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/*
* This file is part of the libopencm3 project.
*
* Copyright (C) 2013 Frantisek Burian <BuFran@seznam.cz>
*
* This library is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef LIBOPENCM3_CM3_DWT_H
#define LIBOPENCM3_CM3_DWT_H
#include <libopencm3/cm3/common.h>
#include <libopencm3/cm3/memorymap.h>
/*****************************************************************************/
/* Register definitions */
/*****************************************************************************/
#define DWT_CTRL MMIO32(DWT_BASE + 0x00)
/* Those defined only on ARMv7 and above */
#if defined(__ARM_ARCH_7M__) || defined(__ARM_ARCH_7EM__)
#define DWT_CYCCNT MMIO32(DWT_BASE + 0x04)
#define DWT_CPICNT MMIO32(DWT_BASE + 0x08)
#define DWT_EXCCNT MMIO32(DWT_BASE + 0x0C)
#define DWT_SLEEPCNT MMIO32(DWT_BASE + 0x10)
#define DWT_LSUCNT MMIO32(DWT_BASE + 0x14)
#define DWT_FOLDCNT MMIO32(DWT_BASE + 0x18)
#endif /* defined(__ARM_ARCH_7M__) || defined(__ARM_ARCH_7EM__) */
#define DWT_PCSR MMIO32(DWT_BASE + 0x1C)
#define DWT_COMP(n) MMIO32(DWT_BASE + 0x20 + (n) * 16)
#define DWT_MASK(n) MMIO32(DWT_BASE + 0x24 + (n) * 16)
#define DWT_FUNCTION(n) MMIO32(DWT_BASE + 0x28 + (n) * 16)
/*****************************************************************************/
/* Register values */
/*****************************************************************************/
/* --- DWT_CTRL values ---------------------------------------------------- */
#define DWT_CTRL_NUMCOMP_SHIFT 28
#define DWT_CTRL_NUMCOMP (0x0F << DWT_CTRL_NUMCOMP_SHIFT)
/* Those defined only on ARMv7 and above */
#if defined(__ARM_ARCH_7M__) || defined(__ARM_ARCH_7EM__)
#define DWT_CTRL_NOTRCPKT (1 << 27)
#define DWT_CTRL_NOEXTTRIG (1 << 26)
#define DWT_CTRL_NOCYCCNT (1 << 25)
#define DWT_CTRL_NOPRFCCNT (1 << 24)
#define DWT_CTRL_CYCEVTENA (1 << 22)
#define DWT_CTRL_FOLDEVTENA (1 << 21)
#define DWT_CTRL_LSUEVTENA (1 << 20)
#define DWT_CTRL_SLEEPEVTENA (1 << 19)
#define DWT_CTRL_EXCEVTENA (1 << 18)
#define DWT_CTRL_CPIEVTENA (1 << 17)
#define DWT_CTRL_EXCTRCENA (1 << 16)
#define DWT_CTRL_PCSAMPLENA (1 << 12)
#define DWT_CTRL_SYNCTAP_SHIFT 10
#define DWT_CTRL_SYNCTAP (3 << DWT_CTRL_SYNCTAP_SHIFT)
#define DWT_CTRL_SYNCTAP_DISABLED (0 << DWT_CTRL_SYNCTAP_SHIFT)
#define DWT_CTRL_SYNCTAP_BIT24 (1 << DWT_CTRL_SYNCTAP_SHIFT)
#define DWT_CTRL_SYNCTAP_BIT26 (2 << DWT_CTRL_SYNCTAP_SHIFT)
#define DWT_CTRL_SYNCTAP_BIT28 (3 << DWT_CTRL_SYNCTAP_SHIFT)
#define DWT_CTRL_CYCTAP (1 << 9)
#define DWT_CTRL_POSTCNT_SHIFT 5
#define DWT_CTRL_POSTCNT (0x0F << DWT_CTRL_POSTCNT_SHIFT)
#define DWT_CTRL_POSTPRESET_SHIFT 1
#define DWT_CTRL_POSTPRESET (0x0F << DWT_CTRL_POSTPRESET_SHIFT)
#define DWT_CTRL_CYCCNTENA (1 << 0)
#endif /* defined(__ARM_ARCH_7M__) || defined(__ARM_ARCH_7EM__) */
/* --- DWT_MASK(x) values -------------------------------------------------- */
#define DWT_MASKx_MASK 0x0F
/* --- DWT_FUNCTION(x) values ---------------------------------------------- */
#define DWT_FUNCTIONx_MATCHED (1 << 24)
/* Those defined only on ARMv7 and above */
#if defined(__ARM_ARCH_7M__) || defined(__ARM_ARCH_7EM__)
#define DWT_FUNCTIONx_DATAVADDR1_SHIFT 16
#define DWT_FUNCTIONx_DATAVADDR1 (15 << DWT_FUNCTIONx_DATAVADDR1_SHIFT)
#define DWT_FUNCTIONx_DATAVADDR0_SHIFT 12
#define DWT_FUNCTIONx_DATAVADDR0 (15 << DWT_FUNCTIONx_DATAVADDR0_SHIFT)
#define DWT_FUNCTIONx_DATAVSIZE_SHIFT 10
#define DWT_FUNCTIONx_DATAVSIZE (3 << DWT_FUNCTIONx_DATAVSIZE_SHIFT)
#define DWT_FUNCTIONx_DATAVSIZE_BYTE (0 << DWT_FUNCTIONx_DATAVSIZE_SHIFT)
#define DWT_FUNCTIONx_DATAVSIZE_HALF (1 << DWT_FUNCTIONx_DATAVSIZE_SHIFT)
#define DWT_FUNCTIONx_DATAVSIZE_WORD (2 << DWT_FUNCTIONx_DATAVSIZE_SHIFT)
#define DWT_FUNCTIONx_LNK1ENA (1 << 9)
#define DWT_FUNCTIONx_DATAVMATCH (1 << 8)
#define DWT_FUNCTIONx_CYCMATCH (1 << 7)
#define DWT_FUNCTIONx_EMITRANGE (1 << 5)
#endif /* defined(__ARM_ARCH_7M__) || defined(__ARM_ARCH_7EM__) */
#define DWT_FUNCTIONx_FUNCTION 15
#define DWT_FUNCTIONx_FUNCTION_DISABLED 0
/* Those defined only on ARMv6 */
#if defined(__ARM_ARCH_6M__)
#define DWT_FUNCTIONx_FUNCTION_PCWATCH 4
#define DWT_FUNCTIONx_FUNCTION_DWATCH_R 5
#define DWT_FUNCTIONx_FUNCTION_DWATCH_W 6
#define DWT_FUNCTIONx_FUNCTION_DWATCH_RW 7
#endif /* defined(__ARM_ARCH_6M__)*/
/*****************************************************************************/
/* API definitions */
/*****************************************************************************/
/*****************************************************************************/
/* API Functions */
/*****************************************************************************/
BEGIN_DECLS
bool dwt_enable_cycle_counter(void);
uint32_t dwt_read_cycle_counter(void);
END_DECLS
#endif /* LIBOPENCM3_CM3_DWT_H */
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