arch/arm/cpu/armv8/zynqmp/spl.c

   1 /*
   2  * Copyright 2015 - 2016 Xilinx, Inc.
   3  *
   4  * Michal Simek <michal.simek@xilinx.com>
   5  *
   6  * SPDX-License-Identifier:     GPL-2.0+
   7  */
   8
   9 #include <common.h>
  10 #include <debug_uart.h>
  11 #include <spl.h>
  12
  13 #include <asm/io.h>
  14 #include <asm/spl.h>
  15 #include <asm/arch/hardware.h>
  16 #include <asm/arch/sys_proto.h>
  17
  18 void board_init_f(ulong dummy)
  19 {
  20         psu_init();
  21         board_early_init_r();
  22
  23 #ifdef CONFIG_DEBUG_UART
  24         /* Uart debug for sure */
  25         debug_uart_init();
  26         puts("Debug uart enabled\n"); /* or printch() */
  27 #endif
  28         /* Delay is required for clocks to be propagated */
  29         udelay(1000000);
  30
  31         /* Clear the BSS */
  32         memset(__bss_start, 0, __bss_end - __bss_start);
  33
  34         /* No need to call timer init - it is empty for ZynqMP */
  35         board_init_r(NULL, 0);
  36 }
  37
  38 #ifdef CONFIG_SPL_BOARD_INIT
  39 void spl_board_init(void)
  40 {
  41         preloader_console_init();
  42         board_init();
  43 }
  44 #endif
  45
  46 u32 spl_boot_device(void)
  47 {
  48         u32 reg = 0;
  49         u8 bootmode;
  50
  51         reg = readl(&crlapb_base->boot_mode);
  52         bootmode = reg & BOOT_MODES_MASK;
  53
  54         switch (bootmode) {
  55         case JTAG_MODE:
  56                 return BOOT_DEVICE_RAM;
  57 #ifdef CONFIG_SPL_MMC_SUPPORT
  58         case EMMC_MODE:
  59         case SD_MODE:
  60         case SD_MODE1:
  61                 return BOOT_DEVICE_MMC1;
  62 #endif
  63         default:
  64                 printf("Invalid Boot Mode:0x%x\n", bootmode);
  65                 break;
  66         }
  67
  68         return 0;
  69 }
  70
  71 u32 spl_boot_mode(const u32 boot_device)
  72 {
  73         switch (spl_boot_device()) {
  74         case BOOT_DEVICE_RAM:
  75                 return 0;
  76         case BOOT_DEVICE_MMC1:
  77                 return MMCSD_MODE_FS;
  78         default:
  79                 puts("spl: error: unsupported device\n");
  80                 hang();
  81         }
  82 }
  83
  84 __weak void psu_init(void)
  85 {
  86          /*
  87           * This function is overridden by the one in
  88           * board/xilinx/zynqmp/(platform)/psu_init_gpl.c, if it exists.
  89           */
  90 }
  91
  92 #ifdef CONFIG_SPL_OS_BOOT
  93 int spl_start_uboot(void)
  94 {
  95         return 0;
  96 }
  97 #endif
  98
  99 #ifdef CONFIG_SPL_LOAD_FIT
 100 int board_fit_config_name_match(const char *name)
 101 {
 102         /* Just empty function now - can't decide what to choose */
 103         debug("%s: %s\n", __func__, name);
 104
 105         return 0;
 106 }
 107 #endif