arm: add device tree support
If compiled with CONFIG_FDT, allow user to specify a device tree file using
the -dtb argument. If the machine supports it then the dtb will be loaded
into memory and passed to the kernel on boot.
Signed-off-by: Jeremy Kerr <jeremy.kerr@canonical.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
[Peter Maydell: Use machine opt rather than global to pass dtb filename]
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
diff --git a/vl.c b/vl.c
index 4a77696..97ab2b9 100644
--- a/vl.c
+++ b/vl.c
@@ -2527,6 +2527,9 @@
case QEMU_OPTION_append:
qemu_opts_set(qemu_find_opts("machine"), 0, "append", optarg);
break;
+ case QEMU_OPTION_dtb:
+ qemu_opts_set(qemu_find_opts("machine"), 0, "dtb", optarg);
+ break;
case QEMU_OPTION_cdrom:
drive_add(IF_DEFAULT, 2, optarg, CDROM_OPTS);
break;
@@ -3346,6 +3349,11 @@
exit(1);
}
+ if (!linux_boot && machine_opts && qemu_opt_get(machine_opts, "dtb")) {
+ fprintf(stderr, "-dtb only allowed with -kernel option\n");
+ exit(1);
+ }
+
os_set_line_buffering();
if (init_timer_alarm() < 0) {
