system/datadir: Add new type constant for DTB files

Currently DTB files are mixed with ROMs under BIOS type. Separate them
under a new type constant and turn defines into an enum while at it.

Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-ID: <ae793d1f81e3577605759c43871722324a1ef2cb.1745402140.git.balaton@eik.bme.hu>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>

hw/microblaze/boot.c

@@ -130,7 +130,7 @@ void microblaze_load_kernel(MicroBlazeCPU *cpu, bool is_little_endian,
     dtb_arg = current_machine->dtb;
     /* default to pcbios dtb as passed by machine_init */
     if (!dtb_arg && dtb_filename) {
-        filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, dtb_filename);
+        filename = qemu_find_file(QEMU_FILE_TYPE_DTB, dtb_filename);
     }
 
     boot_info.machine_cpu_reset = machine_cpu_reset;

hw/ppc/ppc440_bamboo.c

@@ -64,7 +64,7 @@ static int bamboo_load_device_tree(MachineState *machine,
     uint32_t tb_freq = 400000000;
     uint32_t clock_freq = 400000000;
 
-    filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, BINARY_DEVICE_TREE_FILE);
+    filename = qemu_find_file(QEMU_FILE_TYPE_DTB, BINARY_DEVICE_TREE_FILE);
     if (!filename) {
         return -1;
     }

hw/ppc/sam460ex.c

@@ -142,7 +142,7 @@ static int sam460ex_load_device_tree(MachineState *machine,
     uint32_t clock_freq = CPU_FREQ;
     int offset;
 
-    filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, BINARY_DEVICE_TREE_FILE);
+    filename = qemu_find_file(QEMU_FILE_TYPE_DTB, BINARY_DEVICE_TREE_FILE);
     if (!filename) {
         error_report("Couldn't find dtb file `%s'", BINARY_DEVICE_TREE_FILE);
         exit(1);

hw/ppc/virtex_ml507.c

@@ -146,7 +146,7 @@ static int xilinx_load_device_tree(MachineState *machine,
         /* Try the local "ppc.dtb" override.  */
         fdt = load_device_tree("ppc.dtb", &fdt_size);
         if (!fdt) {
-            path = qemu_find_file(QEMU_FILE_TYPE_BIOS, BINARY_DEVICE_TREE_FILE);
+            path = qemu_find_file(QEMU_FILE_TYPE_DTB, BINARY_DEVICE_TREE_FILE);
             if (path) {
                 fdt = load_device_tree(path, &fdt_size);
                 g_free(path);

include/qemu/datadir.h

@@ -1,11 +1,16 @@
 #ifndef QEMU_DATADIR_H
 #define QEMU_DATADIR_H
 
-#define QEMU_FILE_TYPE_BIOS   0
-#define QEMU_FILE_TYPE_KEYMAP 1
+typedef enum {
+    QEMU_FILE_TYPE_BIOS,
+    QEMU_FILE_TYPE_DTB,
+    QEMU_FILE_TYPE_KEYMAP,
+} QemuFileType;
+
 /**
  * qemu_find_file:
  * @type: QEMU_FILE_TYPE_BIOS (for BIOS, VGA BIOS)
+ *        QEMU_FILE_TYPE_DTB (for device tree blobs)
  *        or QEMU_FILE_TYPE_KEYMAP (for keymaps).
  * @name: Relative or absolute file name
  *
@@ -20,7 +25,7 @@
  *
  * Returns: a path that can access @name, or NULL if no matching file exists.
  */
-char *qemu_find_file(int type, const char *name);
+char *qemu_find_file(QemuFileType type, const char *name);
 void qemu_add_default_firmwarepath(void);
 void qemu_add_data_dir(char *path);
 void qemu_list_data_dirs(void);

system/datadir.c

@@ -30,7 +30,7 @@
 static const char *data_dir[16];
 static int data_dir_idx;
 
-char *qemu_find_file(int type, const char *name)
+char *qemu_find_file(QemuFileType type, const char *name)
 {
     int i;
     const char *subdir;
@@ -44,6 +44,7 @@ char *qemu_find_file(int type, const char *name)
 
     switch (type) {
     case QEMU_FILE_TYPE_BIOS:
+    case QEMU_FILE_TYPE_DTB:
         subdir = "";
         break;
     case QEMU_FILE_TYPE_KEYMAP: