reg_t -> struct reg
[fw/openocd] / src / target / cortex_m3.c
index 51481a98873d0bb3eff42aa88ce586a2d759d6e2..58c3d8f71d4a0b8aaa2a22109d73c279d549cb67 100644 (file)
 #include "arm_disassembler.h"
 
 
+/* NOTE:  most of this should work fine for the Cortex-M1 and
+ * Cortex-M0 cores too, although they're ARMv6-M not ARMv7-M.
+ */
+
 #define ARRAY_SIZE(x)  ((int)(sizeof(x)/sizeof((x)[0])))
 
 
 /* forward declarations */
-static int cortex_m3_set_breakpoint(struct target_s *target, breakpoint_t *breakpoint);
-static int cortex_m3_unset_breakpoint(struct target_s *target, breakpoint_t *breakpoint);
+static int cortex_m3_set_breakpoint(struct target_s *target, struct breakpoint *breakpoint);
+static int cortex_m3_unset_breakpoint(struct target_s *target, struct breakpoint *breakpoint);
 static void cortex_m3_enable_watchpoints(struct target_s *target);
 static int cortex_m3_store_core_reg_u32(target_t *target,
                enum armv7m_regtype type, uint32_t num, uint32_t value);
 
 #ifdef ARMV7_GDB_HACKS
 extern uint8_t armv7m_gdb_dummy_cpsr_value[];
-extern reg_t armv7m_gdb_dummy_cpsr_reg;
+extern struct reg armv7m_gdb_dummy_cpsr_reg;
 #endif
 
-static int cortex_m3_has_mmu(struct target_s *target, bool *has_mmu)
-{
-       *has_mmu = false;
-       return ERROR_OK;
-}
-
-static int cortexm3_dap_read_coreregister_u32(swjdp_common_t *swjdp,
+static int cortexm3_dap_read_coreregister_u32(struct swjdp_common *swjdp,
                uint32_t *value, int regnum)
 {
        int retval;
@@ -89,7 +87,7 @@ static int cortexm3_dap_read_coreregister_u32(swjdp_common_t *swjdp,
        return retval;
 }
 
-static int cortexm3_dap_write_coreregister_u32(swjdp_common_t *swjdp,
+static int cortexm3_dap_write_coreregister_u32(struct swjdp_common *swjdp,
                uint32_t value, int regnum)
 {
        int retval;
@@ -123,10 +121,8 @@ static int cortexm3_dap_write_coreregister_u32(swjdp_common_t *swjdp,
 static int cortex_m3_write_debug_halt_mask(target_t *target,
                uint32_t mask_on, uint32_t mask_off)
 {
-       /* get pointers to arch-specific information */
-       armv7m_common_t *armv7m = target->arch_info;
-       cortex_m3_common_t *cortex_m3 = armv7m->arch_info;
-       swjdp_common_t *swjdp = &armv7m->swjdp_info;
+       struct cortex_m3_common *cortex_m3 = target_to_cm3(target);
+       struct swjdp_common *swjdp = &cortex_m3->armv7m.swjdp_info;
 
        /* mask off status bits */
        cortex_m3->dcb_dhcsr &= ~((0xFFFF << 16) | mask_off);
@@ -138,10 +134,8 @@ static int cortex_m3_write_debug_halt_mask(target_t *target,
 
 static int cortex_m3_clear_halt(target_t *target)
 {
-       /* get pointers to arch-specific information */
-       armv7m_common_t *armv7m = target->arch_info;
-       cortex_m3_common_t *cortex_m3 = armv7m->arch_info;
-       swjdp_common_t *swjdp = &armv7m->swjdp_info;
+       struct cortex_m3_common *cortex_m3 = target_to_cm3(target);
+       struct swjdp_common *swjdp = &cortex_m3->armv7m.swjdp_info;
 
        /* clear step if any */
        cortex_m3_write_debug_halt_mask(target, C_HALT, C_STEP);
@@ -157,10 +151,8 @@ static int cortex_m3_clear_halt(target_t *target)
 
 static int cortex_m3_single_step_core(target_t *target)
 {
-       /* get pointers to arch-specific information */
-       armv7m_common_t *armv7m = target->arch_info;
-       cortex_m3_common_t *cortex_m3 = armv7m->arch_info;
-       swjdp_common_t *swjdp = &armv7m->swjdp_info;
+       struct cortex_m3_common *cortex_m3 = target_to_cm3(target);
+       struct swjdp_common *swjdp = &cortex_m3->armv7m.swjdp_info;
        uint32_t dhcsr_save;
 
