2 * LZMA compressed kernel loader for Atheros AR7XXX/AR9XXX based boards
4 * Copyright (C) 2011 Gabor Juhos <juhosg@openwrt.org>
6 * Some parts of this code was based on the OpenWrt specific lzma-loader
7 * for the BCM47xx and ADM5120 based boards:
8 * Copyright (C) 2004 Manuel Novoa III (mjn3@codepoet.org)
9 * Copyright (C) 2005 Mineharu Takahara <mtakahar@yahoo.com>
10 * Copyright (C) 2005 by Oleg I. Vdovikin <oleg@cs.msu.su>
12 * The image_header structure has been taken from the U-Boot project.
13 * (C) Copyright 2008 Semihalf
14 * (C) Copyright 2000-2005
15 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
17 * This program is free software; you can redistribute it and/or modify it
18 * under the terms of the GNU General Public License version 2 as published
19 * by the Free Software Foundation.
28 #include "LzmaDecode.h"
30 #define KSEG0 0x80000000
31 #define KSEG1 0xa0000000
33 #define KSEG1ADDR(a) ((((unsigned)(a)) & 0x1fffffffU) | KSEG1)
38 # define DBG(f, a...) printf(f, ## a)
40 # define DBG(f, a...) do {} while (0)
43 /* beyond the image end, size not known in advance */
44 extern unsigned char workspace[];
47 extern void board_init(void);
49 static CLzmaDecoderState lzma_state;
50 static unsigned char *lzma_data;
51 static unsigned long lzma_datasize;
52 static unsigned long lzma_outsize;
53 static unsigned long kernel_la;
55 static void halt(void)
57 printf("\nSystem halted!\n");
61 static __inline__ unsigned char lzma_get_byte(void)
71 static int lzma_init_props(void)
73 unsigned char props[LZMA_PROPERTIES_SIZE];
77 /* read lzma properties */
78 for (i = 0; i < LZMA_PROPERTIES_SIZE; i++)
79 props[i] = lzma_get_byte();
81 /* read the lower half of uncompressed size in the header */
82 lzma_outsize = ((SizeT) lzma_get_byte()) +
83 ((SizeT) lzma_get_byte() << 8) +
84 ((SizeT) lzma_get_byte() << 16) +
85 ((SizeT) lzma_get_byte() << 24);
87 /* skip rest of the header (upper half of uncompressed size) */
88 for (i = 0; i < 4; i++)
91 res = LzmaDecodeProperties(&lzma_state.Properties, props,
92 LZMA_PROPERTIES_SIZE);
96 static int lzma_decompress(unsigned char *outStream)
101 lzma_state.Probs = (CProb *) workspace;
103 ret = LzmaDecode(&lzma_state, lzma_data, lzma_datasize, &ip, outStream,
106 if (ret != LZMA_RESULT_OK) {
109 DBG("LzmaDecode error %d at %08x, osize:%d ip:%d op:%d\n",
110 ret, lzma_data + ip, lzma_outsize, ip, op);
112 for (i = 0; i < 16; i++)
113 DBG("%02x ", lzma_data[ip + i]);
121 static void lzma_init_data(void)
123 extern unsigned char _lzma_data_start[];
124 extern unsigned char _lzma_data_end[];
126 kernel_la = LOADADDR;
127 lzma_data = _lzma_data_start;
128 lzma_datasize = _lzma_data_end - _lzma_data_start;
131 void loader_main(unsigned long reg_a0, unsigned long reg_a1,
132 unsigned long reg_a2, unsigned long reg_a3)
134 void (*kernel_entry) (unsigned long, unsigned long, unsigned long,
140 printf("\n\nOpenWrt kernel loader for BCM63XX\n");
141 printf("Copyright (C) 2011 Gabor Juhos <juhosg@openwrt.org>\n");
142 printf("Copyright (C) 2014 Jonas Gorski <jogo@openwrt.org>\n");
146 res = lzma_init_props();
147 if (res != LZMA_RESULT_OK) {
148 printf("Incorrect LZMA stream properties!\n");
152 printf("Decompressing kernel... ");
154 res = lzma_decompress((unsigned char *) kernel_la);
155 if (res != LZMA_RESULT_OK) {
158 case LZMA_RESULT_DATA_ERROR:
159 printf("data error!\n");
162 printf("unknown error %d!\n", res);
169 flush_cache(kernel_la, lzma_outsize);
171 printf("Starting kernel at %08x...\n\n", kernel_la);
173 kernel_entry = (void *) kernel_la;
174 kernel_entry(reg_a0, reg_a1, reg_a2, reg_a3);