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cmd: provide command sbi

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Provide a command to display information about the SBI implementation.

The output might look like:

=> sbi
SBI 0.2
OpenSBI
Extensions:
  sbi_set_timer
  sbi_console_putchar
  sbi_console_getchar
  sbi_clear_ipi
  sbi_send_ipi
  sbi_remote_fence_i
  sbi_remote_sfence_vma
  sbi_remote_sfence_vma_asid
  sbi_shutdown
  SBI Base Functionality
  Timer Extension
  IPI Extension
  RFENCE Extension
  Hart State Management Extension

The command can be used to construct a unit test checking that the
communication with the SEE is working.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Atish Patra <atish.patra@wdc.com>
Reviewed-by: Bin Meng <bin.meng@windriver.com>
Tested-by: Bin Meng <bin.meng@windriver.com>
Reviewed-by: Pragnesh Patel <pragnesh.patel@openfive.com>
Tested-by:  Pragnesh Patel <pragnesh.patel@openfive.com>
Reviewed-by: Rick Chen <rick@andestech.com>
Tested-by: Rick Chen <rick@andestech.com>
This commit is contained in:
Heinrich Schuchardt
2020-08-20 19:43:39 +02:00
committed by Andes
parent 27cef4e4a3
commit c92b50a44b
5 changed files with 127 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
arch/riscv/include/asm/sbi.h
View File

@@ -115,6 +115,8 @@ void sbi_remote_sfence_vma_asid(const unsigned long *hart_mask,
unsigned long asid);
#endif
void sbi_set_timer(uint64_t stime_value);
long sbi_get_spec_version(void);
int sbi_get_impl_id(void);
int sbi_probe_extension(int ext);
#endif

36
arch/riscv/lib/sbi.c
View File

@@ -53,6 +53,42 @@ void sbi_set_timer(uint64_t stime_value)
#endif
}
/**
* sbi_get_spec_version() - get current SBI specification version
*
* Return: version id
*/
long sbi_get_spec_version(void)
{
struct sbiret ret;
ret = sbi_ecall(SBI_EXT_BASE, SBI_EXT_BASE_GET_SPEC_VERSION,
0, 0, 0, 0, 0, 0);
if (!ret.error)
if (ret.value)
return ret.value;
return -ENOTSUPP;
}
/**
* sbi_get_impl_id() - get SBI implementation ID
*
* Return: implementation ID
*/
int sbi_get_impl_id(void)
{
struct sbiret ret;
ret = sbi_ecall(SBI_EXT_BASE, SBI_EXT_BASE_GET_IMP_ID,
0, 0, 0, 0, 0, 0);
if (!ret.error)
if (ret.value)
return ret.value;
return -ENOTSUPP;
}
/**
* sbi_probe_extension() - Check if an SBI extension ID is supported or not.
* @extid: The extension ID to be probed.