|
- /***************************************************************************
- * Copyright (C) 2007 by Dominic Rath *
- * Dominic.Rath@gmx.de *
- * *
- * Copyright (C) 2007,2008,2009 by Øyvind Harboe *
- * oyvind.harboe@zylin.com *
- * *
- * This program is free software; you can redistribute it and/or modify *
- * it under the terms of the GNU General Public License as published by *
- * the Free Software Foundation; either version 2 of the License, or *
- * (at your option) any later version. *
- * *
- * This program is distributed in the hope that it will be useful, *
- * but WITHOUT ANY WARRANTY; without even the implied warranty of *
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
- * GNU General Public License for more details. *
- * *
- * You should have received a copy of the GNU General Public License *
- * along with this program; if not, write to the *
- * Free Software Foundation, Inc., *
- * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
- ***************************************************************************/
- #ifdef HAVE_CONFIG_H
- #include "config.h"
- #endif
-
- #include "arm926ejs.h"
- #include "time_support.h"
- #include "target_type.h"
-
-
- /*
- * The ARM926 is built around the ARM9EJ-S core, and most JTAG docs
- * are in the ARM9EJ-S Technical Reference Manual (ARM DDI 0222B) not
- * the ARM926 manual (ARM DDI 0198E). The scan chains are:
- *
- * 1 ... core debugging
- * 2 ... EmbeddedICE
- * 3 ... external boundary scan (SoC-specific, unused here)
- * 6 ... ETM
- * 15 ... coprocessor 15
- */
-
- #if 0
- #define _DEBUG_INSTRUCTION_EXECUTION_
- #endif
-
- #define ARM926EJS_CP15_ADDR(opcode_1, opcode_2, CRn, CRm) ((opcode_1 << 11) | (opcode_2 << 8) | (CRn << 4) | (CRm << 0))
-
- static int arm926ejs_cp15_read(target_t *target, uint32_t op1, uint32_t op2,
- uint32_t CRn, uint32_t CRm, uint32_t *value)
- {
- int retval = ERROR_OK;
- struct arm7_9_common_s *arm7_9 = target_to_arm7_9(target);
- arm_jtag_t *jtag_info = &arm7_9->jtag_info;
- uint32_t address = ARM926EJS_CP15_ADDR(op1, op2, CRn, CRm);
- struct scan_field fields[4];
- uint8_t address_buf[2];
- uint8_t nr_w_buf = 0;
- uint8_t access = 1;
-
- buf_set_u32(address_buf, 0, 14, address);
-
- jtag_set_end_state(TAP_IDLE);
- if ((retval = arm_jtag_scann(jtag_info, 0xf)) != ERROR_OK)
- {
- return retval;
- }
- arm_jtag_set_instr(jtag_info, jtag_info->intest_instr, NULL);
-
- fields[0].tap = jtag_info->tap;
- fields[0].num_bits = 32;
- fields[0].out_value = NULL;
- fields[0].in_value = (uint8_t *)value;
-
-
- fields[1].tap = jtag_info->tap;
- fields[1].num_bits = 1;
- fields[1].out_value = &access;
- fields[1].in_value = &access;
-
- fields[2].tap = jtag_info->tap;
- fields[2].num_bits = 14;
- fields[2].out_value = address_buf;
- fields[2].in_value = NULL;
-
- fields[3].tap = jtag_info->tap;
- fields[3].num_bits = 1;
- fields[3].out_value = &nr_w_buf;
- fields[3].in_value = NULL;
-
- jtag_add_dr_scan(4, fields, jtag_get_end_state());
-
- long long then = timeval_ms();
-
- for (;;)
- {
- /* rescan with NOP, to wait for the access to complete */
- access = 0;
- nr_w_buf = 0;
- jtag_add_dr_scan(4, fields, jtag_get_end_state());
-
- jtag_add_callback(arm_le_to_h_u32, (jtag_callback_data_t)value);
