include/config_fsl_chain_trust.h

   1 /*
   2  * Copyright 2015 Freescale Semiconductor, Inc.
   3  *
   4  * SPDX-License-Identifier:     GPL-2.0+
   5  */
   6
   7 #ifndef __CONFIG_FSL_CHAIN_TRUST_H
   8 #define __CONFIG_FSL_CHAIN_TRUST_H
   9
  10 /* For secure boot, since ENVIRONMENT in flash/external memories is
  11  * not verified, undef CONFIG_ENV_xxx and set default env
  12  * (CONFIG_ENV_IS_NOWHERE)
  13  */
  14 #ifdef CONFIG_SECURE_BOOT
  15
  16 #undef CONFIG_ENV_IS_IN_EEPROM
  17 #undef CONFIG_ENV_IS_IN_SPI_FLASH
  18 #undef CONFIG_ENV_IS_IN_FLASH
  19
  20 #endif
  21
  22 #ifdef CONFIG_CHAIN_OF_TRUST
  23
  24 #ifndef CONFIG_EXTRA_ENV
  25 #define CONFIG_EXTRA_ENV        ""
  26 #endif
  27
  28 /*
  29  * Control should not reach back to uboot after validation of images
  30  * for secure boot flow and therefore bootscript should have
  31  * the bootm command. If control reaches back to uboot anyhow
  32  * after validating images, core should just spin.
  33  */
  34
  35 /*
  36  * Define the key hash for boot script here if public/private key pair used to
  37  * sign bootscript are different from the SRK hash put in the fuse
  38  * Example of defining KEY_HASH is
  39  * #define CONFIG_BOOTSCRIPT_KEY_HASH \
  40  *       "41066b564c6ffcef40ccbc1e0a5d0d519604000c785d97bbefd25e4d288d1c8b"
  41  */
  42
  43 #ifdef CONFIG_BOOTARGS
  44 #define CONFIG_SET_BOOTARGS     "setenv bootargs \'" CONFIG_BOOTARGS" \';"
  45 #else
  46 #define CONFIG_SET_BOOTARGS     "setenv bootargs \'root=/dev/ram "      \
  47                                 "rw console=ttyS0,115200 ramdisk_size=600000\';"
  48 #endif
  49
  50
  51 #ifdef CONFIG_BOOTSCRIPT_KEY_HASH
  52 #define CONFIG_SECBOOT \
  53         "setenv bs_hdraddr " __stringify(CONFIG_BOOTSCRIPT_HDR_ADDR)";" \
  54         CONFIG_SET_BOOTARGS     \
  55         CONFIG_EXTRA_ENV        \
  56         "esbc_validate $bs_hdraddr " \
  57           __stringify(CONFIG_BOOTSCRIPT_KEY_HASH)";" \
  58         "source $img_addr;"     \
  59         "esbc_halt\0"
  60 #else
  61 #define CONFIG_SECBOOT \
  62         "setenv bs_hdraddr " __stringify(CONFIG_BOOTSCRIPT_HDR_ADDR)";" \
  63         CONFIG_SET_BOOTARGS     \
  64         CONFIG_EXTRA_ENV        \
  65         "esbc_validate $bs_hdraddr;" \
  66         "source $img_addr;"     \
  67         "esbc_halt\0"
  68 #endif
  69
  70 #ifdef CONFIG_BOOTSCRIPT_COPY_RAM
  71 #define CONFIG_BS_COPY_ENV \
  72         "setenv bs_hdr_ram " __stringify(CONFIG_BS_HDR_ADDR_RAM)";" \
  73         "setenv bs_hdr_device " __stringify(CONFIG_BS_HDR_ADDR_DEVICE)";" \
  74         "setenv bs_hdr_size " __stringify(CONFIG_BS_HDR_SIZE)";" \
  75         "setenv bs_ram " __stringify(CONFIG_BS_ADDR_RAM)";" \
  76         "setenv bs_device " __stringify(CONFIG_BS_ADDR_DEVICE)";" \
  77         "setenv bs_size " __stringify(CONFIG_BS_SIZE)";"
  78
  79 /* For secure boot flow, default environment used will be used */
  80 #if defined(CONFIG_SYS_RAMBOOT) || defined(CONFIG_NAND_BOOT) || \
  81         defined(CONFIG_SD_BOOT)
  82 #if defined(CONFIG_RAMBOOT_NAND) || defined(CONFIG_NAND_BOOT)
  83 #define CONFIG_BS_COPY_CMD \
  84         "nand read $bs_hdr_ram $bs_hdr_device $bs_hdr_size ;" \
  85         "nand read $bs_ram $bs_device $bs_size ;"
  86 #elif defined(CONFIG_SD_BOOT)
  87 #define CONFIG_BS_COPY_CMD \
  88         "mmc read $bs_hdr_ram $bs_hdr_device $bs_hdr_size ;" \
  89         "mmc read $bs_ram $bs_device $bs_size ;"
  90 #endif
  91 #else
  92 #define CONFIG_BS_COPY_CMD \
  93         "cp.b $bs_hdr_device $bs_hdr_ram  $bs_hdr_size ;" \
  94         "cp.b $bs_device $bs_ram  $bs_size ;"
  95 #endif
  96 #endif /* CONFIG_BOOTSCRIPT_COPY_RAM */
  97
  98 #ifndef CONFIG_BS_COPY_ENV
  99 #define CONFIG_BS_COPY_ENV
 100 #endif
 101
 102 #ifndef CONFIG_BS_COPY_CMD
 103 #define CONFIG_BS_COPY_CMD
 104 #endif
 105
 106 #define CONFIG_CHAIN_BOOT_CMD   CONFIG_BS_COPY_ENV \
 107                                 CONFIG_BS_COPY_CMD \
 108                                 CONFIG_SECBOOT
 109
 110 #endif
 111 #endif