use COMMAND_REGISTER macro
[fw/openocd] / src / target / arm11.c
index cdeb420039718dc947ea0ce73e8f7945c37ebc00..66954fa72069c6a78a2a610e75319e4b1ed26730 100644 (file)
 #include "config.h"
 #endif
 
-#include "arm11.h"
+#include "etm.h"
 #include "breakpoints.h"
 #include "arm11_dbgtap.h"
-#include "armv4_5.h"
 #include "arm_simulator.h"
 #include "time_support.h"
 #include "target_type.h"
 #include "algorithm.h"
+#include "register.h"
 
 
 #if 0
 #define _DEBUG_INSTRUCTION_EXECUTION_
 #endif
 
-#if 0
-#define FNC_INFO       LOG_DEBUG("-")
-#else
-#define FNC_INFO
-#endif
-
-#if 1
-#define FNC_INFO_NOTIMPLEMENTED do { LOG_DEBUG("NOT IMPLEMENTED"); /*exit(-1);*/ } while (0)
-#else
-#define FNC_INFO_NOTIMPLEMENTED
-#endif
-
 static bool arm11_config_memwrite_burst = true;
 static bool arm11_config_memwrite_error_fatal = true;
 static uint32_t arm11_vcr = 0;
 static bool arm11_config_step_irq_enable = false;
 static bool arm11_config_hardware_step = false;
 
-static int arm11_regs_arch_type = -1;
-
 enum arm11_regtype
 {
-       ARM11_REGISTER_CORE,
-       ARM11_REGISTER_CPSR,
-
-       ARM11_REGISTER_FX,
-       ARM11_REGISTER_FPS,
-
-       ARM11_REGISTER_FIQ,
-       ARM11_REGISTER_SVC,
-       ARM11_REGISTER_ABT,
-       ARM11_REGISTER_IRQ,
-       ARM11_REGISTER_UND,
-       ARM11_REGISTER_MON,
-
-       ARM11_REGISTER_SPSR_FIQ,
-       ARM11_REGISTER_SPSR_SVC,
-       ARM11_REGISTER_SPSR_ABT,
-       ARM11_REGISTER_SPSR_IRQ,
-       ARM11_REGISTER_SPSR_UND,
-       ARM11_REGISTER_SPSR_MON,
-
        /* debug regs */
        ARM11_REGISTER_DSCR,
        ARM11_REGISTER_WDTR,
@@ -100,69 +66,6 @@ struct arm11_reg_defs
 /* update arm11_regcache_ids when changing this */
 static const struct arm11_reg_defs arm11_reg_defs[] =
 {
-       {"r0",  0,      0,      ARM11_REGISTER_CORE},
-       {"r1",  1,      1,      ARM11_REGISTER_CORE},
-       {"r2",  2,      2,      ARM11_REGISTER_CORE},
-       {"r3",  3,      3,      ARM11_REGISTER_CORE},
-       {"r4",  4,      4,      ARM11_REGISTER_CORE},
-       {"r5",  5,      5,      ARM11_REGISTER_CORE},
-       {"r6",  6,      6,      ARM11_REGISTER_CORE},
-       {"r7",  7,      7,      ARM11_REGISTER_CORE},
-       {"r8",  8,      8,      ARM11_REGISTER_CORE},
-       {"r9",  9,      9,      ARM11_REGISTER_CORE},
-       {"r10", 10,     10,     ARM11_REGISTER_CORE},
-       {"r11", 11,     11,     ARM11_REGISTER_CORE},
-       {"r12", 12,     12,     ARM11_REGISTER_CORE},
-       {"sp",  13,     13,     ARM11_REGISTER_CORE},
-       {"lr",  14,     14,     ARM11_REGISTER_CORE},
-       {"pc",  15,     15,     ARM11_REGISTER_CORE},
-
-#if ARM11_REGCACHE_FREGS
-       {"f0",  0,      16,     ARM11_REGISTER_FX},
-       {"f1",  1,      17,     ARM11_REGISTER_FX},
-       {"f2",  2,      18,     ARM11_REGISTER_FX},
-       {"f3",  3,      19,     ARM11_REGISTER_FX},
-       {"f4",  4,      20,     ARM11_REGISTER_FX},
-       {"f5",  5,      21,     ARM11_REGISTER_FX},
-       {"f6",  6,      22,     ARM11_REGISTER_FX},
-       {"f7",  7,      23,     ARM11_REGISTER_FX},
-       {"fps", 0,      24,     ARM11_REGISTER_FPS},
-#endif
-
-       {"cpsr",        0,      25,     ARM11_REGISTER_CPSR},
-
-#if ARM11_REGCACHE_MODEREGS
-       {"r8_fiq",      8,      -1,     ARM11_REGISTER_FIQ},
-       {"r9_fiq",      9,      -1,     ARM11_REGISTER_FIQ},
-       {"r10_fiq",     10,     -1,     ARM11_REGISTER_FIQ},
-       {"r11_fiq",     11,     -1,     ARM11_REGISTER_FIQ},
-       {"r12_fiq",     12,     -1,     ARM11_REGISTER_FIQ},
-       {"r13_fiq",     13,     -1,     ARM11_REGISTER_FIQ},
-       {"r14_fiq",     14,     -1,     ARM11_REGISTER_FIQ},
-       {"spsr_fiq", 0, -1,     ARM11_REGISTER_SPSR_FIQ},
-
-       {"r13_svc",     13,     -1,     ARM11_REGISTER_SVC},
-       {"r14_svc",     14,     -1,     ARM11_REGISTER_SVC},
-       {"spsr_svc", 0, -1,     ARM11_REGISTER_SPSR_SVC},
-
-       {"r13_abt",     13,     -1,     ARM11_REGISTER_ABT},
-       {"r14_abt",     14,     -1,     ARM11_REGISTER_ABT},
-       {"spsr_abt", 0, -1,     ARM11_REGISTER_SPSR_ABT},
-
-       {"r13_irq",     13,     -1,     ARM11_REGISTER_IRQ},
-       {"r14_irq",     14,     -1,     ARM11_REGISTER_IRQ},
-       {"spsr_irq", 0, -1,     ARM11_REGISTER_SPSR_IRQ},
-
-       {"r13_und",     13,     -1,     ARM11_REGISTER_UND},
-       {"r14_und",     14,     -1,     ARM11_REGISTER_UND},
-       {"spsr_und", 0, -1,     ARM11_REGISTER_SPSR_UND},
-
-       /* ARM1176 only */
-       {"r13_mon",     13,     -1,     ARM11_REGISTER_MON},
-       {"r14_mon",     14,     -1,     ARM11_REGISTER_MON},
-       {"spsr_mon", 0, -1,     ARM11_REGISTER_SPSR_MON},
-#endif
-
        /* Debug Registers */
        {"dscr",        0,      -1,     ARM11_REGISTER_DSCR},
        {"wdtr",        0,      -1,     ARM11_REGISTER_WDTR},
@@ -171,74 +74,6 @@ static const struct arm11_reg_defs arm11_reg_defs[] =
 
