifndefTIMEBASE_FREQ_HZ |
| 31 | +#defineTIMEBASE_FREQ_HZ 10000000u |
| 32 | +#endif |
| 33 | + |
| 34 | +staticuint64_tticks_get_ticks(void) { |
| 35 | +#if__riscv_xlen<64 |
| 36 | +uint32_tticks_lo=0; |
| 37 | +uint32_tticks_hi=0; |
| 38 | +uint32_trollover=0; |
| 39 | +do { |
| 40 | + __asmvolatile ( |
| 41 | +"rdtimeh %0 \n" |
| 42 | +"rdtime %1 \n" |
| 43 | +"rdtimeh %2 \n" |
| 44 | + :"=r" (ticks_hi),"=r" (ticks_lo),"=r" (rollover) |
| 45 | + : |
| 46 | + : |
| 47 | + ); |
| 48 | + }while (ticks_hi!=rollover); |
| 49 | +return ((uint64_t)(ticks_hi) <<32ULL) | (uint64_t)(ticks_lo); |
| 50 | +#else |
| 51 | +uint64_tticks=0; |
| 52 | + __asmvolatile ( |
| 53 | +"rdtime %0 \n" |
| 54 | + :"=r" (ticks) |
| 55 | + : |
| 56 | + : |
| 57 | + ); |
| 58 | +returnticks; |
| 59 | +#endif |
| 60 | +} |
| 61 | + |
| 62 | +uintptr_tticks_ms(void) { |
| 63 | +return (uintptr_t)(ticks_get_ticks() / (TIMEBASE_FREQ_HZ /1000)); |
| 64 | +} |
| 65 | + |
| 66 | +uintptr_tticks_us(void) { |
| 67 | +return (uintptr_t)(ticks_get_ticks() / (TIMEBASE_FREQ_HZ /1000000)); |
| 68 | +} |