16b4b8cf54
Expose most DWT registers via Tcl; there are a few more, but those are mostly for profiling along with the ITM. Having this set available enables operations which aren't possible with just the standard watchpoint operations. The cycle counter may be interesting. Turn it on after reset by setting the LSB of the dwt_ctrl register, and it counts CPU clocks. You can program the comparator 0 watchpoint to trigger on a given cycle count, rather than a data address. Likewise, comparator 1 may be able to match data values given address matches from one or two other comparators. (Not all hardware supports this capability though; try it. That is something the standard watchpoint methods should eventually handle, for the single address case.) Minor cleanup: remove needless functional indirection for exposing the v7m architctural registers. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
168 lines
5.3 KiB
C
168 lines
5.3 KiB
C
/***************************************************************************
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* Copyright (C) 2005 by Dominic Rath *
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* Dominic.Rath@gmx.de *
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* *
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* Copyright (C) 2006 by Magnus Lundin *
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* lundin@mlu.mine.nu *
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* *
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* Copyright (C) 2008 by Spencer Oliver *
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* spen@spen-soft.co.uk *
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU General Public License for more details. *
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* *
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* You should have received a copy of the GNU General Public License *
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* along with this program; if not, write to the *
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* Free Software Foundation, Inc., *
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* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
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***************************************************************************/
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#ifndef CORTEX_M3_H
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#define CORTEX_M3_H
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#include "register.h"
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#include "target.h"
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#include "armv7m.h"
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#define CORTEX_M3_COMMON_MAGIC 0x1A451A45
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#define SYSTEM_CONTROL_BASE 0x400FE000
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#define CPUID 0xE000ED00
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/* Debug Control Block */
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#define DCB_DHCSR 0xE000EDF0
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#define DCB_DCRSR 0xE000EDF4
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#define DCB_DCRDR 0xE000EDF8
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#define DCB_DEMCR 0xE000EDFC
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#define DCRSR_WnR (1 << 16)
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#define DWT_CTRL 0xE0001000
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#define DWT_CYCCNT 0xE0001004
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#define DWT_COMP0 0xE0001020
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#define DWT_MASK0 0xE0001024
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#define DWT_FUNCTION0 0xE0001028
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#define FP_CTRL 0xE0002000
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#define FP_REMAP 0xE0002004
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#define FP_COMP0 0xE0002008
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#define FP_COMP1 0xE000200C
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#define FP_COMP2 0xE0002010
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#define FP_COMP3 0xE0002014
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#define FP_COMP4 0xE0002018
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#define FP_COMP5 0xE000201C
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#define FP_COMP6 0xE0002020
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#define FP_COMP7 0xE0002024
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/* DCB_DHCSR bit and field definitions */
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#define DBGKEY (0xA05F << 16)
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#define C_DEBUGEN (1 << 0)
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#define C_HALT (1 << 1)
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#define C_STEP (1 << 2)
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#define C_MASKINTS (1 << 3)
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#define S_REGRDY (1 << 16)
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#define S_HALT (1 << 17)
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#define S_SLEEP (1 << 18)
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#define S_LOCKUP (1 << 19)
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#define S_RETIRE_ST (1 << 24)
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#define S_RESET_ST (1 << 25)
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/* DCB_DEMCR bit and field definitions */
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#define TRCENA (1 << 24)
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#define VC_HARDERR (1 << 10)
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#define VC_INTERR (1 << 9)
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#define VC_BUSERR (1 << 8)
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#define VC_STATERR (1 << 7)
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#define VC_CHKERR (1 << 6)
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#define VC_NOCPERR (1 << 5)
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#define VC_MMERR (1 << 4)
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#define VC_CORERESET (1 << 0)
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#define NVIC_ICTR 0xE000E004
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#define NVIC_ISE0 0xE000E100
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#define NVIC_ICSR 0xE000ED04
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#define NVIC_AIRCR 0xE000ED0C
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#define NVIC_SHCSR 0xE000ED24
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#define NVIC_CFSR 0xE000ED28
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#define NVIC_MMFSRb 0xE000ED28
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#define NVIC_BFSRb 0xE000ED29
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#define NVIC_USFSRh 0xE000ED2A
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#define NVIC_HFSR 0xE000ED2C
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#define NVIC_DFSR 0xE000ED30
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#define NVIC_MMFAR 0xE000ED34
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#define NVIC_BFAR 0xE000ED38
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/* NVIC_AIRCR bits */
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#define AIRCR_VECTKEY (0x5FA << 16)
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#define AIRCR_SYSRESETREQ (1 << 2)
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#define AIRCR_VECTCLRACTIVE (1 << 1)
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#define AIRCR_VECTRESET (1 << 0)
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/* NVIC_SHCSR bits */
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#define SHCSR_BUSFAULTENA (1 << 17)
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/* NVIC_DFSR bits */
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#define DFSR_HALTED 1
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#define DFSR_BKPT 2
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#define DFSR_DWTTRAP 4
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#define DFSR_VCATCH 8
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#define FPCR_CODE 0
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#define FPCR_LITERAL 1
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#define FPCR_REPLACE_REMAP (0 << 30)
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#define FPCR_REPLACE_BKPT_LOW (1 << 30)
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#define FPCR_REPLACE_BKPT_HIGH (2 << 30)
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#define FPCR_REPLACE_BKPT_BOTH (3 << 30)
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typedef struct cortex_m3_fp_comparator_s
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{
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int used;
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int type;
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uint32_t fpcr_value;
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uint32_t fpcr_address;
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} cortex_m3_fp_comparator_t;
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typedef struct cortex_m3_dwt_comparator_s
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{
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int used;
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uint32_t comp;
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uint32_t mask;
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uint32_t function;
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uint32_t dwt_comparator_address;
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} cortex_m3_dwt_comparator_t;
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typedef struct cortex_m3_common_s
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{
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int common_magic;
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arm_jtag_t jtag_info;
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/* Context information */
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uint32_t dcb_dhcsr;
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uint32_t nvic_dfsr; /* Debug Fault Status Register - shows reason for debug halt */
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uint32_t nvic_icsr; /* Interrupt Control State Register - shows active and pending IRQ */
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/* Flash Patch and Breakpoint (FPB) */
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int fp_num_lit;
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int fp_num_code;
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int fp_code_available;
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int fpb_enabled;
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int auto_bp_type;
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cortex_m3_fp_comparator_t *fp_comparator_list;
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/* Data Watchpoint and Trace (DWT) */
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int dwt_num_comp;
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int dwt_comp_available;
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cortex_m3_dwt_comparator_t *dwt_comparator_list;
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struct reg_cache_s *dwt_cache;
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armv7m_common_t armv7m;
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void *arch_info;
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} cortex_m3_common_t;
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#endif /* CORTEX_M3_H */
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