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arm: add device tree support

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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>
This commit is contained in:
Grant Likely 2012-03-02 11:56:38 +00:00 • committed by Peter Maydell
parent 41c1e2f54e
commit 412beee6a0
7 changed files with 120 additions and 6 deletions
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8
vl.c
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@ -2527,6 +2527,9 @@ int main(int argc, char **argv, char **envp)
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 @@ int main(int argc, char **argv, char **envp)
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) {