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1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  * Copyright 2016 NXP Semiconductor, Inc.
4  */
5
6 #include <common.h>
7 #include <asm/psci.h>
8 #include <asm/system.h>
9 #include <asm/armv8/sec_firmware.h>
10
11 #ifdef CONFIG_ARMV8_SEC_FIRMWARE_SUPPORT
12 int psci_update_dt(void *fdt)
13 {
14         /*
15          * If the PSCI in SEC Firmware didn't work, avoid to update the
16          * device node of PSCI. But still return 0 instead of an error
17          * number to support detecting PSCI dynamically and then switching
18          * the SMP boot method between PSCI and spin-table.
19          */
20         if (sec_firmware_support_psci_version() == PSCI_INVALID_VER)
21                 return 0;
22         fdt_psci(fdt);
23
24 #if defined(CONFIG_ARMV8_PSCI) && !defined(CONFIG_ARMV8_SECURE_BASE)
25         /* secure code lives in RAM, keep it alive */
26         fdt_add_mem_rsv(fdt, (unsigned long)__secure_start,
27                         __secure_end - __secure_start);
28 #endif
29
30         return 0;
31 }
32 #endif