branch Attitude Adjustment

git-svn-id: svn://svn.openwrt.org/openwrt/branches/attitude_adjustment@33625 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 353 insertions, 0 deletions

diff --git a/target/linux/adm5120/image/lzma-loader/src/decompress.c b/target/linux/adm5120/image/lzma-loader/src/decompress.c
new file mode 100644
index 000000000..cd4b8fa60
--- /dev/null
+++ b/target/linux/adm5120/image/lzma-loader/src/decompress.c
@@ -0,0 +1,353 @@
+/*
+ *
+ * LZMA compressed kernel decompressor for ADM5120 boards
+ *
+ * Copyright (C) 2005 by Oleg I. Vdovikin <oleg@cs.msu.su>
+ * Copyright (C) 2007-2008 OpenWrt.org
+ * Copyright (C) 2007-2008 Gabor Juhos <juhosg@openwrt.org>
+ *
+ * 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
+ *
+ * 24-Mar-2007 Gabor Juhos
+ *   pass original values of the a0,a1,a2,a3 registers to the kernel
+ *
+ * 19-May-2007 Gabor Juhos
+ *   endiannes related cleanups
+ *   add support for decompressing an embedded kernel
+ *
+ */
+
+#include <stddef.h>
+
+#include "config.h"
+#include "printf.h"
+#include "LzmaDecode.h"
+
+#define ADM5120_FLASH_START	0x1fc00000	/* Flash start */
+#define ADM5120_FLASH_END	0x1fe00000	/* Flash end */
+
+#define KSEG0			0x80000000
+#define KSEG1			0xa0000000
+
+#define KSEG1ADDR(a)		((((unsigned)(a)) & 0x1fffffffU) | KSEG1)
+
+#define Index_Invalidate_I	0x00
+#define Index_Writeback_Inv_D   0x01
+
+#define cache_unroll(base,op)	\
+	__asm__ __volatile__(		\
+		".set noreorder;\n"		\
+		".set mips3;\n"			\
+		"cache %1, (%0);\n"		\
+		".set mips0;\n"			\
+		".set reorder\n"		\
+		:				\
+		: "r" (base),			\
+		  "i" (op));
+
+#ifdef LZMA_DEBUG
+#  define DBG(f, a...)	printf(f, ## a)
+#else
+#  define DBG(f, a...)	do {} while (0)
+#endif
+
+static __inline__ void blast_icache(unsigned long size, unsigned long lsize)
+{
+	unsigned long start = KSEG0;
+	unsigned long end = (start + size);
+
+	while(start < end) {
+		cache_unroll(start,Index_Invalidate_I);
+		start += lsize;
+	}
+}
+
+static __inline__ void blast_dcache(unsigned long size, unsigned long lsize)
+{
+	unsigned long start = KSEG0;
+	unsigned long end = (start + size);
+
+	while(start < end) {
+		cache_unroll(start,Index_Writeback_Inv_D);
+		start += lsize;
+	}
+}
+
+#define TRX_MAGIC       0x30524448      /* "HDR0" */
+#define TRX_ALIGN	0x1000
+
+struct trx_header {
+	unsigned int magic;		/* "HDR0" */
+	unsigned int len;		/* Length of file including header */
+	unsigned int crc32;		/* 32-bit CRC from flag_version to end of file */
+	unsigned int flag_version;	/* 0:15 flags, 16:31 version */
+	unsigned int offsets[3];	/* Offsets of partitions from start of header */
+};
+
+struct env_var {
+	char	*name;
+	char	*value;
+};
+
+/* beyound the image end, size not known in advance */
+extern unsigned char workspace[];
+extern void board_init(void);
+
