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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (C) 2015 by Esben Haabendal <eha@deif.com>
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "target.h"
#include "target_type.h"
#include <jtag/jtag.h>
struct ls1_sap {
struct jtag_tap *tap;
};
static int ls1_sap_target_create(struct target *target, Jim_Interp *interp)
{
struct ls1_sap *ls1_sap = calloc(1, sizeof(struct ls1_sap));
ls1_sap->tap = target->tap;
target->arch_info = ls1_sap;
return ERROR_OK;
}
static int ls1_sap_init_target(struct command_context *cmd_ctx, struct target *target)
{
LOG_DEBUG("%s", __func__);
return ERROR_OK;
}
static int ls1_sap_arch_state(struct target *target)
{
LOG_DEBUG("%s", __func__);
return ERROR_OK;
}
static int ls1_sap_poll(struct target *target)
{
if ((target->state == TARGET_UNKNOWN) ||
(target->state == TARGET_RUNNING) ||
(target->state == TARGET_DEBUG_RUNNING))
target->state = TARGET_HALTED;
return ERROR_OK;
}
static int ls1_sap_halt(struct target *target)
{
LOG_DEBUG("%s", __func__);
return ERROR_OK;
}
static int ls1_sap_resume(struct target *target, int current, target_addr_t address,
int handle_breakpoints, int debug_execution)
{
LOG_DEBUG("%s", __func__);
return ERROR_OK;
}
static int ls1_sap_step(struct target *target, int current, target_addr_t address,
int handle_breakpoints)
{
LOG_DEBUG("%s", __func__);
return ERROR_OK;
}
static int ls1_sap_assert_reset(struct target *target)
{
target->state = TARGET_RESET;
LOG_DEBUG("%s", __func__);
return ERROR_OK;
}
static int ls1_sap_deassert_reset(struct target *target)
{
target->state = TARGET_RUNNING;
LOG_DEBUG("%s", __func__);
return ERROR_OK;
}
static void ls1_sap_set_instr(struct jtag_tap *tap, uint32_t new_instr)
{
struct scan_field field;
if (buf_get_u32(tap->cur_instr, 0, tap->ir_length) == new_instr)
return;
field.num_bits = tap->ir_length;
uint8_t *t = calloc(DIV_ROUND_UP(field.num_bits, 8), 1);
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);
free(t);
}
static void ls1_sap_set_addr_high(struct jtag_tap *tap, uint16_t addr_high)
{
struct scan_field field;
uint8_t buf[2] = { 0 };
ls1_sap_set_instr(tap, 0x21);
field.num_bits = 16;
field.out_value = buf;
buf_set_u32(buf, 0, 16, addr_high);
field.in_value = NULL;
field.check_value = NULL;
field.check_mask = NULL;
jtag_add_dr_scan(tap, 1, &field, TAP_IDLE);
}
static void ls1_sap_memory_cmd(struct jtag_tap *tap, uint32_t address,
int32_t size, bool rnw)
{
struct scan_field field;
uint8_t cmd[8] = { 0 };
ls1_sap_set_instr(tap, 0x24);
field.num_bits = 64;
field.out_value = cmd;
buf_set_u64(cmd, 0, 9, 0);
buf_set_u64(cmd, 9, 3, size);
buf_set_u64(cmd, 12, 1, rnw);
buf_set_u64(cmd, 13, 3, 0);
buf_set_u64(cmd, 16, 32, address);
buf_set_u64(cmd, 48, 16, 0);
field.in_value = NULL;
field.check_value = NULL;
field.check_mask = NULL;
jtag_add_dr_scan(tap, 1, &field, TAP_IDLE);
}
static void ls1_sap_memory_read(struct jtag_tap *tap, uint32_t size,
uint8_t *value)
{
struct scan_field field;
ls1_sap_set_instr(tap, 0x25);
field.num_bits = 8 * size;
field.out_value = NULL;
field.in_value = value;
field.check_value = NULL;
field.check_mask = NULL;
jtag_add_dr_scan(tap, 1, &field, TAP_IDLE);
}
static void ls1_sap_memory_write(struct jtag_tap *tap, uint32_t size,
const uint8_t *value)
{
struct scan_field field;
ls1_sap_set_instr(tap, 0x25);
field.num_bits = 8 * size;
field.out_value = value;
field.in_value = NULL;
field.check_value = NULL;
field.check_mask = NULL;
jtag_add_dr_scan(tap, 1, &field, TAP_IDLE);
}
static int ls1_sap_read_memory(struct target *target, target_addr_t address,
uint32_t size, uint32_t count, uint8_t *buffer)
{
LOG_DEBUG("Reading memory at physical address 0x%" TARGET_PRIxADDR
"; size %" PRIu32 "; count %" PRIu32, address, size, count);
if (count == 0 || !buffer)
return ERROR_COMMAND_SYNTAX_ERROR;
ls1_sap_set_addr_high(target->tap, 0);
while (count--) {
ls1_sap_memory_cmd(target->tap, address, size, true);
ls1_sap_memory_read(target->tap, size, buffer);
address += size;
buffer += size;
}
return jtag_execute_queue();
}
static int ls1_sap_write_memory(struct target *target, target_addr_t address,
uint32_t size, uint32_t count,
const uint8_t *buffer)
{
LOG_DEBUG("Writing memory at physical address 0x%" TARGET_PRIxADDR
"; size %" PRIu32 "; count %" PRIu32, address, size, count);
if (count == 0 || !buffer)
return ERROR_COMMAND_SYNTAX_ERROR;
ls1_sap_set_addr_high(target->tap, 0);
while (count--) {
ls1_sap_memory_cmd(target->tap, address, size, false);
ls1_sap_memory_write(target->tap, size, buffer);
address += size;
buffer += size;
}
return jtag_execute_queue();
}
struct target_type ls1_sap_target = {
.name = "ls1_sap",
.target_create = ls1_sap_target_create,
.init_target = ls1_sap_init_target,
.poll = ls1_sap_poll,
.arch_state = ls1_sap_arch_state,
.halt = ls1_sap_halt,
.resume = ls1_sap_resume,
.step = ls1_sap_step,
.assert_reset = ls1_sap_assert_reset,
.deassert_reset = ls1_sap_deassert_reset,
.read_memory = ls1_sap_read_memory,
.write_memory = ls1_sap_write_memory,
};
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