LXR uboot/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
  15DECLARE_GLOBAL_DATA_PTR;
  16
  17int 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
  37void 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
  44void reset_cpu(ulong addr)
  45{
  46        psci_system_reset();
  47}
  48
  49static struct mm_region gxbb_mem_map[] = {
  50        {
  51                .virt = 0x0UL,
  52                .phys = 0x0UL,
  53                .size = 0x80000000UL,
  54                .attrs = PTE_BLOCK_MEMTYPE(MT_NORMAL) |
  55                         PTE_BLOCK_INNER_SHARE
  56        }, {
  57                .virt = 0x80000000UL,
  58                .phys = 0x80000000UL,
  59                .size = 0x80000000UL,
  60                .attrs = PTE_BLOCK_MEMTYPE(MT_DEVICE_NGNRNE) |
  61                         PTE_BLOCK_NON_SHARE |
  62                         PTE_BLOCK_PXN | PTE_BLOCK_UXN
  63        }, {
  64                /* List terminator */
  65                0,
  66        }
  67};
  68
  69struct mm_region *mem_map = gxbb_mem_map;
  70