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/*
* barebox - bf533_string.c Contains library routines.
*
* Copyright (c) 2005 blackfin.uclinux.org
*
* (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
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#include <common.h>
#include <asm/setup.h>
#include <asm/page.h>
#include <asm/cpu/defBF533.h>
void *dma_memcpy(void *,const void *,size_t);
char *strcpy(char *dest, const char *src)
{
char *xdest = dest;
char temp = 0;
__asm__ __volatile__
("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");
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__
("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");
return xdest;
}
int strcmp(const char *cs, const char *ct)
{
char __res1, __res2;
__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? */
"if cc jump 1b (bp);\n\t" /* no, keep going */
"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));
return __res1;
}
int strncmp(const char *cs, const char *ct, size_t count)
{
char __res1, __res2;
if (!count)
return 0;
__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 */
"CC = %2 == 0;\n\t" "if ! cc jump 1b;\n" /* more to do, keep going */
"2:\t%3 = 0;\n\t" /* strings are equal */
"jump.s 4f;\n" "3:\t%3 = %3 - %4;\n" /* *cs - *ct */
"4:": "=a"(cs), "=a"(ct), "=da"(count), "=d"(__res1),
"=d"(__res2)
: "0"(cs), "1"(ct), "2"(count));
return __res1;
}
/*
* 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.
*/
void * memcpy(void * dest,const void *src,size_t count)
{
char *tmp = (char *) dest, *s = (char *) src;
/* Turn off the cache, if destination in the L1 memory */
if ( (tmp >= (char *)L1_ISRAM) && (tmp < (char *)L1_ISRAM_END)
|| (tmp >= (char *)DATA_BANKA_SRAM) && (tmp < DATA_BANKA_SRAM_END)
|| (tmp >= (char *)DATA_BANKB_SRAM) && (tmp < DATA_BANKB_SRAM_END) ){
if(icache_status()){
blackfin_icache_flush_range(src, src+count);
icache_disable();
}
if(dcache_status()){
blackfin_dcache_flush_range(src, src+count);
dcache_disable();
}
dma_memcpy(dest,src,count);
}else{
while(count--)
*tmp++ = *s++;
}
return dest;
}
void *dma_memcpy(void * dest,const void *src,size_t count)
{
*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);
asm("ssync;");
*pMDMA_D0_CONFIG = ( WNR | DMAEN);
while(*pMDMA_D0_IRQ_STATUS & DMA_RUN){
*pMDMA_D0_IRQ_STATUS |= (DMA_DONE | DMA_ERR);
}
*pMDMA_D0_IRQ_STATUS |= (DMA_DONE | DMA_ERR);
dest += count;
src += count;
return dest;
}
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