commonlib: Add commonlib/bsd

This patch creates a new commonlib/bsd subdirectory with a similar
purpose to the existing commonlib, with the difference that all files
under this subdirectory shall be licensed under the BSD-3-Clause license
(or compatible permissive license). The goal is to allow more code to be
shared with libpayload in the future.

Initially, I'm going to move a few files there that have already been
BSD-licensed in the existing commonlib. I am also exracting most
contents of the often-needed <commonlib/helpers.h> as long as they have
either been written by me (and are hereby relicensed) or have an
existing equivalent in BSD-licensed libpayload code. I am also
relicensing <commonlib/compression.h> (written by me) and
<commonlib/compiler.h> (same stuff exists in libpayload).

Finally, I am extracting the cb_err error code definitions from
<types.h> into a new BSD-licensed header so that future commonlib/bsd
code can build upon a common set of error values. I am making the
assumption here that the enum constants and the half-sentence fragments
of documentation next to them by themselves do not meet the threshold of
copyrightability.

Change-Id: I316cea70930f131e8e93d4218542ddb5ae4b63a2
Signed-off-by: Julius Werner <jwerner@chromium.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/38420
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Rudolph <siro@das-labor.org>

3 files changed, 8 insertions, 4 deletions

diff --git a/util/cbfstool/Makefile.inc b/util/cbfstool/Makefile.inc
index 066ef3495c..d8ad959f0d 100644
--- a/util/cbfstool/Makefile.inc
+++ b/util/cbfstool/Makefile.inc
@@ -113,8 +113,8 @@ TOOLCPPFLAGS += -D_XOPEN_SOURCE=700 # strdup() from string.h
 TOOLCPPFLAGS += -I$(top)/util/cbfstool/flashmap
 TOOLCPPFLAGS += -I$(top)/util/cbfstool
 TOOLCPPFLAGS += -I$(objutil)/cbfstool
-TOOLCPPFLAGS += -I$(top)/src/commonlib/include
-TOOLCPPFLAGS += -include $(top)/src/commonlib/include/commonlib/compiler.h
+TOOLCPPFLAGS += -I$(top)/src/commonlib/include -I$(top)/src/commonlib/bsd/include
+TOOLCPPFLAGS += -include $(top)/src/commonlib/bsd/include/commonlib/bsd/compiler.h
 TOOLCPPFLAGS += -I$(VBOOT_SOURCE)/firmware/include
 TOOLCPPFLAGS += -I$(VBOOT_SOURCE)/firmware/2lib/include
 # UEFI header file support. It's not pretty, but that's what we currently
@@ -163,6 +163,10 @@ $(objutil)/cbfstool/%.o: $(top)/src/commonlib/%.c
 	printf "    HOSTCC     $(subst $(objutil)/,,$(@))\n"
 	$(HOSTCC) $(TOOLCPPFLAGS) $(TOOLCFLAGS) $(HOSTCFLAGS) -c -o $@ $<
 
+$(objutil)/cbfstool/%.o: $(top)/src/commonlib/bsd/%.c
+	printf "    HOSTCC     $(subst $(objutil)/,,$(@))\n"
+	$(HOSTCC) $(TOOLCPPFLAGS) $(TOOLCFLAGS) $(HOSTCFLAGS) -c -o $@ $<
+
 $(objutil)/cbfstool/%.o: $(top)/util/cbfstool/lz4/lib/%.c
 	printf "    HOSTCC     $(subst $(objutil)/,,$(@))\n"
 	$(HOSTCC) $(TOOLCPPFLAGS) $(TOOLCFLAGS) $(HOSTCFLAGS) -c -o $@ $<
diff --git a/util/cbfstool/cbfs-mkstage.c b/util/cbfstool/cbfs-mkstage.c
index 6071437d05..be920b4598 100644
--- a/util/cbfstool/cbfs-mkstage.c
+++ b/util/cbfstool/cbfs-mkstage.c
@@ -26,7 +26,7 @@
 #include "cbfs.h"
 #include "rmodule.h"
 
-#include <commonlib/compression.h>
+#include <commonlib/bsd/compression.h>
 
 /* Checks if program segment contains the ignored section */
 static int is_phdr_ignored(Elf64_Phdr *phdr, Elf64_Shdr *shdr)
diff --git a/util/cbfstool/compress.c b/util/cbfstool/compress.c
index a6a0df4dd1..993809426f 100644
--- a/util/cbfstool/compress.c
+++ b/util/cbfstool/compress.c
@@ -23,7 +23,7 @@
 #include <stdlib.h>
 #include "common.h"
 #include "lz4/lib/lz4frame.h"
-#include <commonlib/compression.h>
+#include <commonlib/bsd/compression.h>
 
 static int lz4_compress(char *in, int in_len, char *out, int *out_len)
 {