arm_adi_v5: Split ahbap_debugport_init
[openocd.git] / src / target / arm_adi_v5.c
index 3a81784e301548e72ce1e6bcf53de335b1155f13..0cc1b5c10e3a711d2cb43d6378884c22e93aa2a1 100644 (file)
@@ -186,7 +186,7 @@ int dap_setup_accessport(struct adiv5_dap *dap, uint32_t csw, uint32_t tar)
  *
  * @return ERROR_OK for success.  Otherwise a fault code.
  */
-static int mem_ap_read_u32(struct adiv5_dap *dap, uint32_t address,
+static int mem_ap_read_u32(struct adiv5_ap *ap, uint32_t address,
                uint32_t *value)
 {
        int retval;
@@ -194,12 +194,12 @@ static int mem_ap_read_u32(struct adiv5_dap *dap, uint32_t address,
        /* Use banked addressing (REG_BDx) to avoid some link traffic
         * (updating TAR) when reading several consecutive addresses.
         */
-       retval = dap_setup_accessport(dap, CSW_32BIT | CSW_ADDRINC_OFF,
+       retval = dap_setup_accessport(ap->dap, CSW_32BIT | CSW_ADDRINC_OFF,
                        address & 0xFFFFFFF0);
        if (retval != ERROR_OK)
                return retval;
 
-       return dap_queue_ap_read(dap, MEM_AP_REG_BD0 | (address & 0xC), value);
+       return dap_queue_ap_read(ap->dap, MEM_AP_REG_BD0 | (address & 0xC), value);
 }
 
 /**
@@ -214,16 +214,16 @@ static int mem_ap_read_u32(struct adiv5_dap *dap, uint32_t address,
  * @return ERROR_OK for success; *value holds the result.
  * Otherwise a fault code.
  */
-static int mem_ap_read_atomic_u32(struct adiv5_dap *dap, uint32_t address,
+static int mem_ap_read_atomic_u32(struct adiv5_ap *ap, uint32_t address,
                uint32_t *value)
 {
        int retval;
 
-       retval = mem_ap_read_u32(dap, address, value);
+       retval = mem_ap_read_u32(ap, address, value);
        if (retval != ERROR_OK)
                return retval;
 
-       return dap_run(dap);
+       return dap_run(ap->dap);
 }
 
 /**
@@ -237,7 +237,7 @@ static int mem_ap_read_atomic_u32(struct adiv5_dap *dap, uint32_t address,
  *
  * @return ERROR_OK for success.  Otherwise a fault code.
  */
-static int mem_ap_write_u32(struct adiv5_dap *dap, uint32_t address,
+static int mem_ap_write_u32(struct adiv5_ap *ap, uint32_t address,
                uint32_t value)
 {
        int retval;
@@ -245,12 +245,12 @@ static int mem_ap_write_u32(struct adiv5_dap *dap, uint32_t address,
        /* Use banked addressing (REG_BDx) to avoid some link traffic
         * (updating TAR) when writing several consecutive addresses.
         */
-       retval = dap_setup_accessport(dap, CSW_32BIT | CSW_ADDRINC_OFF,
+       retval = dap_setup_accessport(ap->dap, CSW_32BIT | CSW_ADDRINC_OFF,
                        address & 0xFFFFFFF0);
        if (retval != ERROR_OK)
                return retval;
 
-       return dap_queue_ap_write(dap, MEM_AP_REG_BD0 | (address & 0xC),
+       return dap_queue_ap_write(ap->dap, MEM_AP_REG_BD0 | (address & 0xC),
                        value);
 }
 
@@ -265,15 +265,15 @@ static int mem_ap_write_u32(struct adiv5_dap *dap, uint32_t address,
  *
  * @return ERROR_OK for success; the data was written.  Otherwise a fault code.
  */
-static int mem_ap_write_atomic_u32(struct adiv5_dap *dap, uint32_t address,
+static int mem_ap_write_atomic_u32(struct adiv5_ap *ap, uint32_t address,
                uint32_t value)
 {
-       int retval = mem_ap_write_u32(dap, address, value);
+       int retval = mem_ap_write_u32(ap, address, value);
 
        if (retval != ERROR_OK)
                return retval;
 