        /* backup dhcsr reg */
@@ -183,13 +175,10 @@ static int cortex_m3_endreset_event(target_t *target)
 {
        int i;
        uint32_t dcb_demcr;
-
-       /* get pointers to arch-specific information */
-       armv7m_common_t *armv7m = target->arch_info;
-       cortex_m3_common_t *cortex_m3 = armv7m->arch_info;
-       swjdp_common_t *swjdp = &armv7m->swjdp_info;
-       cortex_m3_fp_comparator_t *fp_list = cortex_m3->fp_comparator_list;
-       cortex_m3_dwt_comparator_t *dwt_list = cortex_m3->dwt_comparator_list;
+       struct cortex_m3_common *cortex_m3 = target_to_cm3(target);
+       struct swjdp_common *swjdp = &cortex_m3->armv7m.swjdp_info;
+       struct cortex_m3_fp_comparator *fp_list = cortex_m3->fp_comparator_list;
+       struct cortex_m3_dwt_comparator *dwt_list = cortex_m3->dwt_comparator_list;
 
        mem_ap_read_atomic_u32(swjdp, DCB_DEMCR, &dcb_demcr);
        LOG_DEBUG("DCB_DEMCR = 0x%8.8" PRIx32 "",dcb_demcr);
@@ -242,9 +231,7 @@ static int cortex_m3_endreset_event(target_t *target)
 
 static int cortex_m3_examine_debug_reason(target_t *target)
 {
-       /* get pointers to arch-specific information */
-       armv7m_common_t *armv7m = target->arch_info;
-       cortex_m3_common_t *cortex_m3 = armv7m->arch_info;
+       struct cortex_m3_common *cortex_m3 = target_to_cm3(target);
 
        /* THIS IS NOT GOOD, TODO - better logic for detection of debug state reason */
        /* only check the debug reason if we don't know it already */
@@ -272,10 +259,8 @@ static int cortex_m3_examine_debug_reason(target_t *target)
 static int cortex_m3_examine_exception_reason(target_t *target)
 {
        uint32_t shcsr, except_sr, cfsr = -1, except_ar = -1;
-
-       /* get pointers to arch-specific information */
-       armv7m_common_t *armv7m = target->arch_info;
-       swjdp_common_t *swjdp = &armv7m->swjdp_info;
+       struct armv7m_common *armv7m = target_to_armv7m(target);
+       struct swjdp_common *swjdp = &armv7m->swjdp_info;
 
        mem_ap_read_u32(swjdp, NVIC_SHCSR, &shcsr);
        switch (armv7m->exception_number)
@@ -324,11 +309,9 @@ static int cortex_m3_debug_entry(target_t *target)
        int i;
        uint32_t xPSR;
        int retval;
-
-       /* get pointers to arch-specific information */
-       armv7m_common_t *armv7m = target->arch_info;
-       cortex_m3_common_t *cortex_m3 = armv7m->arch_info;
-       swjdp_common_t *swjdp = &armv7m->swjdp_info;
+       struct cortex_m3_common *cortex_m3 = target_to_cm3(target);
+       struct armv7m_common *armv7m = &cortex_m3->armv7m;
+       struct swjdp_common *swjdp = &armv7m->swjdp_info;
 
        LOG_DEBUG(" ");
 
@@ -397,11 +380,8 @@ static int cortex_m3_poll(target_t *target)
 {
        int retval;
        enum target_state prev_target_state = target->state;
-
-       /* get pointers to arch-specific information */
-       armv7m_common_t *armv7m = target->arch_info;
-       cortex_m3_common_t *cortex_m3 = armv7m->arch_info;
-       swjdp_common_t *swjdp = &armv7m->swjdp_info;
+       struct cortex_m3_common *cortex_m3 = target_to_cm3(target);
+       struct swjdp_common *swjdp = &cortex_m3->armv7m.swjdp_info;
 
        /* Read from Debug Halting Control and Status Register */
        retval = mem_ap_read_atomic_u32(swjdp, DCB_DHCSR, &cortex_m3->dcb_dhcsr);
@@ -514,10 +494,8 @@ static int cortex_m3_halt(target_t *target)
 
 static int cortex_m3_soft_reset_halt(struct target_s *target)
 {
-       /* get pointers to arch-specific information */
-       armv7m_common_t *armv7m = target->arch_info;
-       cortex_m3_common_t *cortex_m3 = armv7m->arch_info;
-       swjdp_common_t *swjdp = &armv7m->swjdp_info;
+       struct cortex_m3_common *cortex_m3 = target_to_cm3(target);
+       struct swjdp_common *swjdp = &cortex_m3->armv7m.swjdp_info;
        uint32_t dcb_dhcsr = 0;
        int retval, timeout = 0;
 