-
- if ((retval = jtag_execute_queue()) != ERROR_OK)
- {
- return retval;
- }
-
- if (buf_get_u32(&access, 0, 1) == 1)
- {
- break;
- }
-
- /* 10ms timeout */
- if ((timeval_ms()-then)>10)
- {
- LOG_ERROR("cp15 read operation timed out");
- return ERROR_FAIL;
- }
- }
-
- #ifdef _DEBUG_INSTRUCTION_EXECUTION_
- LOG_DEBUG("addr: 0x%x value: %8.8x", address, *value);
- #endif
-
- arm_jtag_set_instr(jtag_info, 0xc, NULL);
-
- return ERROR_OK;
- }
-
- static int arm926ejs_mrc(target_t *target, int cpnum, uint32_t op1,
- uint32_t op2, uint32_t CRn, uint32_t CRm, uint32_t *value)
- {
- if (cpnum != 15) {
- LOG_ERROR("Only cp15 is supported");
- return ERROR_FAIL;
- }
- return arm926ejs_cp15_read(target, op1, op2, CRn, CRm, value);
- }
-
- static int arm926ejs_cp15_write(target_t *target, uint32_t op1, uint32_t op2,
- uint32_t CRn, uint32_t CRm, uint32_t value)
- {
- int retval = ERROR_OK;
- struct arm7_9_common_s *arm7_9 = target_to_arm7_9(target);
- arm_jtag_t *jtag_info = &arm7_9->jtag_info;
- uint32_t address = ARM926EJS_CP15_ADDR(op1, op2, CRn, CRm);
- struct scan_field fields[4];
- uint8_t value_buf[4];
- uint8_t address_buf[2];
- uint8_t nr_w_buf = 1;
- uint8_t access = 1;
-
- buf_set_u32(address_buf, 0, 14, address);
- buf_set_u32(value_buf, 0, 32, value);
-
- jtag_set_end_state(TAP_IDLE);
- if ((retval = arm_jtag_scann(jtag_info, 0xf)) != ERROR_OK)
- {
- return retval;
- }
- arm_jtag_set_instr(jtag_info, jtag_info->intest_instr, NULL);
-
- fields[0].tap = jtag_info->tap;
- fields[0].num_bits = 32;
- fields[0].out_value = value_buf;
- fields[0].in_value = NULL;
-
- fields[1].tap = jtag_info->tap;
- fields[1].num_bits = 1;
- fields[1].out_value = &access;
- fields[1].in_value = &access;
-
- fields[2].tap = jtag_info->tap;
- fields[2].num_bits = 14;
- fields[2].out_value = address_buf;
- fields[2].in_value = NULL;
-
- fields[3].tap = jtag_info->tap;
- fields[3].num_bits = 1;
- fields[3].out_value = &nr_w_buf;
- fields[3].in_value = NULL;
-
- jtag_add_dr_scan(4, fields, jtag_get_end_state());
-
- long long then = timeval_ms();
-
- for (;;)
- {
- /* rescan with NOP, to wait for the access to complete */
- access = 0;
- nr_w_buf = 0;
- jtag_add_dr_scan(4, fields, jtag_get_end_state());
- if ((retval = jtag_execute_queue()) != ERROR_OK)
- {
- return retval;
- }
-
- if (buf_get_u32(&access, 0, 1) == 1)
- {
- break;
- }
-
- /* 10ms timeout */
- if ((timeval_ms()-then)>10)
- {
- LOG_ERROR("cp15 write operation timed out");
- return ERROR_FAIL;
- }
- }
-
- #ifdef _DEBUG_INSTRUCTION_EXECUTION_
- LOG_DEBUG("addr: 0x%x value: %8.8x", address, value);
- #endif
-
- arm_jtag_set_instr(jtag_info, 0xf, NULL);
-
- return ERROR_OK;
- }
-
- static int arm926ejs_mcr(target_t *target, int cpnum, uint32_t op1,
- uint32_t op2, uint32_t CRn, uint32_t CRm, uint32_t value)
- {
- if (cpnum != 15) {
- LOG_ERROR("Only cp15 is supported");
- return ERROR_FAIL;
- }
- return arm926ejs_cp15_write(target, op1, op2, CRn, CRm, value);
- }
-
- static int arm926ejs_examine_debug_reason(target_t *target)
- {
- struct arm7_9_common_s *arm7_9 = target_to_arm7_9(target);
- reg_t *dbg_stat = &arm7_9->eice_cache->reg_list[EICE_DBG_STAT];
- int debug_reason;
- int retval;
-
- embeddedice_read_reg(dbg_stat);
