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authorAlexander Graf <agraf@suse.de>2012-06-06 01:01:23 +0200
committerAlexander Graf <agraf@suse.de>2012-06-24 01:04:50 +0200
commit4b1b1c896fb38d435f3d350c44b1bdc8b56600a4 (patch)
treee928cf90e18fdb147900ab1db15f3fc2a0ff4ec6 /device_tree.c
parent3627757e32e2c9fcee84e218746639aa2bfb1723 (diff)
downloadqemu-arm-4b1b1c896fb38d435f3d350c44b1bdc8b56600a4.tar.gz
dt: Add global option to set phandle start offset
If anyone outside of QEMU wants to mess with a QEMU generated device tree, he needs to know which range phandles are valid in. So let's expose a machine option that an external program can use to set the start allocate id for phandles in QEMU. Signed-off-by: Alexander Graf <agraf@suse.de>
Diffstat (limited to 'device_tree.c')
-rw-r--r--device_tree.c28
1 files changed, 27 insertions, 1 deletions
diff --git a/device_tree.c b/device_tree.c
index cc83f0fb01..acae53e6b6 100644
--- a/device_tree.c
+++ b/device_tree.c
@@ -22,6 +22,8 @@
#include "qemu-common.h"
#include "device_tree.h"
#include "hw/loader.h"
+#include "qemu-option.h"
+#include "qemu-config.h"
#include <libfdt.h>
@@ -200,7 +202,31 @@ int qemu_devtree_setprop_phandle(void *fdt, const char *node_path,
uint32_t qemu_devtree_alloc_phandle(void *fdt)
{
- static int phandle = 0x8000;
+ static int phandle = 0x0;
+
+ /*
+ * We need to find out if the user gave us special instruction at
+ * which phandle id to start allocting phandles.
+ */
+ if (!phandle) {
+ QemuOpts *machine_opts;
+ machine_opts = qemu_opts_find(qemu_find_opts("machine"), 0);
+ if (machine_opts) {
+ const char *phandle_start;
+ phandle_start = qemu_opt_get(machine_opts, "phandle_start");
+ if (phandle_start) {
+ phandle = strtoul(phandle_start, NULL, 0);
+ }
+ }
+ }
+
+ if (!phandle) {
+ /*
+ * None or invalid phandle given on the command line, so fall back to
+ * default starting point.
+ */
+ phandle = 0x8000;
+ }
return phandle++;
}