@@ -555,7 +533,7 @@ static int cortex_m3_soft_reset_halt(struct target_s *target)
 
 static void cortex_m3_enable_breakpoints(struct target_s *target)
 {
-       breakpoint_t *breakpoint = target->breakpoints;
+       struct breakpoint *breakpoint = target->breakpoints;
 
        /* set any pending breakpoints */
        while (breakpoint)
@@ -569,9 +547,8 @@ static void cortex_m3_enable_breakpoints(struct target_s *target)
 static int cortex_m3_resume(struct target_s *target, int current,
                uint32_t address, int handle_breakpoints, int debug_execution)
 {
-       /* get pointers to arch-specific information */
-       armv7m_common_t *armv7m = target->arch_info;
-       breakpoint_t *breakpoint = NULL;
+       struct armv7m_common *armv7m = target_to_armv7m(target);
+       struct breakpoint *breakpoint = NULL;
        uint32_t resume_pc;
 
        if (target->state != TARGET_HALTED)
@@ -658,11 +635,10 @@ static int cortex_m3_resume(struct target_s *target, int current,
 static int cortex_m3_step(struct target_s *target, int current,
                uint32_t address, int handle_breakpoints)
 {
-       /* get pointers to arch-specific information */
-       armv7m_common_t *armv7m = target->arch_info;
-       cortex_m3_common_t *cortex_m3 = armv7m->arch_info;
-       swjdp_common_t *swjdp = &armv7m->swjdp_info;
-       breakpoint_t *breakpoint = NULL;
+       struct cortex_m3_common *cortex_m3 = target_to_cm3(target);
+       struct armv7m_common *armv7m = &cortex_m3->armv7m;
+       struct swjdp_common *swjdp = &armv7m->swjdp_info;
+       struct breakpoint *breakpoint = NULL;
 
        if (target->state != TARGET_HALTED)
        {
@@ -672,12 +648,16 @@ static int cortex_m3_step(struct target_s *target, int current,
 
        /* current = 1: continue on current pc, otherwise continue at <address> */
        if (!current)
-               buf_set_u32(armv7m->core_cache->reg_list[15].value, 0, 32, address);
+               buf_set_u32(cortex_m3->armv7m.core_cache->reg_list[15].value,
+                               0, 32, address);
 
        /* the front-end may request us not to handle breakpoints */
-       if (handle_breakpoints)
-               if ((breakpoint = breakpoint_find(target, buf_get_u32(armv7m->core_cache->reg_list[15].value, 0, 32))))
+       if (handle_breakpoints) {
+               breakpoint = breakpoint_find(target, buf_get_u32(armv7m
+                               ->core_cache->reg_list[15].value, 0, 32));
+               if (breakpoint)
                        cortex_m3_unset_breakpoint(target, breakpoint);
+       }
 
        target->debug_reason = DBG_REASON_SINGLESTEP;
 
@@ -706,9 +686,8 @@ static int cortex_m3_step(struct target_s *target, int current,
 
 static int cortex_m3_assert_reset(target_t *target)
 {
-       armv7m_common_t *armv7m = target->arch_info;
-       cortex_m3_common_t *cortex_m3 = armv7m->arch_info;
-       swjdp_common_t *swjdp = &armv7m->swjdp_info;
+       struct cortex_m3_common *cortex_m3 = target_to_cm3(target);
+       struct swjdp_common *swjdp = &cortex_m3->armv7m.swjdp_info;
        int assert_srst = 1;
 
        LOG_DEBUG("target->state: %s",
@@ -854,17 +833,13 @@ static int cortex_m3_deassert_reset(target_t *target)
 }
 
 static int
-cortex_m3_set_breakpoint(struct target_s *target, breakpoint_t *breakpoint)
+cortex_m3_set_breakpoint(struct target_s *target, struct breakpoint *breakpoint)
 {
        int retval;
        int fp_num = 0;
        uint32_t hilo;
-
-       /* get pointers to arch-specific information */
-       armv7m_common_t *armv7m = target->arch_info;
-       cortex_m3_common_t *cortex_m3 = armv7m->arch_info;
-
-       cortex_m3_fp_comparator_t * comparator_list = cortex_m3->fp_comparator_list;
+       struct cortex_m3_common *cortex_m3 = target_to_cm3(target);
+       struct cortex_m3_fp_comparator *comparator_list = cortex_m3->fp_comparator_list;
 
        if (breakpoint->set)
        {
@@ -925,13 +900,11 @@ cortex_m3_set_breakpoint(struct target_s *target, breakpoint_t *breakpoint)
 }
 