 enum arm11_regcache_ids
 {
-       ARM11_RC_R0,
-       ARM11_RC_RX                     = ARM11_RC_R0,
-
-       ARM11_RC_R1,
-       ARM11_RC_R2,
-       ARM11_RC_R3,
-       ARM11_RC_R4,
-       ARM11_RC_R5,
-       ARM11_RC_R6,
-       ARM11_RC_R7,
-       ARM11_RC_R8,
-       ARM11_RC_R9,
-       ARM11_RC_R10,
-       ARM11_RC_R11,
-       ARM11_RC_R12,
-       ARM11_RC_R13,
-       ARM11_RC_SP                     = ARM11_RC_R13,
-       ARM11_RC_R14,
-       ARM11_RC_LR                     = ARM11_RC_R14,
-       ARM11_RC_R15,
-       ARM11_RC_PC                     = ARM11_RC_R15,
-
-#if ARM11_REGCACHE_FREGS
-       ARM11_RC_F0,
-       ARM11_RC_FX                     = ARM11_RC_F0,
-       ARM11_RC_F1,
-       ARM11_RC_F2,
-       ARM11_RC_F3,
-       ARM11_RC_F4,
-       ARM11_RC_F5,
-       ARM11_RC_F6,
-       ARM11_RC_F7,
-       ARM11_RC_FPS,
-#endif
-
-       ARM11_RC_CPSR,
-
-#if ARM11_REGCACHE_MODEREGS
-       ARM11_RC_R8_FIQ,
-       ARM11_RC_R9_FIQ,
-       ARM11_RC_R10_FIQ,
-       ARM11_RC_R11_FIQ,
-       ARM11_RC_R12_FIQ,
-       ARM11_RC_R13_FIQ,
-       ARM11_RC_R14_FIQ,
-       ARM11_RC_SPSR_FIQ,
-
-       ARM11_RC_R13_SVC,
-       ARM11_RC_R14_SVC,
-       ARM11_RC_SPSR_SVC,
-
-       ARM11_RC_R13_ABT,
-       ARM11_RC_R14_ABT,
-       ARM11_RC_SPSR_ABT,
-
-       ARM11_RC_R13_IRQ,
-       ARM11_RC_R14_IRQ,
-       ARM11_RC_SPSR_IRQ,
-
-       ARM11_RC_R13_UND,
-       ARM11_RC_R14_UND,
-       ARM11_RC_SPSR_UND,
-
-       ARM11_RC_R13_MON,
-       ARM11_RC_R14_MON,
-       ARM11_RC_SPSR_MON,
-#endif
-
        ARM11_RC_DSCR,
        ARM11_RC_WDTR,
        ARM11_RC_RDTR,
@@ -246,40 +81,6 @@ enum arm11_regcache_ids
        ARM11_RC_MAX,
 };
 
-#define ARM11_GDB_REGISTER_COUNT       26
-
-/* FIXME these are *identical* to the ARMv4_5 dummies ...  except
- * for their names, and being static vs global, and having different
- * addresses.  Ditto ARMv7a and ARMv7m dummies.
- */
-
-static uint8_t arm11_gdb_dummy_fp_value[12];
-
-static struct reg arm11_gdb_dummy_fp_reg =
-{
-       .name = "GDB dummy floating-point register",
-       .value = arm11_gdb_dummy_fp_value,
-       .dirty = 0,
-       .valid = 1,
-       .size = 96,
-       .arch_info = NULL,
-       .arch_type = 0,
-};
-
-static uint8_t arm11_gdb_dummy_fps_value[4];
-
-static struct reg arm11_gdb_dummy_fps_reg =
-{
-       .name = "GDB dummy floating-point status register",
-       .value = arm11_gdb_dummy_fps_value,
-       .dirty = 0,
-       .valid = 1,
-       .size = 32,
-       .arch_info = NULL,
-       .arch_type = 0,
-};
-
-
 static int arm11_on_enter_debug_state(struct arm11_common *arm11);
 static int arm11_step(struct target *target, int current,
                uint32_t address, int handle_breakpoints);
@@ -288,9 +89,6 @@ static int arm11_build_reg_cache(struct target *target);
 static int arm11_set_reg(struct reg *reg, uint8_t *buf);
 static int arm11_get_reg(struct reg *reg);
 
-static void arm11_record_register_history(struct arm11_common * arm11);
-static void arm11_dump_reg_changes(struct arm11_common * arm11);
-
 
 /** Check and if necessary take control of the system
  *
@@ -301,8 +99,6 @@ static void arm11_dump_reg_changes(struct arm11_common * arm11);
  */
 static int arm11_check_init(struct arm11_common *arm11, uint32_t *dscr)
 {
-       FNC_INFO;
-
        uint32_t                        dscr_local_tmp_copy;
 
        if (!dscr)
@@ -360,14 +156,18 @@ static int arm11_check_init(struct arm11_common *arm11, uint32_t *dscr)
 static int arm11_on_enter_debug_state(struct arm11_common *arm11)
 {
        int retval;
-       FNC_INFO;
 
-       for (size_t i = 0; i < asizeof(arm11->reg_values); i++)
+       /* REVISIT entire cache should already be invalid !!! */
+       register_cache_invalidate(arm11->arm.core_cache);
+
+       for (size_t i = 0; i < ARRAY_SIZE(arm11->reg_values); i++)
        {
                arm11->reg_list[i].valid        = 1;
                arm11->reg_list[i].dirty        = 0;
        }
 
+       /* See e.g. ARM1136 TRM, "14.8.4 Entering Debug state" */
+
        /* Save DSCR */
        CHECK_RETVAL(arm11_read_DSCR(arm11, &R(DSCR)));
 
@@ -385,7 +185,7 @@ static int arm11_on_enter_debug_state(struct arm11_common *arm11)
                arm11_setup_field(arm11,  1, NULL, NULL,                chain5_fields + 1);
                arm11_setup_field(arm11,  1, NULL, NULL,                chain5_fields + 2);
 
-               arm11_add_dr_scan_vc(asizeof(chain5_fields), chain5_fields, TAP_DRPAUSE);
+               arm11_add_dr_scan_vc(ARRAY_SIZE(chain5_fields), chain5_fields, TAP_DRPAUSE);
        }
        else
        {
@@ -393,10 +193,12 @@ static int arm11_on_enter_debug_state(struct arm11_common *arm11)
        }
 
 
-       /* DSCR: set ARM11_DSCR_EXECUTE_ARM_INSTRUCTION_ENABLE */
-       /* ARM1176 spec says this is needed only for wDTR/rDTR's "ITR mode", but not to issue ITRs
-          ARM1136 seems to require this to issue ITR's as well */
-
+       /* DSCR: set ARM11_DSCR_EXECUTE_ARM_INSTRUCTION_ENABLE
+        *
+        * ARM1176 spec says this is needed only for wDTR/rDTR's "ITR mode",
+        * but not to issue ITRs. ARM1136 seems to require this to issue
+        * ITR's as well...
+        */
        uint32_t new_dscr = R(DSCR) | ARM11_DSCR_EXECUTE_ARM_INSTRUCTION_ENABLE;
 
        /* this executes JTAG queue: */
@@ -436,23 +238,20 @@ static int arm11_on_enter_debug_state(struct arm11_common *arm11)
        }
 #endif
 
+       /* Save registers.
+        *
+        * NOTE:  ARM1136 TRM suggests saving just R0 here now, then
+        * CPSR and PC after the rDTR stuff.  We do it all at once.
+        */
+       retval = arm_dpm_read_current_registers(&arm11->dpm);
+       if (retval != ERROR_OK)
+               LOG_ERROR("DPM REG READ -- fail %d", retval);
+
        retval = arm11_run_instr_data_prepare(arm11);
        if (retval != ERROR_OK)
                return retval;
 
-       /* save r0 - r14 */
-
-       /** \todo TODO: handle other mode registers */
-
-       for (size_t i = 0; i < 15; i++)
-       {
-               /* MCR p14,0,R?,c0,c5,0 */
-               retval = arm11_run_instr_data_from_core(arm11, 0xEE000E15 | (i << 12), &R(RX + i), 1);
-               if (retval != ERROR_OK)
-                       return retval;
-       }
-
-       /* save rDTR */
+       /* maybe save rDTR */
 
        /* check rDTRfull in DSCR */
 
@@ -468,34 +267,9 @@ static int arm11_on_enter_debug_state(struct arm11_common *arm11)
                arm11->reg_list[ARM11_RC_RDTR].valid    = 0;
        }
 
-       /* save CPSR */
-
-       /* MRS r0,CPSR (move CPSR -> r0 (-> wDTR -> local var)) */
-       retval = arm11_run_instr_data_from_core_via_r0(arm11, 0xE10F0000, &R(CPSR));
-       if (retval != ERROR_OK)
-               return retval;
-
-       /* save PC */
-
-       /* MOV R0,PC (move PC -> r0 (-> wDTR -> local var)) */
-       retval = arm11_run_instr_data_from_core_via_r0(arm11, 0xE1A0000F, &R(PC));
-       if (retval != ERROR_OK)
-               return retval;
-
-       /* adjust PC depending on ARM state */
-
-       if (R(CPSR) & ARM11_CPSR_J)     /* Java state */
-       {
-               arm11->reg_values[ARM11_RC_PC] -= 0;
-       }
-       else if (R(CPSR) & ARM11_CPSR_T)        /* Thumb state */
-       {
-               arm11->reg_values[ARM11_RC_PC] -= 4;
-       }
-       else                                    /* ARM state */
-       {
-               arm11->reg_values[ARM11_RC_PC] -= 8;
-       }
+       /* REVISIT Now that we've saved core state, there's may also
+        * be MMU and cache state to care about ...
+        */
 
        if (arm11->simulate_reset_on_next_halt)
        {
@@ -516,41 +290,9 @@ static int arm11_on_enter_debug_state(struct arm11_common *arm11)
        if (retval != ERROR_OK)
                return retval;
 
