Rev 206 | Rev 305 | Go to most recent revision | Only display areas with differences | Ignore whitespace | Details | Blame | Last modification | View Log | RSS feed
Rev 206 | Rev 302 | ||
---|---|---|---|
1 | /* |
1 | /* |
2 | * Copyright (C) 2001-2004 Jakub Jermar |
2 | * Copyright (C) 2001-2004 Jakub Jermar |
3 | * All rights reserved. |
3 | * All rights reserved. |
4 | * |
4 | * |
5 | * Redistribution and use in source and binary forms, with or without |
5 | * Redistribution and use in source and binary forms, with or without |
6 | * modification, are permitted provided that the following conditions |
6 | * modification, are permitted provided that the following conditions |
7 | * are met: |
7 | * are met: |
8 | * |
8 | * |
9 | * - Redistributions of source code must retain the above copyright |
9 | * - Redistributions of source code must retain the above copyright |
10 | * notice, this list of conditions and the following disclaimer. |
10 | * notice, this list of conditions and the following disclaimer. |
11 | * - Redistributions in binary form must reproduce the above copyright |
11 | * - Redistributions in binary form must reproduce the above copyright |
12 | * notice, this list of conditions and the following disclaimer in the |
12 | * notice, this list of conditions and the following disclaimer in the |
13 | * documentation and/or other materials provided with the distribution. |
13 | * documentation and/or other materials provided with the distribution. |
14 | * - The name of the author may not be used to endorse or promote products |
14 | * - The name of the author may not be used to endorse or promote products |
15 | * derived from this software without specific prior written permission. |
15 | * derived from this software without specific prior written permission. |
16 | * |
16 | * |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
27 | */ |
27 | */ |
28 | 28 | ||
29 | #include <arch/i8259.h> |
29 | #include <arch/i8259.h> |
30 | #include <cpu.h> |
30 | #include <cpu.h> |
31 | #include <arch/types.h> |
31 | #include <arch/types.h> |
32 | #include <arch/asm.h> |
32 | #include <arch/asm.h> |
33 | #include <arch.h> |
33 | #include <arch.h> |
34 | #include <print.h> |
34 | #include <print.h> |
35 | 35 | ||
36 | /* |
36 | /* |
37 | * This is the PIC driver. |
37 | * This is the PIC driver. |
38 | * Programmable Interrupt Controller for UP systems. |
38 | * Programmable Interrupt Controller for UP systems. |
39 | */ |
39 | */ |
40 | 40 | ||
41 | void i8259_init(void) |
41 | void i8259_init(void) |
42 | { |
42 | { |
43 | /* ICW1: this is ICW1, ICW4 to follow */ |
43 | /* ICW1: this is ICW1, ICW4 to follow */ |
44 | outb(PIC_PIC0PORT1, PIC_ICW1 | PIC_NEEDICW4); |
44 | outb(PIC_PIC0PORT1, PIC_ICW1 | PIC_NEEDICW4); |
45 | 45 | ||
46 | /* ICW2: IRQ 0 maps to INT IRQBASE */ |
46 | /* ICW2: IRQ 0 maps to INT IRQBASE */ |
47 | outb(PIC_PIC0PORT2, IVT_IRQBASE); |
47 | outb(PIC_PIC0PORT2, IVT_IRQBASE); |
48 | 48 | ||
49 | /* ICW3: pic1 using IRQ IRQ_PIC1 */ |
49 | /* ICW3: pic1 using IRQ IRQ_PIC1 */ |
50 | outb(PIC_PIC0PORT2, 1 << IRQ_PIC1); |
50 | outb(PIC_PIC0PORT2, 1 << IRQ_PIC1); |
51 | 51 | ||
52 | /* ICW4: i8086 mode */ |
52 | /* ICW4: i8086 mode */ |
53 | outb(PIC_PIC0PORT2, 1); |
53 | outb(PIC_PIC0PORT2, 1); |
54 | 54 | ||
55 | /* ICW1: ICW1, ICW4 to follow */ |
55 | /* ICW1: ICW1, ICW4 to follow */ |
56 | outb(PIC_PIC1PORT1, PIC_ICW1 | PIC_NEEDICW4); |
