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-rw-r--r--src/target/arm920t.c715
1 files changed, 611 insertions, 104 deletions
diff --git a/src/target/arm920t.c b/src/target/arm920t.c
index 54feaff2..91dbb29b 100644
--- a/src/target/arm920t.c
+++ b/src/target/arm920t.c
@@ -42,6 +42,9 @@ int arm920t_handle_cache_info_command(struct command_context_s *cmd_ctx, char *c
int arm920t_handle_md_phys_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
int arm920t_handle_mw_phys_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
+int arm920t_handle_read_cache_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
+int arm920t_handle_read_mmu_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
+
/* forward declarations */
int arm920t_target_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc, struct target_s *target);
int arm920t_init_target(struct command_context_s *cmd_ctx, struct target_s *target);
@@ -51,6 +54,8 @@ int arm920t_read_memory(struct target_s *target, u32 address, u32 size, u32 coun
int arm920t_write_memory(struct target_s *target, u32 address, u32 size, u32 count, u8 *buffer);
int arm920t_soft_reset_halt(struct target_s *target);
+#define ARM920T_CP15_PHYS_ADDR(x, y, z) ((x << 5) | (y << 1) << (z))
+
target_type_t arm920t_target =
{
.name = "arm920t",
@@ -141,10 +146,16 @@ int arm920t_read_cp15_physical(target_t *target, int reg_addr, u32 *value)
jtag_add_dr_scan(4, fields, -1);
- fields[1].in_value = (u8*)value;
+ fields[1].in_handler_priv = value;
+ fields[1].in_handler = arm_jtag_buf_to_u32;
jtag_add_dr_scan(4, fields, -1);
+#ifdef _DEBUG_INSTRUCTION_EXECUTION_
+ jtag_execute_queue();
+ DEBUG("addr: 0x%x value: %8.8x", reg_addr, *value);
+#endif
+
return ERROR_OK;
}
@@ -157,6 +168,9 @@ int arm920t_write_cp15_physical(target_t *target, int reg_addr, u32 value)
u8 access_type_buf = 1;
u8 reg_addr_buf = reg_addr & 0x3f;
u8 nr_w_buf = 1;
+ u8 value_buf[4];
+
+ buf_set_u32(value_buf, 0, 32, value);
jtag_add_end_state(TAP_RTI);
arm_jtag_scann(jtag_info, 0xf);
@@ -174,7 +188,7 @@ int arm920t_write_cp15_physical(target_t *target, int reg_addr, u32 value)
fields[1].device = jtag_info->chain_pos;
fields[1].num_bits = 32;
- fields[1].out_value = (u8*)&value;
+ fields[1].out_value = value_buf;
fields[1].out_mask = NULL;
fields[1].in_value = NULL;
fields[1].in_check_value = NULL;
@@ -204,31 +218,29 @@ int arm920t_write_cp15_physical(target_t *target, int reg_addr, u32 value)
jtag_add_dr_scan(4, fields, -1);
+#ifdef _DEBUG_INSTRUCTION_EXECUTION_
+ DEBUG("addr: 0x%x value: %8.8x", reg_addr, value);
+#endif
+
return ERROR_OK;
}
-int arm920t_read_cp15_interpreted(target_t *target, u32 opcode, u32 *value)
+int arm920t_execute_cp15(target_t *target, u32 cp15_opcode, u32 arm_opcode)
{
- u32 cp15c15 = 0x0;
+ armv4_5_common_t *armv4_5 = target->arch_info;
+ arm7_9_common_t *arm7_9 = armv4_5->arch_info;
+ arm_jtag_t *jtag_info = &arm7_9->jtag_info;
scan_field_t fields[4];
u8 access_type_buf = 0; /* interpreted access */
u8 reg_addr_buf = 0x0;
u8 nr_w_buf = 0;
- armv4_5_common_t *armv4_5 = target->arch_info;
- arm7_9_common_t *arm7_9 = armv4_5->arch_info;
- arm_jtag_t *jtag_info = &arm7_9->jtag_info;
- u32* context_p[1];
+ u8 cp15_opcode_buf[4];
- /* read-modify-write CP15 test state register
- * to enable interpreted access mode */
- arm920t_read_cp15_physical(target, 0x1e, &cp15c15);
- jtag_execute_queue();
- cp15c15 |= 1; /* set interpret mode */
- arm920t_write_cp15_physical(target, 0x1e, cp15c15);
-
jtag_add_end_state(TAP_RTI);
arm_jtag_scann(jtag_info, 0xf);
arm_jtag_set_instr(jtag_info, jtag_info->intest_instr);
+
+ buf_set_u32(cp15_opcode_buf, 0, 32, cp15_opcode);
