|
- /***************************************************************************
- * Copyright (C) 2006 by Dominic Rath *
- * Dominic.Rath@gmx.de *
- * *
- * 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 "replacements.h"
-
- #include "xscale.h"
-
- #include "register.h"
- #include "target.h"
- #include "armv4_5.h"
- #include "arm_simulator.h"
- #include "log.h"
- #include "jtag.h"
- #include "binarybuffer.h"
- #include "time_support.h"
- #include "breakpoints.h"
-
- #include <stdlib.h>
- #include <string.h>
-
- #include <sys/types.h>
- #include <sys/stat.h>
- #include <unistd.h>
- #include <errno.h>
-
- /* cli handling */
- int xscale_register_commands(struct command_context_s *cmd_ctx);
-
- /* forward declarations */
- int xscale_target_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc, struct target_s *target);
- int xscale_init_target(struct command_context_s *cmd_ctx, struct target_s *target);
- int xscale_quit();
-
- int xscale_arch_state(struct target_s *target, char *buf, int buf_size);
- enum target_state xscale_poll(target_t *target);
- int xscale_halt(target_t *target);
- int xscale_resume(struct target_s *target, int current, u32 address, int handle_breakpoints, int debug_execution);
- int xscale_step(struct target_s *target, int current, u32 address, int handle_breakpoints);
- int xscale_debug_entry(target_t *target);
- int xscale_restore_context(target_t *target);
-
- int xscale_assert_reset(target_t *target);
- int xscale_deassert_reset(target_t *target);
- int xscale_soft_reset_halt(struct target_s *target);
- int xscale_prepare_reset_halt(struct target_s *target);
-
- int xscale_set_reg_u32(reg_t *reg, u32 value);
-
- int xscale_read_core_reg(struct target_s *target, int num, enum armv4_5_mode mode);
- int xscale_write_core_reg(struct target_s *target, int num, enum armv4_5_mode mode, u32 value);
-
- int xscale_read_memory(struct target_s *target, u32 address, u32 size, u32 count, u8 *buffer);
- int xscale_write_memory(struct target_s *target, u32 address, u32 size, u32 count, u8 *buffer);
- int xscale_bulk_write_memory(target_t *target, u32 address, u32 count, u8 *buffer);
-
- int xscale_add_breakpoint(struct target_s *target, breakpoint_t *breakpoint);
- int xscale_remove_breakpoint(struct target_s *target, breakpoint_t *breakpoint);
- int xscale_set_breakpoint(struct target_s *target, breakpoint_t *breakpoint);
- int xscale_unset_breakpoint(struct target_s *target, breakpoint_t *breakpoint);
- int xscale_add_watchpoint(struct target_s *target, watchpoint_t *watchpoint);
- int xscale_remove_watchpoint(struct target_s *target, watchpoint_t *watchpoint);
- void xscale_enable_watchpoints(struct target_s *target);
- void xscale_enable_breakpoints(struct target_s *target);
-
- target_type_t xscale_target =
- {
- .name = "xscale",
-
- .poll = xscale_poll,
- .arch_state = xscale_arch_state,
-
- .halt = xscale_halt,
- .resume = xscale_resume,
- .step = xscale_step,
-
- .assert_reset = xscale_assert_reset,
- .deassert_reset = xscale_deassert_reset,
- .soft_reset_halt = xscale_soft_reset_halt,
- .prepare_reset_halt = xscale_prepare_reset_halt,
-
- .get_gdb_reg_list = armv4_5_get_gdb_reg_list,
-
- .read_memory = xscale_read_memory,
- .write_memory = xscale_write_memory,
- .bulk_write_memory = xscale_bulk_write_memory,
-
- .run_algorithm = armv4_5_run_algorithm,
-
- .add_breakpoint = xscale_add_breakpoint,
- .remove_breakpoint = xscale_remove_breakpoint,
- .add_watchpoint = xscale_add_watchpoint,
- .remove_watchpoint = xscale_remove_watchpoint,
-
- .register_commands = xscale_register_commands,
- .target_command = xscale_target_command,
- .init_target = xscale_init_target,
- .quit = xscale_quit
- };
-
- char* xscale_reg_list[] =
- {
- "XSCALE_MAINID", /* 0 */
- "XSCALE_CACHETYPE",
- "XSCALE_CTRL",
- "XSCALE_AUXCTRL",
- "XSCALE_TTB",
- "XSCALE_DAC",
- "XSCALE_FSR",
- "XSCALE_FAR",
- "XSCALE_PID",
- "XSCALE_CPACCESS",
- "XSCALE_IBCR0", /* 10 */
- "XSCALE_IBCR1",
- "XSCALE_DBR0",
- "XSCALE_DBR1",
- "XSCALE_DBCON",
- "XSCALE_TBREG",
- "XSCALE_CHKPT0",
- "XSCALE_CHKPT1",
- "XSCALE_DCSR",
- "XSCALE_TX",
- "XSCALE_RX", /* 20 */
- "XSCALE_TXRXCTRL",
- };
-
- xscale_reg_t xscale_reg_arch_info[] =
- {
- {XSCALE_MAINID, NULL},
- {XSCALE_CACHETYPE, NULL},
- {XSCALE_CTRL, NULL},
- {XSCALE_AUXCTRL, NULL},
- {XSCALE_TTB, NULL},
- {XSCALE_DAC, NULL},
- {XSCALE_FSR, NULL},
- {XSCALE_FAR, NULL},
- {XSCALE_PID, NULL},
- {XSCALE_CPACCESS, NULL},
- {XSCALE_IBCR0, NULL},
- {XSCALE_IBCR1, NULL},
- {XSCALE_DBR0, NULL},
- {XSCALE_DBR1, NULL},
- {XSCALE_DBCON, NULL},
- {XSCALE_TBREG, NULL},
- {XSCALE_CHKPT0, NULL},
- {XSCALE_CHKPT1, NULL},
- {XSCALE_DCSR, NULL}, /* DCSR accessed via JTAG or SW */
- {-1, NULL}, /* TX accessed via JTAG */
- {-1, NULL}, /* RX accessed via JTAG */
- {-1, NULL}, /* TXRXCTRL implicit access via JTAG */
- };
-
- int xscale_reg_arch_type = -1;
-
- int xscale_get_reg(reg_t *reg);
- int xscale_set_reg(reg_t *reg, u8 *buf);
-
- int xscale_get_arch_pointers(target_t *target, armv4_5_common_t **armv4_5_p, xscale_common_t **xscale_p)
- {
- armv4_5_common_t *armv4_5 = target->arch_info;
- xscale_common_t *xscale = armv4_5->arch_info;
-
- if (armv4_5->common_magic != ARMV4_5_COMMON_MAGIC)
- {
- return -1;
- }
-
- if (xscale->common_magic != XSCALE_COMMON_MAGIC)
- {
- return -1;
- }
-
- *armv4_5_p = armv4_5;
- *xscale_p = xscale;
-
- return ERROR_OK;
- }
-
- int xscale_jtag_set_instr(int chain_pos, u32 new_instr)
- {
- jtag_device_t *device = jtag_get_device(chain_pos);
-
- if (buf_get_u32(device->cur_instr, 0, device->ir_length) != new_instr)
- {
- scan_field_t field;
-
- field.device = chain_pos;
- field.num_bits = device->ir_length;
- field.out_value = calloc(CEIL(field.num_bits, 8), 1);
- buf_set_u32(field.out_value, 0, field.num_bits, new_instr);
- field.out_mask = NULL;
- field.in_value = NULL;
- field.in_check_value = device->expected;
- field.in_check_mask = device->expected_mask;
- field.in_handler = NULL;
- field.in_handler_priv = NULL;
-
- jtag_add_ir_scan(1, &field, -1, NULL);
-
- free(field.out_value);
- }
-
- return ERROR_OK;
- }
-
- int xscale_jtag_callback(enum jtag_event event, void *priv)
- {
- switch (event)
- {
- case JTAG_TRST_ASSERTED:
- break;
- case JTAG_TRST_RELEASED:
- break;
- case JTAG_SRST_ASSERTED:
- break;
- case JTAG_SRST_RELEASED:
- break;
- default:
- WARNING("unhandled JTAG event");
- }
-
- return ERROR_OK;
- }
-
- int xscale_read_dcsr(target_t *target)
- {
- armv4_5_common_t *armv4_5 = target->arch_info;
- xscale_common_t *xscale = armv4_5->arch_info;
-
- int retval;
-
- scan_field_t fields[3];
- u8 field0 = 0x0;
- u8 field0_check_value = 0x2;
- u8 field0_check_mask = 0x7;
- u8 field2 = 0x0;
- u8 field2_check_value = 0x0;
- u8 field2_check_mask = 0x1;
-
- jtag_add_end_state(TAP_PD);
- xscale_jtag_set_instr(xscale->jtag_info.chain_pos, xscale->jtag_info.dcsr);
-
- buf_set_u32(&field0, 1, 1, xscale->hold_rst);
- buf_set_u32(&field0, 2, 1, xscale->external_debug_break);
-
- fields[0].device = xscale->jtag_info.chain_pos;
- fields[0].num_bits = 3;
- fields[0].out_value = &field0;
- fields[0].out_mask = NULL;
- fields[0].in_value = NULL;
- fields[0].in_check_value = &field0_check_value;
- fields[0].in_check_mask = &field0_check_mask;
- fields[0].in_handler = NULL;
- fields[0].in_handler_priv = NULL;
-
- fields[1].device = xscale->jtag_info.chain_pos;
- fields[1].num_bits = 32;
- fields[1].out_value = NULL;
- fields[1].out_mask = NULL;
- fields[1].in_value = xscale->reg_cache->reg_list[XSCALE_DCSR].value;
- fields[1].in_handler = NULL;
- fields[1].in_handler_priv = NULL;
- fields[1].in_check_value = NULL;
- fields[1].in_check_mask = NULL;
-
- fields[2].device = xscale->jtag_info.chain_pos;
- fields[2].num_bits = 1;
- fields[2].out_value = &field2;
- fields[2].out_mask = NULL;
- fields[2].in_value = NULL;
- fields[2].in_check_value = &field2_check_value;
- fields[2].in_check_mask = &field2_check_mask;
- fields[2].in_handler = NULL;
- fields[2].in_handler_priv = NULL;
-
- jtag_add_dr_scan(3, fields, -1, NULL);
-
- if ((retval = jtag_execute_queue()) != ERROR_OK)
- {
- ERROR("JTAG error while reading DCSR");
- exit(-1);
- }
-
- xscale->reg_cache->reg_list[XSCALE_DCSR].dirty = 0;
- xscale->reg_cache->reg_list[XSCALE_DCSR].valid = 1;
-
- /* write the register with the value we just read
- * on this second pass, only the first bit of field0 is guaranteed to be 0)
- */
- field0_check_mask = 0x1;
- fields[1].out_value = xscale->reg_cache->reg_list[XSCALE_DCSR].value;
- fields[1].in_value = NULL;
-
- jtag_add_end_state(TAP_RTI);
-
- jtag_add_dr_scan(3, fields, -1, NULL);
-
- return ERROR_OK;
- }
-
- int xscale_receive(target_t *target, u32 *buffer, int num_words)
- {
- armv4_5_common_t *armv4_5 = target->arch_info;
- xscale_common_t *xscale = armv4_5->arch_info;
-
- enum tap_state path[3];
- scan_field_t fields[3];
-
- u8 *field0 = malloc(num_words * 1);
- u8 field0_check_value = 0x2;
- u8 field0_check_mask = 0x6;
- u32 *field1 = malloc(num_words * 4);
- u8 field2_check_value = 0x0;
- u8 field2_check_mask = 0x1;
- int words_done = 0;
- int words_scheduled = 0;
-
- int i;
- int retval;
-
- path[0] = TAP_SDS;
- path[1] = TAP_CD;
- path[2] = TAP_SD;
-
- fields[0].device = xscale->jtag_info.chain_pos;
- fields[0].num_bits = 3;
- fields[0].out_value = NULL;
- fields[0].out_mask = NULL;
- /* fields[0].in_value = field0; */
- fields[0].in_check_value = &field0_check_value;
- fields[0].in_check_mask = &field0_check_mask;
- fields[0].in_handler = NULL;
- fields[0].in_handler_priv = NULL;
-
- fields[1].device = xscale->jtag_info.chain_pos;
- fields[1].num_bits = 32;
- fields[1].out_value = NULL;
- fields[1].out_mask = NULL;
- fields[1].in_value = NULL;
- fields[1].in_handler = NULL;
- fields[1].in_handler_priv = NULL;
- fields[1].in_check_value = NULL;
- fields[1].in_check_mask = NULL;
-
- fields[2].device = xscale->jtag_info.chain_pos;
- fields[2].num_bits = 1;
- fields[2].out_value = NULL;
- fields[2].out_mask = NULL;
- fields[2].in_value = NULL;
- fields[2].in_check_value = &field2_check_value;
- fields[2].in_check_mask = &field2_check_mask;
- fields[2].in_handler = NULL;
- fields[2].in_handler_priv = NULL;
-
- jtag_add_end_state(TAP_RTI);
- xscale_jtag_set_instr(xscale->jtag_info.chain_pos, xscale->jtag_info.dbgtx);
- jtag_add_runtest(1, -1);
-
- /* repeat until all words have been collected */
- while (words_done < num_words)
- {
- /* schedule reads */
- words_scheduled = 0;
- for (i = words_done; i < num_words; i++)
- {
- fields[0].in_value = &field0[i];
- fields[1].in_handler = buf_to_u32_handler;
- fields[1].in_handler_priv = (u8*)&field1[i];
-
- jtag_add_pathmove(3, path);
- jtag_add_dr_scan(3, fields, TAP_RTI, NULL);
- words_scheduled++;
- }
-
- if ((retval = jtag_execute_queue()) != ERROR_OK)
- {
