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lib: sbi: Add system suspend skeleton

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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>
This commit is contained in:
Andrew Jones
2023-02-27 11:31:02 +01:00
committed by Anup Patel
parent 8a40306371
commit 73623a0aca
7 changed files with 119 additions and 0 deletions
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8
include/sbi/sbi_ecall_interface.h
View File

@@ -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

26
include/sbi/sbi_system.h
View File

@@ -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