 static int
-cortex_m3_unset_breakpoint(struct target_s *target, breakpoint_t *breakpoint)
+cortex_m3_unset_breakpoint(struct target_s *target, struct breakpoint *breakpoint)
 {
        int retval;
-       /* get pointers to arch-specific information */
-       armv7m_common_t *armv7m = target->arch_info;
-       cortex_m3_common_t *cortex_m3 = armv7m->arch_info;
-       cortex_m3_fp_comparator_t * comparator_list = cortex_m3->fp_comparator_list;
+       struct cortex_m3_common *cortex_m3 = target_to_cm3(target);
+       struct cortex_m3_fp_comparator * comparator_list = cortex_m3->fp_comparator_list;
 
        if (!breakpoint->set)
        {
@@ -982,11 +955,9 @@ cortex_m3_unset_breakpoint(struct target_s *target, breakpoint_t *breakpoint)
 }
 
 static int
-cortex_m3_add_breakpoint(struct target_s *target, breakpoint_t *breakpoint)
+cortex_m3_add_breakpoint(struct target_s *target, struct breakpoint *breakpoint)
 {
-       /* get pointers to arch-specific information */
-       armv7m_common_t *armv7m = target->arch_info;
-       cortex_m3_common_t *cortex_m3 = armv7m->arch_info;
+       struct cortex_m3_common *cortex_m3 = target_to_cm3(target);
 
        if (cortex_m3->auto_bp_type)
        {
@@ -1033,11 +1004,9 @@ cortex_m3_add_breakpoint(struct target_s *target, breakpoint_t *breakpoint)
 }
 
 static int
-cortex_m3_remove_breakpoint(struct target_s *target, breakpoint_t *breakpoint)
+cortex_m3_remove_breakpoint(struct target_s *target, struct breakpoint *breakpoint)
 {
-       /* get pointers to arch-specific information */
-       armv7m_common_t *armv7m = target->arch_info;
-       cortex_m3_common_t *cortex_m3 = armv7m->arch_info;
+       struct cortex_m3_common *cortex_m3 = target_to_cm3(target);
 
        /* REVISIT why check? FBP can be updated with core running ... */
        if (target->state != TARGET_HALTED)
@@ -1063,14 +1032,11 @@ cortex_m3_remove_breakpoint(struct target_s *target, breakpoint_t *breakpoint)
 }
 
 static int
-cortex_m3_set_watchpoint(struct target_s *target, watchpoint_t *watchpoint)
+cortex_m3_set_watchpoint(struct target_s *target, struct watchpoint *watchpoint)
 {
        int dwt_num = 0;
        uint32_t mask, temp;
-
-       /* get pointers to arch-specific information */
-       armv7m_common_t *armv7m = target->arch_info;
-       cortex_m3_common_t *cortex_m3 = armv7m->arch_info;
+       struct cortex_m3_common *cortex_m3 = target_to_cm3(target);
 
        /* watchpoint params were validated earlier */
        mask = 0;
@@ -1086,7 +1052,7 @@ cortex_m3_set_watchpoint(struct target_s *target, watchpoint_t *watchpoint)
         * watchpoint using comparator #1; comparator #0 matching cycle
         * count; send data trace info through ITM and TPIU; etc
         */
-       cortex_m3_dwt_comparator_t *comparator;
+       struct cortex_m3_dwt_comparator *comparator;
 
        for (comparator = cortex_m3->dwt_comparator_list;
                        comparator->used && dwt_num < cortex_m3->dwt_num_comp;
@@ -1131,12 +1097,10 @@ cortex_m3_set_watchpoint(struct target_s *target, watchpoint_t *watchpoint)
 }
 
 static int
-cortex_m3_unset_watchpoint(struct target_s *target, watchpoint_t *watchpoint)
+cortex_m3_unset_watchpoint(struct target_s *target, struct watchpoint *watchpoint)
 {
-       /* get pointers to arch-specific information */
-       armv7m_common_t *armv7m = target->arch_info;
-       cortex_m3_common_t *cortex_m3 = armv7m->arch_info;
-       cortex_m3_dwt_comparator_t *comparator;
+       struct cortex_m3_common *cortex_m3 = target_to_cm3(target);
+       struct cortex_m3_dwt_comparator *comparator;
        int dwt_num;
 
        if (!watchpoint->set)
@@ -1170,11 +1134,9 @@ cortex_m3_unset_watchpoint(struct target_s *target, watchpoint_t *watchpoint)
 }
 
 static int
-cortex_m3_add_watchpoint(struct target_s *target, watchpoint_t *watchpoint)
+cortex_m3_add_watchpoint(struct target_s *target, struct watchpoint *watchpoint)
 {
-       /* get pointers to arch-specific information */
-       armv7m_common_t *armv7m = target->arch_info;
-       cortex_m3_common_t *cortex_m3 = armv7m->arch_info;
+       struct cortex_m3_common *cortex_m3 = target_to_cm3(target);
 