56 | outb(PIC_PIC1PORT1, PIC_ICW1 | PIC_NEEDICW4); |
57 | 57 | ||
58 | /* ICW2: IRQ 8 maps to INT (IVT_IRQBASE + 8) */ |
58 | /* ICW2: IRQ 8 maps to INT (IVT_IRQBASE + 8) */ |
59 | outb(PIC_PIC1PORT2, IVT_IRQBASE + 8); |
59 | outb(PIC_PIC1PORT2, IVT_IRQBASE + 8); |
60 | 60 | ||
61 | /* ICW3: pic1 is known as PIC_PIC1ID */ |
61 | /* ICW3: pic1 is known as PIC_PIC1ID */ |
62 | outb(PIC_PIC1PORT2, PIC_PIC1ID); |
62 | outb(PIC_PIC1PORT2, IRQ_PIC1); |
63 | 63 | ||
64 | /* ICW4: i8086 mode */ |
64 | /* ICW4: i8086 mode */ |
65 | outb(PIC_PIC1PORT2, 1); |
65 | outb(PIC_PIC1PORT2, 1); |
66 | 66 | ||
67 | /* |
67 | /* |
68 | * Register interrupt handler for the PIC spurious interrupt. |
68 | * Register interrupt handler for the PIC spurious interrupt. |
69 | */ |
69 | */ |
70 | trap_register(VECTOR_PIC_SPUR, pic_spurious); |
70 | trap_register(VECTOR_PIC_SPUR, pic_spurious); |
71 | 71 | ||
72 | /* |
72 | /* |
73 | * Set the enable/disable IRQs handlers. |
73 | * Set the enable/disable IRQs handlers. |
74 | * Set the End-of-Interrupt handler. |
74 | * Set the End-of-Interrupt handler. |
75 | */ |
75 | */ |
76 | enable_irqs_function = pic_enable_irqs; |
76 | enable_irqs_function = pic_enable_irqs; |
77 | disable_irqs_function = pic_disable_irqs; |
77 | disable_irqs_function = pic_disable_irqs; |
78 | eoi_function = pic_eoi; |
78 | eoi_function = pic_eoi; |
79 | 79 | ||
80 | pic_disable_irqs(0xffff); /* disable all irq's */ |
80 | pic_disable_irqs(0xffff); /* disable all irq's */ |
81 | pic_enable_irqs(1<<IRQ_PIC1); /* but enable pic1 */ |
81 | pic_enable_irqs(1<<IRQ_PIC1); /* but enable pic1 */ |
82 | } |
82 | } |
83 | 83 | ||
84 | void pic_enable_irqs(__u16 irqmask) |
84 | void pic_enable_irqs(__u16 irqmask) |
85 | { |
85 | { |
86 | __u8 x; |
86 | __u8 x; |
87 | 87 | ||
88 | if (irqmask & 0xff) { |
88 | if (irqmask & 0xff) { |
89 | x = inb(PIC_PIC0PORT2); |
89 | x = inb(PIC_PIC0PORT2); |
90 | outb(PIC_PIC0PORT2, x & (~(irqmask & 0xff))); |
90 | outb(PIC_PIC0PORT2, x & (~(irqmask & 0xff))); |
91 | } |
91 | } |
92 | if (irqmask >> 8) { |
92 | if (irqmask >> 8) { |
93 | x = inb(PIC_PIC1PORT2); |
93 | x = inb(PIC_PIC1PORT2); |
94 | outb(PIC_PIC1PORT2, x & (~(irqmask >> 8))); |
94 | outb(PIC_PIC1PORT2, x & (~(irqmask >> 8))); |
95 | } |
95 | } |
96 | } |
96 | } |
97 | 97 | ||
98 | void pic_disable_irqs(__u16 irqmask) |
98 | void pic_disable_irqs(__u16 irqmask) |
99 | { |
99 | { |
100 | __u8 x; |
100 | __u8 x; |
101 | 101 | ||
102 | if (irqmask & 0xff) { |
102 | if (irqmask & 0xff) { |
103 | x = inb(PIC_PIC0PORT2); |
103 | x = inb(PIC_PIC0PORT2); |
104 | outb(PIC_PIC0PORT2, x | (irqmask & 0xff)); |
104 | outb(PIC_PIC0PORT2, x | (irqmask & 0xff)); |
105 | } |
105 | } |
106 | if (irqmask >> 8) { |
106 | if (irqmask >> 8) { |
107 | x = inb(PIC_PIC1PORT2); |
107 | x = inb(PIC_PIC1PORT2); |
108 | outb(PIC_PIC1PORT2, x | (irqmask >> 8)); |
108 | outb(PIC_PIC1PORT2, x | (irqmask >> 8)); |
109 | } |
109 | } |
110 | } |
110 | } |
111 | 111 | ||
112 | void pic_eoi(void) |
112 | void pic_eoi(void) |
113 | { |
113 | { |
114 | outb(0x20,0x20); |
114 | outb(0x20,0x20); |
115 | outb(0xa0,0x20); |
115 | outb(0xa0,0x20); |
116 | } |
116 | } |
117 | 117 | ||
118 | void pic_spurious(__u8 n, __native stack[]) |
118 | void pic_spurious(__u8 n, __native stack[]) |
119 | { |
119 | { |
120 | printf("cpu%d: PIC spurious interrupt\n", CPU->id); |
120 | printf("cpu%d: PIC spurious interrupt\n", CPU->id); |
121 | } |
121 | } |
122 | 122 |