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 <assert.h>
   8 #include <string.h>
   9
  10 #include <platform_def.h>
  11
  12 #include <arch_helpers.h>
  13 #include <common/bl_common.h>
  14 #include <drivers/generic_delay_timer.h>
  15 #include <plat/common/platform.h>
  16
  17 #include <arm_def.h>
  18 #include <plat_arm.h>
  19
  20 /* Weak definitions may be overridden in specific ARM standard platform */
  21 #pragma weak bl2u_platform_setup
  22 #pragma weak bl2u_early_platform_setup
  23 #pragma weak bl2u_plat_arch_setup
  24
  25 #define MAP_BL2U_TOTAL          MAP_REGION_FLAT(                        \
  26                                         BL2U_BASE,                      \
  27                                         BL2U_LIMIT - BL2U_BASE,         \
  28                                         MT_MEMORY | MT_RW | MT_SECURE)
  29
  30 /*
  31  * Perform ARM standard platform setup for BL2U
  32  */
  33 void arm_bl2u_platform_setup(void)
  34 {
  35         /* Initialize the secure environment */
  36         plat_arm_security_setup();
  37 }
  38
  39 void bl2u_platform_setup(void)
  40 {
  41         arm_bl2u_platform_setup();
  42 }
  43
  44 void arm_bl2u_early_platform_setup(struct meminfo *mem_layout, void *plat_info)
  45 {
  46         /* Initialize the console to provide early debug support */
  47         arm_console_boot_init();
  48
  49         generic_delay_timer_init();
  50 }
  51
  52 /*******************************************************************************
  53  * BL1 can pass platform dependent information to BL2U in x1.
  54  * In case of ARM CSS platforms x1 contains SCP_BL2U image info.
  55  * In case of ARM FVP platforms x1 is not used.
  56  * In both cases, x0 contains the extents of the memory available to BL2U
  57  ******************************************************************************/
  58 void bl2u_early_platform_setup(struct meminfo *mem_layout, void *plat_info)
  59 {
  60         arm_bl2u_early_platform_setup(mem_layout, plat_info);
  61 }
  62
  63 /*******************************************************************************
  64  * Perform the very early platform specific architectural setup here. At the
  65  * moment this is only initializes the mmu in a quick and dirty way.
  66  * The memory that is used by BL2U is only mapped.
  67  ******************************************************************************/
  68 void arm_bl2u_plat_arch_setup(void)
  69 {
  70
  71 #if USE_COHERENT_MEM
  72         /* Ensure ARM platforms dont use coherent memory in BL2U */
  73         assert((BL_COHERENT_RAM_END - BL_COHERENT_RAM_BASE) == 0U);
  74 #endif
  75
  76         const mmap_region_t bl_regions[] = {
  77                 MAP_BL2U_TOTAL,
  78                 ARM_MAP_BL_RO,
  79 #if USE_ROMLIB
  80                 ARM_MAP_ROMLIB_CODE,
  81                 ARM_MAP_ROMLIB_DATA,
  82 #endif
  83                 {0}
  84         };
  85
  86         setup_page_tables(bl_regions, plat_arm_get_mmap());
  87
  88 #ifdef AARCH32
  89         enable_mmu_svc_mon(0);
  90 #else
  91         enable_mmu_el1(0);
  92 #endif
  93         arm_setup_romlib();
  94 }
  95
  96 void bl2u_plat_arch_setup(void)
  97 {
  98         arm_bl2u_plat_arch_setup();
  99 }