diff options
Diffstat (limited to 'target/linux/generic-2.6/image/lzma-loader/src/decompress.c')
| -rw-r--r-- | target/linux/generic-2.6/image/lzma-loader/src/decompress.c | 157 |
1 files changed, 0 insertions, 157 deletions
diff --git a/target/linux/generic-2.6/image/lzma-loader/src/decompress.c b/target/linux/generic-2.6/image/lzma-loader/src/decompress.c deleted file mode 100644 index 45ac509cd..000000000 --- a/target/linux/generic-2.6/image/lzma-loader/src/decompress.c +++ /dev/null @@ -1,157 +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 - * - * ??-Nov-2005 Mike Baker - * reorder the script as an lzma wrapper; do not depend on flash access - */ - -#include "LzmaDecode.h" - -#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; - } -} - -unsigned char *data; - -static int read_byte(void *object, unsigned char **buffer, UInt32 *bufferSize) -{ - *bufferSize = 1; - *buffer = data; - ++data; - return LZMA_RESULT_OK; -} - -static __inline__ unsigned char get_byte(void) -{ - unsigned char *buffer; - UInt32 fake; - - return read_byte(0, &buffer, &fake), *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 lzma_start[]; -extern char lzma_end[]; - -/* should be the first function */ -void entry(unsigned long icache_size, unsigned long icache_lsize, - unsigned long dcache_size, unsigned long dcache_lsize) -{ - unsigned int i; /* temp value */ - unsigned int osize; /* uncompressed size */ - volatile unsigned int arg0, arg1, arg2, arg3; - - /* restore argument registers */ - __asm__ __volatile__ ("ori %0, $12, 0":"=r"(arg0)); - __asm__ __volatile__ ("ori %0, $13, 0":"=r"(arg1)); - __asm__ __volatile__ ("ori %0, $14, 0":"=r"(arg2)); - __asm__ __volatile__ ("ori %0, $15, 0":"=r"(arg3)); - - ILzmaInCallback callback; - CLzmaDecoderState vs; - callback.Read = read_byte; - - data = lzma_start; - - /* 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 */ - 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 ((i = LzmaDecode(&vs, &callback, - (unsigned char*)KERNEL_ENTRY, osize, &osize)) == LZMA_RESULT_OK) - { - blast_dcache(dcache_size, dcache_lsize); - blast_icache(icache_size, icache_lsize); - - /* Jump to load address */ - ((void (*)(int a0, int a1, int a2, int a3)) KERNEL_ENTRY)(arg0, arg1, arg2, arg3); - } -} |