diff options
Diffstat (limited to 'target/linux/adm5120/image/lzma-loader/src/decompress.c')
| -rw-r--r-- | target/linux/adm5120/image/lzma-loader/src/decompress.c | 353 |
1 files changed, 0 insertions, 353 deletions
diff --git a/target/linux/adm5120/image/lzma-loader/src/decompress.c b/target/linux/adm5120/image/lzma-loader/src/decompress.c deleted file mode 100644 index cd4b8fa605..0000000000 --- a/target/linux/adm5120/image/lzma-loader/src/decompress.c +++ /dev/null @@ -1,353 +0,0 @@ -/* - * - * 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); -} |