        /* REVISIT why check? DWT can be updated with core running ... */
        if (target->state != TARGET_HALTED)
@@ -1230,11 +1192,9 @@ cortex_m3_add_watchpoint(struct target_s *target, watchpoint_t *watchpoint)
 }
 
 static int
-cortex_m3_remove_watchpoint(struct target_s *target, watchpoint_t *watchpoint)
+cortex_m3_remove_watchpoint(struct target_s *target, struct watchpoint *watchpoint)
 {
-       /* get pointers to arch-specific information */
-       armv7m_common_t *armv7m = target->arch_info;
-       cortex_m3_common_t *cortex_m3 = armv7m->arch_info;
+       struct cortex_m3_common *cortex_m3 = target_to_cm3(target);
 
        /* REVISIT why check? DWT can be updated with core running ... */
        if (target->state != TARGET_HALTED)
@@ -1256,7 +1216,7 @@ cortex_m3_remove_watchpoint(struct target_s *target, watchpoint_t *watchpoint)
 
 static void cortex_m3_enable_watchpoints(struct target_s *target)
 {
-       watchpoint_t *watchpoint = target->watchpoints;
+       struct watchpoint *watchpoint = target->watchpoints;
 
        /* set any pending watchpoints */
        while (watchpoint)
@@ -1271,9 +1231,8 @@ static int cortex_m3_load_core_reg_u32(struct target_s *target,
                enum armv7m_regtype type, uint32_t num, uint32_t * value)
 {
        int retval;
-       /* get pointers to arch-specific information */
-       armv7m_common_t *armv7m = target->arch_info;
-       swjdp_common_t *swjdp = &armv7m->swjdp_info;
+       struct armv7m_common *armv7m = target_to_armv7m(target);
+       struct swjdp_common *swjdp = &armv7m->swjdp_info;
 
        /* NOTE:  we "know" here that the register identifiers used
         * in the v7m header match the Cortex-M3 Debug Core Register
@@ -1336,10 +1295,8 @@ static int cortex_m3_store_core_reg_u32(struct target_s *target,
 {
        int retval;
        uint32_t reg;
-
-       /* get pointers to arch-specific information */
-       armv7m_common_t *armv7m = target->arch_info;
-       swjdp_common_t *swjdp = &armv7m->swjdp_info;
+       struct armv7m_common *armv7m = target_to_armv7m(target);
+       struct swjdp_common *swjdp = &armv7m->swjdp_info;
 
 #ifdef ARMV7_GDB_HACKS
        /* If the LR register is being modified, make sure it will put us
@@ -1413,9 +1370,8 @@ static int cortex_m3_store_core_reg_u32(struct target_s *target,
 static int cortex_m3_read_memory(struct target_s *target, uint32_t address,
                uint32_t size, uint32_t count, uint8_t *buffer)
 {
-       /* get pointers to arch-specific information */
-       armv7m_common_t *armv7m = target->arch_info;
-       swjdp_common_t *swjdp = &armv7m->swjdp_info;
+       struct armv7m_common *armv7m = target_to_armv7m(target);
+       struct swjdp_common *swjdp = &armv7m->swjdp_info;
        int retval;
 
        /* sanitize arguments */
@@ -1446,9 +1402,8 @@ static int cortex_m3_read_memory(struct target_s *target, uint32_t address,
 static int cortex_m3_write_memory(struct target_s *target, uint32_t address,
                uint32_t size, uint32_t count, uint8_t *buffer)
 {
-       /* get pointers to arch-specific information */
-       armv7m_common_t *armv7m = target->arch_info;
-       swjdp_common_t *swjdp = &armv7m->swjdp_info;
+       struct armv7m_common *armv7m = target_to_armv7m(target);
+       struct swjdp_common *swjdp = &armv7m->swjdp_info;
        int retval;
 
        /* sanitize arguments */
@@ -1498,14 +1453,14 @@ struct dwt_reg_state {
        uint32_t        value;  /* scratch/cache */
 };
 
-static int cortex_m3_dwt_get_reg(struct reg_s *reg)
+static int cortex_m3_dwt_get_reg(struct reg *reg)
 {
        struct dwt_reg_state *state = reg->arch_info;
 
        return target_read_u32(state->target, state->addr, &state->value);
 }
 
-static int cortex_m3_dwt_set_reg(struct reg_s *reg, uint8_t *buf)
+static int cortex_m3_dwt_set_reg(struct reg *reg, uint8_t *buf)
 {
        struct dwt_reg_state *state = reg->arch_info;
 
