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- /***************************************************************************
- * Copyright (C) 2009 by Paulius Zaleckas *
- * paulius.zaleckas@gmail.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. *
- ***************************************************************************/
-
- /*
- * FA526 is very similar to ARM920T with following differences:
- *
- * - execution pipeline is 6 steps
- * - Unified TLB
- * - has Branch Target Buffer
- * - does not support reading of I/D cache contents
- */
-
- #ifdef HAVE_CONFIG_H
- #include "config.h"
- #endif
-
- #include "arm920t.h"
- #include "target_type.h"
-
- static void fa526_change_to_arm(target_t *target, uint32_t *r0, uint32_t *pc)
- {
- LOG_ERROR("%s: there is no Thumb state on FA526", __func__);
- }
-
- static void fa526_read_core_regs(target_t *target,
- uint32_t mask, uint32_t* core_regs[16])
- {
- int i;
- struct arm7_9_common_s *arm7_9 = target_to_arm7_9(target);
- arm_jtag_t *jtag_info = &arm7_9->jtag_info;
-
- /* STMIA r0-15, [r0] at debug speed
- * register values will start to appear on 4th DCLK
- */
- arm9tdmi_clock_out(jtag_info, ARMV4_5_STMIA(0, mask & 0xffff, 0, 0), 0, NULL, 0);
-
- /* fetch NOP, STM in DECODE stage */
- arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
- /* fetch NOP, STM in SHIFT stage */
- arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
- /* fetch NOP, STM in EXECUTE stage (1st cycle) */
- arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
-
- for (i = 0; i <= 15; i++)
- {
- if (mask & (1 << i))
- /* nothing fetched, STM in MEMORY (i'th cycle) */
- arm9tdmi_clock_data_in(jtag_info, core_regs[i]);
- }
- }
-
- static void fa526_read_core_regs_target_buffer(target_t *target,
- uint32_t mask, void* buffer, int size)
- {
- int i;
- struct arm7_9_common_s *arm7_9 = target_to_arm7_9(target);
- arm_jtag_t *jtag_info = &arm7_9->jtag_info;
- int be = (target->endianness == TARGET_BIG_ENDIAN) ? 1 : 0;
- uint32_t *buf_u32 = buffer;
- uint16_t *buf_u16 = buffer;
- uint8_t *buf_u8 = buffer;
-
- /* STMIA r0-15, [r0] at debug speed
- * register values will start to appear on 4th DCLK
- */
- arm9tdmi_clock_out(jtag_info, ARMV4_5_STMIA(0, mask & 0xffff, 0, 0), 0, NULL, 0);
-
- /* fetch NOP, STM in DECODE stage */
- arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
- /* fetch NOP, STM in SHIFT stage */
- arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
- /* fetch NOP, STM in EXECUTE stage (1st cycle) */
- arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
-
- for (i = 0; i <= 15; i++)
- {
- if (mask & (1 << i))
- /* nothing fetched, STM in MEMORY (i'th cycle) */
- switch (size)
- {
- case 4:
- arm9tdmi_clock_data_in_endianness(jtag_info, buf_u32++, 4, be);
- break;
- case 2:
- arm9tdmi_clock_data_in_endianness(jtag_info, buf_u16++, 2, be);
- break;
- case 1:
- arm9tdmi_clock_data_in_endianness(jtag_info, buf_u8++, 1, be);
- break;
- }
- }
- }
-
- static void fa526_read_xpsr(target_t *target, uint32_t *xpsr, int spsr)
- {
- struct arm7_9_common_s *arm7_9 = target_to_arm7_9(target);
- arm_jtag_t *jtag_info = &arm7_9->jtag_info;
-
- /* MRS r0, cpsr */
- arm9tdmi_clock_out(jtag_info, ARMV4_5_MRS(0, spsr & 1), 0, NULL, 0);
- arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
- arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
- arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
- arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
- arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
-
- /* STR r0, [r15] */
- arm9tdmi_clock_out(jtag_info, ARMV4_5_STR(0, 15), 0, NULL, 0);
- /* fetch NOP, STR in DECODE stage */
- arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
- /* fetch NOP, STR in SHIFT stage */
- arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
- /* fetch NOP, STR in EXECUTE stage (1st cycle) */
- arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
- /* nothing fetched, STR in MEMORY */
- arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, xpsr, 0);
- }
-
- static void fa526_write_xpsr(target_t *target, uint32_t xpsr, int spsr)
- {
- struct arm7_9_common_s *arm7_9 = target_to_arm7_9(target);
- arm_jtag_t *jtag_info = &arm7_9->jtag_info;
-
- LOG_DEBUG("xpsr: %8.8" PRIx32 ", spsr: %i", xpsr, spsr);
-
- /* MSR1 fetched */
- arm9tdmi_clock_out(jtag_info, ARMV4_5_MSR_IM(xpsr & 0xff, 0, 1, spsr), 0, NULL, 0);
