Provide library functions to read:
* machine vendor ID * machine architecture ID * machine implementation ID
Signed-off-by: Heinrich Schuchardt heinrich.schuchardt@canonical.com --- arch/riscv/include/asm/sbi.h | 3 ++ arch/riscv/lib/sbi.c | 65 ++++++++++++++++++++++++++++++++++++ 2 files changed, 68 insertions(+)
diff --git a/arch/riscv/include/asm/sbi.h b/arch/riscv/include/asm/sbi.h index 76453121ea..81fcfe0b36 100644 --- a/arch/riscv/include/asm/sbi.h +++ b/arch/riscv/include/asm/sbi.h @@ -155,6 +155,9 @@ 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); +int sbi_get_mvendorid(long *mvendorid); +int sbi_get_marchid(long *marchid); +int sbi_get_mimpid(long *mimpid); void sbi_srst_reset(unsigned long type, unsigned long reason);
#endif diff --git a/arch/riscv/lib/sbi.c b/arch/riscv/lib/sbi.c index d427d1b29e..8724e3a460 100644 --- a/arch/riscv/lib/sbi.c +++ b/arch/riscv/lib/sbi.c @@ -127,6 +127,71 @@ int sbi_probe_extension(int extid) return -ENOTSUPP; }
+/** + * sbi_get_mvendorid() - get machine vendor ID + * + * @mimpid: on return machine vendor ID + * Return: 0 on success + */ +int sbi_get_mvendorid(long *mvendorid) +{ + struct sbiret ret; + + ret = sbi_ecall(SBI_EXT_BASE, SBI_EXT_BASE_GET_MVENDORID, + 0, 0, 0, 0, 0, 0); + if (ret.error) + return -ENOTSUPP; + + if (mvendorid) + *mvendorid = ret.value; + + return 0; +} + +/** + * sbi_get_marchid() - get machine architecture ID + * + * @mimpid: on return machine architecture ID + * Return: 0 on success + */ +int sbi_get_marchid(long *marchid) +{ + struct sbiret ret; + + ret = sbi_ecall(SBI_EXT_BASE, SBI_EXT_BASE_GET_MARCHID, + 0, 0, 0, 0, 0, 0); + + if (ret.error) + return -ENOTSUPP; + + if (marchid) + *marchid = ret.value; + + return 0; +} + +/** + * sbi_get_mimpid() - get machine implementation ID + * + * @mimpid: on return machine implementation ID + * Return: 0 on success + */ +int sbi_get_mimpid(long *mimpid) +{ + struct sbiret ret; + + ret = sbi_ecall(SBI_EXT_BASE, SBI_EXT_BASE_GET_MIMPID, + 0, 0, 0, 0, 0, 0); + + if (ret.error) + return -ENOTSUPP; + + if (mimpid) + *mimpid = ret.value; + + return 0; +} + /** * sbi_srst_reset() - invoke system reset extension *