fields[0].device = jtag_info->chain_pos;
fields[0].num_bits = 1;
@@ -242,7 +254,7 @@ int arm920t_read_cp15_interpreted(target_t *target, u32 opcode, u32 *value)
fields[1].device = jtag_info->chain_pos;
fields[1].num_bits = 32;
- fields[1].out_value = (u8*)&opcode;
+ fields[1].out_value = cp15_opcode_buf;
fields[1].out_mask = NULL;
fields[1].in_value = NULL;
fields[1].in_check_value = NULL;
@@ -272,45 +284,68 @@ int arm920t_read_cp15_interpreted(target_t *target, u32 opcode, u32 *value)
jtag_add_dr_scan(4, fields, -1);
- arm9tdmi_clock_out(jtag_info, ARMV4_5_LDR(0, 15), 0, NULL, 0);
+ arm9tdmi_clock_out(jtag_info, arm_opcode, 0, NULL, 0);
arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 1);
arm7_9_execute_sys_speed(target);
- jtag_execute_queue();
+
+ if (jtag_execute_queue() != ERROR_OK)
+ {
+ ERROR("failed executing JTAG queue, exiting");
+ exit(-1);
+ }
+
+ return ERROR_OK;
+}
+int arm920t_read_cp15_interpreted(target_t *target, u32 cp15_opcode, u32 address, u32 *value)
+{
+ armv4_5_common_t *armv4_5 = target->arch_info;
+ u32* regs_p[1];
+ u32 regs[2];
+ u32 cp15c15 = 0x0;
+
+ /* load address into R1 */
+ regs[1] = address;
+ arm9tdmi_write_core_regs(target, 0x2, regs);
+
/* read-modify-write CP15 test state register
- * to disable interpreted access mode */
+ * to enable interpreted access mode */
arm920t_read_cp15_physical(target, 0x1e, &cp15c15);
jtag_execute_queue();
+ cp15c15 |= 1; /* set interpret mode */
+ arm920t_write_cp15_physical(target, 0x1e, cp15c15);
+
+ /* execute CP15 instruction and ARM load (reading from coprocessor) */
+ arm920t_execute_cp15(target, cp15_opcode, ARMV4_5_LDR(0, 1));
+
+ /* disable interpreted access mode */
cp15c15 &= ~1U; /* clear interpret mode */
arm920t_write_cp15_physical(target, 0x1e, cp15c15);
- context_p[0] = value;
- arm9tdmi_read_core_regs(target, 0x1, context_p);
+ /* retrieve value from R0 */
+ regs_p[0] = value;
+ arm9tdmi_read_core_regs(target, 0x1, regs_p);
jtag_execute_queue();
- DEBUG("opcode: %8.8x, value: %8.8x", opcode, *value);
+#ifdef _DEBUG_INSTRUCTION_EXECUTION_
+ DEBUG("cp15_opcode: %8.8x, address: %8.8x, value: %8.8x", cp15_opcode, address, *value);
+#endif
ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 0).dirty = 1;
- ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 15).dirty = 1;
+ ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 1).dirty = 1;
return ERROR_OK;
}
-int arm920t_write_cp15_interpreted(target_t *target, u32 opcode, u32 value, u32 address)
+int arm920t_write_cp15_interpreted(target_t *target, u32 cp15_opcode, u32 value, u32 address)
{
u32 cp15c15 = 0x0;
- scan_field_t fields[4];
- u8 access_type_buf = 0; /* interpreted access */
- u8 reg_addr_buf = 0x0;
- u8 nr_w_buf = 0;
armv4_5_common_t *armv4_5 = target->arch_info;
- arm7_9_common_t *arm7_9 = armv4_5->arch_info;
- arm_jtag_t *jtag_info = &arm7_9->jtag_info;
u32 regs[2];
+ /* load value, address into R0, R1 */
regs[0] = value;
regs[1] = address;
-
arm9tdmi_write_core_regs(target, 0x3, regs);
/* read-modify-write CP15 test state register
@@ -320,65 +355,16 @@ int arm920t_write_cp15_interpreted(target_t *target, u32 opcode, u32 value, u32
cp15c15 |= 1; /* set interpret mode */
arm920t_write_cp15_physical(target, 0x1e, cp15c15);
- jtag_add_end_state(TAP_RTI);
- arm_jtag_scann(jtag_info, 0xf);
- arm_jtag_set_instr(jtag_info, jtag_info->intest_instr);
-
- fields[0].device = jtag_info->chain_pos;
- fields[0].num_bits = 1;
- fields[0].out_value = &access_type_buf;
- 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 = jtag_info->chain_pos;
- fields[1].num_bits = 32;
- fields[1].out_value = (u8*)&opcode;
- 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;
