-------------
ARM11, ARM7, ARM9, AVR32, Cortex-A, Cortex-R, Cortex-M, LS102x-SAP,
-Feroceon/Dragonite, DSP563xx, DSP5680xx, FA526, MIPS EJTAG, NDS32,
-XScale, Intel Quark.
+Feroceon/Dragonite, DSP563xx, DSP5680xx, EnSilica eSi-RISC, FA526, MIPS
+EJTAG, NDS32, XScale, Intel Quark.
Flash drivers
-------------
-ADUC702x, AT91SAM, ATH79, AVR, CFI, DSP5680xx, EFM32, EM357, FM3, FM4, Kinetis,
-LPC8xx/LPC1xxx/LPC2xxx/LPC541xx, LPC2900, LPCSPIFI, Marvell QSPI,
-Milandr, NIIET, NuMicro, PIC32mx, PSoC4, PSoC5LP, SiM3x, Stellaris, STM32,
-STMSMI, STR7x, STR9x, nRF51; NAND controllers of AT91SAM9, LPC3180, LPC32xx,
-i.MX31, MXC, NUC910, Orion/Kirkwood, S3C24xx, S3C6400, XMC1xxx, XMC4xxx.
+ADUC702x, AT91SAM, ATH79, AVR, CFI, DSP5680xx, EFM32, EM357, eSi-TSMC,
+FM3, FM4, Kinetis, LPC8xx/LPC1xxx/LPC2xxx/LPC541xx, LPC2900, LPCSPIFI,
+Marvell QSPI, Milandr, NIIET, NuMicro, PIC32mx, PSoC4, PSoC5LP, SiM3x,
+Stellaris, STM32, STMSMI, STR7x, STR9x, nRF51; NAND controllers of
+AT91SAM9, LPC3180, LPC32xx, i.MX31, MXC, NUC910, Orion/Kirkwood,
+S3C24xx, S3C6400, XMC1xxx, XMC4xxx.
==================
@item @code{dragonite} -- resembles arm966e
@item @code{dsp563xx} -- implements Freescale's 24-bit DSP.
(Support for this is still incomplete.)
+@item @code{esirisc} -- this is an EnSilica eSi-RISC core.
+The current implementation supports eSi-32xx cores.
@item @code{fa526} -- resembles arm920 (w/o Thumb)
@item @code{feroceon} -- resembles arm926
@item @code{mips_m4k} -- a MIPS core
supported.}
@end deffn
+@deffn {Flash Driver} esirisc
+Members of the eSi-RISC family may optionally include internal flash programmed
+via the eSi-TSMC Flash interface. Additional parameters are required to
+configure the driver: @option{cfg_address} is the base address of the
+configuration register interface, @option{clock_hz} is the expected clock
+frequency, and @option{wait_states} is the number of configured read wait states.
+
+@example
+flash bank $_FLASHNAME esirisc base_address size_bytes 0 0 $_TARGETNAME cfg_address clock_hz wait_states
+@end example
+
+@deffn Command {esirisc_flash mass_erase} (bank_id)
+Erases all pages in data memory for the bank identified by @option{bank_id}.
+@end deffn
+
+@deffn Command {esirisc_flash ref_erase} (bank_id)
+Erases the reference cell for the bank identified by @option{bank_id}. This is
+an uncommon operation.
+@end deffn
+@end deffn
+
@deffn {Flash Driver} fm3
All members of the FM3 microcontroller family from Fujitsu
include internal flash and use ARM Cortex-M3 cores.
@option{on}.
@end deffn
+@section EnSilica eSi-RISC Architecture
+
+eSi-RISC is a highly configurable microprocessor architecture for embedded systems
+provided by EnSilica. (See: @url{http://www.ensilica.com/risc-ip/}.)
+
+@subsection esirisc specific commands
+@deffn Command {esirisc cache_arch} (@option{harvard}|@option{von_neumann})
+Configure the caching architecture. Targets with the @code{UNIFIED_ADDRESS_SPACE}
+option disabled employ a Harvard architecture. By default, @option{von_neumann} is assumed.
+@end deffn
+
+@deffn Command {esirisc flush_caches}
+Flush instruction and data caches. This command requires that the target is halted
+when the command is issued and configured with an instruction or data cache.
+@end deffn
+
+@deffn Command {esirisc hwdc} (@option{all}|@option{none}|mask ...)
+Configure hardware debug control. The HWDC register controls which exceptions return
+control back to the debugger. Possible masks are @option{all}, @option{none},
+@option{reset}, @option{interrupt}, @option{syscall}, @option{error}, and @option{debug}.
+By default, @option{reset}, @option{error}, and @option{debug} are enabled.
+@end deffn
+
@section Intel Architecture
Intel Quark X10xx is the first product in the Quark family of SoCs. It is an IA-32
%D%/dsp5680xx_flash.c \
%D%/efm32.c \
%D%/em357.c \
+ %D%/esirisc_flash.c \
%D%/faux.c \
%D%/fm3.c \
%D%/fm4.c \
extern struct flash_driver dsp5680xx_flash;
extern struct flash_driver efm32_flash;
extern struct flash_driver em357_flash;
+extern struct flash_driver esirisc_flash;
extern struct flash_driver faux_flash;
extern struct flash_driver fm3_flash;
extern struct flash_driver fm4_flash;
&dsp5680xx_flash,
&efm32_flash,
&em357_flash,
+ &esirisc_flash,
&faux_flash,
&fm3_flash,
&fm4_flash,
--- /dev/null
+/***************************************************************************
+ * 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/>. *
+ ***************************************************************************/
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <flash/common.h>
+#include <flash/nor/imp.h>
+#include <helper/command.h>
+#include <helper/log.h>
+#include <helper/time_support.h>
+#include <helper/types.h>
+#include <target/esirisc.h>
+#include <target/target.h>
+
+/* eSi-TSMC Flash Registers */
+#define CONTROL 0x00 /* Control Register */
+#define TIMING0 0x04 /* Timing Register 0 */
+#define TIMING1 0x08 /* Timing Register 1 */
+#define TIMING2 0x0c /* Timing Register 2 */
+#define UNLOCK1 0x18 /* Unlock 1 */
+#define UNLOCK2 0x1c /* Unlock 2 */
+#define ADDRESS 0x20 /* Erase/Program Address */
+#define PB_DATA 0x24 /* Program Buffer Data */
+#define PB_INDEX 0x28 /* Program Buffer Index */
+#define STATUS 0x2c /* Status Register */
+#define REDUN_0 0x30 /* Redundant Address 0 */
+#define REDUN_1 0x34 /* Redundant Address 1 */
+
+/* Control Fields */
+#define CONTROL_SLM (1<<0) /* Sleep Mode */
+#define CONTROL_WP (1<<1) /* Register Write Protect */
+#define CONTROL_E (1<<3) /* Erase */
+#define CONTROL_EP (1<<4) /* Erase Page */
+#define CONTROL_P (1<<5) /* Program Flash */
+#define CONTROL_ERC (1<<6) /* Erase Reference Cell */
+#define CONTROL_R (1<<7) /* Recall Trim Code */
+#define CONTROL_AP (1<<8) /* Auto-Program */
+
+/* Timing Fields */
+#define TIMING0_R(x) (((x) << 0) & 0x3f) /* Read Wait States */
+#define TIMING0_F(x) (((x) << 16) & 0xffff0000) /* Tnvh Clock Cycles */
+#define TIMING1_E(x) (((x) << 0) & 0xffffff) /* Tme/Terase/Tre Clock Cycles */
+#define TIMING2_P(x) (((x) << 0) & 0xffff) /* Tprog Clock Cycles */
+#define TIMING2_H(x) (((x) << 16) & 0xff0000) /* Clock Cycles in 100ns */
+#define TIMING2_T(x) (((x) << 24) & 0xf000000) /* Clock Cycles in 10ns */
+
+/* Status Fields */
+#define STATUS_BUSY (1<<0) /* Busy (Erase/Program) */
+#define STATUS_WER (1<<1) /* Write Protect Error */
+#define STATUS_DR (1<<2) /* Disable Redundancy */
+#define STATUS_DIS (1<<3) /* Discharged */
+#define STATUS_BO (1<<4) /* Brown Out */
+
+/* Redundant Address Fields */
+#define REDUN_R (1<<0) /* Used */
+#define REDUN_P(x) (((x) << 12) & 0x7f000) /* Redundant Page Address */
+
+/*
+ * The eSi-TSMC Flash manual provides two sets of timings based on the
+ * underlying flash process. By default, 90nm is assumed.
+ */
+#if 0 /* 55nm */
+#define TNVH 5000 /* 5us */
+#define TME 80000000 /* 80ms */
+#define TERASE 160000000 /* 160ms */
+#define TRE 100000000 /* 100ms */
+#define TPROG 8000 /* 8us */
+#else /* 90nm */
+#define TNVH 5000 /* 5us */
+#define TME 20000000 /* 20ms */
+#define TERASE 40000000 /* 40ms */
+#define TRE 40000000 /* 40ms */
+#define TPROG 40000 /* 40us */
+#endif
+
+#define CONTROL_TIMEOUT 5000 /* 5s */
+#define PAGE_SIZE 4096
+#define PB_MAX 32
+
+#define NUM_NS_PER_S 1000000000ULL
+
+struct esirisc_flash_bank {
+ bool probed;
+ uint32_t cfg;
+ uint32_t clock;
+ uint32_t wait_states;
+};
+
+FLASH_BANK_COMMAND_HANDLER(esirisc_flash_bank_command)
+{
+ struct esirisc_flash_bank *esirisc_info;
+
+ if (CMD_ARGC < 9)
+ return ERROR_COMMAND_SYNTAX_ERROR;
+
+ esirisc_info = calloc(1, sizeof(struct esirisc_flash_bank));
+
+ COMMAND_PARSE_NUMBER(u32, CMD_ARGV[6], esirisc_info->cfg);
+ COMMAND_PARSE_NUMBER(u32, CMD_ARGV[7], esirisc_info->clock);
+ COMMAND_PARSE_NUMBER(u32, CMD_ARGV[8], esirisc_info->wait_states);
+
+ bank->driver_priv = esirisc_info;
+
+ return ERROR_OK;
+}
+
+/*
+ * Register writes are ignored if the control.WP flag is set; the
+ * following sequence is required to modify this flag even when
+ * protection is disabled.
+ */
+static int esirisc_flash_unlock(struct flash_bank *bank)
+{
+ struct esirisc_flash_bank *esirisc_info = bank->driver_priv;
+ struct target *target = bank->target;
+
+ target_write_u32(target, esirisc_info->cfg + UNLOCK1, 0x7123);
+ target_write_u32(target, esirisc_info->cfg + UNLOCK2, 0x812a);
+ target_write_u32(target, esirisc_info->cfg + UNLOCK1, 0xbee1);
+
+ return ERROR_OK;
+}
+
+static int esirisc_flash_disable_protect(struct flash_bank *bank)
+{
+ struct esirisc_flash_bank *esirisc_info = bank->driver_priv;
+ struct target *target = bank->target;
+ uint32_t control;
+
+ target_read_u32(target, esirisc_info->cfg + CONTROL, &control);
+ if (!(control & CONTROL_WP))
+ return ERROR_OK;
+
+ esirisc_flash_unlock(bank);
+
+ control &= ~CONTROL_WP;
+
+ target_write_u32(target, esirisc_info->cfg + CONTROL, control);
+
+ return ERROR_OK;
+}
+
+static int esirisc_flash_enable_protect(struct flash_bank *bank)
+{
+ struct esirisc_flash_bank *esirisc_info = bank->driver_priv;
+ struct target *target = bank->target;
+ uint32_t control;
+
+ target_read_u32(target, esirisc_info->cfg + CONTROL, &control);
+ if (control & CONTROL_WP)
+ return ERROR_OK;
+
+ esirisc_flash_unlock(bank);
+
+ control |= CONTROL_WP;
+
+ target_write_u32(target, esirisc_info->cfg + CONTROL, control);
+
+ return ERROR_OK;
+}
+
+static int esirisc_flash_check_status(struct flash_bank *bank)
+{
+ struct esirisc_flash_bank *esirisc_info = bank->driver_priv;
+ struct target *target = bank->target;
+ uint32_t status;
+
+ target_read_u32(target, esirisc_info->cfg + STATUS, &status);
+ if (status & STATUS_WER) {
+ LOG_ERROR("%s: bad status: 0x%" PRIx32, bank->name, status);
+ return ERROR_FLASH_OPERATION_FAILED;
+ }
+
+ return ERROR_OK;
+}
+
+static int esirisc_flash_clear_status(struct flash_bank *bank)
+{
+ struct esirisc_flash_bank *esirisc_info = bank->driver_priv;
+ struct target *target = bank->target;
+
+ target_write_u32(target, esirisc_info->cfg + STATUS, STATUS_WER);
+
+ return ERROR_OK;
+}
+
+static int esirisc_flash_wait(struct flash_bank *bank, int ms)
+{
+ struct esirisc_flash_bank *esirisc_info = bank->driver_priv;
+ struct target *target = bank->target;
+ uint32_t status;
+ int64_t t;
+
+ t = timeval_ms();
+ for (;;) {
+ target_read_u32(target, esirisc_info->cfg + STATUS, &status);
+ if (!(status & STATUS_BUSY))
+ return ERROR_OK;
+
+ if ((timeval_ms() - t) > ms)
+ return ERROR_TARGET_TIMEOUT;
+
+ keep_alive();
+ }
+}
+
+static int esirisc_flash_control(struct flash_bank *bank, uint32_t control)
+{
+ struct esirisc_flash_bank *esirisc_info = bank->driver_priv;
+ struct target *target = bank->target;
+
+ esirisc_flash_clear_status(bank);
+
+ target_write_u32(target, esirisc_info->cfg + CONTROL, control);
+
+ int retval = esirisc_flash_wait(bank, CONTROL_TIMEOUT);
+ if (retval != ERROR_OK) {
+ LOG_ERROR("%s: control timed out: 0x%" PRIx32, bank->name, control);
+ return retval;
+ }
+
+ return esirisc_flash_check_status(bank);
+}
+
+static int esirisc_flash_recall(struct flash_bank *bank)
+{
+ return esirisc_flash_control(bank, CONTROL_R);
+}
+
+static int esirisc_flash_erase(struct flash_bank *bank, int first, int last)
+{
+ struct esirisc_flash_bank *esirisc_info = bank->driver_priv;
+ struct target *target = bank->target;
+ int retval = ERROR_OK;
+
+ if (target->state != TARGET_HALTED)
+ return ERROR_TARGET_NOT_HALTED;
+
+ esirisc_flash_disable_protect(bank);
+
+ for (int page = first; page < last; ++page) {
+ uint32_t address = page * PAGE_SIZE;
+
+ target_write_u32(target, esirisc_info->cfg + ADDRESS, address);
+
+ retval = esirisc_flash_control(bank, CONTROL_EP);
+ if (retval != ERROR_OK) {
+ LOG_ERROR("%s: failed to erase address: 0x%" PRIx32, bank->name, address);
+ break;
+ }
+ }
+
+ esirisc_flash_enable_protect(bank);
+
+ return retval;
+}
+
+static int esirisc_flash_mass_erase(struct flash_bank *bank)
+{
+ struct esirisc_flash_bank *esirisc_info = bank->driver_priv;
+ struct target *target = bank->target;
+ int retval;
+
+ if (target->state != TARGET_HALTED)
+ return ERROR_TARGET_NOT_HALTED;
+
+ esirisc_flash_disable_protect(bank);
+
+ target_write_u32(target, esirisc_info->cfg + ADDRESS, 0);
+
+ retval = esirisc_flash_control(bank, CONTROL_E);
+ if (retval != ERROR_OK)
+ LOG_ERROR("%s: failed to mass erase", bank->name);
+
+ esirisc_flash_enable_protect(bank);
+
+ return retval;
+}
+
+/*
+ * Per TSMC, the reference cell should be erased once per sample. This
+ * is typically done during wafer sort, however we include support for
+ * those that may need to calibrate flash at a later time.
