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[src/trunk]: src/external/gpl2/dtc/dist Import of DTC from DTC version 1.4.4
details: https://anonhg.NetBSD.org/src/rev/616cabf55422
branches: trunk
changeset: 824541:616cabf55422
user: skrll <skrll%NetBSD.org@localhost>
date: Thu Jun 08 15:59:15 2017 +0000
description:
Import of DTC from DTC version 1.4.4
diffstat:
external/gpl2/dtc/dist/Documentation/dt-object-internal.txt | 310 ++++++
external/gpl2/dtc/dist/Documentation/manual.txt | 23 +-
external/gpl2/dtc/dist/Makefile | 32 +-
external/gpl2/dtc/dist/README | 4 -
external/gpl2/dtc/dist/checks.c | 481 +++++----
external/gpl2/dtc/dist/convert-dtsv0-lexer.l | 6 +-
external/gpl2/dtc/dist/dtc.c | 78 +-
external/gpl2/dtc/dist/fdtget.c | 14 +-
external/gpl2/dtc/dist/fstree.c | 7 +-
external/gpl2/dtc/dist/livetree.c | 321 ++++++-
external/gpl2/dtc/dist/srcpos.h | 14 +-
external/gpl2/dtc/dist/tests/.gitignore | 4 +
external/gpl2/dtc/dist/tests/Makefile.tests | 5 +-
external/gpl2/dtc/dist/tests/add_subnode_with_nops.c | 2 +
external/gpl2/dtc/dist/tests/addr_size_cells.c | 2 +
external/gpl2/dtc/dist/tests/appendprop1.c | 2 +
external/gpl2/dtc/dist/tests/appendprop2.c | 2 +
external/gpl2/dtc/dist/tests/asm_tree_dump.c | 2 +
external/gpl2/dtc/dist/tests/bad-octal-literal.dts | 5 +
external/gpl2/dtc/dist/tests/boot-cpuid.c | 2 +
external/gpl2/dtc/dist/tests/char_literal.c | 4 +-
external/gpl2/dtc/dist/tests/check_path.c | 85 +
external/gpl2/dtc/dist/tests/del_node.c | 2 +
external/gpl2/dtc/dist/tests/del_property.c | 2 +
external/gpl2/dtc/dist/tests/division-by-zero.dts | 6 +
external/gpl2/dtc/dist/tests/dtb_reverse.c | 2 +
external/gpl2/dtc/dist/tests/dtbs_equal_ordered.c | 4 +-
external/gpl2/dtc/dist/tests/dtbs_equal_unordered.c | 12 +-
external/gpl2/dtc/dist/tests/dumptrees.c | 5 +-
external/gpl2/dtc/dist/tests/extra-terminating-null.c | 2 +
external/gpl2/dtc/dist/tests/find_property.c | 2 +
external/gpl2/dtc/dist/tests/get_alias.c | 2 +
external/gpl2/dtc/dist/tests/get_mem_rsv.c | 2 +
external/gpl2/dtc/dist/tests/get_name.c | 2 +
external/gpl2/dtc/dist/tests/get_path.c | 2 +
external/gpl2/dtc/dist/tests/get_phandle.c | 8 +
external/gpl2/dtc/dist/tests/getprop.c | 2 +
external/gpl2/dtc/dist/tests/incbin.c | 2 +
external/gpl2/dtc/dist/tests/integer-expressions.c | 6 +-
external/gpl2/dtc/dist/tests/line_directives.dts | 5 +
external/gpl2/dtc/dist/tests/node_check_compatible.c | 2 +
external/gpl2/dtc/dist/tests/node_offset_by_compatible.c | 2 +
external/gpl2/dtc/dist/tests/node_offset_by_phandle.c | 2 +
external/gpl2/dtc/dist/tests/node_offset_by_prop_value.c | 4 +-
external/gpl2/dtc/dist/tests/nop_node.c | 2 +
external/gpl2/dtc/dist/tests/nop_property.c | 2 +
external/gpl2/dtc/dist/tests/nopulate.c | 4 +-
external/gpl2/dtc/dist/tests/notfound.c | 2 +
external/gpl2/dtc/dist/tests/nul-in-escape.dts | Bin
external/gpl2/dtc/dist/tests/nul-in-line-info1.dts | Bin
external/gpl2/dtc/dist/tests/nul-in-line-info2.dts | 1 +
external/gpl2/dtc/dist/tests/open_pack.c | 2 +
external/gpl2/dtc/dist/tests/overlay.c | 235 ++++
external/gpl2/dtc/dist/tests/overlay_bad_fixup.c | 72 +
external/gpl2/dtc/dist/tests/overlay_bad_fixup_bad_index.dts | 14 +
external/gpl2/dtc/dist/tests/overlay_bad_fixup_base.dtsi | 18 +
external/gpl2/dtc/dist/tests/overlay_bad_fixup_empty.dts | 14 +
