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freebsd-dev/sys/arm/include/sysreg.h
Zbigniew Bodek 595f8a5905 Introduce support for HW watchpoints and single stepping for ARMv6/v7 
Allows for using hardware watchpoints for 1, 2, 4, 8 byte long addresses.
The default configuration of watchpoint is RW but code allows to select
RO or WO and X.
Since debugging registers are per-CPU (CP14) the watchpoint is set on
the CPU that was lucky (or not) to enter DDB.

HW breakpoints are used to perform single step in KDB.
When HW breakpoint is enabled all watchpoints are temporary disabled
to avoid recursive abort on both watchpoint and breakpoint.
In case of branch, the breakpoint is set to both - next instruction
and possible branch address. This requires at least 2 breakpoints
supported in the CPU however this is a must for ARMv6/v7 CPUs.

Reviewed by:   imp
Submitted by:  Zbigniew Bodek <zbb@semihalf.com>
Obtained from: Semihalf
Sponsored by:  Juniper Networks Inc.
Differential Revision: https://reviews.freebsd.org/D4037
2016-01-25 18:02:28 +00:00

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/*-
* Copyright 2014 Svatopluk Kraus <onwahe@gmail.com>
* Copyright 2014 Michal Meloun <meloun@miracle.cz>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
/*
* Macros to make working with the System Control Registers simpler.
*
* Note that when register r0 is hard-coded in these definitions it means the
* cp15 operation neither reads nor writes the register, and r0 is used only
* because some syntatically-valid register name has to appear at that point to
* keep the asm parser happy.
*/
#ifndef MACHINE_SYSREG_H
#define MACHINE_SYSREG_H
#include <machine/acle-compat.h>
/*
* CP14 registers
*/
#if __ARM_ARCH >= 6
#define CP14_DBGDIDR(rr) p14, 0, rr, c0, c0, 0 /* Debug ID Register */
#define CP14_DBGDSCRext_V6(rr) p14, 0, rr, c0, c1, 0 /* Debug Status and Ctrl Register v6 */
#define CP14_DBGDSCRext_V7(rr) p14, 0, rr, c0, c2, 2 /* Debug Status and Ctrl Register v7 */
#define CP14_DBGVCR(rr) p14, 0, rr, c0, c7, 0 /* Vector Catch Register */
#define CP14_DBGOSLAR(rr) p14, 0, rr, c1, c0, 4 /* OS Lock Access Register */
#define CP14_DBGOSLSR(rr) p14, 0, rr, c1, c1, 4 /* OS Lock Status Register */
#define CP14_DBGOSDLR(rr) p14, 0, rr, c1, c3, 4 /* OS Double Lock Register */
#define CP14_DBGPRSR(rr) p14, 0, rr, c1, c5, 4 /* Device Powerdown and Reset Status */
#define CP14_DBGDSCRint(rr) CP14_DBGDSCRext_V6(rr) /* Debug Status and Ctrl internal view */
#endif
/*
* CP15 C0 registers
*/
#define CP15_MIDR(rr) p15, 0, rr, c0, c0, 0 /* Main ID Register */
#define CP15_CTR(rr) p15, 0, rr, c0, c0, 1 /* Cache Type Register */
#define CP15_TCMTR(rr) p15, 0, rr, c0, c0, 2 /* TCM Type Register */
#define CP15_TLBTR(rr) p15, 0, rr, c0, c0, 3 /* TLB Type Register */
#define CP15_MPIDR(rr) p15, 0, rr, c0, c0, 5 /* Multiprocessor Affinity Register */