- ERROR("JTAG error while receiving data from debug handler");
- exit(-1);
- }
-
- /* examine results */
- for (i = words_done; i < num_words; i++)
- {
- if (!(field0[0] & 1))
- {
- /* move backwards if necessary */
- int j;
- for (j = i; j < num_words - 1; j++)
- {
- field0[j] = field0[j+1];
- field1[j] = field1[j+1];
- }
- words_scheduled--;
- }
- }
- words_done += words_scheduled;
- }
-
- for (i = 0; i < num_words; i++)
- *(buffer++) = buf_get_u32((u8*)&field1[i], 0, 32);
-
- free(field1);
-
- return ERROR_OK;
- }
-
- int xscale_read_tx(target_t *target, int consume)
- {
- armv4_5_common_t *armv4_5 = target->arch_info;
- xscale_common_t *xscale = armv4_5->arch_info;
- enum tap_state path[3];
-
- int retval;
- struct timeval timeout, now;
-
- scan_field_t fields[3];
- u8 field0_in = 0x0;
- u8 field0_check_value = 0x2;
- u8 field0_check_mask = 0x6;
- u8 field2_check_value = 0x0;
- u8 field2_check_mask = 0x1;
-
- jtag_add_end_state(TAP_RTI);
-
- xscale_jtag_set_instr(xscale->jtag_info.chain_pos, xscale->jtag_info.dbgtx);
-
- path[0] = TAP_SDS;
- path[1] = TAP_CD;
- path[2] = TAP_SD;
-
- fields[0].device = xscale->jtag_info.chain_pos;
- fields[0].num_bits = 3;
- fields[0].out_value = NULL;
- fields[0].out_mask = NULL;
- fields[0].in_value = &field0_in;
- fields[0].in_check_value = &field0_check_value;
- fields[0].in_check_mask = &field0_check_mask;
- fields[0].in_handler = NULL;
- fields[0].in_handler_priv = NULL;
-
- fields[1].device = xscale->jtag_info.chain_pos;
- fields[1].num_bits = 32;
- fields[1].out_value = NULL;
- fields[1].out_mask = NULL;
- fields[1].in_value = xscale->reg_cache->reg_list[XSCALE_TX].value;
- fields[1].in_handler = NULL;
- fields[1].in_handler_priv = NULL;
- fields[1].in_check_value = NULL;
- fields[1].in_check_mask = NULL;
-
- fields[2].device = xscale->jtag_info.chain_pos;
- fields[2].num_bits = 1;
- fields[2].out_value = NULL;
- fields[2].out_mask = NULL;
- fields[2].in_value = NULL;
- fields[2].in_check_value = &field2_check_value;
- fields[2].in_check_mask = &field2_check_mask;
- fields[2].in_handler = NULL;
- fields[2].in_handler_priv = NULL;
-
- gettimeofday(&timeout, NULL);
- timeval_add_time(&timeout, 5, 0);
-
- do
- {
- /* if we want to consume the register content (i.e. clear TX_READY),
- * we have to go straight from Capture-DR to Shift-DR
- * otherwise, we go from Capture-DR to Exit1-DR to Pause-DR
- */
- if (consume)
- jtag_add_pathmove(3, path);
- else
- jtag_add_statemove(TAP_PD);
-
- jtag_add_dr_scan(3, fields, TAP_RTI, NULL);
-
- if ((retval = jtag_execute_queue()) != ERROR_OK)
- {
- ERROR("JTAG error while reading TX");
- exit(-1);
- }
-
- gettimeofday(&now, NULL);
- if ((now.tv_sec > timeout.tv_sec) && (now.tv_usec > timeout.tv_usec))
- {
- ERROR("time out reading TX register");
- return ERROR_TARGET_TIMEOUT;
- }
- } while ((!(field0_in & 1)) && consume);
-
- if (!(field0_in & 1))
- return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
-
- return ERROR_OK;
- }
-
- int xscale_write_rx(target_t *target)
- {
- armv4_5_common_t *armv4_5 = target->arch_info;
- xscale_common_t *xscale = armv4_5->arch_info;
-
- int retval;
- struct timeval timeout, now;
-
- scan_field_t fields[3];
- u8 field0_out = 0x0;
- u8 field0_in = 0x0;
- u8 field0_check_value = 0x2;
- u8 field0_check_mask = 0x6;
- u8 field2 = 0x0;
- u8 field2_check_value = 0x0;
- u8 field2_check_mask = 0x1;
-
- jtag_add_end_state(TAP_RTI);
-
- xscale_jtag_set_instr(xscale->jtag_info.chain_pos, xscale->jtag_info.dbgrx);
-
- fields[0].device = xscale->jtag_info.chain_pos;
- fields[0].num_bits = 3;
- fields[0].out_value = &field0_out;
- fields[0].out_mask = NULL;
- fields[0].in_value = &field0_in;
- fields[0].in_check_value = &field0_check_value;
- fields[0].in_check_mask = &field0_check_mask;
- fields[0].in_handler = NULL;
- fields[0].in_handler_priv = NULL;
-
- fields[1].device = xscale->jtag_info.chain_pos;
- fields[1].num_bits = 32;
- fields[1].out_value = xscale->reg_cache->reg_list[XSCALE_RX].value;
- fields[1].out_mask = NULL;
- fields[1].in_value = NULL;
- fields[1].in_handler = NULL;
- fields[1].in_handler_priv = NULL;
- fields[1].in_check_value = NULL;
- fields[1].in_check_mask = NULL;
-
- fields[2].device = xscale->jtag_info.chain_pos;
- fields[2].num_bits = 1;
- fields[2].out_value = &field2;
- fields[2].out_mask = NULL;
- fields[2].in_value = NULL;
- fields[2].in_check_value = &field2_check_value;
- fields[2].in_check_mask = &field2_check_mask;
- fields[2].in_handler = NULL;
- fields[2].in_handler_priv = NULL;
-
- gettimeofday(&timeout, NULL);
- timeval_add_time(&timeout, 5, 0);
-
- /* poll until rx_read is low */
- do
- {
- DEBUG("polling RX");
- jtag_add_dr_scan(3, fields, TAP_RTI, NULL);
-
- if ((retval = jtag_execute_queue()) != ERROR_OK)
- {
- ERROR("JTAG error while writing RX");
- exit(-1);
- }
-
- gettimeofday(&now, NULL);
- if ((now.tv_sec > timeout.tv_sec) && (now.tv_usec > timeout.tv_usec))
- {
- ERROR("time out writing RX register");
- return ERROR_TARGET_TIMEOUT;
- }
- } while (field0_in & 1);
-
- /* set rx_valid */
- field2 = 0x1;
- jtag_add_dr_scan(3, fields, TAP_RTI, NULL);
-
- if ((retval = jtag_execute_queue()) != ERROR_OK)
- {
- ERROR("JTAG error while writing RX");
- exit(-1);
- }
-
- return ERROR_OK;
- }
-
- /* send count elements of size byte to the debug handler */
- int xscale_send(target_t *target, u8 *buffer, int count, int size)
- {
- armv4_5_common_t *armv4_5 = target->arch_info;
- xscale_common_t *xscale = armv4_5->arch_info;
-
- int retval;
-
- int done_count = 0;
- u8 output[4] = {0, 0, 0, 0};
-
- scan_field_t fields[3];
- u8 field0_out = 0x0;
- u8 field0_in = 0x0;
- u8 field0_check_value = 0x2;
- u8 field0_check_mask = 0x6;
- u8 field2 = 0x1;
- u8 field2_check_value = 0x0;
- u8 field2_check_mask = 0x1;
-
- jtag_add_end_state(TAP_RTI);
-
- xscale_jtag_set_instr(xscale->jtag_info.chain_pos, xscale->jtag_info.dbgrx);
-
- fields[0].device = xscale->jtag_info.chain_pos;
- fields[0].num_bits = 3;
- fields[0].out_value = &field0_out;
- fields[0].out_mask = NULL;
- fields[0].in_value = &field0_in;
- fields[0].in_check_value = &field0_check_value;
- fields[0].in_check_mask = &field0_check_mask;
- fields[0].in_handler = NULL;
- fields[0].in_handler_priv = NULL;
-
- fields[1].device = xscale->jtag_info.chain_pos;
- fields[1].num_bits = 32;
- fields[1].out_value = output;
- fields[1].out_mask = NULL;
- fields[1].in_value = NULL;
- fields[1].in_handler = NULL;
- fields[1].in_handler_priv = NULL;
- fields[1].in_check_value = NULL;
- fields[1].in_check_mask = NULL;
-
- fields[2].device = xscale->jtag_info.chain_pos;
- fields[2].num_bits = 1;
- fields[2].out_value = &field2;
- fields[2].out_mask = NULL;
- fields[2].in_value = NULL;
- fields[2].in_check_value = &field2_check_value;
- fields[2].in_check_mask = &field2_check_mask;
- fields[2].in_handler = NULL;
- fields[2].in_handler_priv = NULL;
-
- while (done_count++ < count)
- {
- /* extract sized element from target-endian buffer, and put it
- * into little-endian output buffer
- */
- switch (size)
- {
- case 4:
- buf_set_u32(output, 0, 32, target_buffer_get_u32(target, buffer));
- break;
- case 2:
- buf_set_u32(output, 0, 32, target_buffer_get_u16(target, buffer));
- break;
- case 1:
- output[0] = *buffer;
- break;
- default:
- ERROR("BUG: size neither 4, 2 nor 1");
- exit(-1);
- }
-
- jtag_add_dr_scan(3, fields, TAP_RTI, NULL);
- buffer += size;
- }
-
- if ((retval = jtag_execute_queue()) != ERROR_OK)
- {
- ERROR("JTAG error while sending data to debug handler");
- exit(-1);
- }
-
- return ERROR_OK;
- }
-
- int xscale_send_u32(target_t *target, u32 value)
- {
- armv4_5_common_t *armv4_5 = target->arch_info;
- xscale_common_t *xscale = armv4_5->arch_info;
-
- buf_set_u32(xscale->reg_cache->reg_list[XSCALE_RX].value, 0, 32, value);
- return xscale_write_rx(target);
- }
-
- int xscale_write_dcsr(target_t *target, int hold_rst, int ext_dbg_brk)
- {
- armv4_5_common_t *armv4_5 = target->arch_info;
- xscale_common_t *xscale = armv4_5->arch_info;
-
- int retval;
-
- scan_field_t fields[3];
- u8 field0 = 0x0;
- u8 field0_check_value = 0x2;
- u8 field0_check_mask = 0x7;
- u8 field2 = 0x0;
- u8 field2_check_value = 0x0;
- u8 field2_check_mask = 0x1;
-
- if (hold_rst != -1)
- xscale->hold_rst = hold_rst;
-
- if (ext_dbg_brk != -1)
- xscale->external_debug_break = ext_dbg_brk;
-
- jtag_add_end_state(TAP_RTI);
- xscale_jtag_set_instr(xscale->jtag_info.chain_pos, xscale->jtag_info.dcsr);
-
- buf_set_u32(&field0, 1, 1, xscale->hold_rst);
- buf_set_u32(&field0, 2, 1, xscale->external_debug_break);
-
- fields[0].device = xscale->jtag_info.chain_pos;
- fields[0].num_bits = 3;
- fields[0].out_value = &field0;
- fields[0].out_mask = NULL;
- fields[0].in_value = NULL;
- fields[0].in_check_value = &field0_check_value;
- fields[0].in_check_mask = &field0_check_mask;
- fields[0].in_handler = NULL;
- fields[0].in_handler_priv = NULL;
-
- fields[1].device = xscale->jtag_info.chain_pos;
- fields[1].num_bits = 32;
- fields[1].out_value = xscale->reg_cache->reg_list[XSCALE_DCSR].value;
- fields[1].out_mask = NULL;
- fields[1].in_value = NULL;
- fields[1].in_handler = NULL;
- fields[1].in_handler_priv = NULL;
- fields[1].in_check_value = NULL;
- fields[1].in_check_mask = NULL;
-
- fields[2].device = xscale->jtag_info.chain_pos;
- fields[2].num_bits = 1;
- fields[2].out_value = &field2;
- fields[2].out_mask = NULL;
- fields[2].in_value = NULL;
- fields[2].in_check_value = &field2_check_value;
- fields[2].in_check_mask = &field2_check_mask;
- fields[2].in_handler = NULL;
- fields[2].in_handler_priv = NULL;
-
- jtag_add_dr_scan(3, fields, -1, NULL);
-
- if ((retval = jtag_execute_queue()) != ERROR_OK)
- {
- ERROR("JTAG error while writing DCSR");
- exit(-1);
- }
-
- xscale->reg_cache->reg_list[XSCALE_DCSR].dirty = 0;
- xscale->reg_cache->reg_list[XSCALE_DCSR].valid = 1;
-
- return ERROR_OK;
- }
-
- /* parity of the number of bits 0 if even; 1 if odd. for 32 bit words */
- unsigned int parity (unsigned int v)
- {
- unsigned int ov = v;
- v ^= v >> 16;
- v ^= v >> 8;
- v ^= v >> 4;
- v &= 0xf;
- DEBUG("parity of 0x%x is %i", ov, (0x6996 >> v) & 1);
- return (0x6996 >> v) & 1;
- }
-
- int xscale_load_ic(target_t *target, int mini, u32 va, u32 buffer[8])
- {
- armv4_5_common_t *armv4_5 = target->arch_info;
- xscale_common_t *xscale = armv4_5->arch_info;
- u8 packet[4];
- u8 cmd;
- int word;
-
- scan_field_t fields[2];
-
- DEBUG("loading miniIC at 0x%8.8x", va);
-
- jtag_add_end_state(TAP_RTI);
- xscale_jtag_set_instr(xscale->jtag_info.chain_pos, xscale->jtag_info.ldic); /* LDIC */
-
- /* CMD is b010 for Main IC and b011 for Mini IC */
- if (mini)
- buf_set_u32(&cmd, 0, 3, 0x3);
- else
- buf_set_u32(&cmd, 0, 3, 0x2);
-
- buf_set_u32(&cmd, 3, 3, 0x0);
-
- /* virtual address of desired cache line */
- buf_set_u32(packet, 0, 27, va >> 5);
