David Howells | b920de1 | 2008-02-08 04:19:31 -0800 | [diff] [blame] | 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); |