LXR uboot/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
  20DECLARE_GLOBAL_DATA_PTR;
  21
  22#ifdef CONFIG_XILINX_GPIO
  23static int reset_pin = -1;
  24#endif
  25
  26ulong ram_base;
  27
  28void 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
  34int dram_init(void)
  35{
  36        int node;
  37        fdt_addr_t addr;
  38        fdt_size_t size;
  39        const void *blob = gd->fdt_blob;
  40
  41        node = fdt_node_offset_by_prop_value(blob, -1, "device_type",
  42                                             "memory", 7);
  43        if (node == -FDT_ERR_NOTFOUND) {
  44                debug("DRAM: Can't get memory node\n");
  45                return 1;
  46        }
  47        addr = fdtdec_get_addr_size(blob, node, "reg", &size);
  48        if (addr == FDT_ADDR_T_NONE || size == 0) {
  49                debug("DRAM: Can't get base address or size\n");
  50                return 1;
  51        }
  52        ram_base = addr;
  53
  54        gd->ram_top = addr; /* In setup_dest_addr() is done +ram_size */
  55        gd->ram_size = size;
  56
  57        return 0;
  58};
  59
  60int do_reset(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
  61{
  62#ifndef CONFIG_SPL_BUILD
  63#ifdef CONFIG_XILINX_GPIO
  64        if (reset_pin != -1)
  65                gpio_direction_output(reset_pin, 1);
  66#endif
  67
  68#ifdef CONFIG_XILINX_TB_WATCHDOG
  69        hw_watchdog_disable();
  70#endif
  71#endif
  72        puts ("Reseting board\n");
  73        __asm__ __volatile__ (" mts rmsr, r0;" \
  74                                "bra r0");
  75
  76        return 0;
  77}
  78
  79static int gpio_init(void)
  80{
  81#ifdef CONFIG_XILINX_GPIO
  82        reset_pin = gpio_alloc(CONFIG_SYS_GPIO_0_ADDR, "reset", 1);
  83        if (reset_pin != -1)
  84                gpio_request(reset_pin, "reset_pin");
  85#endif
  86        return 0;
  87}
  88
  89int board_late_init(void)
  90{
  91        gpio_init();
  92
  93        return 0;
  94}
  95