-
- fields[2].device = jtag_info->chain_pos;
- fields[2].num_bits = 6;
- fields[2].out_value = &reg_addr_buf;
- fields[2].out_mask = NULL;
- fields[2].in_value = NULL;
- fields[2].in_check_value = NULL;
- fields[2].in_check_mask = NULL;
- fields[2].in_handler = NULL;
- fields[2].in_handler_priv = NULL;
-
- fields[3].device = jtag_info->chain_pos;
- fields[3].num_bits = 1;
- fields[3].out_value = &nr_w_buf;
- fields[3].out_mask = NULL;
- fields[3].in_value = NULL;
- fields[3].in_check_value = NULL;
- fields[3].in_check_mask = NULL;
- fields[3].in_handler = NULL;
- fields[3].in_handler_priv = NULL;
-
- jtag_add_dr_scan(4, fields, -1);
-
- arm9tdmi_clock_out(jtag_info, ARMV4_5_STR(0, 1), 0, NULL, 0);
- arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 1);
- arm7_9_execute_sys_speed(target);
- jtag_execute_queue();
+ /* execute CP15 instruction and ARM store (writing to coprocessor) */
+ arm920t_execute_cp15(target, cp15_opcode, ARMV4_5_STR(0, 1));
- /* read-modify-write CP15 test state register
- * to disable interpreted access mode */
- arm920t_read_cp15_physical(target, 0x1e, &cp15c15);
- jtag_execute_queue();
+ /* disable interpreted access mode */
cp15c15 &= ~1U; /* set interpret mode */
arm920t_write_cp15_physical(target, 0x1e, cp15c15);
- DEBUG("opcode: %8.8x, value: %8.8x, address: %8.8x", opcode, value, address);
+#ifdef _DEBUG_INSTRUCTION_EXECUTION_
+ DEBUG("cp15_opcode: %8.8x, value: %8.8x, address: %8.8x", cp15_opcode, value, address);
+#endif
ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 0).dirty = 1;
ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 1).dirty = 1;
@@ -391,7 +377,7 @@ u32 arm920t_get_ttb(target_t *target)
int retval;
u32 ttb = 0x0;
- if ((retval = arm920t_read_cp15_interpreted(target, 0xeebf0f51, &ttb)) != ERROR_OK)
+ if ((retval = arm920t_read_cp15_interpreted(target, 0xeebf0f51, 0x0, &ttb)) != ERROR_OK)
return retval;
return ttb;
@@ -464,18 +450,20 @@ void arm920t_post_debug_entry(target_t *target)
arm920t->armv4_5_mmu.armv4_5_cache.i_cache_enabled = (arm920t->cp15_control_reg & 0x1000U) ? 1 : 0;
/* save i/d fault status and address register */
- arm920t_read_cp15_interpreted(target, 0xee150f10, &arm920t->d_fsr);
- arm920t_read_cp15_interpreted(target, 0xee150f30, &arm920t->i_fsr);
- arm920t_read_cp15_interpreted(target, 0xee160f10, &arm920t->d_far);
- arm920t_read_cp15_interpreted(target, 0xee160f30, &arm920t->i_far);
-
- /* read-modify-write CP15 test state register
- * to disable I/D-cache linefills */
- arm920t_read_cp15_physical(target, 0x1e, &cp15c15);
- jtag_execute_queue();
- cp15c15 |= 0x600;
- arm920t_write_cp15_physical(target, 0x1e, cp15c15);
+ arm920t_read_cp15_interpreted(target, 0xee150f10, 0x0, &arm920t->d_fsr);
+ arm920t_read_cp15_interpreted(target, 0xee150f30, 0x0, &arm920t->i_fsr);
+ arm920t_read_cp15_interpreted(target, 0xee160f10, 0x0, &arm920t->d_far);
+ arm920t_read_cp15_interpreted(target, 0xee160f30, 0x0, &arm920t->i_far);
+ if (arm920t->preserve_cache)
+ {
+ /* read-modify-write CP15 test state register
+ * to disable I/D-cache linefills */
+ arm920t_read_cp15_physical(target, 0x1e, &cp15c15);
+ jtag_execute_queue();
+ cp15c15 |= 0x600;
+ arm920t_write_cp15_physical(target, 0x1e, cp15c15);
+ }
}
void arm920t_pre_restore_context(target_t *target)
@@ -494,11 +482,13 @@ void arm920t_pre_restore_context(target_t *target)
/* read-modify-write CP15 test state register
* to reenable I/D-cache linefills */
- arm920t_read_cp15_physical(target, 0x1e, &cp15c15);
- jtag_execute_queue();
- cp15c15 &= ~0x600U;
- arm920t_write_cp15_physical(target, 0x1e, cp15c15);
-
+ if (arm920t->preserve_cache)
+ {
