blob: f7a61346ee25d7f9f3e9d33e83d6cb4dce91fffd (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
|
/*
* intc.c
*
* (C) Copyright 2009, Greg Ungerer <gerg@snapgear.com>
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file COPYING in the main directory of this archive
* for more details.
*/
#include <linux/types.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/io.h>
#include <asm/traps.h>
#include <asm/coldfire.h>
#include <asm/mcfsim.h>
/*
* Define the vector numbers for the basic 7 interrupt sources.
* These are often referred to as the "external" interrupts in
* the ColdFire documentation (for the early ColdFire cores at least).
*/
#define EIRQ1 25
#define EIRQ7 31
/*
* Interrupts can be "vectored" on the ColdFire cores that support this old
* interrupt controller. That is, the device raising the interrupt can also
* supply the vector number to interrupt through. The AVR register of the
* interrupt controller enables or disables this for each external interrupt,
* so provide generic support for this. Setting this up is out-of-band for
* the interrupt system API's, and needs to be done by the driver that
* supports this device. Very few devices actually use this.
*/
void mcf_autovector(int irq)
{
if ((irq >= EIRQ1) && (irq <= EIRQ7)) {
u8 avec;
avec = __raw_readb(MCF_MBAR + MCFSIM_AVR);
avec |= (0x1 << (irq - EIRQ1 + 1));
__raw_writeb(avec, MCF_MBAR + MCFSIM_AVR);
}
}
static void intc_irq_mask(unsigned int irq)
{
}
static void intc_irq_unmask(unsigned int irq)
{
}
static int intc_irq_set_type(unsigned int irq, unsigned int type)
{
return 0;
}
static struct irq_chip intc_irq_chip = {
.name = "CF-INTC",
.mask = intc_irq_mask,
.unmask = intc_irq_unmask,
.set_type = intc_irq_set_type,
};
void __init init_IRQ(void)
{
int irq;
init_vectors();
for (irq = 0; (irq < NR_IRQS); irq++) {
irq_desc[irq].status = IRQ_DISABLED;
irq_desc[irq].action = NULL;
irq_desc[irq].depth = 1;
irq_desc[irq].chip = &intc_irq_chip;
intc_irq_set_type(irq, 0);
}
}
|
