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/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Copyright (C) 2012 Regents of the University of California
*/
#ifndef _ASM_RISCV_TIMEX_H
#define _ASM_RISCV_TIMEX_H
#include <asm/csr.h>
#include <asm/mmio.h>
typedef unsigned long cycles_t;
extern u64 __iomem *riscv_time_val;
extern u64 __iomem *riscv_time_cmp;
#ifdef CONFIG_64BIT
#define mmio_get_cycles() readq_relaxed(riscv_time_val)
#else
#define mmio_get_cycles() readl_relaxed(riscv_time_val)
#define mmio_get_cycles_hi() readl_relaxed(((u32 *)riscv_time_val) + 1)
#endif
static inline cycles_t get_cycles(void)
{
if (IS_ENABLED(CONFIG_RISCV_SBI))
return csr_read(CSR_TIME);
return mmio_get_cycles();
}
#define get_cycles get_cycles
#ifdef CONFIG_64BIT
static inline u64 get_cycles64(void)
{
return get_cycles();
}
#else /* CONFIG_64BIT */
static inline u32 get_cycles_hi(void)
{
if (IS_ENABLED(CONFIG_RISCV_SBI))
return csr_read(CSR_TIMEH);
return mmio_get_cycles_hi();
}
static inline u64 get_cycles64(void)
{
u32 hi, lo;
do {
hi = get_cycles_hi();
lo = get_cycles();
} while (hi != get_cycles_hi());
return ((u64)hi << 32) | lo;
}
#endif /* CONFIG_64BIT */
#define ARCH_HAS_READ_CURRENT_TIMER
static inline int read_current_timer(unsigned long *timer_val)
{
*timer_val = get_cycles();
return 0;
}
#endif /* _ASM_RISCV_TIMEX_H */
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