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Fix reds.

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@23712 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Nils Wallménius 2009-11-22 19:08:29 +00:00
parent 4279c9f4aa
commit 360d00f600
2 changed files with 6 additions and 88 deletions
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45
apps/plugins/firmware_flash.c
View file

@ -255,47 +255,6 @@ bool GetFlashInfo(tFlashInfo* pInfo)
return false; return false;
} }
/*********** Utility Functions ************/
/* Tool function to calculate a CRC32 across some buffer */
/* third argument is either 0xFFFFFFFF to start or value from last piece */
unsigned crc_32(unsigned char* buf, unsigned len, unsigned crc32)
{
/* CCITT standard polynomial 0x04C11DB7 */
static const unsigned crc32_lookup[16] =
{ /* lookup table for 4 bits at a time is affordable */
0x00000000, 0x04C11DB7, 0x09823B6E, 0x0D4326D9,
0x130476DC, 0x17C56B6B, 0x1A864DB2, 0x1E475005,
0x2608EDB8, 0x22C9F00F, 0x2F8AD6D6, 0x2B4BCB61,
0x350C9B64, 0x31CD86D3, 0x3C8EA00A, 0x384FBDBD
};
unsigned char byte;
unsigned t;
while (len--)
{
byte = *buf++; /* get one byte of data */
/* upper nibble of our data */
t = crc32 >> 28; /* extract the 4 most significant bits */
t ^= byte >> 4; /* XOR in 4 bits of data into the extracted bits */
crc32 <<= 4; /* shift the CRC register left 4 bits */
crc32 ^= crc32_lookup[t]; /* do the table lookup and XOR the result */
/* lower nibble of our data */
t = crc32 >> 28; /* extract the 4 most significant bits */
t ^= byte & 0x0F; /* XOR in 4 bits of data into the extracted bits */
crc32 <<= 4; /* shift the CRC register left 4 bits */
crc32 ^= crc32_lookup[t]; /* do the table lookup and XOR the result */
}
return crc32;
}
/*********** Firmware File Functions + helpers ************/ /*********** Firmware File Functions + helpers ************/
/* test if the version number is consistent with the platform */ /* test if the version number is consistent with the platform */
@ -389,7 +348,7 @@ tCheckResult CheckFirmwareFile(char* filename, int chipsize, bool is_romless)
if (has_crc) if (has_crc)
{ {
crc32 = crc_32(sector, SEC_SIZE, crc32); /* checksum */ crc32 = rb->crc_32(sector, SEC_SIZE, crc32); /* checksum */
/* in addition to the CRC, my files also have a platform ID */ /* in addition to the CRC, my files also have a platform ID */
if (sector[PLATFORM_ADR] != PLATFORM_ID) /* for our hardware? */ if (sector[PLATFORM_ADR] != PLATFORM_ID) /* for our hardware? */
@ -442,7 +401,7 @@ tCheckResult CheckFirmwareFile(char* filename, int chipsize, bool is_romless)
if (has_crc) if (has_crc)
{ {
crc32 = crc_32(sector, got_now, crc32); /* checksum */ crc32 = rb->crc_32(sector, got_now, crc32); /* checksum */
} }
} while (fileleft); } while (fileleft);

49
apps/plugins/iriver_flash.c
View file

@ -177,47 +177,6 @@ bool cfi_get_flash_info(struct flash_info* pInfo)
return false; return false;
} }
/*********** Utility Functions ************/
/* Tool function to calculate a CRC32 across some buffer */
/* third argument is either 0xFFFFFFFF to start or value from last piece */
unsigned crc_32(const unsigned char* buf, unsigned len, unsigned crc32)
{
/* CCITT standard polynomial 0x04C11DB7 */
static const unsigned crc32_lookup[16] =
{ /* lookup table for 4 bits at a time is affordable */
0x00000000, 0x04C11DB7, 0x09823B6E, 0x0D4326D9,
0x130476DC, 0x17C56B6B, 0x1A864DB2, 0x1E475005,
0x2608EDB8, 0x22C9F00F, 0x2F8AD6D6, 0x2B4BCB61,
0x350C9B64, 0x31CD86D3, 0x3C8EA00A, 0x384FBDBD
};
unsigned char byte;
unsigned t;
while (len--)
{
byte = *buf++; /* get one byte of data */
/* upper nibble of our data */
t = crc32 >> 28; /* extract the 4 most significant bits */
t ^= byte >> 4; /* XOR in 4 bits of data into the extracted bits */
crc32 <<= 4; /* shift the CRC register left 4 bits */
crc32 ^= crc32_lookup[t]; /* do the table lookup and XOR the result */
/* lower nibble of our data */
t = crc32 >> 28; /* extract the 4 most significant bits */
t ^= byte & 0x0F; /* XOR in 4 bits of data into the extracted bits */
crc32 <<= 4; /* shift the CRC register left 4 bits */
crc32 ^= crc32_lookup[t]; /* do the table lookup and XOR the result */
}
return crc32;
}
/***************** User Interface Functions *****************/ /***************** User Interface Functions *****************/
int wait_for_button(void) int wait_for_button(void)
{ {
@ -357,18 +316,18 @@ bool detect_valid_bootloader(const unsigned char *addr, int len)
{ {
int i; int i;
unsigned long crc32; unsigned long crc32;
/* Try to scan through all valid bootloaders. */ /* Try to scan through all valid bootloaders. */
for (i = 0; valid_bootloaders[i][0]; i++) for (i = 0; valid_bootloaders[i][0]; i++)
{ {
if (len > 0 && len != (long)valid_bootloaders[i][0]) if (len > 0 && len != (long)valid_bootloaders[i][0])
continue; continue;
crc32 = crc_32(addr, valid_bootloaders[i][0], 0xffffffff); crc32 = rb->crc_32(addr, valid_bootloaders[i][0], 0xffffffff);
if (crc32 == valid_bootloaders[i][1]) if (crc32 == valid_bootloaders[i][1])
return true; return true;
} }
return false; return false;
} }