+static CLzmaDecoderState lzma_state;
+
+typedef void (*kernel_entry)(unsigned long reg_a0, unsigned long reg_a1,
+	unsigned long reg_a2, unsigned long reg_a3);
+
+static int decompress_data(CLzmaDecoderState *vs, unsigned char *outStream,
+			UInt32 outSize);
+
+#ifdef CONFIG_PASS_KARGS
+#define ENVV(n,v)	{.name = (n), .value = (v)}
+struct env_var env_vars[] = {
+	ENVV("board_name",	CONFIG_BOARD_NAME),
+	ENVV(NULL, NULL)
+};
+#endif
+
+static void halt(void)
+{
+	printf("\nSystem halted!\n");
+	for(;;);
+}
+
+#if (LZMA_WRAPPER)
+extern unsigned char _lzma_data_start[];
+extern unsigned char _lzma_data_end[];
+
+unsigned char *data;
+unsigned long datalen;
+
+static __inline__ unsigned char get_byte(void)
+{
+	datalen--;
+	return *data++;
+}
+
+static void decompress_init(void)
+{
+	data = _lzma_data_start;
+	datalen = _lzma_data_end - _lzma_data_start;
+}
+
+static int decompress_data(CLzmaDecoderState *vs, unsigned char *outStream,
+			SizeT outSize)
+{
+	SizeT ip, op;
+
+	return LzmaDecode(vs, data, datalen, &ip, outStream, outSize, &op);
+}
+#endif /* LZMA_WRAPPER */
+
+#if !(LZMA_WRAPPER)
+
+#define FLASH_BANK_SIZE	(2<<20)
+
+static unsigned char *flash_base = (unsigned char *) KSEG1ADDR(ADM5120_FLASH_START);
+static unsigned long flash_ofs = 0;
+static unsigned long flash_max = 0;
+static unsigned long flash_ofs_mask = (FLASH_BANK_SIZE-1);
+
+static __inline__ unsigned char get_byte(void)
+{
+	return *(flash_base+flash_ofs++);
+}
+
+static int lzma_read_byte(void *object, const unsigned char **buffer,
+				SizeT *bufferSize)
+{
+	unsigned long len;
+
+	if (flash_ofs >= flash_max)
+		return LZMA_RESULT_DATA_ERROR;
+
+	len = flash_max-flash_ofs;
+
+#if (CONFIG_FLASH_SIZE > FLASH_BANK_SIZE)
+	if (flash_ofs < FLASH_BANK_SIZE) {
+		/* switch to bank 0 */
+		DBG("lzma_read_byte: switch to bank 0\n");
+
+		if (len > FLASH_BANK_SIZE-flash_ofs)
+			len = FLASH_BANK_SIZE-flash_ofs;
+	} else {
+		/* switch to bank 1 */
+		DBG("lzma_read_byte: switch to bank 1\n");
+	}
+#endif
+	DBG("lzma_read_byte: ofs=%08X, len=%08X\n", flash_ofs, len);
+
+	*buffer = flash_base+(flash_ofs & flash_ofs_mask);
+	*bufferSize = len;
+	flash_ofs += len;
+
+	return LZMA_RESULT_OK;
+}
+
+static ILzmaInCallback lzma_callback = {
+	.Read	= lzma_read_byte,
+};
+
+static __inline__ unsigned int read_le32(void *buf)
+{
+	unsigned char *p = buf;
+
+	return ((unsigned int)p[0] + ((unsigned int)p[1] << 8) +
+		((unsigned int)p[2] << 16) +((unsigned int)p[3] << 24));
+}
+
+static void decompress_init(void)
+{
+	struct trx_header *hdr = NULL;
+	unsigned long kofs,klen;
+
+    	printf("Looking for TRX header... ");
+	/* look for trx header, 32-bit data access */
+	for (flash_ofs = 0; flash_ofs < FLASH_BANK_SIZE; flash_ofs += TRX_ALIGN) {
+		if (read_le32(&flash_base[flash_ofs]) == TRX_MAGIC) {
