[][Add tool to support embed dm-verity bootargs into fdt]
[Description]
Add tool to support embed dm-verity bootargs into fdt
[Release-log]
N/A
Change-Id: I65ef262484ecc48efc513b0ef1a0cb96e5440011
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/5850557
diff --git a/tools/fdt-patch-dm-verify/src/libfdt/fdt_addresses.c b/tools/fdt-patch-dm-verify/src/libfdt/fdt_addresses.c
new file mode 100644
index 0000000..d8ba8ec
--- /dev/null
+++ b/tools/fdt-patch-dm-verify/src/libfdt/fdt_addresses.c
@@ -0,0 +1,99 @@
+// SPDX-License-Identifier: (GPL-2.0-or-later OR BSD-2-Clause)
+/*
+ * libfdt - Flat Device Tree manipulation
+ * Copyright (C) 2014 David Gibson <david@gibson.dropbear.id.au>
+ * Copyright (C) 2018 embedded brains GmbH
+ */
+#include "libfdt_env.h"
+
+#include <fdt.h>
+#include <libfdt.h>
+
+#include "libfdt_internal.h"
+
+static int fdt_cells(const void *fdt, int nodeoffset, const char *name)
+{
+ const fdt32_t *c;
+ int val;
+ int len;
+
+ c = fdt_getprop(fdt, nodeoffset, name, &len);
+ if (!c)
+ return len;
+
+ if (len != sizeof(*c))
+ return -FDT_ERR_BADNCELLS;
+
+ val = fdt32_to_cpu(*c);
+ if ((val <= 0) || (val > FDT_MAX_NCELLS))
+ return -FDT_ERR_BADNCELLS;
+
+ return val;
+}
+
+int fdt_address_cells(const void *fdt, int nodeoffset)
+{
+ int val;
+
+ val = fdt_cells(fdt, nodeoffset, "#address-cells");
+ if (val == -FDT_ERR_NOTFOUND)
+ return 2;
+ return val;
+}
+
+int fdt_size_cells(const void *fdt, int nodeoffset)
+{
+ int val;
+
+ val = fdt_cells(fdt, nodeoffset, "#size-cells");
+ if (val == -FDT_ERR_NOTFOUND)
+ return 1;
+ return val;
+}
+
+/* This function assumes that [address|size]_cells is 1 or 2 */
+int fdt_appendprop_addrrange(void *fdt, int parent, int nodeoffset,
+ const char *name, uint64_t addr, uint64_t size)
+{
+ int addr_cells, size_cells, ret;
+ uint8_t data[sizeof(fdt64_t) * 2], *prop;
+
+ ret = fdt_address_cells(fdt, parent);
+ if (ret < 0)
+ return ret;
+ addr_cells = ret;
+
+ ret = fdt_size_cells(fdt, parent);
+ if (ret < 0)
+ return ret;
+ size_cells = ret;
+
+ /* check validity of address */
+ prop = data;
+ if (addr_cells == 1) {
+ if ((addr > UINT32_MAX) || ((UINT32_MAX + 1 - addr) < size))
+ return -FDT_ERR_BADVALUE;
+
+ fdt32_st(prop, (uint32_t)addr);
+ } else if (addr_cells == 2) {
+ fdt64_st(prop, addr);
+ } else {
+ return -FDT_ERR_BADNCELLS;
+ }
+
+ /* check validity of size */
+ prop += addr_cells * sizeof(fdt32_t);
+ if (size_cells == 1) {
+ if (size > UINT32_MAX)
+ return -FDT_ERR_BADVALUE;
+
+ fdt32_st(prop, (uint32_t)size);
+ } else if (size_cells == 2) {
+ fdt64_st(prop, size);
+ } else {
+ return -FDT_ERR_BADNCELLS;
+ }
+
+ return fdt_appendprop(fdt, nodeoffset, name, data,
+ (addr_cells + size_cells) * sizeof(fdt32_t));
+}