-       return dap_run(dap);
+       return dap_run(ap->dap);
 }
 
 /**
@@ -288,10 +288,10 @@ static int mem_ap_write_atomic_u32(struct adiv5_dap *dap, uint32_t address,
  *  should normally be true, except when writing to e.g. a FIFO.
  * @return ERROR_OK on success, otherwise an error code.
  */
-static int mem_ap_write(struct adiv5_dap *dap, const uint8_t *buffer, uint32_t size, uint32_t count,
+static int mem_ap_write(struct adiv5_ap *ap, const uint8_t *buffer, uint32_t size, uint32_t count,
                uint32_t address, bool addrinc)
 {
-       struct adiv5_ap *ap = &dap->ap[dap_ap_get_select(dap)];
+       struct adiv5_dap *dap = ap->dap;
        size_t nbytes = size * count;
        const uint32_t csw_addrincr = addrinc ? CSW_ADDRINC_SINGLE : CSW_ADDRINC_OFF;
        uint32_t csw_size;
@@ -419,10 +419,10 @@ static int mem_ap_write(struct adiv5_dap *dap, const uint8_t *buffer, uint32_t s
  *  should normally be true, except when reading from e.g. a FIFO.
  * @return ERROR_OK on success, otherwise an error code.
  */
-static int mem_ap_read(struct adiv5_dap *dap, uint8_t *buffer, uint32_t size, uint32_t count,
+static int mem_ap_read(struct adiv5_ap *ap, uint8_t *buffer, uint32_t size, uint32_t count,
                uint32_t adr, bool addrinc)
 {
-       struct adiv5_ap *ap = &dap->ap[dap_ap_get_select(dap)];
+       struct adiv5_dap *dap = ap->dap;
        size_t nbytes = size * count;
        const uint32_t csw_addrincr = addrinc ? CSW_ADDRINC_SINGLE : CSW_ADDRINC_OFF;
        uint32_t csw_size;
@@ -561,60 +561,60 @@ static int mem_ap_read(struct adiv5_dap *dap, uint8_t *buffer, uint32_t size, ui
 /*--------------------------------------------------------------------*/
 /*          Wrapping function with selection of AP                    */
 /*--------------------------------------------------------------------*/
-int mem_ap_sel_read_u32(struct adiv5_dap *swjdp, uint8_t ap,
+int mem_ap_sel_read_u32(struct adiv5_ap *ap,
                uint32_t address, uint32_t *value)
 {
-       dap_ap_select(swjdp, ap);
-       return mem_ap_read_u32(swjdp, address, value);
+       dap_ap_select(ap->dap, ap->ap_num);
+       return mem_ap_read_u32(ap, address, value);
 }
 
-int mem_ap_sel_write_u32(struct adiv5_dap *swjdp, uint8_t ap,
+int mem_ap_sel_write_u32(struct adiv5_ap *ap,
                uint32_t address, uint32_t value)
 {
-       dap_ap_select(swjdp, ap);
-       return mem_ap_write_u32(swjdp, address, value);
+       dap_ap_select(ap->dap, ap->ap_num);
+       return mem_ap_write_u32(ap, address, value);
 }
 
-int mem_ap_sel_read_atomic_u32(struct adiv5_dap *swjdp, uint8_t ap,
+int mem_ap_sel_read_atomic_u32(struct adiv5_ap *ap,
                uint32_t address, uint32_t *value)
 {
-       dap_ap_select(swjdp, ap);
-       return mem_ap_read_atomic_u32(swjdp, address, value);
+       dap_ap_select(ap->dap, ap->ap_num);
+       return mem_ap_read_atomic_u32(ap, address, value);
 }
 
-int mem_ap_sel_write_atomic_u32(struct adiv5_dap *swjdp, uint8_t ap,
+int mem_ap_sel_write_atomic_u32(struct adiv5_ap *ap,
                uint32_t address, uint32_t value)
 {
-       dap_ap_select(swjdp, ap);
-       return mem_ap_write_atomic_u32(swjdp, address, value);
+       dap_ap_select(ap->dap, ap->ap_num);
+       return mem_ap_write_atomic_u32(ap, address, value);
 }
 