- if ((retval = jtag_execute_queue()) != ERROR_OK)
- return retval;
-
- /* Method-Of-Entry (MOE) field */
- debug_reason = buf_get_u32(dbg_stat->value, 6, 4);
-
- switch (debug_reason)
- {
- case 0:
- LOG_DEBUG("no *NEW* debug entry (?missed one?)");
- /* ... since last restart or debug reset ... */
- target->debug_reason = DBG_REASON_DBGRQ;
- break;
- case 1:
- LOG_DEBUG("breakpoint from EICE unit 0");
- target->debug_reason = DBG_REASON_BREAKPOINT;
- break;
- case 2:
- LOG_DEBUG("breakpoint from EICE unit 1");
- target->debug_reason = DBG_REASON_BREAKPOINT;
- break;
- case 3:
- LOG_DEBUG("soft breakpoint (BKPT instruction)");
- target->debug_reason = DBG_REASON_BREAKPOINT;
- break;
- case 4:
- LOG_DEBUG("vector catch breakpoint");
- target->debug_reason = DBG_REASON_BREAKPOINT;
- break;
- case 5:
- LOG_DEBUG("external breakpoint");
- target->debug_reason = DBG_REASON_BREAKPOINT;
- break;
- case 6:
- LOG_DEBUG("watchpoint from EICE unit 0");
- target->debug_reason = DBG_REASON_WATCHPOINT;
- break;
- case 7:
- LOG_DEBUG("watchpoint from EICE unit 1");
- target->debug_reason = DBG_REASON_WATCHPOINT;
- break;
- case 8:
- LOG_DEBUG("external watchpoint");
- target->debug_reason = DBG_REASON_WATCHPOINT;
- break;
- case 9:
- LOG_DEBUG("internal debug request");
- target->debug_reason = DBG_REASON_DBGRQ;
- break;
- case 10:
- LOG_DEBUG("external debug request");
- target->debug_reason = DBG_REASON_DBGRQ;
- break;
- case 11:
- LOG_DEBUG("debug re-entry from system speed access");
- /* This is normal when connecting to something that's
- * already halted, or in some related code paths, but
- * otherwise is surprising (and presumably wrong).
- */
- switch (target->debug_reason) {
- case DBG_REASON_DBGRQ:
- break;
- default:
- LOG_ERROR("unexpected -- debug re-entry");
- /* FALLTHROUGH */
- case DBG_REASON_UNDEFINED:
- target->debug_reason = DBG_REASON_DBGRQ;
- break;
- }
- break;
- case 12:
- /* FIX!!!! here be dragons!!! We need to fail here so
- * the target will interpreted as halted but we won't
- * try to talk to it right now... a resume + halt seems
- * to sync things up again. Please send an email to
- * openocd development mailing list if you have hardware
- * to donate to look into this problem....
- */
- LOG_WARNING("WARNING: mystery debug reason MOE = 0xc. Try issuing a resume + halt.");
- target->debug_reason = DBG_REASON_DBGRQ;
- break;
- default:
- LOG_WARNING("WARNING: unknown debug reason: 0x%x", debug_reason);
- /* Oh agony! should we interpret this as a halt request or
- * that the target stopped on it's own accord?
- */
- target->debug_reason = DBG_REASON_DBGRQ;
- /* if we fail here, we won't talk to the target and it will
- * be reported to be in the halted state */
- break;
- }
-
- return ERROR_OK;
- }
-
- static uint32_t arm926ejs_get_ttb(target_t *target)
- {
- struct arm926ejs_common_s *arm926ejs = target_to_arm926(target);
- int retval;
- uint32_t ttb = 0x0;
-
- if ((retval = arm926ejs->read_cp15(target, 0, 0, 2, 0, &ttb)) != ERROR_OK)
- return retval;
-
- return ttb;
- }
-
- static void arm926ejs_disable_mmu_caches(target_t *target, int mmu,
- int d_u_cache, int i_cache)
- {
- struct arm926ejs_common_s *arm926ejs = target_to_arm926(target);
