Commit c3d51bf0 authored by Oleksandr Tymoshenko's avatar Oleksandr Tymoshenko Committed by Øyvind Harboe
Browse files

avr32: work-in-progress

committed so as to ease cooperation and to let it be improved
over time.

So far it supports:
- halt/resume
- registers inspection
- memory inspection/modification

I'm still getting up to speed with OpenOCD internals and AVR32 so code is a little
bit messy and I'd appreciate any feedback.
parent bb88f3f4
......@@ -32,6 +32,7 @@ libtarget_la_SOURCES = \
$(ARMV6_SRC) \
$(ARMV7_SRC) \
$(ARM_MISC_SRC) \
$(AVR32_SRC) \
$(MIPS32_SRC) \
avrt.c \
dsp563xx.c \
......@@ -92,6 +93,12 @@ ARM_DEBUG_SRC = \
$(OOCD_TRACE_FILES) \
etm_dummy.c
AVR32_SRC = \
avr32_ap7k.c \
avr32_jtag.c \
avr32_mem.c \
avr32_regs.c
MIPS32_SRC = \
mips32.c \
mips_m4k.c \
......
/***************************************************************************
* Copyright (C) 2010 by Oleksandr Tymoshenko <gonzo@bluezbox.com> *
* Based on mips_m4k code: *
* Copyright (C) 2008 by Spencer Oliver <spen@spen-soft.co.uk> *
* Copyright (C) 2008 by David T.L. Wong *
* *
* 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 "jtag/jtag.h"
#include "register.h"
#include "algorithm.h"
#include "target.h"
#include "breakpoints.h"
#include "target_type.h"
#include "avr32_jtag.h"
#include "avr32_mem.h"
#include "avr32_regs.h"
#include "avr32_ap7k.h"
static char* avr32_core_reg_list[] =
{
"r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", "r8",
"r9", "r10", "r11", "r12", "sp", "lr", "pc", "sr"
};
static struct avr32_core_reg
avr32_core_reg_list_arch_info[AVR32NUMCOREREGS] =
{
{0, NULL, NULL},
{1, NULL, NULL},
{2, NULL, NULL},
{3, NULL, NULL},
{4, NULL, NULL},
{5, NULL, NULL},
{6, NULL, NULL},
{7, NULL, NULL},
{8, NULL, NULL},
{9, NULL, NULL},
{10, NULL, NULL},
{11, NULL, NULL},
{12, NULL, NULL},
{13, NULL, NULL},
{14, NULL, NULL},
{15, NULL, NULL},
{16, NULL, NULL},
};
static int avr32_read_core_reg(struct target *target, int num);
static int avr32_write_core_reg(struct target *target, int num);
int avr32_ap7k_save_context(struct target *target)
{
int retval, i;
struct avr32_ap7k_common *ap7k = target_to_ap7k(target);
retval = avr32_jtag_read_regs(&ap7k->jtag, ap7k->core_regs);
if (retval != ERROR_OK)
return retval;
for (i = 0; i < AVR32NUMCOREREGS; i++)
{
if (!ap7k->core_cache->reg_list[i].valid)
{
avr32_read_core_reg(target, i);
}
}
return ERROR_OK;
}
int avr32_ap7k_restore_context(struct target *target)
{
int i;
/* get pointers to arch-specific information */
struct avr32_ap7k_common *ap7k = target_to_ap7k(target);
for (i = 0; i < AVR32NUMCOREREGS; i++)
{
if (ap7k->core_cache->reg_list[i].dirty)
{
avr32_write_core_reg(target, i);
}
}
/* write core regs */
avr32_jtag_write_regs(&ap7k->jtag, ap7k->core_regs);
return ERROR_OK;
}
static int avr32_read_core_reg(struct target *target, int num)
{
uint32_t reg_value;
struct avr32_core_reg *mips_core_reg;
/* get pointers to arch-specific information */
struct avr32_ap7k_common *ap7k = target_to_ap7k(target);
if ((num < 0) || (num >= AVR32NUMCOREREGS))
return ERROR_INVALID_ARGUMENTS;
mips_core_reg = ap7k->core_cache->reg_list[num].arch_info;
reg_value = ap7k->core_regs[num];
buf_set_u32(ap7k->core_cache->reg_list[num].value, 0, 32, reg_value);
ap7k->core_cache->reg_list[num].valid = 1;
ap7k->core_cache->reg_list[num].dirty = 0;
return ERROR_OK;
}
static int avr32_write_core_reg(struct target *target, int num)
{
uint32_t reg_value;
struct avr32_core_reg *mips_core_reg;