-int mem_ap_sel_read_buf(struct adiv5_dap *swjdp, uint8_t ap,
+int mem_ap_sel_read_buf(struct adiv5_ap *ap,
                uint8_t *buffer, uint32_t size, uint32_t count, uint32_t address)
 {
-       dap_ap_select(swjdp, ap);
-       return mem_ap_read(swjdp, buffer, size, count, address, true);
+       dap_ap_select(ap->dap, ap->ap_num);
+       return mem_ap_read(ap, buffer, size, count, address, true);
 }
 
-int mem_ap_sel_write_buf(struct adiv5_dap *swjdp, uint8_t ap,
+int mem_ap_sel_write_buf(struct adiv5_ap *ap,
                const uint8_t *buffer, uint32_t size, uint32_t count, uint32_t address)
 {
-       dap_ap_select(swjdp, ap);
-       return mem_ap_write(swjdp, buffer, size, count, address, true);
+       dap_ap_select(ap->dap, ap->ap_num);
+       return mem_ap_write(ap, buffer, size, count, address, true);
 }
 
-int mem_ap_sel_read_buf_noincr(struct adiv5_dap *swjdp, uint8_t ap,
+int mem_ap_sel_read_buf_noincr(struct adiv5_ap *ap,
                uint8_t *buffer, uint32_t size, uint32_t count, uint32_t address)
 {
-       dap_ap_select(swjdp, ap);
-       return mem_ap_read(swjdp, buffer, size, count, address, false);
+       dap_ap_select(ap->dap, ap->ap_num);
+       return mem_ap_read(ap, buffer, size, count, address, false);
 }
 
-int mem_ap_sel_write_buf_noincr(struct adiv5_dap *swjdp, uint8_t ap,
+int mem_ap_sel_write_buf_noincr(struct adiv5_ap *ap,
                const uint8_t *buffer, uint32_t size, uint32_t count, uint32_t address)
 {
-       dap_ap_select(swjdp, ap);
-       return mem_ap_write(swjdp, buffer, size, count, address, false);
+       dap_ap_select(ap->dap, ap->ap_num);
+       return mem_ap_write(ap, buffer, size, count, address, false);
 }
 
 /*--------------------------------------------------------------------------*/
@@ -645,45 +645,33 @@ struct adiv5_dap *dap_init(void)
                /* Number of bits for tar autoincrement, impl. dep. at least 10 */
                dap->ap[i].tar_autoincr_block = (1<<10);
        }
+       dap->ap_current = -1;
+       dap->ap_bank_value = -1;
+       dap->dp_bank_value = -1;
        return dap;
 }
 
 /**
  * Initialize a DAP.  This sets up the power domains, prepares the DP
- * for further use, and arranges to use AP #0 for all AP operations
- * until dap_ap-select() changes that policy.
+ * for further use and activates overrun checking.
  *
  * @param dap The DAP being initialized.
- *
- * @todo Rename this.  We also need an initialization scheme which account
- * for SWD transports not just JTAG; that will need to address differences
- * in layering.  (JTAG is useful without any debug target; but not SWD.)
- * And this may not even use an AHB-AP ... e.g. DAP-Lite uses an APB-AP.
  */
-int ahbap_debugport_init(struct adiv5_dap *dap, uint8_t apsel)
+int dap_dp_init(struct adiv5_dap *dap)
 {
-       /* check that we support packed transfers */
-       uint32_t csw, cfg;
        int retval;
-       struct adiv5_ap *ap = &dap->ap[apsel];
 
        LOG_DEBUG(" ");
-
        /* JTAG-DP or SWJ-DP, in JTAG mode
         * ... for SWD mode this is patched as part
         * of link switchover
+        * FIXME: This should already be setup by the respective transport specific DAP creation.
         */
        if (!dap->ops)
                dap->ops = &jtag_dp_ops;
 
