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