-       arm11_dump_reg_changes(arm11);
-
        return ERROR_OK;
 }
 
-void arm11_dump_reg_changes(struct arm11_common * arm11)
-{
-
-       if (!(debug_level >= LOG_LVL_DEBUG))
-       {
-               return;
-       }
-
-       for (size_t i = 0; i < ARM11_REGCACHE_COUNT; i++)
-       {
-               if (!arm11->reg_list[i].valid)
-               {
-                       if (arm11->reg_history[i].valid)
-                               LOG_DEBUG("%8s INVALID   (%08" PRIx32 ")", arm11_reg_defs[i].name, arm11->reg_history[i].value);
-               }
-               else
-               {
-                       if (arm11->reg_history[i].valid)
-                       {
-                               if (arm11->reg_history[i].value != arm11->reg_values[i])
-                                       LOG_DEBUG("%8s %08" PRIx32 " (%08" PRIx32 ")", arm11_reg_defs[i].name, arm11->reg_values[i], arm11->reg_history[i].value);
-                       }
-                       else
-                       {
-                               LOG_DEBUG("%8s %08" PRIx32 " (INVALID)", arm11_reg_defs[i].name, arm11->reg_values[i]);
-                       }
-               }
-       }
-}
-
 /** Restore processor state
   *
   * This is called in preparation for the RESTART function.
@@ -558,31 +300,18 @@ void arm11_dump_reg_changes(struct arm11_common * arm11)
   */
 static int arm11_leave_debug_state(struct arm11_common *arm11)
 {
-       FNC_INFO;
        int retval;
 
-       retval = arm11_run_instr_data_prepare(arm11);
-       if (retval != ERROR_OK)
-               return retval;
-
-       /** \todo TODO: handle other mode registers */
-
-       /* restore R1 - R14 */
+       /* See e.g. ARM1136 TRM, "14.8.5 Leaving Debug state" */
 
-       for (size_t i = 1; i < 15; i++)
-       {
-               if (!arm11->reg_list[ARM11_RC_RX + i].dirty)
-                       continue;
-
-               /* MRC p14,0,r?,c0,c5,0 */
-               arm11_run_instr_data_to_core1(arm11, 0xee100e15 | (i << 12), R(RX + i));
-
-               //      LOG_DEBUG("RESTORE R" ZU " %08x", i, R(RX + i));
-       }
+       /* NOTE:  the ARM1136 TRM suggests restoring all registers
+        * except R0/PC/CPSR right now.  Instead, we do them all
+        * at once, just a bit later on.
+        */
 
-       retval = arm11_run_instr_data_finish(arm11);
-       if (retval != ERROR_OK)
-               return retval;
+       /* REVISIT once we start caring about MMU and cache state,
+        * address it here ...
+        */
 
        /* spec says clear wDTR and rDTR; we assume they are clear as
           otherwise our programming would be sloppy */
@@ -605,50 +334,35 @@ static int arm11_leave_debug_state(struct arm11_common *arm11)
                }
        }
 
-       retval = arm11_run_instr_data_prepare(arm11);
-       if (retval != ERROR_OK)
-               return retval;
-
-       /* restore original wDTR */
-
+       /* maybe restore original wDTR */
        if ((R(DSCR) & ARM11_DSCR_WDTR_FULL) || arm11->reg_list[ARM11_RC_WDTR].dirty)
        {
+               retval = arm11_run_instr_data_prepare(arm11);
+               if (retval != ERROR_OK)
+                       return retval;
+
                /* MCR p14,0,R0,c0,c5,0 */
                retval = arm11_run_instr_data_to_core_via_r0(arm11, 0xee000e15, R(WDTR));
                if (retval != ERROR_OK)
                        return retval;
-       }
-
-       /* restore CPSR */
-
-       /* MSR CPSR,R0*/
-       retval = arm11_run_instr_data_to_core_via_r0(arm11, 0xe129f000, R(CPSR));
-       if (retval != ERROR_OK)
-               return retval;
-
-
-       /* restore PC */
-
-       /* MOV PC,R0 */
-       retval = arm11_run_instr_data_to_core_via_r0(arm11, 0xe1a0f000, R(PC));
-       if (retval != ERROR_OK)
-               return retval;
 
+               retval = arm11_run_instr_data_finish(arm11);
+               if (retval != ERROR_OK)
+                       return retval;
+       }
 
-       /* restore R0 */
+       /* restore CPSR, PC, and R0 ... after flushing any modified
+        * registers.
+        */
+       retval = arm_dpm_write_dirty_registers(&arm11->dpm);
 
-       /* MRC p14,0,r0,c0,c5,0 */
-       arm11_run_instr_data_to_core1(arm11, 0xee100e15, R(R0));
-
-       retval = arm11_run_instr_data_finish(arm11);
-       if (retval != ERROR_OK)
-               return retval;
+       register_cache_invalidate(arm11->arm.core_cache);
 
        /* restore DSCR */
 
        arm11_write_DSCR(arm11, R(DSCR));
 
-       /* restore rDTR */
+       /* maybe restore rDTR */
 
        if (R(DSCR) & ARM11_DSCR_RDTR_FULL || arm11->reg_list[ARM11_RC_RDTR].dirty)
        {
@@ -665,31 +379,17 @@ static int arm11_leave_debug_state(struct arm11_common *arm11)
                arm11_setup_field(arm11,  1, &Ready,    NULL, chain5_fields + 1);
                arm11_setup_field(arm11,  1, &Valid,    NULL, chain5_fields + 2);
 
-               arm11_add_dr_scan_vc(asizeof(chain5_fields), chain5_fields, TAP_DRPAUSE);
+               arm11_add_dr_scan_vc(ARRAY_SIZE(chain5_fields), chain5_fields, TAP_DRPAUSE);
        }
 
-       arm11_record_register_history(arm11);
+       /* now processor is ready to RESTART */
 
        return ERROR_OK;
 }
 
-static void arm11_record_register_history(struct arm11_common *arm11)
-{
-       for (size_t i = 0; i < ARM11_REGCACHE_COUNT; i++)
-       {
-               arm11->reg_history[i].value     = arm11->reg_values[i];
-               arm11->reg_history[i].valid     = arm11->reg_list[i].valid;
-
-               arm11->reg_list[i].valid        = 0;
-               arm11->reg_list[i].dirty        = 0;
-       }
-}
-
-
 /* poll current target status */
 static int arm11_poll(struct target *target)
 {
-       FNC_INFO;
        int retval;
        struct arm11_common *arm11 = target_to_arm11(target);
        uint32_t        dscr;
@@ -732,29 +432,27 @@ static int arm11_poll(struct target *target)
 /* architecture specific status reply */
 static int arm11_arch_state(struct target *target)
 {
-       struct arm11_common *arm11 = target_to_arm11(target);
+       int retval;
 
-       LOG_USER("target halted due to %s\ncpsr: 0x%8.8" PRIx32 " pc: 0x%8.8" PRIx32 "",
-                        Jim_Nvp_value2name_simple(nvp_target_debug_reason, target->debug_reason)->name,
-                        R(CPSR),
-                        R(PC));
+       retval = armv4_5_arch_state(target);
 
-       return ERROR_OK;
+       /* REVISIT also display ARM11-specific MMU and cache status ... */
+
+       return retval;
 }
 
 /* target request support */
 static int arm11_target_request_data(struct target *target,
                uint32_t size, uint8_t *buffer)
 {
-       FNC_INFO_NOTIMPLEMENTED;
+       LOG_WARNING("Not implemented: %s", __func__);
 