-
- fields[0].device = xscale->jtag_info.chain_pos;
- fields[0].num_bits = 6;
- fields[0].out_value = &cmd;
- fields[0].out_mask = NULL;
- fields[0].in_value = NULL;
- fields[0].in_check_value = NULL;
- fields[0].in_check_mask = NULL;
- fields[0].in_handler = NULL;
- fields[0].in_handler_priv = NULL;
-
- fields[1].device = xscale->jtag_info.chain_pos;
- fields[1].num_bits = 27;
- fields[1].out_value = packet;
- fields[1].out_mask = NULL;
- fields[1].in_value = NULL;
- fields[1].in_check_value = NULL;
- fields[1].in_check_mask = NULL;
- fields[1].in_handler = NULL;
- fields[1].in_handler_priv = NULL;
-
- jtag_add_dr_scan(2, fields, -1, NULL);
-
- fields[0].num_bits = 32;
- fields[0].out_value = packet;
-
- fields[1].num_bits = 1;
- fields[1].out_value = &cmd;
-
- for (word = 0; word < 8; word++)
- {
- buf_set_u32(packet, 0, 32, buffer[word]);
- cmd = parity(*((u32*)packet));
- jtag_add_dr_scan(2, fields, -1, NULL);
- }
-
- jtag_execute_queue();
-
- return ERROR_OK;
- }
-
- int xscale_invalidate_ic_line(target_t *target, u32 va)
- {
- armv4_5_common_t *armv4_5 = target->arch_info;
- xscale_common_t *xscale = armv4_5->arch_info;
- u8 packet[4];
- u8 cmd;
-
- scan_field_t fields[2];
-
- jtag_add_end_state(TAP_RTI);
- xscale_jtag_set_instr(xscale->jtag_info.chain_pos, xscale->jtag_info.ldic); /* LDIC */
-
- /* CMD for invalidate IC line b000, bits [6:4] b000 */
- buf_set_u32(&cmd, 0, 6, 0x0);
-
- /* virtual address of desired cache line */
- buf_set_u32(packet, 0, 27, va >> 5);
-
- fields[0].device = xscale->jtag_info.chain_pos;
- fields[0].num_bits = 6;
- fields[0].out_value = &cmd;
- fields[0].out_mask = NULL;
- fields[0].in_value = NULL;
- fields[0].in_check_value = NULL;
- fields[0].in_check_mask = NULL;
- fields[0].in_handler = NULL;
- fields[0].in_handler_priv = NULL;
-
- fields[1].device = xscale->jtag_info.chain_pos;
- fields[1].num_bits = 27;
- fields[1].out_value = packet;
- fields[1].out_mask = NULL;
- fields[1].in_value = NULL;
- fields[1].in_check_value = NULL;
- fields[1].in_check_mask = NULL;
- fields[1].in_handler = NULL;
- fields[1].in_handler_priv = NULL;
-
- jtag_add_dr_scan(2, fields, -1, NULL);
-
- return ERROR_OK;
- }
-
- int xscale_update_vectors(target_t *target)
- {
- armv4_5_common_t *armv4_5 = target->arch_info;
- xscale_common_t *xscale = armv4_5->arch_info;
- int i;
-
- u32 low_reset_branch, high_reset_branch;
-
- for (i = 1; i < 8; i++)
- {
- /* if there's a static vector specified for this exception, override */
- if (xscale->static_high_vectors_set & (1 << i))
- {
- xscale->high_vectors[i] = xscale->static_high_vectors[i];
- }
- else
- {
- if (target_read_u32(target, 0xffff0000 + 4*i, &xscale->high_vectors[i]) != ERROR_OK)
- {
- xscale->high_vectors[i] = ARMV4_5_B(0xfffffe, 0);
- }
- }
- }
-
- for (i = 1; i < 8; i++)
- {
- if (xscale->static_low_vectors_set & (1 << i))
- {
- xscale->low_vectors[i] = xscale->static_low_vectors[i];
- }
- else
- {
- if (target_read_u32(target, 0x0 + 4*i, &xscale->low_vectors[i]) != ERROR_OK)
- {
- xscale->low_vectors[i] = ARMV4_5_B(0xfffffe, 0);
- }
- }
- }
-
- /* calculate branches to debug handler */
- low_reset_branch = (xscale->handler_address + 0x20 - 0x0 - 0x8) >> 2;
- high_reset_branch = (xscale->handler_address + 0x20 - 0xffff0000 - 0x8) >> 2;
-
- xscale->low_vectors[0] = ARMV4_5_B((low_reset_branch & 0xffffff), 0);
- xscale->high_vectors[0] = ARMV4_5_B((high_reset_branch & 0xffffff), 0);
-
- /* invalidate and load exception vectors in mini i-cache */
- xscale_invalidate_ic_line(target, 0x0);
- xscale_invalidate_ic_line(target, 0xffff0000);
-
- xscale_load_ic(target, 1, 0x0, xscale->low_vectors);
- xscale_load_ic(target, 1, 0xffff0000, xscale->high_vectors);
-
- return ERROR_OK;
- }
-
- int xscale_arch_state(struct target_s *target, char *buf, int buf_size)
- {
- armv4_5_common_t *armv4_5 = target->arch_info;
- xscale_common_t *xscale = armv4_5->arch_info;
-
- char *state[] =
- {
- "disabled", "enabled"
- };
-
- char *arch_dbg_reason[] =
- {
- "", "\n(processor reset)", "\n(trace buffer full)"
- };
-
- if (armv4_5->common_magic != ARMV4_5_COMMON_MAGIC)
- {
- ERROR("BUG: called for a non-ARMv4/5 target");
- exit(-1);
- }
-
- snprintf(buf, buf_size,
- "target halted in %s state due to %s, current mode: %s\n"
- "cpsr: 0x%8.8x pc: 0x%8.8x\n"
- "MMU: %s, D-Cache: %s, I-Cache: %s"
- "%s",
- armv4_5_state_strings[armv4_5->core_state],
- target_debug_reason_strings[target->debug_reason],
- armv4_5_mode_strings[armv4_5_mode_to_number(armv4_5->core_mode)],
- buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 32),
- buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32),
- state[xscale->armv4_5_mmu.mmu_enabled],
- state[xscale->armv4_5_mmu.armv4_5_cache.d_u_cache_enabled],
- state[xscale->armv4_5_mmu.armv4_5_cache.i_cache_enabled],
- arch_dbg_reason[xscale->arch_debug_reason]);
-
- return ERROR_OK;
- }
-
- enum target_state xscale_poll(target_t *target)
- {
- int retval;
- armv4_5_common_t *armv4_5 = target->arch_info;
- xscale_common_t *xscale = armv4_5->arch_info;
-
- if ((target->state == TARGET_RUNNING) || (target->state == TARGET_DEBUG_RUNNING))
- {
- if ((retval = xscale_read_tx(target, 0)) == ERROR_OK)
- {
- /* there's data to read from the tx register, we entered debug state */
- xscale->handler_running = 1;
-
- /* process debug entry, fetching current mode regs */
- if ((retval = xscale_debug_entry(target)) != ERROR_OK)
- return retval;
-
- /* if target was running, signal that we halted
- * otherwise we reentered from debug execution */
- if (target->state == TARGET_RUNNING)
- target_call_event_callbacks(target, TARGET_EVENT_HALTED);
- else
- target_call_event_callbacks(target, TARGET_EVENT_DEBUG_HALTED);
-
- target->state = TARGET_HALTED;
- }
- else if (retval != ERROR_TARGET_RESOURCE_NOT_AVAILABLE)
- {
- ERROR("error while polling TX register");
- exit(-1);
- }
- }
-
- return target->state;
- }
-
- int xscale_debug_entry(target_t *target)
- {
- armv4_5_common_t *armv4_5 = target->arch_info;
- xscale_common_t *xscale = armv4_5->arch_info;
- u32 pc;
- u32 *buffer = malloc(4 * 10);
- int i;
-
- u32 moe;
-
- /* clear external dbg break (will be written on next DCSR read) */
- xscale->external_debug_break = 0;
- xscale_read_dcsr(target);
-
- /* get r0, pc, r1 to r7 and cpsr */
- xscale_receive(target, buffer, 10);
-
- /* move r0 from buffer to register cache */
- buf_set_u32(armv4_5->core_cache->reg_list[0].value, 0, 32, buffer[0]);
- armv4_5->core_cache->reg_list[15].dirty = 1;
- armv4_5->core_cache->reg_list[15].valid = 1;
- DEBUG("r0: 0x%8.8x", buffer[0]);
-
- /* move pc from buffer to register cache */
- buf_set_u32(armv4_5->core_cache->reg_list[15].value, 0, 32, buffer[1]);
- armv4_5->core_cache->reg_list[15].dirty = 1;
- armv4_5->core_cache->reg_list[15].valid = 1;
- DEBUG("pc: 0x%8.8x", buffer[1]);
-
- /* move data from buffer to register cache */
- for (i = 1; i <= 7; i++)
- {
- buf_set_u32(armv4_5->core_cache->reg_list[i].value, 0, 32, buffer[1 + i]);
- armv4_5->core_cache->reg_list[i].dirty = 1;
- armv4_5->core_cache->reg_list[i].valid = 1;
- DEBUG("r%i: 0x%8.8x", i, buffer[i + 1]);
- }
-
- buf_set_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 32, buffer[9]);
- armv4_5->core_cache->reg_list[ARMV4_5_CPSR].dirty = 1;
- armv4_5->core_cache->reg_list[ARMV4_5_CPSR].valid = 1;
- DEBUG("cpsr: 0x%8.8x", buffer[9]);
-
- armv4_5->core_mode = buffer[9] & 0x1f;
- if (armv4_5_mode_to_number(armv4_5->core_mode) == -1)
- {
- target->state = TARGET_UNKNOWN;
- ERROR("cpsr contains invalid mode value - communication failure");
- return ERROR_TARGET_FAILURE;
- }
- DEBUG("target entered debug state in %s mode", armv4_5_mode_strings[armv4_5_mode_to_number(armv4_5->core_mode)]);
-
- if (buffer[9] & 0x20)
- armv4_5->core_state = ARMV4_5_STATE_THUMB;
- else
- armv4_5->core_state = ARMV4_5_STATE_ARM;
-
- /* get banked registers, r8 to r14, and spsr if not in USR/SYS mode */
- if ((armv4_5->core_mode != ARMV4_5_MODE_USR) && (armv4_5->core_mode != ARMV4_5_MODE_SYS))
- {
- xscale_receive(target, buffer, 8);
- buf_set_u32(ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 16).value, 0, 32, buffer[7]);
- ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 16).dirty = 0;
- ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 16).valid = 1;
- }
- else
- {
- /* r8 to r14, but no spsr */
- xscale_receive(target, buffer, 7);
- }
-
- /* move data from buffer to register cache */
- for (i = 8; i <= 14; i++)
- {
- buf_set_u32(ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, i).value, 0, 32, buffer[i - 8]);
- ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, i).dirty = 0;
- ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, i).valid = 1;
- }
-
- /* examine debug reason */
- xscale_read_dcsr(target);
- moe = buf_get_u32(xscale->reg_cache->reg_list[XSCALE_DCSR].value, 2, 3);
-
- /* stored PC (for calculating fixup) */
- pc = buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32);
-
- switch (moe)
- {
- case 0x0: /* Processor reset */
- target->debug_reason = DBG_REASON_DBGRQ;
- xscale->arch_debug_reason = XSCALE_DBG_REASON_RESET;
- pc -= 4;
- break;
- case 0x1: /* Instruction breakpoint hit */
- target->debug_reason = DBG_REASON_BREAKPOINT;
- xscale->arch_debug_reason = XSCALE_DBG_REASON_GENERIC;
- pc -= 4;
- break;
- case 0x2: /* Data breakpoint hit */
- target->debug_reason = DBG_REASON_WATCHPOINT;
- xscale->arch_debug_reason = XSCALE_DBG_REASON_GENERIC;
- pc -= 4;
- break;
- case 0x3: /* BKPT instruction executed */
- target->debug_reason = DBG_REASON_BREAKPOINT;
- xscale->arch_debug_reason = XSCALE_DBG_REASON_GENERIC;
- pc -= 4;
- break;
- case 0x4: /* Ext. debug event */
- target->debug_reason = DBG_REASON_DBGRQ;
- xscale->arch_debug_reason = XSCALE_DBG_REASON_GENERIC;
- pc -= 4;
- break;
- case 0x5: /* Vector trap occured */
- target->debug_reason = DBG_REASON_BREAKPOINT;
- xscale->arch_debug_reason = XSCALE_DBG_REASON_GENERIC;
- pc -= 4;
- break;
- case 0x6: /* Trace buffer full break */
- target->debug_reason = DBG_REASON_DBGRQ;
- xscale->arch_debug_reason = XSCALE_DBG_REASON_TB_FULL;
- pc -= 4;
- break;
- case 0x7: /* Reserved */
- default:
- ERROR("Method of Entry is 'Reserved'");
- exit(-1);
- break;
- }
-
- /* apply PC fixup */
- buf_set_u32(armv4_5->core_cache->reg_list[15].value, 0, 32, pc);
-
- /* on the first debug entry, identify cache type */
- if (xscale->armv4_5_mmu.armv4_5_cache.ctype == -1)
- {
- u32 cache_type_reg;
-
- /* read cp15 cache type register */
- xscale_get_reg(&xscale->reg_cache->reg_list[XSCALE_CACHETYPE]);
- cache_type_reg = buf_get_u32(xscale->reg_cache->reg_list[XSCALE_CACHETYPE].value, 0, 32);
-
- armv4_5_identify_cache(cache_type_reg, &xscale->armv4_5_mmu.armv4_5_cache);
- }
-
- /* examine MMU and Cache settings */
- /* read cp15 control register */