- uint32_t cp15_control;
-
- /* read cp15 control register */
- arm926ejs->read_cp15(target, 0, 0, 1, 0, &cp15_control);
- jtag_execute_queue();
-
- if (mmu)
- {
- /* invalidate TLB */
- arm926ejs->write_cp15(target, 0, 0, 8, 7, 0x0);
-
- cp15_control &= ~0x1U;
- }
-
- if (d_u_cache)
- {
- uint32_t debug_override;
- /* read-modify-write CP15 debug override register
- * to enable "test and clean all" */
- arm926ejs->read_cp15(target, 0, 0, 15, 0, &debug_override);
- debug_override |= 0x80000;
- arm926ejs->write_cp15(target, 0, 0, 15, 0, debug_override);
-
- /* clean and invalidate DCache */
- arm926ejs->write_cp15(target, 0, 0, 7, 5, 0x0);
-
- /* write CP15 debug override register
- * to disable "test and clean all" */
- debug_override &= ~0x80000;
- arm926ejs->write_cp15(target, 0, 0, 15, 0, debug_override);
-
- cp15_control &= ~0x4U;
- }
-
- if (i_cache)
- {
- /* invalidate ICache */
- arm926ejs->write_cp15(target, 0, 0, 7, 5, 0x0);
-
- cp15_control &= ~0x1000U;
- }
-
- arm926ejs->write_cp15(target, 0, 0, 1, 0, cp15_control);
- }
-
- static void arm926ejs_enable_mmu_caches(target_t *target, int mmu,
- int d_u_cache, int i_cache)
- {
- struct arm926ejs_common_s *arm926ejs = target_to_arm926(target);
- uint32_t cp15_control;
-
- /* read cp15 control register */
- arm926ejs->read_cp15(target, 0, 0, 1, 0, &cp15_control);
- jtag_execute_queue();
-
- if (mmu)
- cp15_control |= 0x1U;
-
- if (d_u_cache)
- cp15_control |= 0x4U;
-
- if (i_cache)
- cp15_control |= 0x1000U;
-
- arm926ejs->write_cp15(target, 0, 0, 1, 0, cp15_control);
- }
-
- static void arm926ejs_post_debug_entry(target_t *target)
- {
- struct arm926ejs_common_s *arm926ejs = target_to_arm926(target);
-
- /* examine cp15 control reg */
- arm926ejs->read_cp15(target, 0, 0, 1, 0, &arm926ejs->cp15_control_reg);
- jtag_execute_queue();
- LOG_DEBUG("cp15_control_reg: %8.8" PRIx32 "", arm926ejs->cp15_control_reg);
-
- if (arm926ejs->armv4_5_mmu.armv4_5_cache.ctype == -1)
- {
- uint32_t cache_type_reg;
- /* identify caches */
- arm926ejs->read_cp15(target, 0, 1, 0, 0, &cache_type_reg);
- jtag_execute_queue();
- armv4_5_identify_cache(cache_type_reg, &arm926ejs->armv4_5_mmu.armv4_5_cache);
- }
-
- arm926ejs->armv4_5_mmu.mmu_enabled = (arm926ejs->cp15_control_reg & 0x1U) ? 1 : 0;
- arm926ejs->armv4_5_mmu.armv4_5_cache.d_u_cache_enabled = (arm926ejs->cp15_control_reg & 0x4U) ? 1 : 0;
- arm926ejs->armv4_5_mmu.armv4_5_cache.i_cache_enabled = (arm926ejs->cp15_control_reg & 0x1000U) ? 1 : 0;
-
- /* save i/d fault status and address register */
- arm926ejs->read_cp15(target, 0, 0, 5, 0, &arm926ejs->d_fsr);
- arm926ejs->read_cp15(target, 0, 1, 5, 0, &arm926ejs->i_fsr);
- arm926ejs->read_cp15(target, 0, 0, 6, 0, &arm926ejs->d_far);
-
- LOG_DEBUG("D FSR: 0x%8.8" PRIx32 ", D FAR: 0x%8.8" PRIx32 ", I FSR: 0x%8.8" PRIx32 "",
- arm926ejs->d_fsr, arm926ejs->d_far, arm926ejs->i_fsr);
-
- uint32_t cache_dbg_ctrl;
-
- /* read-modify-write CP15 cache debug control register
- * to disable I/D-cache linefills and force WT */
- arm926ejs->read_cp15(target, 7, 0, 15, 0, &cache_dbg_ctrl);
- cache_dbg_ctrl |= 0x7;
- arm926ejs->write_cp15(target, 7, 0, 15, 0, cache_dbg_ctrl);
- }
-
- static void arm926ejs_pre_restore_context(target_t *target)
- {
