arch/arm/mach-meson/board.c

   1 /*
   2  * (C) Copyright 2016 Beniamino Galvani <b.galvani@gmail.com>
   3  *
   4  * SPDX-License-Identifier:     GPL-2.0+
   5  */
   6
   7 #include <common.h>
   8 #include <libfdt.h>
   9 #include <linux/err.h>
  10 #include <asm/arch/gxbb.h>
  11 #include <asm/arch/sm.h>
  12 #include <asm/armv8/mmu.h>
  13 #include <asm/unaligned.h>
  14
  15 DECLARE_GLOBAL_DATA_PTR;
  16
  17 int dram_init(void)
  18 {
  19         const fdt64_t *val;
  20         int offset;
  21         int len;
  22
  23         offset = fdt_path_offset(gd->fdt_blob, "/memory");
  24         if (offset < 0)
  25                 return -EINVAL;
  26
  27         val = fdt_getprop(gd->fdt_blob, offset, "reg", &len);
  28         if (len < sizeof(*val) * 2)
  29                 return -EINVAL;
  30
  31         /* Use unaligned access since cache is still disabled */
  32         gd->ram_size = get_unaligned_be64(&val[1]);
  33
  34         return 0;
  35 }
  36
  37 int dram_init_banksize(void)
  38 {
  39         /* Reserve first 16 MiB of RAM for firmware */
  40         gd->bd->bi_dram[0].start = CONFIG_SYS_SDRAM_BASE + (16 * 1024 * 1024);
  41         gd->bd->bi_dram[0].size = gd->ram_size - (16 * 1024 * 1024);
  42
  43         return 0;
  44 }
  45
  46 void reset_cpu(ulong addr)
  47 {
  48         psci_system_reset();
  49 }
  50
  51 static struct mm_region gxbb_mem_map[] = {
  52         {
  53                 .virt = 0x0UL,
  54                 .phys = 0x0UL,
  55                 .size = 0x80000000UL,
  56                 .attrs = PTE_BLOCK_MEMTYPE(MT_NORMAL) |
  57                          PTE_BLOCK_INNER_SHARE
  58         }, {
  59                 .virt = 0x80000000UL,
  60                 .phys = 0x80000000UL,
  61                 .size = 0x80000000UL,
  62                 .attrs = PTE_BLOCK_MEMTYPE(MT_DEVICE_NGNRNE) |
  63                          PTE_BLOCK_NON_SHARE |
  64                          PTE_BLOCK_PXN | PTE_BLOCK_UXN
  65         }, {
  66                 /* List terminator */
  67                 0,
  68         }
  69 };
  70
  71 struct mm_region *mem_map = gxbb_mem_map;