diff options
Diffstat (limited to 'src/target/avr32_regs.c')
| -rw-r--r-- | src/target/avr32_regs.c | 112 |
1 files changed, 112 insertions, 0 deletions
diff --git a/src/target/avr32_regs.c b/src/target/avr32_regs.c new file mode 100644 index 00000000..eb283fc3 --- /dev/null +++ b/src/target/avr32_regs.c @@ -0,0 +1,112 @@ +/*************************************************************************** + * Copyright (C) 2010 by Oleksandr Tymoshenko <gonzo@bluezbox.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, write to the * + * Free Software Foundation, Inc., * + * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. * + ***************************************************************************/ +#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]); + /* 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; +} |