@@ -1540,7 +1495,7 @@ static struct dwt_reg dwt_comp[] = {
 static int dwt_reg_type = -1;
 
 static void
-cortex_m3_dwt_addreg(struct target_s *t, struct reg_s *r, struct dwt_reg *d)
+cortex_m3_dwt_addreg(struct target_s *t, struct reg *r, struct dwt_reg *d)
 {
        struct dwt_reg_state *state;
 
@@ -1558,11 +1513,11 @@ cortex_m3_dwt_addreg(struct target_s *t, struct reg_s *r, struct dwt_reg *d)
 }
 
 static void
-cortex_m3_dwt_setup(cortex_m3_common_t *cm3, struct target_s *target)
+cortex_m3_dwt_setup(struct cortex_m3_common *cm3, struct target_s *target)
 {
        uint32_t dwtcr;
-       struct reg_cache_s *cache;
-       cortex_m3_dwt_comparator_t *comparator;
+       struct reg_cache *cache;
+       struct cortex_m3_dwt_comparator *comparator;
        int reg, i;
 
        target_read_u32(target, DWT_CTRL, &dwtcr);
@@ -1578,7 +1533,7 @@ cortex_m3_dwt_setup(cortex_m3_common_t *cm3, struct target_s *target)
        cm3->dwt_num_comp = (dwtcr >> 28) & 0xF;
        cm3->dwt_comp_available = cm3->dwt_num_comp;
        cm3->dwt_comparator_list = calloc(cm3->dwt_num_comp,
-                       sizeof(cortex_m3_dwt_comparator_t));
+                       sizeof(struct cortex_m3_dwt_comparator));
        if (!cm3->dwt_comparator_list) {
 fail0:
                cm3->dwt_num_comp = 0;
@@ -1617,7 +1572,7 @@ fail1:
        *register_get_last_cache_p(&target->reg_cache) = cache;
        cm3->dwt_cache = cache;
 
-       LOG_INFO("DWT dwtcr 0x%" PRIx32 ", comp %d, watch%s",
+       LOG_DEBUG("DWT dwtcr 0x%" PRIx32 ", comp %d, watch%s",
                        dwtcr, cm3->dwt_num_comp,
                        (dwtcr & (0xf << 24)) ? " only" : "/trigger");
 
@@ -1632,11 +1587,8 @@ static int cortex_m3_examine(struct target_s *target)
        int retval;
        uint32_t cpuid, fpcr;
        int i;
-
-       /* get pointers to arch-specific information */
-       armv7m_common_t *armv7m = target->arch_info;
-       cortex_m3_common_t *cortex_m3 = armv7m->arch_info;
-       swjdp_common_t *swjdp = &armv7m->swjdp_info;
+       struct cortex_m3_common *cortex_m3 = target_to_cm3(target);
+       struct swjdp_common *swjdp = &cortex_m3->armv7m.swjdp_info;
 
        if ((retval = ahbap_debugport_init(swjdp)) != ERROR_OK)
                return retval;
@@ -1662,7 +1614,7 @@ static int cortex_m3_examine(struct target_s *target)
                cortex_m3->fp_num_code = ((fpcr >> 8) & 0x70) | ((fpcr >> 4) & 0xF); /* bits [14:12] and [7:4] */
                cortex_m3->fp_num_lit = (fpcr >> 8) & 0xF;
                cortex_m3->fp_code_available = cortex_m3->fp_num_code;
-               cortex_m3->fp_comparator_list = calloc(cortex_m3->fp_num_code + cortex_m3->fp_num_lit, sizeof(cortex_m3_fp_comparator_t));
+               cortex_m3->fp_comparator_list = calloc(cortex_m3->fp_num_code + cortex_m3->fp_num_lit, sizeof(struct cortex_m3_fp_comparator));
                cortex_m3->fpb_enabled = fpcr & 1;
                for (i = 0; i < cortex_m3->fp_num_code + cortex_m3->fp_num_lit; i++)
                {
@@ -1678,7 +1630,7 @@ static int cortex_m3_examine(struct target_s *target)
        return ERROR_OK;
 }
 
-static int cortex_m3_dcc_read(swjdp_common_t *swjdp, uint8_t *value, uint8_t *ctrl)
+static int cortex_m3_dcc_read(struct swjdp_common *swjdp, uint8_t *value, uint8_t *ctrl)
 {
        uint16_t dcrdr;
 
