board/armltd/vexpress64/vexpress64.c

   1 /*
   2  * (C) Copyright 2013
   3  * David Feng <fenghua@phytium.com.cn>
   4  * Sharma Bhupesh <bhupesh.sharma@freescale.com>
   5  *
   6  * SPDX-License-Identifier:     GPL-2.0+
   7  */
   8 #include <common.h>
   9 #include <malloc.h>
  10 #include <errno.h>
  11 #include <netdev.h>
  12 #include <asm/io.h>
  13 #include <linux/compiler.h>
  14 #include <asm/semihosting.h>
  15
  16 DECLARE_GLOBAL_DATA_PTR;
  17
  18 int board_init(void)
  19 {
  20         return 0;
  21 }
  22
  23 int dram_init(void)
  24 {
  25         gd->ram_size = PHYS_SDRAM_1_SIZE;
  26         return 0;
  27 }
  28
  29 /*
  30  * Board specific reset that is system reset.
  31  */
  32 void reset_cpu(ulong addr)
  33 {
  34 }
  35
  36 #ifdef CONFIG_BOARD_LATE_INIT
  37 int board_late_init(void)
  38 {
  39 #ifdef CONFIG_SEMIHOSTING
  40         /*
  41          * Please refer to doc/README.semihosting for a more complete
  42          * description.
  43          *
  44          * We require that the board include file defines these env variables:
  45          * - kernel_name
  46          * - kernel_addr_r
  47          * - initrd_name
  48          * - initrd_addr_r
  49          * - fdt_name
  50          * - fdt_addr_r
  51          *
  52          * For the "fdt chosen" startup macro, this code will then define:
  53          * - initrd_end (based on initrd_addr_r plus actual initrd_size)
  54          *
  55          * We will then load the kernel, initrd, and fdt into the specified
  56          * locations in memory in a similar way that the ATF fastmodel code
  57          * uses semihosting calls to load other boot stages and u-boot itself.
  58          */
  59
  60         /* Env variable strings */
  61         char *kernel_name = getenv("kernel_name");
  62         char *kernel_addr_str = getenv("kernel_addr_r");
  63         char *initrd_name = getenv("initrd_name");
  64         char *initrd_addr_str = getenv("initrd_addr_r");
  65         char *fdt_name = getenv("fdt_name");
  66         char *fdt_addr_str = getenv("fdt_addr_r");
  67         char initrd_end_str[64];
  68
  69         /* Actual addresses converted from env variables */
  70         void *kernel_addr_r;
  71         void *initrd_addr_r;
  72         void *fdt_addr_r;
  73
  74         /* Actual initrd base and size */
  75         unsigned long initrd_base;
  76         unsigned long initrd_size;
  77
  78         /* Space available */
  79         int avail;
  80
  81         /* Make sure the environment variables needed are set */
  82         if (!(kernel_addr_str && initrd_addr_str && fdt_addr_str)) {
  83                 printf("%s: Define {kernel/initrd/fdt}_addr_r\n", __func__);
  84                 return -1;
  85         }
  86         if (!(kernel_name && initrd_name && fdt_name)) {
  87                 printf("%s: Define {kernel/initrd/fdt}_name\n", __func__);
  88                 return -1;
  89         }
  90
  91         /* Get exact initrd_size */
  92         initrd_size = smh_len(initrd_name);
  93         if (initrd_size == -1) {
  94                 printf("%s: Can't get file size for \'%s\'\n", __func__,
  95                        initrd_name);
  96                 return -1;
  97         }
  98
  99         /* Set initrd_end */
 100         initrd_base = simple_strtoul(initrd_addr_str, NULL, 16);
 101         initrd_addr_r = (void *)initrd_base;
 102         sprintf(initrd_end_str, "0x%lx", initrd_base + initrd_size - 1);
 103         setenv("initrd_end", initrd_end_str);
 104
 105         /* Load kernel to memory */
 106         fdt_addr_r = (void *)simple_strtoul(fdt_addr_str, NULL, 16);
 107         kernel_addr_r = (void *)simple_strtoul(kernel_addr_str, NULL, 16);
 108
 109         /*
 110          * The kernel must be lower in memory than fdt and loading the
 111          * kernel must not trample the fdt or vice versa.
 112          */
 113         avail = fdt_addr_r - kernel_addr_r;
 114         if (avail < 0) {
 115                 printf("%s: fdt must be after kernel\n", __func__);
 116                 return -1;
 117         }
 118         smh_load(kernel_name, kernel_addr_r, avail, 1);
 119
 120         /* Load fdt to memory */
 121         smh_load(fdt_name, fdt_addr_r, 0x20000, 1);
 122
 123         /* Load initrd to memory */
 124         smh_load(initrd_name, initrd_addr_r, initrd_size, 1);
 125
 126 #endif                          /* CONFIG_SEMIHOSTING */
 127         return 0;
 128 }
 129 #endif                          /* CONFIG_BOARD_LATE_INIT */
 130
 131 /*
 132  * Board specific ethernet initialization routine.
 133  */
 134 int board_eth_init(bd_t *bis)
 135 {
 136         int rc = 0;
 137 #ifdef CONFIG_SMC91111
 138         rc = smc91111_initialize(0, CONFIG_SMC91111_BASE);
 139 #endif
 140 #ifdef CONFIG_SMC911X
 141         rc = smc911x_initialize(0, CONFIG_SMC911X_BASE);
 142 #endif
 143         return rc;
 144 }