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Diffstat (limited to 'ports/risc-v64/gnu/example_build/erbium/hwtimer.h')
| -rw-r--r-- | ports/risc-v64/gnu/example_build/erbium/hwtimer.h | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/ports/risc-v64/gnu/example_build/erbium/hwtimer.h b/ports/risc-v64/gnu/example_build/erbium/hwtimer.h new file mode 100644 index 00000000..3b9bf4e3 --- /dev/null +++ b/ports/risc-v64/gnu/example_build/erbium/hwtimer.h @@ -0,0 +1,41 @@ +/*************************************************************************** + * Copyright (c) 2026 Eclipse ThreadX contributors + * + * This program and the accompanying materials are made available under the + * terms of the MIT License which is available at + * https://opensource.org/licenses/MIT. + * + * AI Disclosure: This file was largely AI-generated by Claude Code (Opus 5.5). + * The AI-generated portions may be considered public domain (CC0-1.0) + * and not subject to the project's licence. The human contributor has + * reviewed and verified that the code is correct. + * + * SPDX-License-Identifier: MIT and CC0-1.0 + **************************************************************************/ + +#ifndef RISCV_HWTIMER_H +#define RISCV_HWTIMER_H + +#include <stdint.h> + +/* Erbium machine timer. mtime and a single mtimecmp live in the CPU + register block; mtime_local_target selects which harts see the timer + interrupt and resets to all harts. + + The mtime rate depends on the reference clock and time_config, which the + boot firmware programs. The default is the 2 MHz timebase used by the + Zephyr and NuttX Erbium ports; define ERBIUM_MTIME_FREQ_HZ when the + firmware selects another rate. */ +#define ERBIUM_MTIME 0x80F40200UL +#define ERBIUM_MTIMECMP 0x80F40208UL + +#ifndef ERBIUM_MTIME_FREQ_HZ +#define ERBIUM_MTIME_FREQ_HZ 2000000UL +#endif + +#define TICKNUM_PER_TIMER (ERBIUM_MTIME_FREQ_HZ / TX_TIMER_TICKS_PER_SECOND) + +int hwtimer_init(void); +int hwtimer_handler(void); + +#endif /* RISCV_HWTIMER_H */ |