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// SPDX-License-Identifier: GPL-2.0-or-later
/***************************************************************************
* Copyright (C) 2010 by Oleksandr Tymoshenko <gonzo@bluezbox.com> *
***************************************************************************/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "target.h"
#include "jtag/jtag.h"
#include "avr32_jtag.h"
#include "avr32_regs.h"
static int avr32_jtag_read_reg(struct avr32_jtag *jtag_info, int reg,
uint32_t *val)
{
int retval;
uint32_t dcsr;
retval = avr32_jtag_exec(jtag_info, MTDR(AVR32_OCDREG_DCCPU, reg));
if (retval != ERROR_OK)
return retval;
do {
retval = avr32_jtag_nexus_read(jtag_info,
AVR32_OCDREG_DCSR, &dcsr);
if (retval != ERROR_OK)
return retval;
} while (!(dcsr & OCDREG_DCSR_CPUD));
retval = avr32_jtag_nexus_read(jtag_info,
AVR32_OCDREG_DCCPU, val);
return retval;
}
static int avr32_jtag_write_reg(struct avr32_jtag *jtag_info, int reg,
uint32_t val)
{
int retval;
uint32_t dcsr;
/* Restore Status reg */
retval = avr32_jtag_nexus_write(jtag_info,
AVR32_OCDREG_DCEMU, val);
if (retval != ERROR_OK)
return retval;
retval = avr32_jtag_exec(jtag_info, MFDR(reg, AVR32_OCDREG_DCEMU));
if (retval != ERROR_OK)
return retval;
do {
retval = avr32_jtag_nexus_read(jtag_info,
AVR32_OCDREG_DCSR, &dcsr);
} while (!(dcsr & OCDREG_DCSR_EMUD) && (retval == ERROR_OK));
return retval;
}
int avr32_jtag_read_regs(struct avr32_jtag *jtag_info, uint32_t *regs)
{
int i, retval;
/* read core registers */
for (i = 0; i < AVR32NUMCOREREGS - 1; i++)
avr32_jtag_read_reg(jtag_info, i, regs + i);
/* read status register */
retval = avr32_jtag_exec(jtag_info, MFSR(0, 0));
if (retval != ERROR_OK)
return retval;
retval = avr32_jtag_read_reg(jtag_info, 0, regs + AVR32_REG_SR);
return retval;
}
int avr32_jtag_write_regs(struct avr32_jtag *jtag_info, uint32_t *regs)
{
int i, retval;
retval = avr32_jtag_write_reg(jtag_info, 0, regs[AVR32_REG_SR]);
if (retval != ERROR_OK)
return retval;
/* Restore Status reg */
retval = avr32_jtag_exec(jtag_info, MTSR(0, 0));
if (retval != ERROR_OK)
return retval;
/*
* And now the rest of registers
*/
for (i = 0; i < AVR32NUMCOREREGS - 1; i++)
avr32_jtag_write_reg(jtag_info, i, regs[i]);
return ERROR_OK;
}