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lib: sbi: Add sbi_hart_reinit() function

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We add sbi_hart_reinit() function which will re-initialize HART CSRs
assuming HART features are already detected. This new function will
be useful in re-initializing HART after it resumes from HSM SUSPENDED
state.

Signed-off-by: Anup Patel <anup.patel@wdc.com>
Reviewed-by: Atish Patra <atish.patra@wdc.com>
This commit is contained in:
Anup Patel
2021-02-05 17:32:30 +05:30
committed by Anup Patel
parent 6290a22e34
commit 4b05df6700
2 changed files with 18 additions and 12 deletions
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1
include/sbi/sbi_hart.h
View File

@@ -27,6 +27,7 @@ enum sbi_hart_features {
struct sbi_scratch;
int sbi_hart_reinit(struct sbi_scratch *scratch);
int sbi_hart_init(struct sbi_scratch *scratch, bool cold_boot);
extern void (*sbi_hart_expected_trap)(void);

29
lib/sbi/sbi_hart.c
View File

@@ -430,10 +430,25 @@ __mhpm_skip:
hfeatures->features |= SBI_HART_HAS_TIME;
}
int sbi_hart_init(struct sbi_scratch *scratch, bool cold_boot)
int sbi_hart_reinit(struct sbi_scratch *scratch)
{
int rc;
mstatus_init(scratch);
rc = fp_init(scratch);
if (rc)
return rc;
rc = delegate_traps(scratch);
if (rc)
return rc;
return 0;
}
int sbi_hart_init(struct sbi_scratch *scratch, bool cold_boot)
{
if (cold_boot) {
if (misa_extension('H'))
sbi_hart_expected_trap = &__sbi_expected_trap_hext;
@@ -447,17 +462,7 @@ int sbi_hart_init(struct sbi_scratch *scratch, bool cold_boot)
hart_detect_features(scratch);
mstatus_init(scratch);
rc = fp_init(scratch);
if (rc)
return rc;
rc = delegate_traps(scratch);
if (rc)
return rc;
return 0;
return sbi_hart_reinit(scratch);
}
void __attribute__((noreturn)) sbi_hart_hang(void)