plat/arm/common/arm_bl2u_setup.c

   1 /*
   2  * Copyright (c) 2015-2016, ARM Limited and Contributors. All rights reserved.
   3  *
   4  * SPDX-License-Identifier: BSD-3-Clause
   5  */
   6
   7 #include <arch_helpers.h>
   8 #include <arm_def.h>
   9 #include <bl_common.h>
  10 #include <console.h>
  11 #include <platform_def.h>
  12 #include <plat_arm.h>
  13 #include <string.h>
  14
  15 /* Weak definitions may be overridden in specific ARM standard platform */
  16 #pragma weak bl2u_platform_setup
  17 #pragma weak bl2u_early_platform_setup
  18 #pragma weak bl2u_plat_arch_setup
  19
  20 /*
  21  * Perform ARM standard platform setup for BL2U
  22  */
  23 void arm_bl2u_platform_setup(void)
  24 {
  25         /* Initialize the secure environment */
  26         plat_arm_security_setup();
  27 }
  28
  29 void bl2u_platform_setup(void)
  30 {
  31         arm_bl2u_platform_setup();
  32 }
  33
  34 void arm_bl2u_early_platform_setup(meminfo_t *mem_layout, void *plat_info)
  35 {
  36         /* Initialize the console to provide early debug support */
  37         console_init(PLAT_ARM_BOOT_UART_BASE, PLAT_ARM_BOOT_UART_CLK_IN_HZ,
  38                         ARM_CONSOLE_BAUDRATE);
  39 }
  40
  41 /*******************************************************************************
  42  * BL1 can pass platform dependent information to BL2U in x1.
  43  * In case of ARM CSS platforms x1 contains SCP_BL2U image info.
  44  * In case of ARM FVP platforms x1 is not used.
  45  * In both cases, x0 contains the extents of the memory available to BL2U
  46  ******************************************************************************/
  47 void bl2u_early_platform_setup(meminfo_t *mem_layout, void *plat_info)
  48 {
  49         arm_bl2u_early_platform_setup(mem_layout, plat_info);
  50 }
  51
  52 /*******************************************************************************
  53  * Perform the very early platform specific architectural setup here. At the
  54  * moment this is only initializes the mmu in a quick and dirty way.
  55  * The memory that is used by BL2U is only mapped.
  56  ******************************************************************************/
  57 void arm_bl2u_plat_arch_setup(void)
  58 {
  59         arm_setup_page_tables(BL2U_BASE,
  60                               BL31_LIMIT,
  61                               BL_CODE_BASE,
  62                               BL_CODE_END,
  63                               BL_RO_DATA_BASE,
  64                               BL_RO_DATA_END
  65 #if USE_COHERENT_MEM
  66                               ,
  67                               BL_COHERENT_RAM_BASE,
  68                               BL_COHERENT_RAM_END
  69 #endif
  70                 );
  71 #ifdef AARCH32
  72         enable_mmu_secure(0);
  73 #else
  74         enable_mmu_el1(0);
  75 #endif
  76 }
  77
  78 void bl2u_plat_arch_setup(void)
  79 {
  80         arm_bl2u_plat_arch_setup();
  81 }