-       /* Default MEM-AP setup.
-        *
-        * REVISIT AP #0 may be an inappropriate default for this.
-        * Should we probe, or take a hint from the caller?
-        * Presumably we can ignore the possibility of multiple APs.
-        */
        dap->ap_current = -1;
-       dap_ap_select(dap, apsel);
+       dap->ap_bank_value = -1;
        dap->last_read = NULL;
 
        for (size_t i = 0; i < 10; i++) {
@@ -726,6 +714,7 @@ int ahbap_debugport_init(struct adiv5_dap *dap, uint8_t apsel)
                retval = dap_queue_dp_read(dap, DP_CTRL_STAT, NULL);
                if (retval != ERROR_OK)
                        continue;
+
                /* With debug power on we can activate OVERRUN checking */
                dap->dp_ctrl_stat = CDBGPWRUPREQ | CSYSPWRUPREQ | CORUNDETECT;
                retval = dap_queue_dp_write(dap, DP_CTRL_STAT, dap->dp_ctrl_stat);
@@ -735,18 +724,6 @@ int ahbap_debugport_init(struct adiv5_dap *dap, uint8_t apsel)
                if (retval != ERROR_OK)
                        continue;
 
-               retval = dap_setup_accessport(dap, CSW_8BIT | CSW_ADDRINC_PACKED, 0);
-               if (retval != ERROR_OK)
-                       continue;
-
-               retval = dap_queue_ap_read(dap, MEM_AP_REG_CSW, &csw);
-               if (retval != ERROR_OK)
-                       continue;
-
-               retval = dap_queue_ap_read(dap, MEM_AP_REG_CFG, &cfg);
-               if (retval != ERROR_OK)
-                       continue;
-
                retval = dap_run(dap);
                if (retval != ERROR_OK)
                        continue;
@@ -754,6 +731,38 @@ int ahbap_debugport_init(struct adiv5_dap *dap, uint8_t apsel)
                break;
        }
 
+       return retval;
+}
+
+/**
+ * Initialize a DAP.  This sets up the power domains, prepares the DP
+ * for further use, and arranges to use AP #0 for all AP operations
+ * until dap_ap-select() changes that policy.
+ *
+ * @param ap The MEM-AP being initialized.
+ */
+int mem_ap_init(struct adiv5_ap *ap)
+{
+       /* check that we support packed transfers */
+       uint32_t csw, cfg;
+       int retval;
+       struct adiv5_dap *dap = ap->dap;
+
+       dap_ap_select(dap, ap->ap_num);
+
+       retval = dap_setup_accessport(dap, CSW_8BIT | CSW_ADDRINC_PACKED, 0);
+       if (retval != ERROR_OK)
+               return retval;
+
+       retval = dap_queue_ap_read(dap, MEM_AP_REG_CSW, &csw);
+       if (retval != ERROR_OK)
+               return retval;
+
+       retval = dap_queue_ap_read(dap, MEM_AP_REG_CFG, &cfg);
+       if (retval != ERROR_OK)
+               return retval;
+
+       retval = dap_run(dap);
        if (retval != ERROR_OK)
                return retval;
 
@@ -804,16 +813,16 @@ static bool is_dap_cid_ok(uint32_t cid3, uint32_t cid2, uint32_t cid1, uint32_t
 /*
  * This function checks the ID for each access port to find the requested Access Port type
  */
-int dap_find_ap(struct adiv5_dap *dap, enum ap_type type_to_find, uint8_t *ap_num_out)
+int dap_find_ap(struct adiv5_dap *dap, enum ap_type type_to_find, struct adiv5_ap **ap_out)
 {
-       int ap;
+       int ap_num;
 
        /* Maximum AP number is 255 since the SELECT register is 8 bits */
-       for (ap = 0; ap <= 255; ap++) {
+       for (ap_num = 0; ap_num <= 255; ap_num++) {
 
                /* read the IDR register of the Access Port */
                uint32_t id_val = 0;
-               dap_ap_select(dap, ap);
+               dap_ap_select(dap, ap_num);
 
                int retval = dap_queue_ap_read(dap, AP_REG_IDR, &id_val);
                if (retval != ERROR_OK)
@@ -835,17 +844,17 @@ int dap_find_ap(struct adiv5_dap *dap, enum ap_type type_to_find, uint8_t *ap_nu
                 * but just to be sure, try to continue searching if an error does happen.
                 */
                if ((retval == ERROR_OK) &&                  /* Register read success */
-                       ((id_val & 0x0FFF0000) == 0x04770000) && /* Jedec codes match */
-                       ((id_val & 0xF) == type_to_find)) {      /* type matches*/
+                       ((id_val & IDR_JEP106) == IDR_JEP106_ARM) && /* Jedec codes match */
+                       ((id_val & IDR_TYPE) == type_to_find)) {      /* type matches*/
 