- struct arm926ejs_common_s *arm926ejs = target_to_arm926(target);
-
- /* restore i/d fault status and address register */
- arm926ejs->write_cp15(target, 0, 0, 5, 0, arm926ejs->d_fsr);
- arm926ejs->write_cp15(target, 0, 1, 5, 0, arm926ejs->i_fsr);
- arm926ejs->write_cp15(target, 0, 0, 6, 0, arm926ejs->d_far);
-
- uint32_t cache_dbg_ctrl;
-
- /* read-modify-write CP15 cache debug control register
- * to reenable I/D-cache linefills and disable WT */
- arm926ejs->read_cp15(target, 7, 0, 15, 0, &cache_dbg_ctrl);
- cache_dbg_ctrl &= ~0x7;
- arm926ejs->write_cp15(target, 7, 0, 15, 0, cache_dbg_ctrl);
- }
-
- static const char arm926_not[] = "target is not an ARM926";
-
- static int arm926ejs_verify_pointer(struct command_context_s *cmd_ctx,
- struct arm926ejs_common_s *arm926)
- {
- if (arm926->common_magic != ARM926EJS_COMMON_MAGIC) {
- command_print(cmd_ctx, arm926_not);
- return ERROR_TARGET_INVALID;
- }
- return ERROR_OK;
- }
-
- /** Logs summary of ARM926 state for a halted target. */
- int arm926ejs_arch_state(struct target_s *target)
- {
- static const char *state[] =
- {
- "disabled", "enabled"
- };
-
- struct arm926ejs_common_s *arm926ejs = target_to_arm926(target);
- struct armv4_5_common_s *armv4_5;
-
- if (arm926ejs->common_magic != ARM926EJS_COMMON_MAGIC)
- {
- LOG_ERROR("BUG: %s", arm926_not);
- return ERROR_TARGET_INVALID;
- }
-
- armv4_5 = &arm926ejs->arm9tdmi_common.arm7_9_common.armv4_5_common;
-
- LOG_USER("target halted in %s state due to %s, current mode: %s\n"
- "cpsr: 0x%8.8" PRIx32 " pc: 0x%8.8" PRIx32 "\n"
- "MMU: %s, D-Cache: %s, I-Cache: %s",
- armv4_5_state_strings[armv4_5->core_state],
- Jim_Nvp_value2name_simple(nvp_target_debug_reason,target->debug_reason)->name,
- 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[arm926ejs->armv4_5_mmu.mmu_enabled],
- state[arm926ejs->armv4_5_mmu.armv4_5_cache.d_u_cache_enabled],
- state[arm926ejs->armv4_5_mmu.armv4_5_cache.i_cache_enabled]);
-
- return ERROR_OK;
- }
-
- int arm926ejs_soft_reset_halt(struct target_s *target)
- {
- int retval = ERROR_OK;
- struct arm926ejs_common_s *arm926ejs = target_to_arm926(target);
- struct arm7_9_common_s *arm7_9 = target_to_arm7_9(target);
- struct armv4_5_common_s *armv4_5 = &arm7_9->armv4_5_common;
- reg_t *dbg_stat = &arm7_9->eice_cache->reg_list[EICE_DBG_STAT];
-
- if ((retval = target_halt(target)) != ERROR_OK)
- {
- return retval;
- }
-
- long long then = timeval_ms();
- int timeout;
- while (!(timeout = ((timeval_ms()-then) > 1000)))
- {
- if (buf_get_u32(dbg_stat->value, EICE_DBG_STATUS_DBGACK, 1) == 0)
- {
- embeddedice_read_reg(dbg_stat);
- if ((retval = jtag_execute_queue()) != ERROR_OK)
- {
- return retval;
- }
- } else
- {
- break;
- }
- if (debug_level >= 1)
- {
- /* do not eat all CPU, time out after 1 se*/
- alive_sleep(100);
- } else
- {
- keep_alive();
- }
- }
- if (timeout)
- {
- LOG_ERROR("Failed to halt CPU after 1 sec");
- return ERROR_TARGET_TIMEOUT;
- }
-
- target->state = TARGET_HALTED;
-
- /* SVC, ARM state, IRQ and FIQ disabled */
- buf_set_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 8, 0xd3);
- armv4_5->core_cache->reg_list[ARMV4_5_CPSR].dirty = 1;
- armv4_5->core_cache->reg_list[ARMV4_5_CPSR].valid = 1;
-
- /* start fetching from 0x0 */
