LXR uboot/arch/arm/cpu/armv7/virt-dt.c

   1/*
   2 * Copyright (C) 2013 - ARM Ltd
   3 * Author: Marc Zyngier <marc.zyngier@arm.com>
   4 *
   5 * This program is free software; you can redistribute it and/or modify
   6 * it under the terms of the GNU General Public License version 2 as
   7 * published by the Free Software Foundation.
   8 *
   9 * This program is distributed in the hope that it will be useful,
  10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 * GNU General Public License for more details.
  13 *
  14 * You should have received a copy of the GNU General Public License
  15 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16 */
  17
  18#include <common.h>
  19#include <errno.h>
  20#include <stdio_dev.h>
  21#include <linux/ctype.h>
  22#include <linux/types.h>
  23#include <asm/global_data.h>
  24#include <linux/libfdt.h>
  25#include <fdt_support.h>
  26#include <asm/armv7.h>
  27#include <asm/psci.h>
  28
  29int armv7_apply_memory_carveout(u64 *start, u64 *size)
  30{
  31#ifdef CONFIG_ARMV7_SECURE_RESERVE_SIZE
  32        if (*start + *size < CONFIG_ARMV7_SECURE_BASE ||
  33            *start >= (u64)CONFIG_ARMV7_SECURE_BASE +
  34                      CONFIG_ARMV7_SECURE_RESERVE_SIZE)
  35                return 0;
  36
  37        /* carveout must be at the beginning or the end of the bank */
  38        if (*start == CONFIG_ARMV7_SECURE_BASE ||
  39            *start + *size == (u64)CONFIG_ARMV7_SECURE_BASE +
  40                              CONFIG_ARMV7_SECURE_RESERVE_SIZE) {
  41                if (*size < CONFIG_ARMV7_SECURE_RESERVE_SIZE) {
  42                        debug("Secure monitor larger than RAM bank!?\n");
  43                        return -EINVAL;
  44                }
  45                *size -= CONFIG_ARMV7_SECURE_RESERVE_SIZE;
  46                if (*start == CONFIG_ARMV7_SECURE_BASE)
  47                        *start += CONFIG_ARMV7_SECURE_RESERVE_SIZE;
  48                return 0;
  49        }
  50        debug("Secure monitor not located at beginning or end of RAM bank\n");
  51        return -EINVAL;
  52#else /* !CONFIG_ARMV7_SECURE_RESERVE_SIZE */
  53        return 0;
  54#endif
  55}
  56
  57int psci_update_dt(void *fdt)
  58{
  59#ifdef CONFIG_ARMV7_NONSEC
  60        if (!armv7_boot_nonsec())
  61                return 0;
  62#endif
  63#ifndef CONFIG_ARMV7_SECURE_BASE
  64        /* secure code lives in RAM, keep it alive */
  65        fdt_add_mem_rsv(fdt, (unsigned long)__secure_start,
  66                        __secure_end - __secure_start);
  67#endif
  68
  69        return fdt_psci(fdt);
  70}
  71