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- /*
- * SPDX-License-Identifier: BSD-2-Clause
- *
- * Copyright (c) 2019 Western Digital Corporation or its affiliates.
- *
- * Authors:
- * Anup Patel <anup.patel@wdc.com>
- */
- #include <sbi/riscv_asm.h>
- #include <sbi/riscv_encoding.h>
- #include <sbi/sbi_platform.h>
- #include <sbi/sbi_timer.h>
- #if __riscv_xlen == 32
- u64 get_ticks(void)
- {
- u32 lo, hi, tmp;
- __asm__ __volatile__ (
- "1:\n"
- "rdtimeh %0\n"
- "rdtime %1\n"
- "rdtimeh %2\n"
- "bne %0, %2, 1b"
- : "=&r" (hi), "=&r" (lo), "=&r" (tmp));
- return ((u64)hi << 32) | lo;
- }
- #else
- u64 get_ticks(void)
- {
- unsigned long n;
- __asm__ __volatile__ (
- "rdtime %0"
- : "=r" (n));
- return n;
- }
- #endif
- u64 sbi_timer_value(struct sbi_scratch *scratch)
- {
- const struct sbi_platform *plat = sbi_platform_ptr(scratch);
- if (sbi_platform_has_timer_value(plat))
- return sbi_platform_timer_value(plat);
- else
- return get_ticks();
- }
- void sbi_timer_event_stop(struct sbi_scratch *scratch)
- {
- sbi_platform_timer_event_stop(sbi_platform_ptr(scratch));
- }
- void sbi_timer_event_start(struct sbi_scratch *scratch, u64 next_event)
- {
- sbi_platform_timer_event_start(sbi_platform_ptr(scratch),
- next_event);
- csr_clear(CSR_MIP, MIP_STIP);
- csr_set(CSR_MIE, MIP_MTIP);
- }
- void sbi_timer_process(struct sbi_scratch *scratch)
- {
- csr_clear(CSR_MIE, MIP_MTIP);
- csr_set(CSR_MIP, MIP_STIP);
- }
- int sbi_timer_init(struct sbi_scratch *scratch, bool cold_boot)
- {
- return sbi_platform_timer_init(sbi_platform_ptr(scratch),
- cold_boot);
- }
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