- buf_set_u32(armv4_5->core_cache->reg_list[15].value, 0, 32, 0x0);
- armv4_5->core_cache->reg_list[15].dirty = 1;
- armv4_5->core_cache->reg_list[15].valid = 1;
-
- armv4_5->core_mode = ARMV4_5_MODE_SVC;
- armv4_5->core_state = ARMV4_5_STATE_ARM;
-
- arm926ejs_disable_mmu_caches(target, 1, 1, 1);
- arm926ejs->armv4_5_mmu.mmu_enabled = 0;
- arm926ejs->armv4_5_mmu.armv4_5_cache.d_u_cache_enabled = 0;
- arm926ejs->armv4_5_mmu.armv4_5_cache.i_cache_enabled = 0;
-
- return target_call_event_callbacks(target, TARGET_EVENT_HALTED);
- }
-
- /** Writes a buffer, in the specified word size, with current MMU settings. */
- int arm926ejs_write_memory(struct target_s *target, uint32_t address,
- uint32_t size, uint32_t count, uint8_t *buffer)
- {
- int retval;
- struct arm926ejs_common_s *arm926ejs = target_to_arm926(target);
-
- /* FIX!!!! this should be cleaned up and made much more general. The
- * plan is to write up and test on arm926ejs specifically and
- * then generalize and clean up afterwards. */
- if (arm926ejs->armv4_5_mmu.mmu_enabled && (count == 1) && ((size==2) || (size==4)))
- {
- /* special case the handling of single word writes to bypass MMU
- * to allow implementation of breakpoints in memory marked read only
- * by MMU */
- if (arm926ejs->armv4_5_mmu.armv4_5_cache.d_u_cache_enabled)
- {
- /* flush and invalidate data cache
- *
- * MCR p15,0,p,c7,c10,1 - clean cache line using virtual address
- *
- */
- retval = arm926ejs->write_cp15(target, 0, 1, 7, 10, address&~0x3);
- if (retval != ERROR_OK)
- return retval;
- }
-
- uint32_t pa;
- retval = target->type->virt2phys(target, address, &pa);
- if (retval != ERROR_OK)
- return retval;
-
- /* write directly to physical memory bypassing any read only MMU bits, etc. */
- retval = armv4_5_mmu_write_physical(target, &arm926ejs->armv4_5_mmu, pa, size, count, buffer);
- if (retval != ERROR_OK)
- return retval;
- } else
- {
- if ((retval = arm7_9_write_memory(target, address, size, count, buffer)) != ERROR_OK)
- return retval;
- }
-
- /* If ICache is enabled, we have to invalidate affected ICache lines
- * the DCache is forced to write-through, so we don't have to clean it here
- */
- if (arm926ejs->armv4_5_mmu.armv4_5_cache.i_cache_enabled)
- {
- if (count <= 1)
- {
- /* invalidate ICache single entry with MVA */
- arm926ejs->write_cp15(target, 0, 1, 7, 5, address);
- }
- else
- {
- /* invalidate ICache */
- arm926ejs->write_cp15(target, 0, 0, 7, 5, address);
- }
- }
-
- return retval;
- }
-
- static int arm926ejs_write_phys_memory(struct target_s *target,
- uint32_t address, uint32_t size,
- uint32_t count, uint8_t *buffer)
- {
- struct arm926ejs_common_s *arm926ejs = target_to_arm926(target);
-
- return armv4_5_mmu_write_physical(target, &arm926ejs->armv4_5_mmu,
- address, size, count, buffer);
- }
-
- static int arm926ejs_read_phys_memory(struct target_s *target,
- uint32_t address, uint32_t size,
- uint32_t count, uint8_t *buffer)
- {
- struct arm926ejs_common_s *arm926ejs = target_to_arm926(target);
-
- return armv4_5_mmu_read_physical(target, &arm926ejs->armv4_5_mmu,
- address, size, count, buffer);
- }
-
- int arm926ejs_init_arch_info(target_t *target, arm926ejs_common_t *arm926ejs,
- struct jtag_tap *tap)
- {