- xscale_get_reg(&xscale->reg_cache->reg_list[XSCALE_CTRL]);
- xscale->cp15_control_reg = buf_get_u32(xscale->reg_cache->reg_list[XSCALE_CTRL].value, 0, 32);
- xscale->armv4_5_mmu.mmu_enabled = (xscale->cp15_control_reg & 0x1U) ? 1 : 0;
- xscale->armv4_5_mmu.armv4_5_cache.d_u_cache_enabled = (xscale->cp15_control_reg & 0x4U) ? 1 : 0;
- xscale->armv4_5_mmu.armv4_5_cache.i_cache_enabled = (xscale->cp15_control_reg & 0x1000U) ? 1 : 0;
-
- return ERROR_OK;
- }
-
- int xscale_halt(target_t *target)
- {
- armv4_5_common_t *armv4_5 = target->arch_info;
- xscale_common_t *xscale = armv4_5->arch_info;
-
- DEBUG("target->state: %s", target_state_strings[target->state]);
-
- if (target->state == TARGET_HALTED)
- {
- WARNING("target was already halted");
- return ERROR_TARGET_ALREADY_HALTED;
- }
- else if (target->state == TARGET_UNKNOWN)
- {
- /* this must not happen for a xscale target */
- ERROR("target was in unknown state when halt was requested");
- exit(-1);
- }
- else if (target->state == TARGET_RESET)
- {
- DEBUG("target->state == TARGET_RESET");
-
- /* clear TRST */
- jtag_add_reset(0, -1);
- }
- else
- {
- /* assert external dbg break */
- xscale->external_debug_break = 1;
- xscale_read_dcsr(target);
-
- target->debug_reason = DBG_REASON_DBGRQ;
- }
-
- return ERROR_OK;
- }
-
- int xscale_enable_single_step(struct target_s *target, u32 next_pc)
- {
- armv4_5_common_t *armv4_5 = target->arch_info;
- xscale_common_t *xscale= armv4_5->arch_info;
- reg_t *ibcr0 = &xscale->reg_cache->reg_list[XSCALE_IBCR0];
-
- if (xscale->ibcr0_used)
- {
- breakpoint_t *ibcr0_bp = breakpoint_find(target, buf_get_u32(ibcr0->value, 0, 32) & 0xfffffffe);
-
- if (ibcr0_bp)
- {
- xscale_unset_breakpoint(target, ibcr0_bp);
- }
- else
- {
- ERROR("BUG: xscale->ibcr0_used is set, but no breakpoint with that address found");
- exit(-1);
- }
- }
-
- xscale_set_reg_u32(ibcr0, next_pc | 0x1);
-
- return ERROR_OK;
- }
-
- int xscale_disable_single_step(struct target_s *target)
- {
- armv4_5_common_t *armv4_5 = target->arch_info;
- xscale_common_t *xscale= armv4_5->arch_info;
- reg_t *ibcr0 = &xscale->reg_cache->reg_list[XSCALE_IBCR0];
-
- xscale_set_reg_u32(ibcr0, 0x0);
-
- return ERROR_OK;
- }
-
- int xscale_resume(struct target_s *target, int current, u32 address, int handle_breakpoints, int debug_execution)
- {
- armv4_5_common_t *armv4_5 = target->arch_info;
- xscale_common_t *xscale= armv4_5->arch_info;
- breakpoint_t *breakpoint = target->breakpoints;
-
- u32 current_pc;
-
- int retval;
- int i;
-
- DEBUG("-");
-
- if (target->state != TARGET_HALTED)
- {
- WARNING("target not halted");
- return ERROR_TARGET_NOT_HALTED;
- }
-
- if (!debug_execution)
- {
- target_free_all_working_areas(target);
- }
-
- /* update vector tables */
- xscale_update_vectors(target);
-
- /* current = 1: continue on current pc, otherwise continue at <address> */
- if (!current)
- buf_set_u32(armv4_5->core_cache->reg_list[15].value, 0, 32, address);
-
- current_pc = buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32);
-
- /* if we're at the reset vector, we have to simulate the branch */
- if (current_pc == 0x0)
- {
- arm_simulate_step(target, NULL);
- current_pc = buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32);
- }
-
- /* the front-end may request us not to handle breakpoints */
- if (handle_breakpoints)
- {
- if ((breakpoint = breakpoint_find(target, buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32))))
- {
- u32 next_pc;
-
- /* there's a breakpoint at the current PC, we have to step over it */
- DEBUG("unset breakpoint at 0x%8.8x", breakpoint->address);
- xscale_unset_breakpoint(target, breakpoint);
-
- /* calculate PC of next instruction */
- if ((retval = arm_simulate_step(target, &next_pc)) != ERROR_OK)
- {
- u32 current_opcode;
- target_read_u32(target, current_pc, ¤t_opcode);
- ERROR("BUG: couldn't calculate PC of next instruction, current opcode was 0x%8.8x", current_opcode);
- }
-
- DEBUG("enable single-step");
- xscale_enable_single_step(target, next_pc);
-
- /* restore banked registers */
- xscale_restore_context(target);
-
- /* send resume request (command 0x30 or 0x31)
- * clean the trace buffer if it is to be enabled (0x62) */
- if (xscale->trace_buffer_enabled)
- {
- xscale_send_u32(target, 0x62);
- xscale_send_u32(target, 0x31);
- }
- else
- xscale_send_u32(target, 0x30);
-
- /* send CPSR */
- xscale_send_u32(target, buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 32));
- DEBUG("writing cpsr with value 0x%8.8x", buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 32));
-
- for (i = 7; i >= 0; i--)
- {
- /* send register */
- xscale_send_u32(target, buf_get_u32(armv4_5->core_cache->reg_list[i].value, 0, 32));
- DEBUG("writing r%i with value 0x%8.8x", i, buf_get_u32(armv4_5->core_cache->reg_list[i].value, 0, 32));
- }
-
- /* send PC */
- xscale_send_u32(target, buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32));
- DEBUG("writing PC with value 0x%8.8x", buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32));
-
- /* wait for and process debug entry */
- xscale_debug_entry(target);
-
- DEBUG("disable single-step");
- xscale_disable_single_step(target);
-
- DEBUG("set breakpoint at 0x%8.8x", breakpoint->address);
- xscale_set_breakpoint(target, breakpoint);
- }
- }
-
- /* enable any pending breakpoints and watchpoints */
- xscale_enable_breakpoints(target);
- xscale_enable_watchpoints(target);
-
- /* restore banked registers */
- xscale_restore_context(target);
-
- /* send resume request (command 0x30 or 0x31)
- * clean the trace buffer if it is to be enabled (0x62) */
- if (xscale->trace_buffer_enabled)
- {
- xscale_send_u32(target, 0x62);
- xscale_send_u32(target, 0x31);
- }
- else
- xscale_send_u32(target, 0x30);
-
- /* send CPSR */
- xscale_send_u32(target, buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 32));
- DEBUG("writing cpsr with value 0x%8.8x", buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 32));
-
- for (i = 7; i >= 0; i--)
- {
- /* send register */
- xscale_send_u32(target, buf_get_u32(armv4_5->core_cache->reg_list[i].value, 0, 32));
- DEBUG("writing r%i with value 0x%8.8x", i, buf_get_u32(armv4_5->core_cache->reg_list[i].value, 0, 32));
- }
-
- /* send PC */
- xscale_send_u32(target, buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32));
- DEBUG("writing PC with value 0x%8.8x", buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32));
-
- target->debug_reason = DBG_REASON_NOTHALTED;
-
- if (!debug_execution)
- {
- /* registers are now invalid */
- armv4_5_invalidate_core_regs(target);
- target->state = TARGET_RUNNING;
- target_call_event_callbacks(target, TARGET_EVENT_RESUMED);
- }
- else
- {
- target->state = TARGET_DEBUG_RUNNING;
- target_call_event_callbacks(target, TARGET_EVENT_DEBUG_RESUMED);
- }
-
- DEBUG("target resumed");
-
- xscale->handler_running = 1;
-
- return ERROR_OK;
- }
-
- int xscale_step(struct target_s *target, int current, u32 address, int handle_breakpoints)
- {
- armv4_5_common_t *armv4_5 = target->arch_info;
- xscale_common_t *xscale = armv4_5->arch_info;
- breakpoint_t *breakpoint = target->breakpoints;
-
- u32 current_pc, next_pc;
- int i;
- int retval;
-
- if (target->state != TARGET_HALTED)
- {
- WARNING("target not halted");
- return ERROR_TARGET_NOT_HALTED;
- }
-
- /* current = 1: continue on current pc, otherwise continue at <address> */
- if (!current)
- buf_set_u32(armv4_5->core_cache->reg_list[15].value, 0, 32, address);
-
- current_pc = buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32);
-
- /* if we're at the reset vector, we have to simulate the step */
- if (current_pc == 0x0)
- {
- arm_simulate_step(target, NULL);
- current_pc = buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32);
-
- target->debug_reason = DBG_REASON_SINGLESTEP;
- target_call_event_callbacks(target, TARGET_EVENT_HALTED);
-
- return ERROR_OK;
- }
-
- /* the front-end may request us not to handle breakpoints */
- if (handle_breakpoints)
- if ((breakpoint = breakpoint_find(target, buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32))))
- {
- xscale_unset_breakpoint(target, breakpoint);
- }
-
- target->debug_reason = DBG_REASON_SINGLESTEP;
-
- /* calculate PC of next instruction */
- if ((retval = arm_simulate_step(target, &next_pc)) != ERROR_OK)
- {
- u32 current_opcode;
- target_read_u32(target, current_pc, ¤t_opcode);
- ERROR("BUG: couldn't calculate PC of next instruction, current opcode was 0x%8.8x", current_opcode);
- }
-
- DEBUG("enable single-step");
- xscale_enable_single_step(target, next_pc);
-
- /* restore banked registers */
- xscale_restore_context(target);
-
- /* send resume request (command 0x30 or 0x31)
- * clean the trace buffer if it is to be enabled (0x62) */
- if (xscale->trace_buffer_enabled)
- {
- xscale_send_u32(target, 0x62);
- xscale_send_u32(target, 0x31);
- }
- else
- xscale_send_u32(target, 0x30);
-
- /* send CPSR */
- xscale_send_u32(target, buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 32));
- DEBUG("writing cpsr with value 0x%8.8x", buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 32));
-
- for (i = 7; i >= 0; i--)
- {
- /* send register */
- xscale_send_u32(target, buf_get_u32(armv4_5->core_cache->reg_list[i].value, 0, 32));
- DEBUG("writing r%i with value 0x%8.8x", i, buf_get_u32(armv4_5->core_cache->reg_list[i].value, 0, 32));
- }
-
- /* send PC */
- xscale_send_u32(target, buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32));
- DEBUG("writing PC with value 0x%8.8x", buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32));
-
- target_call_event_callbacks(target, TARGET_EVENT_RESUMED);
-
- /* registers are now invalid */
- armv4_5_invalidate_core_regs(target);
-
- /* wait for and process debug entry */
- xscale_debug_entry(target);
-
- DEBUG("disable single-step");
- xscale_disable_single_step(target);
-
- target_call_event_callbacks(target, TARGET_EVENT_HALTED);
-
- if (breakpoint)
- {
- xscale_set_breakpoint(target, breakpoint);
- }
-
- DEBUG("target stepped");
-
- return ERROR_OK;
-
- }
-
- int xscale_assert_reset(target_t *target)
- {
- armv4_5_common_t *armv4_5 = target->arch_info;
- xscale_common_t *xscale = armv4_5->arch_info;
-
- DEBUG("target->state: %s", target_state_strings[target->state]);
-
- /* if the handler isn't installed yet, we have to assert TRST, too */
- if (!xscale->handler_installed)
- {
- jtag_add_reset(1, 1);
- }
- else
- jtag_add_reset(-1, 1);
-
- /* sleep 1ms, to be sure we fulfill any requirements */
- jtag_add_sleep(1000);
-
- target->state = TARGET_RESET;
-
- return ERROR_OK;
-
- }
-
- int xscale_deassert_reset(target_t *target)
- {
- armv4_5_common_t *armv4_5 = target->arch_info;
- xscale_common_t *xscale = armv4_5->arch_info;
-
- FILE *binary;
- u32 address;
