diff options
Diffstat (limited to 'target/linux/brcm47xx/image/lzma-loader/src/decompress.c')
| -rw-r--r-- | target/linux/brcm47xx/image/lzma-loader/src/decompress.c | 186 |
1 files changed, 0 insertions, 186 deletions
diff --git a/target/linux/brcm47xx/image/lzma-loader/src/decompress.c b/target/linux/brcm47xx/image/lzma-loader/src/decompress.c deleted file mode 100644 index 05681b1..0000000 --- a/target/linux/brcm47xx/image/lzma-loader/src/decompress.c +++ /dev/null @@ -1,186 +0,0 @@ -/* - * 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 - * - */ - -#include "LzmaDecode.h" - -#define BCM4710_FLASH 0x1fc00000 /* Flash */ - -#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)); - -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" */ - -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 */ -}; - -#define EDIMAX_PS_HEADER_MAGIC 0x36315350 /* "PS16" */ -#define EDIMAX_PS_HEADER_LEN 0xc /* 12 bytes long for edimax header */ - -/* beyound the image end, size not known in advance */ -extern unsigned char workspace[]; - -unsigned int offset; -unsigned char *data; - -/* flash access should be aligned, so wrapper is used */ -/* read byte from the flash, all accesses are 32-bit aligned */ -static int read_byte(void *object, unsigned char **buffer, UInt32 *bufferSize) -{ - static unsigned int val; - - if (((unsigned int)offset % 4) == 0) { - val = *(unsigned int *)data; - data += 4; - } - - *bufferSize = 1; - *buffer = ((unsigned char *)&val) + (offset++ & 3); - - return LZMA_RESULT_OK; -} - -static __inline__ unsigned char get_byte(void) -{ - unsigned char *buffer; - UInt32 fake; - - return read_byte(0, &buffer, &fake), *buffer; -} - -/* should be the first function */ -void entry(unsigned long icache_size, unsigned long icache_lsize, - unsigned long dcache_size, unsigned long dcache_lsize, - unsigned long fw_arg0, unsigned long fw_arg1, - unsigned long fw_arg2, unsigned long fw_arg3) -{ - unsigned int i; /* temp value */ - unsigned int lc; /* literal context bits */ - unsigned int lp; /* literal pos state bits */ - unsigned int pb; /* pos state bits */ - unsigned int osize; /* uncompressed size */ - - ILzmaInCallback callback; - callback.Read = read_byte; - - /* look for trx header, 32-bit data access */ - for (data = ((unsigned char *) KSEG1ADDR(BCM4710_FLASH)); - ((struct trx_header *)data)->magic != TRX_MAGIC && - ((struct trx_header *)data)->magic != EDIMAX_PS_HEADER_MAGIC; - data += 65536); - - if (((struct trx_header *)data)->magic == EDIMAX_PS_HEADER_MAGIC) - data += EDIMAX_PS_HEADER_LEN; - /* compressed kernel is in the partition 0 or 1 */ - if (((struct trx_header *)data)->offsets[1] > 65536) - data += ((struct trx_header *)data)->offsets[0]; - else - data += ((struct trx_header *)data)->offsets[1]; - - offset = 0; - - /* lzma args */ - i = get_byte(); - lc = i % 9, i = i / 9; - lp = i % 5, pb = i / 5; - - /* skip rest of the LZMA coder property */ - for (i = 0; i < 4; i++) - get_byte(); - - /* 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) */ - for (i = 0; i < 4; i++) - get_byte(); - - /* decompress kernel */ - if (LzmaDecode(workspace, ~0, lc, lp, pb, &callback, - (unsigned char*)LOADADDR, osize, &i) == LZMA_RESULT_OK) - { - blast_dcache(dcache_size, dcache_lsize); - blast_icache(icache_size, icache_lsize); - - /* Jump to load address */ - ((void (*)(unsigned long, unsigned long, unsigned long, - unsigned long)) LOADADDR)(fw_arg0, fw_arg1, fw_arg2, - fw_arg3); - } -} |