arch/arm/mach-imx/spl.c

   1 /*
   2  * Copyright (C) 2014 Gateworks Corporation
   3  * Copyright (C) 2011-2012 Freescale Semiconductor, Inc.
   4  *
   5  * Author: Tim Harvey <tharvey@gateworks.com>
   6  *
   7  * SPDX-License-Identifier:     GPL-2.0+
   8  */
   9
  10 #include <common.h>
  11 #include <asm/io.h>
  12 #include <asm/arch/imx-regs.h>
  13 #include <asm/arch/sys_proto.h>
  14 #include <asm/spl.h>
  15 #include <spl.h>
  16 #include <asm/mach-imx/hab.h>
  17
  18 #if defined(CONFIG_MX6)
  19 /* determine boot device from SRC_SBMR1 (BOOT_CFG[4:1]) or SRC_GPR9 register */
  20 u32 spl_boot_device(void)
  21 {
  22         unsigned int bmode = readl(&src_base->sbmr2);
  23         u32 reg = imx6_src_get_boot_mode();
  24
  25         /*
  26          * Check for BMODE if serial downloader is enabled
  27          * BOOT_MODE - see IMX6DQRM Table 8-1
  28          */
  29         if (((bmode >> 24) & 0x03) == 0x01) /* Serial Downloader */
  30                 return BOOT_DEVICE_BOARD;
  31
  32         /* BOOT_CFG1[7:4] - see IMX6DQRM Table 8-8 */
  33         switch ((reg & IMX6_BMODE_MASK) >> IMX6_BMODE_SHIFT) {
  34          /* EIM: See 8.5.1, Table 8-9 */
  35         case IMX6_BMODE_EMI:
  36                 /* BOOT_CFG1[3]: NOR/OneNAND Selection */
  37                 switch ((reg & IMX6_BMODE_EMI_MASK) >> IMX6_BMODE_EMI_SHIFT) {
  38                 case IMX6_BMODE_ONENAND:
  39                         return BOOT_DEVICE_ONENAND;
  40                 case IMX6_BMODE_NOR:
  41                         return BOOT_DEVICE_NOR;
  42                 break;
  43                 }
  44         /* Reserved: Used to force Serial Downloader */
  45         case IMX6_BMODE_RESERVED:
  46                 return BOOT_DEVICE_BOARD;
  47         /* SATA: See 8.5.4, Table 8-20 */
  48         case IMX6_BMODE_SATA:
  49                 return BOOT_DEVICE_SATA;
  50         /* Serial ROM: See 8.5.5.1, Table 8-22 */
  51         case IMX6_BMODE_SERIAL_ROM:
  52                 /* BOOT_CFG4[2:0] */
  53                 switch ((reg & IMX6_BMODE_SERIAL_ROM_MASK) >>
  54                         IMX6_BMODE_SERIAL_ROM_SHIFT) {
  55                 case IMX6_BMODE_ECSPI1:
  56                 case IMX6_BMODE_ECSPI2:
  57                 case IMX6_BMODE_ECSPI3:
  58                 case IMX6_BMODE_ECSPI4:
  59                 case IMX6_BMODE_ECSPI5:
  60                         return BOOT_DEVICE_SPI;
  61                 case IMX6_BMODE_I2C1:
  62                 case IMX6_BMODE_I2C2:
  63                 case IMX6_BMODE_I2C3:
  64                         return BOOT_DEVICE_I2C;
  65                 }
  66                 break;
  67         /* SD/eSD: 8.5.3, Table 8-15  */
  68         case IMX6_BMODE_SD:
  69         case IMX6_BMODE_ESD:
  70                 return BOOT_DEVICE_MMC1;
  71         /* MMC/eMMC: 8.5.3 */
  72         case IMX6_BMODE_MMC:
  73         case IMX6_BMODE_EMMC:
  74                 return BOOT_DEVICE_MMC1;
  75         /* NAND Flash: 8.5.2, Table 8-10 */
  76         case IMX6_BMODE_NAND:
  77                 return BOOT_DEVICE_NAND;
  78         }
  79         return BOOT_DEVICE_NONE;
  80 }
  81 #endif
  82
  83 #if defined(CONFIG_SPL_MMC_SUPPORT)
  84 /* called from spl_mmc to see type of boot mode for storage (RAW or FAT) */
  85 u32 spl_boot_mode(const u32 boot_device)
  86 {
  87         switch (spl_boot_device()) {
  88         /* for MMC return either RAW or FAT mode */
  89         case BOOT_DEVICE_MMC1:
  90         case BOOT_DEVICE_MMC2:
  91 #if defined(CONFIG_SPL_FAT_SUPPORT)
  92                 return MMCSD_MODE_FS;
  93 #elif defined(CONFIG_SUPPORT_EMMC_BOOT)
  94                 return MMCSD_MODE_EMMCBOOT;
  95 #else
  96                 return MMCSD_MODE_RAW;
  97 #endif
  98                 break;
  99         default:
 100                 puts("spl: ERROR:  unsupported device\n");
 101                 hang();
 102         }
 103 }
 104 #endif
 105
 106 #if defined(CONFIG_SECURE_BOOT)
 107
 108 __weak void __noreturn jump_to_image_no_args(struct spl_image_info *spl_image)
 109 {
 110         typedef void __noreturn (*image_entry_noargs_t)(void);
 111
 112         image_entry_noargs_t image_entry =
 113                 (image_entry_noargs_t)(unsigned long)spl_image->entry_point;
 114
 115         debug("image entry point: 0x%lX\n", spl_image->entry_point);
 116
 117         /* HAB looks for the CSF at the end of the authenticated data therefore,
 118          * we need to subtract the size of the CSF from the actual filesize */
 119         if (authenticate_image(spl_image->load_addr,
 120                                spl_image->size - CONFIG_CSF_SIZE)) {
 121                 image_entry();
 122         } else {
 123                 puts("spl: ERROR:  image authentication unsuccessful\n");
 124                 hang();
 125         }
 126 }
 127
 128 #endif