+ arm920t_read_cp15_physical(target, 0x1e, &cp15c15);
+ jtag_execute_queue();
+ cp15c15 &= ~0x600U;
+ arm920t_write_cp15_physical(target, 0x1e, cp15c15);
+ }
}
int arm920t_get_arch_pointers(target_t *target, armv4_5_common_t **armv4_5_p, arm7_9_common_t **arm7_9_p, arm9tdmi_common_t **arm9tdmi_p, arm920t_common_t **arm920t_p)
@@ -682,6 +672,8 @@ int arm920t_init_arch_info(target_t *target, arm920t_common_t *arm920t, int chai
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)
+ */
arm9tdmi_init_arch_info(target, arm9tdmi, chain_pos, variant);
arm9tdmi->arch_info = arm920t;
@@ -699,6 +691,13 @@ int arm920t_init_arch_info(target_t *target, arm920t_common_t *arm920t, int chai
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 */
arm9tdmi->has_single_step = 1;
return ERROR_OK;
@@ -751,9 +750,513 @@ int arm920t_register_commands(struct command_context_s *cmd_ctx)
register_command(cmd_ctx, arm920t_cmd, "mwh_phys", arm920t_handle_mw_phys_command, COMMAND_EXEC, "write memory half-word <physical addr> <value>");
register_command(cmd_ctx, arm920t_cmd, "mwb_phys", arm920t_handle_mw_phys_command, COMMAND_EXEC, "write memory byte <physical addr> <value>");
+ register_command(cmd_ctx, arm920t_cmd, "read_cache", arm920t_handle_read_cache_command, COMMAND_EXEC, "display I/D cache content");
+ register_command(cmd_ctx, arm920t_cmd, "read_mmu", arm920t_handle_read_mmu_command, COMMAND_EXEC, "display I/D mmu content");
+
return ERROR_OK;
}
+int arm920t_handle_read_cache_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;
+ arm7_9_common_t *arm7_9;
+ arm9tdmi_common_t *arm9tdmi;
+ arm920t_common_t *arm920t;
+ arm_jtag_t *jtag_info;
+ u32 cp15c15;
+ u32 cp15_ctrl, cp15_ctrl_saved;
+ u32 regs[16];
+ u32 *regs_p[16];
+ u32 C15_C_D_Ind, C15_C_I_Ind;
+ int i;
+ FILE *output;
+ arm920t_cache_line_t d_cache[8][64], i_cache[8][64];
+ int segment, index;
+
+ if (argc != 1)
+ {
+ command_print(cmd_ctx, "usage: arm920t read_cache <filename>");
+ return ERROR_OK;
+ }
+
+ if ((output = fopen(args[0], "w")) == NULL)
+ {
+ DEBUG("error opening cache content file");
+ return ERROR_OK;
+ }
+
+ for (i = 0; i < 16; i++)
+ regs_p[i] = &regs[i];
+
+ if (arm920t_get_arch_pointers(target, &armv4_5, &arm7_9, &arm9tdmi, &arm920t) != ERROR_OK)
+ {
+ command_print(cmd_ctx, "current target isn't an ARM920t target");
+ return ERROR_OK;
+ }
+
+ jtag_info = &arm7_9->jtag_info;
+
+ /* disable MMU and Caches */
+ arm920t_read_cp15_physical(target, ARM920T_CP15_PHYS_ADDR(0, 0x1, 0), &cp15_ctrl);
+ jtag_execute_queue();
+ cp15_ctrl_saved = cp15_ctrl;
+ cp15_ctrl &= ~(ARMV4_5_MMU_ENABLED | ARMV4_5_D_U_CACHE_ENABLED | ARMV4_5_I_CACHE_ENABLED);
+ arm920t_write_cp15_physical(target, ARM920T_CP15_PHYS_ADDR(0, 0x1, 0), cp15_ctrl);
+
+ /* read CP15 test state register */
+ arm920t_read_cp15_physical(target, ARM920T_CP15_PHYS_ADDR(0, 0xf, 0), &cp15c15);
+ jtag_execute_queue();
+
+ /* read DCache content */
+ fprintf(output, "DCache:\n");
+
+ /* go through segments 0 to nsets (8 on ARM920T, 4 on ARM922T) */
+ for (segment = 0; segment < arm920t->armv4_5_mmu.armv4_5_cache.d_u_size.nsets; segment++)
+ {
+ fprintf(output, "\nsegment: %i\n----------", segment);
+
+ /* Ra: r0 = SBZ(31:8):segment(7:5):SBZ(4:0) */
+ regs[0] = 0x0 | (segment << 5);
+ arm9tdmi_write_core_regs(target, 0x1, regs);
+
+ /* set interpret mode */
+ cp15c15 |= 0x1;
+ arm920t_write_cp15_physical(target, ARM920T_CP15_PHYS_ADDR(0, 0xf, 0), cp15c15);
+
+ /* D CAM Read, loads current victim into C15.C.D.Ind */
+ arm920t_execute_cp15(target, ARMV4_5_MCR(15,2,0,15,6,2), ARMV4_5_LDR(1, 0));
+
+ /* read current victim */
+ arm920t_read_cp15_physical(target, 0x3d, &C15_C_D_Ind);
+