#define CP15_REVIDR(rr) p15, 0, rr, c0, c0, 6 /* Revision ID Register */
#define CP15_ID_PFR0(rr) p15, 0, rr, c0, c1, 0 /* Processor Feature Register 0 */
#define CP15_ID_PFR1(rr) p15, 0, rr, c0, c1, 1 /* Processor Feature Register 1 */
#define CP15_ID_DFR0(rr) p15, 0, rr, c0, c1, 2 /* Debug Feature Register 0 */
#define CP15_ID_AFR0(rr) p15, 0, rr, c0, c1, 3 /* Auxiliary Feature Register 0 */
#define CP15_ID_MMFR0(rr) p15, 0, rr, c0, c1, 4 /* Memory Model Feature Register 0 */
#define CP15_ID_MMFR1(rr) p15, 0, rr, c0, c1, 5 /* Memory Model Feature Register 1 */
#define CP15_ID_MMFR2(rr) p15, 0, rr, c0, c1, 6 /* Memory Model Feature Register 2 */
#define CP15_ID_MMFR3(rr) p15, 0, rr, c0, c1, 7 /* Memory Model Feature Register 3 */
#define CP15_ID_ISAR0(rr) p15, 0, rr, c0, c2, 0 /* Instruction Set Attribute Register 0 */
#define CP15_ID_ISAR1(rr) p15, 0, rr, c0, c2, 1 /* Instruction Set Attribute Register 1 */
#define CP15_ID_ISAR2(rr) p15, 0, rr, c0, c2, 2 /* Instruction Set Attribute Register 2 */
#define CP15_ID_ISAR3(rr) p15, 0, rr, c0, c2, 3 /* Instruction Set Attribute Register 3 */
#define CP15_ID_ISAR4(rr) p15, 0, rr, c0, c2, 4 /* Instruction Set Attribute Register 4 */
#define CP15_ID_ISAR5(rr) p15, 0, rr, c0, c2, 5 /* Instruction Set Attribute Register 5 */
#define CP15_CCSIDR(rr) p15, 1, rr, c0, c0, 0 /* Cache Size ID Registers */
#define CP15_CLIDR(rr) p15, 1, rr, c0, c0, 1 /* Cache Level ID Register */
#define CP15_AIDR(rr) p15, 1, rr, c0, c0, 7 /* Auxiliary ID Register */
#define CP15_CSSELR(rr) p15, 2, rr, c0, c0, 0 /* Cache Size Selection Register */
/*
* CP15 C1 registers
*/
#define CP15_SCTLR(rr) p15, 0, rr, c1, c0, 0 /* System Control Register */
#define CP15_ACTLR(rr) p15, 0, rr, c1, c0, 1 /* IMPLEMENTATION DEFINED Auxiliary Control Register */
#define CP15_CPACR(rr) p15, 0, rr, c1, c0, 2 /* Coprocessor Access Control Register */
#define CP15_SCR(rr) p15, 0, rr, c1, c1, 0 /* Secure Configuration Register */
#define CP15_SDER(rr) p15, 0, rr, c1, c1, 1 /* Secure Debug Enable Register */
#define CP15_NSACR(rr) p15, 0, rr, c1, c1, 2 /* Non-Secure Access Control Register */
/*
* CP15 C2 registers
*/
#define CP15_TTBR0(rr) p15, 0, rr, c2, c0, 0 /* Translation Table Base Register 0 */
#define CP15_TTBR1(rr) p15, 0, rr, c2, c0, 1 /* Translation Table Base Register 1 */
#define CP15_TTBCR(rr) p15, 0, rr, c2, c0, 2 /* Translation Table Base Control Register */
/*
* CP15 C3 registers
*/
#define CP15_DACR(rr) p15, 0, rr, c3, c0, 0 /* Domain Access Control Register */
/*
* CP15 C5 registers
*/
#define CP15_DFSR(rr) p15, 0, rr, c5, c0, 0 /* Data Fault Status Register */
#if __ARM_ARCH >= 6
/* From ARMv6: */
#define CP15_IFSR(rr) p15, 0, rr, c5, c0, 1 /* Instruction Fault Status Register */
#endif
#if __ARM_ARCH >= 7
/* From ARMv7: */
#define CP15_ADFSR(rr) p15, 0, rr, c5, c1, 0 /* Auxiliary Data Fault Status Register */