- struct stat binary_stat;
- u32 binary_size;
-
- u32 buffer[8];
- u32 buf_cnt;
- int i;
-
- breakpoint_t *breakpoint = target->breakpoints;
-
- xscale->ibcr_available = 2;
- xscale->ibcr0_used = 0;
- xscale->ibcr1_used = 0;
-
- xscale->dbr_available = 2;
- xscale->dbr0_used = 0;
- xscale->dbr1_used = 0;
-
- /* mark all hardware breakpoints as unset */
- while (breakpoint)
- {
- if (breakpoint->type == BKPT_HARD)
- {
- breakpoint->set = 0;
- }
- breakpoint = breakpoint->next;
- }
-
- if (!xscale->handler_installed)
- {
- /* release TRST */
- jtag_add_reset(0, -1);
- jtag_add_sleep(100000);
-
- /* set Hold reset, Halt mode and Trap Reset */
- buf_set_u32(xscale->reg_cache->reg_list[XSCALE_DCSR].value, 30, 1, 0x1);
- buf_set_u32(xscale->reg_cache->reg_list[XSCALE_DCSR].value, 16, 1, 0x1);
- xscale_write_dcsr(target, 1, 0);
- jtag_add_runtest(100, TAP_RTI);
- jtag_execute_queue();
-
- /* release SRST */
- jtag_add_reset(0, 0);
- /* wait 150ms; 100ms were not enough */
- jtag_add_sleep(150000);
-
- jtag_add_runtest(2030, TAP_RTI);
- jtag_execute_queue();
-
- xscale_write_dcsr(target, 1, 0);
- jtag_execute_queue();
-
- /* TODO: load debug handler */
- if (stat("target/xscale/debug_handler.bin", &binary_stat) == -1)
- {
- ERROR("couldn't stat() target/xscale/debug_handler.bin: %s", strerror(errno));
- return ERROR_OK;
- }
-
- if (!(binary = fopen("target/xscale/debug_handler.bin", "r")))
- {
- ERROR("couldn't open target/xscale/debug_handler.bin: %s", strerror(errno));
- return ERROR_OK;
- }
-
- if ((binary_size = binary_stat.st_size) % 4)
- {
- ERROR("debug_handler.bin: size not a multiple of 4");
- exit(-1);
- }
-
- if (binary_size > 0x800)
- {
- ERROR("debug_handler.bin: larger than 2kb");
- exit(-1);
- }
-
- binary_size = CEIL(binary_size, 32) * 32;
-
- address = xscale->handler_address;
- while (binary_size > 0)
- {
- buf_cnt = fread(buffer, 4, 8, binary);
-
- for (i = 0; i < buf_cnt; i++)
- {
- /* convert LE buffer to host-endian u32 */
- buffer[i] = buf_get_u32((u8*)(&buffer[i]), 0, 32);
- }
-
- if (buf_cnt < 8)
- {
- for (; buf_cnt < 8; buf_cnt++)
- {
- buffer[buf_cnt] = 0xe1a08008;
- }
- }
-
- /* only load addresses other than the reset vectors */
- if ((address % 0x400) != 0x0)
- {
- xscale_load_ic(target, 1, address, buffer);
- }
-
- address += buf_cnt * 4;
- binary_size -= buf_cnt * 4;
- };
-
- xscale_load_ic(target, 1, 0x0, xscale->low_vectors);
- xscale_load_ic(target, 1, 0xffff0000, xscale->high_vectors);
-
- jtag_add_runtest(30, TAP_RTI);
-
- /* let the target run (should enter debug handler) */
- xscale_write_dcsr(target, 0, 0);
- target->state = TARGET_RUNNING;
-
- if ((target->reset_mode != RESET_HALT) && (target->reset_mode != RESET_INIT))
- {
- jtag_add_sleep(10000);
-
- /* we should have entered debug now */
- xscale_debug_entry(target);
- target->state = TARGET_HALTED;
-
- /* the PC is now at 0x0 */
- buf_set_u32(armv4_5->core_cache->reg_list[15].value, 0, 32, 0x0);
- }
- }
- else
- {
- jtag_add_reset(0, 0);
- }
-
-
- return ERROR_OK;
- }
-
- int xscale_soft_reset_halt(struct target_s *target)
- {
-
- return ERROR_OK;
- }
-
- int xscale_prepare_reset_halt(struct target_s *target)
- {
- /* nothing to be done for reset_halt on XScale targets */
- return ERROR_OK;
- }
-
- int xscale_read_core_reg(struct target_s *target, int num, enum armv4_5_mode mode)
- {
-
- return ERROR_OK;
- }
-
- int xscale_write_core_reg(struct target_s *target, int num, enum armv4_5_mode mode, u32 value)
- {
-
- return ERROR_OK;
- }
-
- int xscale_full_context(target_t *target)
- {
- armv4_5_common_t *armv4_5 = target->arch_info;
-
- u32 *buffer;
-
- int i, j;
-
- DEBUG("-");
-
- if (target->state != TARGET_HALTED)
- {
- WARNING("target not halted");
- return ERROR_TARGET_NOT_HALTED;
- }
-
- buffer = malloc(4 * 8);
-
- /* iterate through processor modes (FIQ, IRQ, SVC, ABT, UND and SYS)
- * we can't enter User mode on an XScale (unpredictable),
- * but User shares registers with SYS
- */
- for(i = 1; i < 7; i++)
- {
- int valid = 1;
-
- /* check if there are invalid registers in the current mode
- */
- for (j = 0; j <= 16; j++)
- {
- if (ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_number_to_mode(i), j).valid == 0)
- valid = 0;
- }
-
- if (!valid)
- {
- u32 tmp_cpsr;
-
- /* request banked registers */
- xscale_send_u32(target, 0x0);
-
- tmp_cpsr = 0x0;
- tmp_cpsr |= armv4_5_number_to_mode(i);
- tmp_cpsr |= 0xc0; /* I/F bits */
-
- /* send CPSR for desired mode */
- xscale_send_u32(target, tmp_cpsr);
-
- /* get banked registers, r8 to r14, and spsr if not in USR/SYS mode */
- if ((armv4_5_number_to_mode(i) != ARMV4_5_MODE_USR) && (armv4_5_number_to_mode(i) != ARMV4_5_MODE_SYS))
- {
- xscale_receive(target, buffer, 8);
- buf_set_u32(ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 16).value, 0, 32, buffer[7]);
- ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_number_to_mode(i), 16).dirty = 0;
- ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_number_to_mode(i), 16).valid = 1;
- }
- else
- {
- xscale_receive(target, buffer, 7);
- }
-
- /* move data from buffer to register cache */
- for (j = 8; j <= 14; j++)
- {
- buf_set_u32(ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_number_to_mode(i), j).value, 0, 32, buffer[j - 8]);
- ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_number_to_mode(i), j).dirty = 0;
- ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_number_to_mode(i), j).valid = 1;
- }
- }
- }
-
- free(buffer);
-
- return ERROR_OK;
- }
-
- int xscale_restore_context(target_t *target)
- {
- armv4_5_common_t *armv4_5 = target->arch_info;
-
- int i, j;
-
- DEBUG("-");
-
- if (target->state != TARGET_HALTED)
- {
- WARNING("target not halted");
- return ERROR_TARGET_NOT_HALTED;
- }
-
- /* iterate through processor modes (FIQ, IRQ, SVC, ABT, UND and SYS)
- * we can't enter User mode on an XScale (unpredictable),
- * but User shares registers with SYS
- */
- for(i = 1; i < 7; i++)
- {
- int dirty = 0;
-
- /* check if there are invalid registers in the current mode
- */
- for (j = 8; j <= 14; j++)
- {
- if (ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_number_to_mode(i), j).dirty == 1)
- dirty = 1;
- }
-
- /* if not USR/SYS, check if the SPSR needs to be written */
- if ((armv4_5_number_to_mode(i) != ARMV4_5_MODE_USR) && (armv4_5_number_to_mode(i) != ARMV4_5_MODE_SYS))
- {
- if (ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_number_to_mode(i), 16).dirty == 1)
- dirty = 1;
- }
-
- if (dirty)
- {
- u32 tmp_cpsr;
-
- /* send banked registers */
- xscale_send_u32(target, 0x1);
-
- tmp_cpsr = 0x0;
- tmp_cpsr |= armv4_5_number_to_mode(i);
- tmp_cpsr |= 0xc0; /* I/F bits */
-
- /* send CPSR for desired mode */
- xscale_send_u32(target, tmp_cpsr);
-
- /* send banked registers, r8 to r14, and spsr if not in USR/SYS mode */
- for (j = 8; j <= 14; j++)
- {
- xscale_send_u32(target, buf_get_u32(ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, j).value, 0, 32));
- ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_number_to_mode(i), j).dirty = 0;
- }
-
- if ((armv4_5_number_to_mode(i) != ARMV4_5_MODE_USR) && (armv4_5_number_to_mode(i) != ARMV4_5_MODE_SYS))
- {
- xscale_send_u32(target, buf_get_u32(ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 16).value, 0, 32));
- ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_number_to_mode(i), 16).dirty = 0;
- }
- }
- }
-
- return ERROR_OK;
- }
-
- int xscale_read_memory(struct target_s *target, u32 address, u32 size, u32 count, u8 *buffer)
- {
- armv4_5_common_t *armv4_5 = target->arch_info;
- xscale_common_t *xscale = armv4_5->arch_info;
- u32 *buf32;
- int i;
-
- DEBUG("address: 0x%8.8x, size: 0x%8.8x, count: 0x%8.8x", address, size, count);
-
- if (target->state != TARGET_HALTED)
- {
- 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;
-
- /* send memory read request (command 0x1n, n: access size) */
- xscale_send_u32(target, 0x10 | size);
-
- /* send base address for read request */
- xscale_send_u32(target, address);
-
- /* send number of requested data words */
- xscale_send_u32(target, count);
-
- /* receive data from target (count times 32-bit words in host endianness) */
- buf32 = malloc(4 * count);
- xscale_receive(target, buf32, count);
-
- /* extract data from host-endian buffer into byte stream */
- for (i = 0; i < count; i++)
- {
- switch (size)
- {
- case 4:
- target_buffer_set_u32(target, buffer, buf32[i]);
- buffer += 4;
- break;
- case 2:
- target_buffer_set_u16(target, buffer, buf32[i] & 0xffff);
- buffer += 2;
- break;
- case 1:
- *buffer++ = buf32[i] & 0xff;
- break;
- default:
- ERROR("should never get here");
- exit(-1);
- }
- }
-
- free(buf32);
-
- /* examine DCSR, to see if Sticky Abort (SA) got set */
- xscale_read_dcsr(target);
- if (buf_get_u32(xscale->reg_cache->reg_list[XSCALE_DCSR].value, 5, 1) == 1)
- {
- /* clear SA bit */
- xscale_send_u32(target, 0x60);
-
- return ERROR_TARGET_DATA_ABORT;
- }
-
- return ERROR_OK;
- }
-
- int xscale_write_memory(struct target_s *target, u32 address, u32 size, u32 count, u8 *buffer)
- {
- armv4_5_common_t *armv4_5 = target->arch_info;
- xscale_common_t *xscale = armv4_5->arch_info;
-
- DEBUG("address: 0x%8.8x, size: 0x%8.8x, count: 0x%8.8x", address, size, count);
-
- if (target->state != TARGET_HALTED)
- {
- 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;
-
- /* send memory write request (command 0x2n, n: access size) */
- xscale_send_u32(target, 0x20 | size);
-
- /* send base address for read request */
- xscale_send_u32(target, address);
-
- /* send number of requested data words to be written*/
- xscale_send_u32(target, count);
-
- /* extract data from host-endian buffer into byte stream */
- #if 0
- for (i = 0; i < count; i++)
- {
- switch (size)
- {
- case 4:
- value = target_buffer_get_u32(target, buffer);
- xscale_send_u32(target, value);
- buffer += 4;
- break;
- case 2:
- value = target_buffer_get_u16(target, buffer);
- xscale_send_u32(target, value);
- buffer += 2;
- break;
- case 1:
- value = *buffer;
- xscale_send_u32(target, value);
- buffer += 1;
- break;
- default:
- ERROR("should never get here");
- exit(-1);
- }
- }
- #endif
- xscale_send(target, buffer, count, size);
-
- /* examine DCSR, to see if Sticky Abort (SA) got set */
- xscale_read_dcsr(target);
- if (buf_get_u32(xscale->reg_cache->reg_list[XSCALE_DCSR].value, 5, 1) == 1)
- {
- /* clear SA bit */
- xscale_send_u32(target, 0x60);
-
- return ERROR_TARGET_DATA_ABORT;
- }
-
- return ERROR_OK;
- }
-
- int xscale_bulk_write_memory(target_t *target, u32 address, u32 count, u8 *buffer)
- {
- xscale_write_memory(target, address, 4, count, buffer);
-
- return ERROR_OK;
- }
-
- u32 xscale_get_ttb(target_t *target)
- {
- armv4_5_common_t *armv4_5 = target->arch_info;
- xscale_common_t *xscale = armv4_5->arch_info;
- u32 ttb;
-
