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76316a31 MS |
1 | /* |
2 | * (C) Copyright 2007 Michal Simek | |
3 | * | |
4 | * Michal SIMEK <monstr@monstr.eu> | |
5 | * | |
6 | * See file CREDITS for list of people who contributed to this | |
7 | * project. | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or | |
10 | * modify it under the terms of the GNU General Public License as | |
11 | * published by the Free Software Foundation; either version 2 of | |
12 | * the License, or (at your option) any later version. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | * GNU General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License | |
20 | * along with this program; if not, write to the Free Software | |
21 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, | |
22 | * MA 02111-1307 USA | |
23 | */ | |
24 | ||
25 | #include <common.h> | |
26 | #include <asm/microblaze_timer.h> | |
42efed61 | 27 | #include <asm/microblaze_intc.h> |
76316a31 MS |
28 | |
29 | volatile int timestamp = 0; | |
30 | ||
6d0f6bcf | 31 | #ifdef CONFIG_SYS_TIMER_0 |
76316a31 MS |
32 | ulong get_timer (ulong base) |
33 | { | |
34 | return (timestamp - base); | |
35 | } | |
1c1100d2 MS |
36 | #else |
37 | ulong get_timer (ulong base) | |
38 | { | |
39 | return (timestamp++ - base); | |
40 | } | |
41 | #endif | |
76316a31 | 42 | |
779bf42c MS |
43 | #ifdef CONFIG_SYS_TIMER_0 |
44 | void __udelay(unsigned long usec) | |
45 | { | |
46 | int i; | |
47 | ||
48 | i = get_timer(0); | |
49 | while ((get_timer(0) - i) < (usec / 1000)) | |
50 | ; | |
51 | } | |
52 | #else | |
53 | void __udelay(unsigned long usec) | |
54 | { | |
55 | unsigned int i; | |
56 | ||
57 | for (i = 0; i < (usec * CONFIG_XILINX_CLOCK_FREQ / 10000000); i++) | |
58 | ; | |
59 | } | |
60 | #endif | |
61 | ||
6d0f6bcf JCPV |
62 | #ifdef CONFIG_SYS_TIMER_0 |
63 | microblaze_timer_t *tmr = (microblaze_timer_t *) (CONFIG_SYS_TIMER_0_ADDR); | |
76316a31 MS |
64 | |
65 | void timer_isr (void *arg) | |
66 | { | |
67 | timestamp++; | |
68 | tmr->control = tmr->control | TIMER_INTERRUPT; | |
69 | } | |
70 | ||
5bbcb6cf | 71 | int timer_init (void) |
76316a31 | 72 | { |
6d0f6bcf | 73 | tmr->loadreg = CONFIG_SYS_TIMER_0_PRELOAD; |
76316a31 MS |
74 | tmr->control = TIMER_INTERRUPT | TIMER_RESET; |
75 | tmr->control = | |
76 | TIMER_ENABLE | TIMER_ENABLE_INTR | TIMER_RELOAD | TIMER_DOWN_COUNT; | |
4769be21 | 77 | timestamp = 0; |
6d0f6bcf | 78 | install_interrupt_handler (CONFIG_SYS_TIMER_0_IRQ, timer_isr, (void *)tmr); |
5bbcb6cf | 79 | return 0; |
76316a31 MS |
80 | } |
81 | #endif | |
b9f0b730 SL |
82 | |
83 | /* | |
84 | * This function is derived from PowerPC code (read timebase as long long). | |
85 | * On Microblaze it just returns the timer value. | |
86 | */ | |
87 | unsigned long long get_ticks(void) | |
88 | { | |
89 | return get_timer(0); | |
90 | } | |
91 | ||
92 | /* | |
93 | * This function is derived from PowerPC code (timebase clock frequency). | |
94 | * On Microblaze it returns the number of timer ticks per second. | |
95 | */ | |
96 | ulong get_tbclk(void) | |
97 | { | |
98 | return CONFIG_SYS_HZ; | |
99 | } |