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| Rev 2439 | Rev 3902 | ||
|---|---|---|---|
| Line 47... | Line 47... | ||
| 47 | static void pic_spurious(int n, istate_t *istate); |
47 | static void pic_spurious(int n, istate_t *istate); |
| 48 | 48 | ||
| 49 | void i8259_init(void) |
49 | void i8259_init(void) |
| 50 | { |
50 | { |
| 51 | /* ICW1: this is ICW1, ICW4 to follow */ |
51 | /* ICW1: this is ICW1, ICW4 to follow */ |
| 52 | outb(PIC_PIC0PORT1, PIC_ICW1 | PIC_NEEDICW4); |
52 | pio_write_8(PIC_PIC0PORT1, PIC_ICW1 | PIC_NEEDICW4); |
| 53 | 53 | ||
| 54 | /* ICW2: IRQ 0 maps to INT IRQBASE */ |
54 | /* ICW2: IRQ 0 maps to INT IRQBASE */ |
| 55 | outb(PIC_PIC0PORT2, IVT_IRQBASE); |
55 | pio_write_8(PIC_PIC0PORT2, IVT_IRQBASE); |
| 56 | 56 | ||
| 57 | /* ICW3: pic1 using IRQ IRQ_PIC1 */ |
57 | /* ICW3: pic1 using IRQ IRQ_PIC1 */ |
| 58 | outb(PIC_PIC0PORT2, 1 << IRQ_PIC1); |
58 | pio_write_8(PIC_PIC0PORT2, 1 << IRQ_PIC1); |
| 59 | 59 | ||
| 60 | /* ICW4: i8086 mode */ |
60 | /* ICW4: i8086 mode */ |
| 61 | outb(PIC_PIC0PORT2, 1); |
61 | pio_write_8(PIC_PIC0PORT2, 1); |
| 62 | 62 | ||
| 63 | /* ICW1: ICW1, ICW4 to follow */ |
63 | /* ICW1: ICW1, ICW4 to follow */ |
| 64 | outb(PIC_PIC1PORT1, PIC_ICW1 | PIC_NEEDICW4); |
64 | pio_write_8(PIC_PIC1PORT1, PIC_ICW1 | PIC_NEEDICW4); |
| 65 | 65 | ||
| 66 | /* ICW2: IRQ 8 maps to INT (IVT_IRQBASE + 8) */ |
66 | /* ICW2: IRQ 8 maps to INT (IVT_IRQBASE + 8) */ |
| 67 | outb(PIC_PIC1PORT2, IVT_IRQBASE + 8); |
67 | pio_write_8(PIC_PIC1PORT2, IVT_IRQBASE + 8); |
| 68 | 68 | ||
| 69 | /* ICW3: pic1 is known as IRQ_PIC1 */ |
69 | /* ICW3: pic1 is known as IRQ_PIC1 */ |
| 70 | outb(PIC_PIC1PORT2, IRQ_PIC1); |
70 | pio_write_8(PIC_PIC1PORT2, IRQ_PIC1); |
| 71 | 71 | ||
| 72 | /* ICW4: i8086 mode */ |
72 | /* ICW4: i8086 mode */ |
| 73 | outb(PIC_PIC1PORT2, 1); |
73 | pio_write_8(PIC_PIC1PORT2, 1); |
| 74 | 74 | ||
| 75 | /* |
75 | /* |
| 76 | * Register interrupt handler for the PIC spurious interrupt. |
76 | * Register interrupt handler for the PIC spurious interrupt. |
| 77 | */ |
77 | */ |
| 78 | exc_register(VECTOR_PIC_SPUR, "pic_spurious", (iroutine) pic_spurious); |
78 | exc_register(VECTOR_PIC_SPUR, "pic_spurious", (iroutine) pic_spurious); |
| Line 92... | Line 92... | ||
| 92 | void pic_enable_irqs(uint16_t irqmask) |
92 | void pic_enable_irqs(uint16_t irqmask) |
| 93 | { |
93 | { |
| 94 | uint8_t x; |
94 | uint8_t x; |
| 95 | 95 | ||
| 96 | if (irqmask & 0xff) { |
96 | if (irqmask & 0xff) { |
| 97 | x = inb(PIC_PIC0PORT2); |
97 | x = pio_read_8(PIC_PIC0PORT2); |
| 98 | outb(PIC_PIC0PORT2, (uint8_t) (x & (~(irqmask & 0xff)))); |
98 | pio_write_8(PIC_PIC0PORT2, (uint8_t) (x & (~(irqmask & 0xff)))); |
| 99 | } |
99 | } |
| 100 | if (irqmask >> 8) { |
100 | if (irqmask >> 8) { |
| 101 | x = inb(PIC_PIC1PORT2); |
101 | x = pio_read_8(PIC_PIC1PORT2); |
| 102 | outb(PIC_PIC1PORT2, (uint8_t) (x & (~(irqmask >> 8)))); |
102 | pio_write_8(PIC_PIC1PORT2, (uint8_t) (x & (~(irqmask >> 8)))); |
| 103 | } |
103 | } |
| 104 | } |
104 | } |
| 105 | 105 | ||
| 106 | void pic_disable_irqs(uint16_t irqmask) |
106 | void pic_disable_irqs(uint16_t irqmask) |
| 107 | { |
107 | { |
| 108 | uint8_t x; |
108 | uint8_t x; |
| 109 | 109 | ||
| 110 | if (irqmask & 0xff) { |
110 | if (irqmask & 0xff) { |
| 111 | x = inb(PIC_PIC0PORT2); |
111 | x = pio_read_8(PIC_PIC0PORT2); |
| 112 | outb(PIC_PIC0PORT2, (uint8_t) (x | (irqmask & 0xff))); |
112 | pio_write_8(PIC_PIC0PORT2, (uint8_t) (x | (irqmask & 0xff))); |
| 113 | } |
113 | } |
| 114 | if (irqmask >> 8) { |
114 | if (irqmask >> 8) { |
| 115 | x = inb(PIC_PIC1PORT2); |
115 | x = pio_read_8(PIC_PIC1PORT2); |
| 116 | outb(PIC_PIC1PORT2, (uint8_t) (x | (irqmask >> 8))); |
116 | pio_write_8(PIC_PIC1PORT2, (uint8_t) (x | (irqmask >> 8))); |
| 117 | } |
117 | } |
| 118 | } |
118 | } |
| 119 | 119 | ||
| 120 | void pic_eoi(void) |
120 | void pic_eoi(void) |
| 121 | { |
121 | { |
| 122 | outb(0x20, 0x20); |
122 | pio_write_8(0x20, 0x20); |
| 123 | outb(0xa0, 0x20); |
123 | pio_write_8(0xa0, 0x20); |
| 124 | } |
124 | } |
| 125 | 125 | ||
| 126 | void pic_spurious(int n __attribute__((unused)), istate_t *istate __attribute__((unused))) |
126 | void pic_spurious(int n __attribute__((unused)), istate_t *istate __attribute__((unused))) |
| 127 | { |
127 | { |
| 128 | #ifdef CONFIG_DEBUG |
128 | #ifdef CONFIG_DEBUG |