2006-03-11 18:12:27 -07:00
|
|
|
/*
|
|
|
|
* U-boot - bf533_string.c Contains library routines.
|
|
|
|
*
|
2007-04-05 04:31:18 -06:00
|
|
|
* Copyright (c) 2005-2007 Analog Devices Inc.
|
2006-03-11 18:12:27 -07:00
|
|
|
*
|
|
|
|
* (C) Copyright 2000-2004
|
|
|
|
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
|
|
|
|
*
|
|
|
|
* See file CREDITS for list of people who contributed to this
|
|
|
|
* project.
|
|
|
|
*
|
|
|
|
* 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
|
2007-04-05 04:31:18 -06:00
|
|
|
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
|
|
|
|
* MA 02110-1301 USA
|
2006-03-11 18:12:27 -07:00
|
|
|
*/
|
|
|
|
|
|
|
|
#include <common.h>
|
|
|
|
#include <asm/setup.h>
|
2007-03-08 22:38:44 -07:00
|
|
|
#include <config.h>
|
|
|
|
#include <asm/blackfin.h>
|
2007-03-11 10:25:14 -06:00
|
|
|
#include <asm/io.h>
|
2007-04-05 04:34:06 -06:00
|
|
|
#include "cache.h"
|
2006-03-11 18:12:27 -07:00
|
|
|
|
|
|
|
char *strcpy(char *dest, const char *src)
|
|
|
|
{
|
|
|
|
char *xdest = dest;
|
|
|
|
char temp = 0;
|
|
|
|
|
|
|
|
__asm__ __volatile__
|
2007-03-08 22:38:44 -07:00
|
|
|
("1:\t%2 = B [%1++] (Z);\n\t"
|
|
|
|
"B [%0++] = %2;\n\t"
|
|
|
|
"CC = %2;\n\t"
|
|
|
|
"if cc jump 1b (bp);\n":"=a"(dest), "=a"(src), "=d"(temp)
|
|
|
|
:"0"(dest), "1"(src), "2"(temp):"memory");
|
2006-03-11 18:12:27 -07:00
|
|
|
|
|
|
|
return xdest;
|
|
|
|
}
|
|
|
|
|
|
|
|
char *strncpy(char *dest, const char *src, size_t n)
|
|
|
|
{
|
|
|
|
char *xdest = dest;
|
|
|
|
char temp = 0;
|
|
|
|
|
|
|
|
if (n == 0)
|
|
|
|
return xdest;
|
|
|
|
|
|
|
|
__asm__ __volatile__
|
2007-03-08 22:38:44 -07:00
|
|
|
("1:\t%3 = B [%1++] (Z);\n\t"
|
|
|
|
"B [%0++] = %3;\n\t"
|
|
|
|
"CC = %3;\n\t"
|
|
|
|
"if ! cc jump 2f;\n\t"
|
|
|
|
"%2 += -1;\n\t"
|
|
|
|
"CC = %2 == 0;\n\t"
|
|
|
|
"if ! cc jump 1b (bp);\n"
|
|
|
|
"2:\n":"=a"(dest), "=a"(src), "=da"(n), "=d"(temp)
|
|
|
|
:"0"(dest), "1"(src), "2"(n), "3"(temp)
|
|
|
|
:"memory");
|
2006-03-11 18:12:27 -07:00
|
|
|
|
|
|
|
return xdest;
|
|
|
|
}
|
|
|
|
|
|
|
|
int strcmp(const char *cs, const char *ct)
|
|
|
|
{
|
|
|
|
char __res1, __res2;
|
|
|
|
|
2007-03-08 22:38:44 -07:00
|
|
|
__asm__("1:\t%2 = B[%0++] (Z);\n\t" /* get *cs */
|
|
|
|
"%3 = B[%1++] (Z);\n\t" /* get *ct */
|
|
|
|
"CC = %2 == %3;\n\t" /* compare a byte */
|
|
|
|
"if ! cc jump 2f;\n\t" /* not equal, break out */
|
|
|
|
"CC = %2;\n\t" /* at end of cs? */
|
2006-03-11 18:12:27 -07:00
|
|
|
"if cc jump 1b (bp);\n\t" /* no, keep going */
|
2007-03-08 22:38:44 -07:00
|
|
|
"jump.s 3f;\n" /* strings are equal */
|
|
|
|
"2:\t%2 = %2 - %3;\n" /* *cs - *ct */
|
|
|
|
"3:\n": "=a"(cs), "=a"(ct), "=d"(__res1), "=d"(__res2)
|
|
|
|
: "0"(cs), "1"(ct));
|
2006-03-11 18:12:27 -07:00
|
|
|
|
|
|
|
return __res1;
|
|
|
|
}
|
|
|
|
|
|
|
|
int strncmp(const char *cs, const char *ct, size_t count)
|
|
|
|
{
|
|
|
|
char __res1, __res2;
|
|
|
|
|
|
|
|
if (!count)
|
|
|
|
return 0;
|
|
|
|
|
2007-03-08 22:38:44 -07:00
|
|
|
__asm__("1:\t%3 = B[%0++] (Z);\n\t" /* get *cs */
|
|
|
|
"%4 = B[%1++] (Z);\n\t" /* get *ct */
|
|
|
|
"CC = %3 == %4;\n\t" /* compare a byte */
|
|
|
|
"if ! cc jump 3f;\n\t" /* not equal, break out */
|
|
|
|
"CC = %3;\n\t" /* at end of cs? */
|
|
|
|
