diff options
Diffstat (limited to 'target/linux/adm5120-2.6/image/lzma-loader/src/decompress.c')
| -rw-r--r-- | target/linux/adm5120-2.6/image/lzma-loader/src/decompress.c | 228 |
1 files changed, 142 insertions, 86 deletions
diff --git a/target/linux/adm5120-2.6/image/lzma-loader/src/decompress.c b/target/linux/adm5120-2.6/image/lzma-loader/src/decompress.c index ec63ccb65..f867e20dc 100644 --- a/target/linux/adm5120-2.6/image/lzma-loader/src/decompress.c +++ b/target/linux/adm5120-2.6/image/lzma-loader/src/decompress.c @@ -1,7 +1,8 @@ /* - * LZMA compressed kernel decompressor for bcm947xx boards + * LZMA compressed kernel decompressor for ADM5120 boards * * Copyright (C) 2005 by Oleg I. Vdovikin <oleg@cs.msu.su> + * Copyright (C) 2007 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 @@ -33,11 +34,18 @@ * 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 "LzmaDecode.h" -#define BCM4710_FLASH 0x1fc00000 /* Flash */ +#define ADM5120_FLASH_START 0x1fc00000 /* Flash start */ +#define ADM5120_FLASH_END 0x1fe00000 /* Flash end */ #define KSEG0 0x80000000 #define KSEG1 0xa0000000 @@ -54,7 +62,7 @@ "cache %1, (%0);\n" \ ".set mips0;\n" \ ".set reorder\n" \ - : \ + : \ : "r" (base), \ "i" (op)); @@ -81,6 +89,7 @@ static __inline__ void blast_dcache(unsigned long size, unsigned long lsize) } #define TRX_MAGIC 0x30524448 /* "HDR0" */ +#define TRX_ALIGN 0x1000 struct trx_header { unsigned int magic; /* "HDR0" */ @@ -92,26 +101,24 @@ struct trx_header { /* beyound the image end, size not known in advance */ extern unsigned char workspace[]; +#if LZMA_WRAPPER +extern unsigned char _lzma_data_start[]; +extern unsigned char _lzma_data_end[]; +#endif + +extern void board_init(void); +extern void board_putc(int ch); -unsigned int offset; unsigned char *data; +unsigned long datalen; typedef void (*kernel_entry)(unsigned long reg_a0, unsigned long reg_a1, unsigned long reg_a2, unsigned long reg_a3); -/* 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); + *buffer = data++; return LZMA_RESULT_OK; } @@ -121,10 +128,90 @@ static __inline__ unsigned char get_byte(void) unsigned char *buffer; UInt32 fake; - return read_byte(0, &buffer, &fake), *buffer; + read_byte(0, &buffer, &fake); + return *buffer; +} + +static __inline__ unsigned int read_le32(void *buf) +{ + unsigned char *p; + + p = buf; + return ((unsigned int)p[0] + ((unsigned int)p[1] << 8) + + ((unsigned int)p[2] << 16) +((unsigned int)p[3] << 24)); +} + +static void print_char(char ch) +{ + if (ch == '\n') + board_putc('\r'); + board_putc(ch); +} + +static void print_str(char * str) +{ + while ( *str != 0 ) + print_char(*str++); +} + +static void print_hex(int val) +{ + int i; + int tmp; + + print_str("0x"); + for ( i=0 ; i<8 ; i++ ) { + tmp = (val >> ((7-i) * 4 )) & 0xf; + tmp = tmp < 10 ? (tmp + '0') : (tmp + 'A' - 10); + board_putc(tmp); + } +} + +static unsigned char *find_kernel(void) +{ + struct trx_header *hdr; + unsigned char *ret; + + print_str("Looking for TRX header... "); + /* look for trx header, 32-bit data access */ + hdr = NULL; + for (ret = ((unsigned char *) KSEG1ADDR(ADM5120_FLASH_START)); + ret < ((unsigned char *)KSEG1ADDR(ADM5120_FLASH_END)); + ret += TRX_ALIGN) { + + if (read_le32(ret) == TRX_MAGIC) { + hdr = (struct trx_header *)ret; + break; + } + } + + if (hdr == NULL) { + print_str("not found!