forked from Mirrors/opensbi
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>
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@@ -30,6 +30,7 @@
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#define SBI_EXT_SRST 0x53525354
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#define SBI_EXT_PMU 0x504D55
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#define SBI_EXT_DBCN 0x4442434E
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#define SBI_EXT_SUSP 0x53555350
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/* SBI function IDs for BASE extension*/
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#define SBI_EXT_BASE_GET_SPEC_VERSION 0x0
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@@ -236,6 +237,13 @@ enum sbi_pmu_ctr_type {
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#define SBI_EXT_DBCN_CONSOLE_READ 0x1
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#define SBI_EXT_DBCN_CONSOLE_WRITE_BYTE 0x2
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/* SBI function IDs for SUSP extension */
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#define SBI_EXT_SUSP_SUSPEND 0x0
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#define SBI_SUSP_SLEEP_TYPE_SUSPEND 0x0
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#define SBI_SUSP_SLEEP_TYPE_LAST SBI_SUSP_SLEEP_TYPE_SUSPEND
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#define SBI_SUSP_PLATFORM_SLEEP_START 0x80000000
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/* SBI base specification related macros */
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#define SBI_SPEC_VERSION_MAJOR_OFFSET 24
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#define SBI_SPEC_VERSION_MAJOR_MASK 0x7f
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@@ -43,4 +43,30 @@ bool sbi_system_reset_supported(u32 reset_type, u32 reset_reason);
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void __noreturn sbi_system_reset(u32 reset_type, u32 reset_reason);
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/** System suspend device */
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struct sbi_system_suspend_device {
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/** Name of the system suspend device */
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char name[32];
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/* Check whether sleep type is supported by the device */
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int (*system_suspend_check)(u32 sleep_type);
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/**
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* Suspend the system
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*
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* @sleep_type: The sleep type identifier passed to the SBI call.
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* @mmode_resume_addr:
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* This is the same as sbi_scratch.warmboot_addr. Some platforms
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* may not be able to return from system_suspend(), so they will
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* jump directly to this address instead. Platforms which can
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* return from system_suspend() may ignore this parameter.
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*/
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int (*system_suspend)(u32 sleep_type, unsigned long mmode_resume_addr);
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};
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const struct sbi_system_suspend_device *sbi_system_suspend_get_device(void);
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void sbi_system_suspend_set_device(struct sbi_system_suspend_device *dev);
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bool sbi_system_suspend_supported(u32 sleep_type);
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int sbi_system_suspend(u32 sleep_type, ulong resume_addr, ulong opaque);
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#endif
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