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
|
/*
* from: vector.s, 386BSD 0.1 unknown origin
* $FreeBSD$
*/
#define IRQ_BIT(irq_num) (1 << ((irq_num) % 8))
#define IRQ_BYTE(irq_num) ((irq_num) >> 3)
#define ENABLE_ICU1 \
movb $ICU_EOI,%al ; /* as soon as possible send EOI ... */ \
outb %al,$IO_ICU1 /* ... to clear in service bit */
#define ENABLE_ICU1_AND_2 \
movb $ICU_EOI,%al ; /* as above */ \
outb %al,$IO_ICU2 ; /* but do second icu first ... */ \
outb %al,$IO_ICU1 /* ... then first icu */
/*
* Macros for interrupt interrupt entry, call to handler, and exit.
*/
#define FAST_INTR(irq_num, vec_name, enable_icus) \
.text ; \
SUPERALIGN_TEXT ; \
IDTVEC(vec_name) ; \
subq $TF_RIP,%rsp ; /* skip dummy tf_err and tf_trapno */ \
testb $SEL_RPL_MASK,TF_CS(%rsp) ; /* come from kernel? */ \
jz 1f ; /* Yes, dont swapgs again */ \
swapgs ; \
1: movq %rdi,TF_RDI(%rsp) ; \
movq %rsi,TF_RSI(%rsp) ; \
movq %rdx,TF_RDX(%rsp) ; \
movq %rcx,TF_RCX(%rsp) ; \
movq %r8,TF_R8(%rsp) ; \
movq %r9,TF_R9(%rsp) ; \
movq %rax,TF_RAX(%rsp) ; \
movq %rbx,TF_RBX(%rsp) ; \
movq %rbp,TF_RBP(%rsp) ; \
movq %r10,TF_R10(%rsp) ; \
movq %r11,TF_R11(%rsp) ; \
movq %r12,TF_R12(%rsp) ; \
movq %r13,TF_R13(%rsp) ; \
movq %r14,TF_R14(%rsp) ; \
movq %r15,TF_R15(%rsp) ; \
call critical_enter ; \
movq PCPU(CURTHREAD),%rbx ; \
incl TD_INTR_NESTING_LEVEL(%rbx) ; \
movq intr_unit + (irq_num) * 8, %rdi ; \
call *intr_handler + (irq_num) * 8 ; /* do the work ASAP */ \
enable_icus ; /* (re)enable ASAP (helps edge trigger?) */ \
incl cnt+V_INTR ; /* book-keeping can wait */ \
movq intr_countp + (irq_num) * 8,%rax ; \
incq (%rax) ; \
decl TD_INTR_NESTING_LEVEL(%rbx) ; \
call critical_exit ; \
jmp doreti
/*
* Slow, threaded interrupts.
*
* XXX Most of the parameters here are obsolete. Fix this when we're
* done.
* XXX we really shouldn't return via doreti if we just schedule the
* interrupt handler and don't run anything. We could just do an
* iret. FIXME.
