From 4b1b1c896fb38d435f3d350c44b1bdc8b56600a4 Mon Sep 17 00:00:00 2001 From: Alexander Graf Date: Wed, 6 Jun 2012 01:01:23 +0200 Subject: 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 --- device_tree.c | 28 +++++++++++++++++++++++++++- 1 file changed, 27 insertions(+), 1 deletion(-) (limited to 'device_tree.c') 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 @@ -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++; } -- cgit v1.2.1