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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
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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.

6
cmd/Kconfig
View file

@ -270,6 +270,12 @@ config SPL_CMD_TLV_EEPROM
help
Read system EEPROM data block in ONIE Tlvinfo format from SPL.
config CMD_SBI
bool "sbi"
depends on RISCV_SMODE && SBI_V02
help
Display information about the SBI implementation.
endmenu
menu "Boot commands"

1
cmd/riscv/Makefile
View file

@ -1,3 +1,4 @@
# SPDX-License-Identifier: GPL-2.0+
obj-$(CONFIG_CMD_EXCEPTION) += exception.o
obj-$(CONFIG_CMD_SBI) += sbi.o

82
cmd/riscv/sbi.c Normal file
View file

@ -0,0 +1,82 @@
// SPDX-License-Identifier: GPL-2.0+
/*
* The 'sbi' command displays information about the SBI implementation.
*
* Copyright (c) 2020, Heinrich Schuchardt <xypron.glpk@gmx.de>
*/
#include <common.h>
#include <command.h>
#include <asm/sbi.h>
struct sbi_ext {
const u32 id;
const char *name;
};
static struct sbi_ext extensions[] = {
{ 0x00000000, "sbi_set_timer" },
{ 0x00000001, "sbi_console_putchar" },
{ 0x00000002, "sbi_console_getchar" },
{ 0x00000003, "sbi_clear_ipi" },
{ 0x00000004, "sbi_send_ipi" },
{ 0x00000005, "sbi_remote_fence_i" },
{ 0x00000006, "sbi_remote_sfence_vma" },
{ 0x00000007, "sbi_remote_sfence_vma_asid" },
{ 0x00000008, "sbi_shutdown" },
{ 0x00000010, "SBI Base Functionality" },
{ 0x54494D45, "Timer Extension" },
{ 0x00735049, "IPI Extension" },
{ 0x52464E43, "RFENCE Extension" },
{ 0x0048534D, "Hart State Management Extension" },
};
static int do_sbi(struct cmd_tbl *cmdtp, int flag, int argc,
char *const argv[])
{
int i;
long ret;
ret = sbi_get_spec_version();
if (ret >= 0)
printf("SBI %ld.%ld\n", ret >> 24, ret & 0xffffff);
ret = sbi_get_impl_id();
if (ret >= 0) {
switch (ret) {
case 0:
printf("Berkeley Boot Loader (BBL)\n");
break;
case 1:
printf("OpenSBI\n");
break;
case 2:
printf("Xvisor\n");
break;
case 3:
printf("KVM\n");
break;
default:
printf("Unknown implementation\n");
break;
}
}
printf("Extensions:\n");
for (i = 0; i < ARRAY_SIZE(extensions); ++i) {
ret = sbi_probe_extension(extensions[i].id);
if (ret > 0)
printf(" %s\n", extensions[i].name);
}
return 0;
}
#ifdef CONFIG_SYS_LONGHELP
static char sbi_help_text[] =
"- display SBI spec version, implementation, and available extensions";
#endif
U_BOOT_CMD_COMPLETE(
sbi, 1, 0, do_sbi,
"display SBI information",
sbi_help_text, NULL
);