                        LOG_DEBUG("Found %s at AP index: %d (IDR=0x%08" PRIX32 ")",
                                                (type_to_find == AP_TYPE_AHB_AP)  ? "AHB-AP"  :
                                                (type_to_find == AP_TYPE_APB_AP)  ? "APB-AP"  :
                                                (type_to_find == AP_TYPE_AXI_AP)  ? "AXI-AP"  :
                                                (type_to_find == AP_TYPE_JTAG_AP) ? "JTAG-AP" : "Unknown",
-                                               ap, id_val);
+                                               ap_num, id_val);
 
-                       *ap_num_out = ap;
+                       *ap_out = &dap->ap[ap_num];
                        return ERROR_OK;
                }
        }
@@ -858,18 +867,15 @@ int dap_find_ap(struct adiv5_dap *dap, enum ap_type type_to_find, uint8_t *ap_nu
        return ERROR_FAIL;
 }
 
-int dap_get_debugbase(struct adiv5_dap *dap, int ap,
+int dap_get_debugbase(struct adiv5_ap *ap,
                        uint32_t *dbgbase, uint32_t *apid)
 {
+       struct adiv5_dap *dap = ap->dap;
        uint32_t ap_old;
        int retval;
 
-       /* AP address is in bits 31:24 of DP_SELECT */
-       if (ap >= 256)
-               return ERROR_COMMAND_SYNTAX_ERROR;
-
        ap_old = dap_ap_get_select(dap);
-       dap_ap_select(dap, ap);
+       dap_ap_select(dap, ap->ap_num);
 
        retval = dap_queue_ap_read(dap, MEM_AP_REG_BASE, dbgbase);
        if (retval != ERROR_OK)
@@ -886,22 +892,19 @@ int dap_get_debugbase(struct adiv5_dap *dap, int ap,
        return ERROR_OK;
 }
 
-int dap_lookup_cs_component(struct adiv5_dap *dap, int ap,
+int dap_lookup_cs_component(struct adiv5_ap *ap,
                        uint32_t dbgbase, uint8_t type, uint32_t *addr, int32_t *idx)
 {
+       struct adiv5_dap *dap = ap->dap;
        uint32_t ap_old;
        uint32_t romentry, entry_offset = 0, component_base, devtype;
        int retval;
 
-       if (ap >= 256)
-               return ERROR_COMMAND_SYNTAX_ERROR;
-
        *addr = 0;
        ap_old = dap_ap_get_select(dap);
-       dap_ap_select(dap, ap);
 
        do {
-               retval = mem_ap_read_atomic_u32(dap, (dbgbase&0xFFFFF000) |
+               retval = mem_ap_sel_read_atomic_u32(ap, (dbgbase&0xFFFFF000) |
                                                entry_offset, &romentry);
                if (retval != ERROR_OK)
                        return retval;
@@ -911,14 +914,14 @@ int dap_lookup_cs_component(struct adiv5_dap *dap, int ap,
 
                if (romentry & 0x1) {
                        uint32_t c_cid1;
-                       retval = mem_ap_read_atomic_u32(dap, component_base | 0xff4, &c_cid1);
+                       retval = mem_ap_sel_read_atomic_u32(ap, component_base | 0xff4, &c_cid1);
                        if (retval != ERROR_OK) {
                                LOG_ERROR("Can't read component with base address 0x%" PRIx32
                                          ", the corresponding core might be turned off", component_base);
                                return retval;
                        }
                        if (((c_cid1 >> 4) & 0x0f) == 1) {
-                               retval = dap_lookup_cs_component(dap, ap, component_base,
+                               retval = dap_lookup_cs_component(ap, component_base,
                                                        type, addr, idx);
                                if (retval == ERROR_OK)
                                        break;
@@ -926,7 +929,7 @@ int dap_lookup_cs_component(struct adiv5_dap *dap, int ap,
                                        return retval;
                        }
 