-       return ERROR_OK;
+       return ERROR_FAIL;
 }
 
 /* target execution control */
 static int arm11_halt(struct target *target)
 {
-       FNC_INFO;
        struct arm11_common *arm11 = target_to_arm11(target);
 
        LOG_DEBUG("target->state: %s",
@@ -816,11 +514,22 @@ static int arm11_halt(struct target *target)
        return ERROR_OK;
 }
 
+static uint32_t
+arm11_nextpc(struct arm11_common *arm11, int current, uint32_t address)
+{
+       void *value = arm11->arm.core_cache->reg_list[15].value;
+
+       if (!current)
+               buf_set_u32(value, 0, 32, address);
+       else
+               address = buf_get_u32(value, 0, 32);
+
+       return address;
+}
+
 static int arm11_resume(struct target *target, int current,
                uint32_t address, int handle_breakpoints, int debug_execution)
 {
-       FNC_INFO;
-
        //        LOG_DEBUG("current %d  address %08x  handle_breakpoints %d  debug_execution %d",
        //      current, address, handle_breakpoints, debug_execution);
 
@@ -836,16 +545,18 @@ static int arm11_resume(struct target *target, int current,
                return ERROR_TARGET_NOT_HALTED;
        }
 
-       if (!current)
-               R(PC) = address;
+       address = arm11_nextpc(arm11, current, address);
 
-       LOG_DEBUG("RESUME PC %08" PRIx32 "%s", R(PC), !current ? "!" : "");
+       LOG_DEBUG("RESUME PC %08" PRIx32 "%s", address, !current ? "!" : "");
 
        /* clear breakpoints/watchpoints and VCR*/
        arm11_sc7_clear_vbw(arm11);
 
-       /* Set up breakpoints */
        if (!debug_execution)
+               target_free_all_working_areas(target);
+
+       /* Set up breakpoints */
+       if (handle_breakpoints)
        {
                /* check if one matches PC and step over it if necessary */
 
@@ -853,7 +564,7 @@ static int arm11_resume(struct target *target, int current,
 
                for (bp = target->breakpoints; bp; bp = bp->next)
                {
-                       if (bp->address == R(PC))
+                       if (bp->address == address)
                        {
                                LOG_DEBUG("must step over %08" PRIx32 "", bp->address);
                                arm11_step(target, 1, 0, 0);
@@ -863,7 +574,7 @@ static int arm11_resume(struct target *target, int current,
 
                /* set all breakpoints */
 
-               size_t          brp_num = 0;
+               unsigned brp_num = 0;
 
                for (bp = target->breakpoints; bp; bp = bp->next)
                {
@@ -876,9 +587,10 @@ static int arm11_resume(struct target *target, int current,
                        brp[1].address  = ARM11_SC7_BCR0 + brp_num;
                        brp[1].value    = 0x1 | (3 << 1) | (0x0F << 5) | (0 << 14) | (0 << 16) | (0 << 20) | (0 << 21);
 
-                       arm11_sc7_run(arm11, brp, asizeof(brp));
+                       arm11_sc7_run(arm11, brp, ARRAY_SIZE(brp));
 
-                       LOG_DEBUG("Add BP " ZU " at %08" PRIx32 "", brp_num, bp->address);
+                       LOG_DEBUG("Add BP %d at %08" PRIx32, brp_num,
+                                       bp->address);
 
                        brp_num++;
                }
@@ -939,101 +651,9 @@ static int arm11_resume(struct target *target, int current,
        return ERROR_OK;
 }
 
-
-static int armv4_5_to_arm11(int reg)
-{
-       if (reg < 16)
-               return reg;
-       switch (reg)
-       {
-       case ARMV4_5_CPSR:
-               return ARM11_RC_CPSR;
-       case 16:
-               /* FIX!!! handle thumb better! */
-               return ARM11_RC_CPSR;
-       default:
-               LOG_ERROR("BUG: register translation from armv4_5 to arm11 not supported %d", reg);
-               exit(-1);
-       }
-}
-
-
-static uint32_t arm11_sim_get_reg(struct arm_sim_interface *sim, int reg)
-{
-       struct arm11_common * arm11 = (struct arm11_common *)sim->user_data;
-
-       reg=armv4_5_to_arm11(reg);
-
-       return buf_get_u32(arm11->reg_list[reg].value, 0, 32);
-}
-
-static void arm11_sim_set_reg(struct arm_sim_interface *sim,
-               int reg, uint32_t value)
-{
-       struct arm11_common * arm11 = (struct arm11_common *)sim->user_data;
-
-       reg=armv4_5_to_arm11(reg);
-
-       buf_set_u32(arm11->reg_list[reg].value, 0, 32, value);
-}
-
-static uint32_t arm11_sim_get_cpsr(struct arm_sim_interface *sim,
-               int pos, int bits)
-{
-       struct arm11_common * arm11 = (struct arm11_common *)sim->user_data;
-
-       return buf_get_u32(arm11->reg_list[ARM11_RC_CPSR].value, pos, bits);
-}
-
-static enum armv4_5_state arm11_sim_get_state(struct arm_sim_interface *sim)
-{
-//     struct arm11_common * arm11 = (struct arm11_common *)sim->user_data;
-
-       /* FIX!!!! we should implement thumb for arm11 */
-       return ARMV4_5_STATE_ARM;
-}
-
-static void arm11_sim_set_state(struct arm_sim_interface *sim,
-               enum armv4_5_state mode)
-{
-//     struct arm11_common * arm11 = (struct arm11_common *)sim->user_data;
-
-       /* FIX!!!! we should implement thumb for arm11 */
-       LOG_ERROR("Not implemetned!");
-}
-
-
-static enum armv4_5_mode arm11_sim_get_mode(struct arm_sim_interface *sim)
-{
-       //struct arm11_common * arm11 = (struct arm11_common *)sim->user_data;
-
-       /* FIX!!!! we should implement something that returns the current mode here!!! */
-       return ARMV4_5_MODE_USR;
-}
-
-static int arm11_simulate_step(struct target *target, uint32_t *dry_run_pc)
-{
-       struct arm_sim_interface sim;
-
-       sim.user_data=target->arch_info;
-       sim.get_reg=&arm11_sim_get_reg;
-       sim.set_reg=&arm11_sim_set_reg;
-       sim.get_reg_mode=&arm11_sim_get_reg;
-       sim.set_reg_mode=&arm11_sim_set_reg;
-       sim.get_cpsr=&arm11_sim_get_cpsr;
-       sim.get_mode=&arm11_sim_get_mode;
-       sim.get_state=&arm11_sim_get_state;
-       sim.set_state=&arm11_sim_set_state;
-
-       return arm_simulate_step_core(target, dry_run_pc, &sim);
-
-}
-
 static int arm11_step(struct target *target, int current,
                uint32_t address, int handle_breakpoints)
 {
-       FNC_INFO;
-
        LOG_DEBUG("target->state: %s",
                target_state_name(target));
 
@@ -1045,33 +665,28 @@ static int arm11_step(struct target *target, int current,
 
        struct arm11_common *arm11 = target_to_arm11(target);
 
-       if (!current)
-               R(PC) = address;
+       address = arm11_nextpc(arm11, current, address);
 
-       LOG_DEBUG("STEP PC %08" PRIx32 "%s", R(PC), !current ? "!" : "");
+       LOG_DEBUG("STEP PC %08" PRIx32 "%s", address, !current ? "!" : "");
 
 
        /** \todo TODO: Thumb not supported here */
 
        uint32_t        next_instruction;
 
-       CHECK_RETVAL(arm11_read_memory_word(arm11, R(PC), &next_instruction));
+       CHECK_RETVAL(arm11_read_memory_word(arm11, address, &next_instruction));
 