#define CP15_AIFSR(rr) p15, 0, rr, c5, c1, 1 /* Auxiliary Instruction Fault Status Register */
#endif
/*
* CP15 C6 registers
*/
#define CP15_DFAR(rr) p15, 0, rr, c6, c0, 0 /* Data Fault Address Register */
#if __ARM_ARCH >= 6
/* From ARMv6k: */
#define CP15_IFAR(rr) p15, 0, rr, c6, c0, 2 /* Instruction Fault Address Register */
#endif
/*
* CP15 C7 registers
*/
#if __ARM_ARCH >= 7 && defined(SMP)
/* From ARMv7: */
#define CP15_ICIALLUIS p15, 0, r0, c7, c1, 0 /* Instruction cache invalidate all PoU, IS */
#define CP15_BPIALLIS p15, 0, r0, c7, c1, 6 /* Branch predictor invalidate all IS */
#endif
#define CP15_PAR(rr) p15, 0, rr, c7, c4, 0 /* Physical Address Register */
#define CP15_ICIALLU p15, 0, r0, c7, c5, 0 /* Instruction cache invalidate all PoU */
#define CP15_ICIMVAU(rr) p15, 0, rr, c7, c5, 1 /* Instruction cache invalidate */
#if __ARM_ARCH == 6
/* Deprecated in ARMv7 */
#define CP15_CP15ISB p15, 0, r0, c7, c5, 4 /* ISB */
#endif
#define CP15_BPIALL p15, 0, r0, c7, c5, 6 /* Branch predictor invalidate all */
#define CP15_BPIMVA p15, 0, rr, c7, c5, 7 /* Branch predictor invalidate by MVA */
#if __ARM_ARCH == 6
/* Only ARMv6: */
#define CP15_DCIALL p15, 0, r0, c7, c6, 0 /* Data cache invalidate all */
#endif
#define CP15_DCIMVAC(rr) p15, 0, rr, c7, c6, 1 /* Data cache invalidate by MVA PoC */
#define CP15_DCISW(rr) p15, 0, rr, c7, c6, 2 /* Data cache invalidate by set/way */
#define CP15_ATS1CPR(rr) p15, 0, rr, c7, c8, 0 /* Stage 1 Current state PL1 read */
#define CP15_ATS1CPW(rr) p15, 0, rr, c7, c8, 1 /* Stage 1 Current state PL1 write */
#define CP15_ATS1CUR(rr) p15, 0, rr, c7, c8, 2 /* Stage 1 Current state unprivileged read */
#define CP15_ATS1CUW(rr) p15, 0, rr, c7, c8, 3 /* Stage 1 Current state unprivileged write */
#if __ARM_ARCH >= 7
/* From ARMv7: */
#define CP15_ATS12NSOPR(rr) p15, 0, rr, c7, c8, 4 /* Stages 1 and 2 Non-secure only PL1 read */
#define CP15_ATS12NSOPW(rr) p15, 0, rr, c7, c8, 5 /* Stages 1 and 2 Non-secure only PL1 write */
#define CP15_ATS12NSOUR(rr) p15, 0, rr, c7, c8, 6 /* Stages 1 and 2 Non-secure only unprivileged read */
#define CP15_ATS12NSOUW(rr) p15, 0, rr, c7, c8, 7 /* Stages 1 and 2 Non-secure only unprivileged write */
#endif
#if __ARM_ARCH == 6
/* Only ARMv6: */
#define CP15_DCCALL p15, 0, r0, c7, c10, 0 /* Data cache clean all */
#endif
#define CP15_DCCMVAC(rr) p15, 0, rr, c7, c10, 1 /* Data cache clean by MVA PoC */
#define CP15_DCCSW(rr) p15, 0, rr, c7, c10, 2 /* Data cache clean by set/way */
#if __ARM_ARCH == 6
/* Only ARMv6: */
#define CP15_CP15DSB p15, 0, r0, c7, c10, 4 /* DSB */
#define CP15_CP15DMB p15, 0, r0, c7, c10, 5 /* DMB */
#define CP15_CP15WFI p15, 0, r0, c7, c0, 4 /* WFI */
#endif
#if __ARM_ARCH >= 7
/* From ARMv7: */
#define CP15_DCCMVAU(rr) p15, 0, rr, c7, c11, 1 /* Data cache clean by MVA PoU */
#endif
#if __ARM_ARCH == 6
