/*
+ * $Id$
+ *
* LZMA compressed kernel decompressor for ADM5120 boards
*
* Copyright (C) 2005 by Oleg I. Vdovikin <oleg@cs.msu.su>
#include <stddef.h>
#include "config.h"
+#include "printf.h"
#include "LzmaDecode.h"
#define ADM5120_FLASH_START 0x1fc00000 /* Flash start */
: "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 int offsets[3]; /* Offsets of partitions from start of 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);
-
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);
+
+typedef void (*kernel_entry)(unsigned long reg_a0, unsigned long reg_a1,
+ unsigned long reg_a2, unsigned long reg_a3);
+
+static int decompress_data(unsigned char *buffer, UInt32 bufferSize,
+ int lc, int lp, int pb, unsigned char *outStream, UInt32 outSize,
+ UInt32 *outSizeProcessed);
+
#ifdef CONFIG_PASS_KARGS
#define ENVV(n,v) {.name = (n), .value = (v)}
struct env_var env_vars[] = {
};
#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;
-typedef void (*kernel_entry)(unsigned long reg_a0, unsigned long reg_a1,
- unsigned long reg_a2, unsigned long reg_a3);
-
-static int read_byte(void *object, unsigned char **buffer, UInt32 *bufferSize)
+static __inline__ unsigned char get_byte(void)
{
- *bufferSize = 1;
- *buffer = data++;
-
- return LZMA_RESULT_OK;
+ datalen--;
+ return *data++;
}
-static __inline__ unsigned char get_byte(void)
+static void decompress_init(void)
{
- unsigned char *buffer;
- UInt32 fake;
-
- read_byte(0, &buffer, &fake);
- return *buffer;
+ data = _lzma_data_start;
+ datalen = _lzma_data_end - _lzma_data_start;
}
-static __inline__ unsigned int read_le32(void *buf)
+static int decompress_data(unsigned char *buffer, UInt32 bufferSize,
+ int lc, int lp, int pb, unsigned char *outStream, UInt32 outSize,
+ UInt32 *outSizeProcessed)
{
- 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));
+ return LzmaDecode(buffer, bufferSize, lc, lp, pb, data, datalen,
+ outStream, outSize, outSizeProcessed);
}
+#endif /* LZMA_WRAPPER */
+
+#if !(LZMA_WRAPPER)
+
+#define FLASH_BANK_SIZE (2<<20)
-static void print_char(char ch)
+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)
{
- if (ch == '\n')
- board_putc('\r');
- board_putc(ch);
+ return *(flash_base+flash_ofs++);
}
-static void print_str(char * str)
+static int lzma_read_byte(void *object, unsigned char **buffer, UInt32 *bufferSize)
{
- while ( *str != 0 )
- print_char(*str++);
+ 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 void print_hex(int val)
+static ILzmaInCallback lzma_callback = {
+ .Read = lzma_read_byte,
+};
+
+static __inline__ unsigned int read_le32(void *buf)
{
- 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);
- }
+ unsigned char *p = buf;
+
+ return ((unsigned int)p[0] + ((unsigned int)p[1] << 8) +
+ ((unsigned int)p[2] << 16) +((unsigned int)p[3] << 24));
}
-#if !(LZMA_WRAPPER)
-static unsigned char *find_kernel(void)
+static void decompress_init(void)
{
- struct trx_header *hdr;
- unsigned char *ret;
+ struct trx_header *hdr = NULL;
+ unsigned long kofs,klen;
- print_str("Looking for TRX header... ");
+ printf("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;
+ 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) {
- print_str("not found!\n");
- return NULL;
+ printf("not found!\n");
+ /* no compressed kernel found, halting */
+ halt();
}
- 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");
+ 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 {
- ret += read_le32(&hdr->offsets[1]);
- print_str("1\n");
+ klen = read_le32(&hdr->offsets[2]);
+ if (klen > kofs)
+ klen -= kofs;
+ else
+ klen = read_le32(&hdr->len)-kofs;
}
- return ret;
+ printf("found at %08X, kernel:%08X len:%08X\n", flash_ofs,
+ kofs, klen);
+
+ flash_ofs += kofs;
+ flash_max = flash_ofs+klen;
}
-#endif /* !(LZMA_WRAPPER) */
-static void halt(void)
+static int decompress_data(unsigned char *buffer, UInt32 bufferSize,
+ int lc, int lp, int pb, unsigned char *outStream, UInt32 outSize,
+ UInt32 *outSizeProcessed)
{
- print_str("\nSystem halted!\n");
- for(;;);
+ return LzmaDecode(buffer, bufferSize, lc, lp, pb, &lzma_callback,
+ outStream, outSize, outSizeProcessed);
}
+#endif /* !(LZMA_WRAPPER) */
/* should be the first function */
void decompress_entry(unsigned long reg_a0, unsigned long reg_a1,
unsigned int pb; /* pos state bits */
unsigned int osize; /* uncompressed size */
int res;
-#if !(LZMA_WRAPPER)
- ILzmaInCallback callback;
-#endif
board_init();
- print_str("\n\nLZMA loader for " CONFIG_BOARD_NAME
+ printf("\n\nLZMA loader for " CONFIG_BOARD_NAME
", Copyright (C) 2007 OpenWrt.org\n\n");
-#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();
- }
-
- datalen = ((unsigned char *) KSEG1ADDR(ADM5120_FLASH_END))-data;
-#endif
+ decompress_init();
/* lzma args */
i = get_byte();
for (i = 0; i < 4; i++)
get_byte();
- print_str("decompressing kernel... ");
+ printf("decompressing kernel... ");
/* decompress kernel */
-#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
+ res = decompress_data(workspace, ~0, lc, lp, pb,
+ (unsigned char *)LOADADDR, osize, &i);
+
if (res != LZMA_RESULT_OK) {
- print_str("failed!\n");
- print_str("LzmaDecode: ");
+ printf("failed, ");
switch (res) {
case LZMA_RESULT_DATA_ERROR:
- print_str("data error\n");
+ printf("data error!\n");
break;
case LZMA_RESULT_NOT_ENOUGH_MEM:
- print_str("not enough memory\n");
+ printf("not enough memory!\n");
break;
default:
- print_str("unknown error, err=0x");
- print_hex(res);
- print_str("\n");
+ printf("unknown error %d!\n", res);
}
halt();
- }
-
- print_str("done!\n");
+ } else
+ printf("done!\n");
blast_dcache(dcache_size, dcache_lsize);
blast_icache(icache_size, icache_lsize);
- print_str("launching kernel...\n\n");
+ printf("launching kernel...\n\n");
#ifdef CONFIG_PASS_KARGS
reg_a0 = 0;
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