- /* MSR2 fetched, MSR1 in DECODE */
- arm9tdmi_clock_out(jtag_info, ARMV4_5_MSR_IM((xpsr & 0xff00) >> 8, 0xc, 2, spsr), 0, NULL, 0);
- /* MSR3 fetched, MSR1 in SHIFT, MSR2 in DECODE */
- arm9tdmi_clock_out(jtag_info, ARMV4_5_MSR_IM((xpsr & 0xff0000) >> 16, 0x8, 4, spsr), 0, NULL, 0);
- /* MSR4 fetched, MSR1 in EXECUTE (1), MSR2 in SHIFT, MSR3 in DECODE */
- arm9tdmi_clock_out(jtag_info, ARMV4_5_MSR_IM((xpsr & 0xff000000) >> 24, 0x4, 8, spsr), 0, NULL, 0);
- /* nothing fetched, MSR1 in EXECUTE (2) */
- arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
- /* nothing fetched, MSR1 in EXECUTE (3) */
- arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
- /* nothing fetched, MSR2 in EXECUTE (1), MSR3 in SHIFT, MSR4 in DECODE */
- arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
- /* nothing fetched, MSR2 in EXECUTE (2) */
- arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
- /* nothing fetched, MSR2 in EXECUTE (3) */
- arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
- /* NOP fetched, MSR3 in EXECUTE (1), MSR4 in SHIFT */
- arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
- /* nothing fetched, MSR3 in EXECUTE (2) */
- arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
- /* nothing fetched, MSR3 in EXECUTE (3) */
- arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
- /* NOP fetched, MSR4 in EXECUTE (1) */
- /* last MSR writes flags, which takes only one cycle */
- arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
- }
-
- static void fa526_write_xpsr_im8(target_t *target,
- uint8_t xpsr_im, int rot, int spsr)
- {
- struct arm7_9_common_s *arm7_9 = target_to_arm7_9(target);
- arm_jtag_t *jtag_info = &arm7_9->jtag_info;
-
- LOG_DEBUG("xpsr_im: %2.2x, rot: %i, spsr: %i", xpsr_im, rot, spsr);
-
- /* MSR fetched */
- arm9tdmi_clock_out(jtag_info, ARMV4_5_MSR_IM(xpsr_im, rot, 1, spsr), 0, NULL, 0);
- /* NOP fetched, MSR in DECODE */
- arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
- /* NOP fetched, MSR in SHIFT */
- arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
- /* NOP fetched, MSR in EXECUTE (1) */
- arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
-
- /* rot == 4 writes flags, which takes only one cycle */
- if (rot != 4)
- {
- /* nothing fetched, MSR in EXECUTE (2) */
- arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
- /* nothing fetched, MSR in EXECUTE (3) */
- arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
- }
- }
-
- static void fa526_write_core_regs(target_t *target,
- uint32_t mask, uint32_t core_regs[16])
- {
- int i;
- struct arm7_9_common_s *arm7_9 = target_to_arm7_9(target);
- arm_jtag_t *jtag_info = &arm7_9->jtag_info;
-
- /* LDMIA r0-15, [r0] at debug speed
- * register values will start to appear on 4th DCLK
- */
- arm9tdmi_clock_out(jtag_info, ARMV4_5_LDMIA(0, mask & 0xffff, 0, 0), 0, NULL, 0);
-
- /* fetch NOP, LDM in DECODE stage */
- arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
- /* fetch NOP, LDM in SHIFT stage */
- arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
- /* fetch NOP, LDM in EXECUTE stage (1st cycle) */
- arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
-
- for (i = 0; i <= 15; i++)
- {
- if (mask & (1 << i))
- /* nothing fetched, LDM still in EXECUTE (1 + i cycle) */
- arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, core_regs[i], NULL, 0);
- }
- arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
- }
-
- static void fa526_write_pc(target_t *target, uint32_t pc)
- {
- struct arm7_9_common_s *arm7_9 = target_to_arm7_9(target);
- arm_jtag_t *jtag_info = &arm7_9->jtag_info;
-
- /* LDMIA r0-15, [r0] at debug speed
- * register values will start to appear on 4th DCLK
- */
- arm9tdmi_clock_out(jtag_info, ARMV4_5_LDMIA(0, 0x8000, 0, 0), 0, NULL, 0);
-
- /* fetch NOP, LDM in DECODE stage */
- arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
- /* fetch NOP, LDM in SHIFT stage */
- arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
- /* fetch NOP, LDM in EXECUTE stage (1st cycle) */
- arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
- /* nothing fetched, LDM in EXECUTE stage (2nd cycle) (output data) */
- arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, pc, NULL, 0);
- /* nothing fetched, LDM in EXECUTE stage (3rd cycle) */
- arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
