]>
Commit | Line | Data |
---|---|---|
c2f02da2 DH |
1 | /* |
2 | * (C) Copyright 2000-2002 | |
3 | * Wolfgang Denk, DENX Software Engineering, wd@denx.de. | |
4 | * | |
5 | * (C) Copyright 2003 | |
6 | * Gleb Natapov <gnatapov@mrv.com> | |
7 | * | |
8 | * (C) Copyright 2007 | |
9 | * Daniel Hellstrom, Gaisler Research, daniel@gaisler.com. | |
10 | * | |
1a459660 | 11 | * SPDX-License-Identifier: GPL-2.0+ |
c2f02da2 DH |
12 | */ |
13 | ||
14 | #include <common.h> | |
15 | #include <asm/processor.h> | |
16 | #include <asm/irq.h> | |
17 | ||
18 | /* Implemented by SPARC CPUs */ | |
19 | extern int interrupt_init_cpu(void); | |
20 | extern void timer_interrupt_cpu(void *arg); | |
21 | extern int timer_interrupt_init_cpu(void); | |
22 | ||
23 | int intLock(void) | |
24 | { | |
25 | unsigned int pil; | |
26 | ||
27 | pil = get_pil(); | |
28 | ||
29 | /* set PIL to 15 ==> no pending interrupts will interrupt CPU */ | |
30 | set_pil(15); | |
31 | ||
32 | return pil; | |
33 | } | |
34 | ||
35 | void intUnlock(int oldLevel) | |
36 | { | |
37 | set_pil(oldLevel); | |
38 | } | |
39 | ||
40 | void enable_interrupts(void) | |
41 | { | |
42 | set_pil(0); /* enable all interrupts */ | |
43 | } | |
44 | ||
45 | int disable_interrupts(void) | |
46 | { | |
47 | return intLock(); | |
48 | } | |
49 | ||
50 | int interrupt_init(void) | |
51 | { | |
52 | int ret; | |
53 | ||
54 | /* call cpu specific function from $(CPU)/interrupts.c */ | |
55 | ret = interrupt_init_cpu(); | |
56 | ||
57 | /* enable global interrupts */ | |
58 | enable_interrupts(); | |
59 | ||
60 | return ret; | |
61 | } | |
62 | ||
63 | /* timer interrupt/overflow counter */ | |
64 | static volatile ulong timestamp = 0; | |
65 | ||
66 | /* regs can not be used here! regs is actually the pointer given in | |
67 | * irq_install_handler | |
68 | */ | |
69 | void timer_interrupt(struct pt_regs *regs) | |
70 | { | |
71 | /* call cpu specific function from $(CPU)/interrupts.c */ | |
72 | timer_interrupt_cpu((void *)regs); | |
73 | ||
74 | timestamp++; | |
75 | } | |
76 | ||
c2f02da2 DH |
77 | ulong get_timer(ulong base) |
78 | { | |
79 | return (timestamp - base); | |
80 | } | |
81 | ||
c2f02da2 DH |
82 | void timer_interrupt_init(void) |
83 | { | |
84 | int irq; | |
85 | ||
4769be21 | 86 | timestamp = 0; |
c2f02da2 DH |
87 | |
88 | irq = timer_interrupt_init_cpu(); | |
89 | ||
90 | if (irq < 0) { | |
91 | /* cpu specific code handled the interrupt registration it self */ | |
92 | return; | |
93 | } | |
94 | /* register interrupt handler for timer */ | |
95 | irq_install_handler(irq, (void (*)(void *))timer_interrupt, NULL); | |
96 | } |