+ /* clear interpret mode */
+ cp15c15 &= ~0x1;
+ arm920t_write_cp15_physical(target, 0x1e, cp15c15);
+
+ for (index = 0; index < 64; index++)
+ {
+ /* Ra: r0 = index(31:26):SBZ(25:8):segment(7:5):SBZ(4:0) */
+ regs[0] = 0x0 | (segment << 5) | (index << 26);
+ arm9tdmi_write_core_regs(target, 0x1, regs);
+
+ /* set interpret mode */
+ cp15c15 |= 0x1;
+ arm920t_write_cp15_physical(target, ARM920T_CP15_PHYS_ADDR(0, 0xf, 0), cp15c15);
+
+ /* Write DCache victim */
+ arm920t_execute_cp15(target, ARMV4_5_MCR(15,0,0,9,1,0), ARMV4_5_LDR(1, 0));
+
+ /* Read D RAM */
+ arm920t_execute_cp15(target, ARMV4_5_MCR(15,2,0,15,10,2), ARMV4_5_LDMIA(0, 0x1fe, 0, 0));
+
+ /* Read D CAM */
+ arm920t_execute_cp15(target, ARMV4_5_MCR(15,2,0,15,6,2), ARMV4_5_LDR(9, 0));
+
+ /* clear interpret mode */
+ cp15c15 &= ~0x1;
+ arm920t_write_cp15_physical(target, 0x1e, cp15c15);
+
+ /* read D RAM and CAM content */
+ arm9tdmi_read_core_regs(target, 0x3fe, regs_p);
+ jtag_execute_queue();
+
+ d_cache[segment][index].cam = regs[9];
+
+ /* mask LFSR[6] */
+ regs[9] &= 0xfffffffe;
+ fprintf(output, "\nsegment: %i, index: %i, CAM: 0x%8.8x, content (%s):\n", segment, index, regs[9], (regs[9] & 0x10) ? "valid" : "invalid");
+
+ for (i = 1; i < 9; i++)
+ {
+ d_cache[segment][index].data[i] = regs[i];
+ fprintf(output, "%i: 0x%8.8x\n", i-1, regs[i]);
+ }
+
+ }
+
+ /* Ra: r0 = index(31:26):SBZ(25:8):segment(7:5):SBZ(4:0) */
+ regs[0] = 0x0 | (segment << 5) | (C15_C_D_Ind << 26);
+ arm9tdmi_write_core_regs(target, 0x1, regs);
+
+ /* set interpret mode */
+ cp15c15 |= 0x1;
+ arm920t_write_cp15_physical(target, ARM920T_CP15_PHYS_ADDR(0, 0xf, 0), cp15c15);
+
+ /* Write DCache victim */
+ arm920t_execute_cp15(target, ARMV4_5_MCR(15,0,0,9,1,0), ARMV4_5_LDR(1, 0));
+
+ /* clear interpret mode */
+ cp15c15 &= ~0x1;
+ arm920t_write_cp15_physical(target, 0x1e, cp15c15);
+ }
+
+ /* read ICache content */
+ fprintf(output, "ICache:\n");
+
+ /* go through segments 0 to nsets (8 on ARM920T, 4 on ARM922T) */
+ for (segment = 0; segment < arm920t->armv4_5_mmu.armv4_5_cache.d_u_size.nsets; segment++)
+ {
+ fprintf(output, "segment: %i\n----------", segment);
+
+ /* Ra: r0 = SBZ(31:8):segment(7:5):SBZ(4:0) */
+ regs[0] = 0x0 | (segment << 5);
+ arm9tdmi_write_core_regs(target, 0x1, regs);
+
+ /* set interpret mode */
+ cp15c15 |= 0x1;
+ arm920t_write_cp15_physical(target, ARM920T_CP15_PHYS_ADDR(0, 0xf, 0), cp15c15);
+
+ /* I CAM Read, loads current victim into C15.C.I.Ind */
+ arm920t_execute_cp15(target, ARMV4_5_MCR(15,2,0,15,5,2), ARMV4_5_LDR(1, 0));
+
+ /* read current victim */
+ arm920t_read_cp15_physical(target, 0x3b, &C15_C_I_Ind);
+
+ /* clear interpret mode */
+ cp15c15 &= ~0x1;
+ arm920t_write_cp15_physical(target, 0x1e, cp15c15);
+
+ for (index = 0; index < 64; index++)
+ {
+ /* Ra: r0 = index(31:26):SBZ(25:8):segment(7:5):SBZ(4:0) */
+ regs[0] = 0x0 | (segment << 5) | (index << 26);
+ arm9tdmi_write_core_regs(target, 0x1, regs);
+
+ /* set interpret mode */
+ cp15c15 |= 0x1;
+ arm920t_write_cp15_physical(target, ARM920T_CP15_PHYS_ADDR(0, 0xf, 0), cp15c15);
+
+ /* Write ICache victim */
+ arm920t_execute_cp15(target, ARMV4_5_MCR(15,0,0,9,1,1), ARMV4_5_LDR(1, 0));
+
+ /* Read I RAM */
+ arm920t_execute_cp15(target, ARMV4_5_MCR(15,2,0,15,9,2), ARMV4_5_LDMIA(0, 0x1fe, 0, 0));
+
+ /* Read I CAM */
+ arm920t_execute_cp15(target, ARMV4_5_MCR(15,2,0,15,5,2), ARMV4_5_LDR(9, 0));
+
+ /* clear interpret mode */
+ cp15c15 &= ~0x1;
+ arm920t_write_cp15_physical(target, 0x1e, cp15c15);
+
+ /* read I RAM and CAM content */
+ arm9tdmi_read_core_regs(target, 0x3fe, regs_p);
+ jtag_execute_queue();
+
+ i_cache[segment][index].cam = regs[9];
+