external/gpl2/dtc/dist/tests/overlay_bad_fixup_empty_index.dts | 14 +
external/gpl2/dtc/dist/tests/overlay_bad_fixup_index_trailing.dts | 14 +
external/gpl2/dtc/dist/tests/overlay_bad_fixup_path_empty_prop.dts | 14 +
external/gpl2/dtc/dist/tests/overlay_bad_fixup_path_only.dts | 14 +
external/gpl2/dtc/dist/tests/overlay_bad_fixup_path_only_sep.dts | 14 +
external/gpl2/dtc/dist/tests/overlay_bad_fixup_path_prop.dts | 14 +
external/gpl2/dtc/dist/tests/overlay_base.dts | 21 +
external/gpl2/dtc/dist/tests/overlay_base_manual_symbols.dts | 25 +
external/gpl2/dtc/dist/tests/overlay_overlay.dts | 86 +
external/gpl2/dtc/dist/tests/overlay_overlay_manual_fixups.dts | 112 ++
external/gpl2/dtc/dist/tests/overlay_overlay_no_fixups.dts | 82 +
external/gpl2/dtc/dist/tests/overlay_overlay_simple.dts | 12 +
external/gpl2/dtc/dist/tests/parent_offset.c | 2 +
external/gpl2/dtc/dist/tests/path-references.c | 2 +
external/gpl2/dtc/dist/tests/path_offset.c | 2 +
external/gpl2/dtc/dist/tests/path_offset_aliases.c | 2 +
external/gpl2/dtc/dist/tests/phandle_format.c | 2 +
external/gpl2/dtc/dist/tests/property_iterate.c | 99 ++
external/gpl2/dtc/dist/tests/property_iterate.dts | 23 +
external/gpl2/dtc/dist/tests/propname_escapes.c | 2 +
external/gpl2/dtc/dist/tests/references.c | 6 +-
external/gpl2/dtc/dist/tests/reg-without-unit-addr.dts | 10 +
external/gpl2/dtc/dist/tests/root_node.c | 2 +
external/gpl2/dtc/dist/tests/run_tests.sh | 119 ++
external/gpl2/dtc/dist/tests/rw_tree1.c | 2 +
external/gpl2/dtc/dist/tests/set_name.c | 2 +
external/gpl2/dtc/dist/tests/setprop.c | 4 +-
external/gpl2/dtc/dist/tests/setprop_inplace.c | 12 +
external/gpl2/dtc/dist/tests/sized_cells.c | 8 +-
external/gpl2/dtc/dist/tests/string_escapes.c | 2 +
external/gpl2/dtc/dist/tests/stringlist.c | 2 +
external/gpl2/dtc/dist/tests/subnode_iterate.c | 14 +-
external/gpl2/dtc/dist/tests/subnode_offset.c | 2 +
external/gpl2/dtc/dist/tests/supernode_atdepth_offset.c | 2 +
external/gpl2/dtc/dist/tests/sw_tree1.c | 6 +-
external/gpl2/dtc/dist/tests/test_label_ref.dts | 9 +
external/gpl2/dtc/dist/tests/test_tree1.dts | 44 +-
external/gpl2/dtc/dist/tests/test_tree1_delete.dts | 2 +-
external/gpl2/dtc/dist/tests/testdata.h | 6 +
external/gpl2/dtc/dist/tests/testutils.c | 2 +
external/gpl2/dtc/dist/tests/trees.S | 31 +
external/gpl2/dtc/dist/tests/truncated_property.c | 2 +
external/gpl2/dtc/dist/tests/unit-addr-without-reg.dts | 9 +
external/gpl2/dtc/dist/tests/utilfdt_test.c | 2 +
external/gpl2/dtc/dist/tests/value-labels.c | 8 +-
external/gpl2/dtc/dist/treesource.c | 22 +-
external/gpl2/dtc/dist/util.c | 44 +-
104 files changed, 2467 insertions(+), 312 deletions(-)
diffs (truncated from 4430 to 300 lines):
diff -r c39da17af780 -r 616cabf55422 external/gpl2/dtc/dist/Documentation/dt-object-internal.txt
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/external/gpl2/dtc/dist/Documentation/dt-object-internal.txt Thu Jun 08 15:59:15 2017 +0000
@@ -0,0 +1,310 @@
+Device Tree Dynamic Object format internals
+-------------------------------------------
+
+The Device Tree for most platforms is a static representation of
+the hardware capabilities. This is insufficient for platforms
+that need to dynamically insert Device Tree fragments into the
+live tree.