-                       retval = mem_ap_read_atomic_u32(dap,
+                       retval = mem_ap_sel_read_atomic_u32(ap,
                                        (component_base & 0xfffff000) | 0xfcc,
                                        &devtype);
                        if (retval != ERROR_OK)
@@ -951,8 +954,9 @@ int dap_lookup_cs_component(struct adiv5_dap *dap, int ap,
 }
 
 static int dap_rom_display(struct command_context *cmd_ctx,
-                               struct adiv5_dap *dap, int ap, uint32_t dbgbase, int depth)
+                               struct adiv5_ap *ap, uint32_t dbgbase, int depth)
 {
+       struct adiv5_dap *dap = ap->dap;
        int retval;
        uint32_t cid0, cid1, cid2, cid3, memtype, romentry;
        uint16_t entry_offset;
@@ -973,19 +977,19 @@ static int dap_rom_display(struct command_context *cmd_ctx,
                command_print(cmd_ctx, "\t%sROM table in legacy format", tabs);
 
        /* Now we read ROM table ID registers, ref. ARM IHI 0029B sec  */
-       retval = mem_ap_read_u32(dap, (dbgbase&0xFFFFF000) | 0xFF0, &cid0);
+       retval = mem_ap_sel_read_u32(ap, (dbgbase&0xFFFFF000) | 0xFF0, &cid0);
        if (retval != ERROR_OK)
                return retval;
-       retval = mem_ap_read_u32(dap, (dbgbase&0xFFFFF000) | 0xFF4, &cid1);
+       retval = mem_ap_sel_read_u32(ap, (dbgbase&0xFFFFF000) | 0xFF4, &cid1);
        if (retval != ERROR_OK)
                return retval;
-       retval = mem_ap_read_u32(dap, (dbgbase&0xFFFFF000) | 0xFF8, &cid2);
+       retval = mem_ap_sel_read_u32(ap, (dbgbase&0xFFFFF000) | 0xFF8, &cid2);
        if (retval != ERROR_OK)
                return retval;
-       retval = mem_ap_read_u32(dap, (dbgbase&0xFFFFF000) | 0xFFC, &cid3);
+       retval = mem_ap_sel_read_u32(ap, (dbgbase&0xFFFFF000) | 0xFFC, &cid3);
        if (retval != ERROR_OK)
                return retval;
-       retval = mem_ap_read_u32(dap, (dbgbase&0xFFFFF000) | 0xFCC, &memtype);
+       retval = mem_ap_sel_read_u32(ap, (dbgbase&0xFFFFF000) | 0xFCC, &memtype);
        if (retval != ERROR_OK)
                return retval;
        retval = dap_run(dap);
@@ -1007,7 +1011,7 @@ static int dap_rom_display(struct command_context *cmd_ctx,
 
        /* Now we read ROM table entries from dbgbase&0xFFFFF000) | 0x000 until we get 0x00000000 */
        for (entry_offset = 0; ; entry_offset += 4) {
-               retval = mem_ap_read_atomic_u32(dap, (dbgbase&0xFFFFF000) | entry_offset, &romentry);
+               retval = mem_ap_sel_read_atomic_u32(ap, (dbgbase&0xFFFFF000) | entry_offset, &romentry);
                if (retval != ERROR_OK)
                        return retval;
                command_print(cmd_ctx, "\t%sROMTABLE[0x%x] = 0x%" PRIx32 "",
@@ -1022,43 +1026,43 @@ static int dap_rom_display(struct command_context *cmd_ctx,
                        component_base = (dbgbase & 0xFFFFF000) + (romentry & 0xFFFFF000);
 
