19003fa0bSYatharth Kochar /* 27fabe1a8SRoberto Vargas * Copyright (c) 2015-2018, ARM Limited and Contributors. All rights reserved. 39003fa0bSYatharth Kochar * 482cb2c1aSdp-arm * SPDX-License-Identifier: BSD-3-Clause 59003fa0bSYatharth Kochar */ 69003fa0bSYatharth Kochar 79003fa0bSYatharth Kochar #include <arch.h> 89003fa0bSYatharth Kochar #include <arch_helpers.h> 99003fa0bSYatharth Kochar #include <assert.h> 109003fa0bSYatharth Kochar #include <auth_mod.h> 119003fa0bSYatharth Kochar #include <bl1.h> 127fabe1a8SRoberto Vargas #include <bl2u.h> 132a4b4b71SIsla Mitchell #include <bl_common.h> 140b32628eSAntonio Nino Diaz #include <console.h> 159003fa0bSYatharth Kochar #include <debug.h> 169003fa0bSYatharth Kochar #include <platform.h> 179003fa0bSYatharth Kochar #include <platform_def.h> 189003fa0bSYatharth Kochar #include <stdint.h> 199003fa0bSYatharth Kochar 20*6c373345SRoberto Vargas 219003fa0bSYatharth Kochar /******************************************************************************* 229003fa0bSYatharth Kochar * This function is responsible to: 239003fa0bSYatharth Kochar * Load SCP_BL2U if platform has defined SCP_BL2U_BASE 249003fa0bSYatharth Kochar * Perform platform setup. 259003fa0bSYatharth Kochar * Go back to EL3. 269003fa0bSYatharth Kochar ******************************************************************************/ 279003fa0bSYatharth Kochar void bl2u_main(void) 289003fa0bSYatharth Kochar { 299003fa0bSYatharth Kochar NOTICE("BL2U: %s\n", version_string); 309003fa0bSYatharth Kochar NOTICE("BL2U: %s\n", build_message); 319003fa0bSYatharth Kochar 329003fa0bSYatharth Kochar #if SCP_BL2U_BASE 339003fa0bSYatharth Kochar int rc; 349003fa0bSYatharth Kochar /* Load the subsequent bootloader images */ 359003fa0bSYatharth Kochar rc = bl2u_plat_handle_scp_bl2u(); 369003fa0bSYatharth Kochar if (rc) { 379003fa0bSYatharth Kochar ERROR("Failed to load SCP_BL2U (%i)\n", rc); 389003fa0bSYatharth Kochar panic(); 399003fa0bSYatharth Kochar } 409003fa0bSYatharth Kochar #endif 419003fa0bSYatharth Kochar 429003fa0bSYatharth Kochar /* Perform platform setup in BL2U after loading SCP_BL2U */ 439003fa0bSYatharth Kochar bl2u_platform_setup(); 449003fa0bSYatharth Kochar 450b32628eSAntonio Nino Diaz console_flush(); 460b32628eSAntonio Nino Diaz 471bd61d0aSYatharth Kochar #ifdef AARCH32 481bd61d0aSYatharth Kochar /* 491bd61d0aSYatharth Kochar * For AArch32 state BL1 and BL2U share the MMU setup. 501bd61d0aSYatharth Kochar * Given that BL2U does not map BL1 regions, MMU needs 511bd61d0aSYatharth Kochar * to be disabled in order to go back to BL1. 521bd61d0aSYatharth Kochar */ 531bd61d0aSYatharth Kochar disable_mmu_icache_secure(); 541bd61d0aSYatharth Kochar #endif /* AARCH32 */ 551bd61d0aSYatharth Kochar 569003fa0bSYatharth Kochar /* 579003fa0bSYatharth Kochar * Indicate that BL2U is done and resume back to 589003fa0bSYatharth Kochar * normal world via an SMC to BL1. 599003fa0bSYatharth Kochar * x1 could be passed to Normal world, 609003fa0bSYatharth Kochar * so DO NOT pass any secret information. 619003fa0bSYatharth Kochar */ 629003fa0bSYatharth Kochar smc(FWU_SMC_SEC_IMAGE_DONE, 0, 0, 0, 0, 0, 0, 0); 639003fa0bSYatharth Kochar wfi(); 649003fa0bSYatharth Kochar } 65