+ */
+static int esirisc_flash_ref_erase(struct flash_bank *bank)
+{
+ struct target *target = bank->target;
+ int retval;
+
+ if (target->state != TARGET_HALTED)
+ return ERROR_TARGET_NOT_HALTED;
+
+ esirisc_flash_disable_protect(bank);
+
+ retval = esirisc_flash_control(bank, CONTROL_ERC);
+ if (retval != ERROR_OK)
+ LOG_ERROR("%s: failed to erase reference cell", bank->name);
+
+ esirisc_flash_enable_protect(bank);
+
+ return retval;
+}
+
+static int esirisc_flash_protect(struct flash_bank *bank, int set, int first, int last)
+{
+ struct target *target = bank->target;
+
+ if (target->state != TARGET_HALTED)
+ return ERROR_TARGET_NOT_HALTED;
+
+ if (set)
+ esirisc_flash_enable_protect(bank);
+ else
+ esirisc_flash_disable_protect(bank);
+
+ return ERROR_OK;
+}
+
+static int esirisc_flash_fill_pb(struct flash_bank *bank,
+ const uint8_t *buffer, uint32_t count)
+{
+ struct esirisc_flash_bank *esirisc_info = bank->driver_priv;
+ struct target *target = bank->target;
+ struct esirisc_common *esirisc = target_to_esirisc(target);
+
+ /*
+ * The pb_index register is auto-incremented when pb_data is written
+ * and should be cleared before each operation.
+ */
+ target_write_u32(target, esirisc_info->cfg + PB_INDEX, 0);
+
+ /*
+ * The width of the pb_data register depends on the underlying
+ * target; writing one byte at a time incurs a significant
+ * performance penalty and should be avoided.
+ */
+ while (count > 0) {
+ uint32_t max_bytes = DIV_ROUND_UP(esirisc->num_bits, 8);
+ uint32_t num_bytes = MIN(count, max_bytes);
+
+ target_write_buffer(target, esirisc_info->cfg + PB_DATA, num_bytes, buffer);
+
+ buffer += num_bytes;
+ count -= num_bytes;
+ }
+
+ return ERROR_OK;
+}
+
+static int esirisc_flash_write(struct flash_bank *bank,
+ const uint8_t *buffer, uint32_t offset, uint32_t count)
+{
+ struct esirisc_flash_bank *esirisc_info = bank->driver_priv;
+ struct target *target = bank->target;
+ int retval = ERROR_OK;
+
+ if (target->state != TARGET_HALTED)
+ return ERROR_TARGET_NOT_HALTED;
+
+ esirisc_flash_disable_protect(bank);
+
+ /*
+ * The address register is auto-incremented based on the contents of
+ * the pb_index register after each operation completes. It can be
+ * set once provided pb_index is cleared before each operation.
+ */
+ target_write_u32(target, esirisc_info->cfg + ADDRESS, offset);
+
+ /*
+ * Care must be taken when filling the program buffer; a maximum of
+ * 32 bytes may be written at a time and may not cross a 32-byte
+ * boundary based on the current offset.
+ */
+ while (count > 0) {
+ uint32_t max_bytes = PB_MAX - (offset & 0x1f);
+ uint32_t num_bytes = MIN(count, max_bytes);
+
+ esirisc_flash_fill_pb(bank, buffer, num_bytes);
+
+ retval = esirisc_flash_control(bank, CONTROL_P);
+ if (retval != ERROR_OK) {
+ LOG_ERROR("%s: failed to program address: 0x%" PRIx32, bank->name, offset);
+ break;
+ }
+
+ buffer += num_bytes;
+ offset += num_bytes;
+ count -= num_bytes;
+ }
+
+ esirisc_flash_enable_protect(bank);
+
+ return retval;
+}
+
+static uint32_t esirisc_flash_num_cycles(struct flash_bank *bank, uint64_t ns)
+{
+ struct esirisc_flash_bank *esirisc_info = bank->driver_priv;
+
+ /* apply scaling factor to avoid truncation */
+ uint64_t hz = (uint64_t)esirisc_info->clock * 1000;
+ uint64_t num_cycles = ((hz / NUM_NS_PER_S) * ns) / 1000;
+
+ if (hz % NUM_NS_PER_S > 0)
+ num_cycles++;
+
+ return num_cycles;
+}
+
+static int esirisc_flash_init(struct flash_bank *bank)
+{
+ struct esirisc_flash_bank *esirisc_info = bank->driver_priv;
+ struct target *target = bank->target;
+ uint32_t value;
+ int retval;
+
+ esirisc_flash_disable_protect(bank);
+
+ /* initialize timing registers */
+ value = TIMING0_F(esirisc_flash_num_cycles(bank, TNVH)) |
+ TIMING0_R(esirisc_info->wait_states);
+
+ LOG_DEBUG("TIMING0: 0x%" PRIx32, value);
+ target_write_u32(target, esirisc_info->cfg + TIMING0, value);
+
+ value = TIMING1_E(esirisc_flash_num_cycles(bank, TERASE));
+
+ LOG_DEBUG("TIMING1: 0x%" PRIx32, value);
+ target_write_u32(target, esirisc_info->cfg + TIMING1, value);
+
+ value = TIMING2_T(esirisc_flash_num_cycles(bank, 10)) |
+ TIMING2_H(esirisc_flash_num_cycles(bank, 100)) |
+ TIMING2_P(esirisc_flash_num_cycles(bank, TPROG));
+
+ LOG_DEBUG("TIMING2: 0x%" PRIx32, value);
+ target_write_u32(target, esirisc_info->cfg + TIMING2, value);
+
+ /* recall trim code */
+ retval = esirisc_flash_recall(bank);
+ if (retval != ERROR_OK)
+ LOG_ERROR("%s: failed to recall trim code", bank->name);
+
+ esirisc_flash_enable_protect(bank);
+
+ return retval;
+}
+
+static int esirisc_flash_probe(struct flash_bank *bank)
+{
+ struct esirisc_flash_bank *esirisc_info = bank->driver_priv;
+ struct target *target = bank->target;
+ int retval;
+
+ if (target->state != TARGET_HALTED)
+ return ERROR_TARGET_NOT_HALTED;
+
+ bank->num_sectors = bank->size / PAGE_SIZE;
+ bank->sectors = alloc_block_array(0, PAGE_SIZE, bank->num_sectors);
+
+ /*
+ * Register write protection is enforced using a single protection
+ * block for the entire bank. This is as good as it gets.
+ */
+ bank->num_prot_blocks = 1;
+ bank->prot_blocks = alloc_block_array(0, bank->size, bank->num_prot_blocks);
+
+ retval = esirisc_flash_init(bank);
+ if (retval != ERROR_OK) {
+ LOG_ERROR("%s: failed to initialize bank", bank->name);
+ return retval;
+ }
+
+ esirisc_info->probed = true;
+
+ return ERROR_OK;
+}
+
+static int esirisc_flash_auto_probe(struct flash_bank *bank)
+{
+ struct esirisc_flash_bank *esirisc_info = bank->driver_priv;
+
+ if (esirisc_info->probed)
+ return ERROR_OK;
+
+ return esirisc_flash_probe(bank);
+}
+
+static int esirisc_flash_protect_check(struct flash_bank *bank)
+{
+ struct esirisc_flash_bank *esirisc_info = bank->driver_priv;
+ struct target *target = bank->target;
+ uint32_t control;
+
+ if (target->state != TARGET_HALTED)
+ return ERROR_TARGET_NOT_HALTED;
+
+ target_read_u32(target, esirisc_info->cfg + CONTROL, &control);
+
+ /* single protection block (also see: esirisc_flash_probe()) */
+ bank->prot_blocks[0].is_protected = !!(control & CONTROL_WP);
+
+ return ERROR_OK;
+}
+
+static int esirisc_flash_info(struct flash_bank *bank, char *buf, int buf_size)
+{
+ struct esirisc_flash_bank *esirisc_info = bank->driver_priv;
+
+ snprintf(buf, buf_size,
+ "%4s cfg at 0x%" PRIx32 ", clock %" PRId32 ", wait_states %" PRId32,
+ "", /* align with first line */
+ esirisc_info->cfg,
+ esirisc_info->clock,
+ esirisc_info->wait_states);
+
+ return ERROR_OK;
+}
+
+COMMAND_HANDLER(handle_esirisc_flash_mass_erase_command)
+{
+ struct flash_bank *bank;
+ int retval;
+
+ if (CMD_ARGC < 1)
+ return ERROR_COMMAND_SYNTAX_ERROR;
+
+ retval = CALL_COMMAND_HANDLER(flash_command_get_bank, 0, &bank);
+ if (retval != ERROR_OK)
+ return retval;
+
+ retval = esirisc_flash_mass_erase(bank);
+
+ command_print(CMD_CTX, "mass erase %s",
+ (retval == ERROR_OK) ? "successful" : "failed");
+
+ return retval;
+}
+
+COMMAND_HANDLER(handle_esirisc_flash_ref_erase_command)
+{
+ struct flash_bank *bank;
+ int retval;
+
+ if (CMD_ARGC < 1)
+ return ERROR_COMMAND_SYNTAX_ERROR;
+
+ retval = CALL_COMMAND_HANDLER(flash_command_get_bank, 0, &bank);
+ if (retval != ERROR_OK)
+ return retval;
+
+ retval = esirisc_flash_ref_erase(bank);
+
+ command_print(CMD_CTX, "erase reference cell %s",
+ (retval == ERROR_OK) ? "successful" : "failed");
+
+ return retval;
+}
+
+static const struct command_registration esirisc_flash_exec_command_handlers[] = {
+ {
+ .name = "mass_erase",
+ .handler = handle_esirisc_flash_mass_erase_command,
+ .mode = COMMAND_EXEC,
+ .help = "erases all pages in data memory",
+ .usage = "bank_id",
+ },
+ {
+ .name = "ref_erase",
+ .handler = handle_esirisc_flash_ref_erase_command,
+ .mode = COMMAND_EXEC,
+ .help = "erases reference cell (uncommon)",
+ .usage = "bank_id",
+ },
+ COMMAND_REGISTRATION_DONE
+};
+
+static const struct command_registration esirisc_flash_command_handlers[] = {
+ {
+ .name = "esirisc_flash",
+ .mode = COMMAND_ANY,
+ .help = "eSi-RISC flash command group",
+ .usage = "",
+ .chain = esirisc_flash_exec_command_handlers,
+ },
+ COMMAND_REGISTRATION_DONE
+};
+
+struct flash_driver esirisc_flash = {
+ .name = "esirisc",
+ .commands = esirisc_flash_command_handlers,
+ .usage = "flash bank bank_id 'esirisc' base_address size_bytes 0 0 target "
+ "cfg_address clock_hz wait_states",
+ .flash_bank_command = esirisc_flash_bank_command,
+ .erase = esirisc_flash_erase,
+ .protect = esirisc_flash_protect,
+ .write = esirisc_flash_write,
+ .read = default_flash_read,
+ .probe = esirisc_flash_probe,
+ .auto_probe = esirisc_flash_auto_probe,
+ .erase_check = default_flash_blank_check,
+ .protect_check = esirisc_flash_protect_check,
+ .info = esirisc_flash_info,
+};
#include <rtos/rtos.h>
#include <rtos/rtos_standard_stackings.h>
#include <target/armv7m.h>
+#include <target/esirisc.h>
static const struct stack_register_offset rtos_uCOS_III_Cortex_M_stack_offsets[] = {
{ ARMV7M_R0, 0x20, 32 }, /* r0 */
{ ARMV7M_xPSR, 0x3c, 32 }, /* xPSR */
};
+static const struct stack_register_offset rtos_uCOS_III_eSi_RISC_stack_offsets[] = {
+ { ESIRISC_SP, -2, 32 }, /* sp */
+ { ESIRISC_RA, 0x48, 32 }, /* ra */
+ { ESIRISC_R2, 0x44, 32 }, /* r2 */
+ { ESIRISC_R3, 0x40, 32 }, /* r3 */
+ { ESIRISC_R4, 0x3c, 32 }, /* r4 */
+ { ESIRISC_R5, 0x38, 32 }, /* r5 */
+ { ESIRISC_R6, 0x34, 32 }, /* r6 */
+ { ESIRISC_R7, 0x30, 32 }, /* r7 */
+ { ESIRISC_R8, 0x2c, 32 }, /* r8 */
+ { ESIRISC_R9, 0x28, 32 }, /* r9 */
+ { ESIRISC_R10, 0x24, 32 }, /* r10 */
+ { ESIRISC_R11, 0x20, 32 }, /* r11 */
+ { ESIRISC_R12, 0x1c, 32 }, /* r12 */
+ { ESIRISC_R13, 0x18, 32 }, /* r13 */
+ { ESIRISC_R14, 0x14, 32 }, /* r14 */
+ { ESIRISC_R15, 0x10, 32 }, /* r15 */
+ { ESIRISC_PC, 0x04, 32 }, /* PC */
+ { ESIRISC_CAS, 0x08, 32 }, /* CAS */
+};
+
const struct rtos_register_stacking rtos_uCOS_III_Cortex_M_stacking = {
0x40, /* stack_registers_size */
-1, /* stack_growth_direction */
rtos_generic_stack_align8, /* stack_alignment */
rtos_uCOS_III_Cortex_M_stack_offsets /* register_offsets */
};
+
+const struct rtos_register_stacking rtos_uCOS_III_eSi_RISC_stacking = {
+ 0x4c, /* stack_registers_size */
+ -1, /* stack_growth_direction */
+ ARRAY_SIZE(rtos_uCOS_III_eSi_RISC_stack_offsets), /* num_output_registers */
+ NULL, /* stack_alignment */
+ rtos_uCOS_III_eSi_RISC_stack_offsets /* register_offsets */
+};
#include <rtos/rtos.h>
extern const struct rtos_register_stacking rtos_uCOS_III_Cortex_M_stacking;
+extern const struct rtos_register_stacking rtos_uCOS_III_eSi_RISC_stacking;
#endif /* OPENOCD_RTOS_RTOS_UCOS_III_STACKINGS_H */
&rtos_uCOS_III_Cortex_M_stacking, /* stacking_info */
0, /* num_threads */
},
+ {
+ "esirisc", /* target_name */
+ sizeof(uint32_t), /* pointer_width */
+ 0, /* thread_stack_offset */
+ 0, /* thread_name_offset */
+ 0, /* thread_state_offset */
+ 0, /* thread_priority_offset */
+ 0, /* thread_prev_offset */
+ 0, /* thread_next_offset */
+ false, /* thread_offsets_updated */
+ 1, /* threadid_start */
+ &rtos_uCOS_III_eSi_RISC_stacking, /* stacking_info */
+ 0, /* num_threads */
+ },
};
static const char * const uCOS_III_symbol_list[] = {
$(NDS32_SRC) \
$(STM8_SRC) \
$(INTEL_IA32_SRC) \
+ $(ESIRISC_SRC) \
%D%/avrt.c \
%D%/dsp563xx.c \
%D%/dsp563xx_once.c \
%D%/lakemont.c \
%D%/x86_32_common.c
+ESIRISC_SRC = \
+ %D%/esirisc.c \
+ %D%/esirisc_jtag.c
+
%C%_libtarget_la_SOURCES += \
%D%/algorithm.h \
%D%/arm.h \
%D%/stm8.h \
%D%/lakemont.h \
%D%/x86_32_common.h \
- %D%/arm_cti.h
+ %D%/arm_cti.h \
+ %D%/esirisc.h \
+ %D%/esirisc_jtag.h \
+ %D%/esirisc_regs.h
include %D%/openrisc/Makefile.am
include %D%/riscv/Makefile.am
--- /dev/null
+/***************************************************************************
+ * 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/>. *
+ ***************************************************************************/
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <helper/binarybuffer.h>
+#include <helper/command.h>
+#include <helper/log.h>
+#include <helper/time_support.h>
+#include <helper/types.h>
+#include <jtag/interface.h>
+#include <target/breakpoints.h>
+#include <target/register.h>
+#include <target/target.h>
+#include <target/target_type.h>
+
+#include "esirisc.h"
+
+#define RESET_TIMEOUT 5000 /* 5s */
+#define STEP_TIMEOUT 1000 /* 1s */
+
+/*
+ * eSi-RISC targets support a configurable number of interrupts;
+ * up to 32 interrupts are supported.
