diff options
Diffstat (limited to 'arch/mips/lemote/lm2e/irq.c')
-rw-r--r-- | arch/mips/lemote/lm2e/irq.c | 143 |
1 files changed, 0 insertions, 143 deletions
diff --git a/arch/mips/lemote/lm2e/irq.c b/arch/mips/lemote/lm2e/irq.c deleted file mode 100644 index 1d0a09f3b832..000000000000 --- a/arch/mips/lemote/lm2e/irq.c +++ /dev/null | |||
@@ -1,143 +0,0 @@ | |||
1 | /* | ||
2 | * Copyright (C) 2007 Lemote Inc. & Insititute of Computing Technology | ||
3 | * Author: Fuxin Zhang, zhangfx@lemote.com | ||
4 | * | ||
5 | * This program is free software; you can redistribute it and/or modify it | ||
6 | * under the terms of the GNU General Public License as published by the | ||
7 | * Free Software Foundation; either version 2 of the License, or (at your | ||
8 | * option) any later version. | ||
9 | * | ||
10 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED | ||
11 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | ||
12 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN | ||
13 | * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, | ||
14 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | ||
15 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF | ||
16 | * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON | ||
17 | * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | ||
18 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF | ||
19 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | ||
20 | * | ||
21 | * You should have received a copy of the GNU General Public License along | ||
22 | * with this program; if not, write to the Free Software Foundation, Inc., | ||
23 | * 675 Mass Ave, Cambridge, MA 02139, USA. | ||
24 | * | ||
25 | */ | ||
26 | #include <linux/delay.h> | ||
27 | #include <linux/io.h> | ||
28 | #include <linux/init.h> | ||
29 | #include <linux/interrupt.h> | ||
30 | #include <linux/irq.h> | ||
31 | |||
32 | #include <asm/irq_cpu.h> | ||
33 | #include <asm/i8259.h> | ||
34 | #include <asm/mipsregs.h> | ||
35 | #include <asm/mips-boards/bonito64.h> | ||
36 | |||
37 | |||
38 | /* | ||
39 | * the first level int-handler will jump here if it is a bonito irq | ||
40 | */ | ||
41 | static void bonito_irqdispatch(void) | ||
42 | { | ||
43 | u32 int_status; | ||
44 | int i; | ||
45 | |||
46 | /* workaround the IO dma problem: let cpu looping to allow DMA finish */ | ||
47 | int_status = BONITO_INTISR; | ||
48 | if (int_status & (1 << 10)) { | ||
49 | while (int_status & (1 << 10)) { | ||
50 | udelay(1); | ||
51 | int_status = BONITO_INTISR; | ||
52 | } | ||
53 | } | ||
54 | |||
55 | /* Get pending sources, masked by current enables */ | ||
56 | int_status = BONITO_INTISR & BONITO_INTEN; | ||
57 | |||
58 | if (int_status != 0) { | ||
59 | i = __ffs(int_status); | ||
60 | int_status &= ~(1 << i); | ||
61 | do_IRQ(BONITO_IRQ_BASE + i); | ||
62 | } | ||
63 | } | ||
64 | |||
65 | static void i8259_irqdispatch(void) | ||
66 | { | ||
67 | int irq; | ||
68 | |||
69 | irq = i8259_irq(); | ||
70 | if (irq >= 0) { | ||
71 | do_IRQ(irq); | ||
72 | } else { | ||
73 | spurious_interrupt(); | ||
74 | } | ||
75 | |||
76 | } | ||
77 | |||
78 | asmlinkage void plat_irq_dispatch(void) | ||
79 | { | ||
80 | unsigned int pending = read_c0_cause() & read_c0_status() & ST0_IM; | ||
81 | |||
82 | if (pending & CAUSEF_IP7) { | ||
83 | do_IRQ(MIPS_CPU_IRQ_BASE + 7); | ||
84 | } else if (pending & CAUSEF_IP5) { | ||
85 | i8259_irqdispatch(); | ||
86 | } else if (pending & CAUSEF_IP2) { | ||
87 | bonito_irqdispatch(); | ||
88 | } else { | ||
89 | spurious_interrupt(); | ||
90 | } | ||
91 | } | ||
92 | |||
93 | static struct irqaction cascade_irqaction = { | ||
94 | .handler = no_action, | ||
95 | .name = "cascade", | ||
96 | }; | ||
97 | |||
98 | void __init arch_init_irq(void) | ||
99 | { | ||
100 | extern void bonito_irq_init(void); | ||
101 | |||
102 | /* | ||
103 | * Clear all of the interrupts while we change the able around a bit. | ||
104 | * int-handler is not on bootstrap | ||
105 | */ | ||
106 | clear_c0_status(ST0_IM | ST0_BEV); | ||
107 | local_irq_disable(); | ||
108 | |||
109 | /* most bonito irq should be level triggered */ | ||
110 | BONITO_INTEDGE = BONITO_ICU_SYSTEMERR | BONITO_ICU_MASTERERR | | ||
111 | BONITO_ICU_RETRYERR | BONITO_ICU_MBOXES; | ||
112 | BONITO_INTSTEER = 0; | ||
113 | |||
114 | /* | ||
115 | * Mask out all interrupt by writing "1" to all bit position in | ||
116 | * the interrupt reset reg. | ||
117 | */ | ||
118 | BONITO_INTENCLR = ~0; | ||
119 | |||
120 | /* init all controller | ||
121 | * 0-15 ------> i8259 interrupt | ||
122 | * 16-23 ------> mips cpu interrupt | ||
123 | * 32-63 ------> bonito irq | ||
124 | */ | ||
125 | |||
126 | /* Sets the first-level interrupt dispatcher. */ | ||
127 | mips_cpu_irq_init(); | ||
128 | init_i8259_irqs(); | ||
129 | bonito_irq_init(); | ||
130 | |||
131 | /* | ||
132 | printk("GPIODATA=%x, GPIOIE=%x\n", BONITO_GPIODATA, BONITO_GPIOIE); | ||
133 | printk("INTEN=%x, INTSET=%x, INTCLR=%x, INTISR=%x\n", | ||
134 | BONITO_INTEN, BONITO_INTENSET, | ||
135 | BONITO_INTENCLR, BONITO_INTISR); | ||
136 | */ | ||
137 | |||
138 | /* bonito irq at IP2 */ | ||
139 | setup_irq(MIPS_CPU_IRQ_BASE + 2, &cascade_irqaction); | ||
140 | /* 8259 irq at IP5 */ | ||
141 | setup_irq(MIPS_CPU_IRQ_BASE + 5, &cascade_irqaction); | ||
142 | |||
143 | } | ||