/* get pointers to arch-specific information */
struct avr32_ap7k_common *ap7k = target_to_ap7k(target);
if ((num < 0) || (num >= AVR32NUMCOREREGS))
return ERROR_INVALID_ARGUMENTS;
reg_value = buf_get_u32(ap7k->core_cache->reg_list[num].value, 0, 32);
mips_core_reg = ap7k->core_cache->reg_list[num].arch_info;
ap7k->core_regs[num] = reg_value;
LOG_DEBUG("write core reg %i value 0x%" PRIx32 "", num , reg_value);
ap7k->core_cache->reg_list[num].valid = 1;
ap7k->core_cache->reg_list[num].dirty = 0;
return ERROR_OK;
}
static int avr32_get_core_reg(struct reg *reg)
{
int retval;
struct avr32_core_reg *avr32_reg = reg->arch_info;
struct target *target = avr32_reg->target;
if (target->state != TARGET_HALTED)
{
return ERROR_TARGET_NOT_HALTED;
}
retval = avr32_read_core_reg(target, avr32_reg->num);
return retval;
}
static int avr32_set_core_reg(struct reg *reg, uint8_t *buf)
{
struct avr32_core_reg *avr32_reg = reg->arch_info;
struct target *target = avr32_reg->target;
uint32_t value = buf_get_u32(buf, 0, 32);
if (target->state != TARGET_HALTED)
{
return ERROR_TARGET_NOT_HALTED;
}
buf_set_u32(reg->value, 0, 32, value);
reg->dirty = 1;
reg->valid = 1;
return ERROR_OK;
}
static const struct reg_arch_type avr32_reg_type = {
.get = avr32_get_core_reg,
.set = avr32_set_core_reg,
};
static struct reg_cache *avr32_build_reg_cache(struct target *target)
{
int num_regs = AVR32NUMCOREREGS;
struct avr32_ap7k_common *ap7k = target_to_ap7k(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 = malloc(sizeof(struct reg) * num_regs);
struct avr32_core_reg *arch_info =
malloc(sizeof(struct avr32_core_reg) * num_regs);
int i;
/* Build the process context cache */
cache->name = "avr32 registers";
cache->next = NULL;
cache->reg_list = reg_list;
cache->num_regs = num_regs;
(*cache_p) = cache;
ap7k->core_cache = cache;
for (i = 0; i < num_regs; i++)
{
arch_info[i] = avr32_core_reg_list_arch_info[i];
arch_info[i].target = target;
arch_info[i].avr32_common = ap7k;
reg_list[i].name = avr32_core_reg_list[i];
reg_list[i].size = 32;
reg_list[i].value = calloc(1, 4);
reg_list[i].dirty = 0;
reg_list[i].valid = 0;
reg_list[i].type = &avr32_reg_type;
reg_list[i].arch_info = &arch_info[i];
}
return cache;
}
static int avr32_ap7k_debug_entry(struct target *target)
{
uint32_t dpc, dinst;
int retval;
struct avr32_ap7k_common *ap7k = target_to_ap7k(target);
retval = avr32_jtag_nexus_read(&ap7k->jtag, AVR32_OCDREG_DPC, &dpc);
if (retval != ERROR_OK)
return retval;
retval = avr32_jtag_nexus_read(&ap7k->jtag, AVR32_OCDREG_DINST, &dinst);
if (retval != ERROR_OK)
return retval;
ap7k->jtag.dpc = dpc;
avr32_ap7k_save_context(target);
return ERROR_OK;
}
static int avr32_ap7k_poll(struct target *target)
{
uint32_t ds;
int retval;
struct avr32_ap7k_common *ap7k = target_to_ap7k(target);
retval = avr32_jtag_nexus_read(&ap7k->jtag, AVR32_OCDREG_DS, &ds);
if (retval != ERROR_OK)
return retval;
/* check for processor halted */
if (ds & OCDREG_DS_DBA)
{
if ((target->state == TARGET_RUNNING) || (target->state == TARGET_RESET))
{
target->state = TARGET_HALTED;
if ((retval = avr32_ap7k_debug_entry(target)) != ERROR_OK)
return retval;
target_call_event_callbacks(target, TARGET_EVENT_HALTED);
}
else if (target->state == TARGET_DEBUG_RUNNING)
{
target->state = TARGET_HALTED;
if ((retval = avr32_ap7k_debug_entry(target)) != ERROR_OK)
return retval;
target_call_event_callbacks(target, TARGET_EVENT_DEBUG_HALTED);
}
}
else
{
target->state = TARGET_RUNNING;
}
return ERROR_OK;
}
static int avr32_ap7k_halt(struct target *target)
