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Optimize flash_make_cmd in drivers/cfi_flash.c for little endian 

Fix "WARNING: flash_make_cmd: unsuppported LittleEndian mode"
message when probing for nonexistent flash in little endian mode.
As a side effect more efficient and smaller code is generated,
which is always a Good Thing (TM).
Patch by Ladislav Michl, 24 Sep 2005
This commit is contained in:
Wolfgang Denk 2005-09-24 23:32:48 +02:00
parent 28cb937584
commit dafbe3790e
2 changed files with 11 additions and 23 deletions
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7
CHANGELOG
View File

@ -2,6 +2,13 @@
Changes for U-Boot 1.1.4:
======================================================================
* Optimize flash_make_cmd in drivers/cfi_flash.c for little endian
Fix "WARNING: flash_make_cmd: unsuppported LittleEndian mode"
message when probing for nonexistent flash in little endian mode.
As a side effect more efficient and smaller code is generated,
which is always a Good Thing (TM).
Patch by Ladislav Michl, 24 Sep 2005
* Update for TFTP using a fixed UDP port
Use the approved environment variable names. Added "tftpdstp" to
allow ports other than 69 per Tolunay Orkun's recommendation.

27
drivers/cfi_flash.c
View File

@ -47,7 +47,6 @@
#include <common.h>
#include <asm/processor.h>
#include <asm/byteorder.h>
#include <linux/byteorder/swab.h>
#include <environment.h>
#ifdef CFG_FLASH_CFI_DRIVER
@ -797,32 +796,14 @@ static void flash_add_byte (flash_info_t * info, cfiword_t * cword, uchar c)
static void flash_make_cmd (flash_info_t * info, uchar cmd, void *cmdbuf)
{
int i;
#if defined(__LITTLE_ENDIAN)
ushort stmpw;
uint stmpi;
#endif
uchar *cp = (uchar *) cmdbuf;
for (i = 0; i < info->portwidth; i++)
*cp++ = ((i + 1) & (info->chipwidth - 1)) ? '\0' : cmd;
#if defined(__LITTLE_ENDIAN)
switch (info->portwidth) {
case FLASH_CFI_8BIT:
break;
case FLASH_CFI_16BIT:
stmpw = *(ushort *) cmdbuf;
*(ushort *) cmdbuf = __swab16 (stmpw);
break;
case FLASH_CFI_32BIT:
stmpi = *(uint *) cmdbuf;
*(uint *) cmdbuf = __swab32 (stmpi);
break;
default:
puts ("WARNING: flash_make_cmd: unsuppported LittleEndian mode\n");
break;
}
for (i = info->portwidth; i > 0; i--)
#else
for (i = 1; i <= info->portwidth; i++)
#endif
*cp++ = (i % info->chipwidth) ? '\0' : cmd;
}
/*