1 /* 2 * Copyright 2016 NXP Semiconductor, Inc. 3 * 4 * SPDX-License-Identifier: GPL-2.0+ 5 */ 6 7 #include <common.h> 8 #include <asm/psci.h> 9 #include <asm/system.h> 10 #ifdef CONFIG_ARMV8_SEC_FIRMWARE_SUPPORT 11 #include <asm/armv8/sec_firmware.h> 12 #endif 13 14 int psci_update_dt(void *fdt) 15 { 16 #ifdef CONFIG_MP 17 #if defined(CONFIG_ARMV8_PSCI) || defined(CONFIG_FSL_PPA_ARMV8_PSCI) 18 19 #ifdef CONFIG_ARMV8_SEC_FIRMWARE_SUPPORT 20 /* 21 * If the PSCI in SEC Firmware didn't work, avoid to update the 22 * device node of PSCI. But still return 0 instead of an error 23 * number to support detecting PSCI dynamically and then switching 24 * the SMP boot method between PSCI and spin-table. 25 */ 26 if (sec_firmware_support_psci_version() == 0xffffffff) 27 return 0; 28 #endif 29 fdt_psci(fdt); 30 31 #if defined(CONFIG_ARMV8_PSCI) && !defined(CONFIG_ARMV8_SECURE_BASE) 32 /* secure code lives in RAM, keep it alive */ 33 fdt_add_mem_rsv(fdt, (unsigned long)__secure_start, 34 __secure_end - __secure_start); 35 #endif 36 37 #endif 38 #endif 39 return 0; 40 } 41