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1 /* MN103E010 Processor initialisation
2  *
3  * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
4  * Written by David Howells (dhowells@redhat.com)
5  *
6  * This program is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU General Public Licence
8  * as published by the Free Software Foundation; either version
9  * 2 of the Licence, or (at your option) any later version.
10  */
11 #include <linux/kernel.h>
12 #include <asm/rtc.h>
13 
14 /*
15  * initialise the on-silicon processor peripherals
16  */
processor_init(void)17 asmlinkage void __init processor_init(void)
18 {
19 	int loop;
20 
21 	/* set up the exception table first */
22 	for (loop = 0x000; loop < 0x400; loop += 8)
23 		__set_intr_stub(loop, __common_exception);
24 
25 	__set_intr_stub(EXCEP_ITLBMISS,		itlb_miss);
26 	__set_intr_stub(EXCEP_DTLBMISS,		dtlb_miss);
27 	__set_intr_stub(EXCEP_IAERROR,		itlb_aerror);
28 	__set_intr_stub(EXCEP_DAERROR,		dtlb_aerror);
29 	__set_intr_stub(EXCEP_BUSERROR,		raw_bus_error);
30 	__set_intr_stub(EXCEP_DOUBLE_FAULT,	double_fault);
31 	__set_intr_stub(EXCEP_SYSCALL0,		system_call);
32 
33 	__set_intr_stub(EXCEP_NMI,		nmi_handler);
34 	__set_intr_stub(EXCEP_WDT,		nmi_handler);
35 	__set_intr_stub(EXCEP_IRQ_LEVEL0,	irq_handler);
36 	__set_intr_stub(EXCEP_IRQ_LEVEL1,	irq_handler);
37 	__set_intr_stub(EXCEP_IRQ_LEVEL2,	irq_handler);
38 	__set_intr_stub(EXCEP_IRQ_LEVEL3,	irq_handler);
39 	__set_intr_stub(EXCEP_IRQ_LEVEL4,	irq_handler);
40 	__set_intr_stub(EXCEP_IRQ_LEVEL5,	irq_handler);
41 	__set_intr_stub(EXCEP_IRQ_LEVEL6,	irq_handler);
42 
43 	IVAR0 = EXCEP_IRQ_LEVEL0;
44 	IVAR1 = EXCEP_IRQ_LEVEL1;
45 	IVAR2 = EXCEP_IRQ_LEVEL2;
46 	IVAR3 = EXCEP_IRQ_LEVEL3;
47 	IVAR4 = EXCEP_IRQ_LEVEL4;
48 	IVAR5 = EXCEP_IRQ_LEVEL5;
49 	IVAR6 = EXCEP_IRQ_LEVEL6;
50 
51 	mn10300_dcache_flush_inv();
52 	mn10300_icache_inv();
53 
54 	/* disable all interrupts and set to priority 6 (lowest) */
55 	for (loop = 0; loop < NR_IRQS; loop++)
56 		GxICR(loop) = GxICR_LEVEL_6 | GxICR_DETECT;
57 
58 	/* clear the timers */
59 	TM0MD	= 0;
60 	TM1MD	= 0;
61 	TM2MD	= 0;
62 	TM3MD	= 0;
63 	TM4MD	= 0;
64 	TM5MD	= 0;
65 	TM6MD	= 0;
66 	TM6MDA	= 0;
67 	TM6MDB	= 0;
68 	TM7MD	= 0;
69 	TM8MD	= 0;
70 	TM9MD	= 0;
71 	TM10MD	= 0;
72 	TM11MD	= 0;
73 
74 	calibrate_clock();
75 }
76