diff options
| author | Anup Patel <anup.patel@wdc.com> | 2021-02-05 17:47:48 +0530 |
|---|---|---|
| committer | Anup Patel <anup@brainfault.org> | 2021-03-03 10:19:24 +0530 |
| commit | 807d71c4ff11b8dd9a6366819314db704e0f6aca (patch) | |
| tree | fb729cd791d13c3cf43b58cde9a9a611a9c1572a /include | |
| parent | 4b05df6700adbc71cfa5f681bf9263447c9140c4 (diff) | |
include: sbi: Add hart_suspend() platform callback
We add hart_suspend() callback in platform operations which will
be used by HSM implementation to enter retentive or non-retentive
suspend state.
Signed-off-by: Anup Patel <anup.patel@wdc.com>
Reviewed-by: Atish Patra <atish.patra@wdc.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/sbi/sbi_platform.h | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/include/sbi/sbi_platform.h b/include/sbi/sbi_platform.h index cc7e3ff..dadbc1e 100644 --- a/include/sbi/sbi_platform.h +++ b/include/sbi/sbi_platform.h @@ -139,6 +139,11 @@ struct sbi_platform_operations { * return if success. */ int (*hart_stop)(void); + /** + * Put the current hart in platform specific suspend (or low-power) + * state. + */ + int (*hart_suspend)(u32 suspend_type, ulong raddr); /* Check whether reset type and reason supported by the platform */ int (*system_reset_check)(u32 reset_type, u32 reset_reason); @@ -371,6 +376,31 @@ static inline int sbi_platform_hart_stop(const struct sbi_platform *plat) } /** + * Put the current hart in platform specific suspend (or low-power) state. + * + * For successful retentive suspend, the call will return 0 when the hart + * resumes normal execution. + * + * For successful non-retentive suspend, the hart will resume from specified + * resume address + * + * @param plat pointer to struct sbi_platform + * @param suspend_type the type of suspend + * @param raddr physical address where the hart can resume in M-mode after + * non-retantive suspend + * + * @return 0 if successful and negative error code on failure + */ +static inline int sbi_platform_hart_suspend(const struct sbi_platform *plat, + u32 suspend_type, ulong raddr) +{ + if (plat && sbi_platform_ops(plat)->hart_suspend) + return sbi_platform_ops(plat)->hart_suspend(suspend_type, + raddr); + return SBI_ENOTSUPP; +} + +/** * Early initialization for current HART * * @param plat pointer to struct sbi_platform |