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riscv: Add 3 SBI wrapper functions to get cpu manufacturer information

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Add 3 wrapper functions to get vendor id, architecture id and implement id
from M-mode

Signed-off-by: Vincent Chen <vincent.chen@sifive.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
This commit is contained in:
Vincent Chen 2021-03-22 22:26:02 +08:00 committed by Palmer Dabbelt
parent 7d0bc44bd0
commit 183787c6fc
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GPG Key ID: 2E1319F35FBB1889
2 changed files with 18 additions and 0 deletions
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3
arch/riscv/include/asm/sbi.h
View File

@ -97,6 +97,9 @@ struct sbiret sbi_ecall(int ext, int fid, unsigned long arg0,
void sbi_console_putchar(int ch);
int sbi_console_getchar(void);
long sbi_get_mvendorid(void);
long sbi_get_marchid(void);
long sbi_get_mimpid(void);
void sbi_set_timer(uint64_t stime_value);
void sbi_shutdown(void);
void sbi_clear_ipi(void);

15
arch/riscv/kernel/sbi.c
View File

@ -547,6 +547,21 @@ static inline long sbi_get_firmware_version(void)
return __sbi_base_ecall(SBI_EXT_BASE_GET_IMP_VERSION);
}
long sbi_get_mvendorid(void)
{
return __sbi_base_ecall(SBI_EXT_BASE_GET_MVENDORID);
}
long sbi_get_marchid(void)
{
return __sbi_base_ecall(SBI_EXT_BASE_GET_MARCHID);
}
long sbi_get_mimpid(void)
{
return __sbi_base_ecall(SBI_EXT_BASE_GET_MIMPID);
}
static void sbi_send_cpumask_ipi(const struct cpumask *target)
{
struct cpumask hartid_mask;