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[RFC,v2,4/8] RISC-V: Add SBI HSM suspend related defines

Message ID 20210316104140.878019-5-anup.patel@wdc.com
State Superseded
Headers show
Series RISC-V CPU Idle Support | expand

Commit Message

Anup Patel March 16, 2021, 10:41 a.m. UTC 
We add defines related to SBI HSM suspend call and also
update HSM states naming as-per latest SBI specification.

Signed-off-by: Anup Patel <anup.patel@wdc.com>
---
 arch/riscv/include/asm/sbi.h    | 27 ++++++++++++++++++++++-----
 arch/riscv/kernel/cpu_ops_sbi.c |  2 +-
 2 files changed, 23 insertions(+), 6 deletions(-)
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Patch

diff --git a/arch/riscv/include/asm/sbi.h b/arch/riscv/include/asm/sbi.h
index 79fa9f28b786..4bdccec77a84 100644
--- a/arch/riscv/include/asm/sbi.h
+++ b/arch/riscv/include/asm/sbi.h
@@ -62,15 +62,32 @@  enum sbi_ext_hsm_fid {
 	SBI_EXT_HSM_HART_START = 0,
 	SBI_EXT_HSM_HART_STOP,
 	SBI_EXT_HSM_HART_STATUS,
+	SBI_EXT_HSM_HART_SUSPEND,
 };
 
-enum sbi_hsm_hart_status {
-	SBI_HSM_HART_STATUS_STARTED = 0,
-	SBI_HSM_HART_STATUS_STOPPED,
-	SBI_HSM_HART_STATUS_START_PENDING,
-	SBI_HSM_HART_STATUS_STOP_PENDING,
+enum sbi_hsm_hart_state {
+	SBI_HSM_STATE_STARTED = 0,
+	SBI_HSM_STATE_STOPPED,
+	SBI_HSM_STATE_START_PENDING,
+	SBI_HSM_STATE_STOP_PENDING,
+	SBI_HSM_STATE_SUSPENDED,
+	SBI_HSM_STATE_SUSPEND_PENDING,
+	SBI_HSM_STATE_RESUME_PENDING,
 };
 
+#define SBI_HSM_SUSP_BASE_MASK			0x7fffffff
+#define SBI_HSM_SUSP_NON_RET_BIT		0x80000000
+#define SBI_HSM_SUSP_PLAT_BASE			0x10000000
+
+#define SBI_HSM_SUSPEND_RET_DEFAULT		0x00000000
+#define SBI_HSM_SUSPEND_RET_PLATFORM		SBI_HSM_SUSP_PLAT_BASE
+#define SBI_HSM_SUSPEND_RET_LAST		SBI_HSM_SUSP_BASE_MASK
+#define SBI_HSM_SUSPEND_NON_RET_DEFAULT		SBI_HSM_SUSP_NON_RET_BIT
+#define SBI_HSM_SUSPEND_NON_RET_PLATFORM	(SBI_HSM_SUSP_NON_RET_BIT | \
+						 SBI_HSM_SUSP_PLAT_BASE)
+#define SBI_HSM_SUSPEND_NON_RET_LAST		(SBI_HSM_SUSP_NON_RET_BIT | \
+						 SBI_HSM_SUSP_BASE_MASK)
+
 enum sbi_ext_srst_fid {
 	SBI_EXT_SRST_RESET = 0,
 };
diff --git a/arch/riscv/kernel/cpu_ops_sbi.c b/arch/riscv/kernel/cpu_ops_sbi.c
index 685fae72b7f5..5fd90f03a3e9 100644
--- a/arch/riscv/kernel/cpu_ops_sbi.c
+++ b/arch/riscv/kernel/cpu_ops_sbi.c
@@ -97,7 +97,7 @@  static int sbi_cpu_is_stopped(unsigned int cpuid)
 
 	rc = sbi_hsm_hart_get_status(hartid);
 
-	if (rc == SBI_HSM_HART_STATUS_STOPPED)
+	if (rc == SBI_HSM_STATE_STOPPED)
 		return 0;
 	return rc;
 }