plat/arm/css/common/css_bl2u_setup.c

   1 /*
   2  * Copyright (c) 2015-2018, ARM Limited and Contributors. All rights reserved.
   3  *
   4  * SPDX-License-Identifier: BSD-3-Clause
   5  */
   6
   7 #include <common/bl_common.h>
   8 #include <common/debug.h>
   9 #include <plat/common/platform.h>
  10
  11 #include <plat_arm.h>
  12
  13 #include "../drivers/scp/css_scp.h"
  14
  15 /* Weak definition may be overridden in specific CSS based platform */
  16 #pragma weak bl2u_plat_handle_scp_bl2u
  17
  18 /* Data structure which holds the SCP_BL2U image info for BL2U */
  19 static image_info_t scp_bl2u_image_info;
  20
  21 /*******************************************************************************
  22  * BL1 can pass platform dependent information to BL2U in x1.
  23  * In case of ARM CSS platforms x1 contains SCP_BL2U image info.
  24  * In case of ARM FVP platforms x1 is not used.
  25  * In both cases, x0 contains the extents of the memory available to BL2U
  26  ******************************************************************************/
  27 void bl2u_early_platform_setup(meminfo_t *mem_layout, void *plat_info)
  28 {
  29         if (!plat_info)
  30                 panic();
  31
  32         arm_bl2u_early_platform_setup(mem_layout, plat_info);
  33
  34         scp_bl2u_image_info = *(image_info_t *)plat_info;
  35 }
  36
  37 /*******************************************************************************
  38  * Transfer SCP_BL2U from Trusted RAM using the SCP Download protocol.
  39  ******************************************************************************/
  40 int bl2u_plat_handle_scp_bl2u(void)
  41 {
  42         int ret;
  43
  44         INFO("BL2U: Initiating SCP_BL2U transfer to SCP\n");
  45
  46         ret = css_scp_boot_image_xfer((void *)scp_bl2u_image_info.image_base,
  47                 scp_bl2u_image_info.image_size);
  48
  49         if (ret == 0)
  50                 ret = css_scp_boot_ready();
  51
  52         if (ret == 0)
  53                 INFO("BL2U: SCP_BL2U transferred to SCP\n");
  54         else
  55                 ERROR("BL2U: SCP_BL2U transfer failure\n");
  56
  57         return ret;
  58 }