        /* skip over BKPT */
        if ((next_instruction & 0xFFF00070) == 0xe1200070)
        {
-               R(PC) += 4;
-               arm11->reg_list[ARM11_RC_PC].valid = 1;
-               arm11->reg_list[ARM11_RC_PC].dirty = 0;
+               address = arm11_nextpc(arm11, 0, address + 4);
                LOG_DEBUG("Skipping BKPT");
        }
        /* skip over Wait for interrupt / Standby */
        /* mcr  15, 0, r?, cr7, cr0, {4} */
        else if ((next_instruction & 0xFFFF0FFF) == 0xee070f90)
        {
-               R(PC) += 4;
-               arm11->reg_list[ARM11_RC_PC].valid = 1;
-               arm11->reg_list[ARM11_RC_PC].dirty = 0;
+               address = arm11_nextpc(arm11, 0, address + 4);
                LOG_DEBUG("Skipping WFI");
        }
        /* ignore B to self */
@@ -1099,27 +714,44 @@ static int arm11_step(struct target *target, int current,
 
                if (arm11_config_hardware_step)
                {
-                       /* hardware single stepping be used if possible or is it better to
-                        * always use the same code path? Hardware single stepping is not supported
-                        * on all hardware
+                       /* Hardware single stepping ("instruction address
+                        * mismatch") is used if enabled.  It's not quite
+                        * exactly "run one instruction"; "branch to here"
+                        * loops won't break, neither will some other cases,
+                        * but it's probably the best default.
+                        *
+                        * Hardware single stepping isn't supported on v6
+                        * debug modules.  ARM1176 and v7 can support it...
+                        *
+                        * FIXME Thumb stepping likely needs to use 0x03
+                        * or 0xc0 byte masks, not 0x0f.
                         */
-                        brp[0].value   = R(PC);
-                        brp[1].value   = 0x1 | (3 << 1) | (0x0F << 5) | (0 << 14) | (0 << 16) | (0 << 20) | (2 << 21);
+                        brp[0].value   = address;
+                        brp[1].value   = 0x1 | (3 << 1) | (0x0F << 5)
+                                       | (0 << 14) | (0 << 16) | (0 << 20)
+                                       | (2 << 21);
                } else
                {
-                       /* sets a breakpoint on the next PC(calculated by simulation),
+                       /* Sets a breakpoint on the next PC, as calculated
+                        * by instruction set simulation.
+                        *
+                        * REVISIT stepping Thumb on ARM1156 requires Thumb2
+                        * support from the simulator.
                         */
                        uint32_t next_pc;
                        int retval;
-                       retval = arm11_simulate_step(target, &next_pc);
+
+                       retval = arm_simulate_step(target, &next_pc);
                        if (retval != ERROR_OK)
                                return retval;
 
                        brp[0].value    = next_pc;
-                       brp[1].value    = 0x1 | (3 << 1) | (0x0F << 5) | (0 << 14) | (0 << 16) | (0 << 20) | (0 << 21);
+                       brp[1].value    = 0x1 | (3 << 1) | (0x0F << 5)
+                                       | (0 << 14) | (0 << 16) | (0 << 20)
+                                       | (0 << 21);
                }
 
-               CHECK_RETVAL(arm11_sc7_run(arm11, brp, asizeof(brp)));
+               CHECK_RETVAL(arm11_sc7_run(arm11, brp, ARRAY_SIZE(brp)));
 
                /* resume */
 
@@ -1187,7 +819,6 @@ static int arm11_step(struct target *target, int current,
 
 static int arm11_assert_reset(struct target *target)
 {
-       FNC_INFO;
        int retval;
        struct arm11_common *arm11 = target_to_arm11(target);
 
@@ -1254,37 +885,9 @@ static int arm11_deassert_reset(struct target *target)
 
 static int arm11_soft_reset_halt(struct target *target)
 {
-       FNC_INFO_NOTIMPLEMENTED;
+       LOG_WARNING("Not implemented: %s", __func__);
 
-       return ERROR_OK;
-}
-
-/* target register access for gdb */
-static int arm11_get_gdb_reg_list(struct target *target,
-               struct reg **reg_list[], int *reg_list_size)
-{
-       FNC_INFO;
-       struct arm11_common *arm11 = target_to_arm11(target);
-
-       *reg_list_size  = ARM11_GDB_REGISTER_COUNT;
-       *reg_list               = malloc(sizeof(struct reg*) * ARM11_GDB_REGISTER_COUNT);
-
-       for (size_t i = 16; i < 24; i++)
-       {
-               (*reg_list)[i] = &arm11_gdb_dummy_fp_reg;
-       }
-
-       (*reg_list)[24] = &arm11_gdb_dummy_fps_reg;
-
-       for (size_t i = 0; i < ARM11_REGCACHE_COUNT; i++)
-       {
-               if (arm11_reg_defs[i].gdb_num == -1)
-                       continue;
-
-               (*reg_list)[arm11_reg_defs[i].gdb_num] = arm11->reg_list + i;
-       }
-
-       return ERROR_OK;
+       return ERROR_FAIL;
 }
 
 /* target memory access
@@ -1302,8 +905,6 @@ static int arm11_read_memory_inner(struct target *target,
        /** \todo TODO: check if buffer cast to uint32_t* and uint16_t* might cause alignment problems */
        int retval;
 
-       FNC_INFO;
-
        if (target->state != TARGET_HALTED)
        {
                LOG_WARNING("target was not halted");
@@ -1326,8 +927,7 @@ static int arm11_read_memory_inner(struct target *target,
        switch (size)
        {
        case 1:
-               /** \todo TODO: check if dirty is the right choice to force a rewrite on arm11_resume() */
-               arm11->reg_list[ARM11_RC_R1].dirty = 1;
+               arm11->arm.core_cache->reg_list[1].dirty = true;
 
                for (size_t i = 0; i < count; i++)
                {
@@ -1347,7 +947,7 @@ static int arm11_read_memory_inner(struct target *target,
 
        case 2:
                {
-                       arm11->reg_list[ARM11_RC_R1].dirty = 1;
+                       arm11->arm.core_cache->reg_list[1].dirty = true;
 
                        for (size_t i = 0; i < count; i++)
                        {
@@ -1398,7 +998,6 @@ static int arm11_write_memory_inner(struct target *target,
                bool arm11_config_memrw_no_increment)
 {
        int retval;
-       FNC_INFO;
 
        if (target->state != TARGET_HALTED)
        {
@@ -1432,7 +1031,7 @@ static int arm11_write_memory_inner(struct target *target,
        {
        case 1:
                {
-                       arm11->reg_list[ARM11_RC_R1].dirty = 1;
+                       arm11->arm.core_cache->reg_list[1].dirty = true;
 
                        for (size_t i = 0; i < count; i++)
                        {
@@ -1454,7 +1053,7 @@ static int arm11_write_memory_inner(struct target *target,
 
        case 2:
                {
-                       arm11->reg_list[ARM11_RC_R1].dirty = 1;
+                       arm11->arm.core_cache->reg_list[1].dirty = true;
 
                        for (size_t i = 0; i < count; i++)
                        {
@@ -1542,8 +1141,6 @@ static int arm11_write_memory(struct target *target,
 static int arm11_bulk_write_memory(struct target *target,
                uint32_t address, uint32_t count, uint8_t *buffer)
 {
-       FNC_INFO;
-
        if (target->state != TARGET_HALTED)
        {
                LOG_WARNING("target was not halted");
@@ -1559,7 +1156,6 @@ static int arm11_bulk_write_memory(struct target *target,
 static int arm11_add_breakpoint(struct target *target,
                struct breakpoint *breakpoint)
 {
-       FNC_INFO;
        struct arm11_common *arm11 = target_to_arm11(target);
 
 #if 0
@@ -1590,7 +1186,6 @@ static int arm11_add_breakpoint(struct target *target,
 static int arm11_remove_breakpoint(struct target *target,
                struct breakpoint *breakpoint)
 {
-       FNC_INFO;
        struct arm11_common *arm11 = target_to_arm11(target);
 
        arm11->free_brps++;
@@ -1601,194 +1196,22 @@ static int arm11_remove_breakpoint(struct target *target,
 static int arm11_add_watchpoint(struct target *target,
                struct watchpoint *watchpoint)
 {
-       FNC_INFO_NOTIMPLEMENTED;
+       LOG_WARNING("Not implemented: %s", __func__);
 
