Root/arch/mips/jz47xx/setup.c

Source at commit 0183861 created 11 years 5 months ago.
By Lars-Peter Clausen, JZ47XX: Fix JZ4760 access to vmalloc'ed memory
1/*
2 * Copyright (C) 2009-2010, Lars-Peter Clausen <lars@metafoo.de>
3 * JZ4740 setup code
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License as published by the
7 * Free Software Foundation; either version 2 of the License, or (at your
8 * option) any later version.
9 *
10 * You should have received a copy of the GNU General Public License along
11 * with this program; if not, write to the Free Software Foundation, Inc.,
12 * 675 Mass Ave, Cambridge, MA 02139, USA.
13 *
14 */
15
16#include <linux/init.h>
17#include <linux/kernel.h>
18
19#include <asm/mach-jz47xx/soc.h>
20
21#include "reset.h"
22
23void __init plat_mem_setup(void)
24{
25    if (soc_is_jz4760()) {
26        /* Found in the original Ingenic Linux SDK, without it accessing
27         * vmalloc'ed memory hardlocks the CPU */
28        __asm__ (
29            "li $2, 0xa9000000 \n\t"
30            "mtc0 $2, $5, 4 \n\t"
31            "nop \n\t"
32            ::"r"(2));
33    }
34
35    jz4740_reset_init();
36}
37
38const char *get_system_type(void)
39{
40    if (soc_is_jz4740())
41        return "JZ4740";
42    else if(soc_is_jz4750l())
43        return "JZ4750L";
44    else if(soc_is_jz4760())
45        return "JZ4760";
46    else
47        return "unknown";
48}
49

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