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riscv: function to retrieve SBI implementation version

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Provide function sbi_get_impl_version() to retrieve the SBI implementation
version.

Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
Reviewed-by: Leo Yu-Chi Liang <ycliang@andestech.com>
Reviewed-by: Rick Chen <rick@andestech.com>
This commit is contained in:
Heinrich Schuchardt 2021-10-25 15:09:34 +02:00 • committed by Leo Yu-Chi Liang
parent 52207514ba
commit afb8e1f067
2 changed files with 20 additions and 0 deletions
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1
arch/riscv/include/asm/sbi.h
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@ -152,6 +152,7 @@ void sbi_remote_sfence_vma_asid(const unsigned long *hart_mask,
void sbi_set_timer(uint64_t stime_value);
long sbi_get_spec_version(void);
int sbi_get_impl_id(void);
int sbi_get_impl_version(long *version);
int sbi_probe_extension(int ext);
void sbi_srst_reset(unsigned long type, unsigned long reason);

19
arch/riscv/lib/sbi.c
View file

@ -89,6 +89,25 @@ int sbi_get_impl_id(void)
return -ENOTSUPP;
}
/**
* sbi_get_impl_version() - get SBI implementation version
*
* @version: pointer to receive version
* Return: 0 on success, -ENOTSUPP otherwise
*/
int sbi_get_impl_version(long *version)
{
struct sbiret ret;
ret = sbi_ecall(SBI_EXT_BASE, SBI_EXT_BASE_GET_IMP_VERSION,
0, 0, 0, 0, 0, 0);
if (ret.error)
return -ENOTSUPP;
if (version)
*version = ret.value;
return 0;
}
/**
* sbi_probe_extension() - Check if an SBI extension ID is supported or not.
* @extid: The extension ID to be probed.