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lib: Add possible hart status values

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SBI HSM extension defines possible hart status values in the
specification.

Define all possible status values. Add a helper function to
convert hart state to status because hart states are internal
to OpenSBI only and may not match the status values defined in
the specification.

Signed-off-by: Atish Patra <atish.patra@wdc.com>
Reviewed-by: Anup Patel <anup.patel@wdc.com>
This commit is contained in:
Atish Patra
2020-02-11 17:32:38 -08:00
committed by Anup Patel
parent b677a9b8d6
commit 5b4824082f
3 changed files with 31 additions and 0 deletions
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5
include/sbi/sbi_ecall_interface.h
View File

@@ -51,6 +51,11 @@
#define SBI_EXT_RFENCE_REMOTE_HFENCE_VVMA 0x5
#define SBI_EXT_RFENCE_REMOTE_HFENCE_VVMA_ASID 0x6
#define SBI_HSM_HART_STATUS_STARTED 0x0
#define SBI_HSM_HART_STATUS_STOPPED 0x1
#define SBI_HSM_HART_STATUS_START_PENDING 0x2
#define SBI_HSM_HART_STATUS_STOP_PENDING 0x3
#define SBI_SPEC_VERSION_MAJOR_OFFSET 24
#define SBI_SPEC_VERSION_MAJOR_MASK 0x7f
#define SBI_SPEC_VERSION_MINOR_MASK 0xffffff

1
include/sbi/sbi_hsm.h
View File

@@ -25,6 +25,7 @@ int sbi_hsm_hart_start(struct sbi_scratch *scratch, u32 hartid,
ulong saddr, ulong priv);
int sbi_hsm_hart_stop(struct sbi_scratch *scratch, bool exitnow);
int sbi_hsm_hart_get_state(struct sbi_scratch *scratch, u32 hartid);
int sbi_hsm_hart_state_to_status(int state);
bool sbi_hsm_hart_started(struct sbi_scratch *scratch, u32 hartid);
void sbi_hsm_prepare_next_jump(struct sbi_scratch *scratch, u32 hartid);
#endif

25
lib/sbi/sbi_hsm.c
View File

@@ -14,6 +14,7 @@
#include <sbi/sbi_bits.h>
#include <sbi/sbi_console.h>
#include <sbi/sbi_error.h>
#include <sbi/sbi_ecall_interface.h>
#include <sbi/sbi_hart.h>
#include <sbi/sbi_hsm.h>
#include <sbi/sbi_init.h>
@@ -30,6 +31,30 @@ struct sbi_hsm_data {
atomic_t state;
};
int sbi_hsm_hart_state_to_status(int state)
{
int ret;
switch (state) {
case SBI_HART_STOPPED:
ret = SBI_HSM_HART_STATUS_STOPPED;
break;
case SBI_HART_STOPPING:
ret = SBI_HSM_HART_STATUS_STOP_PENDING;
break;
case SBI_HART_STARTING:
ret = SBI_HSM_HART_STATUS_START_PENDING;
break;
case SBI_HART_STARTED:
ret = SBI_HSM_HART_STATUS_STARTED;
break;
default:
ret = SBI_EINVAL;
}
return ret;
}
int sbi_hsm_hart_get_state(struct sbi_scratch *scratch, u32 hartid)
{
struct sbi_hsm_data *hdata;