\n"); + return NULL; + } + + print_str("found at "); + print_hex((unsigned int)ret); + print_str(", kernel in partition "); + + /* compressed kernel is in the partition 0 or 1 */ + if ((read_le32(&hdr->offsets[1]) == 0) || + (read_le32(&hdr->offsets[1]) > 65536)) { + ret += read_le32(&hdr->offsets[0]); + print_str("0\n"); + } else { + ret += read_le32(&hdr->offsets[1]); + print_str("1\n"); + } + + return ret; } -int uart_write_str(char * str); +static void halt(void) +{ + print_str("\nSystem halted!\n"); + for(;;); +} /* should be the first function */ void decompress_entry(unsigned long reg_a0, unsigned long reg_a1, @@ -137,23 +224,27 @@ void decompress_entry(unsigned long reg_a0, unsigned long reg_a1, unsigned int lp; /* literal pos state bits */ unsigned int pb; /* pos state bits */ unsigned int osize; /* uncompressed size */ - + int res; +#if !(LZMA_WRAPPER) ILzmaInCallback callback; - callback.Read = read_byte; +#endif - uart_write_str("decompress kernel ... "); + board_init(); - /* look for trx header, 32-bit data access */ - for (data = ((unsigned char *) KSEG1ADDR(BCM4710_FLASH)); - ((struct trx_header *)data)->magic != TRX_MAGIC; data += 65536); + print_str("\n\nLZMA loader for ADM5120, Copyright (C) 2007 OpenWrt.org\n\n"); - /* 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]; +#if LZMA_WRAPPER + data = _lzma_data_start; + datalen = _lzma_data_end - _lzma_data_start; +#else + data = find_kernel(); + if (data == NULL) { + /* no compressed kernel found, halting */ + halt(); + } - offset = 0; + datalen = ((unsigned char *) KSEG1ADDR(ADM5120_FLASH_END))-data; +#endif /* lzma args */ i = get_byte(); @@ -174,68 +265,33 @@ void decompress_entry(unsigned long reg_a0, unsigned long reg_a1, for (i = 0; i < 4; i++) get_byte(); + print_str("decompressing kernel... "); + /* 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 */ - uart_write_str("ok\r\n"); - ((kernel_entry) LOADADDR)(reg_a0, reg_a1, reg_a2, reg_a3); +#if LZMA_WRAPPER + res = LzmaDecode(workspace, ~0, lc, lp, pb, data, datalen, + (unsigned char*)LOADADDR, osize, &i); +#else + callback.Read = read_byte; + res = LzmaDecode(workspace, ~0, lc, lp, pb, &callback, + (unsigned char*)LOADADDR, osize, &i); +#endif + if (res != LZMA_RESULT_OK) { + print_str("failed, LzmaDecode error: "); + print_hex(res); + print_str("\n"); + halt(); } - uart_write_str("failed\r\n"); - while (1 ); -} -/* ********************************************************************* - * - * ADM5120 UART driver File: dev_adm_uart.c - * - * This is a console device driver for an ADM5120 UART - * - ********************************************************************* - * - * Copyright 2006 - * Compex Systems. All rights reserved. - * - ********************************************************************* */ - -#define READCSR(r) *(volatile UInt32 *)(0xB2600000+(r)) -#define WRITECSR(r,v) *(volatile UInt32 *)(0xB2600000+(r)) = v - -#define UART_DR_REG 0x00 -#define UART_FR_REG 0x18 -#define UART_TX_FIFO_FULL 0x20 - -int uart_write(int val) -{ - WRITECSR(UART_DR_REG, val); - while ( (READCSR(UART_FR_REG) & UART_TX_FIFO_FULL) ); - return 0; -} + print_str("done!\n"); -int uart_write_str(char * str) -{ - while ( *str != 0 ) { - uart_write ( *str++ ); - } - return 0; -} + blast_dcache(dcache_size, dcache_lsize); + blast_icache(icache_size, icache_lsize); -int uart_write_hex(int val) -{ - int i; - int tmp; - - uart_write_str("0x"); - for ( i=0 ; i<8 ; i++ ) { - tmp = (val >> ((7-i) * 4 )) & 0xf; - tmp = tmp < 10 ? (tmp + '0') : (tmp + 'A' - 10); - uart_write(tmp); - } - uart_write_str("\r\n"); - return 0; + print_str("launching kernel...\n\n"); + + /* Jump to load address */ + ((kernel_entry) LOADADDR)(reg_a0, reg_a1, reg_a2, reg_a3); } + |