-       return ERROR_OK;
+       return ERROR_FAIL;
 }
 
 static int arm11_remove_watchpoint(struct target *target,
                struct watchpoint *watchpoint)
 {
-       FNC_INFO_NOTIMPLEMENTED;
-
-       return ERROR_OK;
-}
-
-// HACKHACKHACK - FIXME mode/state
-/* target algorithm support */
-static int arm11_run_algorithm(struct target *target,
-               int num_mem_params, struct mem_param *mem_params,
-               int num_reg_params, struct reg_param *reg_params,
-               uint32_t entry_point, uint32_t exit_point,
-               int timeout_ms, void *arch_info)
-{
-       struct arm11_common *arm11 = target_to_arm11(target);
-//     enum armv4_5_state core_state = arm11->core_state;
-//     enum armv4_5_mode core_mode = arm11->core_mode;
-       uint32_t context[16];
-       uint32_t cpsr;
-       int exit_breakpoint_size = 0;
-       int retval = ERROR_OK;
-               LOG_DEBUG("Running algorithm");
-
-
-       if (target->state != TARGET_HALTED)
-       {
-               LOG_WARNING("target not halted");
-               return ERROR_TARGET_NOT_HALTED;
-       }
-
-       // FIXME
-//     if (armv4_5_mode_to_number(arm11->core_mode)==-1)
-//             return ERROR_FAIL;
-
-       // Save regs
-       for (unsigned i = 0; i < 16; i++)
-       {
-               context[i] = buf_get_u32((uint8_t*)(&arm11->reg_values[i]),0,32);
-               LOG_DEBUG("Save %u: 0x%" PRIx32 "", i, context[i]);
-       }
-
-       cpsr = buf_get_u32((uint8_t*)(arm11->reg_values + ARM11_RC_CPSR),0,32);
-       LOG_DEBUG("Save CPSR: 0x%" PRIx32 "", cpsr);
-
-       for (int i = 0; i < num_mem_params; i++)
-       {
-               target_write_buffer(target, mem_params[i].address, mem_params[i].size, mem_params[i].value);
-       }
-
-       // Set register parameters
-       for (int i = 0; i < num_reg_params; i++)
-       {
-               struct reg *reg = register_get_by_name(arm11->core_cache, reg_params[i].reg_name, 0);
-               if (!reg)
-               {
-                       LOG_ERROR("BUG: register '%s' not found", reg_params[i].reg_name);
-                       exit(-1);
-               }
-
-               if (reg->size != reg_params[i].size)
-               {
-                       LOG_ERROR("BUG: register '%s' size doesn't match reg_params[i].size", reg_params[i].reg_name);
-                       exit(-1);
-               }
-               arm11_set_reg(reg,reg_params[i].value);
-//             printf("%i: Set %s =%08x\n", i, reg_params[i].reg_name,val);
-       }
-
-       exit_breakpoint_size = 4;
-
-/*     arm11->core_state = arm11_algorithm_info->core_state;
-       if (arm11->core_state == ARMV4_5_STATE_ARM)
-                               exit_breakpoint_size = 4;
-       else if (arm11->core_state == ARMV4_5_STATE_THUMB)
-               exit_breakpoint_size = 2;
-       else
-       {
-               LOG_ERROR("BUG: can't execute algorithms when not in ARM or Thumb state");
-               exit(-1);
-       }
-*/
-
-
-/* arm11 at this point only supports ARM not THUMB mode
-   however if this test needs to be reactivated the current state can be read back
-   from CPSR */
-#if 0
-       if (arm11_algorithm_info->core_mode != ARMV4_5_MODE_ANY)
-       {
-               LOG_DEBUG("setting core_mode: 0x%2.2x", arm11_algorithm_info->core_mode);
-               buf_set_u32(arm11->reg_list[ARM11_RC_CPSR].value, 0, 5, arm11_algorithm_info->core_mode);
-               arm11->reg_list[ARM11_RC_CPSR].dirty = 1;
-               arm11->reg_list[ARM11_RC_CPSR].valid = 1;
-       }
-#endif
-
-       if ((retval = breakpoint_add(target, exit_point, exit_breakpoint_size, BKPT_HARD)) != ERROR_OK)
-       {
-               LOG_ERROR("can't add breakpoint to finish algorithm execution");
-               retval = ERROR_TARGET_FAILURE;
-               goto restore;
-       }
-
-       // no debug, otherwise breakpoint is not set
-       CHECK_RETVAL(target_resume(target, 0, entry_point, 1, 0));
-
-       CHECK_RETVAL(target_wait_state(target, TARGET_HALTED, timeout_ms));
-
-       if (target->state != TARGET_HALTED)
-       {
-               CHECK_RETVAL(target_halt(target));
-
-               CHECK_RETVAL(target_wait_state(target, TARGET_HALTED, 500));
-
-               retval = ERROR_TARGET_TIMEOUT;
-
-               goto del_breakpoint;
-       }
-
-       if (buf_get_u32(arm11->reg_list[15].value, 0, 32) != exit_point)
-       {
-               LOG_WARNING("target reentered debug state, but not at the desired exit point: 0x%4.4" PRIx32 "",
-                       buf_get_u32(arm11->reg_list[15].value, 0, 32));
-               retval = ERROR_TARGET_TIMEOUT;
-               goto del_breakpoint;
-       }
-
-       for (int i = 0; i < num_mem_params; i++)
-       {
-               if (mem_params[i].direction != PARAM_OUT)
-                       target_read_buffer(target, mem_params[i].address, mem_params[i].size, mem_params[i].value);
-       }
-
-       for (int i = 0; i < num_reg_params; i++)
-       {
-               if (reg_params[i].direction != PARAM_OUT)
-               {
-                       struct reg *reg = register_get_by_name(arm11->core_cache, reg_params[i].reg_name, 0);
-                       if (!reg)
-                       {
-                               LOG_ERROR("BUG: register '%s' not found", reg_params[i].reg_name);
-                               exit(-1);
-                       }
+       LOG_WARNING("Not implemented: %s", __func__);
 
-                       if (reg->size != reg_params[i].size)
-                       {
-                               LOG_ERROR("BUG: register '%s' size doesn't match reg_params[i].size", reg_params[i].reg_name);
-                               exit(-1);
-                       }
-
-                       buf_set_u32(reg_params[i].value, 0, 32, buf_get_u32(reg->value, 0, 32));
-               }
-       }
-
-del_breakpoint:
-       breakpoint_remove(target, exit_point);
-
-restore:
-       // Restore context
-       for (size_t i = 0; i < 16; i++)
-       {
-               LOG_DEBUG("restoring register %s with value 0x%8.8" PRIx32 "",
-                        arm11->reg_list[i].name, context[i]);
-               arm11_set_reg(&arm11->reg_list[i], (uint8_t*)&context[i]);
-       }
-       LOG_DEBUG("restoring CPSR with value 0x%8.8" PRIx32 "", cpsr);
-       arm11_set_reg(&arm11->reg_list[ARM11_RC_CPSR], (uint8_t*)&cpsr);
-
-//     arm11->core_state = core_state;
-//     arm11->core_mode = core_mode;
-
-       return retval;
+       return ERROR_FAIL;
 }
 
 static int arm11_target_create(struct target *target, Jim_Interp *interp)
 {
-       FNC_INFO;
-
-       NEW(struct arm11_common, arm11, 1);
-
-       arm11->target = target;
+       struct arm11_common *arm11;
 
        if (target->tap == NULL)
                return ERROR_FAIL;
@@ -1799,8 +1222,14 @@ static int arm11_target_create(struct target *target, Jim_Interp *interp)
                return ERROR_COMMAND_SYNTAX_ERROR;
        }
 
+       arm11 = calloc(1, sizeof *arm11);
+       if (!arm11)
+               return ERROR_FAIL;
+
        armv4_5_init_arch_info(target, &arm11->arm);
 
+       arm11->target = target;
+
        arm11->jtag_info.tap = target->tap;
        arm11->jtag_info.scann_size = 5;
        arm11->jtag_info.scann_instr = ARM11_SCAN_N;
@@ -1814,6 +1243,11 @@ static int arm11_init_target(struct command_context *cmd_ctx,
                struct target *target)
 {
        /* Initialize anything we can set up without talking to the target */
+
+       /* REVISIT do we really want such a debug-registers-only cache?
+        * If we do, it should probably be handled purely by the DPM code,
+        * so it works identically on the v7a/v7r cores.
+        */
        return arm11_build_reg_cache(target);
 }
 
