LXR uboot/arch/powerpc/cpu/mpc5xxx/spl

   1/*
   2 * Copyright (C) 2012 Stefan Roese <sr@denx.de>
   3 *
   4 * SPDX-License-Identifier:     GPL-2.0+
   5 */
   6
   7#include <common.h>
   8#include <spl.h>
   9
  10DECLARE_GLOBAL_DATA_PTR;
  11
  12/*
  13 * Needed to align size SPL image to a 4-byte length
  14 */
  15u32 end_align __attribute__ ((section(".end_align")));
  16
  17/*
  18 * Return selected boot device. On MPC5200 its only NOR flash right now.
  19 */
  20u32 spl_boot_device(void)
  21{
  22        return BOOT_DEVICE_NOR;
  23}
  24
  25/*
  26 * SPL version of board_init_f()
  27 */
  28void board_init_f(ulong bootflag)
  29{
  30        end_align = (u32)__spl_flash_end;
  31
  32        /*
  33         * On MPC5200, the initial RAM (and gd) is located in the internal
  34         * SRAM. So we can actually call the preloader console init code
  35         * before calling initdram(). This makes serial output (printf)
  36         * available very early, even before SDRAM init, which has been
  37         * an U-Boot priciple from day 1.
  38         */
  39
  40        /*
  41         * Init global_data pointer. Has to be done before calling
  42         * get_clocks(), as it stores some clock values into gd needed
  43         * later on in the serial driver.
  44         */
  45        /* Pointer is writable since we allocated a register for it */
  46        gd = (gd_t *)(CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_GBL_DATA_OFFSET);
  47        /* Clear initial global data */
  48        memset((void *)gd, 0, sizeof(gd_t));
  49
  50        /*
  51         * get_clocks() needs to be called so that the serial driver
  52         * works correctly
  53         */
  54        get_clocks();
  55
  56        /*
  57         * Do rudimental console / serial setup
  58         */
  59        preloader_console_init();
  60
  61        /*
  62         * First we need to initialize the SDRAM, so that the real
  63         * U-Boot or the OS (Linux) can be loaded
  64         */
  65        initdram(0);
  66
  67        /* Clear bss */
  68        memset(__bss_start, '\0', __bss_end - __bss_start);
  69
  70        /*
  71         * Call board_init_r() (SPL framework version) to load and boot
  72         * real U-Boot or OS
  73         */
  74        board_init_r(NULL, 0);
  75        /* Does not return!!! */
  76}
  77