+ */
+static const char * const esirisc_exceptions[] = {
+ "Reset", "HardwareFailure", "NMI", "InstBreakpoint", "DataBreakpoint",
+ "Unsupported", "PrivilegeViolation", "InstBusError", "DataBusError",
+ "AlignmentError", "ArithmeticError", "SystemCall", "MemoryManagement",
+ "Unrecoverable", "Reserved",
+
+ "Interrupt0", "Interrupt1", "Interrupt2", "Interrupt3",
+ "Interrupt4", "Interrupt5", "Interrupt6", "Interrupt7",
+ "Interrupt8", "Interrupt9", "Interrupt10", "Interrupt11",
+ "Interrupt12", "Interrupt13", "Interrupt14", "Interrupt15",
+ "Interrupt16", "Interrupt17", "Interrupt18", "Interrupt19",
+ "Interrupt20", "Interrupt21", "Interrupt22", "Interrupt23",
+ "Interrupt24", "Interrupt25", "Interrupt26", "Interrupt27",
+ "Interrupt28", "Interrupt29", "Interrupt30", "Interrupt31",
+};
+
+/*
+ * eSi-RISC targets support a configurable number of general purpose
+ * registers; 8, 16, and 32 registers are supported.
+ */
+static const struct {
+ enum esirisc_reg_num number;
+ const char *name;
+ enum reg_type type;
+ const char *group;
+} esirisc_regs[] = {
+ { ESIRISC_SP, "sp", REG_TYPE_DATA_PTR, "general" },
+ { ESIRISC_RA, "ra", REG_TYPE_INT, "general" },
+ { ESIRISC_R2, "r2", REG_TYPE_INT, "general" },
+ { ESIRISC_R3, "r3", REG_TYPE_INT, "general" },
+ { ESIRISC_R4, "r4", REG_TYPE_INT, "general" },
+ { ESIRISC_R5, "r5", REG_TYPE_INT, "general" },
+ { ESIRISC_R6, "r6", REG_TYPE_INT, "general" },
+ { ESIRISC_R7, "r7", REG_TYPE_INT, "general" },
+ { ESIRISC_R8, "r8", REG_TYPE_INT, "general" },
+ { ESIRISC_R9, "r9", REG_TYPE_INT, "general" },
+ { ESIRISC_R10, "r10", REG_TYPE_INT, "general" },
+ { ESIRISC_R11, "r11", REG_TYPE_INT, "general" },
+ { ESIRISC_R12, "r12", REG_TYPE_INT, "general" },
+ { ESIRISC_R13, "r13", REG_TYPE_INT, "general" },
+ { ESIRISC_R14, "r14", REG_TYPE_INT, "general" },
+ { ESIRISC_R15, "r15", REG_TYPE_INT, "general" },
+ { ESIRISC_R16, "r16", REG_TYPE_INT, "general" },
+ { ESIRISC_R17, "r17", REG_TYPE_INT, "general" },
+ { ESIRISC_R18, "r18", REG_TYPE_INT, "general" },
+ { ESIRISC_R19, "r19", REG_TYPE_INT, "general" },
+ { ESIRISC_R20, "r20", REG_TYPE_INT, "general" },
+ { ESIRISC_R21, "r21", REG_TYPE_INT, "general" },
+ { ESIRISC_R22, "r22", REG_TYPE_INT, "general" },
+ { ESIRISC_R23, "r23", REG_TYPE_INT, "general" },
+ { ESIRISC_R24, "r24", REG_TYPE_INT, "general" },
+ { ESIRISC_R25, "r25", REG_TYPE_INT, "general" },
+ { ESIRISC_R26, "r26", REG_TYPE_INT, "general" },
+ { ESIRISC_R27, "r27", REG_TYPE_INT, "general" },
+ { ESIRISC_R28, "r28", REG_TYPE_INT, "general" },
+ { ESIRISC_R29, "r29", REG_TYPE_INT, "general" },
+ { ESIRISC_R30, "r30", REG_TYPE_INT, "general" },
+ { ESIRISC_R31, "r31", REG_TYPE_INT, "general" },
+};
+
+/*
+ * Control and Status Registers (CSRs) are largely defined as belonging
+ * to the system register group. The exception to this rule are the PC
+ * and CAS registers, which belong to the general group. While debug is
+ * active, EPC, ECAS, and ETC must be used to read and write the PC,
+ * CAS, and TC CSRs, respectively.
+ */
+static const struct {
+ enum esirisc_reg_num number;
+ uint8_t bank;
+ uint8_t csr;
+ const char *name;
+ enum reg_type type;
+ const char *group;
+} esirisc_csrs[] = {
+ { ESIRISC_PC, CSR_THREAD, CSR_THREAD_EPC, "PC", REG_TYPE_CODE_PTR, "general" }, /* PC -> EPC */
+ { ESIRISC_CAS, CSR_THREAD, CSR_THREAD_ECAS, "CAS", REG_TYPE_INT, "general" }, /* CAS -> ECAS */
+ { ESIRISC_TC, CSR_THREAD, CSR_THREAD_ETC, "TC", REG_TYPE_INT, "system" }, /* TC -> ETC */
+ { ESIRISC_ETA, CSR_THREAD, CSR_THREAD_ETA, "ETA", REG_TYPE_INT, "system" },
+ { ESIRISC_ETC, CSR_THREAD, CSR_THREAD_ETC, "ETC", REG_TYPE_INT, "system" },
+ { ESIRISC_EPC, CSR_THREAD, CSR_THREAD_EPC, "EPC", REG_TYPE_CODE_PTR, "system" },
+ { ESIRISC_ECAS, CSR_THREAD, CSR_THREAD_ECAS, "ECAS", REG_TYPE_INT, "system" },
+ { ESIRISC_EID, CSR_THREAD, CSR_THREAD_EID, "EID", REG_TYPE_INT, "system" },
+ { ESIRISC_ED, CSR_THREAD, CSR_THREAD_ED, "ED", REG_TYPE_INT, "system" },
+ { ESIRISC_IP, CSR_INTERRUPT, CSR_INTERRUPT_IP, "IP", REG_TYPE_INT, "system"},
+ { ESIRISC_IM, CSR_INTERRUPT, CSR_INTERRUPT_IM, "IM", REG_TYPE_INT, "system"},
+ { ESIRISC_IS, CSR_INTERRUPT, CSR_INTERRUPT_IS, "IS", REG_TYPE_INT, "system"},
+ { ESIRISC_IT, CSR_INTERRUPT, CSR_INTERRUPT_IT, "IT", REG_TYPE_INT, "system"},
+};
+
+static int esirisc_disable_interrupts(struct target *target)
+{
+ struct esirisc_common *esirisc = target_to_esirisc(target);
+ struct esirisc_jtag *jtag_info = &esirisc->jtag_info;
+ uint32_t etc;
+ int retval;
+
+ LOG_DEBUG("-");
+
+ retval = esirisc_jtag_read_csr(jtag_info, CSR_THREAD, CSR_THREAD_ETC, &etc);
+ if (retval != ERROR_OK) {
+ LOG_ERROR("%s: failed to read CSR: ETC", target_name(target));
+ return retval;
+ }
+
+ etc &= ~(1<<0); /* TC.I */
+
+ retval = esirisc_jtag_write_csr(jtag_info, CSR_THREAD, CSR_THREAD_ETC, etc);
+ if (retval != ERROR_OK) {
+ LOG_ERROR("%s: failed to write CSR: ETC", target_name(target));
+ return retval;
+ }
+
+ return ERROR_OK;
+}
+
+#if 0
+static int esirisc_enable_interrupts(struct target *target)
+{
+ struct esirisc_common *esirisc = target_to_esirisc(target);
+ struct esirisc_jtag *jtag_info = &esirisc->jtag_info;
+ uint32_t etc;
+ int retval;
+
+ LOG_DEBUG("-");
+
+ retval = esirisc_jtag_read_csr(jtag_info, CSR_THREAD, CSR_THREAD_ETC, &etc);
+ if (retval != ERROR_OK) {
+ LOG_ERROR("%s: failed to read CSR: ETC", target_name(target));
+ return retval;
+ }
+
+ etc |= (1<<0); /* TC.I */
+
+ retval = esirisc_jtag_write_csr(jtag_info, CSR_THREAD, CSR_THREAD_ETC, etc);
+ if (retval != ERROR_OK) {
+ LOG_ERROR("%s: failed to write CSR: ETC", target_name(target));
+ return retval;
+ }
+
+ return ERROR_OK;
+}
+#endif
+
+static int esirisc_save_interrupts(struct target *target)
+{
+ struct esirisc_common *esirisc = target_to_esirisc(target);
+ struct esirisc_jtag *jtag_info = &esirisc->jtag_info;
+
+ LOG_DEBUG("-");
+
+ int retval = esirisc_jtag_read_csr(jtag_info, CSR_THREAD, CSR_THREAD_ETC,
+ &esirisc->etc_save);
+ if (retval != ERROR_OK) {
+ LOG_ERROR("%s: failed to read CSR: ETC", target_name(target));
+ return retval;
+ }
+
+ return ERROR_OK;
+}
+
+static int esirisc_restore_interrupts(struct target *target)
+{
+ struct esirisc_common *esirisc = target_to_esirisc(target);
+ struct esirisc_jtag *jtag_info = &esirisc->jtag_info;
+
+ LOG_DEBUG("-");
+
+ int retval = esirisc_jtag_write_csr(jtag_info, CSR_THREAD, CSR_THREAD_ETC,
+ esirisc->etc_save);
+ if (retval != ERROR_OK) {
+ LOG_ERROR("%s: failed to write CSR: ETC", target_name(target));
+ return retval;
+ }
+
+ return ERROR_OK;
+}
+
+#if 0
+static int esirisc_save_hwdc(struct target *target)
+{
+ struct esirisc_common *esirisc = target_to_esirisc(target);
+ struct esirisc_jtag *jtag_info = &esirisc->jtag_info;
+
+ LOG_DEBUG("-");
+
+ int retval = esirisc_jtag_read_csr(jtag_info, CSR_DEBUG, CSR_DEBUG_HWDC,
+ &esirisc->hwdc_save);
+ if (retval != ERROR_OK) {
+ LOG_ERROR("%s: failed to read CSR: HWDC", target_name(target));
+ return retval;
+ }
+
+ return ERROR_OK;
+}
+#endif
+
+static int esirisc_restore_hwdc(struct target *target)
+{
+ struct esirisc_common *esirisc = target_to_esirisc(target);
+ struct esirisc_jtag *jtag_info = &esirisc->jtag_info;
+
+ LOG_DEBUG("-");
+
+ int retval = esirisc_jtag_write_csr(jtag_info, CSR_DEBUG, CSR_DEBUG_HWDC,
+ esirisc->hwdc_save);
+ if (retval != ERROR_OK) {
+ LOG_ERROR("%s: failed to write CSR: HWDC", target_name(target));
+ return retval;
+ }
+
+ return ERROR_OK;
+}
+
+static int esirisc_save_context(struct target *target)
+{
+ struct esirisc_common *esirisc = target_to_esirisc(target);
+
+ LOG_DEBUG("-");
+
+ for (unsigned i = 0; i < esirisc->reg_cache->num_regs; ++i) {
+ struct reg *reg = esirisc->reg_cache->reg_list + i;
+ struct esirisc_reg *reg_info = reg->arch_info;
+
+ if (reg->exist && !reg->valid)
+ reg_info->read(reg);
+ }
+
+ return ERROR_OK;
+}
+
+static int esirisc_restore_context(struct target *target)
+{
+ struct esirisc_common *esirisc = target_to_esirisc(target);
+
+ LOG_DEBUG("-");
+
+ for (unsigned i = 0; i < esirisc->reg_cache->num_regs; ++i) {
+ struct reg *reg = esirisc->reg_cache->reg_list + i;
+ struct esirisc_reg *reg_info = reg->arch_info;
+
+ if (reg->exist && reg->dirty)
+ reg_info->write(reg);
+ }
+
+ return ERROR_OK;
+}
+
+static int esirisc_flush_caches(struct target *target)
+{
+ struct esirisc_common *esirisc = target_to_esirisc(target);
+ struct esirisc_jtag *jtag_info = &esirisc->jtag_info;
+
+ LOG_DEBUG("-");
+
+ if (target->state != TARGET_HALTED)
+ return ERROR_TARGET_NOT_HALTED;
+
+ int retval = esirisc_jtag_flush_caches(jtag_info);
+ if (retval != ERROR_OK) {
+ LOG_ERROR("%s: failed to flush caches", target_name(target));
+ return retval;
+ }
+
+ return ERROR_OK;
+}
+
+static int esirisc_wait_debug_active(struct esirisc_common *esirisc, int ms)
+{
+ struct esirisc_jtag *jtag_info = &esirisc->jtag_info;
+ int64_t t;
+
+ LOG_DEBUG("-");
+
+ t = timeval_ms();
+ for (;;) {
+ int retval = esirisc_jtag_enable_debug(jtag_info);
+ if (retval == ERROR_OK && esirisc_jtag_is_debug_active(jtag_info))
+ return retval;
+
+ if ((timeval_ms() - t) > ms)
+ return ERROR_TARGET_TIMEOUT;
+
+ alive_sleep(100);
+ }
+}
+
+static int esirisc_read_memory(struct target *target, target_addr_t address,
+ uint32_t size, uint32_t count, uint8_t *buffer)
+{
+ struct esirisc_common *esirisc = target_to_esirisc(target);
+ struct esirisc_jtag *jtag_info = &esirisc->jtag_info;
+ int retval;
+
+ LOG_DEBUG("-");
+
+ int num_bits = 8 * size;
+ for (uint32_t i = 0; i < count; ++i) {
+ union esirisc_memory value;
+ void *value_p;
+
+ switch (size) {
+ case sizeof(value.word):
+ value_p = &value.word;
+ retval = esirisc_jtag_read_word(jtag_info, address, value_p);
+ break;
+
+ case sizeof(value.hword):
+ value_p = &value.hword;
+ retval = esirisc_jtag_read_hword(jtag_info, address, value_p);
+ break;
+
+ case sizeof(value.byte):
+ value_p = &value.byte;
+ retval = esirisc_jtag_read_byte(jtag_info, address, value_p);
+ break;
+
+ default:
+ LOG_ERROR("%s: unsupported size: %" PRIu32, target_name(target), size);
+ return ERROR_FAIL;
+ }
+
+ if (retval != ERROR_OK) {
+ LOG_ERROR("%s: failed to read address: 0x%" TARGET_PRIxADDR, target_name(target),
+ address);
+ return retval;
+ }
+
+ buf_cpy(value_p, buffer, num_bits);
+ address += size;
+ buffer += size;
+ }
+
+ return ERROR_OK;
+}
+
+static int esirisc_write_memory(struct target *target, target_addr_t address,
+ uint32_t size, uint32_t count, const uint8_t *buffer)
+{
+ struct esirisc_common *esirisc = target_to_esirisc(target);
+ struct esirisc_jtag *jtag_info = &esirisc->jtag_info;
+ int retval;
+
+ LOG_DEBUG("-");
+
+ int num_bits = 8 * size;
+ for (uint32_t i = 0; i < count; ++i) {
+ union esirisc_memory value;
+
+ switch (size) {
+ case sizeof(value.word):
+ value.word = buf_get_u32(buffer, 0, num_bits);
+ retval = esirisc_jtag_write_word(jtag_info, address, value.word);
+ break;
+
+ case sizeof(value.hword):
+ value.hword = buf_get_u32(buffer, 0, num_bits);
+ retval = esirisc_jtag_write_hword(jtag_info, address, value.hword);
+ break;
+
+ case sizeof(value.byte):
+ value.byte = buf_get_u32(buffer, 0, num_bits);
+ retval = esirisc_jtag_write_byte(jtag_info, address, value.byte);
+ break;
+
+ default:
+ LOG_ERROR("%s: unsupported size: %" PRIu32, target_name(target), size);
+ return ERROR_FAIL;
+ }
+
+ if (retval != ERROR_OK) {
+ LOG_ERROR("%s: failed to write address: 0x%" TARGET_PRIxADDR, target_name(target),
+ address);
+ return retval;
+ }
+
+ address += size;
+ buffer += size;
+ }
+
+ return ERROR_OK;
+}
+
+static int esirisc_checksum_memory(struct target *target, target_addr_t address,
+ uint32_t count, uint32_t *checksum)
+{
+ return ERROR_FAIL; /* not supported */
+}
+
+static int esirisc_next_breakpoint(struct target *target)
+{
+ struct esirisc_common *esirisc = target_to_esirisc(target);
+ struct breakpoint **breakpoints_p = esirisc->breakpoints_p;
+ struct breakpoint **breakpoints_e = breakpoints_p + esirisc->num_breakpoints;
+
+ LOG_DEBUG("-");
+
+ for (int bp_index = 0; breakpoints_p < breakpoints_e; ++breakpoints_p, ++bp_index)
+ if (*breakpoints_p == NULL)
+ return bp_index;
+
+ return -1;
+}
+
+static int esirisc_add_breakpoint(struct target *target, struct breakpoint *breakpoint)
+{
+ struct esirisc_common *esirisc = target_to_esirisc(target);
+ struct esirisc_jtag *jtag_info = &esirisc->jtag_info;
+ int bp_index;
+ uint32_t ibc;
+ int retval;
+
+ LOG_DEBUG("-");
+
+ /*
+ * The default linker scripts provided by the eSi-RISC toolchain do
+ * not specify attributes on memory regions, which results in
+ * incorrect application of software breakpoints by GDB. Targets
+ * must be configured with `gdb_breakpoint_override hard` as
+ * software breakpoints are not supported.