- xscale_get_reg(&xscale->reg_cache->reg_list[XSCALE_TTB]);
- ttb = buf_get_u32(xscale->reg_cache->reg_list[XSCALE_TTB].value, 0, 32);
-
- return ttb;
- }
-
- void xscale_disable_mmu_caches(target_t *target, int mmu, int d_u_cache, int i_cache)
- {
- armv4_5_common_t *armv4_5 = target->arch_info;
- xscale_common_t *xscale = armv4_5->arch_info;
- u32 cp15_control;
-
- /* read cp15 control register */
- xscale_get_reg(&xscale->reg_cache->reg_list[XSCALE_CTRL]);
- cp15_control = buf_get_u32(xscale->reg_cache->reg_list[XSCALE_CTRL].value, 0, 32);
-
- if (mmu)
- cp15_control &= ~0x1U;
-
- if (d_u_cache)
- {
- /* clean DCache */
- xscale_send_u32(target, 0x50);
- xscale_send_u32(target, xscale->cache_clean_address);
-
- /* invalidate DCache */
- xscale_send_u32(target, 0x51);
-
- cp15_control &= ~0x4U;
- }
-
- if (i_cache)
- {
- /* invalidate ICache */
- xscale_send_u32(target, 0x52);
- cp15_control &= ~0x1000U;
- }
-
- /* write new cp15 control register */
- xscale_set_reg_u32(&xscale->reg_cache->reg_list[XSCALE_CTRL], cp15_control);
-
- /* execute cpwait to ensure outstanding operations complete */
- xscale_send_u32(target, 0x53);
- }
-
- void xscale_enable_mmu_caches(target_t *target, int mmu, int d_u_cache, int i_cache)
- {
- armv4_5_common_t *armv4_5 = target->arch_info;
- xscale_common_t *xscale = armv4_5->arch_info;
- u32 cp15_control;
-
- /* read cp15 control register */
- xscale_get_reg(&xscale->reg_cache->reg_list[XSCALE_CTRL]);
- cp15_control = buf_get_u32(xscale->reg_cache->reg_list[XSCALE_CTRL].value, 0, 32);
-
- if (mmu)
- cp15_control |= 0x1U;
-
- if (d_u_cache)
- cp15_control |= 0x4U;
-
- if (i_cache)
- cp15_control |= 0x1000U;
-
- /* write new cp15 control register */
- xscale_set_reg_u32(&xscale->reg_cache->reg_list[XSCALE_CTRL], cp15_control);
-
- /* execute cpwait to ensure outstanding operations complete */
- xscale_send_u32(target, 0x53);
- }
-
- int xscale_set_breakpoint(struct target_s *target, breakpoint_t *breakpoint)
- {
- armv4_5_common_t *armv4_5 = target->arch_info;
- xscale_common_t *xscale = armv4_5->arch_info;
-
- if (target->state != TARGET_HALTED)
- {
- WARNING("target not halted");
- return ERROR_TARGET_NOT_HALTED;
- }
-
- if (xscale->force_hw_bkpts)
- breakpoint->type = BKPT_HARD;
-
- if (breakpoint->set)
- {
- WARNING("breakpoint already set");
- return ERROR_OK;
- }
-
- if (breakpoint->type == BKPT_HARD)
- {
- u32 value = breakpoint->address | 1;
- if (!xscale->ibcr0_used)
- {
- xscale_set_reg_u32(&xscale->reg_cache->reg_list[XSCALE_IBCR0], value);
- xscale->ibcr0_used = 1;
- breakpoint->set = 1; /* breakpoint set on first breakpoint register */
- }
- else if (!xscale->ibcr1_used)
- {
- xscale_set_reg_u32(&xscale->reg_cache->reg_list[XSCALE_IBCR1], value);
- xscale->ibcr1_used = 1;
- breakpoint->set = 2; /* breakpoint set on second breakpoint register */
- }
- else
- {
- ERROR("BUG: no hardware comparator available");
- return ERROR_OK;
- }
- }
- else if (breakpoint->type == BKPT_SOFT)
- {
- if (breakpoint->length == 4)
- {
- /* keep the original instruction in target endianness */
- target->type->read_memory(target, breakpoint->address, 4, 1, breakpoint->orig_instr);
- /* write the original instruction in target endianness (arm7_9->arm_bkpt is host endian) */
- target_write_u32(target, breakpoint->address, xscale->arm_bkpt);
- }
- else
- {
- /* keep the original instruction in target endianness */
- target->type->read_memory(target, breakpoint->address, 2, 1, breakpoint->orig_instr);
- /* write the original instruction in target endianness (arm7_9->arm_bkpt is host endian) */
- target_write_u32(target, breakpoint->address, xscale->thumb_bkpt);
- }
- breakpoint->set = 1;
- }
-
- return ERROR_OK;
-
- }
-
- int xscale_add_breakpoint(struct target_s *target, breakpoint_t *breakpoint)
- {
- armv4_5_common_t *armv4_5 = target->arch_info;
- xscale_common_t *xscale = armv4_5->arch_info;
-
- if (target->state != TARGET_HALTED)
- {
- WARNING("target not halted");
- return ERROR_TARGET_NOT_HALTED;
- }
-
- if (xscale->force_hw_bkpts)
- {
- DEBUG("forcing use of hardware breakpoint at address 0x%8.8x", breakpoint->address);
- breakpoint->type = BKPT_HARD;
- }
-
- if ((breakpoint->type == BKPT_HARD) && (xscale->ibcr_available < 1))
- {
- INFO("no breakpoint unit available for hardware breakpoint");
- return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
- }
- else
- {
- xscale->ibcr_available--;
- }
-
- if ((breakpoint->length != 2) && (breakpoint->length != 4))
- {
- INFO("only breakpoints of two (Thumb) or four (ARM) bytes length supported");
- return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
- }
-
- return ERROR_OK;
- }
-
- int xscale_unset_breakpoint(struct target_s *target, breakpoint_t *breakpoint)
- {
- armv4_5_common_t *armv4_5 = target->arch_info;
- xscale_common_t *xscale = armv4_5->arch_info;
-
- if (target->state != TARGET_HALTED)
- {
- WARNING("target not halted");
- return ERROR_TARGET_NOT_HALTED;
- }
-
- if (!breakpoint->set)
- {
- WARNING("breakpoint not set");
- return ERROR_OK;
- }
-
- if (breakpoint->type == BKPT_HARD)
- {
- if (breakpoint->set == 1)
- {
- xscale_set_reg_u32(&xscale->reg_cache->reg_list[XSCALE_IBCR0], 0x0);
- xscale->ibcr0_used = 0;
- }
- else if (breakpoint->set == 2)
- {
- xscale_set_reg_u32(&xscale->reg_cache->reg_list[XSCALE_IBCR1], 0x0);
- xscale->ibcr1_used = 0;
- }
- breakpoint->set = 0;
- }
- else
- {
- /* restore original instruction (kept in target endianness) */
- if (breakpoint->length == 4)
- {
- target->type->write_memory(target, breakpoint->address, 4, 1, breakpoint->orig_instr);
- }
- else
- {
- target->type->write_memory(target, breakpoint->address, 2, 1, breakpoint->orig_instr);
- }
- breakpoint->set = 0;
- }
-
- return ERROR_OK;
- }
-
- int xscale_remove_breakpoint(struct target_s *target, breakpoint_t *breakpoint)
- {
- armv4_5_common_t *armv4_5 = target->arch_info;
- xscale_common_t *xscale = armv4_5->arch_info;
-
- if (target->state != TARGET_HALTED)
- {
- WARNING("target not halted");
- return ERROR_TARGET_NOT_HALTED;
- }
-
- if (breakpoint->set)
- {
- xscale_unset_breakpoint(target, breakpoint);
- }
-
- if (breakpoint->type == BKPT_HARD)
- xscale->ibcr_available++;
-
- return ERROR_OK;
- }
-
- int xscale_set_watchpoint(struct target_s *target, watchpoint_t *watchpoint)
- {
- armv4_5_common_t *armv4_5 = target->arch_info;
- xscale_common_t *xscale = armv4_5->arch_info;
- u8 enable;
- reg_t *dbcon = &xscale->reg_cache->reg_list[XSCALE_DBCON];
- u32 dbcon_value = buf_get_u32(dbcon->value, 0, 32);
-
- if (target->state != TARGET_HALTED)
- {
- WARNING("target not halted");
- return ERROR_TARGET_NOT_HALTED;
- }
-
- xscale_get_reg(dbcon);
-
- switch (watchpoint->rw)
- {
- case WPT_READ:
- enable = 0x3;
- break;
- case WPT_ACCESS:
- enable = 0x2;
- break;
- case WPT_WRITE:
- enable = 0x1;
- break;
- default:
- ERROR("BUG: watchpoint->rw neither read, write nor access");
- }
-
- if (!xscale->dbr0_used)
- {
- xscale_set_reg_u32(&xscale->reg_cache->reg_list[XSCALE_DBR0], watchpoint->address);
- dbcon_value |= enable;
- xscale_set_reg_u32(dbcon, dbcon_value);
- watchpoint->set = 1;
- xscale->dbr0_used = 1;
- }
- else if (!xscale->dbr1_used)
- {
- xscale_set_reg_u32(&xscale->reg_cache->reg_list[XSCALE_DBR1], watchpoint->address);
- dbcon_value |= enable << 2;
- xscale_set_reg_u32(dbcon, dbcon_value);
- watchpoint->set = 2;
- xscale->dbr1_used = 1;
- }
- else
- {
- ERROR("BUG: no hardware comparator available");
- return ERROR_OK;
- }
-
- return ERROR_OK;
- }
-
- int xscale_add_watchpoint(struct target_s *target, watchpoint_t *watchpoint)
- {
- armv4_5_common_t *armv4_5 = target->arch_info;
- xscale_common_t *xscale = armv4_5->arch_info;
-
- if (target->state != TARGET_HALTED)
- {
- WARNING("target not halted");
- return ERROR_TARGET_NOT_HALTED;
- }
-
- if (xscale->dbr_available < 1)
- {
- return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
- }
-
- if ((watchpoint->length != 1) && (watchpoint->length != 2) && (watchpoint->length != 4))
- {
- return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
- }
-
- xscale->dbr_available--;
-
- return ERROR_OK;
- }
-
- int xscale_unset_watchpoint(struct target_s *target, watchpoint_t *watchpoint)
- {
- armv4_5_common_t *armv4_5 = target->arch_info;
- xscale_common_t *xscale = armv4_5->arch_info;
- reg_t *dbcon = &xscale->reg_cache->reg_list[XSCALE_DBCON];
- u32 dbcon_value = buf_get_u32(dbcon->value, 0, 32);
-
- if (target->state != TARGET_HALTED)
- {
- WARNING("target not halted");
- return ERROR_TARGET_NOT_HALTED;
- }
-
- if (!watchpoint->set)
- {
- WARNING("breakpoint not set");
- return ERROR_OK;
- }
-
- if (watchpoint->set == 1)
- {
- dbcon_value &= ~0x3;
- xscale_set_reg_u32(dbcon, dbcon_value);
- xscale->dbr0_used = 0;
- }
- else if (watchpoint->set == 2)
- {
- dbcon_value &= ~0xc;
- xscale_set_reg_u32(dbcon, dbcon_value);
- xscale->dbr1_used = 0;
- }
- watchpoint->set = 0;
-
- return ERROR_OK;
- }
-
- int xscale_remove_watchpoint(struct target_s *target, watchpoint_t *watchpoint)
- {
- armv4_5_common_t *armv4_5 = target->arch_info;
- xscale_common_t *xscale = armv4_5->arch_info;
-
- if (target->state != TARGET_HALTED)
- {
- WARNING("target not halted");
- return ERROR_TARGET_NOT_HALTED;
- }
-
- if (watchpoint->set)
- {
- xscale_unset_watchpoint(target, watchpoint);
- }
-
- xscale->dbr_available++;
-
- return ERROR_OK;
- }
-
- void xscale_enable_watchpoints(struct target_s *target)
- {
- watchpoint_t *watchpoint = target->watchpoints;
-
- while (watchpoint)
- {
- if (watchpoint->set == 0)
- xscale_set_watchpoint(target, watchpoint);
- watchpoint = watchpoint->next;
- }
- }
-
- void xscale_enable_breakpoints(struct target_s *target)
- {
- breakpoint_t *breakpoint = target->breakpoints;
-
- /* set any pending breakpoints */
- while (breakpoint)
- {
- if (breakpoint->set == 0)
- xscale_set_breakpoint(target, breakpoint);
- breakpoint = breakpoint->next;
- }
- }
-
- int xscale_get_reg(reg_t *reg)
- {
- xscale_reg_t *arch_info = reg->arch_info;
- target_t *target = arch_info->target;
- armv4_5_common_t *armv4_5 = target->arch_info;
- xscale_common_t *xscale = armv4_5->arch_info;
-
- /* DCSR, TX and RX are accessible via JTAG */
- if (strcmp(reg->name, "XSCALE_DCSR") == 0)
- {
- return xscale_read_dcsr(arch_info->target);
- }
- else if (strcmp(reg->name, "XSCALE_TX") == 0)
- {
- /* 1 = consume register content */
- return xscale_read_tx(arch_info->target, 1);
- }
- else if (strcmp(reg->name, "XSCALE_RX") == 0)
- {
- /* can't read from RX register (host -> debug handler) */
- return ERROR_OK;
- }
- else if (strcmp(reg->name, "XSCALE_TXRXCTRL") == 0)
- {
- /* can't (explicitly) read from TXRXCTRL register */
- return ERROR_OK;
- }
- else /* Other DBG registers have to be transfered by the debug handler */
- {