- arm9tdmi_common_t *arm9tdmi = &arm926ejs->arm9tdmi_common;
- arm7_9_common_t *arm7_9 = &arm9tdmi->arm7_9_common;
-
- /* initialize arm9tdmi specific info (including arm7_9 and armv4_5)
- */
- arm9tdmi_init_arch_info(target, arm9tdmi, tap);
-
- arm926ejs->common_magic = ARM926EJS_COMMON_MAGIC;
-
- arm7_9->post_debug_entry = arm926ejs_post_debug_entry;
- arm7_9->pre_restore_context = arm926ejs_pre_restore_context;
-
- arm926ejs->read_cp15 = arm926ejs_cp15_read;
- arm926ejs->write_cp15 = arm926ejs_cp15_write;
- arm926ejs->armv4_5_mmu.armv4_5_cache.ctype = -1;
- arm926ejs->armv4_5_mmu.get_ttb = arm926ejs_get_ttb;
- arm926ejs->armv4_5_mmu.read_memory = arm7_9_read_memory;
- arm926ejs->armv4_5_mmu.write_memory = arm7_9_write_memory;
- arm926ejs->armv4_5_mmu.disable_mmu_caches = arm926ejs_disable_mmu_caches;
- arm926ejs->armv4_5_mmu.enable_mmu_caches = arm926ejs_enable_mmu_caches;
- arm926ejs->armv4_5_mmu.has_tiny_pages = 1;
- arm926ejs->armv4_5_mmu.mmu_enabled = 0;
-
- arm7_9->examine_debug_reason = arm926ejs_examine_debug_reason;
-
- /* The ARM926EJ-S implements the ARMv5TE architecture which
- * has the BKPT instruction, so we don't have to use a watchpoint comparator
- */
- arm7_9->arm_bkpt = ARMV5_BKPT(0x0);
- arm7_9->thumb_bkpt = ARMV5_T_BKPT(0x0) & 0xffff;
-
- return ERROR_OK;
- }
-
- static int arm926ejs_target_create(struct target_s *target, Jim_Interp *interp)
- {
- arm926ejs_common_t *arm926ejs = calloc(1,sizeof(arm926ejs_common_t));
-
- /* ARM9EJ-S core always reports 0x1 in Capture-IR */
- target->tap->ir_capture_mask = 0x0f;
-
- return arm926ejs_init_arch_info(target, arm926ejs, target->tap);
- }
-
- COMMAND_HANDLER(arm926ejs_handle_cp15_command)
- {
- int retval;
- target_t *target = get_current_target(cmd_ctx);
- struct arm926ejs_common_s *arm926ejs = target_to_arm926(target);
- int opcode_1;
- int opcode_2;
- int CRn;
- int CRm;
-
- if ((argc < 4) || (argc > 5))
- {
- command_print(cmd_ctx, "usage: arm926ejs cp15 <opcode_1> <opcode_2> <CRn> <CRm> [value]");
- return ERROR_OK;
- }
-
- COMMAND_PARSE_NUMBER(int, args[0], opcode_1);
- COMMAND_PARSE_NUMBER(int, args[1], opcode_2);
- COMMAND_PARSE_NUMBER(int, args[2], CRn);
- COMMAND_PARSE_NUMBER(int, args[3], CRm);
-
- retval = arm926ejs_verify_pointer(cmd_ctx, arm926ejs);
- if (retval != ERROR_OK)
- return retval;
-
- if (target->state != TARGET_HALTED)
- {
- command_print(cmd_ctx, "target must be stopped for \"%s\" command", CMD_NAME);
- return ERROR_OK;
- }
-
- if (argc == 4)
- {
- uint32_t value;
- if ((retval = arm926ejs->read_cp15(target, opcode_1, opcode_2, CRn, CRm, &value)) != ERROR_OK)
- {
- command_print(cmd_ctx, "couldn't access register");
- return ERROR_OK;
- }
- if ((retval = jtag_execute_queue()) != ERROR_OK)
- {
- return retval;
- }
-
- command_print(cmd_ctx, "%i %i %i %i: %8.8" PRIx32 "", opcode_1, opcode_2, CRn, CRm, value);
- }
- else
- {
- uint32_t value;
- COMMAND_PARSE_NUMBER(u32, args[4], value);
- if ((retval = arm926ejs->write_cp15(target, opcode_1, opcode_2, CRn, CRm, value)) != ERROR_OK)
- {
- command_print(cmd_ctx, "couldn't access register");
- return ERROR_OK;
- }
- command_print(cmd_ctx, "%i %i %i %i: %8.8" PRIx32 "", opcode_1, opcode_2, CRn, CRm, value);
- }
-
- return ERROR_OK;
- }
-
