diff options
| author | Atish Patra <atish.patra@wdc.com> | 2019-06-18 14:54:01 -0700 |
|---|---|---|
| committer | Anup Patel <anup.patel@wdc.com> | 2019-06-19 09:48:51 +0530 |
| commit | 749b0b093242a4c27f7c4f66121afd7852b2de48 (patch) | |
| tree | 90c46fe6e750ddf08dd57347ddd498571792353a /lib/sbi/sbi_timer.c | |
| parent | a5b37bd7d275fc65d8fd0b19bd3a08edfe4e6096 (diff) | |
lib: Move sbi core library to lib/sbi
Signed-off-by: Atish Patra <atish.patra@wdc.com>
Acked-by: Anup Patel <anup.patel@wdc.com>
Diffstat (limited to 'lib/sbi/sbi_timer.c')
| -rw-r--r-- | lib/sbi/sbi_timer.c | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/lib/sbi/sbi_timer.c b/lib/sbi/sbi_timer.c new file mode 100644 index 0000000..c58441d --- /dev/null +++ b/lib/sbi/sbi_timer.c @@ -0,0 +1,68 @@ +/* + * 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); +} |