186 lines
4.8 KiB
C
186 lines
4.8 KiB
C
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/*
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* U-boot - bf533_string.c Contains library routines.
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*
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* Copyright (c) 2005 blackfin.uclinux.org
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*
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* (C) Copyright 2000-2004
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* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#include <common.h>
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#include <asm/setup.h>
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#include <asm/page.h>
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#include <asm/cpu/defBF533.h>
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void *dma_memcpy(void *,const void *,size_t);
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char *strcpy(char *dest, const char *src)
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{
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char *xdest = dest;
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char temp = 0;
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__asm__ __volatile__
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("1:\t%2 = B [%1++] (Z);\n\t"
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"B [%0++] = %2;\n\t"
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"CC = %2;\n\t"
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"if cc jump 1b (bp);\n":"=a"(dest), "=a"(src), "=d"(temp)
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:"0"(dest), "1"(src), "2"(temp):"memory");
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return xdest;
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}
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char *strncpy(char *dest, const char *src, size_t n)
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{
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char *xdest = dest;
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char temp = 0;
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if (n == 0)
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return xdest;
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__asm__ __volatile__
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("1:\t%3 = B [%1++] (Z);\n\t"
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"B [%0++] = %3;\n\t"
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"CC = %3;\n\t"
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"if ! cc jump 2f;\n\t"
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"%2 += -1;\n\t"
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"CC = %2 == 0;\n\t"
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"if ! cc jump 1b (bp);\n"
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"2:\n":"=a"(dest), "=a"(src), "=da"(n), "=d"(temp)
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:"0"(dest), "1"(src), "2"(n), "3"(temp)
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:"memory");
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return xdest;
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}
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int strcmp(const char *cs, const char *ct)
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{
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char __res1, __res2;
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__asm__
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("1:\t%2 = B[%0++] (Z);\n\t" /* get *cs */
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"%3 = B[%1++] (Z);\n\t" /* get *ct */
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"CC = %2 == %3;\n\t" /* compare a byte */
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"if ! cc jump 2f;\n\t" /* not equal, break out */
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"CC = %2;\n\t" /* at end of cs? */
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"if cc jump 1b (bp);\n\t" /* no, keep going */
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"jump.s 3f;\n" /* strings are equal */
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"2:\t%2 = %2 - %3;\n" /* *cs - *ct */
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"3:\n": "=a"(cs), "=a"(ct), "=d"(__res1),
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"=d"(__res2)
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: "0"(cs), "1"(ct));
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return __res1;
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}
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int strncmp(const char *cs, const char *ct, size_t count)
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{
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char __res1, __res2;
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if (!count)
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return 0;
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__asm__
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("1:\t%3 = B[%0++] (Z);\n\t" /* get *cs */
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"%4 = B[%1++] (Z);\n\t" /* get *ct */
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"CC = %3 == %4;\n\t" /* compare a byte */
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"if ! cc jump 3f;\n\t" /* not equal, break out */
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"CC = %3;\n\t" /* at end of cs? */
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"if ! cc jump 4f;\n\t" /* yes, all done */
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"%2 += -1;\n\t" /* no, adjust count */
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"CC = %2 == 0;\n\t" "if ! cc jump 1b;\n" /* more to do, keep going */
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"2:\t%3 = 0;\n\t" /* strings are equal */
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"jump.s 4f;\n" "3:\t%3 = %3 - %4;\n" /* *cs - *ct */
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"4:": "=a"(cs), "=a"(ct), "=da"(count), "=d"(__res1),
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"=d"(__res2)
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: "0"(cs), "1"(ct), "2"(count));
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return __res1;
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}
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/*
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* memcpy - Copy one area of memory to another
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* @dest: Where to copy to
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* @src: Where to copy from
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* @count: The size of the area.
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*
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* You should not use this function to access IO space, use memcpy_toio()
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* or memcpy_fromio() instead.
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*/
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void * memcpy(void * dest,const void *src,size_t count)
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{
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char *tmp = (char *) dest, *s = (char *) src;
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/* Turn off the cache, if destination in the L1 memory */
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if ( (tmp >= (char *)L1_ISRAM) && (tmp < (char *)L1_ISRAM_END)
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|| (tmp >= (char *)DATA_BANKA_SRAM) && (tmp < DATA_BANKA_SRAM_END)
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|| (tmp >= (char *)DATA_BANKB_SRAM) && (tmp < DATA_BANKB_SRAM_END) ){
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if(icache_status()){
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blackfin_icache_flush_range(src, src+count);
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icache_disable();
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}
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if(dcache_status()){
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blackfin_dcache_flush_range(src, src+count);
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dcache_disable();
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}
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dma_memcpy(dest,src,count);
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}else{
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while(count--)
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*tmp++ = *s++;
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}
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return dest;
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}
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void *dma_memcpy(void * dest,const void *src,size_t count)
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{
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*pMDMA_D0_IRQ_STATUS = DMA_DONE | DMA_ERR;
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/* Copy sram functions from sdram to sram */
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/* Setup destination start address */
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*pMDMA_D0_START_ADDR = (volatile void **)dest;
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/* Setup destination xcount */
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*pMDMA_D0_X_COUNT = count ;
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/* Setup destination xmodify */
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*pMDMA_D0_X_MODIFY = 1;
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/* Setup Source start address */
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*pMDMA_S0_START_ADDR = (volatile void **)src;
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/* Setup Source xcount */
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*pMDMA_S0_X_COUNT = count;
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/* Setup Source xmodify */
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*pMDMA_S0_X_MODIFY = 1;
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/* Enable source DMA */
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*pMDMA_S0_CONFIG = (DMAEN);
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asm("ssync;");
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*pMDMA_D0_CONFIG = ( WNR | DMAEN);
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while(*pMDMA_D0_IRQ_STATUS & DMA_RUN){
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*pMDMA_D0_IRQ_STATUS |= (DMA_DONE | DMA_ERR);
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}
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*pMDMA_D0_IRQ_STATUS |= (DMA_DONE | DMA_ERR);
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dest += count;
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src += count;
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return dest;
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}
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