*/
#define INTR(irq_num, vec_name, icu, enable_icus, maybe_extra_ipending) \
.text ; \
SUPERALIGN_TEXT ; \
IDTVEC(vec_name) ; \
subq $TF_RIP,%rsp ; /* skip dummy tf_err and tf_trapno */ \
testb $SEL_RPL_MASK,TF_CS(%rsp) ; /* come from kernel? */ \
jz 1f ; /* Yes, dont swapgs again */ \
swapgs ; \
1: movq %rdi,TF_RDI(%rsp) ; \
movq %rsi,TF_RSI(%rsp) ; \
movq %rdx,TF_RDX(%rsp) ; \
movq %rcx,TF_RCX(%rsp) ; \
movq %r8,TF_R8(%rsp) ; \
movq %r9,TF_R9(%rsp) ; \
movq %rax,TF_RAX(%rsp) ; \
movq %rbx,TF_RBX(%rsp) ; \
movq %rbp,TF_RBP(%rsp) ; \
movq %r10,TF_R10(%rsp) ; \
movq %r11,TF_R11(%rsp) ; \
movq %r12,TF_R12(%rsp) ; \
movq %r13,TF_R13(%rsp) ; \
movq %r14,TF_R14(%rsp) ; \
movq %r15,TF_R15(%rsp) ; \
maybe_extra_ipending ; \
movb imen + IRQ_BYTE(irq_num),%al ; \
orb $IRQ_BIT(irq_num),%al ; \
movb %al,imen + IRQ_BYTE(irq_num) ; \
outb %al,$icu+ICU_IMR_OFFSET ; \
enable_icus ; \
movq PCPU(CURTHREAD),%rbx ; \
incl TD_INTR_NESTING_LEVEL(%rbx) ; \
movq $irq_num, %rdi; /* pass the IRQ */ \
call sched_ithd ; \
decl TD_INTR_NESTING_LEVEL(%rbx) ; \
/* We could usually avoid the following jmp by inlining some of */ \
/* doreti, but it's probably better to use less cache. */ \
jmp doreti
MCOUNT_LABEL(bintr)
FAST_INTR(0,fastintr0, ENABLE_ICU1)
FAST_INTR(1,fastintr1, ENABLE_ICU1)
FAST_INTR(2,fastintr2, ENABLE_ICU1)
FAST_INTR(3,fastintr3, ENABLE_ICU1)
FAST_INTR(4,fastintr4, ENABLE_ICU1)
FAST_INTR(5,fastintr5, ENABLE_ICU1)
FAST_INTR(6,fastintr6, ENABLE_ICU1)
FAST_INTR(7,fastintr7, ENABLE_ICU1)
FAST_INTR(8,fastintr8, ENABLE_ICU1_AND_2)
FAST_INTR(9,fastintr9, ENABLE_ICU1_AND_2)
FAST_INTR(10,fastintr10, ENABLE_ICU1_AND_2)
FAST_INTR(11,fastintr11, ENABLE_ICU1_AND_2)
FAST_INTR(12,fastintr12, ENABLE_ICU1_AND_2)
FAST_INTR(13,fastintr13, ENABLE_ICU1_AND_2)
FAST_INTR(14,fastintr14, ENABLE_ICU1_AND_2)
FAST_INTR(15,fastintr15, ENABLE_ICU1_AND_2)
#define CLKINTR_PENDING movl $1,CNAME(clkintr_pending)
/* Threaded interrupts */
INTR(0,intr0, IO_ICU1, ENABLE_ICU1, CLKINTR_PENDING)
INTR(1,intr1, IO_ICU1, ENABLE_ICU1,)
INTR(2,intr2, IO_ICU1, ENABLE_ICU1,)
INTR(3,intr3, IO_ICU1, ENABLE_ICU1,)
INTR(4,intr4, IO_ICU1, ENABLE_ICU1,)
INTR(5,intr5, IO_ICU1, ENABLE_ICU1,)
INTR(6,intr6, IO_ICU1, ENABLE_ICU1,)
INTR(7,intr7, IO_ICU1, ENABLE_ICU1,)
INTR(8,intr8, IO_ICU2, ENABLE_ICU1_AND_2,)
INTR(9,intr9, IO_ICU2, ENABLE_ICU1_AND_2,)
INTR(10,intr10, IO_ICU2, ENABLE_ICU1_AND_2,)
INTR(11,intr11, IO_ICU2, ENABLE_ICU1_AND_2,)
INTR(12,intr12, IO_ICU2, ENABLE_ICU1_AND_2,)
INTR(13,intr13, IO_ICU2, ENABLE_ICU1_AND_2,)
INTR(14,intr14, IO_ICU2, ENABLE_ICU1_AND_2,)
INTR(15,intr15, IO_ICU2, ENABLE_ICU1_AND_2,)
MCOUNT_LABEL(eintr)
|