+ */
+ if (breakpoint->type != BKPT_HARD)
+ return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
+
+ bp_index = esirisc_next_breakpoint(target);
+ if (bp_index < 0) {
+ LOG_ERROR("%s: out of hardware breakpoints", target_name(target));
+ return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
+ }
+
+ breakpoint->set = bp_index + 1;
+ esirisc->breakpoints_p[bp_index] = breakpoint;
+
+ /* specify instruction breakpoint address */
+ retval = esirisc_jtag_write_csr(jtag_info, CSR_DEBUG, CSR_DEBUG_IBAn + bp_index,
+ breakpoint->address);
+ if (retval != ERROR_OK) {
+ LOG_ERROR("%s: failed to write CSR: IBA", target_name(target));
+ return retval;
+ }
+
+ /* enable instruction breakpoint */
+ retval = esirisc_jtag_read_csr(jtag_info, CSR_DEBUG, CSR_DEBUG_IBC, &ibc);
+ if (retval != ERROR_OK) {
+ LOG_ERROR("%s: failed to read CSR: IBC", target_name(target));
+ return retval;
+ }
+
+ ibc |= (1 << bp_index); /* IBC.In */
+
+ retval = esirisc_jtag_write_csr(jtag_info, CSR_DEBUG, CSR_DEBUG_IBC, ibc);
+ if (retval != ERROR_OK) {
+ LOG_ERROR("%s: failed to write CSR: IBC", target_name(target));
+ return retval;
+ }
+
+ return ERROR_OK;
+}
+
+static int esirisc_add_breakpoints(struct target *target)
+{
+ struct breakpoint *breakpoint = target->breakpoints;
+
+ LOG_DEBUG("-");
+
+ while (breakpoint != NULL) {
+ if (breakpoint->set == 0)
+ esirisc_add_breakpoint(target, breakpoint);
+
+ breakpoint = breakpoint->next;
+ }
+
+ return ERROR_OK;
+}
+
+static int esirisc_remove_breakpoint(struct target *target, struct breakpoint *breakpoint)
+{
+ struct esirisc_common *esirisc = target_to_esirisc(target);
+ struct esirisc_jtag *jtag_info = &esirisc->jtag_info;
+ int bp_index = breakpoint->set - 1;
+ uint32_t ibc;
+ int retval;
+
+ LOG_DEBUG("-");
+
+ /* disable instruction breakpoint */
+ retval = esirisc_jtag_read_csr(jtag_info, CSR_DEBUG, CSR_DEBUG_IBC, &ibc);
+ if (retval != ERROR_OK) {
+ LOG_ERROR("%s: failed to read CSR: IBC", target_name(target));
+ return retval;
+ }
+
+ ibc &= ~(1 << bp_index); /* IBC.In */
+
+ retval = esirisc_jtag_write_csr(jtag_info, CSR_DEBUG, CSR_DEBUG_IBC, ibc);
+ if (retval != ERROR_OK) {
+ LOG_ERROR("%s: failed to write CSR: IBC", target_name(target));
+ return retval;
+ }
+
+ esirisc->breakpoints_p[bp_index] = NULL;
+ breakpoint->set = 0;
+
+ return ERROR_OK;
+}
+
+static int esirisc_remove_breakpoints(struct target *target)
+{
+ struct esirisc_common *esirisc = target_to_esirisc(target);
+ struct esirisc_jtag *jtag_info = &esirisc->jtag_info;
+
+ LOG_DEBUG("-");
+
+ /* clear instruction breakpoints */
+ int retval = esirisc_jtag_write_csr(jtag_info, CSR_DEBUG, CSR_DEBUG_IBC, 0);
+ if (retval != ERROR_OK) {
+ LOG_ERROR("%s: failed to write CSR: IBC", target_name(target));
+ return retval;
+ }
+
+ memset(esirisc->breakpoints_p, 0, sizeof(esirisc->breakpoints_p));
+
+ return ERROR_OK;
+}
+
+static int esirisc_next_watchpoint(struct target *target)
+{
+ struct esirisc_common *esirisc = target_to_esirisc(target);
+ struct watchpoint **watchpoints_p = esirisc->watchpoints_p;
+ struct watchpoint **watchpoints_e = watchpoints_p + esirisc->num_watchpoints;
+
+ LOG_DEBUG("-");
+
+ for (int wp_index = 0; watchpoints_p < watchpoints_e; ++watchpoints_p, ++wp_index)
+ if (*watchpoints_p == NULL)
+ return wp_index;
+
+ return -1;
+}
+
+static int esirisc_add_watchpoint(struct target *target, struct watchpoint *watchpoint)
+{
+ struct esirisc_common *esirisc = target_to_esirisc(target);
+ struct esirisc_jtag *jtag_info = &esirisc->jtag_info;
+ int wp_index;
+ uint32_t dbs, dbc;
+ int retval;
+
+ LOG_DEBUG("-");
+
+ wp_index = esirisc_next_watchpoint(target);
+ if (wp_index < 0) {
+ LOG_ERROR("%s: out of hardware watchpoints", target_name(target));
+ return ERROR_FAIL;
+ }
+
+ watchpoint->set = wp_index + 1;
+ esirisc->watchpoints_p[wp_index] = watchpoint;
+
+ /* specify data breakpoint address */
+ retval = esirisc_jtag_write_csr(jtag_info, CSR_DEBUG, CSR_DEBUG_DBAn + wp_index,
+ watchpoint->address);
+ if (retval != ERROR_OK) {
+ LOG_ERROR("%s: failed to write CSR: DBA", target_name(target));
+ return retval;
+ }
+
+ /* specify data breakpoint size */
+ retval = esirisc_jtag_read_csr(jtag_info, CSR_DEBUG, CSR_DEBUG_DBS, &dbs);
+ if (retval != ERROR_OK) {
+ LOG_ERROR("%s: failed to read CSR: DBS", target_name(target));
+ return retval;
+ }
+
+ uint32_t sn;
+ switch (watchpoint->length) {
+ case sizeof(uint64_t):
+ sn = 0x3;
+ break;
+ case sizeof(uint32_t):
+ sn = 0x2;
+ break;
+
+ case sizeof(uint16_t):
+ sn = 0x1;
+ break;
+
+ case sizeof(uint8_t):
+ sn = 0x0;
+ break;
+
+ default:
+ LOG_ERROR("%s: unsupported length: %" PRIu32, target_name(target),
+ watchpoint->length);
+ return ERROR_FAIL;
+ }
+
+ dbs |= (sn << (2 * wp_index)); /* DBS.Sn */
+
+ retval = esirisc_jtag_write_csr(jtag_info, CSR_DEBUG, CSR_DEBUG_DBS, dbs);
+ if (retval != ERROR_OK) {
+ LOG_ERROR("%s: failed to write CSR: DBS", target_name(target));
+ return retval;
+ }
+
+ /* enable data breakpoint */
+ retval = esirisc_jtag_read_csr(jtag_info, CSR_DEBUG, CSR_DEBUG_DBC, &dbc);
+ if (retval != ERROR_OK) {
+ LOG_ERROR("%s: failed to read CSR: DBC", target_name(target));
+ return retval;
+ }
+
+ uint32_t dn;
+ switch (watchpoint->rw) {
+ case WPT_READ:
+ dn = 0x1;
+ break;
+
+ case WPT_WRITE:
+ dn = 0x2;
+ break;
+
+ case WPT_ACCESS:
+ dn = 0x3;
+ break;
+
+ default:
+ LOG_ERROR("%s: unsupported rw: %" PRId32, target_name(target),
+ watchpoint->rw);
+ return ERROR_FAIL;
+ }
+
+ dbc |= (dn << (2 * wp_index)); /* DBC.Dn */
+
+ retval = esirisc_jtag_write_csr(jtag_info, CSR_DEBUG, CSR_DEBUG_DBC, dbc);
+ if (retval != ERROR_OK) {
+ LOG_ERROR("%s: failed to write CSR: DBC", target_name(target));
+ return retval;
+ }
+
+ return ERROR_OK;
+}
+
+static int esirisc_add_watchpoints(struct target *target)
+{
+ struct watchpoint *watchpoint = target->watchpoints;
+
+ LOG_DEBUG("-");
+
+ while (watchpoint != NULL) {
+ if (watchpoint->set == 0)
+ esirisc_add_watchpoint(target, watchpoint);
+
+ watchpoint = watchpoint->next;
+ }
+
+ return ERROR_OK;
+}
+
+static int esirisc_remove_watchpoint(struct target *target, struct watchpoint *watchpoint)
+{
+ struct esirisc_common *esirisc = target_to_esirisc(target);
+ struct esirisc_jtag *jtag_info = &esirisc->jtag_info;
+ int wp_index = watchpoint->set - 1;
+ uint32_t dbc;
+ int retval;
+
+ LOG_DEBUG("-");
+
+ /* disable data breakpoint */
+ retval = esirisc_jtag_read_csr(jtag_info, CSR_DEBUG, CSR_DEBUG_DBC, &dbc);
+ if (retval != ERROR_OK) {
+ LOG_ERROR("%s: failed to read CSR: DBC", target_name(target));
+ return retval;
+ }
+
+ dbc &= ~(0x3 << (2 * wp_index)); /* DBC.Dn */
+
+ retval = esirisc_jtag_write_csr(jtag_info, CSR_DEBUG, CSR_DEBUG_DBC, dbc);
+ if (retval != ERROR_OK) {
+ LOG_ERROR("%s: failed to write CSR: DBC", target_name(target));
+ return retval;
+ }
+
+ esirisc->watchpoints_p[wp_index] = NULL;
+ watchpoint->set = 0;
+
+ return ERROR_OK;
+}
+
+static int esirisc_remove_watchpoints(struct target *target)
+{
+ struct esirisc_common *esirisc = target_to_esirisc(target);
+ struct esirisc_jtag *jtag_info = &esirisc->jtag_info;
+
+ LOG_DEBUG("-");
+
+ /* clear data breakpoints */
+ int retval = esirisc_jtag_write_csr(jtag_info, CSR_DEBUG, CSR_DEBUG_DBC, 0);
+ if (retval != ERROR_OK) {
+ LOG_ERROR("%s: failed to write CSR: DBC", target_name(target));
+ return retval;
+ }
+
+ memset(esirisc->watchpoints_p, 0, sizeof(esirisc->watchpoints_p));
+
+ return ERROR_OK;
+}
+
+static int esirisc_halt(struct target *target)
+{
+ struct esirisc_common *esirisc = target_to_esirisc(target);
+ struct esirisc_jtag *jtag_info = &esirisc->jtag_info;
+
+ LOG_DEBUG("-");
+
+ if (target->state == TARGET_HALTED)
+ return ERROR_OK;
+
+ int retval = esirisc_jtag_break(jtag_info);
+ if (retval != ERROR_OK) {
+ LOG_ERROR("%s: failed to halt target", target_name(target));
+ return retval;
+ }
+
+ target->debug_reason = DBG_REASON_DBGRQ;
+
+ return ERROR_OK;
+}
+
+static int esirisc_disable_step(struct target *target)
+{
+ struct esirisc_common *esirisc = target_to_esirisc(target);
+ struct esirisc_jtag *jtag_info = &esirisc->jtag_info;
+ uint32_t dc;
+ int retval;
+
+ LOG_DEBUG("-");
+
+ retval = esirisc_jtag_read_csr(jtag_info, CSR_DEBUG, CSR_DEBUG_DC, &dc);
+ if (retval != ERROR_OK) {
+ LOG_ERROR("%s: failed to read CSR: DC", target_name(target));
+ return retval;
+ }
+
+ dc &= ~(1<<0); /* DC.S */
+
+ retval = esirisc_jtag_write_csr(jtag_info, CSR_DEBUG, CSR_DEBUG_DC, dc);
+ if (retval != ERROR_OK) {
+ LOG_ERROR("%s: failed to write CSR: DC", target_name(target));
+ return retval;
+ }
+
+ return ERROR_OK;
+}
+
+static int esirisc_enable_step(struct target *target)
+{
+ struct esirisc_common *esirisc = target_to_esirisc(target);
+ struct esirisc_jtag *jtag_info = &esirisc->jtag_info;
+ uint32_t dc;
+ int retval;
+
+ LOG_DEBUG("-");
+
+ retval = esirisc_jtag_read_csr(jtag_info, CSR_DEBUG, CSR_DEBUG_DC, &dc);
+ if (retval != ERROR_OK) {
+ LOG_ERROR("%s: failed to read CSR: DC", target_name(target));
+ return retval;
+ }
+
+ dc |= (1<<0); /* DC.S */
+
+ retval = esirisc_jtag_write_csr(jtag_info, CSR_DEBUG, CSR_DEBUG_DC, dc);
+ if (retval != ERROR_OK) {
+ LOG_ERROR("%s: failed to write CSR: DC", target_name(target));
+ return retval;
+ }
+
+ return ERROR_OK;
+}
+
+static int esirisc_resume_or_step(struct target *target, int current, target_addr_t address,
+ int handle_breakpoints, int debug_execution, bool step)
+{
+ struct esirisc_common *esirisc = target_to_esirisc(target);
+ struct esirisc_jtag *jtag_info = &esirisc->jtag_info;
+ struct breakpoint *breakpoint = NULL;
+ int retval;
+
+ LOG_DEBUG("-");
+
+ if (target->state != TARGET_HALTED)
+ return ERROR_TARGET_NOT_HALTED;
+
+ if (!debug_execution) {
+ target_free_all_working_areas(target);
+ esirisc_add_breakpoints(target);
+ esirisc_add_watchpoints(target);
+ }
+
+ if (current)
+ address = buf_get_u32(esirisc->epc->value, 0, esirisc->epc->size);
+ else {
+ buf_set_u32(esirisc->epc->value, 0, esirisc->epc->size, address);
+ esirisc->epc->dirty = true;
+ esirisc->epc->valid = true;
+ }
+
+ esirisc_restore_context(target);
+
+ if (esirisc_has_cache(esirisc))
+ esirisc_flush_caches(target);
+
+ if (handle_breakpoints) {
+ breakpoint = breakpoint_find(target, address);
+ if (breakpoint != NULL)
+ esirisc_remove_breakpoint(target, breakpoint);
+ }
+
+ if (step) {
+ esirisc_disable_interrupts(target);
+ esirisc_enable_step(target);
+ target->debug_reason = DBG_REASON_SINGLESTEP;
+ } else {
+ esirisc_disable_step(target);
+ esirisc_restore_interrupts(target);
+ target->debug_reason = DBG_REASON_NOTHALTED;
+ }
+
+ esirisc_restore_hwdc(target);
+
+ retval = esirisc_jtag_continue(jtag_info);
+ if (retval != ERROR_OK) {
+ LOG_ERROR("%s: failed to resume target", target_name(target));
+ return retval;
+ }
+
+ register_cache_invalidate(esirisc->reg_cache);
+
+ if (!debug_execution) {
+ target->state = TARGET_RUNNING;
+ target_call_event_callbacks(target, TARGET_EVENT_RESUMED);
+ } else {
+ target->state = TARGET_DEBUG_RUNNING;
+ target_call_event_callbacks(target, TARGET_EVENT_DEBUG_RESUMED);
+ }
+
+ return ERROR_OK;
+}
+
+static int esirisc_resume(struct target *target, int current, target_addr_t address,
+ int handle_breakpoints, int debug_execution)
+{
+ LOG_DEBUG("-");
+
+ return esirisc_resume_or_step(target, current, address,
+ handle_breakpoints, debug_execution, false);
+}
+
+static int esirisc_step(struct target *target, int current, target_addr_t address,
+ int handle_breakpoints)
+{
+ LOG_DEBUG("-");
+
+ return esirisc_resume_or_step(target, current, address,
+ handle_breakpoints, 0, true);
+}
+
+static int esirisc_debug_step(struct target *target)
+{
+ struct esirisc_common *esirisc = target_to_esirisc(target);
+ struct esirisc_jtag *jtag_info = &esirisc->jtag_info;
+ int retval;
+
+ LOG_DEBUG("-");
+
+ esirisc_disable_interrupts(target);
+ esirisc_enable_step(target);
+
+ retval = esirisc_jtag_continue(jtag_info);
+ if (retval != ERROR_OK) {
+ LOG_ERROR("%s: failed to resume target", target_name(target));
+ return retval;
+ }
+
+ retval = esirisc_wait_debug_active(esirisc, STEP_TIMEOUT);
+ if (retval != ERROR_OK) {
+ LOG_ERROR("%s: step timed out", target_name(target));
+ return retval;
+ }
+
+ esirisc_disable_step(target);
+ esirisc_restore_interrupts(target);
+
+ return ERROR_OK;
+}
+
+static int esirisc_debug_reset(struct target *target)
+{
+ struct esirisc_common *esirisc = target_to_esirisc(target);
+ struct esirisc_jtag *jtag_info = &esirisc->jtag_info;
+ int retval;
+
+ LOG_DEBUG("-");
+
+ retval = esirisc_jtag_assert_reset(jtag_info);
+ if (retval != ERROR_OK) {
+ LOG_ERROR("%s: failed to assert reset", target_name(target));
+ return retval;
+ }
+
+ retval = esirisc_jtag_deassert_reset(jtag_info);
+ if (retval != ERROR_OK) {
+ LOG_ERROR("%s: failed to deassert reset", target_name(target));
+ return retval;
+ }
+
+ retval = esirisc_wait_debug_active(esirisc, RESET_TIMEOUT);
+ if (retval != ERROR_OK) {
+ LOG_ERROR("%s: reset timed out", target_name(target));
+ return retval;
+ }
+
+ return ERROR_OK;
+}
+
+static int esirisc_debug_enable(struct target *target)
+{
+ struct esirisc_common *esirisc = target_to_esirisc(target);
+ struct esirisc_jtag *jtag_info = &esirisc->jtag_info;
+ int retval;
+
+ LOG_DEBUG("-");
+
+ retval = esirisc_jtag_enable_debug(jtag_info);
+ if (retval != ERROR_OK) {
+ LOG_ERROR("%s: failed to enable debug mode", target_name(target));
+ return retval;
+ }
+
+ /*
+ * The debug clock is inactive until the first command is sent.