/* Only ARMv6: */
#define CP15_DCCIALL p15, 0, r0, c7, c14, 0 /* Data cache clean and invalidate all */
#endif
#define CP15_DCCIMVAC(rr) p15, 0, rr, c7, c14, 1 /* Data cache clean and invalidate by MVA PoC */
#define CP15_DCCISW(rr) p15, 0, rr, c7, c14, 2 /* Data cache clean and invalidate by set/way */
/*
* CP15 C8 registers
*/
#if __ARM_ARCH >= 7 && defined(SMP)
/* From ARMv7: */
#define CP15_TLBIALLIS p15, 0, r0, c8, c3, 0 /* Invalidate entire unified TLB IS */
#define CP15_TLBIMVAIS(rr) p15, 0, rr, c8, c3, 1 /* Invalidate unified TLB by MVA IS */
#define CP15_TLBIASIDIS(rr) p15, 0, rr, c8, c3, 2 /* Invalidate unified TLB by ASID IS */
#define CP15_TLBIMVAAIS(rr) p15, 0, rr, c8, c3, 3 /* Invalidate unified TLB by MVA, all ASID IS */
#endif
#define CP15_TLBIALL p15, 0, r0, c8, c7, 0 /* Invalidate entire unified TLB */
#define CP15_TLBIMVA(rr) p15, 0, rr, c8, c7, 1 /* Invalidate unified TLB by MVA */
#define CP15_TLBIASID(rr) p15, 0, rr, c8, c7, 2 /* Invalidate unified TLB by ASID */
#if __ARM_ARCH >= 6
/* From ARMv6: */
#define CP15_TLBIMVAA(rr) p15, 0, rr, c8, c7, 3 /* Invalidate unified TLB by MVA, all ASID */
#endif
/*
* CP15 C9 registers
*/
#if __ARM_ARCH == 6 && defined(CPU_ARM1176)
#define CP15_PMUSERENR(rr) p15, 0, rr, c15, c9, 0 /* Access Validation Control Register */
#define CP15_PMCR(rr) p15, 0, rr, c15, c12, 0 /* Performance Monitor Control Register */
#define CP15_PMCCNTR(rr) p15, 0, rr, c15, c12, 1 /* PM Cycle Count Register */
#elif __ARM_ARCH > 6
#define CP15_L2CTLR(rr) p15, 1, rr, c9, c0, 2 /* L2 Control Register */
#define CP15_PMCR(rr) p15, 0, rr, c9, c12, 0 /* Performance Monitor Control Register */
#define CP15_PMCNTENSET(rr) p15, 0, rr, c9, c12, 1 /* PM Count Enable Set Register */
#define CP15_PMCNTENCLR(rr) p15, 0, rr, c9, c12, 2 /* PM Count Enable Clear Register */
#define CP15_PMOVSR(rr) p15, 0, rr, c9, c12, 3 /* PM Overflow Flag Status Register */
#define CP15_PMSWINC(rr) p15, 0, rr, c9, c12, 4 /* PM Software Increment Register */
#define CP15_PMSELR(rr) p15, 0, rr, c9, c12, 5 /* PM Event Counter Selection Register */
#define CP15_PMCCNTR(rr) p15, 0, rr, c9, c13, 0 /* PM Cycle Count Register */
#define CP15_PMXEVTYPER(rr) p15, 0, rr, c9, c13, 1 /* PM Event Type Select Register */
#define CP15_PMXEVCNTRR(rr) p15, 0, rr, c9, c13, 2 /* PM Event Count Register */
#define CP15_PMUSERENR(rr) p15, 0, rr, c9, c14, 0 /* PM User Enable Register */
#define CP15_PMINTENSET(rr) p15, 0, rr, c9, c14, 1 /* PM Interrupt Enable Set Register */
#define CP15_PMINTENCLR(rr) p15, 0, rr, c9, c14, 2 /* PM Interrupt Enable Clear Register */
#endif
/*
* CP15 C10 registers
*/
/* Without LPAE this is PRRR, with LPAE it's MAIR0 */
#define CP15_PRRR(rr) p15, 0, rr, c10, c2, 0 /* Primary Region Remap Register */
#define CP15_MAIR0(rr) p15, 0, rr, c10, c2, 0 /* Memory Attribute Indirection Register 0 */
