1*54fd6939SJiyong Park /*
2*54fd6939SJiyong Park * Copyright (c) 2015-2020, ARM Limited and Contributors. All rights reserved.
3*54fd6939SJiyong Park *
4*54fd6939SJiyong Park * SPDX-License-Identifier: BSD-3-Clause
5*54fd6939SJiyong Park */
6*54fd6939SJiyong Park
7*54fd6939SJiyong Park #include <assert.h>
8*54fd6939SJiyong Park #include <stdint.h>
9*54fd6939SJiyong Park
10*54fd6939SJiyong Park #include <platform_def.h>
11*54fd6939SJiyong Park
12*54fd6939SJiyong Park #include <arch.h>
13*54fd6939SJiyong Park #include <arch_helpers.h>
14*54fd6939SJiyong Park #include <bl1/bl1.h>
15*54fd6939SJiyong Park #include <bl2u/bl2u.h>
16*54fd6939SJiyong Park #include <common/bl_common.h>
17*54fd6939SJiyong Park #include <common/debug.h>
18*54fd6939SJiyong Park #include <drivers/auth/auth_mod.h>
19*54fd6939SJiyong Park #include <drivers/console.h>
20*54fd6939SJiyong Park #include <plat/common/platform.h>
21*54fd6939SJiyong Park
22*54fd6939SJiyong Park /*******************************************************************************
23*54fd6939SJiyong Park * This function is responsible to:
24*54fd6939SJiyong Park * Load SCP_BL2U if platform has defined SCP_BL2U_BASE
25*54fd6939SJiyong Park * Perform platform setup.
26*54fd6939SJiyong Park * Go back to EL3.
27*54fd6939SJiyong Park ******************************************************************************/
bl2u_main(void)28*54fd6939SJiyong Park void bl2u_main(void)
29*54fd6939SJiyong Park {
30*54fd6939SJiyong Park NOTICE("BL2U: %s\n", version_string);
31*54fd6939SJiyong Park NOTICE("BL2U: %s\n", build_message);
32*54fd6939SJiyong Park
33*54fd6939SJiyong Park #if SCP_BL2U_BASE
34*54fd6939SJiyong Park int rc;
35*54fd6939SJiyong Park /* Load the subsequent bootloader images */
36*54fd6939SJiyong Park rc = bl2u_plat_handle_scp_bl2u();
37*54fd6939SJiyong Park if (rc != 0) {
38*54fd6939SJiyong Park ERROR("Failed to load SCP_BL2U (%i)\n", rc);
39*54fd6939SJiyong Park panic();
40*54fd6939SJiyong Park }
41*54fd6939SJiyong Park #endif
42*54fd6939SJiyong Park
43*54fd6939SJiyong Park /* Perform platform setup in BL2U after loading SCP_BL2U */
44*54fd6939SJiyong Park bl2u_platform_setup();
45*54fd6939SJiyong Park
46*54fd6939SJiyong Park console_flush();
47*54fd6939SJiyong Park
48*54fd6939SJiyong Park #ifndef __aarch64__
49*54fd6939SJiyong Park /*
50*54fd6939SJiyong Park * For AArch32 state BL1 and BL2U share the MMU setup.
51*54fd6939SJiyong Park * Given that BL2U does not map BL1 regions, MMU needs
52*54fd6939SJiyong Park * to be disabled in order to go back to BL1.
53*54fd6939SJiyong Park */
54*54fd6939SJiyong Park disable_mmu_icache_secure();
55*54fd6939SJiyong Park #endif /* !__aarch64__ */
56*54fd6939SJiyong Park
57*54fd6939SJiyong Park /*
58*54fd6939SJiyong Park * Indicate that BL2U is done and resume back to
59*54fd6939SJiyong Park * normal world via an SMC to BL1.
60*54fd6939SJiyong Park * x1 could be passed to Normal world,
61*54fd6939SJiyong Park * so DO NOT pass any secret information.
62*54fd6939SJiyong Park */
63*54fd6939SJiyong Park smc(FWU_SMC_SEC_IMAGE_DONE, 0, 0, 0, 0, 0, 0, 0);
64*54fd6939SJiyong Park wfi();
65*54fd6939SJiyong Park }
66