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
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
|
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_IA64_HW_IRQ_H
#define _ASM_IA64_HW_IRQ_H
/*
* Copyright (C) 2001-2003 Hewlett-Packard Co
* David Mosberger-Tang <davidm@hpl.hp.com>
*/
#include <linux/interrupt.h>
#include <linux/sched.h>
#include <linux/types.h>
#include <linux/profile.h>
#include <asm/ptrace.h>
#include <asm/smp.h>
typedef u8 ia64_vector;
/*
* 0 special
*
* 1,3-14 are reserved from firmware
*
* 16-255 (vectored external interrupts) are available
*
* 15 spurious interrupt (see IVR)
*
* 16 lowest priority, 255 highest priority
*
* 15 classes of 16 interrupts each.
*/
#define IA64_MIN_VECTORED_IRQ 16
#define IA64_MAX_VECTORED_IRQ 255
#define IA64_NUM_VECTORS 256
#define AUTO_ASSIGN -1
#define IA64_SPURIOUS_INT_VECTOR 0x0f
/*
* Vectors 0x10-0x1f are used for low priority interrupts, e.g. CMCI.
*/
#define IA64_CPEP_VECTOR 0x1c /* corrected platform error polling vector */
#define IA64_CMCP_VECTOR 0x1d /* corrected machine-check polling vector */
#define IA64_CPE_VECTOR 0x1e /* corrected platform error interrupt vector */
#define IA64_CMC_VECTOR 0x1f /* corrected machine-check interrupt vector */
/*
* Vectors 0x20-0x2f are reserved for legacy ISA IRQs.
* Use vectors 0x30-0xe7 as the default device vector range for ia64.
* Platforms may choose to reduce this range in platform_irq_setup, but the
* platform range must fall within
* [IA64_DEF_FIRST_DEVICE_VECTOR..IA64_DEF_LAST_DEVICE_VECTOR]
*/
extern int ia64_first_device_vector;
extern int ia64_last_device_vector;
#ifdef CONFIG_SMP
/* Reserve the lower priority vector than device vectors for "move IRQ" IPI */
#define IA64_IRQ_MOVE_VECTOR 0x30 /* "move IRQ" IPI */
#define IA64_DEF_FIRST_DEVICE_VECTOR 0x31
#else
#define IA64_DEF_FIRST_DEVICE_VECTOR 0x30
#endif
#define IA64_DEF_LAST_DEVICE_VECTOR 0xe7
#define IA64_FIRST_DEVICE_VECTOR ia64_first_device_vector
#define IA64_LAST_DEVICE_VECTOR ia64_last_device_vector
#define IA64_MAX_DEVICE_VECTORS (IA64_DEF_LAST_DEVICE_VECTOR - IA64_DEF_FIRST_DEVICE_VECTOR + 1)
#define IA64_NUM_DEVICE_VECTORS (IA64_LAST_DEVICE_VECTOR - IA64_FIRST_DEVICE_VECTOR + 1)
#define IA64_MCA_RENDEZ_VECTOR 0xe8 /* MCA rendez interrupt */
#define IA64_TIMER_VECTOR 0xef /* use highest-prio group 15 interrupt for timer */
#define IA64_MCA_WAKEUP_VECTOR 0xf0 /* MCA wakeup (must be >MCA_RENDEZ_VECTOR) */
#define IA64_IPI_LOCAL_TLB_FLUSH 0xfc /* SMP flush local TLB */
#define IA64_IPI_RESCHEDULE 0xfd /* SMP reschedule */
#define IA64_IPI_VECTOR 0xfe /* inter-processor interrupt vector */
/* Used for encoding redirected irqs */
#define IA64_IRQ_REDIRECTED (1 << 31)
/* IA64 inter-cpu interrupt related definitions */
#define IA64_IPI_DEFAULT_BASE_ADDR 0xfee00000
/* Delivery modes for inter-cpu interrupts */
enum {
IA64_IPI_DM_INT = 0x0, /* pend an external interrupt */
IA64_IPI_DM_PMI = 0x2, /* pend a PMI */
IA64_IPI_DM_NMI = 0x4, /* pend an NMI (vector 2) */
IA64_IPI_DM_INIT = 0x5, /* pend an INIT interrupt */
IA64_IPI_DM_EXTINT = 0x7, /* pend an 8259-compatible interrupt. */
};
extern __u8 isa_irq_to_vector_map[16];
#define isa_irq_to_vector(x) isa_irq_to_vector_map[(x)]
struct irq_cfg {
ia64_vector vector;
cpumask_t domain;
cpumask_t old_domain;
unsigned move_cleanup_count;
u8 move_in_progress : 1;
};
extern spinlock_t vector_lock;
extern struct irq_cfg irq_cfg[NR_IRQS];
#define irq_to_domain(x) irq_cfg[(x)].domain
DECLARE_PER_CPU(int[IA64_NUM_VECTORS], vector_irq);
extern struct irq_chip irq_type_ia64_lsapic; /* CPU-internal interrupt controller */
#define ia64_register_ipi ia64_native_register_ipi
#define assign_irq_vector ia64_native_assign_irq_vector
#define free_irq_vector ia64_native_free_irq_vector
#define ia64_resend_irq ia64_native_resend_irq
extern void ia64_native_register_ipi(void);
extern int bind_irq_vector(int irq, int vector, cpumask_t domain);
extern int ia64_native_assign_irq_vector (int irq); /* allocate a free vector */
extern void ia64_native_free_irq_vector (int vector);
extern int reserve_irq_vector (int vector);
extern void __setup_vector_irq(int cpu);
extern void ia64_send_ipi (int cpu, int vector, int delivery_mode, int redirect);
extern void destroy_and_reserve_irq (unsigned int irq);
#ifdef CONFIG_SMP
extern int irq_prepare_move(int irq, int cpu);
extern void irq_complete_move(unsigned int irq);
#else
static inline int irq_prepare_move(int irq, int cpu) { return 0; }
static inline void irq_complete_move(unsigned int irq) {}
#endif
static inline void ia64_native_resend_irq(unsigned int vector)
{
ia64_send_ipi(smp_processor_id(), vector, IA64_IPI_DM_INT, 0);
}
/*
* Next follows the irq descriptor interface. On IA-64, each CPU supports 256 interrupt
* vectors. On smaller systems, there is a one-to-one correspondence between interrupt
* vectors and the Linux irq numbers. However, larger systems may have multiple interrupt
* domains meaning that the translation from vector number to irq number depends on the
* interrupt domain that a CPU belongs to. This API abstracts such platform-dependent
* differences and provides a uniform means to translate between vector and irq numbers
* and to obtain the irq descriptor for a given irq number.
*/
/* Extract the IA-64 vector that corresponds to IRQ. */
static inline ia64_vector
irq_to_vector (int irq)
{
return irq_cfg[irq].vector;
}
/*
* Convert the local IA-64 vector to the corresponding irq number. This translation is
* done in the context of the interrupt domain that the currently executing CPU belongs
* to.
*/
static inline unsigned int
local_vector_to_irq (ia64_vector vec)
{
return __this_cpu_read(vector_irq[vec]);
}
#endif /* _ASM_IA64_HW_IRQ_H */
|
