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/*
* QEMU RISC-V Native Debug Support
*
* Copyright (c) 2022 Wind River Systems, Inc.
*
* Author:
* Bin Meng <bin.meng@windriver.com>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2 or later, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef RISCV_DEBUG_H
#define RISCV_DEBUG_H
#define RV_MAX_TRIGGERS 2
/* register index of tdata CSRs */
enum {
TDATA1 = 0,
TDATA2,
TDATA3,
TDATA_NUM
};
typedef enum {
TRIGGER_TYPE_NO_EXIST = 0, /* trigger does not exist */
TRIGGER_TYPE_AD_MATCH = 2, /* address/data match trigger */
TRIGGER_TYPE_INST_CNT = 3, /* instruction count trigger */
TRIGGER_TYPE_INT = 4, /* interrupt trigger */
TRIGGER_TYPE_EXCP = 5, /* exception trigger */
TRIGGER_TYPE_AD_MATCH6 = 6, /* new address/data match trigger */
TRIGGER_TYPE_EXT_SRC = 7, /* external source trigger */
TRIGGER_TYPE_UNAVAIL = 15, /* trigger exists, but unavailable */
TRIGGER_TYPE_NUM
} trigger_type_t;
typedef struct {
target_ulong mcontrol;
target_ulong maddress;
struct CPUBreakpoint *bp;
struct CPUWatchpoint *wp;
} type2_trigger_t;
/* tdata1 field masks */
#define RV32_TYPE(t) ((uint32_t)(t) << 28)
#define RV32_TYPE_MASK (0xf << 28)
#define RV32_DMODE BIT(27)
#define RV64_TYPE(t) ((uint64_t)(t) << 60)
#define RV64_TYPE_MASK (0xfULL << 60)
#define RV64_DMODE BIT_ULL(59)
/* mcontrol field masks */
#define TYPE2_LOAD BIT(0)
#define TYPE2_STORE BIT(1)
#define TYPE2_EXEC BIT(2)
#define TYPE2_U BIT(3)
#define TYPE2_S BIT(4)
#define TYPE2_M BIT(6)
#define TYPE2_MATCH (0xf << 7)
#define TYPE2_CHAIN BIT(11)
#define TYPE2_ACTION (0xf << 12)
#define TYPE2_SIZELO (0x3 << 16)
#define TYPE2_TIMING BIT(18)
#define TYPE2_SELECT BIT(19)
#define TYPE2_HIT BIT(20)
#define TYPE2_SIZEHI (0x3 << 21) /* RV64 only */
/* access size */
enum {
SIZE_ANY = 0,
SIZE_1B,
SIZE_2B,
SIZE_4B,
SIZE_6B,
SIZE_8B,
SIZE_10B,
SIZE_12B,
SIZE_14B,
SIZE_16B,
SIZE_NUM = 16
};
bool tdata_available(CPURISCVState *env, int tdata_index);
target_ulong tselect_csr_read(CPURISCVState *env);
void tselect_csr_write(CPURISCVState *env, target_ulong val);
target_ulong tdata_csr_read(CPURISCVState *env, int tdata_index);
void tdata_csr_write(CPURISCVState *env, int tdata_index, target_ulong val);
void riscv_cpu_debug_excp_handler(CPUState *cs);
bool riscv_cpu_debug_check_breakpoint(CPUState *cs);
bool riscv_cpu_debug_check_watchpoint(CPUState *cs, CPUWatchpoint *wp);
void riscv_trigger_init(CPURISCVState *env);
#endif /* RISCV_DEBUG_H */
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