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/* MN10300 Profiling setup
*
* Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
* Written by David Howells (dhowells@redhat.com)
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public Licence
* as published by the Free Software Foundation; either version
* 2 of the Licence, or (at your option) any later version.
*/
/*
* initialise the profiling if enabled
* - using with gdbstub will give anomalous results
* - can't be used with gdbstub if running at IRQ priority 0
*/
static __init int profile_init(void)
{
u16 tmp;
if (!prof_buffer)
return 0;
/* use timer 11 to drive the profiling interrupts */
set_intr_stub(EXCEP_IRQ_LEVEL0, profile_handler);
/* set IRQ priority at which to run */
set_intr_level(TM11IRQ, GxICR_LEVEL_0);
/* set up timer 11
* - source: (IOCLK 33MHz)*2 = 66MHz
* - frequency: (33330000*2) / 8 / 20625 = 202Hz
*/
TM11BR = 20625 - 1;
TM11MD = TM8MD_SRC_IOCLK_8;
TM11MD |= TM8MD_INIT_COUNTER;
TM11MD &= ~TM8MD_INIT_COUNTER;
TM11MD |= TM8MD_COUNT_ENABLE;
TM11ICR |= GxICR_ENABLE;
tmp = TM11ICR;
printk(KERN_INFO "Profiling initiated on timer 11, priority 0, %uHz\n",
mn10300_ioclk / 8 / (TM11BR + 1));
printk(KERN_INFO "Profile histogram stored %p-%p\n",
prof_buffer, (u8 *)(prof_buffer + prof_len) - 1);
return 0;
}
__initcall(profile_init);
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