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/* SPDX-License-Identifier: GPL-2.0-or-later */
/***************************************************************************
* Copyright (C) 2018 by Square, Inc. *
* Steven Stallion <stallion@squareup.com> *
* James Zhao <hjz@squareup.com> *
***************************************************************************/
#ifndef OPENOCD_TARGET_ESIRISC_JTAG_H
#define OPENOCD_TARGET_ESIRISC_JTAG_H
#include <helper/types.h>
#include <jtag/jtag.h>
/* TAP Instructions */
#define INSTR_IDCODE 0x8
#define INSTR_DEBUG 0x9
#define INSTR_BYPASS 0xf
#define INSTR_LENGTH 4
/* eSi-Debug Commands */
#define DEBUG_NOP 0x00
#define DEBUG_READ_BYTE 0x10
#define DEBUG_READ_HWORD 0x20
#define DEBUG_READ_WORD 0x30
#define DEBUG_WRITE_BYTE 0x60
#define DEBUG_WRITE_HWORD 0x70
#define DEBUG_WRITE_WORD 0x80
#define DEBUG_READ_REG 0xb0
#define DEBUG_WRITE_REG 0xc0
#define DEBUG_READ_CSR 0xd0
#define DEBUG_WRITE_CSR 0xe0
#define DEBUG_ENABLE_DEBUG 0xf0
#define DEBUG_DISABLE_DEBUG 0xf2
#define DEBUG_ASSERT_RESET 0xf4
#define DEBUG_DEASSERT_RESET 0xf6
#define DEBUG_BREAK 0xf8
#define DEBUG_CONTINUE 0xfa
#define DEBUG_FLUSH_CACHES 0xfc
/* Exception IDs */
#define EID_OVERFLOW 0x3d
#define EID_CANT_DEBUG 0x3e
#define EID_NONE 0x3f
/* Byte Stuffing */
#define STUFF_MARKER 0x55
#define PAD_BYTE 0xaa
struct esirisc_jtag {
struct jtag_tap *tap;
uint8_t status;
};
bool esirisc_jtag_is_debug_active(struct esirisc_jtag *jtag_info);
bool esirisc_jtag_is_stopped(struct esirisc_jtag *jtag_info);
uint8_t esirisc_jtag_get_eid(struct esirisc_jtag *jtag_info);
int esirisc_jtag_read_byte(struct esirisc_jtag *jtag_info,
uint32_t address, uint8_t *data);
int esirisc_jtag_read_hword(struct esirisc_jtag *jtag_info,
uint32_t address, uint16_t *data);
int esirisc_jtag_read_word(struct esirisc_jtag *jtag_info,
uint32_t address, uint32_t *data);
int esirisc_jtag_write_byte(struct esirisc_jtag *jtag_info,
uint32_t address, uint8_t data);
int esirisc_jtag_write_hword(struct esirisc_jtag *jtag_info,
uint32_t address, uint16_t data);
int esirisc_jtag_write_word(struct esirisc_jtag *jtag_info,
uint32_t address, uint32_t data);
int esirisc_jtag_read_reg(struct esirisc_jtag *jtag_info,
uint8_t reg, uint32_t *data);
int esirisc_jtag_write_reg(struct esirisc_jtag *jtag_info,
uint8_t reg, uint32_t data);
int esirisc_jtag_read_csr(struct esirisc_jtag *jtag_info,
uint8_t bank, uint8_t csr, uint32_t *data);
int esirisc_jtag_write_csr(struct esirisc_jtag *jtag_info,
uint8_t bank, uint8_t csr, uint32_t data);
int esirisc_jtag_enable_debug(struct esirisc_jtag *jtag_info);
int esirisc_jtag_disable_debug(struct esirisc_jtag *jtag_info);
int esirisc_jtag_assert_reset(struct esirisc_jtag *jtag_info);
int esirisc_jtag_deassert_reset(struct esirisc_jtag *jtag_info);
int esirisc_jtag_break(struct esirisc_jtag *jtag_info);
int esirisc_jtag_continue(struct esirisc_jtag *jtag_info);
int esirisc_jtag_flush_caches(struct esirisc_jtag *jtag_info);
#endif /* OPENOCD_TARGET_ESIRISC_JTAG_H */
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