board/xilinx/microblaze-generic/microblaze-generic.c

   1 /*
   2  * (C) Copyright 2007 Michal Simek
   3  *
   4  * Michal  SIMEK <monstr@monstr.eu>
   5  *
   6  * SPDX-License-Identifier:     GPL-2.0+
   7  */
   8
   9 /* This is a board specific file.  It's OK to include board specific
  10  * header files */
  11
  12 #include <common.h>
  13 #include <config.h>
  14 #include <fdtdec.h>
  15 #include <asm/processor.h>
  16 #include <asm/microblaze_intc.h>
  17 #include <asm/asm.h>
  18 #include <asm/gpio.h>
  19
  20 DECLARE_GLOBAL_DATA_PTR;
  21
  22 #ifdef CONFIG_XILINX_GPIO
  23 static int reset_pin = -1;
  24 #endif
  25
  26 ulong ram_base;
  27
  28 int dram_init_banksize(void)
  29 {
  30         gd->bd->bi_dram[0].start = ram_base;
  31         gd->bd->bi_dram[0].size = get_effective_memsize();
  32
  33         return 0;
  34 }
  35
  36 int dram_init(void)
  37 {
  38         int node;
  39         fdt_addr_t addr;
  40         fdt_size_t size;
  41         const void *blob = gd->fdt_blob;
  42
  43         node = fdt_node_offset_by_prop_value(blob, -1, "device_type",
  44                                              "memory", 7);
  45         if (node == -FDT_ERR_NOTFOUND) {
  46                 debug("DRAM: Can't get memory node\n");
  47                 return 1;
  48         }
  49         addr = fdtdec_get_addr_size(blob, node, "reg", &size);
  50         if (addr == FDT_ADDR_T_NONE || size == 0) {
  51                 debug("DRAM: Can't get base address or size\n");
  52                 return 1;
  53         }
  54         ram_base = addr;
  55
  56         gd->ram_top = addr; /* In setup_dest_addr() is done +ram_size */
  57         gd->ram_size = size;
  58
  59         return 0;
  60 };
  61
  62 int do_reset(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
  63 {
  64 #ifndef CONFIG_SPL_BUILD
  65 #ifdef CONFIG_XILINX_GPIO
  66         if (reset_pin != -1)
  67                 gpio_direction_output(reset_pin, 1);
  68 #endif
  69
  70 #ifdef CONFIG_XILINX_TB_WATCHDOG
  71         hw_watchdog_disable();
  72 #endif
  73 #endif
  74         puts ("Reseting board\n");
  75         __asm__ __volatile__ (" mts rmsr, r0;" \
  76                                 "bra r0");
  77
  78         return 0;
  79 }
  80
  81 static int gpio_init(void)
  82 {
  83 #ifdef CONFIG_XILINX_GPIO
  84         reset_pin = gpio_alloc(CONFIG_SYS_GPIO_0_ADDR, "reset", 1);
  85         if (reset_pin != -1)
  86                 gpio_request(reset_pin, "reset_pin");
  87 #endif
  88         return 0;
  89 }
  90
  91 int board_late_init(void)
  92 {
  93         gpio_init();
  94
  95         return 0;
  96 }