diff options
| author | Andrew Jones <ajones@ventanamicro.com> | 2023-02-27 13:31:02 +0300 |
|---|---|---|
| committer | Anup Patel <anup@brainfault.org> | 2023-02-27 17:13:52 +0300 |
| commit | 73623a0acac7f62646757cdd5a03b325eba3e0c9 (patch) | |
| tree | 3665667dbfecdfaf68789e8aaa8508b9e3d83255 /include | |
| parent | 8a40306371b7e5dbe20da946edd0ddd9693bfa85 (diff) | |
| download | opensbi-73623a0acac7f62646757cdd5a03b325eba3e0c9.tar.xz | |
lib: sbi: Add system suspend skeleton
Add the SUSP extension probe and ecall support, but for now the
system suspend function is just a stub.
Signed-off-by: Andrew Jones <ajones@ventanamicro.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/sbi/sbi_ecall_interface.h | 8 | ||||
| -rw-r--r-- | include/sbi/sbi_system.h | 26 |
2 files changed, 34 insertions, 0 deletions
diff --git a/include/sbi/sbi_ecall_interface.h b/include/sbi/sbi_ecall_interface.h index 9d6f474..4c378c3 100644 --- a/include/sbi/sbi_ecall_interface.h +++ b/include/sbi/sbi_ecall_interface.h @@ -30,6 +30,7 @@ #define SBI_EXT_SRST 0x53525354 #define SBI_EXT_PMU 0x504D55 #define SBI_EXT_DBCN 0x4442434E +#define SBI_EXT_SUSP 0x53555350 /* SBI function IDs for BASE extension*/ #define SBI_EXT_BASE_GET_SPEC_VERSION 0x0 @@ -236,6 +237,13 @@ enum sbi_pmu_ctr_type { #define SBI_EXT_DBCN_CONSOLE_READ 0x1 #define SBI_EXT_DBCN_CONSOLE_WRITE_BYTE 0x2 +/* SBI function IDs for SUSP extension */ +#define SBI_EXT_SUSP_SUSPEND 0x0 + +#define SBI_SUSP_SLEEP_TYPE_SUSPEND 0x0 +#define SBI_SUSP_SLEEP_TYPE_LAST SBI_SUSP_SLEEP_TYPE_SUSPEND +#define SBI_SUSP_PLATFORM_SLEEP_START 0x80000000 + /* SBI base specification related macros */ #define SBI_SPEC_VERSION_MAJOR_OFFSET 24 #define SBI_SPEC_VERSION_MAJOR_MASK 0x7f diff --git a/include/sbi/sbi_system.h b/include/sbi/sbi_system.h index 84c2813..11d3d6f 100644 --- a/include/sbi/sbi_system.h +++ b/include/sbi/sbi_system.h @@ -43,4 +43,30 @@ bool sbi_system_reset_supported(u32 reset_type, u32 reset_reason); void __noreturn sbi_system_reset(u32 reset_type, u32 reset_reason); +/** System suspend device */ +struct sbi_system_suspend_device { + /** Name of the system suspend device */ + char name[32]; + + /* Check whether sleep type is supported by the device */ + int (*system_suspend_check)(u32 sleep_type); + + /** + * Suspend the system + * + * @sleep_type: The sleep type identifier passed to the SBI call. + * @mmode_resume_addr: + * This is the same as sbi_scratch.warmboot_addr. Some platforms + * may not be able to return from system_suspend(), so they will + * jump directly to this address instead. Platforms which can + * return from system_suspend() may ignore this parameter. + */ + int (*system_suspend)(u32 sleep_type, unsigned long mmode_resume_addr); +}; + +const struct sbi_system_suspend_device *sbi_system_suspend_get_device(void); +void sbi_system_suspend_set_device(struct sbi_system_suspend_device *dev); +bool sbi_system_suspend_supported(u32 sleep_type); +int sbi_system_suspend(u32 sleep_type, ulong resume_addr, ulong opaque); + #endif |