{
struct avr32_ap7k_common *ap7k = target_to_ap7k(target);
LOG_DEBUG("target->state: %s",
target_state_name(target));
if (target->state == TARGET_HALTED)
{
LOG_DEBUG("target was already halted");
return ERROR_OK;
}
if (target->state == TARGET_UNKNOWN)
{
LOG_WARNING("target was in unknown state when halt was requested");
}
if (target->state == TARGET_RESET)
{
if ((jtag_get_reset_config() & RESET_SRST_PULLS_TRST) && jtag_get_srst())
{
LOG_ERROR("can't request a halt while in reset if nSRST pulls nTRST");
return ERROR_TARGET_FAILURE;
}
else
{
target->debug_reason = DBG_REASON_DBGRQ;
return ERROR_OK;
}
}
avr32_ocd_setbits(&ap7k->jtag, AVR32_OCDREG_DC, OCDREG_DC_DBR);
target->debug_reason = DBG_REASON_DBGRQ;
return ERROR_OK;
}
static int avr32_ap7k_assert_reset(struct target *target)
{
LOG_ERROR("%s: implement me", __func__);
return ERROR_OK;
}
static int avr32_ap7k_deassert_reset(struct target *target)
{
LOG_ERROR("%s: implement me", __func__);
return ERROR_OK;
}
static int avr32_ap7k_soft_reset_halt(struct target *target)
{
LOG_ERROR("%s: implement me", __func__);
return ERROR_OK;
}
static int avr32_ap7k_resume(struct target *target, int current,
uint32_t address, int handle_breakpoints, int debug_execution)
{
struct avr32_ap7k_common *ap7k = target_to_ap7k(target);
struct breakpoint *breakpoint = NULL;
uint32_t resume_pc;
int retval;
if (target->state != TARGET_HALTED)
{
LOG_WARNING("target not halted");
return ERROR_TARGET_NOT_HALTED;
}
if (!debug_execution)
{
target_free_all_working_areas(target);
/*
avr32_ap7k_enable_breakpoints(target);
avr32_ap7k_enable_watchpoints(target);
*/
}
/* current = 1: continue on current pc, otherwise continue at <address> */
if (!current)
{
#if 0
if (retval != ERROR_OK)
return retval;
#endif
}
resume_pc =
buf_get_u32(ap7k->core_cache->reg_list[AVR32_REG_PC].value, 0, 32);
avr32_ap7k_restore_context(target);
/* the front-end may request us not to handle breakpoints */
if (handle_breakpoints)
{
/* Single step past breakpoint at current address */
if ((breakpoint = breakpoint_find(target, resume_pc)))
{
LOG_DEBUG("unset breakpoint at 0x%8.8" PRIx32 "", breakpoint->address);
#if 0
avr32_ap7k_unset_breakpoint(target, breakpoint);
avr32_ap7k_single_step_core(target);
avr32_ap7k_set_breakpoint(target, breakpoint);
#endif
}
}
#if 0
/* enable interrupts if we are running */
avr32_ap7k_enable_interrupts(target, !debug_execution);
/* exit debug mode */
mips_ejtag_exit_debug(ejtag_info);
#endif
retval = avr32_ocd_clearbits(&ap7k->jtag, AVR32_OCDREG_DC,
OCDREG_DC_DBR);
if (retval != ERROR_OK)
return retval;
retval = avr32_jtag_exec(&ap7k->jtag, RETD);
if (retval != ERROR_OK)
return retval;
target->debug_reason = DBG_REASON_NOTHALTED;
/* registers are now invalid */
register_cache_invalidate(ap7k->core_cache);
if (!debug_execution)
{
target->state = TARGET_RUNNING;
target_call_event_callbacks(target, TARGET_EVENT_RESUMED);
LOG_DEBUG("target resumed at 0x%" PRIx32 "", resume_pc);
}
else
{
target->state = TARGET_DEBUG_RUNNING;
target_call_event_callbacks(target, TARGET_EVENT_DEBUG_RESUMED);
LOG_DEBUG("target debug resumed at 0x%" PRIx32 "", resume_pc);
}
return ERROR_OK;
}
static int avr32_ap7k_step(struct target *target, int current,
uint32_t address, int handle_breakpoints)
{
LOG_ERROR("%s: implement me", __func__);
return ERROR_OK;
}
static int avr32_ap7k_add_breakpoint(struct target *target, struct breakpoint *breakpoint)
{
LOG_ERROR("%s: implement me", __func__);
return ERROR_OK;
}
