Linux Kernel  3.7.1
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board_setup.c
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1 /*
2  * JBS Specific board startup routines.
3  *
4  * Copyright 2005, Embedded Alley Solutions, Inc
5  *
6  * This program is free software; you can redistribute it and/or modify it
7  * under the terms of the GNU General Public License as published by the
8  * Free Software Foundation; either version 2 of the License, or (at your
9  * option) any later version.
10  *
11  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
12  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
13  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
14  * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
15  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
16  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
17  * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
18  * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
19  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
20  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
21  *
22  * You should have received a copy of the GNU General Public License along
23  * with this program; if not, write to the Free Software Foundation, Inc.,
24  * 675 Mass Ave, Cambridge, MA 02139, USA.
25  */
26 #include <linux/init.h>
27 #include <linux/sched.h>
28 #include <linux/ioport.h>
29 #include <linux/mm.h>
30 #include <linux/console.h>
31 #include <linux/mc146818rtc.h>
32 #include <linux/delay.h>
33 
34 #include <asm/cpu.h>
35 #include <asm/bootinfo.h>
36 #include <asm/irq.h>
37 #include <asm/mipsregs.h>
38 #include <asm/reboot.h>
39 #include <asm/pgtable.h>
40 
41 #include <glb.h>
42 
43 /* CP0 hazard avoidance. */
44 #define BARRIER __asm__ __volatile__(".set noreorder\n\t" \
45  "nop; nop; nop; nop; nop; nop;\n\t" \
46  ".set reorder\n\t")
47 
48 void __init board_setup(void)
49 {
50  unsigned long configpr;
51 
52  configpr = read_c0_config7();
53  configpr |= (1<<19); /* enable tlb */
54  write_c0_config7(configpr);
55  BARRIER;
56 }