1 /* 2 * Copyright 2015 Freescale Semiconductor, Inc. 3 * 4 * SPDX-License-Identifier: GPL-2.0+ 5 */ 6 7 #include <common.h> 8 #include <dm.h> 9 #include <fsl_validate.h> 10 #include <fsl_secboot_err.h> 11 #include <fsl_sfp.h> 12 #include <dm/root.h> 13 14 #if defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_FRAMEWORK) 15 #include <spl.h> 16 #endif 17 18 #ifdef CONFIG_ADDR_MAP 19 #include <asm/mmu.h> 20 #endif 21 22 #ifdef CONFIG_FSL_CORENET 23 #include <asm/fsl_pamu.h> 24 #endif 25 26 #ifdef CONFIG_ARCH_LS1021A 27 #include <asm/arch/immap_ls102xa.h> 28 #endif 29 30 #if defined(CONFIG_MPC85xx) 31 #define CONFIG_DCFG_ADDR CONFIG_SYS_MPC85xx_GUTS_ADDR 32 #else 33 #define CONFIG_DCFG_ADDR CONFIG_SYS_FSL_GUTS_ADDR 34 #endif 35 36 #ifdef CONFIG_SYS_FSL_CCSR_GUR_LE 37 #define gur_in32(a) in_le32(a) 38 #else 39 #define gur_in32(a) in_be32(a) 40 #endif 41 42 /* Check the Boot Mode. If Secure, return 1 else return 0 */ 43 int fsl_check_boot_mode_secure(void) 44 { 45 uint32_t val; 46 struct ccsr_sfp_regs *sfp_regs = (void *)(CONFIG_SYS_SFP_ADDR); 47 struct ccsr_gur __iomem *gur = (void *)(CONFIG_DCFG_ADDR); 48 49 val = sfp_in32(&sfp_regs->ospr) & ITS_MASK; 50 if (val == ITS_MASK) 51 return 1; 52 53 #if defined(CONFIG_FSL_CORENET) || !defined(CONFIG_MPC85xx) 54 /* For PBL based platforms check the SB_EN bit in RCWSR */ 55 val = gur_in32(&gur->rcwsr[RCW_SB_EN_REG_INDEX - 1]) & RCW_SB_EN_MASK; 56 if (val == RCW_SB_EN_MASK) 57 return 1; 58 #endif 59 60 #if defined(CONFIG_MPC85xx) && !defined(CONFIG_FSL_CORENET) 61 /* For Non-PBL Platforms, check the Device Status register 2*/ 62 val = gur_in32(&gur->pordevsr2) & MPC85xx_PORDEVSR2_SBC_MASK; 63 if (val != MPC85xx_PORDEVSR2_SBC_MASK) 64 return 1; 65 66 #endif 67 return 0; 68 } 69 70 #ifndef CONFIG_SPL_BUILD 71 int fsl_setenv_chain_of_trust(void) 72 { 73 /* Check Boot Mode 74 * If Boot Mode is Non-Secure, no changes are required 75 */ 76 if (fsl_check_boot_mode_secure() == 0) 77 return 0; 78 79 /* If Boot mode is Secure, set the environment variables 80 * bootdelay = 0 (To disable Boot Prompt) 81 * bootcmd = CONFIG_CHAIN_BOOT_CMD (Validate and execute Boot script) 82 */ 83 setenv("bootdelay", "0"); 84 85 #ifdef CONFIG_ARM 86 setenv("secureboot", "y"); 87 #else 88 setenv("bootcmd", CONFIG_CHAIN_BOOT_CMD); 89 #endif 90 91 return 0; 92 } 93 #endif 94 95 #ifdef CONFIG_SPL_BUILD 96 void spl_validate_uboot(uint32_t hdr_addr, uintptr_t img_addr) 97 { 98 int res; 99 100 /* 101 * Check Boot Mode 102 * If Boot Mode is Non-Secure, skip validation 103 */ 104 if (fsl_check_boot_mode_secure() == 0) 105 return; 106 107 printf("SPL: Validating U-Boot image\n"); 108 109 #ifdef CONFIG_ADDR_MAP 110 init_addr_map(); 111 #endif 112 113 #ifdef CONFIG_FSL_CORENET 114 if (pamu_init() < 0) 115 fsl_secboot_handle_error(ERROR_ESBC_PAMU_INIT); 116 #endif 117 118 #ifdef CONFIG_FSL_CAAM 119 if (sec_init() < 0) 120 fsl_secboot_handle_error(ERROR_ESBC_SEC_INIT); 121 #endif 122 123 /* 124 * dm_init_and_scan() is called as part of common SPL framework, so no 125 * need to call it again but in case of powerpc platforms which currently 126 * do not use common SPL framework, so need to call this function here. 127 */ 128 #if defined(CONFIG_SPL_DM) && (!defined(CONFIG_SPL_FRAMEWORK)) 129 dm_init_and_scan(true); 130 #endif 131 res = fsl_secboot_validate(hdr_addr, CONFIG_SPL_UBOOT_KEY_HASH, 132 &img_addr); 133 134 if (res == 0) 135 printf("SPL: Validation of U-boot successful\n"); 136 } 137 138 #ifdef CONFIG_SPL_FRAMEWORK 139 /* Override weak funtion defined in SPL framework to enable validation 140 * of main u-boot image before jumping to u-boot image. 141 */ 142 void __noreturn jump_to_image_no_args(struct spl_image_info *spl_image) 143 { 144 typedef void __noreturn (*image_entry_noargs_t)(void); 145 uint32_t hdr_addr; 146 147 image_entry_noargs_t image_entry = 148 (image_entry_noargs_t)(unsigned long)spl_image->entry_point; 149 150 hdr_addr = (spl_image->entry_point + spl_image->size - 151 CONFIG_U_BOOT_HDR_SIZE); 152 spl_validate_uboot(hdr_addr, (uintptr_t)spl_image->entry_point); 153 /* 154 * In case of failure in validation, spl_validate_uboot would 155 * not return back in case of Production environment with ITS=1. 156 * Thus U-Boot will not start. 157 * In Development environment (ITS=0 and SB_EN=1), the function 158 * may return back in case of non-fatal failures. 159 */ 160 161 debug("image entry point: 0x%lX\n", spl_image->entry_point); 162 image_entry(); 163 } 164 #endif /* ifdef CONFIG_SPL_FRAMEWORK */ 165 #endif /* ifdef CONFIG_SPL_BUILD */ 166