riscv: sbi: Add HSM extension functions
Add helper functions to perform hart-related operations to prepare for
the HSM tests. Also add the HSM state IDs and default suspend type
constants.
Reviewed-by: Andrew Jones <andrew.jones@linux.dev>
Signed-off-by: James Raphael Tiovalen <jamestiotio@gmail.com>
Signed-off-by: Andrew Jones <andrew.jones@linux.dev>
diff --git a/lib/riscv/asm/sbi.h b/lib/riscv/asm/sbi.h
index e032444..1319439 100644
--- a/lib/riscv/asm/sbi.h
+++ b/lib/riscv/asm/sbi.h
@@ -49,6 +49,21 @@
SBI_EXT_IPI_SEND_IPI = 0,
};
+enum sbi_ext_hsm_sid {
+ SBI_EXT_HSM_STARTED = 0,
+ SBI_EXT_HSM_STOPPED,
+ SBI_EXT_HSM_START_PENDING,
+ SBI_EXT_HSM_STOP_PENDING,
+ SBI_EXT_HSM_SUSPENDED,
+ SBI_EXT_HSM_SUSPEND_PENDING,
+ SBI_EXT_HSM_RESUME_PENDING,
+};
+
+enum sbi_ext_hsm_hart_suspend_type {
+ SBI_EXT_HSM_HART_SUSPEND_RETENTIVE = 0,
+ SBI_EXT_HSM_HART_SUSPEND_NON_RETENTIVE = 0x80000000,
+};
+
enum sbi_ext_dbcn_fid {
SBI_EXT_DBCN_CONSOLE_WRITE = 0,
SBI_EXT_DBCN_CONSOLE_READ,
@@ -67,6 +82,8 @@
void sbi_shutdown(void);
struct sbiret sbi_hart_start(unsigned long hartid, unsigned long entry, unsigned long sp);
+struct sbiret sbi_hart_stop(void);
+struct sbiret sbi_hart_get_status(unsigned long hartid);
struct sbiret sbi_send_ipi(unsigned long hart_mask, unsigned long hart_mask_base);
struct sbiret sbi_send_ipi_cpu(int cpu);
struct sbiret sbi_send_ipi_cpumask(const cpumask_t *mask);
diff --git a/lib/riscv/sbi.c b/lib/riscv/sbi.c
index ecc63ac..8972e76 100644
--- a/lib/riscv/sbi.c
+++ b/lib/riscv/sbi.c
@@ -42,6 +42,16 @@
return sbi_ecall(SBI_EXT_HSM, SBI_EXT_HSM_HART_START, hartid, entry, sp, 0, 0, 0);
}
+struct sbiret sbi_hart_stop(void)
+{
+ return sbi_ecall(SBI_EXT_HSM, SBI_EXT_HSM_HART_STOP, 0, 0, 0, 0, 0, 0);
+}
+
+struct sbiret sbi_hart_get_status(unsigned long hartid)
+{
+ return sbi_ecall(SBI_EXT_HSM, SBI_EXT_HSM_HART_STATUS, hartid, 0, 0, 0, 0, 0);
+}
+
struct sbiret sbi_send_ipi(unsigned long hart_mask, unsigned long hart_mask_base)
{
return sbi_ecall(SBI_EXT_IPI, SBI_EXT_IPI_SEND_IPI, hart_mask, hart_mask_base, 0, 0, 0, 0);
