LXR linux/arch/mips/ath79/prom.c

   1// SPDX-License-Identifier: GPL-2.0-only
   2/*
   3 *  Atheros AR71XX/AR724X/AR913X specific prom routines
   4 *
   5 *  Copyright (C) 2015 Laurent Fasnacht <l@libres.ch>
   6 *  Copyright (C) 2008-2010 Gabor Juhos <juhosg@openwrt.org>
   7 *  Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
   8 */
   9
  10#include <linux/kernel.h>
  11#include <linux/init.h>
  12#include <linux/io.h>
  13#include <linux/string.h>
  14#include <linux/initrd.h>
  15
  16#include <asm/bootinfo.h>
  17#include <asm/addrspace.h>
  18#include <asm/fw/fw.h>
  19
  20#include "common.h"
  21
  22void __init prom_init(void)
  23{
  24        fw_init_cmdline();
  25
  26#ifdef CONFIG_BLK_DEV_INITRD
  27        /* Read the initrd address from the firmware environment */
  28        initrd_start = fw_getenvl("initrd_start");
  29        if (initrd_start) {
  30                initrd_start = KSEG0ADDR(initrd_start);
  31                initrd_end = initrd_start + fw_getenvl("initrd_size");
  32        }
  33#endif
  34}
  35
  36void __init prom_free_prom_memory(void)
  37{
  38        /* We do not have to prom memory to free */
  39}
  40