@@ -1821,9 +1255,12 @@ static int arm11_init_target(struct command_context *cmd_ctx,
 static int arm11_examine(struct target *target)
 {
        int retval;
-
-       FNC_INFO;
+       char *type;
        struct arm11_common *arm11 = target_to_arm11(target);
+       uint32_t didr, device_id;
+       uint8_t implementor;
+
+       /* FIXME split into do-first-time and do-every-time logic ... */
 
        /* check IDCODE */
 
@@ -1831,7 +1268,7 @@ static int arm11_examine(struct target *target)
 
        struct scan_field               idcode_field;
 
-       arm11_setup_field(arm11, 32, NULL, &arm11->device_id, &idcode_field);
+       arm11_setup_field(arm11, 32, NULL, &device_id, &idcode_field);
 
        arm11_add_dr_scan_vc(1, &idcode_field, TAP_DRPAUSE);
 
@@ -1843,43 +1280,50 @@ static int arm11_examine(struct target *target)
 
        struct scan_field               chain0_fields[2];
 
-       arm11_setup_field(arm11, 32, NULL,      &arm11->didr,           chain0_fields + 0);
-       arm11_setup_field(arm11,  8, NULL,      &arm11->implementor,    chain0_fields + 1);
+       arm11_setup_field(arm11, 32, NULL, &didr, chain0_fields + 0);
+       arm11_setup_field(arm11,  8, NULL, &implementor, chain0_fields + 1);
 
-       arm11_add_dr_scan_vc(asizeof(chain0_fields), chain0_fields, TAP_IDLE);
+       arm11_add_dr_scan_vc(ARRAY_SIZE(chain0_fields), chain0_fields, TAP_IDLE);
 
        CHECK_RETVAL(jtag_execute_queue());
 
-       switch (arm11->device_id & 0x0FFFF000)
+       switch (device_id & 0x0FFFF000)
        {
-       case 0x07B36000:        LOG_INFO("found ARM1136"); break;
-       case 0x07B56000:        LOG_INFO("found ARM1156"); break;
-       case 0x07B76000:        LOG_INFO("found ARM1176"); break;
+       case 0x07B36000:
+               type = "ARM1136";
+               break;
+       case 0x07B56000:
+               type = "ARM1156";
+               break;
+       case 0x07B76000:
+               arm11->arm.core_type = ARM_MODE_MON;
+               type = "ARM1176";
+               break;
        default:
                LOG_ERROR("'target arm11' expects IDCODE 0x*7B*7****");
                return ERROR_FAIL;
        }
+       LOG_INFO("found %s", type);
 
-       arm11->debug_version = (arm11->didr >> 16) & 0x0F;
-
-       if (arm11->debug_version != ARM11_DEBUG_V6 &&
-               arm11->debug_version != ARM11_DEBUG_V61)
-       {
-               LOG_ERROR("Only ARMv6 v6 and v6.1 architectures supported.");
+       /* unlikely this could ever fail, but ... */
+       switch ((didr >> 16) & 0x0F) {
+       case ARM11_DEBUG_V6:
+       case ARM11_DEBUG_V61:           /* supports security extensions */
+               break;
+       default:
+               LOG_ERROR("Only ARM v6 and v6.1 debug supported.");
                return ERROR_FAIL;
        }
 
-       arm11->brp      = ((arm11->didr >> 24) & 0x0F) + 1;
-       arm11->wrp      = ((arm11->didr >> 28) & 0x0F) + 1;
+       arm11->brp = ((didr >> 24) & 0x0F) + 1;
+       arm11->wrp = ((didr >> 28) & 0x0F) + 1;
 
        /** \todo TODO: reserve one brp slot if we allow breakpoints during step */
        arm11->free_brps = arm11->brp;
        arm11->free_wrps = arm11->wrp;
 
-       LOG_DEBUG("IDCODE %08" PRIx32 " IMPLEMENTOR %02x DIDR %08" PRIx32 "",
-               arm11->device_id,
-               (int)(arm11->implementor),
-               arm11->didr);
+       LOG_DEBUG("IDCODE %08" PRIx32 " IMPLEMENTOR %02x DIDR %08" PRIx32,
+                       device_id, implementor, didr);
 
        /* as a side-effect this reads DSCR and thus
         * clears the ARM11_DSCR_STICKY_PRECISE_DATA_ABORT / Sticky Precise Data Abort Flag
@@ -1890,6 +1334,14 @@ static int arm11_examine(struct target *target)
        if (retval != ERROR_OK)
                return retval;
 
+       /* Build register cache "late", after target_init(), since we
+        * want to know if this core supports Secure Monitor mode.
+        */
+       if (!target_was_examined(target)) {
+               arm11_dpm_init(arm11, didr);
+               retval = arm_dpm_setup(&arm11->dpm);
+       }
+
        /* ETM on ARM11 still uses original scanchain 6 access mode */
        if (arm11->arm.etm && !target_was_examined(target)) {
                *register_get_last_cache_p(&target->reg_cache) =
@@ -1907,8 +1359,6 @@ static int arm11_examine(struct target *target)
 /** Load a register that is marked !valid in the register cache */
 static int arm11_get_reg(struct reg *reg)
 {
-       FNC_INFO;
-
        struct target * target = ((struct arm11_reg_state *)reg->arch_info)->target;
 
        if (target->state != TARGET_HALTED)
@@ -1930,8 +1380,6 @@ static int arm11_get_reg(struct reg *reg)
 /** Change a value in the register cache */
 static int arm11_set_reg(struct reg *reg, uint8_t *buf)
 {
-       FNC_INFO;
-
        struct target *target = ((struct arm11_reg_state *)reg->arch_info)->target;
        struct arm11_common *arm11 = target_to_arm11(target);
 //     const struct arm11_reg_defs *arm11_reg_info = arm11_reg_defs + ((struct arm11_reg_state *)reg->arch_info)->def_index;
@@ -1943,25 +1391,33 @@ static int arm11_set_reg(struct reg *reg, uint8_t *buf)
        return ERROR_OK;
 }
 
+static const struct reg_arch_type arm11_reg_type = {
+       .get = arm11_get_reg,
+       .set = arm11_set_reg,
+};
+
 static int arm11_build_reg_cache(struct target *target)
 {
        struct arm11_common *arm11 = target_to_arm11(target);
-
-       NEW(struct reg_cache,           cache,                          1);
-       NEW(struct reg,                         reg_list,                       ARM11_REGCACHE_COUNT);
-       NEW(struct arm11_reg_state,     arm11_reg_states,       ARM11_REGCACHE_COUNT);
-
-       if (arm11_regs_arch_type == -1)
-               arm11_regs_arch_type = register_reg_arch_type(arm11_get_reg, arm11_set_reg);
-
-       register_init_dummy(&arm11_gdb_dummy_fp_reg);
-       register_init_dummy(&arm11_gdb_dummy_fps_reg);
+       struct reg_cache *cache;
+       struct reg *reg_list;
+       struct arm11_reg_state *arm11_reg_states;
+
+       cache = calloc(1, sizeof *cache);
+       reg_list = calloc(ARM11_REGCACHE_COUNT, sizeof *reg_list);
+       arm11_reg_states = calloc(ARM11_REGCACHE_COUNT,
+                       sizeof *arm11_reg_states);
+       if (!cache || !reg_list || !arm11_reg_states) {
+               free(cache);
+               free(reg_list);
+               free(arm11_reg_states);
+               return ERROR_FAIL;
+       }
 
        arm11->reg_list = reg_list;
 
-       /* Build the process context cache */
-       cache->name             = "arm11 registers";
-       cache->next             = NULL;
+       /* build cache for some of the debug registers */
+       cache->name = "arm11 debug registers";
        cache->reg_list = reg_list;
        cache->num_regs = ARM11_REGCACHE_COUNT;
 
@@ -1969,16 +1425,22 @@ static int arm11_build_reg_cache(struct target *target)
        (*cache_p) = cache;
 
        arm11->core_cache = cache;
-//       armv7m->process_context = cache;
 
        size_t i;
 
