From 94ac2ab3fff96814d7460a27a0e9d004abbd4128 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Wed, 19 Jun 2024 23:00:37 +0200 Subject: Merging upstream version 6.9.2. Signed-off-by: Daniel Baumann --- .../selftests/kvm/include/riscv/arch_timer.h | 71 ++++++++++++++++++++++ 1 file changed, 71 insertions(+) create mode 100644 tools/testing/selftests/kvm/include/riscv/arch_timer.h (limited to 'tools/testing/selftests/kvm/include/riscv/arch_timer.h') diff --git a/tools/testing/selftests/kvm/include/riscv/arch_timer.h b/tools/testing/selftests/kvm/include/riscv/arch_timer.h new file mode 100644 index 000000000..225d81dad --- /dev/null +++ b/tools/testing/selftests/kvm/include/riscv/arch_timer.h @@ -0,0 +1,71 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * RISC-V Arch Timer(sstc) specific interface + * + * Copyright (c) 2024 Intel Corporation + */ + +#ifndef SELFTEST_KVM_ARCH_TIMER_H +#define SELFTEST_KVM_ARCH_TIMER_H + +#include +#include + +static unsigned long timer_freq; + +#define msec_to_cycles(msec) \ + ((timer_freq) * (uint64_t)(msec) / 1000) + +#define usec_to_cycles(usec) \ + ((timer_freq) * (uint64_t)(usec) / 1000000) + +#define cycles_to_usec(cycles) \ + ((uint64_t)(cycles) * 1000000 / (timer_freq)) + +static inline uint64_t timer_get_cycles(void) +{ + return csr_read(CSR_TIME); +} + +static inline void timer_set_cmp(uint64_t cval) +{ + csr_write(CSR_STIMECMP, cval); +} + +static inline uint64_t timer_get_cmp(void) +{ + return csr_read(CSR_STIMECMP); +} + +static inline void timer_irq_enable(void) +{ + csr_set(CSR_SIE, IE_TIE); +} + +static inline void timer_irq_disable(void) +{ + csr_clear(CSR_SIE, IE_TIE); +} + +static inline void timer_set_next_cmp_ms(uint32_t msec) +{ + uint64_t now_ct = timer_get_cycles(); + uint64_t next_ct = now_ct + msec_to_cycles(msec); + + timer_set_cmp(next_ct); +} + +static inline void __delay(uint64_t cycles) +{ + uint64_t start = timer_get_cycles(); + + while ((timer_get_cycles() - start) < cycles) + cpu_relax(); +} + +static inline void udelay(unsigned long usec) +{ + __delay(usec_to_cycles(usec)); +} + +#endif /* SELFTEST_KVM_ARCH_TIMER_H */ -- cgit v1.2.3