plat/arm/common/arm_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 <arch_helpers.h>
   8 #include <arm_def.h>
   9 #include <assert.h>
  10 #include <bl_common.h>
  11 #include <generic_delay_timer.h>
  12 #include <plat_arm.h>
  13 #include <platform_def.h>
  14 #include <platform.h>
  15 #include <string.h>
  16
  17 /* Weak definitions may be overridden in specific ARM standard platform */
  18 #pragma weak bl2u_platform_setup
  19 #pragma weak bl2u_early_platform_setup
  20 #pragma weak bl2u_plat_arch_setup
  21
  22 #define MAP_BL2U_TOTAL          MAP_REGION_FLAT(                        \
  23                                         BL2U_BASE,                      \
  24                                         BL2U_LIMIT - BL2U_BASE,         \
  25                                         MT_MEMORY | MT_RW | MT_SECURE)
  26
  27 /*
  28  * Perform ARM standard platform setup for BL2U
  29  */
  30 void arm_bl2u_platform_setup(void)
  31 {
  32         /* Initialize the secure environment */
  33         plat_arm_security_setup();
  34 }
  35
  36 void bl2u_platform_setup(void)
  37 {
  38         arm_bl2u_platform_setup();
  39 }
  40
  41 void arm_bl2u_early_platform_setup(struct meminfo *mem_layout, void *plat_info)
  42 {
  43         /* Initialize the console to provide early debug support */
  44         arm_console_boot_init();
  45
  46         generic_delay_timer_init();
  47 }
  48
  49 /*******************************************************************************
  50  * BL1 can pass platform dependent information to BL2U in x1.
  51  * In case of ARM CSS platforms x1 contains SCP_BL2U image info.
  52  * In case of ARM FVP platforms x1 is not used.
  53  * In both cases, x0 contains the extents of the memory available to BL2U
  54  ******************************************************************************/
  55 void bl2u_early_platform_setup(struct meminfo *mem_layout, void *plat_info)
  56 {
  57         arm_bl2u_early_platform_setup(mem_layout, plat_info);
  58 }
  59
  60 /*******************************************************************************
  61  * Perform the very early platform specific architectural setup here. At the
  62  * moment this is only initializes the mmu in a quick and dirty way.
  63  * The memory that is used by BL2U is only mapped.
  64  ******************************************************************************/
  65 void arm_bl2u_plat_arch_setup(void)
  66 {
  67
  68 #if USE_COHERENT_MEM
  69         /* Ensure ARM platforms dont use coherent memory in BL2U */
  70         assert((BL_COHERENT_RAM_END - BL_COHERENT_RAM_BASE) == 0U);
  71 #endif
  72
  73         const mmap_region_t bl_regions[] = {
  74                 MAP_BL2U_TOTAL,
  75                 ARM_MAP_BL_CODE,
  76                 ARM_MAP_BL_RO_DATA,
  77                 {0}
  78         };
  79
  80         arm_setup_page_tables(bl_regions, plat_arm_get_mmap());
  81
  82 #ifdef AARCH32
  83         enable_mmu_secure(0);
  84 #else
  85         enable_mmu_el1(0);
  86 #endif
  87 }
  88
  89 void bl2u_plat_arch_setup(void)
  90 {
  91         arm_bl2u_plat_arch_setup();
  92 }