1 /*
2 * Copyright (c) 2015-2017, ARM Limited and Contributors. All rights reserved.
3 *
4 * SPDX-License-Identifier: BSD-3-Clause
5 */
6
7 #include <arch.h>
8 #include <arch_helpers.h>
9 #include <assert.h>
10 #include <auth_mod.h>
11 #include <bl1.h>
12 #include <bl_common.h>
13 #include <console.h>
14 #include <debug.h>
15 #include <platform.h>
16 #include <platform_def.h>
17 #include <stdint.h>
18
19 /*******************************************************************************
20 * This function is responsible to:
21 * Load SCP_BL2U if platform has defined SCP_BL2U_BASE
22 * Perform platform setup.
23 * Go back to EL3.
24 ******************************************************************************/
bl2u_main(void)25 void bl2u_main(void)
26 {
27 NOTICE("BL2U: %s\n", version_string);
28 NOTICE("BL2U: %s\n", build_message);
29
30 #if SCP_BL2U_BASE
31 int rc;
32 /* Load the subsequent bootloader images */
33 rc = bl2u_plat_handle_scp_bl2u();
34 if (rc) {
35 ERROR("Failed to load SCP_BL2U (%i)\n", rc);
36 panic();
37 }
38 #endif
39
40 /* Perform platform setup in BL2U after loading SCP_BL2U */
41 bl2u_platform_setup();
42
43 console_flush();
44
45 #ifdef AARCH32
46 /*
47 * For AArch32 state BL1 and BL2U share the MMU setup.
48 * Given that BL2U does not map BL1 regions, MMU needs
49 * to be disabled in order to go back to BL1.
50 */
51 disable_mmu_icache_secure();
52 #endif /* AARCH32 */
53
54 /*
55 * Indicate that BL2U is done and resume back to
56 * normal world via an SMC to BL1.
57 * x1 could be passed to Normal world,
58 * so DO NOT pass any secret information.
59 */
60 smc(FWU_SMC_SEC_IMAGE_DONE, 0, 0, 0, 0, 0, 0, 0);
61 wfi();
62 }
63