diff options
Diffstat (limited to 'arch/mips/gt64120/common/time.c')
-rw-r--r-- | arch/mips/gt64120/common/time.c | 101 |
1 files changed, 0 insertions, 101 deletions
diff --git a/arch/mips/gt64120/common/time.c b/arch/mips/gt64120/common/time.c deleted file mode 100644 index c47eeb768192..000000000000 --- a/arch/mips/gt64120/common/time.c +++ /dev/null | |||
@@ -1,101 +0,0 @@ | |||
1 | /* | ||
2 | * This program is free software; you can redistribute it and/or modify it | ||
3 | * under the terms of the GNU General Public License as published by the | ||
4 | * Free Software Foundation; either version 2 of the License, or (at your | ||
5 | * option) any later version. | ||
6 | * | ||
7 | * Galileo Technology chip interrupt handler | ||
8 | */ | ||
9 | #include <linux/interrupt.h> | ||
10 | #include <linux/kernel.h> | ||
11 | #include <linux/sched.h> | ||
12 | #include <linux/kernel_stat.h> | ||
13 | #include <asm/irq_regs.h> | ||
14 | #include <asm/gt64120.h> | ||
15 | |||
16 | /* | ||
17 | * These are interrupt handlers for the GT on-chip interrupts. They all come | ||
18 | * in to the MIPS on a single interrupt line, and have to be handled and ack'ed | ||
19 | * differently than other MIPS interrupts. | ||
20 | */ | ||
21 | |||
22 | static irqreturn_t gt64120_irq(int irq, void *dev_id) | ||
23 | { | ||
24 | unsigned int irq_src, int_high_src, irq_src_mask, int_high_src_mask; | ||
25 | int handled = 0; | ||
26 | |||
27 | irq_src = GT_READ(GT_INTRCAUSE_OFS); | ||
28 | irq_src_mask = GT_READ(GT_INTRMASK_OFS); | ||
29 | int_high_src = GT_READ(GT_HINTRCAUSE_OFS); | ||
30 | int_high_src_mask = GT_READ(GT_HINTRMASK_OFS); | ||
31 | irq_src = irq_src & irq_src_mask; | ||
32 | int_high_src = int_high_src & int_high_src_mask; | ||
33 | |||
34 | if (irq_src & 0x00000800) { /* Check for timer interrupt */ | ||
35 | handled = 1; | ||
36 | irq_src &= ~0x00000800; | ||
37 | do_timer(1); | ||
38 | #ifndef CONFIG_SMP | ||
39 | update_process_times(user_mode(get_irq_regs())); | ||
40 | #endif | ||
41 | } | ||
42 | |||
43 | GT_WRITE(GT_INTRCAUSE_OFS, 0); | ||
44 | GT_WRITE(GT_HINTRCAUSE_OFS, 0); | ||
45 | |||
46 | return IRQ_HANDLED; | ||
47 | } | ||
48 | |||
49 | /* | ||
50 | * Initializes timer using galileo's built in timer. | ||
51 | */ | ||
52 | #ifdef CONFIG_SYSCLK_100 | ||
53 | #define Sys_clock (100 * 1000000) // 100 MHz | ||
54 | #endif | ||
55 | #ifdef CONFIG_SYSCLK_83 | ||
56 | #define Sys_clock (83.333 * 1000000) // 83.333 MHz | ||
57 | #endif | ||
58 | #ifdef CONFIG_SYSCLK_75 | ||
59 | #define Sys_clock (75 * 1000000) // 75 MHz | ||
60 | #endif | ||
61 | |||
62 | /* | ||
63 | * This will ignore the standard MIPS timer interrupt handler that is passed in | ||
64 | * as *irq (=irq0 in ../kernel/time.c). We will do our own timer interrupt | ||
65 | * handling. | ||
66 | */ | ||
67 | void __init plat_timer_setup(struct irqaction *irq) | ||
68 | { | ||
69 | static struct irqaction timer; | ||
70 | |||
71 | /* Disable timer first */ | ||
72 | GT_WRITE(GT_TC_CONTROL_OFS, 0); | ||
73 | /* Load timer value for 100 Hz */ | ||
74 | GT_WRITE(GT_TC3_OFS, Sys_clock / HZ); | ||
75 | |||
76 | /* | ||
77 | * Create the IRQ structure entry for the timer. Since we're too early | ||
78 | * in the boot process to use the "request_irq()" call, we'll hard-code | ||
79 | * the values to the correct interrupt line. | ||
80 | */ | ||
81 | timer.handler = gt64120_irq; | ||
82 | timer.flags = IRQF_SHARED | IRQF_DISABLED; | ||
83 | timer.name = "timer"; | ||
84 | timer.dev_id = NULL; | ||
85 | timer.next = NULL; | ||
86 | timer.mask = CPU_MASK_NONE; | ||
87 | irq_desc[GT_TIMER].action = &timer; | ||
88 | |||
89 | enable_irq(GT_TIMER); | ||
90 | |||
91 | /* Enable timer ints */ | ||
92 | GT_WRITE(GT_TC_CONTROL_OFS, 0xc0); | ||
93 | /* clear Cause register first */ | ||
94 | GT_WRITE(GT_INTRCAUSE_OFS, 0x0); | ||
95 | /* Unmask timer int */ | ||
96 | GT_WRITE(GT_INTRMASK_OFS, 0x800); | ||
97 | /* Clear High int register */ | ||
98 | GT_WRITE(GT_HINTRCAUSE_OFS, 0x0); | ||
99 | /* Mask All interrupts at High cause interrupt */ | ||
100 | GT_WRITE(GT_HINTRMASK_OFS, 0x0); | ||
101 | } | ||