                        /* IDs are in last 4K section */
-                       retval = mem_ap_read_atomic_u32(dap, component_base + 0xFE0, &c_pid0);
+                       retval = mem_ap_sel_read_atomic_u32(ap, component_base + 0xFE0, &c_pid0);
                        if (retval != ERROR_OK) {
                                command_print(cmd_ctx, "\t%s\tCan't read component with base address 0x%" PRIx32
                                              ", the corresponding core might be turned off", tabs, component_base);
                                continue;
                        }
                        c_pid0 &= 0xff;
-                       retval = mem_ap_read_atomic_u32(dap, component_base + 0xFE4, &c_pid1);
+                       retval = mem_ap_sel_read_atomic_u32(ap, component_base + 0xFE4, &c_pid1);
                        if (retval != ERROR_OK)
                                return retval;
                        c_pid1 &= 0xff;
-                       retval = mem_ap_read_atomic_u32(dap, component_base + 0xFE8, &c_pid2);
+                       retval = mem_ap_sel_read_atomic_u32(ap, component_base + 0xFE8, &c_pid2);
                        if (retval != ERROR_OK)
                                return retval;
                        c_pid2 &= 0xff;
-                       retval = mem_ap_read_atomic_u32(dap, component_base + 0xFEC, &c_pid3);
+                       retval = mem_ap_sel_read_atomic_u32(ap, component_base + 0xFEC, &c_pid3);
                        if (retval != ERROR_OK)
                                return retval;
                        c_pid3 &= 0xff;
-                       retval = mem_ap_read_atomic_u32(dap, component_base + 0xFD0, &c_pid4);
+                       retval = mem_ap_sel_read_atomic_u32(ap, component_base + 0xFD0, &c_pid4);
                        if (retval != ERROR_OK)
                                return retval;
                        c_pid4 &= 0xff;
 
-                       retval = mem_ap_read_atomic_u32(dap, component_base + 0xFF0, &c_cid0);
+                       retval = mem_ap_sel_read_atomic_u32(ap, component_base + 0xFF0, &c_cid0);
                        if (retval != ERROR_OK)
                                return retval;
                        c_cid0 &= 0xff;
-                       retval = mem_ap_read_atomic_u32(dap, component_base + 0xFF4, &c_cid1);
+                       retval = mem_ap_sel_read_atomic_u32(ap, component_base + 0xFF4, &c_cid1);
                        if (retval != ERROR_OK)
                                return retval;
                        c_cid1 &= 0xff;
-                       retval = mem_ap_read_atomic_u32(dap, component_base + 0xFF8, &c_cid2);
+                       retval = mem_ap_sel_read_atomic_u32(ap, component_base + 0xFF8, &c_cid2);
                        if (retval != ERROR_OK)
                                return retval;
                        c_cid2 &= 0xff;
-                       retval = mem_ap_read_atomic_u32(dap, component_base + 0xFFC, &c_cid3);
+                       retval = mem_ap_sel_read_atomic_u32(ap, component_base + 0xFFC, &c_cid3);
                        if (retval != ERROR_OK)
                                return retval;
                        c_cid3 &= 0xff;
@@ -1078,7 +1082,7 @@ static int dap_rom_display(struct command_context *cmd_ctx,
                                unsigned minor;
                                const char *major = "Reserved", *subtype = "Reserved";
 
-                               retval = mem_ap_read_atomic_u32(dap,
+                               retval = mem_ap_sel_read_atomic_u32(ap,
                                                (component_base & 0xfffff000) | 0xfcc,
                                                &devtype);
                                if (retval != ERROR_OK)
@@ -1404,7 +1408,7 @@ static int dap_rom_display(struct command_context *cmd_ctx,
 
                        /* ROM Table? */
                        if (((c_cid1 >> 4) & 0x0f) == 1) {
-                               retval = dap_rom_display(cmd_ctx, dap, ap, component_base, depth + 1);
+                               retval = dap_rom_display(cmd_ctx, ap, component_base, depth + 1);
                                if (retval != ERROR_OK)
                                        return retval;
                        }
@@ -1420,54 +1424,55 @@ static int dap_rom_display(struct command_context *cmd_ctx,
 }
 
 static int dap_info_command(struct command_context *cmd_ctx,
-               struct adiv5_dap *dap, int ap)
+               struct adiv5_ap *ap)
 {
        int retval;
        uint32_t dbgbase, apid;
        int romtable_present = 0;
        uint8_t mem_ap;
-       uint32_t ap_old;
 
