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
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
|
/*
* U-boot - irq.h Interrupt related header file
*
* Copyright (c) 2005-2007 Analog Devices Inc.
*
* This file was based on
* linux/arch/$(ARCH)/platform/$(PLATFORM)/irq.c
*
* Changed by HuTao Apr18, 2003
*
* Copyright was missing when I got the code so took from MIPS arch ...MaTed---
* Copyright (C) 1994 by Waldorf GMBH, written by Ralf Baechle
* Copyright (C) 1995, 96, 97, 98, 99, 2000, 2001 by Ralf Baechle
*
* Adapted for BlackFin (ADI) by Ted Ma <mated@sympatico.ca>
* Copyright (c) 2002 Arcturus Networks Inc. (www.arcturusnetworks.com)
* Copyright (c) 2002 Lineo, Inc. <mattw@lineo.com>
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
* MA 02110-1301 USA
*/
#ifndef _BLACKFIN_IRQ_H_
#define _BLACKFIN_IRQ_H_
#include <linux/config.h>
#include <asm/hw_irq.h>
/*
* On the Blackfin, the interrupt structure allows remmapping of the hardware
* levels.
* - I'm going to assume that the H/W level is going to stay at the default
* settings. If someone wants to go through and abstart this out, feel free
* to mod the interrupt numbering scheme.
* - I'm abstracting the interrupts so that uClinux does not know anything
* about the H/W levels. If you want to change the H/W AND keep the abstracted
* levels that uClinux sees, you should be able to do most of it here.
* - I've left the "abstract" numbering sparce in case someone wants to pull the
* interrupts apart (just the TX/RX for the various devices)
*/
#define NR_IRQS SYS_IRQS
/*
* "Generic" interrupt sources
*/
#define IRQ_SCHED_TIMER (8) /* interrupt source for scheduling timer */
static __inline__ int irq_cannonicalize(int irq)
{
return irq;
}
/*
* Machine specific interrupt sources.
*
* Adding an interrupt service routine for a source with this bit
* set indicates a special machine specific interrupt source.
* The machine specific files define these sources.
*
* The IRQ_MACHSPEC bit is now gone - the only thing it did was to
* introduce unnecessary overhead.
*
* All interrupt handling is actually machine specific so it is better
* to use function pointers, as used by the Sparc port, and select the
* interrupt handling functions when initializing the kernel. This way
* we save some unnecessary overhead at run-time.
* 01/11/97 - Jes
*/
extern void (*mach_enable_irq) (unsigned int);
extern void (*mach_disable_irq) (unsigned int);
extern int sys_request_irq(unsigned int,
void (*)(int, void *, struct pt_regs *),
unsigned long, const char *, void *);
extern void sys_free_irq(unsigned int, void *);
/*
* various flags for request_irq() - the Amiga now uses the standard
* mechanism like all other architectures - SA_INTERRUPT and SA_SHIRQ
* are your friends.
*/
#define IRQ_FLG_LOCK (0x0001) /* handler is not replaceable */
#define IRQ_FLG_REPLACE (0x0002) /* replace existing handler */
#define IRQ_FLG_FAST (0x0004)
#define IRQ_FLG_SLOW (0x0008)
#define IRQ_FLG_STD (0x8000) /* internally used */
/*
* This structure is used to chain together the ISRs for a particular
* interrupt source (if it supports chaining).
*/
typedef struct irq_node {
void (*handler) (int, void *, struct pt_regs *);
unsigned long flags;
void *dev_id;
const char *devname;
struct irq_node *next;
} irq_node_t;
/*
* This structure has only 4 elements for speed reasons
*/
typedef struct irq_handler {
void (*handler) (int, void *, struct pt_regs *);
unsigned long flags;
void *dev_id;
const char *devname;
} irq_handler_t;
/* count of spurious interrupts */
extern volatile unsigned int num_spurious;
/*
* This function returns a new irq_node_t
*/
extern irq_node_t *new_irq_node(void);
/*
* Some drivers want these entry points
*/
#define enable_irq(x) (mach_enable_irq ? (*mach_enable_irq)(x) : 0)
#define disable_irq(x) (mach_disable_irq ? (*mach_disable_irq)(x) : 0)
#define enable_irq_nosync(x) enable_irq(x)
#define disable_irq_nosync(x) disable_irq(x)
#endif
|
