52 lines
1.4 KiB
C
52 lines
1.4 KiB
C
|
/* 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);
|