bl2u/bl2u_main.c

   1 /*
   2  * Copyright (c) 2015-2017, ARM Limited and Contributors. All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions are met:
   6  *
   7  * Redistributions of source code must retain the above copyright notice, this
   8  * list of conditions and the following disclaimer.
   9  *
  10  * Redistributions in binary form must reproduce the above copyright notice,
  11  * this list of conditions and the following disclaimer in the documentation
  12  * and/or other materials provided with the distribution.
  13  *
  14  * Neither the name of ARM nor the names of its contributors may be used
  15  * to endorse or promote products derived from this software without specific
  16  * prior written permission.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  19  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  20  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  21  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
  22  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  23  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  24  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  25  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  26  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  27  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  28  * POSSIBILITY OF SUCH DAMAGE.
  29  */
  30
  31 #include <arch.h>
  32 #include <arch_helpers.h>
  33 #include <assert.h>
  34 #include <auth_mod.h>
  35 #include <bl_common.h>
  36 #include <bl1.h>
  37 #include <console.h>
  38 #include <debug.h>
  39 #include <platform.h>
  40 #include <platform_def.h>
  41 #include <stdint.h>
  42
  43 /*******************************************************************************
  44  * This function is responsible to:
  45  * Load SCP_BL2U if platform has defined SCP_BL2U_BASE
  46  * Perform platform setup.
  47  * Go back to EL3.
  48  ******************************************************************************/
  49 void bl2u_main(void)
  50 {
  51         NOTICE("BL2U: %s\n", version_string);
  52         NOTICE("BL2U: %s\n", build_message);
  53
  54 #if SCP_BL2U_BASE
  55         int rc;
  56         /* Load the subsequent bootloader images */
  57         rc = bl2u_plat_handle_scp_bl2u();
  58         if (rc) {
  59                 ERROR("Failed to load SCP_BL2U (%i)\n", rc);
  60                 panic();
  61         }
  62 #endif
  63
  64         /* Perform platform setup in BL2U after loading SCP_BL2U */
  65         bl2u_platform_setup();
  66
  67         console_flush();
  68
  69         /*
  70          * Indicate that BL2U is done and resume back to
  71          * normal world via an SMC to BL1.
  72          * x1 could be passed to Normal world,
  73          * so DO NOT pass any secret information.
  74          */
  75         smc(FWU_SMC_SEC_IMAGE_DONE, 0, 0, 0, 0, 0, 0, 0);
  76         wfi();
  77 }