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 <hang.h>
  13 #include <image.h>
  14 #include <init.h>
  15 #include <asm/io.h>
  16 #include <asm/sections.h>
  17 #include <mach/jz4780.h>
  18 #include <mach/jz4780_dram.h>
  19 #include <mmc.h>
  20 #include <spl.h>
  21
  22 #ifdef CONFIG_SPL_BUILD
  23 /* Pointer to the global data structure for SPL */
  24 DECLARE_GLOBAL_DATA_PTR;
  25 gd_t gdata __attribute__ ((section(".bss")));
  26
  27 void board_init_f(ulong dummy)
  28 {
  29         typedef void __noreturn (*image_entry_noargs_t)(void);
  30         struct mmc *mmc;
  31         unsigned long count;
  32         struct image_header *header;
  33         int ret;
  34
  35         /* Set global data pointer */
  36         gd = &gdata;
  37
  38         timer_init();
  39         pll_init();
  40         sdram_init();
  41         enable_caches();
  42
  43         /* Clear the BSS */
  44         memset(__bss_start, 0, (char *)&__bss_end - __bss_start);
  45
  46         gd->flags |= GD_FLG_SPL_INIT;
  47
  48         ret = mmc_initialize(NULL);
  49         if (ret)
  50                 hang();
  51
  52         mmc = find_mmc_device(BOOT_DEVICE_MMC1);
  53         if (ret)
  54                 hang();
  55
  56         ret = mmc_init(mmc);
  57         if (ret)
  58                 hang();
  59
  60         header = (struct image_header *)(CONFIG_SYS_TEXT_BASE -
  61                                          sizeof(struct image_header));
  62
  63         count = blk_dread(mmc_get_blk_desc(mmc),
  64                           CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR,
  65                 0x800, header);
  66         if (count == 0)
  67                 hang();
  68
  69         image_entry_noargs_t image_entry =
  70                 (image_entry_noargs_t)CONFIG_SYS_TEXT_BASE;
  71
  72         image_entry();
  73
  74         hang();
  75 }
  76 #endif /* CONFIG_SPL_BUILD */
  77
  78 ulong board_get_usable_ram_top(ulong total_size)
  79 {
  80         return CONFIG_SYS_SDRAM_BASE + (256 * 1024 * 1024);
  81 }
  82
  83 int print_cpuinfo(void)
  84 {
  85         printf("CPU:   Ingenic JZ4780\n");
  86         return 0;
  87 }