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 */ profile_init(void)17static __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); 52