+ /* mask LFSR[6] */
+ regs[9] &= 0xfffffffe;
+ fprintf(output, "\nsegment: %i, index: %i, CAM: 0x%8.8x, content (%s):\n", segment, index, regs[9], (regs[9] & 0x10) ? "valid" : "invalid");
+
+ for (i = 1; i < 9; i++)
+ {
+ i_cache[segment][index].data[i] = regs[i];
+ fprintf(output, "%i: 0x%8.8x\n", i-1, regs[i]);
+ }
+
+ }
+
+
+ /* Ra: r0 = index(31:26):SBZ(25:8):segment(7:5):SBZ(4:0) */
+ regs[0] = 0x0 | (segment << 5) | (C15_C_D_Ind << 26);
+ arm9tdmi_write_core_regs(target, 0x1, regs);
+
+ /* set interpret mode */
+ cp15c15 |= 0x1;
+ arm920t_write_cp15_physical(target, ARM920T_CP15_PHYS_ADDR(0, 0xf, 0), cp15c15);
+
+ /* Write ICache victim */
+ arm920t_execute_cp15(target, ARMV4_5_MCR(15,0,0,9,1,1), ARMV4_5_LDR(1, 0));
+
+ /* clear interpret mode */
+ cp15c15 &= ~0x1;
+ arm920t_write_cp15_physical(target, 0x1e, cp15c15);
+ }
+
+ /* restore CP15 MMU and Cache settings */
+ arm920t_write_cp15_physical(target, ARM920T_CP15_PHYS_ADDR(0, 0x1, 0), cp15_ctrl_saved);
+
+ command_print(cmd_ctx, "cache content successfully output to %s", args[0]);
+
+ fclose(output);
+
+ /* mark registers dirty */
+ ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 0).dirty = 1;
+ ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 1).dirty = 1;
+ ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 2).dirty = 1;
+ ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 3).dirty = 1;
+ ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 4).dirty = 1;
+ ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 5).dirty = 1;
+ ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 6).dirty = 1;
+ ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 7).dirty = 1;
+ ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 8).dirty = 1;
+ ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 9).dirty = 1;
+
+ return ERROR_OK;
+}
+
+int arm920t_handle_read_mmu_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;
+ arm7_9_common_t *arm7_9;
+ arm9tdmi_common_t *arm9tdmi;
+ arm920t_common_t *arm920t;
+ arm_jtag_t *jtag_info;
+ u32 cp15c15;
+ u32 cp15_ctrl, cp15_ctrl_saved;
+ u32 regs[16];
+ u32 *regs_p[16];
+ int i;
+ FILE *output;
+ u32 Dlockdown, Ilockdown;
+ arm920t_tlb_entry_t d_tlb[64], i_tlb[64];
+ int victim;
+
+ if (argc != 1)
+ {
+ command_print(cmd_ctx, "usage: arm920t read_mmu <filename>");
+ return ERROR_OK;
+ }
+
+ if ((output = fopen(args[0], "w")) == NULL)
+ {
+ DEBUG("error opening mmu content file");
+ return ERROR_OK;
+ }
+
+ for (i = 0; i < 16; i++)
+ regs_p[i] = &regs[i];
+
+ if (arm920t_get_arch_pointers(target, &armv4_5, &arm7_9, &arm9tdmi, &arm920t) != ERROR_OK)
+ {
+ command_print(cmd_ctx, "current target isn't an ARM920t target");
+ return ERROR_OK;
+ }
+
+ jtag_info = &arm7_9->jtag_info;
+
+ /* disable MMU and Caches */
+ arm920t_read_cp15_physical(target, ARM920T_CP15_PHYS_ADDR(0, 0x1, 0), &cp15_ctrl);
+ jtag_execute_queue();
+ cp15_ctrl_saved = cp15_ctrl;
+ cp15_ctrl &= ~(ARMV4_5_MMU_ENABLED | ARMV4_5_D_U_CACHE_ENABLED | ARMV4_5_I_CACHE_ENABLED);
+ arm920t_write_cp15_physical(target, ARM920T_CP15_PHYS_ADDR(0, 0x1, 0), cp15_ctrl);
+
+ /* read CP15 test state register */
+ arm920t_read_cp15_physical(target, ARM920T_CP15_PHYS_ADDR(0, 0xf, 0), &cp15c15);
+ jtag_execute_queue();
+
+ /* prepare reading D TLB content
+ * */
+
+ /* set interpret mode */
+ cp15c15 |= 0x1;
+ arm920t_write_cp15_physical(target, ARM920T_CP15_PHYS_ADDR(0, 0xf, 0), cp15c15);
+
+ /* Read D TLB lockdown */
+ arm920t_execute_cp15(target, ARMV4_5_MRC(15,0,0,10,0,0), ARMV4_5_LDR(1, 0));
+
+ /* clear interpret mode */
+ cp15c15 &= ~0x1;
+ arm920t_write_cp15_physical(target, 0x1e, cp15c15);
+
+ /* read D TLB lockdown stored to r1 */
