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/*
* Copyright (c) 2022, ARM Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#include <common/debug.h>
#include <services/el3_spmc_logical_sp.h>
#include <services/ffa_svc.h>
#include <smccc_helpers.h>
#define LP_PARTITION_ID 0xC001
#define LP_UUID {0x47a3bf57, 0xe98e43ad, 0xb7db524f, 0x1588f4e3}
/* Our Logical SP currently only supports receipt of direct messaging. */
#define PARTITION_PROPERTIES FFA_PARTITION_DIRECT_REQ_RECV
static int32_t sp_init(void)
{
INFO("LSP: Init function called.\n");
return 0;
}
static uint64_t handle_ffa_direct_request(uint32_t smc_fid, bool secure_origin,
uint64_t x1, uint64_t x2, uint64_t x3,
uint64_t x4, void *cookie,
void *handle, uint64_t flags)
{
uint64_t ret;
/* Determine if we have a 64 or 32 direct request. */
if (smc_fid == FFA_MSG_SEND_DIRECT_REQ_SMC32) {
ret = FFA_MSG_SEND_DIRECT_RESP_SMC32;
} else if (smc_fid == FFA_MSG_SEND_DIRECT_REQ_SMC64) {
ret = FFA_MSG_SEND_DIRECT_RESP_SMC64;
} else {
panic(); /* Unknown SMC. */
}
/*
* Handle the incoming request. For testing purposes we echo the
* incoming message.
*/
INFO("Logical Partition: Received Direct Request from %s world!\n",
secure_origin ? "Secure" : "Normal");
/*
* Logical SP's must always send a direct response so we can populate
* our response directly.
*/
SMC_RET8(handle, ret, 0, 0, x4, 0, 0, 0, 0);
}
/* Register logical partition */
DECLARE_LOGICAL_PARTITION(
my_logical_partition,
sp_init, /* Init Function */
LP_PARTITION_ID, /* FF-A Partition ID */
LP_UUID, /* UUID */
PARTITION_PROPERTIES, /* Partition Properties. */
handle_ffa_direct_request /* Callback for direct requests. */
);
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