- /* fetch NOP, LDM in EXECUTE stage (4th cycle) */
- arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
- /* fetch NOP, LDM in EXECUTE stage (5th cycle) */
- arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
- }
-
- static void fa526_branch_resume_thumb(target_t *target)
- {
- LOG_ERROR("%s: there is no Thumb state on FA526", __func__);
- }
-
- static int fa526_init_arch_info_2(target_t *target,
- arm9tdmi_common_t *arm9tdmi, struct jtag_tap *tap)
- {
- arm7_9_common_t *arm7_9;
-
- arm7_9 = &arm9tdmi->arm7_9_common;
-
- /* prepare JTAG information for the new target */
- arm7_9->jtag_info.tap = tap;
- arm7_9->jtag_info.scann_size = 5;
-
- /* register arch-specific functions */
- arm7_9->examine_debug_reason = arm9tdmi_examine_debug_reason;
- arm7_9->change_to_arm = fa526_change_to_arm;
- arm7_9->read_core_regs = fa526_read_core_regs;
- arm7_9->read_core_regs_target_buffer = fa526_read_core_regs_target_buffer;
- arm7_9->read_xpsr = fa526_read_xpsr;
-
- arm7_9->write_xpsr = fa526_write_xpsr;
- arm7_9->write_xpsr_im8 = fa526_write_xpsr_im8;
- arm7_9->write_core_regs = fa526_write_core_regs;
-
- arm7_9->load_word_regs = arm9tdmi_load_word_regs;
- arm7_9->load_hword_reg = arm9tdmi_load_hword_reg;
- arm7_9->load_byte_reg = arm9tdmi_load_byte_reg;
-
- arm7_9->store_word_regs = arm9tdmi_store_word_regs;
- arm7_9->store_hword_reg = arm9tdmi_store_hword_reg;
- arm7_9->store_byte_reg = arm9tdmi_store_byte_reg;
-
- arm7_9->write_pc = fa526_write_pc;
- arm7_9->branch_resume = arm9tdmi_branch_resume;
- arm7_9->branch_resume_thumb = fa526_branch_resume_thumb;
-
- arm7_9->enable_single_step = arm9tdmi_enable_single_step;
- arm7_9->disable_single_step = arm9tdmi_disable_single_step;
-
- arm7_9->post_debug_entry = NULL;
-
- arm7_9->pre_restore_context = NULL;
- arm7_9->post_restore_context = NULL;
-
- /* initialize arch-specific breakpoint handling */
- arm7_9->arm_bkpt = 0xdeeedeee;
- arm7_9->thumb_bkpt = 0xdeee;
-
- arm7_9->dbgreq_adjust_pc = 3;
-
- arm7_9_init_arch_info(target, arm7_9);
-
- /* override use of DBGRQ, this is safe on ARM9TDMI */
- arm7_9->use_dbgrq = 1;
-
- /* all ARM9s have the vector catch register */
- arm7_9->has_vector_catch = 1;
-
- return ERROR_OK;
- }
-
- static int fa526_init_arch_info(target_t *target,
- arm920t_common_t *arm920t, struct jtag_tap *tap)
- {
- arm9tdmi_common_t *arm9tdmi = &arm920t->arm9tdmi_common;
- arm7_9_common_t *arm7_9 = &arm9tdmi->arm7_9_common;
-
- /* initialize arm9tdmi specific info (including arm7_9 and armv4_5)
- */
- fa526_init_arch_info_2(target, arm9tdmi, tap);
-
- arm920t->common_magic = ARM920T_COMMON_MAGIC;
-
- arm7_9->post_debug_entry = arm920t_post_debug_entry;
- arm7_9->pre_restore_context = arm920t_pre_restore_context;
-
- arm920t->armv4_5_mmu.armv4_5_cache.ctype = -1;
- arm920t->armv4_5_mmu.get_ttb = arm920t_get_ttb;
- arm920t->armv4_5_mmu.read_memory = arm7_9_read_memory;
- arm920t->armv4_5_mmu.write_memory = arm7_9_write_memory;
- arm920t->armv4_5_mmu.disable_mmu_caches = arm920t_disable_mmu_caches;
- arm920t->armv4_5_mmu.enable_mmu_caches = arm920t_enable_mmu_caches;
- arm920t->armv4_5_mmu.has_tiny_pages = 1;
- arm920t->armv4_5_mmu.mmu_enabled = 0;
-
- /* disabling linefills leads to lockups, so keep them enabled for now
- * this doesn't affect correctness, but might affect timing issues, if
- * important data is evicted from the cache during the debug session
- * */
- arm920t->preserve_cache = 0;
-
- /* override hw single-step capability from ARM9TDMI */
- arm7_9->has_single_step = 1;
-
- return ERROR_OK;
- }
-
- static int fa526_target_create(struct target_s *target, Jim_Interp *interp)
- {
- arm920t_common_t *arm920t = calloc(1,sizeof(arm920t_common_t));
-
- return fa526_init_arch_info(target, arm920t, target->tap);
- }
-
- /** Holds methods for FA526 targets. */
- target_type_t fa526_target =
- {
- .name = "fa526",
-
- .poll = arm7_9_poll,
- .arch_state = arm920t_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 = arm920t_soft_reset_halt,
-
- .get_gdb_reg_list = armv4_5_get_gdb_reg_list,
-
- .read_memory = arm920t_read_memory,
- .write_memory = arm920t_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 = arm920t_register_commands,
- .target_create = fa526_target_create,
- .init_target = arm9tdmi_init_target,
- .examine = arm9tdmi_examine,
- };
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