+
+This document explains the the Device Tree object format and
+modifications made to the Device Tree compiler, which make it possible.
+
+1. Simplified Problem Definition
+--------------------------------
+
+Assume we have a platform which boots using following simplified Device Tree.
+
+---- foo.dts -----------------------------------------------------------------
+ /* FOO platform */
+ / {
+ compatible = "corp,foo";
+
+ /* shared resources */
+ res: res {
+ };
+
+ /* On chip peripherals */
+ ocp: ocp {
+ /* peripherals that are always instantiated */
+ peripheral1 { ... };
+ };
+ };
+---- foo.dts -----------------------------------------------------------------
+
+We have a number of peripherals that after probing (using some undefined method)
+should result in different Device Tree configuration.
+
+We cannot boot with this static tree because due to the configuration of the
+foo platform there exist multiple conficting peripherals DT fragments.
+
+So for the bar peripheral we would have this:
+
+---- foo+bar.dts -------------------------------------------------------------
+ /* FOO platform + bar peripheral */
+ / {
+ compatible = "corp,foo";
+
+ /* shared resources */
+ res: res {
+ };
+
+ /* On chip peripherals */
+ ocp: ocp {
+ /* peripherals that are always instantiated */
+ peripheral1 { ... };
+
+ /* bar peripheral */
+ bar {
+ compatible = "corp,bar";
+ ... /* various properties and child nodes */
+ };
+ };
+ };
+---- foo+bar.dts -------------------------------------------------------------
+
+While for the baz peripheral we would have this:
+
+---- foo+baz.dts -------------------------------------------------------------
+ /* FOO platform + baz peripheral */
+ / {
+ compatible = "corp,foo";
+
+ /* shared resources */
+ res: res {
+ /* baz resources */
+ baz_res: res_baz { ... };
+ };
+
+ /* On chip peripherals */
+ ocp: ocp {
+ /* peripherals that are always instantiated */
+ peripheral1 { ... };
+
+ /* baz peripheral */
+ baz {
+ compatible = "corp,baz";
+ /* reference to another point in the tree */
+ ref-to-res = <&baz_res>;
+ ... /* various properties and child nodes */
+ };
+ };
+ };
+---- foo+baz.dts -------------------------------------------------------------
+
+We note that the baz case is more complicated, since the baz peripheral needs to
+reference another node in the DT tree.
+
+2. Device Tree Object Format Requirements
+-----------------------------------------
+
+Since the Device Tree is used for booting a number of very different hardware
+platforms it is imperative that we tread very carefully.
+
+2.a) No changes to the Device Tree binary format for the base tree. We cannot
+modify the tree format at all and all the information we require should be
+encoded using Device Tree itself. We can add nodes that can be safely ignored
+by both bootloaders and the kernel. The plugin dtbs are optionally tagged
+with a different magic number in the header but otherwise they're simple
+blobs.
+
+2.b) Changes to the DTS source format should be absolutely minimal, and should
+only be needed for the DT fragment definitions, and not the base boot DT.
+
+2.c) An explicit option should be used to instruct DTC to generate the required
+information needed for object resolution. Platforms that don't use the
+dynamic object format can safely ignore it.
+
+2.d) Finally, DT syntax changes should be kept to a minimum. It should be
+possible to express everything using the existing DT syntax.
+
+3. Implementation
+-----------------
+
+The basic unit of addressing in Device Tree is the phandle. Turns out it's
+relatively simple to extend the way phandles are generated and referenced
+so that it's possible to dynamically convert symbolic references (labels)
+to phandle values. This is a valid assumption as long as the author uses
+reference syntax and does not assign phandle values manually (which might
+be a problem with decompiled source files).
+
+We can roughly divide the operation into two steps.
+
+3.a) Compilation of the base board DTS file using the '-@' option
+generates a valid DT blob with an added __symbols__ node at the root node,
+containing a list of all nodes that are marked with a label.