+ * If the target is stopped, we must first issue a reset before
+ * attempting further communication. This also handles unpowered
+ * targets, which will respond with all ones and appear active.
+ */
+ if (esirisc_jtag_is_stopped(jtag_info)) {
+ LOG_INFO("%s: debug clock inactive; attempting debug reset", target_name(target));
+ retval = esirisc_debug_reset(target);
+ if (retval != ERROR_OK)
+ return retval;
+
+ if (esirisc_jtag_is_stopped(jtag_info)) {
+ LOG_ERROR("%s: target unresponsive; giving up", target_name(target));
+ return ERROR_FAIL;
+ }
+ }
+
+ return ERROR_OK;
+}
+
+static int esirisc_debug_entry(struct target *target)
+{
+ struct esirisc_common *esirisc = target_to_esirisc(target);
+ struct breakpoint *breakpoint;
+
+ LOG_DEBUG("-");
+
+ esirisc_save_context(target);
+
+ if (esirisc_has_cache(esirisc))
+ esirisc_flush_caches(target);
+
+ if (target->debug_reason != DBG_REASON_SINGLESTEP) {
+ esirisc_save_interrupts(target);
+
+ uint32_t eid = buf_get_u32(esirisc->eid->value, 0, esirisc->eid->size);
+ switch (eid) {
+ /*
+ * InstBreakpoint exceptions are also raised when a core is
+ * halted for debugging. The following is required to
+ * determine if a breakpoint was encountered.
+ */
+ case EID_INST_BREAKPOINT:
+ breakpoint = breakpoint_find(target,
+ buf_get_u32(esirisc->epc->value, 0, esirisc->epc->size));
+ target->debug_reason = (breakpoint != NULL) ?
+ DBG_REASON_BREAKPOINT : DBG_REASON_DBGRQ;
+ break;
+
+ /*
+ * eSi-RISC treats watchpoints similarly to breakpoints,
+ * however GDB will not request to step over the current
+ * instruction when a watchpoint fires. The following is
+ * required to resume the target.
+ */
+ case EID_DATA_BREAKPOINT:
+ esirisc_remove_watchpoints(target);
+ esirisc_debug_step(target);
+ esirisc_add_watchpoints(target);
+ target->debug_reason = DBG_REASON_WATCHPOINT;
+ break;
+
+ default:
+ target->debug_reason = DBG_REASON_DBGRQ;
+ }
+ }
+
+ return ERROR_OK;
+}
+
+static int esirisc_poll(struct target *target)
+{
+ struct esirisc_common *esirisc = target_to_esirisc(target);
+ struct esirisc_jtag *jtag_info = &esirisc->jtag_info;
+ int retval;
+
+ retval = esirisc_jtag_enable_debug(jtag_info);
+ if (retval != ERROR_OK) {
+ LOG_ERROR("%s: failed to poll target", target_name(target));
+ return retval;
+ }
+
+ if (esirisc_jtag_is_stopped(jtag_info)) {
+ LOG_ERROR("%s: target has stopped; reset required", target_name(target));
+ target->state = TARGET_UNKNOWN;
+ return ERROR_TARGET_FAILURE;
+ }
+
+ if (esirisc_jtag_is_debug_active(jtag_info)) {
+ if (target->state == TARGET_RUNNING || target->state == TARGET_RESET) {
+ target->state = TARGET_HALTED;
+
+ retval = esirisc_debug_entry(target);
+ if (retval != ERROR_OK)
+ return retval;
+
+ target_call_event_callbacks(target, TARGET_EVENT_HALTED);
+ }
+
+ } else if (target->state == TARGET_HALTED || target->state == TARGET_RESET) {
+ target->state = TARGET_RUNNING;
+ target_call_event_callbacks(target, TARGET_EVENT_RESUMED);
+ }
+
+ return ERROR_OK;
+}
+
+static int esirisc_assert_reset(struct target *target)
+{
+ struct esirisc_common *esirisc = target_to_esirisc(target);
+ struct esirisc_jtag *jtag_info = &esirisc->jtag_info;
+ int retval;
+
+ LOG_DEBUG("-");
+
+ if (jtag_get_reset_config() & RESET_HAS_SRST) {
+ jtag_add_reset(1, 1);
+ if ((jtag_get_reset_config() & RESET_SRST_PULLS_TRST) == 0)
+ jtag_add_reset(0, 1);
+ } else {
+ esirisc_remove_breakpoints(target);
+ esirisc_remove_watchpoints(target);
+
+ retval = esirisc_jtag_assert_reset(jtag_info);
+ if (retval != ERROR_OK) {
+ LOG_ERROR("%s: failed to assert reset", target_name(target));
+ return retval;
+ }
+ }
+
+ target->state = TARGET_RESET;
+
+ register_cache_invalidate(esirisc->reg_cache);
+
+ return ERROR_OK;
+}
+
+static int esirisc_reset_entry(struct target *target)
+{
+ struct esirisc_common *esirisc = target_to_esirisc(target);
+ struct esirisc_jtag *jtag_info = &esirisc->jtag_info;
+ uint32_t eta, epc;
+ int retval;
+
+ LOG_DEBUG("-");
+
+ /* read exception table address */
+ retval = esirisc_jtag_read_csr(jtag_info, CSR_THREAD, CSR_THREAD_ETA, &eta);
+ if (retval != ERROR_OK) {
+ LOG_ERROR("%s: failed to read CSR: ETA", target_name(target));
+ return retval;
+ }
+
+ /* read reset entry point */
+ retval = esirisc_jtag_read_word(jtag_info, eta + ENTRY_RESET, &epc);
+ if (retval != ERROR_OK) {
+ LOG_ERROR("%s: failed to read address: 0x%" TARGET_PRIxADDR, target_name(target),
+ (target_addr_t)epc);
+ return retval;
+ }
+
+ /* write reset entry point */
+ retval = esirisc_jtag_write_csr(jtag_info, CSR_THREAD, CSR_THREAD_EPC, epc);
+ if (retval != ERROR_OK) {
+ LOG_ERROR("%s: failed to write CSR: EPC", target_name(target));
+ return retval;
+ }
+
+ return ERROR_OK;
+}
+
+static int esirisc_deassert_reset(struct target *target)
+{
+ struct esirisc_common *esirisc = target_to_esirisc(target);
+ struct esirisc_jtag *jtag_info = &esirisc->jtag_info;
+ int retval;
+
+ LOG_DEBUG("-");
+
+ if (jtag_get_reset_config() & RESET_HAS_SRST) {
+ jtag_add_reset(0, 0);
+
+ retval = esirisc_debug_enable(target);
+ if (retval != ERROR_OK)
+ return retval;
+
+ retval = esirisc_debug_reset(target);
+ if (retval != ERROR_OK)
+ return retval;
+
+ } else {
+ retval = esirisc_jtag_deassert_reset(jtag_info);
+ if (retval != ERROR_OK) {
+ LOG_ERROR("%s: failed to deassert reset", target_name(target));
+ return retval;
+ }
+ }
+
+ retval = esirisc_wait_debug_active(esirisc, RESET_TIMEOUT);
+ if (retval != ERROR_OK) {
+ LOG_ERROR("%s: reset timed out", target_name(target));
+ return retval;
+ }
+
+ retval = esirisc_reset_entry(target);
+ if (retval != ERROR_OK)
+ return retval;
+
+ esirisc_add_breakpoints(target);
+ esirisc_add_watchpoints(target);
+
+ esirisc_restore_hwdc(target);
+
+ if (!target->reset_halt) {
+ retval = esirisc_jtag_continue(jtag_info);
+ if (retval != ERROR_OK) {
+ LOG_ERROR("%s: failed to resume target", target_name(target));
+ return retval;
+ }
+ }
+
+ return ERROR_OK;
+}
+
+static int esirisc_arch_state(struct target *target)
+{
+ struct esirisc_common *esirisc = target_to_esirisc(target);
+ uint32_t epc = buf_get_u32(esirisc->epc->value, 0, esirisc->epc->size);
+ uint32_t ecas = buf_get_u32(esirisc->ecas->value, 0, esirisc->ecas->size);
+ uint32_t eid = buf_get_u32(esirisc->eid->value, 0, esirisc->eid->size);
+ uint32_t ed = buf_get_u32(esirisc->ed->value, 0, esirisc->ed->size);
+
+ LOG_DEBUG("-");
+
+ const char *exception = "Unknown";
+ if (eid < ARRAY_SIZE(esirisc_exceptions))
+ exception = esirisc_exceptions[eid];
+
+ LOG_USER("target halted due to %s, exception: %s\n"
+ "EPC: 0x%" PRIx32 " ECAS: 0x%" PRIx32 " EID: 0x%" PRIx32 " ED: 0x%" PRIx32,
+ debug_reason_name(target), exception, epc, ecas, eid, ed);
+
+ return ERROR_OK;
+}
+
+static const char *esirisc_get_gdb_arch(struct target *target)
+{
+ struct esirisc_common *esirisc = target_to_esirisc(target);
+
+ LOG_DEBUG("-");
+
+ /*
+ * Targets with the UNIFIED_ADDRESS_SPACE option disabled employ a
+ * Harvard architecture. This option is not exposed in a CSR, which
+ * requires additional configuration to properly interact with these
+ * targets in GDB (also see: `esirisc cache_arch`).