"if ! cc jump 4f;\n\t" /* yes, all done */
|
|
|
|
"%2 += -1;\n\t" /* no, adjust count */
|
2006-03-11 18:12:27 -07:00
|
|
|
"CC = %2 == 0;\n\t" "if ! cc jump 1b;\n" /* more to do, keep going */
|
2007-03-08 22:38:44 -07:00
|
|
|
"2:\t%3 = 0;\n\t" /* strings are equal */
|
2006-03-11 18:12:27 -07:00
|
|
|
"jump.s 4f;\n" "3:\t%3 = %3 - %4;\n" /* *cs - *ct */
|
2007-03-08 22:38:44 -07:00
|
|
|
"4:": "=a"(cs), "=a"(ct), "=da"(count), "=d"(__res1),
|
2006-03-11 18:12:27 -07:00
|
|
|
"=d"(__res2)
|
2007-03-08 22:38:44 -07:00
|
|
|
: "0"(cs), "1"(ct), "2"(count));
|
2006-03-11 18:12:27 -07:00
|
|
|
|
|
|
|
return __res1;
|
|
|
|
}
|
|
|
|
|
2007-04-05 04:34:06 -06:00
|
|
|
static void *dma_memcpy(void *dest, const void *src, size_t count)
|
2006-03-11 18:12:27 -07:00
|
|
|
{
|
2007-03-08 22:38:44 -07:00
|
|
|
*pMDMA_D0_IRQ_STATUS = DMA_DONE | DMA_ERR;
|
|
|
|
|
|
|
|
/* Copy sram functions from sdram to sram */
|
|
|
|
/* Setup destination start address */
|
|
|
|
*pMDMA_D0_START_ADDR = (volatile void **)dest;
|
|
|
|
/* Setup destination xcount */
|
|
|
|
*pMDMA_D0_X_COUNT = count;
|
|
|
|
/* Setup destination xmodify */
|
|
|
|
*pMDMA_D0_X_MODIFY = 1;
|
|
|
|
|
|
|
|
/* Setup Source start address */
|
|
|
|
*pMDMA_S0_START_ADDR = (volatile void **)src;
|
|
|
|
/* Setup Source xcount */
|
|
|
|
*pMDMA_S0_X_COUNT = count;
|
|
|
|
/* Setup Source xmodify */
|
|
|
|
*pMDMA_S0_X_MODIFY = 1;
|
|
|
|
|
|
|
|
/* Enable source DMA */
|
|
|
|
*pMDMA_S0_CONFIG = (DMAEN);
|
2007-03-11 10:25:14 -06:00
|
|
|
sync();
|
2007-03-08 22:38:44 -07:00
|
|
|
|
|
|
|
*pMDMA_D0_CONFIG = (WNR | DMAEN);
|
|
|
|
|
|
|
|
while (*pMDMA_D0_IRQ_STATUS & DMA_RUN) {
|
2006-03-11 18:12:27 -07:00
|
|
|
*pMDMA_D0_IRQ_STATUS |= (DMA_DONE | DMA_ERR);
|
2007-03-08 22:38:44 -07:00
|
|
|
}
|
|
|
|
*pMDMA_D0_IRQ_STATUS |= (DMA_DONE | DMA_ERR);
|
2006-03-11 18:12:27 -07:00
|
|
|
|
2007-03-08 22:38:44 -07:00
|
|
|
dest += count;
|
|
|
|
src += count;
|
|
|
|
return dest;
|
2006-03-11 18:12:27 -07:00
|
|
|
}
|
2007-04-05 04:34:06 -06:00
|
|
|
|
|
|
|
/*
|
|
|
|
* memcpy - Copy one area of memory to another
|
|
|
|
* @dest: Where to copy to
|
|
|
|
* @src: Where to copy from
|
|
|
|
* @count: The size of the area.
|
|
|
|
*
|
|
|
|
* You should not use this function to access IO space, use memcpy_toio()
|
|
|
|
* or memcpy_fromio() instead.
|
|
|
|
*/
|
|
|
|
extern void *memcpy_ASM(void *dest, const void *src, size_t count);
|
|
|
|
void *memcpy(void *dest, const void *src, size_t count)
|
|
|
|
{
|
|
|
|
char *tmp = (char *) dest, *s = (char *) src;
|
|
|
|
|
|
|
|
if (dcache_status()) {
|
|
|
|
blackfin_dcache_flush_range(src, src+count);
|
|
|
|
}
|
|
|
|
/* L1_ISRAM can only be accessed via dma */
|
|
|
|
if ((tmp >= (char *)L1_ISRAM) && (tmp < (char *)L1_ISRAM_END)) {
|
|
|
|
/* L1 is the destination */
|
|
|
|
dma_memcpy(dest,src,count);
|
|
|
|
} else if ((s >= (char *)L1_ISRAM) && (s < (char *)L1_ISRAM_END)) {
|
|
|
|
/* L1 is the source */
|
|
|
|
dma_memcpy(dest,src,count);
|
|
|
|
|
|
|
|
if (icache_status()) {
|
|
|
|
blackfin_icache_flush_range(dest, dest+count);
|
|
|
|
}
|
|
|
|
if (dcache_status()) {
|
|
|
|
blackfin_dcache_invalidate_range(dest, dest+count);
|
|
|
|
}
|
|
|
|
} else {
|
|
|
|
memcpy_ASM(dest,src,count);
|
|
|
|
}
|
|
|
|
return dest;
|
|
|
|
}
|