+ arm9tdmi_read_core_regs(target, 0x2, regs_p);
+ jtag_execute_queue();
+ Dlockdown = regs[1];
+
+ for (victim = 0; victim < 64; victim += 8)
+ {
+ /* new lockdown value: base[31:26]:victim[25:20]:SBZ[19:1]:p[0]
+ * base remains unchanged, victim goes through entries 0 to 63 */
+ regs[1] = (Dlockdown & 0xfc000000) | (victim << 20);
+ arm9tdmi_write_core_regs(target, 0x2, regs);
+
+ /* set interpret mode */
+ cp15c15 |= 0x1;
+ arm920t_write_cp15_physical(target, ARM920T_CP15_PHYS_ADDR(0, 0xf, 0), cp15c15);
+
+ /* Write D TLB lockdown */
+ arm920t_execute_cp15(target, ARMV4_5_MCR(15,0,0,10,0,0), ARMV4_5_STR(1, 0));
+
+ /* Read D TLB CAM */
+ arm920t_execute_cp15(target, ARMV4_5_MCR(15,4,0,15,6,4), ARMV4_5_LDMIA(0, 0x3fc, 0, 0));
+
+ /* clear interpret mode */
+ cp15c15 &= ~0x1;
+ arm920t_write_cp15_physical(target, 0x1e, cp15c15);
+
+ /* read D TLB CAM content stored to r2-r9 */
+ arm9tdmi_read_core_regs(target, 0x3fc, regs_p);
+ jtag_execute_queue();
+
+ for (i = 0; i < 8; i++)
+ d_tlb[victim + i].cam = regs[i + 2];
+ }
+
+ for (victim = 0; victim < 64; victim++)
+ {
+ /* new lockdown value: base[31:26]:victim[25:20]:SBZ[19:1]:p[0]
+ * base remains unchanged, victim goes through entries 0 to 63 */
+ regs[1] = (Dlockdown & 0xfc000000) | (victim << 20);
+ arm9tdmi_write_core_regs(target, 0x2, regs);
+
+ /* set interpret mode */
+ cp15c15 |= 0x1;
+ arm920t_write_cp15_physical(target, ARM920T_CP15_PHYS_ADDR(0, 0xf, 0), cp15c15);
+
+ /* Write D TLB lockdown */
+ arm920t_execute_cp15(target, ARMV4_5_MCR(15,0,0,10,0,0), ARMV4_5_STR(1, 0));
+
+ /* Read D TLB RAM1 */
+ arm920t_execute_cp15(target, ARMV4_5_MCR(15,4,0,15,10,4), ARMV4_5_LDR(2,0));
+
+ /* Read D TLB RAM2 */
+ arm920t_execute_cp15(target, ARMV4_5_MCR(15,4,0,15,2,5), ARMV4_5_LDR(3,0));
+
+ /* clear interpret mode */
+ cp15c15 &= ~0x1;
+ arm920t_write_cp15_physical(target, 0x1e, cp15c15);
+
+ /* read D TLB RAM content stored to r2 and r3 */
+ arm9tdmi_read_core_regs(target, 0xc, regs_p);
+ jtag_execute_queue();
+
+ d_tlb[victim].ram1 = regs[2];
+ d_tlb[victim].ram2 = regs[3];
+ }
+
+ /* restore D TLB lockdown */
+ regs[1] = Dlockdown;
+ arm9tdmi_write_core_regs(target, 0x2, regs);
+
+ /* Write D TLB lockdown */
+ arm920t_execute_cp15(target, ARMV4_5_MCR(15,0,0,10,0,0), ARMV4_5_STR(1, 0));
+
+ /* prepare reading I TLB content
+ * */
+
+ /* set interpret mode */
+ cp15c15 |= 0x1;
+ arm920t_write_cp15_physical(target, ARM920T_CP15_PHYS_ADDR(0, 0xf, 0), cp15c15);
+
+ /* Read I TLB lockdown */
+ arm920t_execute_cp15(target, ARMV4_5_MRC(15,0,0,10,0,1), ARMV4_5_LDR(1, 0));
+
+ /* clear interpret mode */
+ cp15c15 &= ~0x1;
+ arm920t_write_cp15_physical(target, 0x1e, cp15c15);
+
+ /* read I TLB lockdown stored to r1 */
+ arm9tdmi_read_core_regs(target, 0x2, regs_p);
+ jtag_execute_queue();
+ Ilockdown = regs[1];
+
+ for (victim = 0; victim < 64; victim += 8)
+ {
+ /* new lockdown value: base[31:26]:victim[25:20]:SBZ[19:1]:p[0]
+ * base remains unchanged, victim goes through entries 0 to 63 */
+ regs[1] = (Ilockdown & 0xfc000000) | (victim << 20);
+ arm9tdmi_write_core_regs(target, 0x2, regs);
+
+ /* set interpret mode */
+ cp15c15 |= 0x1;
+ arm920t_write_cp15_physical(target, ARM920T_CP15_PHYS_ADDR(0, 0xf, 0), cp15c15);
+
+ /* Write I TLB lockdown */
+ arm920t_execute_cp15(target, ARMV4_5_MCR(15,0,0,10,0,1), ARMV4_5_STR(1, 0));
+
+ /* Read I TLB CAM */
+ arm920t_execute_cp15(target, ARMV4_5_MCR(15,4,0,15,5,4), ARMV4_5_LDMIA(0, 0x3fc, 0, 0));
+
+ /* clear interpret mode */
+ cp15c15 &= ~0x1;
+ arm920t_write_cp15_physical(target, 0x1e, cp15c15);
+
+ /* read I TLB CAM content stored to r2-r9 */
+ arm9tdmi_read_core_regs(target, 0x3fc, regs_p);
