1/*
2 * Helper functions for working with the builtin symbol table
3 *
4 * Copyright (c) 2008-2009 Analog Devices Inc.
5 * Licensed under the GPL-2 or later.
6 */
7
8#include <common.h>
9
10/* We need the weak marking as this symbol is provided specially */
11extern const char system_map[] __attribute__((weak));
12
13/* Given an address, return a pointer to the symbol name and store
14 * the base address in caddr.  So if the symbol map had an entry:
15 *		03fb9b7c_spi_cs_deactivate
16 * Then the following call:
17 *		unsigned long base;
18 *		const char *sym = symbol_lookup(0x03fb9b80, &base);
19 * Would end up setting the variables like so:
20 *		base = 0x03fb9b7c;
21 *		sym = "_spi_cs_deactivate";
22 */
23const char *symbol_lookup(unsigned long addr, unsigned long *caddr)
24{
25	const char *sym, *csym;
26	char *esym;
27	unsigned long sym_addr;
28
29	sym = system_map;
30	csym = NULL;
31	*caddr = 0;
32
33	while (*sym) {
34		sym_addr = hextoul(sym, &esym);
35		sym = esym;
36		if (sym_addr > addr)
37			break;
38		*caddr = sym_addr;
39		csym = sym;
40		sym += strlen(sym) + 1;
41	}
42
43	return csym;
44}
45