diff options
Diffstat (limited to 'arch/ppc/syslib/ppc403_pic.c')
-rw-r--r-- | arch/ppc/syslib/ppc403_pic.c | 125 |
1 files changed, 0 insertions, 125 deletions
diff --git a/arch/ppc/syslib/ppc403_pic.c b/arch/ppc/syslib/ppc403_pic.c deleted file mode 100644 index c3b7b8bfbcfe..000000000000 --- a/arch/ppc/syslib/ppc403_pic.c +++ /dev/null | |||
@@ -1,125 +0,0 @@ | |||
1 | /* | ||
2 | * | ||
3 | * Copyright (c) 1999 Grant Erickson <grant@lcse.umn.edu> | ||
4 | * | ||
5 | * Module name: ppc403_pic.c | ||
6 | * | ||
7 | * Description: | ||
8 | * Interrupt controller driver for PowerPC 403-based processors. | ||
9 | */ | ||
10 | |||
11 | /* | ||
12 | * The PowerPC 403 cores' Asynchronous Interrupt Controller (AIC) has | ||
13 | * 32 possible interrupts, a majority of which are not implemented on | ||
14 | * all cores. There are six configurable, external interrupt pins and | ||
15 | * there are eight internal interrupts for the on-chip serial port | ||
16 | * (SPU), DMA controller, and JTAG controller. | ||
17 | * | ||
18 | */ | ||
19 | |||
20 | #include <linux/init.h> | ||
21 | #include <linux/sched.h> | ||
22 | #include <linux/signal.h> | ||
23 | #include <linux/stddef.h> | ||
24 | |||
25 | #include <asm/processor.h> | ||
26 | #include <asm/system.h> | ||
27 | #include <asm/irq.h> | ||
28 | #include <asm/ppc4xx_pic.h> | ||
29 | #include <asm/machdep.h> | ||
30 | |||
31 | /* Function Prototypes */ | ||
32 | |||
33 | static void ppc403_aic_enable(unsigned int irq); | ||
34 | static void ppc403_aic_disable(unsigned int irq); | ||
35 | static void ppc403_aic_disable_and_ack(unsigned int irq); | ||
36 | |||
37 | static struct hw_interrupt_type ppc403_aic = { | ||
38 | .typename = "403GC AIC", | ||
39 | .enable = ppc403_aic_enable, | ||
40 | .disable = ppc403_aic_disable, | ||
41 | .ack = ppc403_aic_disable_and_ack, | ||
42 | }; | ||
43 | |||
44 | int | ||
45 | ppc403_pic_get_irq(void) | ||
46 | { | ||
47 | int irq; | ||
48 | unsigned long bits; | ||
49 | |||
50 | /* | ||
51 | * Only report the status of those interrupts that are actually | ||
52 | * enabled. | ||
53 | */ | ||
54 | |||
55 | bits = mfdcr(DCRN_EXISR) & mfdcr(DCRN_EXIER); | ||
56 | |||
57 | /* | ||
58 | * Walk through the interrupts from highest priority to lowest, and | ||
59 | * report the first pending interrupt found. | ||
60 | * We want PPC, not C bit numbering, so just subtract the ffs() | ||
61 | * result from 32. | ||
62 | */ | ||
63 | irq = 32 - ffs(bits); | ||
64 | |||
65 | if (irq == NR_AIC_IRQS) | ||
66 | irq = -1; | ||
67 | |||
68 | return (irq); | ||
69 | } | ||
70 | |||
71 | static void | ||
72 | ppc403_aic_enable(unsigned int irq) | ||
73 | { | ||
74 | int bit, word; | ||
75 | |||
76 | bit = irq & 0x1f; | ||
77 | word = irq >> 5; | ||
78 | |||
79 | ppc_cached_irq_mask[word] |= (1 << (31 - bit)); | ||
80 | mtdcr(DCRN_EXIER, ppc_cached_irq_mask[word]); | ||
81 | } | ||
82 | |||
83 | static void | ||
84 | ppc403_aic_disable(unsigned int irq) | ||
85 | { | ||
86 | int bit, word; | ||
87 | |||
88 | bit = irq & 0x1f; | ||
89 | word = irq >> 5; | ||
90 | |||
91 | ppc_cached_irq_mask[word] &= ~(1 << (31 - bit)); | ||
92 | mtdcr(DCRN_EXIER, ppc_cached_irq_mask[word]); | ||
93 | } | ||
94 | |||
95 | static void | ||
96 | ppc403_aic_disable_and_ack(unsigned int irq) | ||
97 | { | ||
98 | int bit, word; | ||
99 | |||
100 | bit = irq & 0x1f; | ||
101 | word = irq >> 5; | ||
102 | |||
103 | ppc_cached_irq_mask[word] &= ~(1 << (31 - bit)); | ||
104 | mtdcr(DCRN_EXIER, ppc_cached_irq_mask[word]); | ||
105 | mtdcr(DCRN_EXISR, (1 << (31 - bit))); | ||
106 | } | ||
107 | |||
108 | void __init | ||
109 | ppc4xx_pic_init(void) | ||
110 | { | ||
111 | int i; | ||
112 | |||
113 | /* | ||
114 | * Disable all external interrupts until they are | ||
115 | * explicitly requested. | ||
116 | */ | ||
117 | ppc_cached_irq_mask[0] = 0; | ||
118 | |||
119 | mtdcr(DCRN_EXIER, ppc_cached_irq_mask[0]); | ||
120 | |||
121 | ppc_md.get_irq = ppc403_pic_get_irq; | ||
122 | |||
123 | for (i = 0; i < NR_IRQS; i++) | ||
124 | irq_desc[i].chip = &ppc403_aic; | ||
125 | } | ||