- COMMAND_HANDLER(arm926ejs_handle_cache_info_command)
- {
- int retval;
- target_t *target = get_current_target(cmd_ctx);
- struct arm926ejs_common_s *arm926ejs = target_to_arm926(target);
-
- retval = arm926ejs_verify_pointer(cmd_ctx, arm926ejs);
- if (retval != ERROR_OK)
- return retval;
-
- return armv4_5_handle_cache_info_command(cmd_ctx, &arm926ejs->armv4_5_mmu.armv4_5_cache);
- }
-
- static int arm926ejs_virt2phys(struct target_s *target, uint32_t virtual, uint32_t *physical)
- {
- int type;
- uint32_t cb;
- int domain;
- uint32_t ap;
- struct arm926ejs_common_s *arm926ejs = target_to_arm926(target);
-
- uint32_t ret = armv4_5_mmu_translate_va(target, &arm926ejs->armv4_5_mmu, virtual, &type, &cb, &domain, &ap);
- if (type == -1)
- {
- return ret;
- }
- *physical = ret;
- return ERROR_OK;
- }
-
- static int arm926ejs_mmu(struct target_s *target, int *enabled)
- {
- struct arm926ejs_common_s *arm926ejs = target_to_arm926(target);
-
- if (target->state != TARGET_HALTED)
- {
- LOG_ERROR("Target not halted");
- return ERROR_TARGET_INVALID;
- }
- *enabled = arm926ejs->armv4_5_mmu.mmu_enabled;
- return ERROR_OK;
- }
-
- /** Registers commands to access coprocessor, cache, and debug resources. */
- int arm926ejs_register_commands(struct command_context_s *cmd_ctx)
- {
- int retval;
- command_t *arm926ejs_cmd;
-
- retval = arm9tdmi_register_commands(cmd_ctx);
-
- arm926ejs_cmd = register_command(cmd_ctx, NULL, "arm926ejs",
- NULL, COMMAND_ANY,
- "arm926ejs specific commands");
-
- register_command(cmd_ctx, arm926ejs_cmd, "cp15",
- arm926ejs_handle_cp15_command, COMMAND_EXEC,
- "display/modify cp15 register "
- "<opcode_1> <opcode_2> <CRn> <CRm> [value]");
-
- register_command(cmd_ctx, arm926ejs_cmd, "cache_info",
- arm926ejs_handle_cache_info_command, COMMAND_EXEC,
- "display information about target caches");
-
- return retval;
- }
-
- /** Holds methods for ARM926 targets. */
- target_type_t arm926ejs_target =
- {
- .name = "arm926ejs",
-
- .poll = arm7_9_poll,
- .arch_state = arm926ejs_arch_state,
-
- .target_request_data = arm7_9_target_request_data,
-
- .halt = arm7_9_halt,
- .resume = arm7_9_resume,
- .step = arm7_9_step,
-
- .assert_reset = arm7_9_assert_reset,
- .deassert_reset = arm7_9_deassert_reset,
- .soft_reset_halt = arm926ejs_soft_reset_halt,
-
- .get_gdb_reg_list = armv4_5_get_gdb_reg_list,
-
- .read_memory = arm7_9_read_memory,
- .write_memory = arm926ejs_write_memory,
- .bulk_write_memory = arm7_9_bulk_write_memory,
- .checksum_memory = arm7_9_checksum_memory,
- .blank_check_memory = arm7_9_blank_check_memory,
-
- .run_algorithm = armv4_5_run_algorithm,
-
- .add_breakpoint = arm7_9_add_breakpoint,
- .remove_breakpoint = arm7_9_remove_breakpoint,
- .add_watchpoint = arm7_9_add_watchpoint,
- .remove_watchpoint = arm7_9_remove_watchpoint,
-
- .register_commands = arm926ejs_register_commands,
- .target_create = arm926ejs_target_create,
- .init_target = arm9tdmi_init_target,
- .examine = arm9tdmi_examine,
- .virt2phys = arm926ejs_virt2phys,
- .mmu = arm926ejs_mmu,
-
- .read_phys_memory = arm926ejs_read_phys_memory,
- .write_phys_memory = arm926ejs_write_phys_memory,
- .mrc = arm926ejs_mrc,
- .mcr = arm926ejs_mcr,
- };
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