- /* send CP read request (command 0x40) */
- xscale_send_u32(target, 0x40);
-
- /* send CP register number */
- xscale_send_u32(target, arch_info->dbg_handler_number);
-
- /* read register value */
- xscale_read_tx(target, 1);
- buf_cpy(xscale->reg_cache->reg_list[XSCALE_TX].value, reg->value, 32);
-
- reg->dirty = 0;
- reg->valid = 1;
- }
-
- return ERROR_OK;
- }
-
- int xscale_set_reg(reg_t *reg, u8* buf)
- {
- xscale_reg_t *arch_info = reg->arch_info;
- target_t *target = arch_info->target;
- armv4_5_common_t *armv4_5 = target->arch_info;
- xscale_common_t *xscale = armv4_5->arch_info;
- u32 value = buf_get_u32(buf, 0, 32);
-
- /* DCSR, TX and RX are accessible via JTAG */
- if (strcmp(reg->name, "XSCALE_DCSR") == 0)
- {
- buf_set_u32(xscale->reg_cache->reg_list[XSCALE_DCSR].value, 0, 32, value);
- return xscale_write_dcsr(arch_info->target, -1, -1);
- }
- else if (strcmp(reg->name, "XSCALE_RX") == 0)
- {
- buf_set_u32(xscale->reg_cache->reg_list[XSCALE_RX].value, 0, 32, value);
- return xscale_write_rx(arch_info->target);
- }
- else if (strcmp(reg->name, "XSCALE_TX") == 0)
- {
- /* can't write to TX register (debug-handler -> host) */
- return ERROR_OK;
- }
- else if (strcmp(reg->name, "XSCALE_TXRXCTRL") == 0)
- {
- /* can't (explicitly) write to TXRXCTRL register */
- return ERROR_OK;
- }
- else /* Other DBG registers have to be transfered by the debug handler */
- {
- /* send CP write request (command 0x41) */
- xscale_send_u32(target, 0x41);
-
- /* send CP register number */
- xscale_send_u32(target, arch_info->dbg_handler_number);
-
- /* send CP register value */
- xscale_send_u32(target, value);
- buf_set_u32(reg->value, 0, 32, value);
- }
-
- return ERROR_OK;
- }
-
- /* convenience wrapper to access XScale specific registers */
- int xscale_set_reg_u32(reg_t *reg, u32 value)
- {
- u8 buf[4];
-
- buf_set_u32(buf, 0, 32, value);
-
- return xscale_set_reg(reg, buf);
- }
-
- int xscale_write_dcsr_sw(target_t *target, u32 value)
- {
- /* get pointers to arch-specific information */
- armv4_5_common_t *armv4_5 = target->arch_info;
- xscale_common_t *xscale = armv4_5->arch_info;
- reg_t *dcsr = &xscale->reg_cache->reg_list[XSCALE_DCSR];
- xscale_reg_t *dcsr_arch_info = dcsr->arch_info;
-
- /* send CP write request (command 0x41) */
- xscale_send_u32(target, 0x41);
-
- /* send CP register number */
- xscale_send_u32(target, dcsr_arch_info->dbg_handler_number);
-
- /* send CP register value */
- xscale_send_u32(target, value);
- buf_set_u32(dcsr->value, 0, 32, value);
-
- return ERROR_OK;
- }
-
- void xscale_build_reg_cache(target_t *target)
- {
- /* get pointers to arch-specific information */
- armv4_5_common_t *armv4_5 = target->arch_info;
- xscale_common_t *xscale = armv4_5->arch_info;
-
- reg_cache_t **cache_p = register_get_last_cache_p(&target->reg_cache);
- xscale_reg_t *arch_info = malloc(sizeof(xscale_reg_arch_info));
- int i;
- int num_regs = sizeof(xscale_reg_arch_info) / sizeof(xscale_reg_t);
-
- (*cache_p) = armv4_5_build_reg_cache(target, armv4_5);
- armv4_5->core_cache = (*cache_p);
-
- /* register a register arch-type for XScale dbg registers only once */
- if (xscale_reg_arch_type == -1)
- xscale_reg_arch_type = register_reg_arch_type(xscale_get_reg, xscale_set_reg);
-
- (*cache_p)->next = malloc(sizeof(reg_cache_t));
- cache_p = &(*cache_p)->next;
-
- /* fill in values for the xscale reg cache */
- (*cache_p)->name = "XScale registers";
- (*cache_p)->next = NULL;
- (*cache_p)->reg_list = malloc(num_regs * sizeof(reg_t));
- (*cache_p)->num_regs = num_regs;
-
- for (i = 0; i < num_regs; i++)
- {
- (*cache_p)->reg_list[i].name = xscale_reg_list[i];
- (*cache_p)->reg_list[i].value = calloc(4, 1);
- (*cache_p)->reg_list[i].dirty = 0;
- (*cache_p)->reg_list[i].valid = 0;
- (*cache_p)->reg_list[i].size = 32;
- (*cache_p)->reg_list[i].bitfield_desc = NULL;
- (*cache_p)->reg_list[i].num_bitfields = 0;
- (*cache_p)->reg_list[i].arch_info = &arch_info[i];
- (*cache_p)->reg_list[i].arch_type = xscale_reg_arch_type;
- arch_info[i] = xscale_reg_arch_info[i];
- arch_info[i].target = target;
- }
-
- xscale->reg_cache = (*cache_p);
- }
-
- int xscale_init_target(struct command_context_s *cmd_ctx, struct target_s *target)
- {
- if (startup_mode != DAEMON_RESET)
- {
- ERROR("XScale target requires a reset");
- ERROR("Reset target to enable debug");
- }
-
- return ERROR_OK;
- }
-
- int xscale_quit()
- {
-
- return ERROR_OK;
- }
-
- int xscale_init_arch_info(target_t *target, xscale_common_t *xscale, int chain_pos, char *variant)
- {
- armv4_5_common_t *armv4_5;
- u32 high_reset_branch, low_reset_branch;
- int i;
-
- armv4_5 = &xscale->armv4_5_common;
-
- /* store architecture specfic data (none so far) */
- xscale->arch_info = NULL;
- xscale->common_magic = XSCALE_COMMON_MAGIC;
-
- /* remember the variant (PXA25x, PXA27x, IXP42x, ...) */
- xscale->variant = strdup(variant);
-
- /* prepare JTAG information for the new target */
- xscale->jtag_info.chain_pos = chain_pos;
- jtag_register_event_callback(xscale_jtag_callback, target);
-
- xscale->jtag_info.dbgrx = 0x02;
- xscale->jtag_info.dbgtx = 0x10;
- xscale->jtag_info.dcsr = 0x09;
- xscale->jtag_info.ldic = 0x07;
-
- if ((strcmp(xscale->variant, "pxa250") == 0) ||
- (strcmp(xscale->variant, "pxa255") == 0) ||
- (strcmp(xscale->variant, "pxa26x") == 0))
- {
- xscale->jtag_info.ir_length = 5;
- }
- else if ((strcmp(xscale->variant, "pxa27x") == 0) ||
- (strcmp(xscale->variant, "ixp42x") == 0) ||
- (strcmp(xscale->variant, "ixp45x") == 0) ||
- (strcmp(xscale->variant, "ixp46x") == 0))
- {
- xscale->jtag_info.ir_length = 7;
- }
-
- /* the debug handler isn't installed (and thus not running) at this time */
- xscale->handler_installed = 0;
- xscale->handler_running = 0;
- xscale->handler_address = 0xfe000800;
-
- /* clear the vectors we keep locally for reference */
- memset(xscale->low_vectors, 0, sizeof(xscale->low_vectors));
- memset(xscale->high_vectors, 0, sizeof(xscale->high_vectors));
-
- /* no user-specified vectors have been configured yet */
- xscale->static_low_vectors_set = 0x0;
- xscale->static_high_vectors_set = 0x0;
-
- /* calculate branches to debug handler */
- low_reset_branch = (xscale->handler_address + 0x20 - 0x0 - 0x8) >> 2;
- high_reset_branch = (xscale->handler_address + 0x20 - 0xffff0000 - 0x8) >> 2;
-
- xscale->low_vectors[0] = ARMV4_5_B((low_reset_branch & 0xffffff), 0);
- xscale->high_vectors[0] = ARMV4_5_B((high_reset_branch & 0xffffff), 0);
-
- for (i = 1; i <= 7; i++)
- {
- xscale->low_vectors[i] = ARMV4_5_B(0xfffffe, 0);
- xscale->high_vectors[i] = ARMV4_5_B(0xfffffe, 0);
- }
-
- /* 64kB aligned region used for DCache cleaning */
- xscale->cache_clean_address = 0xfffe0000;
-
- xscale->hold_rst = 0;
- xscale->external_debug_break = 0;
-
- xscale->force_hw_bkpts = 1;
-
- xscale->ibcr_available = 2;
- xscale->ibcr0_used = 0;
- xscale->ibcr1_used = 0;
-
- xscale->dbr_available = 2;
- xscale->dbr0_used = 0;
- xscale->dbr1_used = 0;
-
- xscale->arm_bkpt = ARMV5_BKPT(0x0);
- xscale->thumb_bkpt = ARMV5_T_BKPT(0x0) & 0xffff;
-
- xscale->vector_catch = 0x1;
-
- xscale->trace_buffer_enabled = 0;
- xscale->trace_buffer_fill = 0;
-
- /* prepare ARMv4/5 specific information */
- armv4_5->arch_info = xscale;
- armv4_5->read_core_reg = xscale_read_core_reg;
- armv4_5->write_core_reg = xscale_write_core_reg;
- armv4_5->full_context = xscale_full_context;
-
- armv4_5_init_arch_info(target, armv4_5);
-
- xscale->armv4_5_mmu.armv4_5_cache.ctype = -1;
- xscale->armv4_5_mmu.get_ttb = xscale_get_ttb;
- xscale->armv4_5_mmu.read_memory = xscale_read_memory;
- xscale->armv4_5_mmu.write_memory = xscale_write_memory;
- xscale->armv4_5_mmu.disable_mmu_caches = xscale_disable_mmu_caches;
- xscale->armv4_5_mmu.enable_mmu_caches = xscale_enable_mmu_caches;
- xscale->armv4_5_mmu.has_tiny_pages = 1;
- xscale->armv4_5_mmu.mmu_enabled = 0;
-
- return ERROR_OK;
- }
-
- /* target xscale <endianess> <startup_mode> <chain_pos> <variant> */
- int xscale_target_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc, struct target_s *target)
- {
- int chain_pos;
- char *variant = NULL;
- xscale_common_t *xscale = malloc(sizeof(xscale_common_t));
-
- if (argc < 5)
- {
- ERROR("'target xscale' requires four arguments: <endianess> <startup_mode> <chain_pos> <variant>");
- exit(-1);
- }
-
- chain_pos = strtoul(args[3], NULL, 0);
-
- variant = args[4];
-
- xscale_init_arch_info(target, xscale, chain_pos, variant);
- xscale_build_reg_cache(target);
-
- return ERROR_OK;
- }
-
- int xscale_handle_debug_handler_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
- {
- target_t *target = NULL;
- armv4_5_common_t *armv4_5;
- xscale_common_t *xscale;
-
- u32 handler_address;
-
- if (argc < 2)
- {
- ERROR("'xscale debug_handler <target#> <address>' command takes two required operands");
- return ERROR_OK;
- }
-
- if ((target = get_target_by_num(strtoul(args[0], NULL, 0))) == NULL)
- {
- ERROR("no target '%s' configured", args[0]);
- return ERROR_OK;
- }
-
- if (xscale_get_arch_pointers(target, &armv4_5, &xscale) != ERROR_OK)
- {
- command_print(cmd_ctx, "target isn't an ARM920t target");
- return ERROR_OK;
- }
-
- handler_address = strtoul(args[1], NULL, 0);
-
- if (((handler_address >= 0x800) && (handler_address <= 0x1fef800)) ||
- ((handler_address >= 0xfe000800) && (handler_address <= 0xfffff800)))
- {
- xscale->handler_address = handler_address;
- }
- else
- {
- ERROR("xscale debug_handler <address> must be between 0x800 and 0x1fef800 or between 0xfe000800 and 0xfffff800");
- }
-
- return ERROR_OK;
- }
-
- int xscale_handle_cache_clean_address_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
- {
- target_t *target = NULL;
- armv4_5_common_t *armv4_5;
- xscale_common_t *xscale;
-
- u32 cache_clean_address;
-
- if (argc < 2)
- {
- ERROR("'xscale cache_clean_address <target#> <address>' command takes two required operands");
- return ERROR_OK;
- }
-
- if ((target = get_target_by_num(strtoul(args[0], NULL, 0))) == NULL)
- {
- ERROR("no target '%s' configured", args[0]);
- return ERROR_OK;
- }
-
- if (xscale_get_arch_pointers(target, &armv4_5, &xscale) != ERROR_OK)
- {
- command_print(cmd_ctx, "target isn't an XScale target");
- return ERROR_OK;
- }
-
- cache_clean_address = strtoul(args[1], NULL, 0);
-
- if (cache_clean_address & 0xffff)
- {
- ERROR("xscale cache_clean_address <address> must be 64kb aligned");
- }
- else
- {
- xscale->cache_clean_address = cache_clean_address;
- }
-
- return ERROR_OK;
- }
-
- int xscale_handle_cache_info_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
- {
- target_t *target = get_current_target(cmd_ctx);
- armv4_5_common_t *armv4_5;
- xscale_common_t *xscale;
-
- if (xscale_get_arch_pointers(target, &armv4_5, &xscale) != ERROR_OK)
- {
- command_print(cmd_ctx, "target isn't an XScale target");