        /* Not very elegant assertion */
-       if (ARM11_REGCACHE_COUNT != asizeof(arm11->reg_values) ||
-               ARM11_REGCACHE_COUNT != asizeof(arm11_reg_defs) ||
+       if (ARM11_REGCACHE_COUNT != ARRAY_SIZE(arm11->reg_values) ||
+               ARM11_REGCACHE_COUNT != ARRAY_SIZE(arm11_reg_defs) ||
                ARM11_REGCACHE_COUNT != ARM11_RC_MAX)
        {
-               LOG_ERROR("BUG: arm11->reg_values inconsistent (%d " ZU " " ZU " %d)", ARM11_REGCACHE_COUNT, asizeof(arm11->reg_values), asizeof(arm11_reg_defs), ARM11_RC_MAX);
+               LOG_ERROR("BUG: arm11->reg_values inconsistent (%d %u %u %d)",
+                               ARM11_REGCACHE_COUNT,
+                               (unsigned) ARRAY_SIZE(arm11->reg_values),
+                               (unsigned) ARRAY_SIZE(arm11_reg_defs),
+                               ARM11_RC_MAX);
+               /* FIXME minimally, use a build_bug_on(X) mechanism;
+                * runtime exit() here is bad!
+                */
                exit(-1);
        }
 
@@ -1993,7 +1455,7 @@ static int arm11_build_reg_cache(struct target *target)
                r->value                        = (uint8_t *)(arm11->reg_values + i);
                r->dirty                        = 0;
                r->valid                        = 0;
-               r->arch_type            = arm11_regs_arch_type;
+               r->type = &arm11_reg_type;
                r->arch_info            = rs;
 
                rs->def_index           = i;
@@ -2003,60 +1465,32 @@ static int arm11_build_reg_cache(struct target *target)
        return ERROR_OK;
 }
 
-static COMMAND_HELPER(arm11_handle_bool, bool *var, char *name)
-{
-       if (argc == 0)
-       {
-               LOG_INFO("%s is %s.", name, *var ? "enabled" : "disabled");
-               return ERROR_OK;
-       }
-
-       if (argc != 1)
-               return ERROR_COMMAND_SYNTAX_ERROR;
-
-       switch (args[0][0])
-       {
-       case '0':       /* 0 */
-       case 'f':       /* false */
-       case 'F':
-       case 'd':       /* disable */
-       case 'D':
-               *var = false;
-               break;
-
-       case '1':       /* 1 */
-       case 't':       /* true */
-       case 'T':
-       case 'e':       /* enable */
-       case 'E':
-               *var = true;
-               break;
-       }
-
-       LOG_INFO("%s %s.", *var ? "Enabled" : "Disabled", name);
-
-       return ERROR_OK;
-}
+/* FIXME all these BOOL_WRAPPER things should be modifying
+ * per-instance state, not shared state; ditto the vector
+ * catch register support.  Scan chains with multiple cores
+ * should be able to say "work with this core like this,
+ * that core like that".  Example, ARM11 MPCore ...
+ */
 
-#define BOOL_WRAPPER(name, print_name) \
-COMMAND_HANDLER(arm11_handle_bool_##name) \
-{ \
-       return CALL_COMMAND_HANDLER(arm11_handle_bool, \
-                       &arm11_config_##name, print_name); \
-}
+#define ARM11_BOOL_WRAPPER(name, print_name)   \
+               COMMAND_HANDLER(arm11_handle_bool_##name) \
+               { \
+                       return CALL_COMMAND_HANDLER(handle_command_parse_bool, \
+                                       &arm11_config_##name, print_name); \
+               }
 
-BOOL_WRAPPER(memwrite_burst,                   "memory write burst mode")
-BOOL_WRAPPER(memwrite_error_fatal,             "fatal error mode for memory writes")
-BOOL_WRAPPER(step_irq_enable,                  "IRQs while stepping")
-BOOL_WRAPPER(hardware_step,                    "hardware single step")
+ARM11_BOOL_WRAPPER(memwrite_burst, "memory write burst mode")
+ARM11_BOOL_WRAPPER(memwrite_error_fatal, "fatal error mode for memory writes")
+ARM11_BOOL_WRAPPER(step_irq_enable, "IRQs while stepping")
+ARM11_BOOL_WRAPPER(hardware_step, "hardware single step")
 
 COMMAND_HANDLER(arm11_handle_vcr)
 {
-       switch (argc) {
+       switch (CMD_ARGC) {
        case 0:
                break;
        case 1:
-               COMMAND_PARSE_NUMBER(u32, args[0], arm11_vcr);
+               COMMAND_PARSE_NUMBER(u32, CMD_ARGV[0], arm11_vcr);
                break;
        default:
                return ERROR_COMMAND_SYNTAX_ERROR;
@@ -2133,38 +1567,38 @@ static int arm11_mcr(struct target *target, int cpnum,
 
 static int arm11_register_commands(struct command_context *cmd_ctx)
 {
-       FNC_INFO;
-
        struct command *top_cmd, *mw_cmd;
 
-       top_cmd = register_command(cmd_ctx, NULL, "arm11",
+       armv4_5_register_commands(cmd_ctx);
+
+       top_cmd = COMMAND_REGISTER(cmd_ctx, NULL, "arm11",
                        NULL, COMMAND_ANY, NULL);
 
        /* "hardware_step" is only here to check if the default
         * simulate + breakpoint implementation is broken.
         * TEMPORARY! NOT DOCUMENTED!
         */
-       register_command(cmd_ctx, top_cmd, "hardware_step",
+       COMMAND_REGISTER(cmd_ctx, top_cmd, "hardware_step",
                        arm11_handle_bool_hardware_step, COMMAND_ANY,
                        "DEBUG ONLY - Hardware single stepping"
                                " (default: disabled)");
 
-       mw_cmd = register_command(cmd_ctx, top_cmd, "memwrite",
+       mw_cmd = COMMAND_REGISTER(cmd_ctx, top_cmd, "memwrite",
                        NULL, COMMAND_ANY, NULL);
-       register_command(cmd_ctx, mw_cmd, "burst",
+       COMMAND_REGISTER(cmd_ctx, mw_cmd, "burst",
                        arm11_handle_bool_memwrite_burst, COMMAND_ANY,
                        "Enable/Disable non-standard but fast burst mode"
                                " (default: enabled)");
-       register_command(cmd_ctx, mw_cmd, "error_fatal",
+       COMMAND_REGISTER(cmd_ctx, mw_cmd, "error_fatal",
                        arm11_handle_bool_memwrite_error_fatal, COMMAND_ANY,
                        "Terminate program if transfer error was found"
                                " (default: enabled)");
 
-       register_command(cmd_ctx, top_cmd, "step_irq_enable",
+       COMMAND_REGISTER(cmd_ctx, top_cmd, "step_irq_enable",
                        arm11_handle_bool_step_irq_enable, COMMAND_ANY,
                        "Enable interrupts while stepping"
                                " (default: disabled)");
-       register_command(cmd_ctx, top_cmd, "vcr",
+       COMMAND_REGISTER(cmd_ctx, top_cmd, "vcr",
                        arm11_handle_vcr, COMMAND_ANY,
                        "Control (Interrupt) Vector Catch Register");
 
@@ -2188,7 +1622,7 @@ struct target_type arm11_target = {
        .deassert_reset =       arm11_deassert_reset,
        .soft_reset_halt =      arm11_soft_reset_halt,
 
-       .get_gdb_reg_list =     arm11_get_gdb_reg_list,
+       .get_gdb_reg_list =     armv4_5_get_gdb_reg_list,
 
        .read_memory =          arm11_read_memory,
        .write_memory =         arm11_write_memory,
@@ -2203,7 +1637,7 @@ struct target_type arm11_target = {
        .add_watchpoint =       arm11_add_watchpoint,
        .remove_watchpoint =    arm11_remove_watchpoint,
 
-       .run_algorithm =        arm11_run_algorithm,
+       .run_algorithm =        armv4_5_run_algorithm,
 
        .register_commands =    arm11_register_commands,
        .target_create =        arm11_target_create,