+ */
+ if (esirisc->gdb_arch == NULL && target_was_examined(target))
+ esirisc->gdb_arch = alloc_printf("esirisc:%d_bit_%d_reg_%s",
+ esirisc->num_bits, esirisc->num_regs, esirisc_cache_arch(esirisc));
+
+ return esirisc->gdb_arch;
+}
+
+static int esirisc_get_gdb_reg_list(struct target *target, struct reg **reg_list[],
+ int *reg_list_size, enum target_register_class reg_class)
+{
+ struct esirisc_common *esirisc = target_to_esirisc(target);
+
+ LOG_DEBUG("-");
+
+ *reg_list_size = ESIRISC_NUM_REGS;
+
+ *reg_list = calloc(*reg_list_size, sizeof(struct reg *));
+ if (*reg_list == NULL)
+ return ERROR_FAIL;
+
+ if (reg_class == REG_CLASS_ALL)
+ for (int i = 0; i < *reg_list_size; ++i)
+ (*reg_list)[i] = esirisc->reg_cache->reg_list + i;
+ else {
+ for (int i = 0; i < esirisc->num_regs; ++i)
+ (*reg_list)[i] = esirisc->reg_cache->reg_list + i;
+
+ (*reg_list)[ESIRISC_PC] = esirisc->reg_cache->reg_list + ESIRISC_PC;
+ (*reg_list)[ESIRISC_CAS] = esirisc->reg_cache->reg_list + ESIRISC_CAS;
+ }
+
+ return ERROR_OK;
+}
+
+static int esirisc_read_reg(struct reg *reg)
+{
+ struct esirisc_reg *reg_info = reg->arch_info;
+ struct esirisc_common *esirisc = reg_info->esirisc;
+ struct esirisc_jtag *jtag_info = &esirisc->jtag_info;
+ struct target *target = esirisc->target;
+ uint32_t data;
+
+ LOG_DEBUG("-");
+
+ int retval = esirisc_jtag_read_reg(jtag_info, reg->number, &data);
+ if (retval != ERROR_OK) {
+ LOG_ERROR("%s: failed to read register: %s", target_name(target), reg->name);
+ return retval;
+ }
+
+ buf_set_u32(reg->value, 0, reg->size, data);
+ reg->dirty = false;
+ reg->valid = true;
+
+ return ERROR_OK;
+}
+
+static int esirisc_write_reg(struct reg *reg)
+{
+ struct esirisc_reg *reg_info = reg->arch_info;
+ struct esirisc_common *esirisc = reg_info->esirisc;
+ struct esirisc_jtag *jtag_info = &esirisc->jtag_info;
+ struct target *target = esirisc->target;
+ uint32_t data = buf_get_u32(reg->value, 0, reg->size);
+
+ LOG_DEBUG("-");
+
+ int retval = esirisc_jtag_write_reg(jtag_info, reg->number, data);
+ if (retval != ERROR_OK) {
+ LOG_ERROR("%s: failed to write register: %s", target_name(target), reg->name);
+ return retval;
+ }
+
+ reg->dirty = false;
+ reg->valid = true;
+
+ return ERROR_OK;
+}
+
+static int esirisc_read_csr(struct reg *reg)
+{
+ struct esirisc_reg *reg_info = reg->arch_info;
+ struct esirisc_common *esirisc = reg_info->esirisc;
+ struct esirisc_jtag *jtag_info = &esirisc->jtag_info;
+ struct target *target = esirisc->target;
+ uint32_t data;
+
+ LOG_DEBUG("-");
+
+ int retval = esirisc_jtag_read_csr(jtag_info, reg_info->bank, reg_info->csr, &data);
+ if (retval != ERROR_OK) {
+ LOG_ERROR("%s: failed to read CSR: %s", target_name(target), reg->name);
+ return retval;
+ }
+
+ buf_set_u32(reg->value, 0, reg->size, data);
+ reg->dirty = false;
+ reg->valid = true;
+
+ return ERROR_OK;
+}
+
+static int esirisc_write_csr(struct reg *reg)
+{
+ struct esirisc_reg *reg_info = reg->arch_info;
+ struct esirisc_common *esirisc = reg_info->esirisc;
+ struct esirisc_jtag *jtag_info = &esirisc->jtag_info;
+ struct target *target = esirisc->target;
+ uint32_t data = buf_get_u32(reg->value, 0, reg->size);
+
+ LOG_DEBUG("-");
+
+ int retval = esirisc_jtag_write_csr(jtag_info, reg_info->bank, reg_info->csr, data);
+ if (retval != ERROR_OK) {
+ LOG_ERROR("%s: failed to write CSR: %s", target_name(target), reg->name);
+ return retval;
+ }
+
+ reg->dirty = false;
+ reg->valid = true;
+
+ return ERROR_OK;
+}
+
+static int esirisc_get_reg(struct reg *reg)
+{
+ struct esirisc_reg *reg_info = reg->arch_info;
+ struct esirisc_common *esirisc = reg_info->esirisc;
+ struct target *target = esirisc->target;
+
+ LOG_DEBUG("-");
+
+ if (target->state != TARGET_HALTED)
+ return ERROR_TARGET_NOT_HALTED;
+
+ return reg_info->read(reg);
+}
+
+static int esirisc_set_reg(struct reg *reg, uint8_t *buf)
+{
+ struct esirisc_reg *reg_info = reg->arch_info;
+ struct esirisc_common *esirisc = reg_info->esirisc;
+ struct target *target = esirisc->target;
+ uint32_t value = buf_get_u32(buf, 0, reg->size);
+
+ LOG_DEBUG("-");
+
+ if (target->state != TARGET_HALTED)
+ return ERROR_TARGET_NOT_HALTED;
+
+ buf_set_u32(reg->value, 0, reg->size, value);
+ reg->dirty = true;
+ reg->valid = true;
+
+ return ERROR_OK;
+}
+
+static const struct reg_arch_type esirisc_reg_type = {
+ .get = esirisc_get_reg,
+ .set = esirisc_set_reg,
+};
+
+static struct reg_cache *esirisc_build_reg_cache(struct target *target)
+{
+ struct esirisc_common *esirisc = target_to_esirisc(target);
+ struct reg_cache **cache_p = register_get_last_cache_p(&target->reg_cache);
+ struct reg_cache *cache = malloc(sizeof(struct reg_cache));
+ struct reg *reg_list = calloc(ESIRISC_NUM_REGS, sizeof(struct reg));
+
+ LOG_DEBUG("-");
+
+ cache->name = "eSi-RISC registers";
+ cache->next = NULL;
+ cache->reg_list = reg_list;
+ cache->num_regs = ESIRISC_NUM_REGS;
+ (*cache_p) = cache;
+
+ esirisc->reg_cache = cache;
+ esirisc->epc = reg_list + ESIRISC_EPC;
+ esirisc->ecas = reg_list + ESIRISC_ECAS;
+ esirisc->eid = reg_list + ESIRISC_EID;
+ esirisc->ed = reg_list + ESIRISC_ED;
+
+ for (int i = 0; i < esirisc->num_regs; ++i) {
+ struct reg *reg = reg_list + esirisc_regs[i].number;
+ struct esirisc_reg *reg_info = calloc(1, sizeof(struct esirisc_reg));
+
+ reg->name = esirisc_regs[i].name;
+ reg->number = esirisc_regs[i].number;
+ reg->value = calloc(1, DIV_ROUND_UP(esirisc->num_bits, 8));
+ reg->size = esirisc->num_bits;
+ reg->reg_data_type = calloc(1, sizeof(struct reg_data_type));
+ reg->reg_data_type->type = esirisc_regs[i].type;
+ reg->group = esirisc_regs[i].group;
+ reg_info->esirisc = esirisc;
+ reg_info->read = esirisc_read_reg;
+ reg_info->write = esirisc_write_reg;
+ reg->arch_info = reg_info;
+ reg->type = &esirisc_reg_type;
+ reg->exist = true;
+ }
+
+ for (size_t i = 0; i < ARRAY_SIZE(esirisc_csrs); ++i) {
+ struct reg *reg = reg_list + esirisc_csrs[i].number;
+ struct esirisc_reg *reg_info = calloc(1, sizeof(struct esirisc_reg));
+
+ reg->name = esirisc_csrs[i].name;
+ reg->number = esirisc_csrs[i].number;
+ reg->value = calloc(1, DIV_ROUND_UP(esirisc->num_bits, 8));
+ reg->size = esirisc->num_bits;
+ reg->reg_data_type = calloc(1, sizeof(struct reg_data_type));
+ reg->reg_data_type->type = esirisc_csrs[i].type;
+ reg->group = esirisc_csrs[i].group;
+ reg_info->esirisc = esirisc;
+ reg_info->bank = esirisc_csrs[i].bank;
+ reg_info->csr = esirisc_csrs[i].csr;
+ reg_info->read = esirisc_read_csr;
+ reg_info->write = esirisc_write_csr;
+ reg->arch_info = reg_info;
+ reg->type = &esirisc_reg_type;
+ reg->exist = true;
+ }
+
+ return cache;
+}
+
+static int esirisc_identify(struct target *target)
+{
+ struct esirisc_common *esirisc = target_to_esirisc(target);
+ struct esirisc_jtag *jtag_info = &esirisc->jtag_info;
+ uint32_t csr;
+ int retval;
+
+ LOG_DEBUG("-");
+
+ retval = esirisc_jtag_read_csr(jtag_info, CSR_CONFIG, CSR_CONFIG_ARCH0, &csr);
+ if (retval != ERROR_OK) {
+ LOG_ERROR("%s: failed to read CSR: ARCH0", target_name(target));
+ return retval;
+ }
+
+ esirisc->num_bits = (csr >> 0) & 0x3f; /* ARCH0.B */
+ esirisc->num_regs = (csr >> 10) & 0x3f; /* ARCH0.R */
+
+ retval = esirisc_jtag_read_csr(jtag_info, CSR_CONFIG, CSR_CONFIG_MEM, &csr);
+ if (retval != ERROR_OK) {
+ LOG_ERROR("%s: failed to read CSR: MEM", target_name(target));
+ return retval;
+ }
+
+ target->endianness = (csr & 1<<0) ? /* MEM.E */
+ TARGET_BIG_ENDIAN : TARGET_LITTLE_ENDIAN;
+
+ retval = esirisc_jtag_read_csr(jtag_info, CSR_CONFIG, CSR_CONFIG_IC, &csr);
+ if (retval != ERROR_OK) {
+ LOG_ERROR("%s: failed to read CSR: IC", target_name(target));
+ return retval;
+ }
+
+ esirisc->has_icache = !!(csr & 1<<0); /* IC.E */
+
+ retval = esirisc_jtag_read_csr(jtag_info, CSR_CONFIG, CSR_CONFIG_DC, &csr);
+ if (retval != ERROR_OK) {
+ LOG_ERROR("%s: failed to read CSR: DC", target_name(target));
+ return retval;
+ }
+
+ esirisc->has_dcache = !!(csr & 1<<0); /* DC.E */
+
+ retval = esirisc_jtag_read_csr(jtag_info, CSR_CONFIG, CSR_CONFIG_DBG, &csr);
+ if (retval != ERROR_OK) {
+ LOG_ERROR("%s: failed to read CSR: DBG", target_name(target));
+ return retval;
+ }
+
+ esirisc->num_breakpoints = (csr >> 7) & 0xf; /* DBG.BP */
+ esirisc->num_watchpoints = (csr >> 12) & 0xf; /* DBG.WP */
+
+ return ERROR_OK;
+}
+
+static int esirisc_target_create(struct target *target, Jim_Interp *interp)
+{
+ struct jtag_tap *tap = target->tap;
+ struct esirisc_common *esirisc;
+
+ if (tap == NULL)
+ return ERROR_FAIL;
+
+ if (tap->ir_length != INSTR_LENGTH) {
+ LOG_ERROR("%s: invalid IR length; expected %d", target_name(target),
+ INSTR_LENGTH);
+ return ERROR_FAIL;
+ }
+
+ esirisc = calloc(1, sizeof(struct esirisc_common));
+ if (esirisc == NULL)
+ return ERROR_FAIL;
+
+ esirisc->target = target;
+ esirisc->jtag_info.tap = tap;
+ target->arch_info = esirisc;
+
+ return ERROR_OK;
+}
+
+static int esirisc_init_target(struct command_context *cmd_ctx, struct target *target)
+{
+ struct esirisc_common *esirisc = target_to_esirisc(target);
+
+ /* trap reset, error, and debug exceptions */
+ esirisc->hwdc_save = HWDC_R | HWDC_E | HWDC_D;
+
+ return ERROR_OK;
+}
+
+static int esirisc_examine(struct target *target)
+{
+ struct esirisc_common *esirisc = target_to_esirisc(target);
+ struct esirisc_jtag *jtag_info = &esirisc->jtag_info;
+ int retval;
+
+ LOG_DEBUG("-");
+
+ if (!target_was_examined(target)) {
+ retval = esirisc_debug_enable(target);
+ if (retval != ERROR_OK)
+ return retval;
+
+ /*
+ * In order to identify the target we must first halt the core.
+ * We quietly resume once identification has completed for those
+ * targets that were running when target_examine was called.
+ */
+ if (esirisc_jtag_is_debug_active(jtag_info)) {
+ if (target->state == TARGET_UNKNOWN)
+ target->debug_reason = DBG_REASON_DBGRQ;
+
+ target->state = TARGET_HALTED;
+ } else {
+ retval = esirisc_jtag_break(jtag_info);
+ if (retval != ERROR_OK) {
+ LOG_ERROR("%s: failed to halt target", target_name(target));
+ return retval;
+ }
+
+ target->state = TARGET_RUNNING;
+ }
+
+ retval = esirisc_identify(target);
+ if (retval != ERROR_OK) {
+ LOG_ERROR("%s: failed to identify target", target_name(target));
+ return retval;
+ }
+
+ esirisc_build_reg_cache(target);
+
+ esirisc_remove_breakpoints(target);
+ esirisc_remove_watchpoints(target);
+
+ esirisc_disable_step(target);
+ esirisc_restore_hwdc(target);
+
+ if (target->state == TARGET_HALTED)
+ esirisc_save_interrupts(target);
+ else {
+ retval = esirisc_jtag_continue(jtag_info);
+ if (retval != ERROR_OK) {
+ LOG_ERROR("%s: failed to resume target", target_name(target));
+ return retval;
+ }
+ }
+
+ target_set_examined(target);
+
+ LOG_INFO("%s: %d bit, %d registers, %s%s%s", target_name(target),
+ esirisc->num_bits, esirisc->num_regs,
+ target_endianness(target),
+ esirisc->has_icache ? ", icache" : "",
+ esirisc->has_dcache ? ", dcache" : "");
+
+ LOG_INFO("%s: hardware has %d breakpoints, %d watchpoints", target_name(target),
+ esirisc->num_breakpoints, esirisc->num_watchpoints);
+ }
+
+ return ERROR_OK;
+}
+
+COMMAND_HANDLER(handle_esirisc_cache_arch_command)
+{
+ struct target *target = get_current_target(CMD_CTX);
+ struct esirisc_common *esirisc = target_to_esirisc(target);
+
+ if (CMD_ARGC > 0) {
+ if (strcmp(*CMD_ARGV, "harvard") == 0)
+ esirisc->cache_arch = ESIRISC_CACHE_HARVARD;
+ else if (strcmp(*CMD_ARGV, "von_neumann") == 0)
+ esirisc->cache_arch = ESIRISC_CACHE_VON_NEUMANN;
+ else {
+ LOG_ERROR("invalid cache_arch: %s", *CMD_ARGV);
+ return ERROR_COMMAND_SYNTAX_ERROR;
+ }
+ }
+
+ command_print(CMD_CTX, "esirisc cache_arch %s", esirisc_cache_arch(esirisc));
+
+ return ERROR_OK;
+}
+
+COMMAND_HANDLER(handle_esirisc_flush_caches_command)
+{
+ struct target *target = get_current_target(CMD_CTX);
+ struct esirisc_common *esirisc = target_to_esirisc(target);
+ int retval;
+
+ if (!esirisc_has_cache(esirisc)) {
+ LOG_ERROR("target does not support caching");
+ return ERROR_FAIL;
+ }
+
+ retval = esirisc_flush_caches(target);
+
+ command_print(CMD_CTX, "cache flush %s",
+ (retval == ERROR_OK) ? "successful" : "failed");
+
+ return retval;
+}
+
+static const struct {
+ const char *name;
+ int mask;
+} esirisc_hwdc_masks[] = {