- return ERROR_OK;
- }
-
- return armv4_5_handle_cache_info_command(cmd_ctx, &xscale->armv4_5_mmu.armv4_5_cache);
- }
-
- int xscale_handle_virt2phys_command(command_context_t *cmd_ctx, char *cmd, char **args, int argc)
- {
- target_t *target = get_current_target(cmd_ctx);
- armv4_5_common_t *armv4_5;
- xscale_common_t *xscale;
-
- if (xscale_get_arch_pointers(target, &armv4_5, &xscale) != ERROR_OK)
- {
- command_print(cmd_ctx, "target isn't an XScale target");
- return ERROR_OK;
- }
-
- if (target->state != TARGET_HALTED)
- {
- command_print(cmd_ctx, "target must be stopped for \"%s\" command", cmd);
- return ERROR_OK;
- }
-
- return armv4_5_mmu_handle_virt2phys_command(cmd_ctx, cmd, args, argc, target, &xscale->armv4_5_mmu);
- }
-
- int xscale_handle_mmu_command(command_context_t *cmd_ctx, char *cmd, char **args, int argc)
- {
- target_t *target = get_current_target(cmd_ctx);
- armv4_5_common_t *armv4_5;
- xscale_common_t *xscale;
-
- if (xscale_get_arch_pointers(target, &armv4_5, &xscale) != ERROR_OK)
- {
- command_print(cmd_ctx, "target isn't an XScale target");
- return ERROR_OK;
- }
-
- if (target->state != TARGET_HALTED)
- {
- command_print(cmd_ctx, "target must be stopped for \"%s\" command", cmd);
- return ERROR_OK;
- }
-
- if (argc >= 1)
- {
- if (strcmp("enable", args[0]) == 0)
- {
- xscale_enable_mmu_caches(target, 1, 0, 0);
- xscale->armv4_5_mmu.mmu_enabled = 1;
- }
- else if (strcmp("disable", args[0]) == 0)
- {
- xscale_disable_mmu_caches(target, 1, 0, 0);
- xscale->armv4_5_mmu.mmu_enabled = 0;
- }
- }
-
- command_print(cmd_ctx, "mmu %s", (xscale->armv4_5_mmu.mmu_enabled) ? "enabled" : "disabled");
-
- return ERROR_OK;
- }
-
- int xscale_handle_idcache_command(command_context_t *cmd_ctx, char *cmd, char **args, int argc)
- {
- target_t *target = get_current_target(cmd_ctx);
- armv4_5_common_t *armv4_5;
- xscale_common_t *xscale;
- int icache = 0, dcache = 0;
-
- if (xscale_get_arch_pointers(target, &armv4_5, &xscale) != ERROR_OK)
- {
- command_print(cmd_ctx, "target isn't an XScale target");
- return ERROR_OK;
- }
-
- if (target->state != TARGET_HALTED)
- {
- command_print(cmd_ctx, "target must be stopped for \"%s\" command", cmd);
- return ERROR_OK;
- }
-
- if (strcmp(cmd, "icache") == 0)
- icache = 1;
- else if (strcmp(cmd, "dcache") == 0)
- dcache = 1;
-
- if (argc >= 1)
- {
- if (strcmp("enable", args[0]) == 0)
- {
- xscale_enable_mmu_caches(target, 0, dcache, icache);
-
- if (icache)
- xscale->armv4_5_mmu.armv4_5_cache.i_cache_enabled = 1;
- else if (dcache)
- xscale->armv4_5_mmu.armv4_5_cache.d_u_cache_enabled = 1;
- }
- else if (strcmp("disable", args[0]) == 0)
- {
- xscale_disable_mmu_caches(target, 0, dcache, icache);
-
- if (icache)
- xscale->armv4_5_mmu.armv4_5_cache.i_cache_enabled = 0;
- else if (dcache)
- xscale->armv4_5_mmu.armv4_5_cache.d_u_cache_enabled = 0;
- }
- }
-
- if (icache)
- command_print(cmd_ctx, "icache %s", (xscale->armv4_5_mmu.armv4_5_cache.i_cache_enabled) ? "enabled" : "disabled");
-
- if (dcache)
- command_print(cmd_ctx, "dcache %s", (xscale->armv4_5_mmu.armv4_5_cache.d_u_cache_enabled) ? "enabled" : "disabled");
-
- return ERROR_OK;
- }
-
- int xscale_handle_vector_catch_command(command_context_t *cmd_ctx, char *cmd, char **args, int argc)
- {
- target_t *target = get_current_target(cmd_ctx);
- armv4_5_common_t *armv4_5;
- xscale_common_t *xscale;
-
- if (xscale_get_arch_pointers(target, &armv4_5, &xscale) != ERROR_OK)
- {
- command_print(cmd_ctx, "target isn't an XScale target");
- return ERROR_OK;
- }
-
- if (argc < 1)
- {
- command_print(cmd_ctx, "usage: xscale vector_catch [mask]");
- }
- else
- {
- xscale->vector_catch = strtoul(args[0], NULL, 0);
- buf_set_u32(xscale->reg_cache->reg_list[XSCALE_DCSR].value, 16, 8, xscale->vector_catch);
- xscale_write_dcsr(target, -1, -1);
- }
-
- command_print(cmd_ctx, "vector catch mask: 0x%2.2x", xscale->vector_catch);
-
- return ERROR_OK;
- }
-
- int xscale_handle_force_hw_bkpts_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
- {
- target_t *target = get_current_target(cmd_ctx);
- armv4_5_common_t *armv4_5;
- xscale_common_t *xscale;
-
- if (xscale_get_arch_pointers(target, &armv4_5, &xscale) != ERROR_OK)
- {
- command_print(cmd_ctx, "target isn't an XScale target");
- return ERROR_OK;
- }
-
- if ((argc >= 1) && (strcmp("enable", args[0]) == 0))
- {
- xscale->force_hw_bkpts = 1;
- }
- else if ((argc >= 1) && (strcmp("disable", args[0]) == 0))
- {
- xscale->force_hw_bkpts = 0;
- }
- else
- {
- command_print(cmd_ctx, "usage: xscale force_hw_bkpts <enable|disable>");
- }
-
- command_print(cmd_ctx, "force hardware breakpoints %s", (xscale->force_hw_bkpts) ? "enabled" : "disabled");
-
- return ERROR_OK;
- }
-
- int xscale_handle_trace_buffer_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
- {
- target_t *target = get_current_target(cmd_ctx);
- armv4_5_common_t *armv4_5;
- xscale_common_t *xscale;
- u32 dcsr_value;
-
- if (xscale_get_arch_pointers(target, &armv4_5, &xscale) != ERROR_OK)
- {
- command_print(cmd_ctx, "target isn't an XScale target");
- return ERROR_OK;
- }
-
- if (target->state != TARGET_HALTED)
- {
- command_print(cmd_ctx, "target must be stopped for \"%s\" command", cmd);
- return ERROR_OK;
- }
-
- if ((argc >= 1) && (strcmp("enable", args[0]) == 0))
- {
- xscale->trace_buffer_enabled = 1;
- }
- else if ((argc >= 1) && (strcmp("disable", args[0]) == 0))
- {
- xscale->trace_buffer_enabled = 0;
- }
-
- if ((argc >= 2) && (strcmp("fill", args[1]) == 0))
- {
- xscale->trace_buffer_fill = 1;
- }
- else if ((argc >= 2) && (strcmp("wrap", args[1]) == 0))
- {
- xscale->trace_buffer_fill = 0;
- }
-
- command_print(cmd_ctx, "trace buffer %s (%s)",
- (xscale->trace_buffer_enabled) ? "enabled" : "disabled",
- (xscale->trace_buffer_fill) ? "fill" : "wrap");
-
- dcsr_value = buf_get_u32(xscale->reg_cache->reg_list[XSCALE_DCSR].value, 0, 32);
- if (xscale->trace_buffer_fill)
- xscale_write_dcsr_sw(target, (dcsr_value & 0xfffffffc) | 2);
- else
- xscale_write_dcsr_sw(target, dcsr_value & 0xfffffffc);
-
- return ERROR_OK;
- }
-
- int xscale_handle_dump_trace_buffer_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
- {
- target_t *target = get_current_target(cmd_ctx);
- armv4_5_common_t *armv4_5;
- xscale_common_t *xscale;
- u32 trace_buffer[258];
- int is_address[256];
- int i;
-
- if (xscale_get_arch_pointers(target, &armv4_5, &xscale) != ERROR_OK)
- {
- command_print(cmd_ctx, "target isn't an XScale target");
- return ERROR_OK;
- }
-
- if (target->state != TARGET_HALTED)
- {
- command_print(cmd_ctx, "target must be stopped for \"%s\" command", cmd);
- return ERROR_OK;
- }
-
- /* send read trace buffer command (command 0x61) */
- xscale_send_u32(target, 0x61);
-
- /* receive trace buffer content */
- xscale_receive(target, trace_buffer, 258);
-
- for (i = 255; i >= 0; i--)
- {
- is_address[i] = 0;
- if (((trace_buffer[i] & 0xf0) == 0x90) ||
- ((trace_buffer[i] & 0xf0) == 0xd0))
- {
- if (i >= 4)
- is_address[--i] = 1;
- if (i >= 3)
- is_address[--i] = 1;
- if (i >= 2)
- is_address[--i] = 1;
- if (i >= 1)
- is_address[--i] = 1;
- }
- }
-
- for (i = 0; i < 256; i++)
- {
- #if 0
- command_print(cmd_ctx, "0x%2.2x 0x%2.2x 0x%2.2x 0x%2.2x 0x%2.2x 0x%2.2x 0x%2.2x 0x%2.2x",
- trace_buffer[i + 0], trace_buffer[i + 1], trace_buffer[i + 2], trace_buffer[i + 3],
- trace_buffer[i + 4], trace_buffer[i + 5], trace_buffer[i + 6], trace_buffer[i + 6]
- );
- i += 8;
- #endif
- if (is_address[i])
- {
- command_print(cmd_ctx, "address: 0x%2.2x%2.2x%2.2x%2.2x", trace_buffer[i], trace_buffer[i+1], trace_buffer[i+2], trace_buffer[i+3]);
- i += 3;
- }
- else
- {
- switch ((trace_buffer[i] & 0xf0) >> 4)
- {
- case 0:
- command_print(cmd_ctx, "0x%2.2x: reset exception", trace_buffer[i]);
- break;
- case 1:
- command_print(cmd_ctx, "0x%2.2x: undef exception", trace_buffer[i]);
- break;
- case 2:
- command_print(cmd_ctx, "0x%2.2x: swi exception", trace_buffer[i]);
- break;
- case 3:
- command_print(cmd_ctx, "0x%2.2x: pabort exception", trace_buffer[i]);
- break;
- case 4:
- command_print(cmd_ctx, "0x%2.2x: dabort exception", trace_buffer[i]);
- break;
- case 5:
- command_print(cmd_ctx, "0x%2.2x: invalid", trace_buffer[i]);
- break;
- case 6:
- command_print(cmd_ctx, "0x%2.2x: irq exception", trace_buffer[i]);
- break;
- case 7:
- command_print(cmd_ctx, "0x%2.2x: fiq exception", trace_buffer[i]);
- break;
- case 0x8:
- command_print(cmd_ctx, "0x%2.2x: direct branch", trace_buffer[i]);
- break;
- case 0x9:
- command_print(cmd_ctx, "0x%2.2x: indirect branch", trace_buffer[i]);
- break;
- case 0xa:
- command_print(cmd_ctx, "0x%2.2x: invalid", trace_buffer[i]);
- break;
- case 0xb:
- command_print(cmd_ctx, "0x%2.2x: invalid", trace_buffer[i]);
- break;
- case 0xc:
- command_print(cmd_ctx, "0x%2.2x: checkpointed direct branch", trace_buffer[i]);
- break;
- case 0xd:
- command_print(cmd_ctx, "0x%2.2x: checkpointed indirect branch", trace_buffer[i]);
- break;
- case 0xe:
- command_print(cmd_ctx, "0x%2.2x: invalid", trace_buffer[i]);
- break;
- case 0xf:
- command_print(cmd_ctx, "0x%2.2x: rollover", trace_buffer[i]);
- break;
- }
- }
- }
-
- command_print(cmd_ctx, "chkpt0: 0x%8.8x, chkpt1: 0x%8.8x", trace_buffer[256], trace_buffer[257]);
-
- return ERROR_OK;
- }
-
- int xscale_register_commands(struct command_context_s *cmd_ctx)
- {
- command_t *xscale_cmd;
-
- xscale_cmd = register_command(cmd_ctx, NULL, "xscale", NULL, COMMAND_ANY, "xscale specific commands");
-
- register_command(cmd_ctx, xscale_cmd, "debug_handler", xscale_handle_debug_handler_command, COMMAND_CONFIG, NULL);
- register_command(cmd_ctx, xscale_cmd, "cache_clean_address", xscale_handle_cache_clean_address_command, COMMAND_ANY, NULL);
-
- register_command(cmd_ctx, xscale_cmd, "cache_info", xscale_handle_cache_info_command, COMMAND_EXEC, NULL);
- register_command(cmd_ctx, xscale_cmd, "virt2phys", xscale_handle_virt2phys_command, COMMAND_EXEC, NULL);
- register_command(cmd_ctx, xscale_cmd, "mmu", xscale_handle_mmu_command, COMMAND_EXEC, "['enable'|'disable'] the MMU");
- register_command(cmd_ctx, xscale_cmd, "icache", xscale_handle_idcache_command, COMMAND_EXEC, "['enable'|'disable'] the ICache");
- register_command(cmd_ctx, xscale_cmd, "dcache", xscale_handle_idcache_command, COMMAND_EXEC, "['enable'|'disable'] the DCache");
-
- register_command(cmd_ctx, xscale_cmd, "vector_catch", xscale_handle_idcache_command, COMMAND_EXEC, "<mask> of vectors that should be catched");
-
- register_command(cmd_ctx, xscale_cmd, "trace_buffer", xscale_handle_trace_buffer_command, COMMAND_EXEC, "<enable|disable> ['fill'|'wrap']");
-
- register_command(cmd_ctx, xscale_cmd, "dump_trace_buffer", xscale_handle_dump_trace_buffer_command, COMMAND_EXEC, "dump content of trace buffer");
-
- armv4_5_register_commands(cmd_ctx);
-
- return ERROR_OK;
- }
|