/* Without LPAE this is NMRR, with LPAE it's MAIR1 */
#define CP15_NMRR(rr) p15, 0, rr, c10, c2, 1 /* Normal Memory Remap Register */
#define CP15_MAIR1(rr) p15, 0, rr, c10, c2, 1 /* Memory Attribute Indirection Register 1 */
#define CP15_AMAIR0(rr) p15, 0, rr, c10, c3, 0 /* Auxiliary Memory Attribute Indirection Register 0 */
#define CP15_AMAIR1(rr) p15, 0, rr, c10, c3, 1 /* Auxiliary Memory Attribute Indirection Register 1 */
/*
* CP15 C12 registers
*/
#define CP15_VBAR(rr) p15, 0, rr, c12, c0, 0 /* Vector Base Address Register */
#define CP15_MVBAR(rr) p15, 0, rr, c12, c0, 1 /* Monitor Vector Base Address Register */
#define CP15_ISR(rr) p15, 0, rr, c12, c1, 0 /* Interrupt Status Register */
/*
* CP15 C13 registers
*/
#define CP15_FCSEIDR(rr) p15, 0, rr, c13, c0, 0 /* FCSE Process ID Register */
#define CP15_CONTEXTIDR(rr) p15, 0, rr, c13, c0, 1 /* Context ID Register */
#define CP15_TPIDRURW(rr) p15, 0, rr, c13, c0, 2 /* User Read/Write Thread ID Register */
#define CP15_TPIDRURO(rr) p15, 0, rr, c13, c0, 3 /* User Read-Only Thread ID Register */
#define CP15_TPIDRPRW(rr) p15, 0, rr, c13, c0, 4 /* PL1 only Thread ID Register */
/*
* CP15 C14 registers
* These are the Generic Timer registers and may be unallocated on some SoCs.
* Only use these when you know the Generic Timer is available.
*/
#define CP15_CNTFRQ(rr) p15, 0, rr, c14, c0, 0 /* Counter Frequency Register */
#define CP15_CNTKCTL(rr) p15, 0, rr, c14, c1, 0 /* Timer PL1 Control Register */
#define CP15_CNTP_TVAL(rr) p15, 0, rr, c14, c2, 0 /* PL1 Physical Timer Value Register */
#define CP15_CNTP_CTL(rr) p15, 0, rr, c14, c2, 1 /* PL1 Physical Timer Control Register */
#define CP15_CNTV_TVAL(rr) p15, 0, rr, c14, c3, 0 /* Virtual Timer Value Register */
#define CP15_CNTV_CTL(rr) p15, 0, rr, c14, c3, 1 /* Virtual Timer Control Register */
#define CP15_CNTHCTL(rr) p15, 4, rr, c14, c1, 0 /* Timer PL2 Control Register */
#define CP15_CNTHP_TVAL(rr) p15, 4, rr, c14, c2, 0 /* PL2 Physical Timer Value Register */
#define CP15_CNTHP_CTL(rr) p15, 4, rr, c14, c2, 1 /* PL2 Physical Timer Control Register */
/* 64-bit registers for use with mcrr/mrrc */
#define CP15_CNTPCT(rq, rr) p15, 0, rq, rr, c14 /* Physical Count Register */
#define CP15_CNTVCT(rq, rr) p15, 1, rq, rr, c14 /* Virtual Count Register */
#define CP15_CNTP_CVAL(rq, rr) p15, 2, rq, rr, c14 /* PL1 Physical Timer Compare Value Register */
#define CP15_CNTV_CVAL(rq, rr) p15, 3, rq, rr, c14 /* Virtual Timer Compare Value Register */
#define CP15_CNTVOFF(rq, rr) p15, 4, rq, rr, c14 /* Virtual Offset Register */
#define CP15_CNTHP_CVAL(rq, rr) p15, 6, rq, rr, c14 /* PL2 Physical Timer Compare Value Register */
/*
* CP15 C15 registers
*/
#define CP15_CBAR(rr) p15, 4, rr, c15, c0, 0 /* Configuration Base Address Register */
#endif /* !MACHINE_SYSREG_H */
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