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Diffstat (limited to 'target/linux/adm8668/image/lzma-loader/src/decompress.c')
-rw-r--r--target/linux/adm8668/image/lzma-loader/src/decompress.c118
1 files changed, 118 insertions, 0 deletions
diff --git a/target/linux/adm8668/image/lzma-loader/src/decompress.c b/target/linux/adm8668/image/lzma-loader/src/decompress.c
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index 0000000000..f328058a16
--- /dev/null
+++ b/target/linux/adm8668/image/lzma-loader/src/decompress.c
@@ -0,0 +1,118 @@
+/*
+ * LZMA compressed kernel decompressor for bcm947xx boards
+ *
+ * Copyright (C) 2005 by Oleg I. Vdovikin <oleg@cs.msu.su>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ *
+ * Please note, this was code based on the bunzip2 decompressor code
+ * by Manuel Novoa III (mjn3@codepoet.org), although the only thing left
+ * is an idea and part of original vendor code
+ *
+ *
+ * 12-Mar-2005 Mineharu Takahara <mtakahar@yahoo.com>
+ * pass actual output size to decoder (stream mode
+ * compressed input is not a requirement anymore)
+ *
+ * 24-Apr-2005 Oleg I. Vdovikin
+ * reordered functions using lds script, removed forward decl
+ *
+ * ??-Nov-2005 Mike Baker
+ * reorder the script as an lzma wrapper; do not depend on flash access
+ */
+
+#include "LzmaDecode.h"
+#include <exports.h>
+
+#define KSEG0ADDR(addr) (0x80000000|addr)
+
+register volatile gd_t *gd asm ("k0");
+unsigned char *data;
+
+static __inline__ unsigned char get_byte()
+{
+ unsigned char *buffer;
+
+ buffer = data;
+ data++;
+
+ return *buffer;
+}
+
+/* This puts lzma workspace 128k below RAM end.
+ * That should be enough for both lzma and stack
+ */
+static char *buffer = (char *)(RAMSTART + RAMSIZE - 0x00020000);
+extern char _binary_vmlinux_lzma_start[];
+extern char _binary_vmlinux_lzma_end[];
+extern char lzma_start[];
+extern char lzma_end[];
+
+/* should be the first function */
+void entry(unsigned int arg0, unsigned int arg1,
+ unsigned int arg2, unsigned int arg3)
+{
+ unsigned int i; /* temp value */
+ unsigned int isize; /* compressed size */
+ unsigned int osize; /* uncompressed size */
+ int argc = arg0;
+ char **argv = (char **)arg1;
+ char **envp = (char **)arg2;
+
+ CLzmaDecoderState vs;
+
+ data = (unsigned char *)_binary_vmlinux_lzma_start;
+ isize = _binary_vmlinux_lzma_end - _binary_vmlinux_lzma_start + 1;
+
+ puts("\nLZMA kernel loader\n");
+
+ printf("lzma data @ %#x - %#x\n", _binary_vmlinux_lzma_start, _binary_vmlinux_lzma_end);
+ printf("load addr @ %#x\n\n", KERNEL_ENTRY);
+ printf("jump table @ %#x\n", gd->jt[3]);
+
+ /* lzma args */
+ i = get_byte();
+ vs.Properties.lc = i % 9, i = i / 9;
+ vs.Properties.lp = i % 5, vs.Properties.pb = i / 5;
+
+ vs.Probs = (CProb *)buffer;
+
+ /* skip rest of the LZMA coder property */
+ data += 4;
+
+ /* read the lower half of uncompressed size in the header */
+ osize = ((unsigned int)get_byte()) +
+ ((unsigned int)get_byte() << 8) +
+ ((unsigned int)get_byte() << 16) +
+ ((unsigned int)get_byte() << 24);
+
+ /* skip rest of the header (upper half of uncompressed size) */
+ data += 4;
+
+ /* decompress kernel */
+ puts("\nDecompressing kernel...");
+ if ((i = LzmaDecode(&vs,
+ (unsigned char*)data, isize, &isize,
+ (unsigned char*)KERNEL_ENTRY, osize, &osize)) == LZMA_RESULT_OK)
+ {
+ puts("success!\n");
+
+ /* Jump to load address */
+// ((void (*)(int a0, int a1, int a2, int a3))KERNEL_ENTRY)(0,0,0,0);
+ ((void (*)(int a0, int a1, int a2, int a3))KERNEL_ENTRY)(arg0, arg1, arg2, arg3);
+ }
+ puts("failure!\n");
+}