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