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_NAND
  18 #undef CONFIG_ENV_IS_IN_MMC
  19 #undef CONFIG_ENV_IS_IN_SPI_FLASH
  20 #undef CONFIG_ENV_IS_IN_FLASH
  21
  22 #define CONFIG_ENV_IS_NOWHERE
  23
  24 #endif
  25
  26 #ifdef CONFIG_CHAIN_OF_TRUST
  27
  28 #ifndef CONFIG_EXTRA_ENV
  29 #define CONFIG_EXTRA_ENV        ""
  30 #endif
  31
  32 /*
  33  * Control should not reach back to uboot after validation of images
  34  * for secure boot flow and therefore bootscript should have
  35  * the bootm command. If control reaches back to uboot anyhow
  36  * after validating images, core should just spin.
  37  */
  38
  39 /*
  40  * Define the key hash for boot script here if public/private key pair used to
  41  * sign bootscript are different from the SRK hash put in the fuse
  42  * Example of defining KEY_HASH is
  43  * #define CONFIG_BOOTSCRIPT_KEY_HASH \
  44  *       "41066b564c6ffcef40ccbc1e0a5d0d519604000c785d97bbefd25e4d288d1c8b"
  45  */
  46
  47 #ifdef CONFIG_BOOTSCRIPT_KEY_HASH
  48 #define CONFIG_SECBOOT \
  49         "setenv bs_hdraddr " __stringify(CONFIG_BOOTSCRIPT_HDR_ADDR)";" \
  50         "setenv bootargs \'root=/dev/ram rw console=ttyS0,115200 "      \
  51         "ramdisk_size=600000\';"        \
  52         CONFIG_EXTRA_ENV        \
  53         "esbc_validate $bs_hdraddr " \
  54           __stringify(CONFIG_BOOTSCRIPT_KEY_HASH)";" \
  55         "source $img_addr;"     \
  56         "esbc_halt\0"
  57 #else
  58 #define CONFIG_SECBOOT \
  59         "setenv bs_hdraddr " __stringify(CONFIG_BOOTSCRIPT_HDR_ADDR)";" \
  60         "setenv bootargs \'root=/dev/ram rw console=ttyS0,115200 "      \
  61         "ramdisk_size=600000\';"        \
  62         CONFIG_EXTRA_ENV        \
  63         "esbc_validate $bs_hdraddr;" \
  64         "source $img_addr;"     \
  65         "esbc_halt\0"
  66 #endif
  67
  68 /* For secure boot flow, default environment used will be used */
  69 #if defined(CONFIG_SYS_RAMBOOT)
  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_flash " __stringify(CONFIG_BS_HDR_ADDR_FLASH)";" \
  74         "setenv bs_hdr_size " __stringify(CONFIG_BS_HDR_SIZE)";" \
  75         "setenv bs_ram " __stringify(CONFIG_BS_ADDR_RAM)";" \
  76         "setenv bs_flash " __stringify(CONFIG_BS_ADDR_FLASH)";" \
  77         "setenv bs_size " __stringify(CONFIG_BS_SIZE)";"
  78
  79 #if defined(CONFIG_RAMBOOT_NAND)
  80 #define CONFIG_BS_COPY_CMD \
  81         "nand read $bs_hdr_ram $bs_hdr_flash $bs_hdr_size ;" \
  82         "nand read $bs_ram $bs_flash $bs_size ;"
  83 #endif /* CONFIG_RAMBOOT_NAND */
  84 #endif /* CONFIG_BOOTSCRIPT_COPY_RAM */
  85
  86 #endif
  87
  88 #ifndef CONFIG_BS_COPY_ENV
  89 #define CONFIG_BS_COPY_ENV
  90 #endif
  91
  92 #ifndef CONFIG_BS_COPY_CMD
  93 #define CONFIG_BS_COPY_CMD
  94 #endif
  95
  96 #define CONFIG_CHAIN_BOOT_CMD   CONFIG_BS_COPY_ENV \
  97                                 CONFIG_BS_COPY_CMD \
  98                                 CONFIG_SECBOOT
  99
 100 #endif
 101 #endif