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// SPDX-License-Identifier: GPL-2.0
/*
* (C) Copyright 2024, Advanced Micro Devices, Inc.
*/
#include <command.h>
#include <errno.h>
#include <tee.h>
#include <vsprintf.h>
#define TA_HELLO_WORLD_CMD_INC_VALUE 0
/* This needs to match the UUID of the Hello World TA. */
#define TA_HELLO_WORLD_UUID \
{ 0x8aaaf200, 0x2450, 0x11e4, \
{ 0xab, 0xe2, 0x00, 0x02, 0xa5, 0xd5, 0xc5, 0x1b} }
static int hello_world_ta(unsigned int value)
{
const struct tee_optee_ta_uuid uuid = TA_HELLO_WORLD_UUID;
struct tee_open_session_arg session_arg;
struct udevice *tee = NULL;
struct tee_invoke_arg arg;
struct tee_param param[2];
int rc;
tee = tee_find_device(tee, NULL, NULL, NULL);
if (!tee)
return -ENODEV;
memset(&session_arg, 0, sizeof(session_arg));
tee_optee_ta_uuid_to_octets(session_arg.uuid, &uuid);
rc = tee_open_session(tee, &session_arg, 0, NULL);
if (rc) {
printf("tee_open_session(): failed(%d)\n", rc);
return rc;
}
arg.func = TA_HELLO_WORLD_CMD_INC_VALUE;
arg.session = session_arg.session;
param[0].attr = TEE_PARAM_ATTR_TYPE_VALUE_INOUT;
param[0].u.value.a = value;
printf("Value before: 0x%x\n", (int)param[0].u.value.a);
printf("Calling TA\n");
tee_invoke_func(tee, &arg, 1, param);
printf("Value after: 0x%x\n", (int)param[0].u.value.a);
return tee_close_session(tee, session_arg.session);
}
static int do_optee_hello_world_ta(struct cmd_tbl *cmdtp, int flag, int argc,
char * const argv[])
{
int ret, value = 0;
if (strcmp(argv[1], NULL))
value = hextoul(argv[1], NULL);
ret = hello_world_ta(value);
if (ret)
return CMD_RET_FAILURE;
return CMD_RET_SUCCESS;
}
U_BOOT_LONGHELP(optee,
"hello [<value>] Invoke the OP-TEE 'Hello World' TA\n");
U_BOOT_CMD_WITH_SUBCMDS(optee, "OP-TEE commands", optee_help_text,
U_BOOT_SUBCMD_MKENT(hello, 2, 1, do_optee_hello_world_ta));
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