+ jtag_execute_queue();
+
+ for (i = 0; i < 8; i++)
+ i_tlb[i + victim].cam = regs[i + 2];
+ }
+
+ for (victim = 0; victim < 64; victim++)
+ {
+ /* new lockdown value: base[31:26]:victim[25:20]:SBZ[19:1]:p[0]
+ * base remains unchanged, victim goes through entries 0 to 63 */
+ regs[1] = (Dlockdown & 0xfc000000) | (victim << 20);
+ arm9tdmi_write_core_regs(target, 0x2, regs);
+
+ /* set interpret mode */
+ cp15c15 |= 0x1;
+ arm920t_write_cp15_physical(target, ARM920T_CP15_PHYS_ADDR(0, 0xf, 0), cp15c15);
+
+ /* Write I TLB lockdown */
+ arm920t_execute_cp15(target, ARMV4_5_MCR(15,0,0,10,0,1), ARMV4_5_STR(1, 0));
+
+ /* Read I TLB RAM1 */
+ arm920t_execute_cp15(target, ARMV4_5_MCR(15,4,0,15,9,4), ARMV4_5_LDR(2,0));
+
+ /* Read I TLB RAM2 */
+ arm920t_execute_cp15(target, ARMV4_5_MCR(15,4,0,15,1,5), ARMV4_5_LDR(3,0));
+
+ /* clear interpret mode */
+ cp15c15 &= ~0x1;
+ arm920t_write_cp15_physical(target, 0x1e, cp15c15);
+
+ /* read I TLB RAM content stored to r2 and r3 */
+ arm9tdmi_read_core_regs(target, 0xc, regs_p);
+ jtag_execute_queue();
+
+ i_tlb[victim].ram1 = regs[2];
+ i_tlb[victim].ram2 = regs[3];
+ }
+
+ /* restore I TLB lockdown */
+ regs[1] = Ilockdown;
+ arm9tdmi_write_core_regs(target, 0x2, regs);
+
+ /* Write I TLB lockdown */
+ arm920t_execute_cp15(target, ARMV4_5_MCR(15,0,0,10,0,1), ARMV4_5_STR(1, 0));
+
+ /* restore CP15 MMU and Cache settings */
+ arm920t_write_cp15_physical(target, ARM920T_CP15_PHYS_ADDR(0, 0x1, 0), cp15_ctrl_saved);
+
+ /* output data to file */
+ fprintf(output, "D TLB content:\n");
+ for (i = 0; i < 64; i++)
+ {
+ fprintf(output, "%i: 0x%8.8x 0x%8.8x 0x%8.8x %s\n", i, d_tlb[i].cam, d_tlb[i].ram1, d_tlb[i].ram2, (d_tlb[i].cam & 0x20) ? "(valid)" : "(invalid)");
+ }
+
+ fprintf(output, "\n\nI TLB content:\n");
+ for (i = 0; i < 64; i++)
+ {
+ fprintf(output, "%i: 0x%8.8x 0x%8.8x 0x%8.8x %s\n", i, i_tlb[i].cam, i_tlb[i].ram1, i_tlb[i].ram2, (i_tlb[i].cam & 0x20) ? "(valid)" : "(invalid)");
+ }
+
+ command_print(cmd_ctx, "mmu content successfully output to %s", args[0]);
+
+ fclose(output);
+
+ /* mark registers dirty */
+ ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 0).dirty = 1;
+ ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 1).dirty = 1;
+ ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 2).dirty = 1;
+ ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 3).dirty = 1;
+ ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 4).dirty = 1;
+ ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 5).dirty = 1;
+ ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 6).dirty = 1;
+ ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 7).dirty = 1;
+ ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 8).dirty = 1;
+ ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 9).dirty = 1;
+
+ return ERROR_OK;
+}
int arm920t_handle_cp15_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
{
int retval;
@@ -842,7 +1345,7 @@ int arm920t_handle_cp15i_command(struct command_context_s *cmd_ctx, char *cmd, c
if (argc == 1)
{
u32 value;
- if ((retval = arm920t_read_cp15_interpreted(target, opcode, &value)) != ERROR_OK)
+ if ((retval = arm920t_read_cp15_interpreted(target, opcode, 0x0, &value)) != ERROR_OK)
{
command_print(cmd_ctx, "couldn't execute %8.8x", opcode);
return ERROR_OK;
@@ -872,6 +1375,10 @@ int arm920t_handle_cp15i_command(struct command_context_s *cmd_ctx, char *cmd, c
command_print(cmd_ctx, "%8.8x: %8.8x %8.8x", opcode, value, address);
}
}
+ else
+ {
+ command_print(cmd_ctx, "usage: arm920t cp15i <opcode> [value] [address]");
+ }
return ERROR_OK;
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-06-01 09:16:27 +0000