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