[RFC PATCH 02/77] Introduce v18 dtb version

[Herve Codina <herve.codina@bootlin.com>]

This v18 version will add support for
 - metadata in device-tree blobs in order to have a better handling of
   phandles and unresolved references.
 - Addon device-tree blob (successor of device-tree overlay)
 - Import and export symbols feature
 - multiple trees in a addon device-tree blob (i.e. root device tree and
   orphan node tree)

Signed-off-by: Herve Codina <herve.codina@bootlin.com>
---
 dtc.h                   |  2 +-
 fdtdump.c               |  2 +-
 flattree.c              |  2 ++
 libfdt/fdt.h            |  1 +
 libfdt/fdt_rw.c         | 13 +++++++------
 libfdt/libfdt.h         |  2 +-
 tests/pylibfdt_tests.py |  2 +-
 tests/trees.S           |  2 +-
 8 files changed, 15 insertions(+), 11 deletions(-)

diff --git a/dtc.h b/dtc.h
index 3a220b9..186caad 100644
--- a/dtc.h
+++ b/dtc.h
@@ -29,7 +29,7 @@
 #define debug(...)
 #endif
 
-#define DEFAULT_FDT_VERSION	17
+#define DEFAULT_FDT_VERSION	18
 
 /*
  * Command line options
diff --git a/fdtdump.c b/fdtdump.c
index d424869..ec25edf 100644
--- a/fdtdump.c
+++ b/fdtdump.c
@@ -18,7 +18,7 @@
 #include "util.h"
 
 #define FDT_MAGIC_SIZE	4
-#define MAX_VERSION 17U
+#define MAX_VERSION 18U
 
 #define ALIGN(x, a)	(((x) + ((a) - 1)) & ~((a) - 1))
 #define PALIGN(p, a)	((void *)(ALIGN((uintptr_t)(p), (a))))
diff --git a/flattree.c b/flattree.c
index 30e6de2..c3887da 100644
--- a/flattree.c
+++ b/flattree.c
@@ -30,6 +30,8 @@ static struct version_info {
 	 FTF_BOOTCPUID|FTF_STRTABSIZE|FTF_NOPS},
 	{17, 16, FDT_V17_SIZE,
 	 FTF_BOOTCPUID|FTF_STRTABSIZE|FTF_STRUCTSIZE|FTF_NOPS},
+	{18, 18, FDT_V18_SIZE,
+	 FTF_BOOTCPUID|FTF_STRTABSIZE|FTF_STRUCTSIZE|FTF_NOPS},
 };
 
 struct emitter {
diff --git a/libfdt/fdt.h b/libfdt/fdt.h
index a07abfc..9372353 100644
--- a/libfdt/fdt.h
+++ b/libfdt/fdt.h
@@ -62,5 +62,6 @@ struct fdt_property {
 #define FDT_V3_SIZE	(FDT_V2_SIZE + sizeof(fdt32_t))
 #define FDT_V16_SIZE	FDT_V3_SIZE
 #define FDT_V17_SIZE	(FDT_V16_SIZE + sizeof(fdt32_t))
+#define FDT_V18_SIZE	FDT_V17_SIZE
 
 #endif /* FDT_H */
diff --git a/libfdt/fdt_rw.c b/libfdt/fdt_rw.c
index 7475caf..00e32bb 100644
--- a/libfdt/fdt_rw.c
+++ b/libfdt/fdt_rw.c
@@ -28,13 +28,13 @@ static int fdt_rw_probe_(void *fdt)
 		return 0;
 	FDT_RO_PROBE(fdt);
 
-	if (!can_assume(LATEST) && fdt_version(fdt) < 17)
+	if (!can_assume(LATEST) && fdt_version(fdt) < 18)
 		return -FDT_ERR_BADVERSION;
 	if (fdt_blocks_misordered_(fdt, sizeof(struct fdt_reserve_entry),
 				   fdt_size_dt_struct(fdt)))
 		return -FDT_ERR_BADLAYOUT;
-	if (!can_assume(LATEST) && fdt_version(fdt) > 17)
-		fdt_set_version(fdt, 17);
+	if (!can_assume(LATEST) && fdt_version(fdt) > 18)
+		fdt_set_version(fdt, 18);
 
 	return 0;
 }
@@ -455,7 +455,8 @@ int fdt_open_into(const void *fdt, void *buf, int bufsize)
 		err = fdt_move(fdt, buf, bufsize);
 		if (err)
 			return err;
-		fdt_set_version(buf, 17);
+		fdt_set_version(buf, 18);
+		fdt_set_last_comp_version(buf, 18);
 		fdt_set_size_dt_struct(buf, struct_size);
 		fdt_set_totalsize(buf, bufsize);
 		return 0;
@@ -484,8 +485,8 @@ int fdt_open_into(const void *fdt, void *buf, int bufsize)
 
 	fdt_set_magic(buf, FDT_MAGIC);
 	fdt_set_totalsize(buf, bufsize);
-	fdt_set_version(buf, 17);
-	fdt_set_last_comp_version(buf, 16);
+	fdt_set_version(buf, 18);
+	fdt_set_last_comp_version(buf, 18);
 	fdt_set_boot_cpuid_phys(buf, fdt_boot_cpuid_phys(fdt));
 
 	return 0;
diff --git a/libfdt/libfdt.h b/libfdt/libfdt.h
index 7a10f66..c5cd35d 100644
--- a/libfdt/libfdt.h
+++ b/libfdt/libfdt.h
@@ -15,7 +15,7 @@ extern "C" {
 
 #define FDT_FIRST_SUPPORTED_VERSION	0x02
 #define FDT_LAST_COMPATIBLE_VERSION	0x10
-#define FDT_LAST_SUPPORTED_VERSION	0x11
+#define FDT_LAST_SUPPORTED_VERSION	0x12
 
 /* Error codes: informative error codes */
 #define FDT_ERR_NOTFOUND	1
diff --git a/tests/pylibfdt_tests.py b/tests/pylibfdt_tests.py
index a4f73ed..373e11a 100644
--- a/tests/pylibfdt_tests.py
+++ b/tests/pylibfdt_tests.py
@@ -288,7 +288,7 @@ class PyLibfdtBasicTests(unittest.TestCase):
         self.assertEqual(self.fdt.off_dt_struct(), 88)
         self.assertEqual(self.fdt.off_dt_strings(), 652)
         self.assertEqual(self.fdt.off_mem_rsvmap(), 40)
-        self.assertEqual(self.fdt.version(), 17)
+        self.assertEqual(self.fdt.version(), 18)
         self.assertEqual(self.fdt.last_comp_version(), 16)
         self.assertEqual(self.fdt.boot_cpuid_phys(), 0)
         self.assertEqual(self.fdt.size_dt_strings(), 105)
diff --git a/tests/trees.S b/tests/trees.S
index d69f7f1..ecd43bc 100644
--- a/tests/trees.S
+++ b/tests/trees.S
@@ -17,7 +17,7 @@
 	fdtlong	(\tree\()_struct - \tree)
 	fdtlong	(\tree\()_strings - \tree)
 	fdtlong	(\tree\()_rsvmap - \tree)
-	fdtlong	0x11
+	fdtlong	0x12
 	fdtlong	0x10
 	fdtlong	0
 	fdtlong	(\tree\()_strings_end - \tree\()_strings)
-- 
2.52.0