-       retval = dap_get_debugbase(dap, ap, &dbgbase, &apid);
+       /* Now we read ROM table ID registers, ref. ARM IHI 0029B sec  */
+       retval = dap_get_debugbase(ap, &dbgbase, &apid);
        if (retval != ERROR_OK)
                return retval;
 
-       ap_old = dap_ap_get_select(dap);
-       dap_ap_select(dap, ap);
-
-       /* Now we read ROM table ID registers, ref. ARM IHI 0029B sec  */
-       mem_ap = ((apid&0x10000) && ((apid&0x0F) != 0));
        command_print(cmd_ctx, "AP ID register 0x%8.8" PRIx32, apid);
-       if (apid) {
-               switch (apid&0x0F) {
-                       case 0:
-                               command_print(cmd_ctx, "\tType is JTAG-AP");
-                               break;
-                       case 1:
-                               command_print(cmd_ctx, "\tType is MEM-AP AHB");
-                               break;
-                       case 2:
-                               command_print(cmd_ctx, "\tType is MEM-AP APB");
-                               break;
-                       default:
-                               command_print(cmd_ctx, "\tUnknown AP type");
-                               break;
-               }
+       if (apid == 0) {
+               command_print(cmd_ctx, "No AP found at this ap 0x%x", ap->ap_num);
+               return ERROR_FAIL;
+       }
 
-               /* NOTE: a MEM-AP may have a single CoreSight component that's
-                * not a ROM table ... or have no such components at all.
-                */
-               if (mem_ap)
-                       command_print(cmd_ctx, "AP BASE 0x%8.8" PRIx32, dbgbase);
-       } else
-               command_print(cmd_ctx, "No AP found at this ap 0x%x", ap);
-
-       romtable_present = ((mem_ap) && (dbgbase != 0xFFFFFFFF));
-       if (romtable_present)
-               dap_rom_display(cmd_ctx, dap, ap, dbgbase, 0);
-       else
-               command_print(cmd_ctx, "\tNo ROM table present");
-       dap_ap_select(dap, ap_old);
+       switch (apid & (IDR_JEP106 | IDR_TYPE)) {
+       case IDR_JEP106_ARM | AP_TYPE_JTAG_AP:
+               command_print(cmd_ctx, "\tType is JTAG-AP");
+               break;
+       case IDR_JEP106_ARM | AP_TYPE_AHB_AP:
+               command_print(cmd_ctx, "\tType is MEM-AP AHB");
+               break;
+       case IDR_JEP106_ARM | AP_TYPE_APB_AP:
+               command_print(cmd_ctx, "\tType is MEM-AP APB");
+               break;
+       case IDR_JEP106_ARM | AP_TYPE_AXI_AP:
+               command_print(cmd_ctx, "\tType is MEM-AP AXI");
+               break;
+       default:
+               command_print(cmd_ctx, "\tUnknown AP type");
+               break;
+       }
+
+       /* NOTE: a MEM-AP may have a single CoreSight component that's
+        * not a ROM table ... or have no such components at all.
+        */
+       mem_ap = (apid & IDR_CLASS) == AP_CLASS_MEM_AP;
+       if (mem_ap) {
+               command_print(cmd_ctx, "MEM-AP BASE 0x%8.8" PRIx32, dbgbase);
+
+               romtable_present = dbgbase != 0xFFFFFFFF;
+               if (romtable_present)
+                       dap_rom_display(cmd_ctx, ap, dbgbase, 0);
+               else
+                       command_print(cmd_ctx, "\tNo ROM table present");
+       }
 
        return ERROR_OK;
 }
@@ -1485,12 +1490,14 @@ COMMAND_HANDLER(handle_dap_info_command)
                break;
        case 1:
                COMMAND_PARSE_NUMBER(u32, CMD_ARGV[0], apsel);
+               if (apsel >= 256)
+                       return ERROR_COMMAND_SYNTAX_ERROR;
                break;
        default:
                return ERROR_COMMAND_SYNTAX_ERROR;
        }
 
-       return dap_info_command(CMD_CTX, dap, apsel);
+       return dap_info_command(CMD_CTX, &dap->ap[apsel]);
 }
 
 COMMAND_HANDLER(dap_baseaddr_command)

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