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      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 <plat_arm.h>
     12 #include <platform_def.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 }
     82