// SPDX-License-Identifier: GPL-2.0-only
  //
  // Copyright (C) 2019 Socionext Inc.
  //   Author: Masahiro Yamada <yamada.masahiro@socionext.com>
  
  #include <common.h>
  #include <dm/of.h>
  #include <fdt_support.h>
  #include <linux/io.h>
  #include <linux/libfdt.h>
  #include <linux/sizes.h>
  #include <asm/global_data.h>
  
  #include "base-address.h"
  #include "sc64-regs.h"
  #include "sg-regs.h"
  
  /*
   * Dummy initializers are needed to allocate these to .data section instead of
   * .bss section. The .bss section is unusable before relocation because the
   * .bss section and DT share the same address. Without the initializers,
   * DT would be broken.
   */
  void __iomem *sc_base = (void *)0xdeadbeef;
  void __iomem *sg_base = (void *)0xdeadbeef;
  
  static u64 uniphier_base_address_get(const char *compat_tail)
  {
  	DECLARE_GLOBAL_DATA_PTR;
  	const void *fdt = gd->fdt_blob;
  	int offset, len, i;
  	const char *str;
  
  	for (offset = fdt_next_node(fdt, 0, NULL);
  	     offset >= 0;
  	     offset = fdt_next_node(fdt, offset, NULL)) {
  		for (i = 0;
  		     (str = fdt_stringlist_get(fdt, offset, "compatible", i, &len));
  		     i++) {
  			if (!memcmp(compat_tail,
  				    str + len - strlen(compat_tail),
  				    strlen(compat_tail)))
  				return fdt_get_base_address(fdt, offset);
  		}
  	}
  
  	return OF_BAD_ADDR;
  }
  
  int uniphier_base_address_init(void)
  {
  	u64 base;
  
  	base = uniphier_base_address_get("-soc-glue");
  	if (base == OF_BAD_ADDR)
  		return -EINVAL;
  
  	sg_base = ioremap(base, SZ_8K);
  
  	base = uniphier_base_address_get("-sysctrl");
  	if (base == OF_BAD_ADDR)
  		return -EINVAL;
  
  	sc_base = ioremap(base, SZ_64K);
  
  	return 0;
  }