19003fa0bSYatharth Kochar /* 20b32628eSAntonio Nino Diaz * Copyright (c) 2015-2017, 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 <bl_common.h> 129003fa0bSYatharth Kochar #include <bl1.h> 130b32628eSAntonio Nino Diaz #include <console.h> 149003fa0bSYatharth Kochar #include <debug.h> 159003fa0bSYatharth Kochar #include <platform.h> 169003fa0bSYatharth Kochar #include <platform_def.h> 179003fa0bSYatharth Kochar #include <stdint.h> 189003fa0bSYatharth Kochar 199003fa0bSYatharth Kochar /******************************************************************************* 209003fa0bSYatharth Kochar * This function is responsible to: 219003fa0bSYatharth Kochar * Load SCP_BL2U if platform has defined SCP_BL2U_BASE 229003fa0bSYatharth Kochar * Perform platform setup. 239003fa0bSYatharth Kochar * Go back to EL3. 249003fa0bSYatharth Kochar ******************************************************************************/ 259003fa0bSYatharth Kochar void bl2u_main(void) 269003fa0bSYatharth Kochar { 279003fa0bSYatharth Kochar NOTICE("BL2U: %s\n", version_string); 289003fa0bSYatharth Kochar NOTICE("BL2U: %s\n", build_message); 299003fa0bSYatharth Kochar 309003fa0bSYatharth Kochar #if SCP_BL2U_BASE 319003fa0bSYatharth Kochar int rc; 329003fa0bSYatharth Kochar /* Load the subsequent bootloader images */ 339003fa0bSYatharth Kochar rc = bl2u_plat_handle_scp_bl2u(); 349003fa0bSYatharth Kochar if (rc) { 359003fa0bSYatharth Kochar ERROR("Failed to load SCP_BL2U (%i)\n", rc); 369003fa0bSYatharth Kochar panic(); 379003fa0bSYatharth Kochar } 389003fa0bSYatharth Kochar #endif 399003fa0bSYatharth Kochar 409003fa0bSYatharth Kochar /* Perform platform setup in BL2U after loading SCP_BL2U */ 419003fa0bSYatharth Kochar bl2u_platform_setup(); 429003fa0bSYatharth Kochar 430b32628eSAntonio Nino Diaz console_flush(); 440b32628eSAntonio Nino Diaz 45*1bd61d0aSYatharth Kochar #ifdef AARCH32 46*1bd61d0aSYatharth Kochar /* 47*1bd61d0aSYatharth Kochar * For AArch32 state BL1 and BL2U share the MMU setup. 48*1bd61d0aSYatharth Kochar * Given that BL2U does not map BL1 regions, MMU needs 49*1bd61d0aSYatharth Kochar * to be disabled in order to go back to BL1. 50*1bd61d0aSYatharth Kochar */ 51*1bd61d0aSYatharth Kochar disable_mmu_icache_secure(); 52*1bd61d0aSYatharth Kochar #endif /* AARCH32 */ 53*1bd61d0aSYatharth Kochar 549003fa0bSYatharth Kochar /* 559003fa0bSYatharth Kochar * Indicate that BL2U is done and resume back to 569003fa0bSYatharth Kochar * normal world via an SMC to BL1. 579003fa0bSYatharth Kochar * x1 could be passed to Normal world, 589003fa0bSYatharth Kochar * so DO NOT pass any secret information. 599003fa0bSYatharth Kochar */ 609003fa0bSYatharth Kochar smc(FWU_SMC_SEC_IMAGE_DONE, 0, 0, 0, 0, 0, 0, 0); 619003fa0bSYatharth Kochar wfi(); 629003fa0bSYatharth Kochar } 63