libpayload: Add liblzma, libcbfs

Add cbfs core from coreboot into libpayload, and to support lzma decode,
add coreboot's lzma code, too. Carl-Daniel agreed to relicense the
lzmadecode wrapper as BSD-l, solving licensing problems.

Change-Id: Id28990fe7e951d99447e265a4880d70a8f208dd2
Signed-off-by: Patrick Georgi <patrick.georgi@secunet.com>
Reviewed-on: http://review.coreboot.org/115
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Reviewed-by: Marc Jones <marcj303@gmail.com>

payloads/libpayload/liblzma/lzma.c

@@ -0,0 +1,47 @@
+/*
+ * coreboot interface to memory-saving variant of LZMA decoder
+ *
+ * Copyright (C) 2006 Carl-Daniel Hailfinger
+ * Released under the BSD license
+ *
+ * Parts of this file are based on C/7zip/Compress/LZMA_C/LzmaTest.c from the LZMA
+ * SDK 4.42, which is written and distributed to public domain by Igor Pavlov.
+ *
+ */
+
+#include <lzma.h>
+#include <stdio.h>
+#include <string.h>
+#include "lzmadecode.c"
+
+unsigned long ulzma(unsigned char * src, unsigned char * dst)
+{
+	unsigned char properties[LZMA_PROPERTIES_SIZE];
+	UInt32 outSize;
+	SizeT inProcessed;
+	SizeT outProcessed;
+	int res;
+	CLzmaDecoderState state;
+	SizeT mallocneeds;
+	unsigned char scratchpad[15980];
+
+	memcpy(properties, src, LZMA_PROPERTIES_SIZE);
+	outSize = *(UInt32 *)(src + LZMA_PROPERTIES_SIZE);
+	if (LzmaDecodeProperties(&state.Properties, properties, LZMA_PROPERTIES_SIZE) != LZMA_RESULT_OK) {
+		printf("lzma: Incorrect stream properties.\n");
+		return 0;
+	}
+	mallocneeds = (LzmaGetNumProbs(&state.Properties) * sizeof(CProb));
+	if (mallocneeds > 15980) {
+		printf("lzma: Decoder scratchpad too small!\n");
+		return 0;
+	}
+	state.Probs = (CProb *)scratchpad;
+	res = LzmaDecode(&state, src + LZMA_PROPERTIES_SIZE + 8, (SizeT)0xffffffff, &inProcessed,
+		dst, outSize, &outProcessed);
+	if (res != 0) {
+		printf("lzma: Decoding error = %d\n", res);
+		return 0;
+	}
+	return outSize;
+}