@@ -1702,8 +1654,8 @@ static int cortex_m3_dcc_read(swjdp_common_t *swjdp, uint8_t *value, uint8_t *ct
 static int cortex_m3_target_request_data(target_t *target,
                uint32_t size, uint8_t *buffer)
 {
-       armv7m_common_t *armv7m = target->arch_info;
-       swjdp_common_t *swjdp = &armv7m->swjdp_info;
+       struct armv7m_common *armv7m = target_to_armv7m(target);
+       struct swjdp_common *swjdp = &armv7m->swjdp_info;
        uint8_t data;
        uint8_t ctrl;
        uint32_t i;
@@ -1722,8 +1674,8 @@ static int cortex_m3_handle_target_request(void *priv)
        target_t *target = priv;
        if (!target_was_examined(target))
                return ERROR_OK;
-       armv7m_common_t *armv7m = target->arch_info;
-       swjdp_common_t *swjdp = &armv7m->swjdp_info;
+       struct armv7m_common *armv7m = target_to_armv7m(target);
+       struct swjdp_common *swjdp = &armv7m->swjdp_info;
 
        if (!target->dbg_msg_enabled)
                return ERROR_OK;
@@ -1756,11 +1708,10 @@ static int cortex_m3_handle_target_request(void *priv)
 }
 
 static int cortex_m3_init_arch_info(target_t *target,
-               cortex_m3_common_t *cortex_m3, jtag_tap_t *tap)
+               struct cortex_m3_common *cortex_m3, struct jtag_tap *tap)
 {
        int retval;
-       armv7m_common_t *armv7m;
-       armv7m = &cortex_m3->armv7m;
+       struct armv7m_common *armv7m = &cortex_m3->armv7m;
 
        armv7m_init_arch_info(target, armv7m);
 
@@ -1775,11 +1726,6 @@ static int cortex_m3_init_arch_info(target_t *target,
        armv7m->swjdp_info.memaccess_tck = 8;
        armv7m->swjdp_info.tar_autoincr_block = (1 << 12);      /* Cortex-M3 has 4096 bytes autoincrement range */
 
-       /* initialize arch-specific breakpoint handling */
-
-       cortex_m3->common_magic = CORTEX_M3_COMMON_MAGIC;
-       cortex_m3->arch_info = NULL;
-
        /* register arch-specific functions */
        armv7m->examine_debug_reason = cortex_m3_examine_debug_reason;
 
@@ -1788,7 +1734,6 @@ static int cortex_m3_init_arch_info(target_t *target,
        armv7m->pre_restore_context = NULL;
        armv7m->post_restore_context = NULL;
 
-       armv7m->arch_info = cortex_m3;
        armv7m->load_core_reg_u32 = cortex_m3_load_core_reg_u32;
        armv7m->store_core_reg_u32 = cortex_m3_store_core_reg_u32;
 
@@ -1804,40 +1749,58 @@ static int cortex_m3_init_arch_info(target_t *target,
 
 static int cortex_m3_target_create(struct target_s *target, Jim_Interp *interp)
 {
-       cortex_m3_common_t *cortex_m3 = calloc(1,sizeof(cortex_m3_common_t));
+       struct cortex_m3_common *cortex_m3 = calloc(1,sizeof(struct cortex_m3_common));
 
+       cortex_m3->common_magic = CORTEX_M3_COMMON_MAGIC;
        cortex_m3_init_arch_info(target, cortex_m3, target->tap);
 
        return ERROR_OK;
 }
 
+/*--------------------------------------------------------------------------*/
+
+static int cortex_m3_verify_pointer(struct command_context_s *cmd_ctx,
+               struct cortex_m3_common *cm3)
+{
+       if (cm3->common_magic != CORTEX_M3_COMMON_MAGIC) {
+               command_print(cmd_ctx, "target is not a Cortex-M3");
+               return ERROR_TARGET_INVALID;
+       }
+       return ERROR_OK;
+}
+
+/*
+ * Only stuff below this line should need to verify that its target
+ * is a Cortex-M3.  Everything else should have indirected through the
+ * cortexm3_target structure, which is only used with CM3 targets.
+ */
+
 /*
  * REVISIT Thumb2 disassembly should work for all ARMv7 cores, as well
  * as at least ARM-1156T2.  The interesting thing about Cortex-M is
  * that *only* Thumb2 disassembly matters.  There are also some small
  * additions to Thumb2 that are specific to ARMv7-M.
  */
-static int
-handle_cortex_m3_disassemble_command(struct command_context_s *cmd_ctx,
-               char *cmd, char **args, int argc)
+COMMAND_HANDLER(handle_cortex_m3_disassemble_command)
 {
-       int retval = ERROR_OK;
+       int retval;
        target_t *target = get_current_target(cmd_ctx);
+       struct cortex_m3_common *cortex_m3 = target_to_cm3(target);
        uint32_t address;
        unsigned long count = 1;
-       arm_instruction_t cur_instruction;
+       struct arm_instruction cur_instruction;
+
+       retval = cortex_m3_verify_pointer(cmd_ctx, cortex_m3);
+       if (retval != ERROR_OK)
+               return retval;
 
