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Diffstat (limited to 'src/target/esirisc_jtag.h')
| -rw-r--r-- | src/target/esirisc_jtag.h | 104 |
1 files changed, 104 insertions, 0 deletions
diff --git a/src/target/esirisc_jtag.h b/src/target/esirisc_jtag.h new file mode 100644 index 00000000..8189ddc6 --- /dev/null +++ b/src/target/esirisc_jtag.h @@ -0,0 +1,104 @@ +/*************************************************************************** + * Copyright (C) 2018 by Square, Inc. * + * Steven Stallion <stallion@squareup.com> * + * James Zhao <hjz@squareup.com> * + * * + * This program is free software; you can redistribute it and/or modify * + * it under the terms of the GNU General Public License as published by * + * the Free Software Foundation; either version 2 of the License, or * + * (at your option) any later version. * + * * + * This program 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 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 OPENOCD_TARGET_ESIRISC_JTAG_H +#define OPENOCD_TARGET_ESIRISC_JTAG_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 */ |