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// SPDX-License-Identifier: GPL-2.0
#include <common.h>
#include <command.h>
#include <getopt.h>
#include <asm/psci.h>
#include <asm/secure.h>
#include <linux/arm-smccc.h>
void second_entry(void)
{
struct arm_smccc_res res;
psci_printf("2nd CPU online, now turn off again\n");
arm_smccc_smc(ARM_PSCI_0_2_FN_CPU_OFF,
0, 0, 0, 0, 0, 0, 0, &res);
psci_printf("2nd CPU still alive?\n");
while (1);
}
static const char *psci_xlate_str(long err)
{
static char errno_string[sizeof "error 0x123456789ABCDEF0"];
switch(err)
{
case ARM_PSCI_RET_SUCCESS:
return "Success";
case ARM_PSCI_RET_NOT_SUPPORTED:
return "Operation not supported";
case ARM_PSCI_RET_INVAL:
return "Invalid argument";
case ARM_PSCI_RET_DENIED:
return "Operation not permitted";
case ARM_PSCI_RET_ALREADY_ON:
return "CPU already on";
case ARM_PSCI_RET_ON_PENDING:
return "CPU_ON in progress";
case ARM_PSCI_RET_INTERNAL_FAILURE:
return "Internal failure";
case ARM_PSCI_RET_NOT_PRESENT:
return "Trusted OS not present on core";
case ARM_PSCI_RET_DISABLED:
return "CPU is disabled";
case ARM_PSCI_RET_INVALID_ADDRESS:
return "Bad address";
}
sprintf(errno_string, "error 0x%lx", err);
return errno_string;
}
static int do_smc(int argc, char *argv[])
{
long ret;
int opt;
struct arm_smccc_res res = {
.a0 = 0xdeadbee0,
.a1 = 0xdeadbee1,
.a2 = 0xdeadbee2,
.a3 = 0xdeadbee3,
};
if (argc < 2)
return COMMAND_ERROR_USAGE;
while ((opt = getopt(argc, argv, "nic")) > 0) {
switch (opt) {
case 'n':
armv7_secure_monitor_install();
break;
case 'i':
arm_smccc_smc(ARM_PSCI_0_2_FN_PSCI_VERSION,
0, 0, 0, 0, 0, 0, 0, &res);
printf("found psci version %ld.%ld\n", res.a0 >> 16, res.a0 & 0xffff);
break;
case 'c':
arm_smccc_smc(ARM_PSCI_0_2_FN_CPU_ON,
1, (unsigned long)second_entry, 0, 0, 0, 0, 0, &res);
ret = (long)res.a0;
printf("CPU_ON returns with: %s\n", psci_xlate_str(ret));
if (ret)
return COMMAND_ERROR;
}
}
return 0;
}
BAREBOX_CMD_HELP_START(smc)
BAREBOX_CMD_HELP_TEXT("Secure monitor code test command")
BAREBOX_CMD_HELP_TEXT("")
BAREBOX_CMD_HELP_TEXT("Options:")
BAREBOX_CMD_HELP_OPT ("-n", "Install secure monitor and switch to nonsecure mode")
BAREBOX_CMD_HELP_OPT ("-i", "Show information about installed PSCI version")
BAREBOX_CMD_HELP_OPT ("-c", "Start secondary CPU core")
BAREBOX_CMD_HELP_END
BAREBOX_CMD_START(smc)
.cmd = do_smc,
BAREBOX_CMD_DESC("secure monitor test command")
BAREBOX_CMD_GROUP(CMD_GRP_MISC)
BAREBOX_CMD_END
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