+ { "reset", HWDC_R },
+ { "interrupt", HWDC_I },
+ { "syscall", HWDC_S },
+ { "error", HWDC_E },
+ { "debug", HWDC_D },
+};
+
+static int esirisc_find_hwdc_mask(const char *name)
+{
+ for (size_t i = 0; i < ARRAY_SIZE(esirisc_hwdc_masks); ++i)
+ if (strcmp(esirisc_hwdc_masks[i].name, name) == 0)
+ return esirisc_hwdc_masks[i].mask;
+
+ return -1;
+}
+
+COMMAND_HANDLER(handle_esirisc_hwdc_command)
+{
+ struct target *target = get_current_target(CMD_CTX);
+ struct esirisc_common *esirisc = target_to_esirisc(target);
+
+ if (CMD_ARGC > 0) {
+ if (strcmp(CMD_ARGV[0], "all") == 0)
+ esirisc->hwdc_save = HWDC_R | HWDC_I | HWDC_S | HWDC_E | HWDC_D;
+ else {
+ esirisc->hwdc_save = 0;
+ if (strcmp(CMD_ARGV[0], "none") != 0) {
+ while (CMD_ARGC-- > 0) {
+ int mask = esirisc_find_hwdc_mask(CMD_ARGV[CMD_ARGC]);
+ if (mask < 0) {
+ LOG_ERROR("invalid mask: %s", CMD_ARGV[CMD_ARGC]);
+ return ERROR_COMMAND_SYNTAX_ERROR;
+ }
+ esirisc->hwdc_save |= mask;
+ }
+ }
+ }
+ }
+
+ for (size_t i = 0; i < ARRAY_SIZE(esirisc_hwdc_masks); ++i)
+ command_print(CMD_CTX, "%9s: %s", esirisc_hwdc_masks[i].name,
+ (esirisc->hwdc_save & esirisc_hwdc_masks[i].mask) ? "enabled" : "disabled");
+
+ return ERROR_OK;
+}
+
+static const struct command_registration esirisc_exec_command_handlers[] = {
+ {
+ .name = "cache_arch",
+ .handler = handle_esirisc_cache_arch_command,
+ .mode = COMMAND_ANY,
+ .help = "configure cache architecture",
+ .usage = "['harvard'|'von_neumann']",
+ },
+ {
+ .name = "flush_caches",
+ .handler = handle_esirisc_flush_caches_command,
+ .mode = COMMAND_EXEC,
+ .help = "flush instruction and data caches",
+ .usage = "",
+ },
+ {
+ .name = "hwdc",
+ .handler = handle_esirisc_hwdc_command,
+ .mode = COMMAND_ANY,
+ .help = "configure hardware debug control",
+ .usage = "['all'|'none'|mask ...]",
+ },
+ COMMAND_REGISTRATION_DONE
+};
+
+static const struct command_registration esirisc_command_handlers[] = {
+ {
+ .name = "esirisc",
+ .mode = COMMAND_ANY,
+ .help = "eSi-RISC command group",
+ .usage = "",
+ .chain = esirisc_exec_command_handlers,
+ },
+ COMMAND_REGISTRATION_DONE
+};
+
+struct target_type esirisc_target = {
+ .name = "esirisc",
+
+ .poll = esirisc_poll,
+ .arch_state = esirisc_arch_state,
+
+ .halt = esirisc_halt,
+ .resume = esirisc_resume,
+ .step = esirisc_step,
+
+ .assert_reset = esirisc_assert_reset,
+ .deassert_reset = esirisc_deassert_reset,
+
+ .get_gdb_arch = esirisc_get_gdb_arch,
+ .get_gdb_reg_list = esirisc_get_gdb_reg_list,
+
+ .read_memory = esirisc_read_memory,
+ .write_memory = esirisc_write_memory,
+ .checksum_memory = esirisc_checksum_memory,
+
+ .add_breakpoint = esirisc_add_breakpoint,
+ .remove_breakpoint = esirisc_remove_breakpoint,
+ .add_watchpoint = esirisc_add_watchpoint,
+ .remove_watchpoint = esirisc_remove_watchpoint,
+
+ .commands = esirisc_command_handlers,
+
+ .target_create = esirisc_target_create,
+ .init_target = esirisc_init_target,
+ .examine = esirisc_examine,
+};
--- /dev/null
+/***************************************************************************
+ * 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_H
+#define OPENOCD_TARGET_ESIRISC_H
+
+#include <target/breakpoints.h>
+#include <target/register.h>
+#include <target/target.h>
+
+#include "esirisc_jtag.h"
+#include "esirisc_regs.h"
+
+#define MAX_BREAKPOINTS 8
+#define MAX_WATCHPOINTS 8
+
+/* Exception IDs */
+#define EID_RESET 0x00
+#define EID_HARDWARE_FAILURE 0x01
+#define EID_NMI 0x02
+#define EID_INST_BREAKPOINT 0x03
+#define EID_DATA_BREAKPOINT 0x04
+#define EID_UNSUPPORTED 0x05
+#define EID_PRIVILEGE_VIOLATION 0x06
+#define EID_INST_BUS_ERROR 0x07
+#define EID_DATA_BUS_ERROR 0x08
+#define EID_ALIGNMENT_ERROR 0x09
+#define EID_ARITHMETIC_ERROR 0x0a
+#define EID_SYSTEM_CALL 0x0b
+#define EID_MEMORY_MANAGEMENT 0x0c
+#define EID_UNRECOVERABLE 0x0d
+#define EID_INTERRUPTn 0x20
+
+/* Exception Entry Points */
+#define ENTRY_RESET 0x00
+#define ENTRY_UNRECOVERABLE 0x01
+#define ENTRY_HARDWARE_FAILURE 0x02
+#define ENTRY_RUNTIME 0x03
+#define ENTRY_MEMORY 0x04
+#define ENTRY_SYSCALL 0x05
+#define ENTRY_DEBUG 0x06
+#define ENTRY_NMI 0x07
+#define ENTRY_INTERRUPTn 0x08
+
+/* Hardware Debug Control */
+#define HWDC_R (1<<4) /* Reset & Hardware Failure */
+#define HWDC_I (1<<3) /* Interrupts */
+#define HWDC_S (1<<2) /* System Calls */
+#define HWDC_E (1<<1) /* Program Errors */
+#define HWDC_D (1<<0) /* Debug Exceptions */
+
+enum esirisc_cache {
+ ESIRISC_CACHE_VON_NEUMANN,
+ ESIRISC_CACHE_HARVARD,
+};
+
+struct esirisc_common {
+ struct target *target;
+ struct esirisc_jtag jtag_info;
+ enum esirisc_cache cache_arch;
+ char *gdb_arch;
+
+ struct reg_cache *reg_cache;
+ struct reg *epc;
+ struct reg *ecas;
+ struct reg *eid;
+ struct reg *ed;
+ uint32_t etc_save;
+ uint32_t hwdc_save;
+
+ int num_bits;
+ int num_regs;
+ bool has_icache;
+ bool has_dcache;
+ int num_breakpoints;
+ int num_watchpoints;
+
+ struct breakpoint *breakpoints_p[MAX_BREAKPOINTS];
+ struct watchpoint *watchpoints_p[MAX_WATCHPOINTS];
+};
+
+union esirisc_memory {
+ uint32_t word;
+ uint16_t hword;
+ uint8_t byte;
+};
+
+struct esirisc_reg {
+ struct esirisc_common *esirisc;
+
+ uint8_t bank;
+ uint8_t csr;
+
+ int (*read)(struct reg *reg);
+ int (*write)(struct reg *reg);
+};
+
+static inline struct esirisc_common *target_to_esirisc(struct target *target)
+{
+ return (struct esirisc_common *)target->arch_info;
+}
+
+static inline char *esirisc_cache_arch(struct esirisc_common *esirisc)
+{
+ return esirisc->cache_arch == ESIRISC_CACHE_HARVARD ? "harvard" : "von_neumann";
+}
+
+static inline bool esirisc_has_cache(struct esirisc_common *esirisc)
+{
+ return esirisc->has_icache || esirisc->has_dcache;
+}
+
+#endif /* OPENOCD_TARGET_ESIRISC_H */
--- /dev/null
+/***************************************************************************
+ * 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/>. *
+ ***************************************************************************/
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <helper/binarybuffer.h>
+#include <helper/log.h>
+#include <helper/types.h>
+#include <jtag/jtag.h>
+#include <jtag/commands.h>
+#include <jtag/interface.h>
+
+#include "esirisc_jtag.h"
+
+static void esirisc_jtag_set_instr(struct esirisc_jtag *jtag_info, uint32_t new_instr)
+{
+ struct jtag_tap *tap = jtag_info->tap;
+
+ if (buf_get_u32(tap->cur_instr, 0, tap->ir_length) != new_instr) {
+ struct scan_field field;
+ uint8_t t[4];
+
+ field.num_bits = tap->ir_length;
+ field.out_value = t;
+ buf_set_u32(t, 0, field.num_bits, new_instr);
+ field.in_value = NULL;
+
+ jtag_add_ir_scan(tap, &field, TAP_IDLE);
+ }
+}
+
+/*
+ * The data register is latched every 8 bits while in the Shift-DR state
+ * (Update-DR is not supported). This necessitates prepending padding
+ * bits to ensure data is aligned when multiple TAPs are present.
+ */
+static int esirisc_jtag_get_padding(void)
+{
+ int padding = 0;
+ int bypass_devices = 0;
+
+ for (struct jtag_tap *tap = jtag_tap_next_enabled(NULL); tap != NULL;
+ tap = jtag_tap_next_enabled(tap))
+ if (tap->bypass)
+ bypass_devices++;
+
+ int num_bits = bypass_devices % 8;
+ if (num_bits > 0)
+ padding = 8 - num_bits;
+
+ return padding;
+}
+
+static int esirisc_jtag_count_bits(int num_fields, struct scan_field *fields)
+{
+ int bit_count = 0;
+
+ for (int i = 0; i < num_fields; ++i)
+ bit_count += fields[i].num_bits;
+
+ return bit_count;
+}
+
+/*
+ * Data received from the target will be byte-stuffed if it contains
+ * either the pad byte (0xAA) or stuffing marker (0x55). Buffers should
+ * be sized twice the expected length to account for stuffing overhead.
+ */
+static void esirisc_jtag_unstuff(uint8_t *data, size_t len)
+{
+ uint8_t *r, *w;
+ uint8_t *end;
+
+ r = w = data;
+ end = data + len;
+ while (r < end) {
+ if (*r == STUFF_MARKER) {
+ r++; /* skip stuffing marker */
+ assert(r < end);
+ *w++ = *r++ ^ STUFF_MARKER;
+ } else
+ *w++ = *r++;
+ }
+}
+
+/*
+ * The eSi-Debug protocol defines a byte-oriented command/response
+ * channel that operates over serial or JTAG. While not strictly
+ * required, separate DR scans are used for sending and receiving data.
+ * This allows the TAP to recover gracefully if the byte stream is
+ * corrupted at the expense of sending additional padding bits.
+ */
+
+static int esirisc_jtag_send(struct esirisc_jtag *jtag_info, uint8_t command,
+ int num_out_fields, struct scan_field *out_fields)
+{
+ int num_fields = 2 + num_out_fields;
+ struct scan_field *fields = cmd_queue_alloc(num_fields * sizeof(struct scan_field));
+
+ esirisc_jtag_set_instr(jtag_info, INSTR_DEBUG);
+
+ fields[0].num_bits = esirisc_jtag_get_padding();
+ fields[0].out_value = NULL;
+ fields[0].in_value = NULL;
+
+ fields[1].num_bits = 8;
+ fields[1].out_value = &command;
+ fields[1].in_value = NULL;
+
+ /* append command data */
+ for (int i = 0; i < num_out_fields; ++i)
+ jtag_scan_field_clone(&fields[2+i], &out_fields[i]);
+
+ jtag_add_dr_scan(jtag_info->tap, num_fields, fields, TAP_IDLE);
+
+ return jtag_execute_queue();
+}
+
+static int esirisc_jtag_recv(struct esirisc_jtag *jtag_info,
+ int num_in_fields, struct scan_field *in_fields)
+{
+ int num_in_bits = esirisc_jtag_count_bits(num_in_fields, in_fields);
+ int num_in_bytes = DIV_ROUND_UP(num_in_bits, 8);
+
+ struct scan_field fields[3];
+ uint8_t r[num_in_bytes * 2];
+
+ esirisc_jtag_set_instr(jtag_info, INSTR_DEBUG);
+
+ fields[0].num_bits = esirisc_jtag_get_padding() + 1;
+ fields[0].out_value = NULL;
+ fields[0].in_value = NULL;
+
+ fields[1].num_bits = 8;
+ fields[1].out_value = NULL;
+ fields[1].in_value = &jtag_info->status;
+
+ fields[2].num_bits = num_in_bits * 2;
+ fields[2].out_value = NULL;
+ fields[2].in_value = r;
+
+ jtag_add_dr_scan(jtag_info->tap, ARRAY_SIZE(fields), fields, TAP_IDLE);
+
+ int retval = jtag_execute_queue();
+ if (retval != ERROR_OK)
+ return retval;
+
+ /* unstuff response data and write back to caller */
+ if (num_in_fields > 0) {
+ esirisc_jtag_unstuff(r, ARRAY_SIZE(r));
+
+ int bit_count = 0;
+ for (int i = 0; i < num_in_fields; ++i) {
+ buf_set_buf(r, bit_count, in_fields[i].in_value, 0, in_fields[i].num_bits);
+ bit_count += in_fields[i].num_bits;
+ }
+ }
+
+ return ERROR_OK;
+}
+
+static int esirisc_jtag_check_status(struct esirisc_jtag *jtag_info)
+{
+ uint8_t eid = esirisc_jtag_get_eid(jtag_info);
+ if (eid != EID_NONE) {
+ LOG_ERROR("esirisc_jtag: bad status: 0x%02" PRIx32 " (DA: %" PRId32 ", "
+ "S: %" PRId32 ", EID: 0x%02" PRIx32 ")",
+ jtag_info->status, esirisc_jtag_is_debug_active(jtag_info),
+ esirisc_jtag_is_stopped(jtag_info), eid);
+ return ERROR_FAIL;
+ }
+
+ return ERROR_OK;
+}
+
+static int esirisc_jtag_send_and_recv(struct esirisc_jtag *jtag_info, uint8_t command,
+ int num_out_fields, struct scan_field *out_fields,
+ int num_in_fields, struct scan_field *in_fields)
+{
+ int retval;
+
+ jtag_info->status = 0; /* clear status */
+
+ retval = esirisc_jtag_send(jtag_info, command, num_out_fields, out_fields);
+ if (retval != ERROR_OK) {
+ LOG_ERROR("esirisc_jtag: send failed (command: 0x%02" PRIx32 ")", command);
+ return ERROR_FAIL;
+ }
+
+ retval = esirisc_jtag_recv(jtag_info, num_in_fields, in_fields);
+ if (retval != ERROR_OK) {
+ LOG_ERROR("esirisc_jtag: recv failed (command: 0x%02" PRIx32 ")", command);
+ return ERROR_FAIL;
+ }
+
+ return esirisc_jtag_check_status(jtag_info);
+}
+
+/*
+ * Status is automatically updated after each command completes;
+ * these functions make each field available to the caller.
+ */
+
+bool esirisc_jtag_is_debug_active(struct esirisc_jtag *jtag_info)
+{
+ return !!(jtag_info->status & 1<<7); /* DA */
+}
+
+bool esirisc_jtag_is_stopped(struct esirisc_jtag *jtag_info)
+{
+ return !!(jtag_info->status & 1<<6); /* S */
+}
+
+uint8_t esirisc_jtag_get_eid(struct esirisc_jtag *jtag_info)
+{
+ return jtag_info->status & 0x3f; /* EID */
+}
+
+/*
+ * Most commands manipulate target data (eg. memory and registers); each
+ * command returns a status byte that indicates success. Commands must
+ * transmit multibyte values in big-endian order, however response
+ * values are in little-endian order. Target endianness does not have an
+ * effect on this ordering.
