arch/mips/mach-jz47xx/jz4780/jz4780.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * JZ4780 common routines
   4  *
   5  * Copyright (c) 2013 Imagination Technologies
   6  * Author: Paul Burton <paul.burton@imgtec.com>
   7  */
   8
   9 #include <config.h>
  10 #include <common.h>
  11 #include <cpu_func.h>
  12 #include <asm/io.h>
  13 #include <asm/sections.h>
  14 #include <mach/jz4780.h>
  15 #include <mach/jz4780_dram.h>
  16 #include <mmc.h>
  17 #include <spl.h>
  18
  19 #ifdef CONFIG_SPL_BUILD
  20 /* Pointer to the global data structure for SPL */
  21 DECLARE_GLOBAL_DATA_PTR;
  22 gd_t gdata __attribute__ ((section(".bss")));
  23
  24 void board_init_f(ulong dummy)
  25 {
  26         typedef void __noreturn (*image_entry_noargs_t)(void);
  27         struct mmc *mmc;
  28         unsigned long count;
  29         struct image_header *header;
  30         int ret;
  31
  32         /* Set global data pointer */
  33         gd = &gdata;
  34
  35         timer_init();
  36         pll_init();
  37         sdram_init();
  38         enable_caches();
  39
  40         /* Clear the BSS */
  41         memset(__bss_start, 0, (char *)&__bss_end - __bss_start);
  42
  43         gd->flags |= GD_FLG_SPL_INIT;
  44
  45         ret = mmc_initialize(NULL);
  46         if (ret)
  47                 hang();
  48
  49         mmc = find_mmc_device(BOOT_DEVICE_MMC1);
  50         if (ret)
  51                 hang();
  52
  53         ret = mmc_init(mmc);
  54         if (ret)
  55                 hang();
  56
  57         header = (struct image_header *)(CONFIG_SYS_TEXT_BASE -
  58                                          sizeof(struct image_header));
  59
  60         count = blk_dread(mmc_get_blk_desc(mmc),
  61                           CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR,
  62                 0x800, header);
  63         if (count == 0)
  64                 hang();
  65
  66         image_entry_noargs_t image_entry =
  67                 (image_entry_noargs_t)CONFIG_SYS_TEXT_BASE;
  68
  69         image_entry();
  70
  71         hang();
  72 }
  73 #endif /* CONFIG_SPL_BUILD */
  74
  75 ulong board_get_usable_ram_top(ulong total_size)
  76 {
  77         return CONFIG_SYS_SDRAM_BASE + (256 * 1024 * 1024);
  78 }
  79
  80 int print_cpuinfo(void)
  81 {
  82         printf("CPU:   Ingenic JZ4780\n");
  83         return 0;
  84 }