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c2f02da2 DH |
1 | /* |
2 | * (C) Copyright 2000, 2001 | |
3 | * Wolfgang Denk, DENX Software Engineering, wd@denx.de. | |
4 | * | |
5 | * (C) Copyright 2007 | |
6 | * Daniel Hellstrom, Gaisler Research, daniel@gaisler.com. | |
7 | * | |
1a459660 | 8 | * SPDX-License-Identifier: GPL-2.0+ |
c2f02da2 DH |
9 | */ |
10 | ||
11 | #include <common.h> | |
12 | ||
13 | /* Implemented by SPARC CPUs */ | |
14 | extern void cpu_wait_ticks(unsigned long ticks); | |
15 | extern unsigned long cpu_usec2ticks(unsigned long usec); | |
16 | extern unsigned long cpu_ticks2usec(unsigned long ticks); | |
17 | ||
18 | /* ------------------------------------------------------------------------- */ | |
19 | ||
20 | void wait_ticks(unsigned long ticks) | |
21 | { | |
22 | cpu_wait_ticks(ticks); | |
23 | } | |
24 | ||
25 | /* | |
26 | * This function is intended for SHORT delays only. | |
27 | */ | |
28 | unsigned long usec2ticks(unsigned long usec) | |
29 | { | |
30 | return cpu_usec2ticks(usec); | |
31 | } | |
32 | ||
33 | /* ------------------------------------------------------------------------- */ | |
34 | ||
35 | /* | |
36 | * We implement the delay by converting the delay (the number of | |
37 | * microseconds to wait) into a number of time base ticks; then we | |
38 | * watch the time base until it has incremented by that amount. | |
39 | */ | |
3eb90bad | 40 | void __udelay(unsigned long usec) |
c2f02da2 DH |
41 | { |
42 | ulong ticks = usec2ticks(usec); | |
43 | ||
44 | wait_ticks(ticks); | |
45 | } | |
46 | ||
47 | /* ------------------------------------------------------------------------- */ | |
48 | ||
49 | unsigned long ticks2usec(unsigned long ticks) | |
50 | { | |
51 | return cpu_ticks2usec(ticks); | |
52 | } | |
53 | ||
54 | /* ------------------------------------------------------------------------- */ | |
55 | ||
56 | int init_timebase(void) | |
57 | { | |
58 | ||
59 | return (0); | |
60 | } | |
61 | ||
62 | /* ------------------------------------------------------------------------- */ |