arch/arm/cpu/armv7/omap3/boot.c

   1 /*
   2  * OMAP3 boot
   3  *
   4  * Copyright (C) 2015 Paul Kocialkowski <contact@paulk.fr>
   5  *
   6  * SPDX-License-Identifier:     GPL-2.0+
   7  */
   8
   9 #include <common.h>
  10 #include <asm/io.h>
  11 #include <asm/arch/sys_proto.h>
  12 #include <spl.h>
  13
  14 static u32 boot_devices[] = {
  15         BOOT_DEVICE_ONENAND,
  16         BOOT_DEVICE_NAND,
  17         BOOT_DEVICE_ONENAND,
  18         BOOT_DEVICE_MMC2,
  19         BOOT_DEVICE_ONENAND,
  20         BOOT_DEVICE_MMC2,
  21         BOOT_DEVICE_MMC1,
  22         BOOT_DEVICE_XIP,
  23         BOOT_DEVICE_XIPWAIT,
  24         BOOT_DEVICE_MMC2,
  25         BOOT_DEVICE_XIP,
  26         BOOT_DEVICE_XIPWAIT,
  27         BOOT_DEVICE_NAND,
  28         BOOT_DEVICE_XIP,
  29         BOOT_DEVICE_XIPWAIT,
  30         BOOT_DEVICE_NAND,
  31         BOOT_DEVICE_ONENAND,
  32         BOOT_DEVICE_MMC2,
  33         BOOT_DEVICE_MMC1,
  34         BOOT_DEVICE_XIP,
  35         BOOT_DEVICE_XIPWAIT,
  36         BOOT_DEVICE_NAND,
  37         BOOT_DEVICE_ONENAND,
  38         BOOT_DEVICE_MMC2,
  39         BOOT_DEVICE_MMC1,
  40         BOOT_DEVICE_XIP,
  41         BOOT_DEVICE_XIPWAIT,
  42         BOOT_DEVICE_NAND,
  43         BOOT_DEVICE_MMC2_2,
  44 };
  45
  46 u32 omap_sys_boot_device(void)
  47 {
  48         struct ctrl *ctrl_base = (struct ctrl *)OMAP34XX_CTRL_BASE;
  49         u32 sys_boot;
  50
  51         /* Grab the first 5 bits of the status register for SYS_BOOT. */
  52         sys_boot = readl(&ctrl_base->status) & ((1 << 5) - 1);
  53
  54         if (sys_boot >= (sizeof(boot_devices) / sizeof(u32)))
  55                 return BOOT_DEVICE_NONE;
  56
  57         return boot_devices[sys_boot];
  58 }