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b920de1b DH |
1 | /* MN10300 Profiling setup |
2 | * | |
3 | * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved. | |
4 | * Written by David Howells (dhowells@redhat.com) | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU General Public Licence | |
8 | * as published by the Free Software Foundation; either version | |
9 | * 2 of the Licence, or (at your option) any later version. | |
10 | */ | |
11 | ||
12 | /* | |
13 | * initialise the profiling if enabled | |
14 | * - using with gdbstub will give anomalous results | |
15 | * - can't be used with gdbstub if running at IRQ priority 0 | |
16 | */ | |
17 | static __init int profile_init(void) | |
18 | { | |
19 | u16 tmp; | |
20 | ||
21 | if (!prof_buffer) | |
22 | return 0; | |
23 | ||
24 | /* use timer 11 to drive the profiling interrupts */ | |
25 | set_intr_stub(EXCEP_IRQ_LEVEL0, profile_handler); | |
26 | ||
27 | /* set IRQ priority at which to run */ | |
28 | set_intr_level(TM11IRQ, GxICR_LEVEL_0); | |
29 | ||
30 | /* set up timer 11 | |
31 | * - source: (IOCLK 33MHz)*2 = 66MHz | |
32 | * - frequency: (33330000*2) / 8 / 20625 = 202Hz | |
33 | */ | |
34 | TM11BR = 20625 - 1; | |
35 | TM11MD = TM8MD_SRC_IOCLK_8; | |
36 | TM11MD |= TM8MD_INIT_COUNTER; | |
37 | TM11MD &= ~TM8MD_INIT_COUNTER; | |
38 | TM11MD |= TM8MD_COUNT_ENABLE; | |
39 | ||
40 | TM11ICR |= GxICR_ENABLE; | |
41 | tmp = TM11ICR; | |
42 | ||
43 | printk(KERN_INFO "Profiling initiated on timer 11, priority 0, %uHz\n", | |
44 | mn10300_ioclk / 8 / (TM11BR + 1)); | |
45 | printk(KERN_INFO "Profile histogram stored %p-%p\n", | |
46 | prof_buffer, (u8 *)(prof_buffer + prof_len) - 1); | |
47 | ||
48 | return 0; | |
49 | } | |
50 | ||
51 | __initcall(profile_init); |