+
+Using the foo.dts file above the following node will be generated;
+
+$ dtc -@ -O dtb -o foo.dtb -b 0 foo.dts
+$ fdtdump foo.dtb
+...
+/ {
+ ...
+ res {
+ ...
+ phandle = <0x00000001>;
+ ...
+ };
+ ocp {
+ ...
+ phandle = <0x00000002>;
+ ...
+ };
+ __symbols__ {
+ res="/res";
+ ocp="/ocp";
+ };
+};
+
+Notice that all the nodes that had a label have been recorded, and that
+phandles have been generated for them.
+
+This blob can be used to boot the board normally, the __symbols__ node will
+be safely ignored both by the bootloader and the kernel (the only loss will
+be a few bytes of memory and disk space).
+
+We generate a __symbols__ node to record nodes that had labels in the base
+tree (or subsequent loaded overlays) so that they can be matched up with
+references made to them in Device Tree objects.
+
+3.b) The Device Tree fragments must be compiled with the same option but they
+must also have a tag (/plugin/) that allows undefined references to nodes
+that are not present at compilation time to be recorded so that the runtime
+loader can fix them.
+
+So the bar peripheral's DTS format would be of the form:
+
+/dts-v1/;
+/plugin/; /* allow undefined references and record them */
+/ {
+ .... /* various properties for loader use; i.e. part id etc. */
+ fragment@0 {
+ target = <&ocp>;
+ __overlay__ {
+ /* bar peripheral */
+ bar {
+ compatible = "corp,bar";
+ ... /* various properties and child nodes */
+ }
+ };
+ };
+};
+
+Note that there's a target property that specifies the location where the
+contents of the overlay node will be placed, and it references the node
+in the foo.dts file.
+
+$ dtc -@ -O dtb -o bar.dtbo -b 0 bar.dts
+$ fdtdump bar.dtbo
+...
+/ {
+ ... /* properties */
+ fragment@0 {
+ target = <0xffffffff>;
+ __overlay__ {
+ bar {
+ compatible = "corp,bar";
+ ... /* various properties and child nodes */
+ }
+ };
+ };
+ __fixups__ {
+ ocp = "/fragment@0:target:0";
+ };
+};
+
+No __symbols__ node has been generated (no label in bar.dts).
+Note that the target's ocp label is undefined, so the phandle
+value is filled with the illegal value '0xffffffff', while a __fixups__
+node has been generated, which marks the location in the tree where
+the label lookup should store the runtime phandle value of the ocp node.
+
+The format of the __fixups__ node entry is
+
+ <label> = "<local-full-path>:<property-name>:<offset>"
+ [, "<local-full-path>:<property-name>:<offset>"...];
+
+ <label> Is the label we're referring
+ <local-full-path> Is the full path of the node the reference is
+ <property-name> Is the name of the property containing the
+ reference
+ <offset> The offset (in bytes) of where the property's
+ phandle value is located.
+
+Doing the same with the baz peripheral's DTS format is a little bit more
+involved, since baz contains references to local labels which require
+local fixups.
+
+/dts-v1/;
+/plugin/; /* allow undefined label references and record them */
+/ {
+ .... /* various properties for loader use; i.e. part id etc. */
+ fragment@0 {
+ target = <&res>;
+ __overlay__ {
+ /* baz resources */
+ baz_res: res_baz { ... };
+ };
+ };
+ fragment@1 {
+ target = <&ocp>;
+ __overlay__ {
+ /* baz peripheral */
+ baz {
+ compatible = "corp,baz";
+ /* reference to another point in the tree */
+ ref-to-res = <&baz_res>;
+ ... /* various properties and child nodes */
+ }
+ };
+ };
+};
+
+Note that &bar_res reference.
+
+$ dtc -@ -O dtb -o baz.dtbo -b 0 baz.dts
+$ fdtdump baz.dtbo
+...
+/ {
+ ... /* properties */
+ fragment@0 {
+ target = <0xffffffff>;
+ __overlay__ {
+ res_baz {
+ ....
+ phandle = <0x00000001>;
+ };
+ };
+ };
+ fragment@1 {
+ target = <0xffffffff>;
+ __overlay__ {
+ baz {
+ compatible = "corp,baz";
+ ... /* various properties and child nodes */
+ ref-to-res = <0x00000001>;
+ }
+ };
+ };
+ __fixups__ {
+ res = "/fragment@0:target:0";
+ ocp = "/fragment@1:target:0";
+ };
+ __local_fixups__ {
+ fragment@1 {
+ __overlay__ {
+ baz {
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