/*
   * Helper functions for working with the builtin symbol table
   *
   * Copyright (c) 2008-2009 Analog Devices Inc.
   * Licensed under the GPL-2 or later.
   */
  
  #include <common.h>
  
  /* We need the weak marking as this symbol is provided specially */
  extern const char system_map[] __attribute__((weak));
  
  /* Given an address, return a pointer to the symbol name and store
   * the base address in caddr.  So if the symbol map had an entry:
   *		03fb9b7c_spi_cs_deactivate
   * Then the following call:
   *		unsigned long base;
   *		const char *sym = symbol_lookup(0x03fb9b80, &base);
   * Would end up setting the variables like so:
   *		base = 0x03fb9b7c;
   *		sym = "_spi_cs_deactivate";
   */
  const char *symbol_lookup(unsigned long addr, unsigned long *caddr)
  {
  	const char *sym, *csym;
  	char *esym;
  	unsigned long sym_addr;
  
  	sym = system_map;
  	csym = NULL;
  	*caddr = 0;
  
  	while (*sym) {
  		sym_addr = simple_strtoul(sym, &esym, 16);
  		sym = esym;
  		if (sym_addr > addr)
  			break;
  		*caddr = sym_addr;
  		csym = sym;
  		sym += strlen(sym) + 1;
  	}
  
  	return csym;
  }