static int avr32_ap7k_remove_breakpoint(struct target *target,
struct breakpoint *breakpoint)
{
LOG_ERROR("%s: implement me", __func__);
return ERROR_OK;
}
static int avr32_ap7k_add_watchpoint(struct target *target, struct watchpoint *watchpoint)
{
LOG_ERROR("%s: implement me", __func__);
return ERROR_OK;
}
static int avr32_ap7k_remove_watchpoint(struct target *target,
struct watchpoint *watchpoint)
{
LOG_ERROR("%s: implement me", __func__);
return ERROR_OK;
}
static int avr32_ap7k_read_memory(struct target *target, uint32_t address,
uint32_t size, uint32_t count, uint8_t *buffer)
{
struct avr32_ap7k_common *ap7k = target_to_ap7k(target);
LOG_DEBUG("address: 0x%8.8" PRIx32 ", size: 0x%8.8" PRIx32 ", count: 0x%8.8" PRIx32 "", address, size, count);
if (target->state != TARGET_HALTED)
{
LOG_WARNING("target not halted");
return ERROR_TARGET_NOT_HALTED;
}
/* sanitize arguments */
if (((size != 4) && (size != 2) && (size != 1)) || (count == 0) || !(buffer))
return ERROR_INVALID_ARGUMENTS;
if (((size == 4) && (address & 0x3u)) || ((size == 2) && (address & 0x1u)))
return ERROR_TARGET_UNALIGNED_ACCESS;
switch (size)
{
case 4:
return avr32_jtag_read_memory32(&ap7k->jtag, address, count, (uint32_t*)buffer);
break;
case 2:
return avr32_jtag_read_memory16(&ap7k->jtag, address, count, (uint16_t*)buffer);
break;
case 1:
return avr32_jtag_read_memory8(&ap7k->jtag, address, count, buffer);
break;
default:
break;
}
return ERROR_OK;
}
static int avr32_ap7k_write_memory(struct target *target, uint32_t address,
uint32_t size, uint32_t count, uint8_t *buffer)
{
struct avr32_ap7k_common *ap7k = target_to_ap7k(target);
LOG_DEBUG("address: 0x%8.8" PRIx32 ", size: 0x%8.8" PRIx32 ", count: 0x%8.8" PRIx32 "", address, size, count);
if (target->state != TARGET_HALTED)
{
LOG_WARNING("target not halted");
return ERROR_TARGET_NOT_HALTED;
}
/* sanitize arguments */
if (((size != 4) && (size != 2) && (size != 1)) || (count == 0) || !(buffer))
return ERROR_INVALID_ARGUMENTS;
if (((size == 4) && (address & 0x3u)) || ((size == 2) && (address & 0x1u)))
return ERROR_TARGET_UNALIGNED_ACCESS;
switch (size)
{
case 4:
return avr32_jtag_write_memory32(&ap7k->jtag, address, count, (uint32_t*)buffer);
break;
case 2:
return avr32_jtag_write_memory16(&ap7k->jtag, address, count, (uint16_t*)buffer);
break;
case 1:
return avr32_jtag_write_memory8(&ap7k->jtag, address, count, buffer);
break;
default:
break;
}
return ERROR_OK;
}
static int avr32_ap7k_init_target(struct command_context *cmd_ctx,
struct target *target)
{
struct avr32_ap7k_common *ap7k = target_to_ap7k(target);
ap7k->jtag.tap = target->tap;
avr32_build_reg_cache(target);
return ERROR_OK;
}
static int avr32_ap7k_target_create(struct target *target, Jim_Interp *interp)
{
struct avr32_ap7k_common *ap7k = calloc(1, sizeof(struct
avr32_ap7k_common));
ap7k->common_magic = AP7k_COMMON_MAGIC;
target->arch_info = ap7k;
return ERROR_OK;
}
static int avr32_ap7k_examine(struct target *target)
{
uint32_t devid, ds;
struct avr32_ap7k_common *ap7k = target_to_ap7k(target);
if (!target_was_examined(target))
{
target_set_examined(target);
avr32_jtag_nexus_read(&ap7k->jtag, AVR32_OCDREG_DID, &devid);
LOG_INFO("device id: %08x", devid);
avr32_ocd_setbits(&ap7k->jtag, AVR32_OCDREG_DC,OCDREG_DC_DBE);
avr32_jtag_nexus_read(&ap7k->jtag, AVR32_OCDREG_DS, &ds);
/* check for processor halted */
if (ds & OCDREG_DS_DBA)
{
LOG_INFO("target is halted");
target->state = TARGET_HALTED;
}
else
target->state = TARGET_RUNNING;
}
return ERROR_OK;
}