+			hdr = (struct trx_header *)&flash_base[flash_ofs];
+			break;
+		}
+	}
+
+	if (hdr == NULL) {
+		printf("not found!\n");
+		/* no compressed kernel found, halting */
+		halt();
+	}
+
+	/* compressed kernel is in the partition 0 or 1 */
+	kofs = read_le32(&hdr->offsets[1]);
+	if (kofs == 0 || kofs > 65536) {
+		klen = kofs-read_le32(&hdr->offsets[0]);
+		kofs = read_le32(&hdr->offsets[0]);
+	} else {
+		klen = read_le32(&hdr->offsets[2]);
+		if (klen > kofs)
+			klen -= kofs;
+		else
+			klen = read_le32(&hdr->len)-kofs;
+	}
+
+	printf("found at %08X, kernel:%08X len:%08X\n", flash_ofs,
+		kofs, klen);
+
+	flash_ofs += kofs;
+	flash_max = flash_ofs+klen;
+}
+
+static int decompress_data(CLzmaDecoderState *vs, unsigned char *outStream,
+			SizeT outSize)
+{
+	SizeT op;
+
+#if 0
+	vs->Buffer = data;
+	vs->BufferLim = datalen;
+#endif
+
+	return LzmaDecode(vs, &lzma_callback, outStream, outSize, &op);
+}
+#endif /* !(LZMA_WRAPPER) */
+
+/* should be the first function */
+void decompress_entry(unsigned long reg_a0, unsigned long reg_a1,
+	unsigned long reg_a2, unsigned long reg_a3,
+	unsigned long icache_size, unsigned long icache_lsize,
+	unsigned long dcache_size, unsigned long dcache_lsize)
+{
+	unsigned char props[LZMA_PROPERTIES_SIZE];
+	unsigned int i;  /* temp value */
+	SizeT osize; /* uncompressed size */
+	int res;
+
+	board_init();
+
+	printf("\n\nLZMA loader for " CONFIG_BOARD_NAME
+			", Copyright (C) 2007-2008 OpenWrt.org\n\n");
+
+	decompress_init();
+
+	/* lzma args */
+	for (i = 0; i < LZMA_PROPERTIES_SIZE; i++)
+		props[i] = get_byte();
+
+	/* skip rest of the LZMA coder property */
+	/* read the lower half of uncompressed size in the header */
+	osize = ((SizeT)get_byte()) +
+		((SizeT)get_byte() << 8) +
+		((SizeT)get_byte() << 16) +
+		((SizeT)get_byte() << 24);
+
+	/* skip rest of the header (upper half of uncompressed size) */
+	for (i = 0; i < 4; i++)
+		get_byte();
+
+	res = LzmaDecodeProperties(&lzma_state.Properties, props,
+					LZMA_PROPERTIES_SIZE);
+	if (res != LZMA_RESULT_OK) {
+		printf("Incorrect LZMA stream properties!\n");
+		halt();
+	}
+
+	printf("decompressing kernel... ");
+
+	lzma_state.Probs = (CProb *)workspace;
+	res = decompress_data(&lzma_state, (unsigned char *)LOADADDR, osize);
+
+	if (res != LZMA_RESULT_OK) {
+		printf("failed, ");
+		switch (res) {
+		case LZMA_RESULT_DATA_ERROR:
+			printf("data error!\n");
+			break;
+		default:
+			printf("unknown error %d!\n", res);
+		}
+		halt();
+	} else
+		printf("done!\n");
+
+	blast_dcache(dcache_size, dcache_lsize);
+	blast_icache(icache_size, icache_lsize);
+
+	printf("launching kernel...\n\n");
+
+#ifdef CONFIG_PASS_KARGS
+	reg_a0 = 0;
+	reg_a1 = 0;
+	reg_a2 = (unsigned long)env_vars;
+	reg_a3 = 0;
+#endif
+	/* Jump to load address */
+	((kernel_entry) LOADADDR)(reg_a0, reg_a1, reg_a2, reg_a3);
+}