        errno = 0;
        switch (argc) {
        case 2:
-               count = strtoul(args[1], NULL, 0);
-               if (errno)
-                       return ERROR_FAIL;
+               COMMAND_PARSE_NUMBER(ulong, args[1], count);
                /* FALL THROUGH */
        case 1:
-               address = strtoul(args[0], NULL, 0);
-               if (errno)
-                       return ERROR_FAIL;
+               COMMAND_PARSE_NUMBER(u32, args[0], address);
                break;
        default:
                command_print(cmd_ctx,
@@ -1870,40 +1833,44 @@ static const struct {
        { "reset",      VC_CORERESET, },
 };
 
-static int
-handle_cortex_m3_vector_catch_command(struct command_context_s *cmd_ctx,
-               char *cmd, char **argv, int argc)
+COMMAND_HANDLER(handle_cortex_m3_vector_catch_command)
 {
        target_t *target = get_current_target(cmd_ctx);
-       armv7m_common_t *armv7m = target->arch_info;
-       swjdp_common_t *swjdp = &armv7m->swjdp_info;
+       struct cortex_m3_common *cortex_m3 = target_to_cm3(target);
+       struct armv7m_common *armv7m = &cortex_m3->armv7m;
+       struct swjdp_common *swjdp = &armv7m->swjdp_info;
        uint32_t demcr = 0;
+       int retval;
        int i;
 
+       retval = cortex_m3_verify_pointer(cmd_ctx, cortex_m3);
+       if (retval != ERROR_OK)
+               return retval;
+
        mem_ap_read_atomic_u32(swjdp, DCB_DEMCR, &demcr);
 
        if (argc > 0) {
                unsigned catch = 0;
 
                if (argc == 1) {
-                       if (strcmp(argv[0], "all") == 0) {
+                       if (strcmp(args[0], "all") == 0) {
                                catch = VC_HARDERR | VC_INTERR | VC_BUSERR
                                        | VC_STATERR | VC_CHKERR | VC_NOCPERR
                                        | VC_MMERR | VC_CORERESET;
                                goto write;
-                       } else if (strcmp(argv[0], "none") == 0) {
+                       } else if (strcmp(args[0], "none") == 0) {
                                goto write;
                        }
                }
                while (argc-- > 0) {
                        for (i = 0; i < ARRAY_SIZE(vec_ids); i++) {
-                               if (strcmp(argv[argc], vec_ids[i].name) != 0)
+                               if (strcmp(args[argc], vec_ids[i].name) != 0)
                                        continue;
                                catch |= vec_ids[i].mask;
                                break;
                        }
                        if (i == ARRAY_SIZE(vec_ids)) {
-                               LOG_ERROR("No CM3 vector '%s'", argv[argc]);
+                               LOG_ERROR("No CM3 vector '%s'", args[argc]);
                                return ERROR_INVALID_ARGUMENTS;
                        }
                }
@@ -1923,17 +1890,19 @@ write:
        return ERROR_OK;
 }
 
-static int
-handle_cortex_m3_mask_interrupts_command(struct command_context_s *cmd_ctx,
-               char *cmd, char **args, int argc)
+COMMAND_HANDLER(handle_cortex_m3_mask_interrupts_command)
 {
        target_t *target = get_current_target(cmd_ctx);
-       armv7m_common_t *armv7m = target->arch_info;
-       cortex_m3_common_t *cortex_m3 = armv7m->arch_info;
+       struct cortex_m3_common *cortex_m3 = target_to_cm3(target);
+       int retval;
+
+       retval = cortex_m3_verify_pointer(cmd_ctx, cortex_m3);
+       if (retval != ERROR_OK)
+               return retval;
 
        if (target->state != TARGET_HALTED)
        {
-               command_print(cmd_ctx, "target must be stopped for \"%s\" command", cmd);
+               command_print(cmd_ctx, "target must be stopped for \"%s\" command", CMD_NAME);
                return ERROR_OK;
        }
 
@@ -1982,7 +1951,7 @@ static int cortex_m3_register_commands(struct command_context_s *cmd_ctx)
        return retval;
 }
 
-target_type_t cortexm3_target =
+struct target_type cortexm3_target =
 {
        .name = "cortex_m3",
 
@@ -2017,7 +1986,5 @@ target_type_t cortexm3_target =
        .register_commands = cortex_m3_register_commands,
        .target_create = cortex_m3_target_create,
        .init_target = cortex_m3_init_target,
-       .has_mmu = cortex_m3_has_mmu,
        .examine = cortex_m3_examine,
 };
-