+ */
+
+int esirisc_jtag_read_byte(struct esirisc_jtag *jtag_info, uint32_t address, uint8_t *data)
+{
+ struct scan_field out_fields[1];
+ uint8_t a[4];
+
+ out_fields[0].num_bits = 32;
+ out_fields[0].out_value = a;
+ h_u32_to_be(a, address);
+ out_fields[0].in_value = NULL;
+
+ struct scan_field in_fields[1];
+ uint8_t d[1];
+
+ in_fields[0].num_bits = 8;
+ in_fields[0].out_value = NULL;
+ in_fields[0].in_value = d;
+
+ int retval = esirisc_jtag_send_and_recv(jtag_info, DEBUG_READ_BYTE,
+ ARRAY_SIZE(out_fields), out_fields, ARRAY_SIZE(in_fields), in_fields);
+ if (retval != ERROR_OK)
+ return retval;
+
+ *data = *d;
+
+ return ERROR_OK;
+}
+
+int esirisc_jtag_read_hword(struct esirisc_jtag *jtag_info, uint32_t address, uint16_t *data)
+{
+ struct scan_field out_fields[1];
+ uint8_t a[4];
+
+ out_fields[0].num_bits = 32;
+ out_fields[0].out_value = a;
+ h_u32_to_be(a, address);
+ out_fields[0].in_value = NULL;
+
+ struct scan_field in_fields[1];
+ uint8_t d[2];
+
+ in_fields[0].num_bits = 16;
+ in_fields[0].out_value = NULL;
+ in_fields[0].in_value = d;
+
+ int retval = esirisc_jtag_send_and_recv(jtag_info, DEBUG_READ_HWORD,
+ ARRAY_SIZE(out_fields), out_fields, ARRAY_SIZE(in_fields), in_fields);
+ if (retval != ERROR_OK)
+ return retval;
+
+ *data = le_to_h_u16(d);
+
+ return ERROR_OK;
+}
+
+int esirisc_jtag_read_word(struct esirisc_jtag *jtag_info, uint32_t address, uint32_t *data)
+{
+ struct scan_field out_fields[1];
+ uint8_t a[4];
+
+ out_fields[0].num_bits = 32;
+ out_fields[0].out_value = a;
+ h_u32_to_be(a, address);
+ out_fields[0].in_value = NULL;
+
+ struct scan_field in_fields[1];
+ uint8_t d[4];
+
+ in_fields[0].num_bits = 32;
+ in_fields[0].out_value = NULL;
+ in_fields[0].in_value = d;
+
+ int retval = esirisc_jtag_send_and_recv(jtag_info, DEBUG_READ_WORD,
+ ARRAY_SIZE(out_fields), out_fields, ARRAY_SIZE(in_fields), in_fields);
+ if (retval != ERROR_OK)
+ return retval;
+
+ *data = le_to_h_u32(d);
+
+ return ERROR_OK;
+}
+
+int esirisc_jtag_write_byte(struct esirisc_jtag *jtag_info, uint32_t address, uint8_t data)
+{
+ struct scan_field out_fields[2];
+ uint8_t a[4];
+
+ out_fields[0].num_bits = 32;
+ out_fields[0].out_value = a;
+ h_u32_to_be(a, address);
+ out_fields[0].in_value = NULL;
+
+ out_fields[1].num_bits = 8;
+ out_fields[1].out_value = &data;
+ out_fields[1].in_value = NULL;
+
+ return esirisc_jtag_send_and_recv(jtag_info, DEBUG_WRITE_BYTE,
+ ARRAY_SIZE(out_fields), out_fields, 0, NULL);
+}
+
+int esirisc_jtag_write_hword(struct esirisc_jtag *jtag_info, uint32_t address, uint16_t data)
+{
+ struct scan_field out_fields[2];
+ uint8_t a[4], d[2];
+
+ out_fields[0].num_bits = 32;
+ out_fields[0].out_value = a;
+ h_u32_to_be(a, address);
+ out_fields[0].in_value = NULL;
+
+ out_fields[1].num_bits = 16;
+ out_fields[1].out_value = d;
+ h_u16_to_be(d, data);
+ out_fields[1].in_value = NULL;
+
+ return esirisc_jtag_send_and_recv(jtag_info, DEBUG_WRITE_HWORD,
+ ARRAY_SIZE(out_fields), out_fields, 0, NULL);
+}
+
+int esirisc_jtag_write_word(struct esirisc_jtag *jtag_info, uint32_t address, uint32_t data)
+{
+ struct scan_field out_fields[2];
+ uint8_t a[4], d[4];
+
+ out_fields[0].num_bits = 32;
+ out_fields[0].out_value = a;
+ h_u32_to_be(a, address);
+ out_fields[0].in_value = NULL;
+
+ out_fields[1].num_bits = 32;
+ out_fields[1].out_value = d;
+ h_u32_to_be(d, data);
+ out_fields[1].in_value = NULL;
+
+ return esirisc_jtag_send_and_recv(jtag_info, DEBUG_WRITE_WORD,
+ ARRAY_SIZE(out_fields), out_fields, 0, NULL);
+}
+
+int esirisc_jtag_read_reg(struct esirisc_jtag *jtag_info, uint8_t reg, uint32_t *data)
+{
+ struct scan_field out_fields[1];
+
+ out_fields[0].num_bits = 8;
+ out_fields[0].out_value = ®
+ out_fields[0].in_value = NULL;
+
+ struct scan_field in_fields[1];
+ uint8_t d[4];
+
+ in_fields[0].num_bits = 32;
+ in_fields[0].out_value = NULL;
+ in_fields[0].in_value = d;
+
+ int retval = esirisc_jtag_send_and_recv(jtag_info, DEBUG_READ_REG,
+ ARRAY_SIZE(out_fields), out_fields, ARRAY_SIZE(in_fields), in_fields);
+ if (retval != ERROR_OK)
+ return retval;
+
+ *data = le_to_h_u32(d);
+
+ return ERROR_OK;
+}
+
+int esirisc_jtag_write_reg(struct esirisc_jtag *jtag_info, uint8_t reg, uint32_t data)
+{
+ struct scan_field out_fields[2];
+ uint8_t d[4];
+
+ out_fields[0].num_bits = 8;
+ out_fields[0].out_value = ®
+ out_fields[0].in_value = NULL;
+
+ out_fields[1].num_bits = 32;
+ out_fields[1].out_value = d;
+ h_u32_to_be(d, data);
+ out_fields[1].in_value = NULL;
+
+ return esirisc_jtag_send_and_recv(jtag_info, DEBUG_WRITE_REG,
+ ARRAY_SIZE(out_fields), out_fields, 0, NULL);
+}
+
+int esirisc_jtag_read_csr(struct esirisc_jtag *jtag_info, uint8_t bank, uint8_t csr, uint32_t *data)
+{
+ struct scan_field out_fields[1];
+ uint8_t c[2];
+
+ out_fields[0].num_bits = 16;
+ out_fields[0].out_value = c;
+ h_u16_to_be(c, (csr << 5) | bank);
+ out_fields[0].in_value = NULL;
+
+ struct scan_field in_fields[1];
+ uint8_t d[4];
+
+ in_fields[0].num_bits = 32;
+ in_fields[0].out_value = NULL;
+ in_fields[0].in_value = d;
+
+ int retval = esirisc_jtag_send_and_recv(jtag_info, DEBUG_READ_CSR,
+ ARRAY_SIZE(out_fields), out_fields, ARRAY_SIZE(in_fields), in_fields);
+ if (retval != ERROR_OK)
+ return retval;
+
+ *data = le_to_h_u32(d);
+
+ return ERROR_OK;
+}
+
+int esirisc_jtag_write_csr(struct esirisc_jtag *jtag_info, uint8_t bank, uint8_t csr, uint32_t data)
+{
+ struct scan_field out_fields[2];
+ uint8_t c[2], d[4];
+
+ out_fields[0].num_bits = 16;
+ out_fields[0].out_value = c;
+ h_u16_to_be(c, (csr << 5) | bank);
+ out_fields[0].in_value = NULL;
+
+ out_fields[1].num_bits = 32;
+ out_fields[1].out_value = d;
+ h_u32_to_be(d, data);
+ out_fields[1].in_value = NULL;
+
+ return esirisc_jtag_send_and_recv(jtag_info, DEBUG_WRITE_CSR,
+ ARRAY_SIZE(out_fields), out_fields, 0, NULL);
+}
+
+/*
+ * Control commands affect CPU operation; these commands send no data
+ * and return a status byte.
+ */
+
+static inline int esirisc_jtag_send_ctrl(struct esirisc_jtag *jtag_info, uint8_t command)
+{
+ return esirisc_jtag_send_and_recv(jtag_info, command, 0, NULL, 0, NULL);
+}
+
+int esirisc_jtag_enable_debug(struct esirisc_jtag *jtag_info)
+{
+ return esirisc_jtag_send_ctrl(jtag_info, DEBUG_ENABLE_DEBUG);
+}
+
+int esirisc_jtag_disable_debug(struct esirisc_jtag *jtag_info)
+{
+ return esirisc_jtag_send_ctrl(jtag_info, DEBUG_DISABLE_DEBUG);
+}
+
+int esirisc_jtag_assert_reset(struct esirisc_jtag *jtag_info)
+{
+ return esirisc_jtag_send_ctrl(jtag_info, DEBUG_ASSERT_RESET);
+}
+
+int esirisc_jtag_deassert_reset(struct esirisc_jtag *jtag_info)
+{
+ return esirisc_jtag_send_ctrl(jtag_info, DEBUG_DEASSERT_RESET);
+}
+
+int esirisc_jtag_break(struct esirisc_jtag *jtag_info)
+{
+ return esirisc_jtag_send_ctrl(jtag_info, DEBUG_BREAK);
+}
+
+int esirisc_jtag_continue(struct esirisc_jtag *jtag_info)
+{
+ return esirisc_jtag_send_ctrl(jtag_info, DEBUG_CONTINUE);
+}
+
+int esirisc_jtag_flush_caches(struct esirisc_jtag *jtag_info)
+{
+ return esirisc_jtag_send_ctrl(jtag_info, DEBUG_FLUSH_CACHES);
+}
--- /dev/null
+/***************************************************************************
+ * 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 */
--- /dev/null
+/***************************************************************************
+ * 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_REGS_H
+#define OPENOCD_TARGET_ESIRISC_REGS_H
+
+enum esirisc_reg_num {
+ ESIRISC_SP,
+ ESIRISC_RA,
+ ESIRISC_R2,
+ ESIRISC_R3,
+ ESIRISC_R4,
+ ESIRISC_R5,
+ ESIRISC_R6,
+ ESIRISC_R7,
+ ESIRISC_R8,
+ ESIRISC_R9,
+ ESIRISC_R10,
+ ESIRISC_R11,
+ ESIRISC_R12,
+ ESIRISC_R13,
+ ESIRISC_R14,
+ ESIRISC_R15,
+ ESIRISC_R16,
+ ESIRISC_R17,
+ ESIRISC_R18,
+ ESIRISC_R19,
+ ESIRISC_R20,
+ ESIRISC_R21,
+ ESIRISC_R22,
+ ESIRISC_R23,
+ ESIRISC_R24,
+ ESIRISC_R25,
+ ESIRISC_R26,
+ ESIRISC_R27,
+ ESIRISC_R28,
+ ESIRISC_R29,
+ ESIRISC_R30,
+ ESIRISC_R31,
+
+ ESIRISC_V0,
+ ESIRISC_V1,
+ ESIRISC_V2,
+ ESIRISC_V3,
+ ESIRISC_V4,
+ ESIRISC_V5,
+ ESIRISC_V6,
+ ESIRISC_V7,
+ ESIRISC_V8,
+ ESIRISC_V9,
+ ESIRISC_V10,
+ ESIRISC_V11,
+ ESIRISC_V12,
+ ESIRISC_V13,
+ ESIRISC_V14,
+ ESIRISC_V15,
+ ESIRISC_V16,
+ ESIRISC_V17,
+ ESIRISC_V18,
+ ESIRISC_V19,
+ ESIRISC_V20,
+ ESIRISC_V21,
+ ESIRISC_V22,
+ ESIRISC_V23,
+ ESIRISC_V24,
+ ESIRISC_V25,
+ ESIRISC_V26,
+ ESIRISC_V27,
+ ESIRISC_V28,
+ ESIRISC_V29,
+ ESIRISC_V30,
+ ESIRISC_V31,
+
+ ESIRISC_A0,
+ ESIRISC_A1,
+ ESIRISC_A2,
+ ESIRISC_A3,
+ ESIRISC_A4,
+ ESIRISC_A5,
+ ESIRISC_A6,
+ ESIRISC_A7,
+
+ ESIRISC_PC,
+ ESIRISC_CAS,
+ ESIRISC_TC,
+ ESIRISC_ETA,
+ ESIRISC_ETC,
+ ESIRISC_EPC,
+ ESIRISC_ECAS,
+ ESIRISC_EID,
+ ESIRISC_ED,
+ ESIRISC_IP,
+ ESIRISC_IM,
+ ESIRISC_IS,
+ ESIRISC_IT,
+
+ ESIRISC_NUM_REGS,
+};
+
+/* CSR Banks */
+#define CSR_THREAD 0x00
+#define CSR_INTERRUPT 0x01
+#define CSR_DEBUG 0x04
+#define CSR_CONFIG 0x05
+#define CSR_TRACE 0x09
+
+/* Thread CSRs */
+#define CSR_THREAD_TC 0x00 /* Thread Control */
+#define CSR_THREAD_PC 0x01 /* Program Counter */
+#define CSR_THREAD_CAS 0x02 /* Comparison & Arithmetic Status */
+#define CSR_THREAD_AC 0x03 /* Arithmetic Control */
+#define CSR_THREAD_LF 0x04 /* Locked Flag */
+#define CSR_THREAD_LA 0x05 /* Locked Address */
+#define CSR_THREAD_ETA 0x07 /* Exception Table Address */
+#define CSR_THREAD_ETC 0x08 /* Exception TC */
+#define CSR_THREAD_EPC 0x09 /* Exception PC */
+#define CSR_THREAD_ECAS 0x0a /* Exception CAS */
+#define CSR_THREAD_EID 0x0b /* Exception ID */
+#define CSR_THREAD_ED 0x0c /* Exception Data */
+
+/* Interrupt CSRs */
+#define CSR_INTERRUPT_IP 0x00 /* Interrupt Pending */
+#define CSR_INTERRUPT_IA 0x01 /* Interrupt Acknowledge */
+#define CSR_INTERRUPT_IM 0x02 /* Interrupt Mask */
+#define CSR_INTERRUPT_IS 0x03 /* Interrupt Sense */
+#define CSR_INTERRUPT_IT 0x04 /* Interrupt Trigger */
+
+/* Debug CSRs */
+#define CSR_DEBUG_DC 0x00 /* Debug Control */
+#define CSR_DEBUG_IBC 0x01 /* Instruction Breakpoint Control */
+#define CSR_DEBUG_DBC 0x02 /* Data Breakpoint Control */
+#define CSR_DEBUG_HWDC 0x03 /* Hardware Debug Control */
+#define CSR_DEBUG_DBS 0x04 /* Data Breakpoint Size */
+#define CSR_DEBUG_DBR 0x05 /* Data Breakpoint Range */
+#define CSR_DEBUG_IBAn 0x08 /* Instruction Breakpoint Address [0..7] */
+#define CSR_DEBUG_DBAn 0x10 /* Data Breakpoint Address [0..7] */
+
+/* Configuration CSRs */
+#define CSR_CONFIG_ARCH0 0x00 /* Architectural Configuration 0 */
+#define CSR_CONFIG_ARCH1 0x01 /* Architectural Configuration 1 */
+#define CSR_CONFIG_ARCH2 0x02 /* Architectural Configuration 2 */
+#define CSR_CONFIG_ARCH3 0x03 /* Architectural Configuration 3 */
+#define CSR_CONFIG_MEM 0x04 /* Memory Configuration */
+#define CSR_CONFIG_IC 0x05 /* Instruction Cache Configuration */
+#define CSR_CONFIG_DC 0x06 /* Data Cache Configuration */
+#define CSR_CONFIG_INT 0x07 /* Interrupt Configuration */
+#define CSR_CONFIG_ISAn 0x08 /* Instruction Set Configuration [0..6] */
+#define CSR_CONFIG_DBG 0x0f /* Debug Configuration */
+#define CSR_CONFIG_MID 0x10 /* Manufacturer ID */
+#define CSR_CONFIG_REV 0x11 /* Revision Number */
+#define CSR_CONFIG_MPID 0x12 /* Mulitprocessor ID */
+#define CSR_CONFIG_FREQn 0x13 /* Frequency [0..2] */
+#define CSR_CONFIG_TRACE 0x16 /* Trace Configuration */
+
+/* Trace CSRs */
+#define CSR_TRACE_CONTROL 0x00
+#define CSR_TRACE_STATUS 0x01
+#define CSR_TRACE_BUFFER_START 0x02
+#define CSR_TRACE_BUFFER_END 0x03
+#define CSR_TRACE_BUFFER_CUR 0x04
+#define CSR_TRACE_TRIGGER 0x05
+#define CSR_TRACE_START_DATA 0x06
+#define CSR_TRACE_START_MASK 0x07
+#define CSR_TRACE_STOP_DATA 0x08
+#define CSR_TRACE_STOP_MASK 0x09
+#define CSR_TRACE_DELAY 0x0a
+
+#endif /* OPENOCD_TARGET_ESIRISC_REGS_H */
extern struct target_type stm8_target;
extern struct target_type riscv_target;
extern struct target_type mem_ap_target;
+extern struct target_type esirisc_target;
static struct target_type *target_types[] = {
&arm7tdmi_target,
&quark_d20xx_target,
&stm8_target,
&riscv_target,
+ &mem_ap_target,
+ &esirisc_target,
#if BUILD_TARGET64
&aarch64_target,
#endif
- &mem_ap_target,
NULL,
};
uint64_t param_4;
};
+/** Returns a description of the endianness for the specified target. */
+static inline const char *target_endianness(struct target *target)
+{
+ return (target->endianness == TARGET_ENDIAN_UNKNOWN) ? "unknown" :
+ (target->endianness == TARGET_BIG_ENDIAN) ? "big endian" : "little endian";
+}
+
/** Returns the instance-specific name of the specified target. */
static inline const char *target_name(struct target *target)
{
--- /dev/null
+#
+# EnSilica eSi-32xx SoC (eSi-RISC Family)
+# http://www.ensilica.com/risc-ip/
+#
+
+if { [info exists CHIPNAME] } {
+ set _CHIPNAME $CHIPNAME
+} else {
+ set _CHIPNAME esi32xx
+}
+
+if { [info exists CPUTAPID] } {
+ set _CPUTAPID $CPUTAPID
+} else {
+ set _CPUTAPID 0x11234001
+}
+
+jtag newtap $_CHIPNAME cpu -irlen 4 -expected-id $_CPUTAPID
+
+set _TARGETNAME $_CHIPNAME.cpu
+target create $_TARGETNAME esirisc -chain-position $_CHIPNAME.cpu
+
+# Targets with the UNIFIED_ADDRESS_SPACE option disabled should set
+# CACHEARCH to 'harvard'. By default, 'von_neumann' is assumed.
+if { [info exists CACHEARCH] } {
+ $_TARGETNAME esirisc cache_arch $CACHEARCH
+}
+
+adapter_khz 2000
+
+reset_config none
+
+# The default linker scripts provided by the eSi-RISC toolchain do not
+# specify attributes on memory regions, which results in incorrect
+# application of software breakpoints by GDB.
+gdb_breakpoint_override hard
projects / openocd / commitdiff