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/*
* SPDX-License-Identifier: BSD-2-Clause
*
* Copyright (c) 2019 Andes Technology Corporation
*
* Authors:
* Zong Li <zong@andestech.com>
* Nylon Chen <nylon7@andestech.com>
*/
#include <sbi/riscv_asm.h>
#include <sbi/riscv_io.h>
static u32 plmt_time_hart_count;
static volatile void *plmt_time_base;
static volatile u64 *plmt_time_val;
static volatile u64 *plmt_time_cmp;
u64 plmt_timer_value(void)
{
#if __riscv_xlen == 64
return readq_relaxed(plmt_time_val);
#else
u32 lo, hi;
do {
hi = readl_relaxed((void *)plmt_time_val + 0x04);
lo = readl_relaxed(plmt_time_val);
} while (hi != readl_relaxed((void *)plmt_time_val + 0x04));
return ((u64)hi << 32) | (u64)lo;
#endif
}
void plmt_timer_event_stop(void)
{
u32 target_hart = current_hartid();
if (plmt_time_hart_count <= target_hart)
return;
/* Clear PLMT Time Compare */
#if __riscv_xlen == 64
writeq_relaxed(-1ULL, &plmt_time_cmp[target_hart]);
#else
writel_relaxed(-1UL, &plmt_time_cmp[target_hart]);
writel_relaxed(-1UL, (void *)(&plmt_time_cmp[target_hart]) + 0x04);
#endif
}
void plmt_timer_event_start(u64 next_event)
{
u32 target_hart = current_hartid();
if (plmt_time_hart_count <= target_hart)
return;
/* Program PLMT Time Compare */
#if __riscv_xlen == 64
writeq_relaxed(next_event, &plmt_time_cmp[target_hart]);
#else
u32 mask = -1UL;
writel_relaxed(next_event & mask, &plmt_time_cmp[target_hart]);
writel_relaxed(next_event >> 32,
(void *)(&plmt_time_cmp[target_hart]) + 0x04);
#endif
}
int plmt_warm_timer_init(void)
{
u32 target_hart = current_hartid();
if (plmt_time_hart_count <= target_hart || !plmt_time_base)
return -1;
/* Clear PLMT Time Compare */
#if __riscv_xlen == 64
writeq_relaxed(-1ULL, &plmt_time_cmp[target_hart]);
#else
writel_relaxed(-1UL, &plmt_time_cmp[target_hart]);
writel_relaxed(-1UL, (void *)(&plmt_time_cmp[target_hart]) + 0x04);
#endif
return 0;
}
int plmt_cold_timer_init(unsigned long base, u32 hart_count)
{
plmt_time_hart_count = hart_count;
plmt_time_base = (void *)base;
plmt_time_val = (u64 *)(plmt_time_base);
plmt_time_cmp = (u64 *)(plmt_time_base + 0x8);
return 0;
}
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