arm_adi_v5: add helper to search for part number

Improve code readability and prepare to re-use the helper.

Change-Id: Iee5e01047c82be3dd86707f5c283f0b20cc4070d
Signed-off-by: Antonio Borneo <borneo.antonio@gmail.com>
Reviewed-on: https://review.openocd.org/c/openocd/+/6449
Tested-by: jenkins
Reviewed-by: Daniel Goehring <dgoehrin@os.amperecomputing.com>
Reviewed-by: Tarek BOCHKATI <tarek.bouchkati@gmail.com>

diff --git a/src/target/arm_adi_v5.c b/src/target/arm_adi_v5.c
index f9f4254e818c19c73e805af35024967fbca338de..0d458e2b5f8066f1c8bdedf8c4f375ddd371a96a 100644 (file)
--- a/src/target/arm_adi_v5.c
+++ b/src/target/arm_adi_v5.c
@@ -1115,12 +1115,12 @@ static int dap_read_part_id(struct adiv5_ap *ap, target_addr_t component_base, u
 
 #define ANY_ID 0x1000
 
-static const struct {
+static const struct dap_part_nums {
        uint16_t designer_id;
        uint16_t part_num;
        const char *type;
        const char *full;
-} dap_partnums[] = {
+} dap_part_nums[] = {
        { ARM_ID, 0x000, "Cortex-M3 SCS",              "(System Control Space)", },
        { ARM_ID, 0x001, "Cortex-M3 ITM",              "(Instrumentation Trace Module)", },
        { ARM_ID, 0x002, "Cortex-M3 DWT",              "(Data Watchpoint and Trace)", },
@@ -1227,6 +1227,22 @@ static const struct {
        { ANY_ID, 0x343, "TI DAPCTL",                  "", }, /* from OMAP3 memmap */
 };
 
+static const struct dap_part_nums *pidr_to_part_num(unsigned int designer_id, unsigned int part_num)
+{
+       static const struct dap_part_nums unknown = {
+               .type = "Unrecognized",
+               .full = "",
+       };
+
+       for (unsigned int i = 0; i < ARRAY_SIZE(dap_part_nums); i++) {
+               if (dap_part_nums[i].designer_id != designer_id && dap_part_nums[i].designer_id != ANY_ID)
+                       continue;
+               if (dap_part_nums[i].part_num == part_num)
+                       return &dap_part_nums[i];
+       }
+       return &unknown;
+}
+
 static int dap_devtype_display(struct command_invocation *cmd, uint32_t devtype)
 {
        const char *major = "Reserved", *subtype = "Reserved";
@@ -1408,41 +1424,24 @@ static int dap_rom_display(struct command_invocation *cmd,
 
        command_print(cmd, "\t\tPeripheral ID 0x%010" PRIx64, pid);
 
-       uint8_t class = (cid & ARM_CS_CIDR_CLASS_MASK) >> ARM_CS_CIDR_CLASS_SHIFT;
-       uint16_t part_num = ARM_CS_PIDR_PART(pid);
-       uint16_t designer_id = ARM_CS_PIDR_DESIGNER(pid);
+       const unsigned int class = (cid & ARM_CS_CIDR_CLASS_MASK) >> ARM_CS_CIDR_CLASS_SHIFT;
+       const unsigned int part_num = ARM_CS_PIDR_PART(pid);
+       unsigned int designer_id = ARM_CS_PIDR_DESIGNER(pid);
 
        if (pid & ARM_CS_PIDR_JEDEC) {
                /* JEP106 code */
-               command_print(cmd, "\t\tDesigner is 0x%03" PRIx16 ", %s",
+               command_print(cmd, "\t\tDesigner is 0x%03x, %s",
                                designer_id, jep106_manufacturer(designer_id));
        } else {
                /* Legacy ASCII ID, clear invalid bits */
                designer_id &= 0x7f;
-               command_print(cmd, "\t\tDesigner ASCII code 0x%02" PRIx16 ", %s",
+               command_print(cmd, "\t\tDesigner ASCII code 0x%02x, %s",
                                designer_id, designer_id == 0x41 ? "ARM" : "<unknown>");
        }
 
-       /* default values to be overwritten upon finding a match */
-       const char *type = "Unrecognized";
-       const char *full = "";
-
-       /* search dap_partnums[] array for a match */
-       for (unsigned entry = 0; entry < ARRAY_SIZE(dap_partnums); entry++) {
-
-               if ((dap_partnums[entry].designer_id != designer_id) && (dap_partnums[entry].designer_id != ANY_ID))
-                       continue;
-
-               if (dap_partnums[entry].part_num != part_num)
-                       continue;
-
-               type = dap_partnums[entry].type;
-               full = dap_partnums[entry].full;
-               break;
-       }
-
-       command_print(cmd, "\t\tPart is 0x%" PRIx16", %s %s", part_num, type, full);
-       command_print(cmd, "\t\tComponent class is 0x%" PRIx8 ", %s", class, class_description[class]);
+       const struct dap_part_nums *partnum = pidr_to_part_num(designer_id, part_num);
+       command_print(cmd, "\t\tPart is 0x%03x, %s %s", part_num, partnum->type, partnum->full);
+       command_print(cmd, "\t\tComponent class is 0x%x, %s", class, class_description[class]);
 
        if (class == ARM_CS_CLASS_0X1_ROM_TABLE) {
                uint32_t memtype;